106 results on '"Alok Kumar Verma"'
Search Results
52. Pathogenic mechanisms of pancreatitis
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Alok Kumar Verma, Murli Manohar, Sathisha Upparahalli Venkateshaiah, Anil Mishra, and Nathan L Sanders
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Inflammation ,Review ,Proinflammatory cytokine ,03 medical and health sciences ,0302 clinical medicine ,Pancreatic cancer ,medicine ,Mitogen-activated protein kinases ,Pancreatic stellate cells ,business.industry ,medicine.disease ,3. Good health ,medicine.anatomical_structure ,Pancreatitis ,Janus kinase/signal transducers and activators ,030220 oncology & carcinogenesis ,Cancer research ,Acute pancreatitis ,Transforming growth factor-β/SMAD ,030211 gastroenterology & hepatology ,Tumor necrosis factor alpha ,medicine.symptom ,Pancreas ,Janus kinase ,business - Abstract
Pancreatitis is inflammation of pancreas and caused by a number of factors including pancreatic duct obstruction, alcoholism, and mutation in the cationic trypsinogen gene. Pancreatitis is represented as acute pancreatitis with acute inflammatory responses and; chronic pancreatitis characterized by marked stroma formation with a high number of infiltrating granulocytes (such as neutrophils, eosinophils), monocytes, macrophages and pancreatic stellate cells (PSCs). These inflammatory cells are known to play a central role in initiating and promoting inflammation including pancreatic fibrosis, i.e., a major risk factor for pancreatic cancer. A number of inflammatory cytokines are known to involve in promoting pancreatic pathogenesis that lead pancreatic fibrosis. Pancreatic fibrosis is a dynamic phenomenon that requires an intricate network of several autocrine and paracrine signaling pathways. In this review, we have provided the details of various cytokines and molecular mechanistic pathways (i.e., Transforming growth factor-β/SMAD, mitogen-activated protein kinases, Rho kinase, Janus kinase/signal transducers and activators, and phosphatidylinositol 3 kinase) that have a critical role in the activation of PSCs to promote chronic pancreatitis and trigger the phenomenon of pancreatic fibrogenesis. In this review of literature, we discuss the involvement of several pro-inflammatory and anti-inflammatory cytokines, such as in interleukin (IL)-1, IL-1β, IL-6, IL-8 IL-10, IL-18, IL-33 and tumor necrosis factor-α, in the pathogenesis of disease. Our review also highlights the significance of several experimental animal models that have an important role in dissecting the mechanistic pathways operating in the development of chronic pancreatitis, including pancreatic fibrosis. Additionally, we provided several intermediary molecules that are involved in major signaling pathways that might provide target molecules for future therapeutic treatment strategies for pancreatic pathogenesis.
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- 2017
53. A rare case to primary spinal hydatid cyst presenting with neurodeficit
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Alok Kumar Verma, Saurabh Jain, and Satish Rohra
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medicine.medical_specialty ,Adjuvant chemotherapy ,Decompression ,echinocossis ,Hydatid cyst ,Disease ,bone cyst ,03 medical and health sciences ,0302 clinical medicine ,lcsh:Orthopedic surgery ,Rare case ,parasitic diseases ,medicine ,030212 general & internal medicine ,Echinococcus granulosus ,Bone cyst ,hydatid cyst ,030222 orthopedics ,spinal cyst ,biology ,business.industry ,medicine.disease ,biology.organism_classification ,Surgery ,hydatidosis ,lcsh:RD701-811 ,Differential diagnosis ,business - Abstract
Hydatid disease, a parasitic infection caused by Echinococcus granulosus predominantly occur in liver and lungs. Skeletal involvement is uncommon and occurs in only 0.2 to 1 % of all cases. Primary spinal hydatidosis of spine is very rare. We report such a rare case of primary spinal hydatid cyst presenting with neurodeficit, which was treated surgically with excision, decompression and fixation, with aim to create the awareness among surgeon about this rare clinical presentation and pitfalls in diagnosis and management and suggest them to include it in differential diagnosis of the atypical spinal presentation. Hydatid disease necessitates high clinical suspicion, careful neuroradiological evaluation, aggressive surgical intervention, adjuvant chemotherapy and strict follow up to detect recurrence early.
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- 2017
54. Interobserver variability in Pirani clubfoot severity scoring system between the orthopedic surgeons
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Alok Kumar Verma, Mahendra Solanki, Anand Ajmera, and Saurabh Jain
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reliability and validity ,mesh:foot ,medicine.medical_specialty ,Clubfoot ,Heel ,interobserver variability ,mesh:reliability and validity ,03 medical and health sciences ,0302 clinical medicine ,Cohen's kappa ,lcsh:Orthopedic surgery ,medicine ,Deformity ,Orthopedics and Sports Medicine ,Congenital talipes equinovarus ,Foot deformity ,030222 orthopedics ,congenital abnormalities ,business.industry ,Pirani score MeSH terms: Club foot ,030229 sport sciences ,medicine.disease ,Pirani score ,mesh:Club foot ,lcsh:RD701-811 ,medicine.anatomical_structure ,foot ,Orthopedic surgery ,Physical therapy ,Original Article ,medicine.symptom ,business ,mesh:congenital abnormalities ,Foot (unit) - Abstract
Background: Congenital talipes equinovarus (clubfoot) is one of the most common congenital pediatric orthopedic foot deformity, which varies in severity and clinical course. Assessment of severity of the club foot deformity is essential to assess the initial severity of deformity, to monitor the progress of treatment, to prognosticate, and to identify early relapse. Pirani′s scoring system is most acceptable and popular for club foot deformity assessment because it is simple, quick, cost effective, and easy. Since the scoring system is subjective in nature it has inter- and intra-observer variability, it is widely used. Hence, the interobserver variability between orthopedic surgeons in assessing the club foot severity by Pirani scoring system. Materials and Methods: We assessed the interobserver variability between five orthopedic surgeons of comparable skills, in assessing the club foot severity by Pirani scoring system in 80 feet of 60 children (20 bilateral and 40 unilateral) with club foot deformity. All the five different orthopedic surgeons were familiar with Pirani clubfoot severity scoring and Ponseti cast manipulation, as they had already worked in CTEV clinics for at least 2 months. Each of them independently scored, each foot as per the Pirani clubfoot scoring system and recorded total score (TS), Midfoot score (MFS), Hind foot score (HFS), posterior crease (PC), emptiness of heel (EH), rigidity of equnius (RE), medial crease (MC), curvature of lateral border (CLB), and lateral head of talus (LHT). Interobserver variability was calculated using kappa statistic for each of these signs and was judged as poor (0.00-0.20), fair (0.21-0.40), moderate (0.41-0.60), substantial (0.61-0.80), or almost perfect (0.81-1.00). Results: The mean age was 137 days (range 21-335) days. The mean Pirani score was 3.86. We found the overall consistency to be substantial for overall score (total score kappa - 0.71) and also for midfoot (0.68) and hindfoot (0.66) separately. The consistency was least for the emptiness of heel (kappa - 0.39), and best for rigidity of equnius (kappa - 0.68) and rest of the parameters were moderate (kappa between 0.40 and 0.60). Conclusion: The Pirani scoring system had got substantial reliability in assessing the clubfoot deformity even when the reliability test was extended to five different orthopedic surgeons simultaneously.
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- 2017
55. Cutaneous exposure to clinically-relevant pigeon pea (Cajanus cajan) proteins promote TH2-dependent sensitization and IgE-mediated anaphylaxis in Balb/c mice
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Mukul Das, Ruchi Roy, Kriti Gupta, Premendra D. Dwivedi, Bhushan P. Chaudhari, Akanksha Sharma, Sandeep Kumar, Irfan A. Ansari, Alok Kumar Verma, and Rinkesh Kumar Gupta
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0301 basic medicine ,integumentary system ,biology ,business.industry ,Immunology ,food and beverages ,Eosinophil ,Toxicology ,biology.organism_classification ,Immunoglobulin E ,Mast cell ,medicine.disease ,BALB/c ,Allergic sensitization ,03 medical and health sciences ,030104 developmental biology ,medicine.anatomical_structure ,biology.protein ,medicine ,business ,Anaphylaxis ,Sensitization ,Filaggrin - Abstract
Epicutaneous (EC) sensitization to food allergens may occur when the skin has been lightly damaged. The study here tested whether cutaneous exposure to pigeon pea protein(s) may cause allergic sensitization. BALB/c mice were either orally gavaged or epicutaneously sensitized by repeated application of pigeon pea crude protein extract (CPE) on undamaged areas of skin without any adjuvant; afterwards, both groups were orally challenged with the pigeon pea CPE. Anaphylactic symptoms along with measures of body temperature, MCPT-1, TSLP, pigeon pea-specific IgE and IgG1, myeloperoxidase (MPO) activity, TH2 cytokines, TH2 transcription factors (TFs) and filaggrin expression were determined. Mast cell staining, eosinophil levels and histopathological analysis of the skin and intestines were also performed. In the epicutaneously-sensitized mice, elevated levels of specific IgE and IgG1, as well as of MCPT-1, TSLP, TH2 cytokines and TFs, higher anaphylactic scores and histological changes in the skin and intestine were indicative of sensitization ability via both routes in the pigeon pea CPE-treated hosts. Elevated levels of mast cells were observed in both the skin and intestine; increased levels of eosinophils and MPO activity were noted only in the skin. Decreased levels of filaggrin in skin may have played a key role in the skin barrier dysfunction, increasing the chances of sensitization. Therefore, the experimental data support the hypothesis that in addition to oral exposure, skin exposure to food allergens can promote TH2-dependent sensitization, IgE-mediated anaphylaxis and intestinal changes after oral challenge. Based on this, an avoidance of cutaneous exposures to allergens might prevent development of food anaphylaxis.
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- 2016
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56. Purification, characterization and allergenicity assessment of 26 kDa protein, a major allergen from Cicer arietinum
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Rinkesh Kumar Gupta, Dinesh Kumar, Mukul Das, Premendra D. Dwivedi, Sandeep Kumar, Akanksha Sharma, B.H. Giridhar, Alok Kumar Verma, and Kriti Gupta
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0301 basic medicine ,Immunology ,Population ,Biology ,Mice ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Tandem Mass Spectrometry ,In vivo ,medicine ,Animals ,Humans ,education ,Molecular Biology ,Protein kinase C ,Plant Proteins ,Mice, Inbred BALB C ,education.field_of_study ,Albumin ,Allergens ,Mast cell ,Cicer ,030104 developmental biology ,medicine.anatomical_structure ,chemistry ,Biochemistry ,biology.protein ,Prostaglandin D2 ,Protein A ,Food Hypersensitivity ,Histamine ,Chromatography, Liquid ,030215 immunology - Abstract
Chickpea (CP), a legume of the family Fabaceae, is an important nutrient-rich food providing protein, essential amino acids, vitamins, dietary fibre, and minerals. Unfortunately, several IgE-binding proteins in CP have been detected that are responsible for allergic manifestations in sensitized population. Therefore, the prevalence of CP induced allergy prompted us towards purification, characterization and allergenicity assessment of a major ∼26kDa protein from chickpea crude protein extract (CP-CPE). Purification of CP 26kDa protein was done using a combination of fractionation and anion exchange chromatography. This protein was further characterized as "Chain A, crystal structure of a plant albumin" from Cicer arietinum with Mol wt 25.8kDa by Liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis. Further, allergenic potential of purified 25.8kDa protein was assessed using in vivo and in vitro model. Purified protein showed IgE-binding capacity with sensitized BALB/c mice and CP allergic patient's sera. Enhanced levels of specific and total IgE, MCP-1, MCPT-1, myeloperoxidase, histamine, prostaglandin D2, and cysteinyl leukotriene were found in sera of mice treated with CP ∼26kDa protein. Further, expressions of Th2 cytokines (i.e. IL-4, IL-5, IL-13), transcription factors (i.e. GATA-3, STAT-6, SOCS-3) and mast cell signaling proteins (Lyn, cFgr, Syk, PLC-γ2, PI-3K, PKC) were also found increased at mRNA and protein levels in the intestines of mice treated with CP ∼26kDa protein. In addition, enhanced release of β-hexosaminidase, histamine, cysteinyl leukotriene and prostaglandin D2 were observed in RBL2H3 cell line when treated (125μg) with CP 26kDa protein. Conclusively, in vivo and in vitro studies revealed the allergenic potential of purified CP 26kDa protein. Being a potential allergen, plant albumin may play a pivotal role in CP induced allergenicity. Current study will be helpful for better development of therapeutic approaches to prevent the allergenicity in CP sensitized individuals.
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- 2016
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57. Misalignment Faults Detection in an Induction Motor Based on Multi-scale Entropy and Artificial Neural Network
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Mahesh Kumar Kolekar, Alok Kumar Verma, and Somnath Sarangi
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Engineering ,Artificial neural network ,business.industry ,020209 energy ,Mechanical Engineering ,Energy Engineering and Power Technology ,Condition monitoring ,02 engineering and technology ,GeneralLiterature_MISCELLANEOUS ,Frequency spectrum ,Vibration ,Motor shaft ,Multi scale entropy ,Control theory ,0202 electrical engineering, electronic engineering, information engineering ,020201 artificial intelligence & image processing ,Electrical and Electronic Engineering ,business ,Induction motor - Abstract
Misalignment is one of the most frequent faults observed in rotating machinery. In the present work, the misalignment fault of a motor shaft is studied using multi-scale entropy in combination with a back-propagation neural network algorithm. Experiments were performed, first with an aligned motor shaft, and then with a motor shaft that had angular and parallel misalignment at different operating speeds. Real-time motor current and vibration signals from aligned and different misaligned motor shafts were acquired for the diagnosis of faults. The existing literature mostly focused in the context of frequency-domain analysis. However, in this work multi-scale entropy is used, which accounts for the system complexity. A clear indication of reduction in complexity is observed with the faulty system. The proposed methodology is the first of its kind to detect the misalignment fault using the analysis of both vibration and current signals. The proposed work has also successfully identified for different...
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- 2016
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58. Reversion of Asthmatic Complications and Mast Cell Signalling Pathways in BALB/c Mice Model Using Quercetin Nanocrystals
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Rinkesh Kumar Gupta, Kriti Gupta, Akanksha Sharma, Premendra D. Dwivedi, Sandeep Kumar, Alok Kumar Verma, K. Stalin, Mukul Das, Bhushan P. Chaudhari, and Surinder P. Singh
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0301 basic medicine ,Biomedical Engineering ,Pharmaceutical Science ,Medicine (miscellaneous) ,Bioengineering ,Pharmacology ,Immunoglobulin E ,Antioxidants ,BALB/c ,Mice ,03 medical and health sciences ,chemistry.chemical_compound ,Nanocapsules ,medicine ,Animals ,General Materials Science ,Anti-Asthmatic Agents ,Mast Cells ,Mice, Inbred BALB C ,Dose-Response Relationship, Drug ,biology ,FCER1 ,Remission Induction ,Degranulation ,Drug Synergism ,Mast cell ,biology.organism_classification ,Asthma ,Ovalbumin ,Dose–response relationship ,Treatment Outcome ,030104 developmental biology ,medicine.anatomical_structure ,chemistry ,Immunology ,biology.protein ,Cytokines ,Female ,Quercetin ,Signal Transduction - Abstract
The tranquillizing effects of quercetin on allergic asthma are promising, but its poor water solubility and bioavailability is still a bottleneck. In this study, an ovalbumin (OVA) sensitized BALB/c mice asthma model was used to investigate the potential of quercetin nanocrystals (nQ) on relieving asthma aggravation. The water soluble nQ was prepared by the homogenization using the high energy sonication method. X-ray diffraction data showed the formation of nQ (10-30 nm) which was in agreement with transmission electron microscopy. The nQ was found to be more stable and soluble in PBS, and sera of BALB/c mice compared to bulk quercetin. Dose dependent experiments with nQ on OVA sensitized asthma mice exhibited significant anti-asthmatic potential of nQ at much lower dose (1 mg/kg body weight) compared to bulk quercetin. The treatment of nQ remarkably resulted in reduced OVA specific immunoglobulin E (sIgE) production, anaphylaxis signs and type 1 skin test. The nQ also significantly modulated the expression of Th2 cytokines like IL-4 and IL-5, which are responsible for IgE class switching and suppressed the degranulation/secretion of different chemical mediators (PGD2, mMCPT-1 Cys-L and TSLP) from activated mast cells. The levels of FcεR1, Syk, c-Yes, PI-3, p-PI-3, PLC-γ2, and p-PLC-γ2 were found to be reduced in the OVA sensitized BALB/c mice treated with nQ compared to those treated with OVA only. The results indicate that nQ alleviate pulmonary inflammation and airway hyporesponsiveness in allergic asthma at much lower dose compared to bulk quercetin and may be considered as a potential drug for the treatment of asthmatic patients.
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- 2016
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59. Significance of Eosinophils in Promoting Pancreatic malignancy
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Sathisha Upparahalli Venkateshaiah, Alok Kumar Verma, Murli Manohar, and Anil Mishra
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Pathology ,medicine.medical_specialty ,biology ,medicine.diagnostic_test ,business.industry ,Degranulation ,Eosinophil ,Immunoglobulin E ,medicine.disease ,Article ,medicine.anatomical_structure ,Fibrosis ,Pancreatic cancer ,Biopsy ,biology.protein ,medicine ,Major basic protein ,Pancreatitis ,business - Abstract
Background Several reports indicate that eosinophils are induced in chronic pancreatitis including patients with pancreatic malignancy. However, significance of eosinophilic pancreatitis (EP) is poorly understood and unexplored. Aim Accumulation and degranulation of eosinophils promote pancreatic fibrosis and malignancy. Method Human pancreatic tissue biopsy samples including chronic pancreatitis (n=3), malignant (n=4), non-malignant (n=3), and normal (n=3) were used for H&E, anti-MBP staining, anti-tryptase staining, anti-IgE staining and Mason's trichrome staining. Results We show induced eosinophils and degranulated eosinophils indicated by the presence of anti-MBP stained extracellular granules in the malignant pancreatic (pancreatic cancer) and non-malignant human pancreatic tissues. A comparable number of eosinophils were observed in non-malignant and malignant pancreatic tissue sections, but the sections differed in degranulated eosinophils and the presence of extracellular granules. Additionally, induced mast cells and tissue-specific IgE positive cells were also detected in the tissue sections of malignant pancreatitis patients compared to non-malignant human pancreatic patients. Tissue-specific IgE induction is critical for the degranulation of eosinophils and mast cells that may lead to increased accumulation of collagen in malignant compared to non-malignant human pancreatic tissue samples. We show a large number of anti-tryptase stained extracellular granules in the tissue sections of malignant pancreatic cancer patients. Both IgE and eosinophil major basic proteins (MBP) are reported for the activation and degranulation of mast cells in tissues. Conclusion Taken together, our investigation concludes that eosinophils and mast cells accumulation and degranulation are critical in promoting pancreatitis pathogenesis that may lead to the development of pancreatic fibrosis and malignancy.
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- 2018
60. Patterns of failure observed with omission of internal mammary chain irradiation in central/inner vs. outer quadrant tumors in a retrospective audit of an unselected breast cancer patient population
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Rohtas Yadav, Gopal Agrawal, Subarna Misra, Sushma Agrawal, Alok Kumar Verma, D. Kumar, Shaleen Kumar, Amit Agrawal, Punita Lal, and Sanjeev Misra
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Patterns of failure ,Outer quadrant ,Patient population ,medicine.medical_specialty ,Breast cancer ,business.industry ,Medicine ,Surgery ,General Medicine ,Audit ,Radiology ,business ,medicine.disease - Published
- 2019
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61. A Comprehensive Review on Mustard-Induced Allergy and Implications for Human Health
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Rinkesh Kumar Gupta, Premendra D. Dwivedi, Alok Kumar Verma, Neelabh, and Akanksha Sharma
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0301 basic medicine ,Adult ,Male ,Allergy ,Food Handling ,Health Status ,Cross Reactions ,medicine.disease_cause ,Cross-reactivity ,03 medical and health sciences ,Human health ,0302 clinical medicine ,Allergen ,medicine ,Immunology and Allergy ,Humans ,Plant Oils ,In patient ,Child ,Anaphylaxis ,030203 arthritis & rheumatology ,integumentary system ,Mechanism (biology) ,business.industry ,General Medicine ,Allergens ,Immunoglobulin E ,Middle Aged ,Patch Tests ,Idiopathic anaphylaxis ,medicine.disease ,030104 developmental biology ,Immunology ,Pollen ,Female ,business ,Food Hypersensitivity ,Mustard Plant - Abstract
Mustard is widely used in a variety of foods/food products to enhance the flavor and nutritional value that subsequently raise the risk of hypersensitivity reactions. Mustard allergy has been reported for many years and is increasing gradually especially in the areas where its consumption is comparatively higher, and it may be considered among the most important food allergies. A number of relevant clinical studies focused on mustard-induced allergic manifestations are summarized in the current review. In addition, the knowledge regarding the immunological as well as biochemical characteristics of mustard allergens that have been known till date and their cross-reactivity with other food allergens have also been discussed here. Notably, mustard may also be present as a hidden allergen in foods; therefore, it is important to recognize food products that may contain mustard as it may pose potential risk for the allergic individuals. Additionally, the better understanding of the underlying mechanism in mustard allergy is a prerequisite for the development of specific therapeutic procedures. Conclusively, mustard sensitivity should be routinely tested in patients with idiopathic anaphylaxis for the safety of the allergic patients.
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- 2017
62. Allergic manifestation by black gram (Vigna mungo) proteins in allergic patients, BALB/c mice and RBL-2H3 cells
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Rinkesh Kumar Gupta, Alok Kumar Verma, Sandeep Kumar, Dinesh Kumar, Bhushan P. Chaudhari, B.H. Giridhar, Mukul Das, Akanksha Sharma, Premendra D. Dwivedi, and Ruchi Roy
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Adult ,Male ,Allergy ,Adolescent ,Immunology ,GATA3 Transcription Factor ,Cross Reactions ,Immunoglobulin E ,Cell Line ,BALB/c ,Allergic sensitization ,Mice ,Young Adult ,chemistry.chemical_compound ,Th2 Cells ,Food allergy ,medicine ,Animals ,Humans ,Immunology and Allergy ,Lung ,Sensitization ,Aged ,Skin Tests ,Receptors, Leukotriene ,Pharmacology ,Mice, Inbred BALB C ,biology ,Prostaglandin D2 ,business.industry ,Fabaceae ,Allergens ,Antigens, Plant ,Middle Aged ,medicine.disease ,biology.organism_classification ,beta-N-Acetylhexosaminidases ,medicine.anatomical_structure ,chemistry ,biology.protein ,Cytokines ,Female ,business ,Food Hypersensitivity ,Histamine - Abstract
The prevalence of black gram (Vigna mungo) induced allergic reactions are reported from several parts of the world including Asia and Australia. But, a thorough exploration of the allergic reactions induced by black gram proteins is still lacking. Therefore, efforts have been made to explore black gram allergy using in vivo and in vitro approaches. In this study, Simulated Gastric Fluid (SGF) assay and IgE immunoblotting were carried out to identify clinically relevant allergens of black gram. BALB/c mice and RBL-2H3 cells were used for elucidation of allergenic reactions of black gram proteins. Further, this study was extended to screen black gram sensitive patients among nasobronchial allergic patients on the basis of clinical history, skin prick test (SPT), specific IgE levels and IgE immunoblotting. Enhanced levels of specific IgE, IgG1/IgG2a (p < 0.05), histamine (p < 0.05), clinical symptoms, pathological indications in the lungs, intestine and spleen were evident in black gram sensitized BALB/c mice. Moreover, the expression of Th2 cytokine transcripts and GATA-3/T-bet ratio was found enhanced in the treated group. In vitro studies on RBL-2H3 cells,showed increased release of β-hexosaminidase (p < 0.05), histamine (p < 0.05), cysteinyl leukotriene (p
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- 2014
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63. Elucidation of immediate type I reactions in native and GM mustard ( Brassica spp.)
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Bhushan P. Chaudhari, Mukul Das, Alok Kumar Verma, Premendra D. Dwivedi, Ruchi Roy, Rinkesh Kumar Gupta, Akanksha Sharma, Sandeep Kumar, and Kriti Gupta
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chemistry.chemical_classification ,Allergy ,biology ,Monocyte ,Brassica ,Immunoglobulin E ,medicine.disease ,biology.organism_classification ,Microbiology ,chemistry.chemical_compound ,medicine.anatomical_structure ,chemistry ,Immunology ,biology.protein ,medicine ,SOCS3 ,Carotenoid ,Transcription factor ,Histamine ,Food Science - Abstract
Mustard, a widely consumed spice can provoke allergic manifestations in mustard sensitive individuals. The aim of this study is to explore the allergenicity potential of GM mustard varieties (GM-V2 and GM-V4) having increased carotenoid content and compare it with the native (Varuna) and commercially available variety (Urvashi). Mustard protein sensitized (GM and non-GM) BALB/c mice sera were used to identify the allergenic proteins by IgE immunoblotting. Immunoglobulin levels, mouse mast cell protease-1, monocyte chemotactic protein and histamine were measured in serum. The levels of Th1/Th2 transcription factors GATA-3, T-bet, SOCS3, STAT 6 and c-maf in intestinal proteins of all groups were detected by immunoblotting and PCR. Major IgE-binding proteins of 21, 29 and 33kDa were found in all mustard varieties. The enhanced levels of Th2 cytokines IL-4, IL-5 and IL-13 and transcription factors GATA-3 and SOCS-3 were observed. The increased levels of MCP-1, MCPT-1 and histamine were also evident in commercial, native, GM-V2 and GM-V4 varieties of mustard treated groups. Conclusively, all these finding indicate that introduction of GM mustard varieties with increased carotenoid content did not cause any increase in allergenicity as compared to its native counterpart and therefore can be safe from allergenicity point of view.
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- 2014
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64. Hypersensitivity linked to exposure of broad bean protein(s) in allergic patients and BALB/c mice
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Sandeep Kumar, Premendra D. Dwivedi, Swatantra Kumar Jain, Dinesh Kumar, Mukul Das, Bhushan P. Chaudhari, Akanksha Sharma, Alok Kumar Verma, Anurag Tripathi, and Surya Kant
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Male ,Leukotrienes ,T-Lymphocytes ,Endocrinology, Diabetes and Metabolism ,Cell Culture Techniques ,Prostaglandin ,Biology ,Immunoglobulin E ,BALB/c ,chemistry.chemical_compound ,Food allergy ,Hypersensitivity ,medicine ,Animals ,Humans ,Cysteine ,Anaphylaxis ,Plant Proteins ,Mice, Inbred BALB C ,Gastric Juice ,Nutrition and Dietetics ,Prostaglandin D2 ,Interleukins ,food and beverages ,Interleukin ,medicine.disease ,biology.organism_classification ,beta-N-Acetylhexosaminidases ,Diet ,Vicia faba ,Molecular Weight ,chemistry ,Seeds ,Immunology ,biology.protein ,Female ,Dietary Proteins ,Food Hypersensitivity ,Spleen ,Histamine - Abstract
Objective Broad bean ( Vicia faba L.), a common vegetable, belongs to the family Fabaceae and is consumed worldwide. Limited studies have been done on allergenicity of broad beans. The aim of this study was to determine if broad bean proteins have the ability to elicit allergic responses due to the presence of clinically relevant allergenic proteins. Methods Simulated gastric fluid (SGF) assay and immunoglobulin E (IgE) immunoblotting were carried out to identify pepsin-resistant and IgE-binding proteins. The allergenicity of broad beans was assessed in allergic patients, BALB/c mice, splenocytes, and RBL-2H3 cells. Results Eight broad bean proteins of approximate molecular weight 70, 60, 48, 32, 23, 19, 15, and 10 kDa that remained undigested in SGF, showed IgE-binding capacity as well. Of 127 allergic patients studied, broad bean allergy was evident in 16 (12%). Mice sensitized with broad bean showed increased levels of histamine, total and specific IgE, and severe signs of systemic anaphylaxis compared with controls. Enhanced levels of histamine, prostaglandin D 2 , cysteinyl leukotriene, and β-hexosaminidase release were observed in the primed RBL-2H3 cells following broad bean exposure. The levels of interleukin IL-4, IL-5, IL-13 and regulated on activation, normal T-cell expressed and secreted were found enhanced in broad bean-treated splenocytes culture supernatant compared with controls. Conclusion This study inferred that broad bean proteins have the ability to elicit allergic responses due to the presence of clinically relevant allergenic proteins.
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- 2014
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65. Allergenic responses of green gram (Vigna radiata L. Millsp) proteins can be vitiated by induction of oral tolerance due to single acute dose in BALB/c mice
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Alok Kumar Verma, Amita Misra, Rinkesh Kumar Gupta, Akanksha Sharma, Ruchi Roy, Sandeep Kumar, Premendra D. Dwivedi, Kausar M. Ansari, Mukul Das, Neelabh, Gulshan Singh, Rishi Shanker, and Anurag Tripathi
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Allergy ,biology ,Pharmacology ,medicine.disease ,biology.organism_classification ,Immunoglobulin E ,BALB/c ,Vigna ,chemistry.chemical_compound ,chemistry ,Food allergy ,Immunology ,Splenocyte ,medicine ,biology.protein ,Prostaglandin D2 ,Histamine ,Food Science - Abstract
Consumption of green gram (Vigna radiata L. Millsp), a legume (family: fabaceae) induces allergic symptoms in the susceptible individuals. In the present study, an attempt has been made to induce oral tolerance in BALB/c mice as a therapeutic tool for the prevention of green gram allergy. At first set of experiments, BALB/c mice were gavaged with green gram proteins to explore their allergenicity potential. At second set of experiments, BALB/c mice were given a single acute dose ranging from 0.02 mg to 50 mg to induce oral tolerance. At first set of experiments, BALB/c showed enhanced levels of total and specific IgE, Th2 cytokines in the splenocytes and β-hexosaminidase, histamine, prostaglandin D2 and cysteinyl leukotriene release from RBL-2H3 cells when compared to their respective controls. At second set of experiments, the levels of total and specific IgE/IgG1 in the sera, anaphylaxis symptoms, delayed type hypersensitivity (DTH), CD4 + and CD8 + cells were found decreased while increased levels of Foxp3 and IL-10 were observed at the single acute dose of 20 mg green gram when compared to other groups. Taken together the allergenicity of green gram can be minimized due to induction of oral tolerance at a single acute dose of 20 mg in BALB/c mice.
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- 2014
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66. An unusual case of a very large Ameloblastic fibroma
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Premendra D. Dwivedi, B.H. Giridhar, S. K. Verma, Alok Kumar Verma, Sandeep Kumar, Rajendra Prasad, Dinesh Kumar, and Abhijeet Singh
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Allergy ,Dander ,business.industry ,medicine.disease ,respiratory tract diseases ,Atopy ,immune system diseases ,Immunology ,medicine ,Genetic predisposition ,In patient ,Age of onset ,Family history ,business ,Asthma - Abstract
Background: Prevalence of nasobronchial allergy is increasing globally. Several genetic, environmental and other associated factors are responsible for this increase. This study is designed to investigate profile of different allergens sensitivities and associated factors involved in the prevalence of naso-bronchial allergy. Methods: 4312 skin prick tests with 77 allergens in 56 patients of nasobronchial allergy were studied using parameters like age, temporal association between asthma and allergic rhinitis, most common type of allergens, age of onset, sex, residence and family history of atopy. Results: It was found that the age groups 12-40 years are more prone to nasobronchial allergy. 75% patients have shown temporal association between asthma and allergic rhinitis. Most common offending allergens were insects (33.3%), followed by pollens (30.3%), fungi (13.6%), dust (8.3%), non-juicy foods (6.8%), juicy foods (4.16%) and dander (3.03%). Males have shown more prevalence of nasobronchial allergy than that of the females. 32% patients have shown genetic disposition. Conclusions: Overall, this study unravels different associated factors and profile of allergens in patients’ of nasobronchial allergy which will be helpful in diagnosis, management and treatment of asthma.
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- 2014
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67. Chronic Pancreatitis Associated Acute Respiratory Failure
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Murli Manohar, Nathan L Sanders, Anil Mishra, Alok Kumar Verma, and Sathisha Upparahalli Venkateshaiah
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0301 basic medicine ,ARDS ,Respiratory distress ,business.industry ,respiratory system ,Lung injury ,medicine.disease ,Article ,Sepsis ,03 medical and health sciences ,030104 developmental biology ,0302 clinical medicine ,030220 oncology & carcinogenesis ,Immunology ,medicine ,Acute pancreatitis ,Pancreatitis ,Respiratory system ,business ,Diffuse alveolar damage - Abstract
Pancreatitis is a condition characterized by parenchymal inflammation of the pancreas, which is often associated with lung injury due to low level of oxygen and the condition is termed as acute pancreatitis-associated lung injury (APALI). Clinical reports indicated that ~ 20% to 50% of patients from low oxygen levels in blood with acute respiratory distress syndrome (ARDS). ARDS is a severe form of acute lung injury (ALI), a pulmonary disease with impaired airflow making patients difficult to breathe. ALI is frequently observed in patients with severe acute pancreatitis. Approximately one third of severe pancreatitis patients develop acute lung injury and acute respiratory distress syndrome that account for 60% of all deaths within the first week. The major causes of ALI and ARDS are sepsis, trauma, aspiration, multiple blood transfusion, and most importantly acute pancreatitis. The molecular mechanisms of ALI and ARDS are still not well explored, but available reports indicate the involvement of several pro-inflammatory mediators including cytokines (TNF-α, IL-1β, IL-6) and chemokines [like interleukin-8 (IL-8) and macrophage inhibitory factor (MIF)], as well as macrophage polarization regulating the migration and pulmonary infiltration of neutrophils into the pulmonary interstitial tissue, causing injury to the pulmonary parenchyma. Acute lung injury and acute respiratory distress syndrome in acute pancreatitis remains an unsolved issue and needs more research and resources to develop effective treatments and therapies. However, recent efforts have tested several molecules in an experimental model and showed promising results as a treatment option. The current review summarized the mechanism that is operational in pancreatitis-associated acute respiratory failure and respiratory distress syndrome in patients and current treatment options.
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- 2017
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68. Cutaneous exposure to clinically-relevant pigeon pea (Cajanus cajan) proteins promote T
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Rinkesh, Kumar Gupta, Sandeep, Kumar, Kriti, Gupta, Akanksha, Sharma, Ruchi, Roy, Alok, Kumar Verma, Bhushan P, Chaudhari, Mukul, Das, Irfan, Ahmad Ansari, and Premendra D, Dwivedi
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Mice, Inbred BALB C ,Plant Extracts ,Allergens ,Antigens, Plant ,Filaggrin Proteins ,Immunoglobulin E ,Eosinophils ,Mice ,Chymases ,Th2 Cells ,Cajanus ,Animals ,Cytokines ,Humans ,Immunization ,Anaphylaxis ,Cells, Cultured ,Food Hypersensitivity ,Skin - Abstract
Epicutaneous (EC) sensitization to food allergens may occur when the skin has been lightly damaged. The study here tested whether cutaneous exposure to pigeon pea protein(s) may cause allergic sensitization. BALB/c mice were either orally gavaged or epicutaneously sensitized by repeated application of pigeon pea crude protein extract (CPE) on undamaged areas of skin without any adjuvant; afterwards, both groups were orally challenged with the pigeon pea CPE. Anaphylactic symptoms along with measures of body temperature, MCPT-1, TSLP, pigeon pea-specific IgE and IgG
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- 2016
69. An intelligent technique for posture and fall detection using multiscale entropy analysis and fuzzy logic
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Haoyong Yu, Alok Kumar Verma, Reshma A. Merchant, and Santhosh Seetharaman
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Engineering ,business.industry ,020209 energy ,Work (physics) ,Triaxial accelerometer ,ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION ,Wearable computer ,02 engineering and technology ,Fuzzy logic ,Multiscale entropy ,Acceleration ,0202 electrical engineering, electronic engineering, information engineering ,Wireless ,Computer vision ,Fall detection ,Artificial intelligence ,business ,Simulation - Abstract
Recognition of human body posture from the signals of wearable sensor has attracted a great interests in many applications, such as health care, aged care and sports. Main aim of the presented work is to recognize the basic activities of daily living (ADL) and detection of fall using two triaxial accelerometer located at the chest and thigh of the subject. In the present work, posture and Fall detection especially for elderly is performed using a multiscale entropy (MSE) analysis coupled with fuzzy logic (FL) algorithm. Experiments were performed with two wireless triaxial accelerometer. Real time, acceleration were acquired at ADL and were used for the diagnosis. MSE were calculated from the obtained signals and FL was coupled to model and prediction of posture. The result reflect that the proposed noble method is very useful and effective in detecting the different postures and fall. The proposed technique has been optimized to implement in real-time system.
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- 2016
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70. Allergenic Diversity among Plant and Animal Food Proteins
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Mukul Das, Premendra D. Dwivedi, Alok Kumar Verma, and Sandeep Kumar
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Allergy ,biology ,Animal food ,General Chemical Engineering ,Dietary intake ,medicine.disease ,Immunoglobulin E ,Allergic symptoms ,Food allergy ,Immunology ,medicine ,biology.protein ,Food allergens ,Anaphylaxis ,Food Science - Abstract
A large number of food allergens, usually proteins capable of inducing allergic symptoms, including severe, even life-threatening reactions in predisposed individuals, have been identified and characterized. As most of these proteins are from our daily dietary intake, they are often difficult to avoid. However, the proteins that cause such immunoglobulin E (IgE)-mediated reactions can be assigned to only a limited number of protein families. Detailed knowledge about the characteristics of food allergens, their structures, biological activity, and stability, may be helpful in improving diagnosis of food allergy, avoiding unnecessary exclusion of diets, and assessing the risk of cross-reactive allergies to other food sources. The purpose of this review is to shed light on the sources and molecular properties of the allergenic proteins, their stability, the mechanisms of the allergenic responses, and recent findings related to prevention of this serious issue.
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- 2012
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71. Chickpea (Cicer arietinum) proteins induce allergic responses in nasobronchial allergic patients and BALB/c mice
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Mukul Das, Bhushan P. Chaudhari, Sandeep Kumar, Anurag Tripathi, Premendra D. Dwivedi, and Alok Kumar Verma
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Adult ,Male ,Allergy ,Spleen ,Cross Reactions ,Toxicology ,Immunoglobulin E ,BALB/c ,Allergic inflammation ,Mice ,Young Adult ,chemistry.chemical_compound ,Pepsin ,Animals ,Humans ,Medicine ,Anaphylaxis ,Plant Proteins ,Skin Tests ,Mice, Inbred BALB C ,biology ,business.industry ,Fabaceae ,General Medicine ,Middle Aged ,biology.organism_classification ,medicine.disease ,Cicer ,medicine.anatomical_structure ,chemistry ,Immunoglobulin G ,Seeds ,Immunology ,biology.protein ,Cytokines ,Female ,business ,Food Hypersensitivity ,Histamine ,Ex vivo - Abstract
Allergy to chickpea or Garbanzo bean (Cicer arietinum) has been reported in the Indian population. Little information is found regarding allergenic events involved in the chickpea allergy; therefore, chickpea allergenicity assessment was undertaken. In vivo and ex vivo studies were carried out using BALB/c mice. Chickpea skin prick test positive patients have been used to extend this study in humans. Identification of allergens was carried out by simulated gastric fluids assay for pepsin resistant polypeptides and validated by IgE western blotting using chickpea sensitive humans and sensitized mice sera. Our data have shown the occurrence of a systemic anaphylactic reaction resulting in reduced body temperature after challenge along with significantly increased levels of IgE, IgG1, MMCP-1, CCL-2 as well as histamine. Further, increased Th1/Th2 (mixed) cytokine response was observed in spleen cell culture supernatants. Jejunum, lungs and spleen showed prominent histopathological changes specific for allergic inflammation. Immunoblotting with pooled sera of either sensitized mice or human sera recognized seven similar IgE binding polypeptides that may be responsible for chickpea induced hypersensitivity reactions. This study has addressed the allergenic manifestations associated with chickpea consumption and identifies the proteins responsible for allergenicity which may prove useful in diagnosis and management of allergenicity of legumes especially chickpea.
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- 2012
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72. Allergenic responses of red kidney bean (Phaseolus vulgaris cv chitra) polypeptides in BALB/c mice recognized by bronchial asthma and allergic rhinitis patients
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Sandeep Kumar, Amita Misra, Swatantra Kumar Jain, Anurag Tripathi, Alok Kumar Verma, Premendra D. Dwivedi, Mukul Das, Rajendra Prasad, and Bhushan P. Chaudhari
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Kidney ,biology ,business.industry ,food and beverages ,biology.organism_classification ,Immunoglobulin E ,medicine.disease_cause ,Mast cell ,Cross-reactivity ,BALB/c ,chemistry.chemical_compound ,medicine.anatomical_structure ,chemistry ,Immunology ,Allergic response ,biology.protein ,medicine ,Antibody ,business ,Histamine ,Food Science - Abstract
Allergenicity potential of red kidney beans (Phaseolus vulgaris cv chitra) was assessed and attempts were made to identify the responsible proteins by pepsin digestibility assay and IgE immunoblotting. To evaluate allergenic potential, BALB/c mice were sensitized with red kidney bean proteins and levels of specific immunoglobulin, histamine, mast cell protease-1, cytokines and CCL-2 were measured. To confirm our findings in BALB/c, the studies were also extended to human subjects. Human sera collected from control subjects and allergic patients after skin prick test were used for IgE immunoblotting, measuring the levels of total and specific IgE and determining cross reactivity of red kidney bean with other legumes. Red kidney bean allergenic potential was evident by significant increase in specific IgE, IgG1, histamine, mast cell protease-1 and Th2 cytokine levels in comparison to control. Enhanced level of eosinophils in jejunum, prominent anaphylactic symptoms, and eruptive histopathological changes give indication towards red kidney beans allergenicity. IgE immunoblotting detected five protein components with molecular weights of approximately 170, 100, 43, 34 and 20 kDa. Red kidney bean proteins showed cross reactivity with peanut, soybean, chickpea and black gram. Finally, this work demonstrated that red kidney beans may induce allergic response in mice similar to human subjects, with identification of five clinically relevant allergenic protein components.
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- 2011
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73. Computational allergenicity prediction of transgenic proteins expressed in genetically modified crops
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Premendra D. Dwivedi, Amita Misra, Alok Kumar Verma, Mukul Das, and Swarna Subash
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Transgene ,Food, Genetically Modified ,Immunology ,Genetically modified crops ,Computational biology ,Biology ,Toxicology ,Risk Assessment ,Genetically modified food ,Homology (biology) ,immune system diseases ,otorhinolaryngologic diseases ,Immunology and Allergy ,Plant Proteins ,Pharmacology ,Sequence Homology, Amino Acid ,business.industry ,General Medicine ,Allergens ,respiratory system ,Plants, Genetically Modified ,respiratory tract diseases ,Biotechnology ,Genetically modified organism ,Sequence homology ,Consumer Product Safety ,business ,Food Hypersensitivity ,Software - Abstract
Development of genetically modified (GM) crops is on increase to improve food quality, increase harvest yields, and reduce the dependency on chemical pesticides. Before their release in marketplace, they should be scrutinized for their safety. Several guidelines of different regulatory agencies like ILSI, WHO Codex, OECD, and so on for allergenicity evaluation of transgenics are available and sequence homology analysis is the first test to determine the allergenic potential of inserted proteins. Therefore, to test and validate, 312 allergenic, 100 non-allergenic, and 48 inserted proteins were assessed for sequence similarity using 8-mer, 80-mer, and full FASTA search. On performing sequence homology studies, ~94% the allergenic proteins gave exact matches for 8-mer and 80-mer homology. However, 20 allergenic proteins showed non-allergenic behavior. Out of 100 non-allergenic proteins, seven qualified as allergens. None of the inserted proteins demonstrated allergenic behavior. In order to improve the predictability, proteins showing anomalous behavior were tested by Algpred and ADFS separately. Use of Algpred and ADFS softwares reduced the tendency of false prediction to a great extent (74-78%). In conclusion, routine sequence homology needs to be coupled with some other bioinformatic method like ADFS/Algpred to reduce false allergenicity prediction of novel proteins.
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- 2010
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74. Bio-transformation of FXR antagonist CDRI 80/574
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Ram Pratap, Priti Khemaria, Bhawani S. Joshi, Dharmendra Singh, Raja Roy, Jyoti Gupta, Anjani K. Mishra, and Alok Kumar Verma
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lcsh:QD241-441 ,Bio transformation ,Aspergillus ,Membrane ,lcsh:Organic chemistry ,biology ,Chemistry ,Stereochemistry ,Organic Chemistry ,Aspergillus niger ,Antagonist ,Farnesoid X receptor ,biology.organism_classification - Abstract
The bio-transformation of 3-β-hydroxy-5, 16-dien-pregnane-20-one (CDRI 80/574, 1) a novel antagonist of farnesoid X receptor (FXR) on hepatic membranes, with Aspergillus niger produced the oxidation products at C3 and / or C11 (compound 2 and 3) while the Aspergillus ochraeus promoted the oxidation at C11 and / or C15 (compound 4 and 5). The products were characterized using 2D-NMR spectroscopy.
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- 2010
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75. Role of Vasoactive Intestinal Peptide in Promoting the Pathogenesis of Eosinophilic Esophagitis (EoE)
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Anil Mishra, Alok Kumar Verma, Sathisha Upparahalli Venkateshaiah, Margaret H. Collins, Uwe Blecker, and Murli Manohar
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0301 basic medicine ,Hepatology ,business.industry ,Vasoactive intestinal peptide ,Gastroenterology ,VIP, vasoactive intestinal peptide ,medicine.disease ,IL, interleukin ,Pathogenesis ,03 medical and health sciences ,030104 developmental biology ,0302 clinical medicine ,VPAC, vasoactive intestinal peptide receptor ,Immunology ,Research Letter ,medicine ,lcsh:Diseases of the digestive system. Gastroenterology ,030211 gastroenterology & hepatology ,EoE, eosinophilic esophagitis ,lcsh:RC799-869 ,Eosinophilic esophagitis ,business - Published
- 2018
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76. Fault Diagnosis of Broken Rotor Bars in Induction Motor Using Multiscale Entropy and Backpropagation Neural Network
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Somnath Sarangi and Alok Kumar Verma
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Artificial neural network ,Stator ,law ,Control theory ,Computer science ,Bar (music) ,Rotor (electric) ,Control engineering ,Fault (power engineering) ,Backpropagation ,Induction motor ,Fault detection and isolation ,law.invention - Abstract
Interruptions in any process industry due to machinery problem induce a serious financial loss. And as we know that induction motors occupy a major area in machinery and process industry, detection of faults beforehand is a key to avoid the state of financial or production crisis in future. The present work proposes a novel algorithm for the detection of broken rotor bars in induction motor. Stator current in addition to rotor vibration in an induction motor was measured and employed for fault detection of broken rotor bar. Multiscale entropy (MSE) is used as statistic-based approach in order to tackle the nonlinear behavior existing in rotor bar using vibration and current as the diagnostic media, as both cumulatively considered describe the regularity in the diagnostic information. The proposed work presents an approach to analyze features that distinguish the rotor vibration and stator current samples of normal induction motor from those of the broken rotor bar. Further, backpropagation neural network classifier is applied over the resultant feature set which distinguishes the faulty data set from the healthy with an accuracy level of 15.5 % for vibration and 14 % for current.
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- 2015
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77. Regulatory effects of Interleukin (IL)-15 on allergen-induced airway obstruction
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Sathisha Upparahalli Venkateshaiah, Murli Manohar, Alok Kumar Verma, and Anil Mishra
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Immunology ,Immunology and Allergy - Abstract
Airway obstruction is a highly specific term that represents physiologic abnormalities of the airways and induced levels is observed in steroid treated asthmatic patients. We tested the hypothesis that regulation of IL-15 is critical for the preservation of allergen-induced airway hyperresponsiveness (AHR), airway resistance and compliance in response to methacholine. Airway inflammation, AHR, resistance and compliance were assessed in IL-15-deficient mice and IL-15 overexpressed mice in allergen-induced murine model of asthma. Lung histological analysis for eosinophils by anti-MBP immunostaining, Goblet cells hyperplasia by PAS staining, cytokines and chemokine levels by qPCR and ELISA analyses. Herein, we made a novel observation that IL-15 deficiency promotes baseline airway resistance in naïve mice. Moreover, rIL-15 delivery to the lung downregulates expression of inflammatory cytokines, and improves allergen-induced AHR, resistance and compliance. These observations were further validated in DOX-inducible CC-10-IL-15 transgenic mice. DOX exposed Aspergillus extract challenged CC-10-IL-15 bitransgenic mice exhibited significantly reduced levels of inflammatory cytokines (IL-4, IL-5, IL-13) and goblet cell hyperplasia. Airway obstruction, including AHR and resistance was diminished in allergen challenged DOX exposed compare to no-DOX exposed CC-10-IL-15 bitransgenic mice. Mechanistically, we observed that IL-15-induced protection of airway obstruction is associated with the induced IL-10-producing regulatory CD4+CD25+Foxp3+ T cells. We report our novel finding that IL-15 has a potent inhibitory effect on the airway obstruction that occurs in response to environmental allergens/pollutants.
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- 2017
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78. Significance of VIP and VIP receptor interaction in promoting pathogenesis of Eosinophilic esophagitis
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Alok Kumar Verma, Sathisha Upparahalli Venkateshaiah, Murli Manohar, and Anil Mishra
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Immunology ,Immunology and Allergy - Abstract
Vasoactive intestinal peptide (VIP) is shown to have a role in the esophageal sphincter contraction and relaxation, and its role in pathogenesis of eosinophil associated allergic diseases like asthma and rhinitis is reported. Therefore, we tested the hypothesis that VIP may have an important role in the eosinophils accumulation in the esophagus that promote the pathogenesis of eosinophilic esophagitis (EoE). Accordingly, we performed flow cytometer analysis for VIP receptors expression in the blood eosinophils and real time PCR for VIP transcript analysis in the biopsies of human EoE. Herein, we show that human eosinophils highly express VIP associated receptor CRTH2, not VAPC1 or VAPC2. Further, VIP mRNA and protein is induced in esophageal biopsies of human EoE compare to the normal individuals. Additionally, we show that in vitro VIP has a similar chemoattractant activity for eosinophils as eotaxin. Further, we show that in vivo CRTH2 expressed eosinophils accumulated around the VIP producing nerves in the esophageal biopsies of EoE patients. Interestingly, we also observed VIP receptor VPAC2 on mast cells and their accumulation near the nerve cells in EoE biopsies. Taken together, we show the significance of VIP and its receptors interaction in the recruitment of eosinophils and mast cells that may have an important role in promoting chronic EoE pathogenesis in human.
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- 2017
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79. Frozen section histology of margins facilitates one-step safe & cost-effective breast conservation surgery
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M. Sabaretnam, A. Agarwal, Alok Kumar Verma, Gaurav Agarwal, A. Mishra, C. Sonthineni, Gyan Chand, Sanjay Mishra, V. Agrawal, and Punita Lal
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medicine.medical_specialty ,Frozen section procedure ,Breast conservation ,business.industry ,medicine ,Surgery ,Histology ,General Medicine ,business - Published
- 2017
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80. Allergenicity assessment of genetically-modified tobacco expressing salt tolerance cbl gene
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Narendra Tuteja, Alok Kumar Verma, Mukul Das, Bhushan P. Chaudhari, Premendra D. Dwivedi, and Sandeep Kumar
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Crops, Agricultural ,Transgene ,Nicotiana tabacum ,Genetically modified crops ,Biology ,Immunoglobulin E ,chemistry.chemical_compound ,Mice ,In vivo ,Tobacco ,Animals ,Plant Immunity ,Plant Proteins ,Mice, Inbred BALB C ,fungi ,Computational Biology ,Salt Tolerance ,Allergens ,biology.organism_classification ,Plants, Genetically Modified ,Molecular biology ,In vitro ,Genetically modified organism ,chemistry ,Chemistry (miscellaneous) ,Immunoglobulin G ,Immunology ,biology.protein ,Histamine ,Food Science - Abstract
It is mandatory to assess the allergenic potential of genetically modified (GM) crops before their commercialization. Recently, a transgene [Calcineurin B-like (CBL) protein] has been introduced into tobacco plant to make the crop salt resistance. Therefore, it was felt necessary to assess the allergenic potential of the cbl gene product, which was introduced and expressed in Nicotiana tabacum (tobacco) plant and compared the allergenic effects with the wild-type (WT) counterpart. Bioinformatic analysis revealed that there was no significant sequence homology with known allergens. Also, no difference between the protein digestibility profiles of GM and WT tobacco was found. Rapid digestion of CBL protein (Mol Wt 35 kDa) by simulated gastric fluid (SGF) indicated reduced chances of this protein to induce allergenicity. In addition, BALB/c mice sensitized by intraperitoneal administration of WT and GM tobacco protein showed comparable levels of clinical score, specific IgE, IgG1, histamine level, similar effect on different organs as well as IgE binding proteins. These findings indicate that insertion of cbl gene in tobacco did not cause any additional allergic risk to consumer and the GM and native tobacco proteins behave similarly in both in vitro and in vivo situations even after genetic modification.
- Published
- 2014
81. Digital image watermarking scheme in wavelet domain using chaotic encryption
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Vinay Kumar Srivastava, Priyank Khare, and Alok Kumar Verma
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Discrete wavelet transform ,business.industry ,ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION ,Chaotic ,Watermark ,Image (mathematics) ,Wavelet ,Robustness (computer science) ,Computer vision ,Artificial intelligence ,Noise (video) ,Logistic map ,business ,Mathematics - Abstract
The rapid growth of digital technology in today's era leads to threat of destroying authentication and copyright protection of owners, so in this paper a Discrete Wavelet Transform based digital image watermarking scheme is proposed. Features of logistic map are able to generate a chaotic image pattern with the help of which embedding and extraction of watermark is performed. The proposed scheme also shows robustness and perceptual invisibility to various attacks such as filtering, JPEG compression, noise etc. Quality of image is being evaluated with NC and PSNR, which shows that the proposed scheme performs better.
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- 2014
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82. Contributors
- Author
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Ashok K. Adya, Neelesh Agarwal, Ashima Agarwal, Udita Agrawal, Vasco Azevedo, Ruby Bansal, Debmalya Barh, Mausumi Bharadwaj, Anant Narayan Bhatt, Manish Biyani, Madhu Biyani, Elisabetta Canetta, Vijender Chaitankar, Rakhi Chaturvedi, Sushmita Chaudhary, Sudhir Chowbina, D. Kar Chowdhuri, Madhumita Roy Chowdhury, Bhudev C. Das, Mukul Das, Surajit Das, Amrita Datta, Gautami Devi, Devyani Dube, Sudhisha Dubey, Bilikere S. Dwarakanath, Premendra D. Dwivedi, Rasha El Baz, R.K. Gaur, Preetam Ghosh, Madhu Gupta, Anuj Kumar Gupta, U.D. Gupta, Abhik Gupta, Showket Hussain, Pooja Jain, Anurag Jyoti, S.K. Kashyap, Zafar K. Khan, Fahim Halim Khan, Suchit Khanna, Mohammad Reza Khorramizadeh, Naveen Kumar, Sandeep Kumar, Satyendra Mohan Paul Khurana, Aruna Kumar, S. Maherchandani, Avinash Marwal, Shet Masih, Pawan Kumar Maurya, Ravi Mehrotra, Debasis Mondal, Koichi Nishigaki, Pravinkumar Purushothaman, K. Ravi Ram, Farshid Saadat, Anurag Kumar Sahu, Emmanuel O. Salawu, Rishi Shanker, Anchal Singh, Gulshan Singh, Iqram Govind Singh, Surinder Pal Singh, Mithilesh Singh, Neha Singh, Priyanka Srivastava, Richa Tripathi, Hitomi Tsuiji, Abhishek Tyagi, Kailash C. Upadhyaya, Mukesh Verma, Mudit Verma, Subhash Chandra Verma, Ashish S. Verma, Anju Verma, Poonam Verma, Vipin Verma, Alok Kumar Verma, Denys V. Volgin, Suresh P. Vyas, Dinesh K. Yadav, Neelam Yadav, Koji Yamanaka, and Eugenia Ch Yiannakopoulou
- Published
- 2014
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83. Safety Assessment of Food Derived from Genetically Modified Crops
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Alok Kumar Verma, Sandeep Kumar, Premendra D. Dwivedi, and Mukul Das
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Engineering ,education.field_of_study ,business.industry ,digestive, oral, and skin physiology ,Population ,A protein ,Food science ,Genetically modified crops ,business ,education ,Genetically modified organism ,Biotechnology - Abstract
Genetically modified foods are an essential requirement for the food demand of our ever-increasing population. Various approaches are available for assessing the safety of GM foods including the use of bioinformatics, examining the stability of a protein in the gastrointestinal tract, and allergenicity testing using animal models. This chapter explores the safety-related concerns about GM foods.
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- 2014
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84. Zinc oxide nanoparticles provide an adjuvant effect to ovalbumin via a Th2 response in Balb/c mice
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Mukul Das, Akanksha Sharma, Bhushan P. Chaudhari, Alok Kumar Verma, Premendra D. Dwivedi, Sandeep Kumar, Ruchi Roy, and Anurag Tripathi
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Ovalbumin ,medicine.medical_treatment ,Immunology ,Metal Nanoparticles ,Suppressor of Cytokine Signaling Proteins ,GATA3 Transcription Factor ,Immunoglobulin E ,Lymphocyte Activation ,BALB/c ,Mice ,Immune system ,Th2 Cells ,Antigen ,Adjuvants, Immunologic ,Aldesleukin ,medicine ,Splenocyte ,Immunology and Allergy ,Animals ,Humans ,Cells, Cultured ,Cell Proliferation ,B-Lymphocytes ,Mice, Inbred BALB C ,biology ,Macrophages ,Cell Differentiation ,General Medicine ,biology.organism_classification ,Molecular biology ,Up-Regulation ,Cytokine ,Suppressor of Cytokine Signaling 3 Protein ,Immunoglobulin G ,Dietary Supplements ,biology.protein ,Cytokines ,Female ,Zinc Oxide - Abstract
Zinc oxide nanoparticles (ZNPs) have been used in dietary supplements and may cause an immunomodulatory effect. The present study investigated the effect of ZNPs on antigen-specific immune responses in mice sensitized with the T-cell-dependent antigen ovalbumin (OVA). BALB/c mice were intraperitoneally administered ZNPs (0.25, 0.5, 1 and 3mg) once, in combination with OVA, and the serum antibodies, splenocyte reactivity and activation of antigen-presenting cells were examined. The serum levels of OVA-specific IgG1 and IgE were found significantly enhanced by treatment with ZNPs over control. An increased level of IL-2, IL-4, IL-6, IL-17 and decreased level of IL-10 and TNF-α in splenocytes administered with ZNPs were observed in comparison with control. The ZNPs and OVA-stimulated T lymphocytes showed enhanced proliferation compared with control. Macrophages and B cells showed high expression of MHC class II, whereas higher expression of CD11b in macrophages of the ZNPs and ZNPs/OVA treated groups was observed. The lungs and spleen had increased eosinophils and mast cell numbers. Also, myeloperoxidase activity in lungs was found to be increased by 2.5-fold in the case of ZNPs and 3.75-fold increase in ZNPs/OVA, whereas in intestine, there was significant increase in both the groups. Increased expression of the genes for GATA-3, SOCS-3, TLR-4, IL-13 and IL-5 in the intestine was observed. Collectively, these data indicate that systemic exposure to a single administration of ZNPs could enhance subsequent antigen-specific immune reactions, including the serum production of antigen-specific antibodies, and the functionality of T cells.
- Published
- 2013
85. Phaseolin: a 47.5kDa protein of red kidney bean (Phaseolus vulgaris L.) plays a pivotal role in hypersensitivity induction
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Ruchi Roy, Premendra D. Dwivedi, Dinesh Kumar, Akanksha Sharma, Swatantra Kumar Jain, Mukul Das, Anurag Tripathi, Alok Kumar Verma, Bhushan P. Chaudhari, Sandeep Kumar, and Giridhar Bh
- Subjects
Adult ,Male ,Immunology ,Spleen ,Immunoglobulin E ,chemistry.chemical_compound ,Mice ,Cell Line, Tumor ,medicine ,Immunology and Allergy ,Animals ,Humans ,Mast Cells ,Anaphylaxis ,Cells, Cultured ,Aged ,Plant Proteins ,Skin Tests ,Pharmacology ,Phaseolus ,Kidney ,Mice, Inbred BALB C ,biology ,Prostaglandin D2 ,Allergens ,biology.organism_classification ,Molecular biology ,beta-N-Acetylhexosaminidases ,Rats ,medicine.anatomical_structure ,Phaseolin ,chemistry ,Biochemistry ,Immunoglobulin G ,biology.protein ,Cytokines ,Female ,Histamine ,Ex vivo ,Food Hypersensitivity - Abstract
Red kidney bean (Phaseolus vulgaris L.), a protein rich legume, is consumed globally due to its delicacy. This study was aimed to purify, characterize and assess allergenicity of one of its clinically relevant allergens, later identified as phaseolin. This study was carried out using clinical, in vivo and ex vivo approaches. Phaseolin, an abundant protein of red kidney bean, was purified by column chromatography and reverse-phase-HPLC techniques and characterized by peptide mass fingerprinting. The IgE immunoblotting using red kidney bean allergic patients sera showed phaseolin as a major IgE binding protein of red kidney bean. Phaseolin treated mice demonstrated enhanced levels of specific IgE and IgG1, mouse mast cell protease-1, mRNA expressions of IL-4, IL-5, IL-13 and GATA-3 in the lungs, spleen and intestine along with anaphylactic symptoms indicative of allergic responses. Further, flow cytometry analysis and immunohistochemical studies indicated increased levels of IL-4, IL-5, IL-13 and GATA-3, respectively as compared to controls. The level of Foxp3 was found suppressed in the intestine of phaseolin treated mice when compared to the control. Further, phaseolin treated mice showed positive results in type 1 skin test. Bone marrow derived mast cells (BMMCs) and rat basophilic leukemia (RBL-2H3) cells showed enhanced release of allergic mediators like β-hexosaminidase, histamine, cysteinyl leukotrienes and prostaglandin D2. Taken together, phaseolin was found to possess characteristics of a potential allergen that may lead to hypersensitivity responses in the susceptible individuals and this may be one of the major proteins responsible for allergenicity of red kidney bean.
- Published
- 2013
86. Abstract 1452: IL-15 overexpression protects cerulein-induced fibrosis in the mouse model of chronic pancreatitis
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Anil Mishra, Murli Manohar, Sathisha Upparahalli Venkateshaiah, Alok Kumar Verma, and Chandrashekara Putanapura Mahadevappa
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Cancer Research ,medicine.medical_specialty ,business.industry ,medicine.medical_treatment ,Interleukin ,Cancer ,medicine.disease ,Pathogenesis ,Cytokine ,Endocrinology ,Oncology ,Fibrosis ,Interleukin 15 ,Internal medicine ,Medicine ,Pancreatitis ,business ,Saline - Abstract
Introduction: Earlier, interleukin (IL)-6, IL-8, IL-1β and IL-10 are implicated in the pathogenesis of pancreatitis. Recently, we observed reduced level of IL-15 in cerulein- induced acute and chronic mouse model of pancreatitis. IL-15 is a pleiotropic cytokine that has an important role in innate immunity. Therefore, we tested the hypothesis that IL-15 overexpression improves the pathogenesis of cerulein-induced pancreatitis. Experimental procedure: Accordingly, we tested our hypothesis by inducing chronic pancreatitis in rIL-15 pretreated Balb/c mice. Cerulein was given by repetitive intraperitoneal (i.p.) injections as reported earlier (50 μg/kg, 6 hourly injections/day, 3 days/week) along with the rIL-15 (5 μg in 100μl saline/ two-times/week/mice) for up to 4 weeks; the control mice received 100μl saline or saline with 5 μg IL-15. Mice were sacrificed 3 days after the last cerulein injection. Histopathological evaluation of H&E stained tissue sections was performed including tissue remodeling and the accumulation of collagen by Masson's trichrome stain in the tissue sections. Additionally, pro-inflammatory and pro-fibrotic gene i.e. TGF-β1, IL-6, IL-8, Collagen 1 and α-SMA levels were measured by ELISA, immunofluorescence, qPCR and immunoblot analysis. Summary: We report acinar cells atrophy, induced inflammatiory cells and cytokines in the pancreas of cerulein treated mice along with perivascular collagen deposition compare to saline treated mice. Interestingly, rIL-15 treated and cerulein given mice showed significantly improved morphology of acinar cells and reduced perivascular collagen. Further, we also report that protein levels of TGF-β1 and α-SMA is also reduced in the pancreas of cerulein injected and IL-15 treated mice compare to cerulein treated mice by performing western blot and immunohistochemistry. Conclusion: Our data show that IL-15 overexpression protects mice from cerulein-induced pancreatic pathogenesis including fibrosis. Taken together, rIL-15 therapy may be a novel strategy to treat pancreatic fibrosis, and may also helpful to treat pancreatic cancer patients by down-regulating tissue fibrogenesis. Funding: NIH R01 DK067255 (AM), NIH R01 AI080581 (AM), Citation Format: MURLI MANOHAR, SATHISHA UPPARAHALLI VENKATESHAIAH, CHANDRASHEKARA PUTANAPURA MAHADEVAPPA, ALOK KUMAR VERMA, ANIL MISHRA. IL-15 overexpression protects cerulein-induced fibrosis in the mouse model of chronic pancreatitis. [abstract]. In: Proceedings of the 107th Annual Meeting of the American Association for Cancer Research; 2016 Apr 16-20; New Orleans, LA. Philadelphia (PA): AACR; Cancer Res 2016;76(14 Suppl):Abstract nr 1452.
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- 2016
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87. Sa1483 A Protective Role of IL-15 in the Pathogenesis of Acute and Chronic Pancreatitis
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Anil Mishra, Chandrashekara Puthanapura Mahadevappa, Alok Kumar Verma, Sathisha Upparahalli Venkateshaiah, and Murli Manohar
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Pathogenesis ,Hepatology ,Interleukin 15 ,business.industry ,Immunology ,Gastroenterology ,Medicine ,Pancreatitis ,business ,medicine.disease - Published
- 2016
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88. Allergenicity potential of red kidney bean (Phaseolus vulgaris L.) proteins in orally treated BALB/c mice and passively sensitized RBL-2H3 cells
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Sandeep Kumar, Alok Kumar Verma, Swatantra Kumar Jain, Mukul Das, Bhushan P. Chaudhari, Premendra D. Dwivedi, and Akanksha Sharma
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Allergy ,Thymic stromal lymphopoietin ,Immunology ,Blotting, Western ,GATA3 Transcription Factor ,Biology ,Immunoglobulin E ,BALB/c ,Mice ,Random Allocation ,Th2 Cells ,Cell Line, Tumor ,medicine ,Animals ,Anaphylaxis ,Plant Proteins ,Phaseolus ,Kidney ,Mice, Inbred BALB C ,NFATC Transcription Factors ,Albumin ,food and beverages ,NFAT ,Th1 Cells ,biology.organism_classification ,medicine.disease ,Molecular biology ,beta-N-Acetylhexosaminidases ,Rats ,Specific Pathogen-Free Organisms ,medicine.anatomical_structure ,Proto-Oncogene Proteins c-maf ,biology.protein ,Female ,T-Box Domain Proteins ,Food Hypersensitivity - Abstract
Red kidney bean (Phaseolus vulgaris L.) is one the most commonly consumed legumes that requires an in depth understanding of its allergenicity. Therefore, the aim of this study was to explore the allergenicity of red kidney bean proteins following oral exposure in BALB/c mice and elucidate the levels of Th1/Th2 transcription factors induced by red kidney bean proteins in rat basophilic leukemia cells (RBL-2H3 cells) passively sensitized with the sera of red kidney bean sensitized mice. Red kidney bean proteins showed enhanced levels of total and specific IgE, anaphylactic symptoms, thymic stromal lymphopoietin (TSLP) and peritoneal albumin over control. Enhanced release of β-hexosaminidase along with up regulated expressions of GATA-3, STAT-6, T-bet, c-MAF and NFAT were observed in the RBL-2H3 cells exposed with red kidney bean proteins when compared to that of the controls. Taken together, exposure of red kidney bean proteins may cause allergic symptoms in mice and the ambivalent effect on Th2/Th1 transcription factors in RBL-2H3 cells.
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- 2012
89. Impact of thermal processing on legume allergens
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Alok Kumar Verma, Sandeep Kumar, Mukul Das, and Premendra D. Dwivedi
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Hot Temperature ,Chemistry ,Blanching ,business.industry ,Food Handling ,Steaming ,Pasteurization ,Fabaceae ,Allergens ,law.invention ,Chemistry (miscellaneous) ,law ,Food processing ,Working population ,Humans ,Food science ,Treatment costs ,business ,Legume ,Food Hypersensitivity ,Food Science ,Roasting ,Plant Proteins - Abstract
Food induced allergic manifestations are reported from several parts of the world. Food proteins exert their allergenic potential by absorption through the gastrointestinal tract and can even induce life threatening anaphylaxis reactions. Among all food allergens, legume allergens play an important role in induction of allergy because legumes are a major source of protein for vegetarians. Most of the legumes are cooked either by boiling, roasting or frying before consumption, which can be considered a form of thermal treatment. Thermal processing may also include autoclaving, microwave heating, blanching, pasteurization, canning, or steaming. Thermal processing of legumes may reduce, eliminate or enhance the allergenic potential of a respective legume. In most of the cases, minimization of allergenic potential on thermal treatment has generally been reported. Thus, thermal processing can be considered an important tool by indirectly prevent allergenicity in susceptible individuals, thereby reducing treatment costs and reducing industry/office/school absence in case of working population/school going children. The present review attempts to explore various possibilities of reducing or eliminating allergenicity of leguminous food using different methods of thermal processing. Further, this review summarizes different methods of food processing, major legumes and their predominant allergenic proteins, thermal treatment and its relation with antigenicity, effect of thermal processing on legume allergens; also suggests a path that may be taken for future research to reduce the allergenicity using conventional/nonconventional methods.
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- 2012
90. Phytohemagglutinins augment red kidney bean (Phaseolus vulgaris L.) induced allergic manifestations
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Mukul Das, Akanksha Sharma, Dinesh Kumar, Anurag Tripathi, Swatantra Kumar Jain, Alok Kumar Verma, Sandeep Kumar, Bhushan P. Chaudhari, and Premendra D. Dwivedi
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Biophysics ,chemical and pharmacologic phenomena ,Cross Reactions ,Immunoglobulin E ,Biochemistry ,chemistry.chemical_compound ,Mice ,Immune system ,Thymic Stromal Lymphopoietin ,Food allergy ,medicine ,Splenocyte ,Animals ,Phytohemagglutinins ,Anaphylaxis ,Lung ,Phaseolus ,Kidney ,Mice, Inbred BALB C ,biology ,Hemagglutination Tests ,medicine.disease ,beta-N-Acetylhexosaminidases ,Eosinophils ,medicine.anatomical_structure ,Jejunum ,chemistry ,Immunoglobulin G ,Immunology ,biology.protein ,Cytokines ,Female ,Prostaglandin D2 ,Rabbits ,Histamine ,Food Hypersensitivity ,Spleen - Abstract
Red kidney bean (Phaseolus vulgaris L.), a commonly consumed bean has been reported to induce allergic reactions in susceptible individuals. Phytohemagglutinins (PHAs, mainly PHA-P) contribute a major proportion of red kidney bean seeds. However, their roles in red kidney bean induced allergic reactions are still to be explored. This study was carried out to understand the role of PHAs in allergic manifestations using BALB/c mice and cultures of splenocyte, RBL-2H3 cells as well as bone marrow mast cells (BMMCs). Also, the characterization of allergic components from PHA-P was studied by LC-MS/MS. Enhanced levels of specific IgE and IgG1, clinical scores, cytokines and chemokines, β-hexosaminidase, histamine, cysteinyl leukotriene, prostaglandin D2 and abrupt histological changes in the intestine, lung and spleen indicated a pivotal role of PHA-P in red kidney bean allergy. Further, LC-MS/MS study revealed two IgE binding components of PHA-P as PHA-L and PHA-E. Enhanced specific IgE/IgG1 and β-hexosaminidase level elucidated the possible role of PHA-L and PHA-E in allergic manifestations. Furthermore, in the presence of IgE inhibitor piceatannol, reduced β-hexosaminidase release to some extent was noticed. The up regulated expression of GATA-3 and T-bet expression was observed in PHA-L as well as PHA-E groups. Taken together, this study revealed the fact that allergenicity potential of red kidney bean may get augmented due to the presence of different phytohemagglutinins. Biological significance Although food allergy is an immune provocation induced mainly by dietary allergenic protein components of the food, the role of dietary lectins in the food induced allergic manifestations cannot be ruled out. Here we provide the systematic evidences about the allergenic potential of PHAs and further disclosed the culprit components as PHA-L and PHA-E. It is an important finding that the PHA-L and PHA-E can cause allergic manifestations via not only the IgE mediated pathway but also the non-IgE mediated allergic reactions as evident by the Th1/Th2 cytokines and transcription factors. Further, the PHA-L seems to be more allergenic than the PHA-E. This article is part of a Special Issue entitled: Translational plant proteomics.
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- 2012
91. A molecular insight of CTLA-4 in food allergy
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Sandeep Kumar, Alok Kumar Verma, Mukul Das, and Premendra D. Dwivedi
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Lymphocyte ,T-Lymphocytes ,Immunology ,Provocation test ,Immunoglobulin E ,Immune system ,Food allergy ,medicine ,Immunology and Allergy ,Animals ,Humans ,CTLA-4 Antigen ,Interleukin-13 ,biology ,business.industry ,medicine.disease ,medicine.anatomical_structure ,CTLA-4 ,Interleukin 13 ,biology.protein ,Interleukin-4 ,business ,Anaphylaxis ,Food Hypersensitivity - Abstract
Food allergy is an immune provocation induced by certain food in susceptible individuals. Most of the food allergic manifestations are evident in the individual having impaired oral tolerance. In spite of worldwide prevalence, there is no permanent cure of food allergy. Food allergic reactions are complex immunological events that comprises of several immune molecules like IgE, IL-4, IL-13 and T-cells, therefore, researchers are trying to pick the correct molecule to find out pivotal therapeutic solutions. Being a key regulatory molecule in suppressing T-cells functional activities, cytotoxic T-cell lymphocyte antigen-4 (CTLA-4) or cluster of differentiation-152 (CD-152) has contributed a novel and revolutionary dimension toward therapeutic research of several diseases. This review focuses on different immunological and mechanistic perspectives of CTLA-4 in correlation with food allergy.
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- 2012
92. Safety evaluation of genetically modified mustard (V4) seeds in terms of allergenicity: comparison with native crop
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Amita Misra, Nidhi P Chanana, Sandeep Kumar, Mukul Das, Alok Kumar Verma, Vibha Dhawan, and Premendra D. Dwivedi
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Male ,Food, Genetically Modified ,Genetically modified crops ,Pharmacology ,Immunoglobulin E ,chemistry.chemical_compound ,Mice ,Prevalence ,Carotenoid ,chemistry.chemical_classification ,Mice, Inbred BALB C ,Middle Aged ,Plants, Genetically Modified ,Genetically modified organism ,Seeds ,Female ,Histamine ,Biotechnology ,Mustard Plant ,Adult ,Crops, Agricultural ,medicine.medical_specialty ,Adolescent ,Immunoblotting ,Biology ,Genes, Plant ,Crop ,Food allergy ,medicine ,Hypersensitivity ,Animals ,Humans ,Anaphylaxis ,business.industry ,Computational Biology ,Allergens ,medicine.disease ,Pepsin A ,Mutagenesis, Insertional ,chemistry ,Immunoglobulin G ,biology.protein ,Histopathology ,business ,Agronomy and Crop Science ,Food Science ,Densitometry - Abstract
Genetically modified (GM) mustard line (V4) with increased carotenoid content was compared with native mustard to find the difference in allergenic potential, if any. Simulated gastric fluid (SGF) digestibility of crude protein extract from GM as well as its native counterpart mustard crop was envisaged to understand the intended or unintended changes in GM crop along with IgE immunoblotting. BALB/c mice were used as model for allergenicity studies for monitoring total and specific IgE, specific IgG1, histamine level, histopathology, and systemic anaphylaxis score. Allergenicity of mustard was checked in humans by clinical history, skin prick test and IgE levels. Similar results were evident by significant increase in total IgE, specific IgE, IgG1, histamine levels, in GM and native mustard in comparison to control group. Prominent anaphylactic symptoms (score 2: 60%; score 3: 20%; score 4: 20% in native mustard and score 2: 40%; score 3: 40%; score 4: 20% in GM mustard) and eruptive histopathological changes were observed in both GM and native mustard when compared with controls. One protein of approximately 16 kDa was found stable up to 1 h in both GM as well as non GM mustard. IgE immunoblotting detected three protein components of approximately 29, 24 and 16 kDa in both GM and non GM varieties. Collectively, our data demonstrate substantially equivalent allergic responses against GM as well as its native counterpart. Therefore, the GM mustard may be as safe as its native counterpart with reference to allergenic responses.
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- 2012
93. A comprehensive review of legume allergy
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Mukul Das, Premendra D. Dwivedi, Sandeep Kumar, and Alok Kumar Verma
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Allergy ,Biology ,Cross Reactions ,medicine.disease_cause ,Cross-reactivity ,Crop ,Profilins ,medicine ,Immunology and Allergy ,Storage protein ,Animals ,Humans ,Legume ,chemistry.chemical_classification ,Order Fabales ,food and beverages ,Hypoallergenic ,Fabaceae ,General Medicine ,Allergens ,medicine.disease ,Diet ,chemistry ,Agronomy ,Food Hypersensitivity - Abstract
Legumes belonging to Fabaceae family of the order Fabales are a rich and important source of proteins and many essential elements. Due to its nutritious elements, these are preferably included in human diet in most part of the world. But, unfortunately, IgE binding proteins have been identified in majority of legumes, and allergenic response to these legumes may range from mild skin reactions to life-threatening anaphylactic reaction. Overall, allergenicity due to consumption of legumes in decreasing order may be peanut, soybean, lentil, chickpea, pea, mung bean, and red gram. So far, several allergens from different legumes have been identified and characterized. Most of identified allergens belong to storage proteins family, profilins, or the pathogenesis-related proteins. Legumes also have property of immunological cross-reactivity among themselves and from other sources that also increases the severity of allergenic response to a particular legume. This review summarizes the currently available knowledge on legume allergy and describes the allergenic problems associated with different legumes. It also tries to explore about the legume allergens identified so far by different scientific groups. The culmination of knowledge about identification and characterization of allergens from different legumes will be helpful in diagnosis and treatment of allergy, for development of novel therapeutic strategies, for strict avoidance of particular legume in diet by susceptible individual and also to produce hypoallergenic cultivars of leguminous crop through conventional breeding or genetic modification.
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- 2012
94. Molecular mechanisms of IgE mediated food allergy
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Premendra D. Dwivedi, Mukul Das, Alok Kumar Verma, and Sandeep Kumar
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Allergy ,Immunology ,Antigen presentation ,Immunoglobulin E ,Cell Degranulation ,chemistry.chemical_compound ,Food allergy ,medicine ,Immunology and Allergy ,Animals ,Humans ,Anaphylaxis ,Pharmacology ,Antigen Presentation ,biology ,Chemistry ,FCER1 ,Toll-Like Receptors ,Degranulation ,Allergens ,medicine.disease ,Gene Expression Regulation ,biology.protein ,Cytokines ,Inflammation Mediators ,Histamine ,Food Hypersensitivity ,Signal Transduction ,Transcription Factors - Abstract
The purpose of this review is to collate current knowledge and recent advances in molecular mechanism behind the immediate type hypersensitivity of foods. Food allergy is a growing concern of human health in developed as well as developing countries now days. Food allergic reactions are mostly IgE mediated and also known as immediate type hypersensitivity or type I reaction. This review encompasses a wide range of molecular events during IgE mediated reactions like primary exposure of allergens, processing of allergens by antigen presenting cells, role of transcription factors like GATA-3, STAT-6, NF-AT, c-maf, c-kit and NF-κB, Treg cells, toll like receptors, cytokines and chemokines, class switch to IgE, FceR1 receptor, priming of IgE on mast cells or basophils, signaling events followed by secondary exposure of allergens, degranulation and release of mediators like leukotrienes, histamines, prostaglandins, β-hexosaminidase and ultimately anaphylaxis. This review may be helpful to beginners as well as experts working in the field of allergy and immunology because of the stepwise explanations of molecular mechanisms involved in IgE mediated reactions.
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- 2012
95. Bt brinjal in India: a long way to go
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Sandeep Kumar, Alok Kumar Verma, Kausar M. Ansari, Premendra D. Dwivedi, Amita Misra, Mukul Das, Anurag Tripathi, and Ruchi Roy
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Substantial equivalence ,business.industry ,fungi ,Pest control ,Bacillus thuringiensis ,food and beverages ,India ,General Medicine ,Genetically modified crops ,Pesticide ,Bt brinjal ,Biology ,Plants, Genetically Modified ,Genetically modified organism ,Biotechnology ,Biosafety ,Bacterial Proteins ,Agriculture ,Animals ,Solanum melongena ,business ,Pest Control, Biological - Abstract
Brinjal occupies the major proportion amongst all vegetable crops in India and is vulnerable to many diseases caused by insect-pests, fungus, bacteria and virus. Brinjal production is extensively affected by the insect brinjal fruit and shoot borer. Use of conventional chemical pesticides not only damage environment including the biotic and abiotic components but, also affect human health. Bt Brinjal was developed to combat brinjal fruit and shoot borer that has an advantage minimizing use of chemical pesticides. Extensive biosafety investigations, nutritional studies, substantial equivalence studies, relative toxicity and allergenicity assessment using animal models like Sprague Dawley rats, Brown Norway rats, rabbit, fish, chicken, goats, etc. revealed no significant differences between genetically modified brinjal and its native counterpart. Bt brinjal could effectively control the target pest and was found to be safe for environment and human health. In spite of all the scientific studies, release of Bt Brinjal has been put under moratorium. Indian government has constituted an expert committee to address this issue. In this review we have tried to explore the facts related to Bt Brinjal including its production, use of Bt toxin, use of chemical pesticides in controlling the FSB in native brinjal, along with perspective of public opinion and government initiatives. Key words: Bt Brinjal, agriculture, insecticides, GM foods, agrobacterium, transgenic crops.
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- 2011
96. Abstract P3-01-06: Sentinel lymph node biopsy after NACT: Results of a validation study in large/locally advanced breast cancer patients
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Amit Agarwal, Anand K Mishra, N Kumari, Subhash Chand Kheruka, Gyan Chand, Alok Kumar Verma, Narendra Krishnani, Sanjay Mishra, Vinita Agrawal, Gaurav Agarwal, Sanjay Gambhir, Sendhil Rajan, M. Sabaretnam, and Punita Lal
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Cancer Research ,medicine.medical_specialty ,business.industry ,medicine.medical_treatment ,Sentinel lymph node ,Cancer ,medicine.disease ,Surgery ,Radiation therapy ,Axilla ,medicine.anatomical_structure ,Breast cancer ,Oncology ,Medicine ,Radiology ,Stage (cooking) ,business ,Triple-negative breast cancer ,Mastectomy - Abstract
Background: Sentinel lymph node biopsy (SLNB) is the current standard of care for surgical staging of clinically node negative axilla (N0) early breast cancer patients undergoing primary surgery. SLN- identification rate (IR) of 90% and SLN- false negative rate (FNR) of 10% are considered minimum acceptable indices for SLNB. Its role in staging axillae in patients undergoing post-NACT surgery is somewhat unclear. In India, and most low-and-middle income countries, large operable breast cancers (LOBC) and locally advanced breast cancers (LABC) constitute a large proportion of breast cancer patients treated. These patients are usually are treated with NACT, followed by surgery and radiation therapy. In a prospective validation SLNB study, we investigated the accuracy of SLNB in staging post-NACT N0 axilla in a patient cohort that were LOBC or LABC at the time of initial presentation. Methods: Hundred consenting non-inflammatory LOBC/LABC patients (mean age 49.3+8.6; index stage T3,N0-1=21; T4b,N0-1=33; T1-3,N2a=24; T4b,N2a=22) who were N0 after NACT at time of surgery (Breast conservation surgery in 19, Mastectomy in 81) were included. Majority had Infiltrating ductal carcinoma (n=87), and grade II/III tumors (n=93); 45 were hormone receptor positive (+), 29 had HR negative (-) HER2(+); and 26 had triple negative breast cancer on IHC sub-typing. Commonest NACT regimen used was Anthracycline followed by taxanes in 83. SLNB was performed using low-cost methylene-blue and 99mTc-Antimony-colloid, which were produced in-house using well standardized protocols, with clearance of the institutional ethics committee. Irrespective of the SLN histology, a complete axillary dissection (ALND) was carried out in all. SLN-IR and SLN-FNR were calculated, comparing the histological status of the SLN and the ALND specimen. Factors predicting non-identified SLN and false negative SLN were evaluated in uni-variate and multi-variate analysis. Results: With a combination of methylene blue dye and radiopharmaceutical, the SLN-IR was 81%. Mean number of SLN removed was 2.4+/-1.02. Mean number of nodes removed at ALND was 13.3+/-2.2. SLN-IR varied significantly (p Conclusions: Considering SLN-IR of 90% and SLN-FNR of 10% as acceptable standards, SLNB in post-NACT N0 patients undergoing surgery was not found robust in staging the axilla, with the exception of patients with index stage T3,N0-1 who had SLN-IR of 90.4% and SLN-FNR of 8.3%. Patients with (pre-NACT) skin involvement(T4b), matted axillary nodes(N2a) and LVI are fraught with high-risk of non-identification and false-negative SLNB. Citation Format: Agarwal G, Gambhir S, Lal P, Rajan S, Krishnani N, Mishra A, SabaRetnam M, Agarwal A, Chand G, Verma AK, Mishra SK, Kumari N, Agrawal V, Kheruka SC. Sentinel lymph node biopsy after NACT: Results of a validation study in large/locally advanced breast cancer patients. [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr P3-01-06.
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- 2016
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97. Novel Noninvasive Biomarker for Eosinophilic Esophagitis (EoE)
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Sathisha Upparahalli Venkateshaiah, Chandrashekara Puthanapura Mahadevappa, Alok Kumar Verma, Anil Mishra, Murli Manohar, and Jochen Mattner
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Pathology ,medicine.medical_specialty ,business.industry ,Immunology ,medicine ,Immunology and Allergy ,Eosinophilic esophagitis ,medicine.disease ,business ,Noninvasive biomarkers - Published
- 2016
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98. Misalignment fault detection in induction motor using rotor shaft vibration and stator current signature analysis
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Somnath Sarangi, Maheshkumar H. Kolekar, and Alok Kumar Verma
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Engineering ,Stator ,business.industry ,Rotor (electric) ,Mechanical Engineering ,Fault (power engineering) ,Industrial and Manufacturing Engineering ,Fault detection and isolation ,law.invention ,Vibration ,Control theory ,Electromagnetic coil ,law ,Orbit (dynamics) ,Electrical and Electronic Engineering ,business ,Induction motor - Abstract
In any rotating machine one of the most common faults is misalignment. Misalignment in any machine decreases the efficiency of that machine in short run. In long run process it may cause failure because of unnecessary vibration, gives stresses on motor and bearings and also danger of short circuiting in stator and rotor windings. In almost all the previous literatures, only the use of vibration information for the misalignment has been discussed. In this paper inspection of misalignment is done by using diagnostic medium such as rotor vibration as well as stator current. The vibration and the current signals are obtained for parallel, angular and the combination of both the misalignments. FFT was carried out for the obtained responses to investigate the fault. To show the uniqueness of misalignment fault orbit plot of vibrations spectra are used.
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- 2013
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99. Oil whip detection using stator current monitoring
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Alok, Kumar Verma, primary, Somnath, Sarangi, additional, Mahesh, Kolekar, additional, and Shreya, Banerjee, additional
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- 2012
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100. The biological potential of flavones.
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Alok Kumar Verma and Ram Pratap
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FLAVONOIDS , *PHARMACEUTICAL chemistry , *BOTANICAL chemistry , *PHYTOCHEMICALS - Abstract
Covering: 1990 to 2009 [ABSTRACT FROM AUTHOR]
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- 2010
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