17 results on '"Sachan V"'
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2. Neutron diffraction study of stripe order in La(2)NiO(4+d) with d=2/15
- Author
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Wochner, P., Tranquada, J. M., Buttrey, D. J., and Sachan, V.
- Subjects
Condensed Matter - Strongly Correlated Electrons - Abstract
We report a detailed neutron scattering study of the ordering of spins and holes in oxygen-doped La(2)NiO(4.133). The single-crystal sample exhibits the same oxygen-interstitial order but better defined charge-stripe order than that studied previously in crystals with d = 0.125. In particular, charge order is observed up to a temperature at least twice that of the magnetic transition, T_m = 110.5 K. On cooling through T_m, the wave vector \epsilon, equal to half the charge-stripe density within an NiO(2) layer, jumps discontinuously from 1/3 to 0.2944. It continues to decrease with further cooling, showing several lock-in transitions on the way down to low temperature. To explain the observed lock-ins, a model is proposed in which each charge stripe is centered on either a row of Ni or a row of O ions. The model is shown to be consistent with the l-dependence of the magnetic peak intensities and with the relative intensities of the higher-order magnetic satellites. Analysis of the latter also provides evidence that the magnetic domain walls (charge stripes) are relatively narrow. In combination with a recent study of magnetic-field-induced effects, we find that the charge stripes are all O-centered at T>T_m, with a shift towards Ni centering at T
- Published
- 1997
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3. Study on the Socioeconomic Profile and Knowledge Level of Farm Women about Soybean Processing Techniques
- Author
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Arya, Manisha, Sachan, V K, Nautiyal, Pankaj, and Papnai, Gaurav
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- 2018
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4. Dystocia due to bilateral hock flexion in a jenny (Equus Asinus)
- Author
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Sachan, V., Kumar, B., Saxena, A., and Chaudhary, M.K.
- Published
- 2019
5. Effect of the Addition of Insulin Like Growth Factor-I (IGF-I) on Cryopreservation of Hariana Bull Semen.
- Author
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Singh, G. V., Kumar, A., Sachan, V., Agrawal, J. K., and Saxena, A.
- Subjects
FROZEN semen ,SEMEN ,INSULIN ,BULLS ,EGG yolk ,SPERMATOZOA - Abstract
This experiment was designed to study the effect of insulin like growth factor-I (IGF-I) on cryopreservation of Hariana bull semen. For this purpose, semen ejaculates were collected from four Hariana bulls using artificial vagina at biweekly interval. The semen samples which possess more than 70% initial progressive motility and above 500 million/mL spermatozoa concentration was subsequently subjected to processing for experiment. Semen samples were extended in egg yolk tris glycerol (EYTG) extender and split into four groups. IGF-I was added at 50 ng/80 × 10
6 spermatozoa, 100 ng/80 × 106 spermatozoa and 150 ng/80 × 106 spermatozoa in the group II, III, IV respectively and group I as control (without IGF-I). Semen samples were evaluated at pre-freeze and post-thaw stage for percent individual progressive motility, percent live spermatozoa, percent hypo-osmotic swelling (HOS) positive spermatozoa, percent spermatozoa with intact acrosome. A significant (P<0.05) higher individual progressive motility, viability, HOS response and acrosomal integrity was observed at pre-freeze and post-thaw stage by using 150 ng/ml IGF-I. Concentration of 150 ng/mL IGF-I was found to be more beneficial in cryopreservation of Hariana bull spermatozoa as evidenced by post-thaw seminal parameter. It was concluded that IGF-I can be added to extender for improving cryosurvial of Hariana bull spermatozoa. [ABSTRACT FROM AUTHOR]- Published
- 2020
6. Methods of Embryo Sexing in Cattle Breeding: A Review.
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Sachan, V., Kumar, B., Agrawal, J. Kumar, Kumar, A., and Saxena, A.
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CATTLE breeding , *SEXING of animals , *EMBRYOS , *LIVESTOCK breeds , *BEEF industry , *CONCEPTION , *ANIMAL offspring sex ratio - Abstract
Different livestock sectors as beef industries get benefit from the production of male animals while dairy industries get benefit from the milk production by the female animals. Therefore, it is obvious need to produce the animals of desired sex which can be achieved by predetermining the sex of conceptus at the time of conception i.e. pre determination of sex may be of great economic importance. Control of the sex ratio by sex prediction of the of pre implanted embryo would be beneficial not only in relation to the aspect of management, production and breeding programmes of livestock but also in diagnosing the genetic disorders at prenatal stage. Pre-implantation sexing of embryos not only improves efficiency of embryo transfer but also facilitate the transfer of embryos of desired sex. Sex-sorted sperm is a one of the technique fulfilling the requirement but it is well expensive and less efficient. Another concept of getting genetically improved animals of desired sex is embryo sexing. Embryo sexing has great potential to maximize the efficiency of dairy production through controlling the sex ratio of domestic species. There are many methods to determine the sex of embryo categorized as invasive and non-invasive techniques with varying efficiency and merits. [ABSTRACT FROM AUTHOR]
- Published
- 2020
7. Effect of Supplementing Mineral Mixture Daily on Body Weight Gain in Male Goats
- Author
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Tiwari, R K, primary, Sachan, V K, additional, Singh, N K, additional, Nautiyal, Pankaj, additional, Papnai, Gaurav, additional, and Gupta, J P, additional
- Published
- 2014
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8. Thyroidal Hormonal Changes During and After Head and Neck Irradiation.
- Author
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Shukla, A K., Hazra, D. K., Das, B. K., Sewatkar, A. B., Rohtagi, V. K., and Sachan, V. K.
- Published
- 1988
9. A case of breast tumor in a male with complete androgen insensitivity.
- Author
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Chokkapu Sr., Srinivas Rao, Suresh, Alok Sachan V., Kumar, P. Satish, and Rukmangadha, N.
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ANDROGENS , *INTERSEXUALITY , *SEX chromatin , *GENITALIA , *PUBIC hair , *PAPILLOMA , *MENARCHE - Abstract
Introduction: Androgen insensitivity (testicularfeminization) syndrome is a rare inherited form of male pseudohermaphroditism that occurs in phenotypically normal woman with adequate breast development, normal external genitalia, a vagina of variable depth, absent uterus, and sparse or absent pubic hair and axillary hair. These patients have male karyotype (XY) and negative sex chromatin. The gonad (undescended testes) may be intra-abdominal, inguinal, or labial. The probable explanation of the syndrome is the absence of the cytosolic androgen binding protein receptor that is normally present in the androgen responsive tissue. Case Report: A 17-year-old female presented with chief complaints of not attaining menarche and swelling in left breast. She was operated outside for this swelling. Physical examination revealed normal breast development, normal external gelia, sparse pubic hair, absent axillary hair, and bilateral inguinal masses. Ultrasonography (USG nita) of the abdomen showed absent uterus and ovaries in the pelvis. Subsequent cytogenetic analysis confirmed 46 XY karyotype. Review of the histopathological examination of the excised breast tissue was suggestive of multiple papilloma with hyperplasia of unusual type and immunohistochemistry markers positive for ck-5, p63, and actin. Conclusion: Cancer of breast is rare in males, but the risk is increased in those with androgen hypoinsensitivity caused by longer glutamine repeats in the androgen receptor (AR) seen with partial androgen insensitivity syndromes (PAIS) or mild androgen insensitivity syndromes (MAIS). Breast cancer has not been reported in complete androgen insensitivity syndromes (CAIS). The above case report illustrates a rare presentation of breast papilloma with hyperplasia of unusual type in a male with complete androgen insensitivity syndrome. [ABSTRACT FROM AUTHOR]
- Published
- 2013
10. Evaluation of the Effectiveness of Telemedicine in Postoperative Follow-Up Care After Dental Implant Surgery. A Pilot Study.
- Author
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Patel PK, Shukla AK, Sachan V, Sharma P, Singh S, Saxena S, and Makkad RS
- Abstract
Aim: Telemedicine has emerged as a potential solution to enhance postoperative follow-up care after dental implant surgery, offering the convenience of remote monitoring and reduced need for in-person visits., Materials and Methods: Participants were randomly assigned to either the telemedicine group (n = 15) or the in-person group (n = 15). In the telemedicine group, patients received remote follow-up care through virtual consultations, during which they could communicate their concerns and share images of the surgical site. The in-person group received standard in-person follow-up visits. Patient satisfaction was measured using a standardized survey, with responses collected on a Likert scale., Results: Telemedicine group exhibited comparable levels of patient satisfaction (mean satisfaction score ± standard deviation: 4.6 ± 0.3) to the in-person group (4.7 ± 0.2). Moreover, clinical outcomes, including wound healing assessment, were similar between the two groups. No significant differences were observed in the incidence of postoperative complications or the need for additional interventions., Conclusion: In conclusion, this pilot study demonstrates that telemedicine is an effective alternative to traditional in-person follow-up care for postoperative dental implant surgery patients. It offers comparable patient satisfaction and clinical outcomes while proving to be more cost-effective., Competing Interests: There are no conflicts of interest., (Copyright: © 2023 Journal of Pharmacy and Bioallied Sciences.)
- Published
- 2024
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11. Proprotein convertase 7 (PCSK7) reduces apoA-V levels.
- Author
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Ashraf Y, Duval S, Sachan V, Essalmani R, Susan-Resiga D, Roubtsova A, Hamelin J, Gerhardy S, Kirchhofer D, Tagliabracci VS, Prat A, Kiss RS, and Seidah NG
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- Animals, Apolipoprotein A-V blood, Cell Line, Tumor, Endoplasmic Reticulum metabolism, Hepatocytes metabolism, Humans, Lysosomes metabolism, Mice, Inbred C57BL, Mice, Knockout, Polymorphism, Single Nucleotide, Subtilisins metabolism, Triglycerides blood, Exome Sequencing methods, Apolipoprotein A-V metabolism, Liver metabolism, Subtilisins genetics, Triglycerides metabolism
- Abstract
The locus of the human proprotein convertase subtilisin-kexin type-7 (PC7) gene (PCSK7) is on chromosome 11q23.3 close to the gene cluster APOA5/APOA4/APOC3/APOA1, a region implicated in the regulation of lipoprotein metabolism. A GWAS reported the association of PCSK7 SNPs with plasma triglyceride (TG), and exome sequencing of African Americans revealed the association of a low-frequency coding variant of PC7 (R504H; SNP rs142953140) with a ~ 30% TG reduction. Another PCSK7 SNP rs508487 is in linkage disequilibrium with a promoter variant of the liver-derived apolipoprotein A-V (apoA-V), an indirect activator of the lipoprotein lipase (LpL), and is associated with elevated TG levels. We thus hypothesized that PC7 regulates the levels/activity of apoA-V. Studies in the human hepatic cell line HuH7 revealed that wild-type (WT) PC7 and its endoplasmic reticulum (ER)-retained forms bind to and enhance the degradation of human apoA-V in acidic lysosomes in a nonenzymatic fashion. PC7-induced degradation of apoA-V is inhibited by bafilomycin A1 and the alkalinizing agents: chloroquine and NH
4 Cl. Thus, the PC7-induced apoA-V degradation implicates an ER-lysosomal communication inhibited by bafilomycin A1. In vitro, the natural R504H mutant enhances PC7 Ser505 phosphorylation at the structurally exposed Ser-X-Glu507 motif recognized by the secretory kinase Fam20C. Co-expression of the phosphomimetic PC7-S505E with apoA-V resulted in lower degradation compared to WT, suggesting that Ser505 phosphorylation of PC7 lowers TG levels via reduced apoA-V degradation. In agreement, in Pcsk7-/- mice fed high-fat diet, plasma apoA-V levels and adipocyte LpL activity are increased, providing an in vivo mechanistic link for a role of liver PC7 in enhanced TG storage in adipocytes., (© 2020 Federation of European Biochemical Societies.)- Published
- 2020
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12. HIV-induced neuroinflammation: impact of PAR1 and PAR2 processing by Furin.
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Sachan V, Lodge R, Mihara K, Hamelin J, Power C, Gelman BB, Hollenberg MD, Cohen ÉA, and Seidah NG
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- Animals, CHO Cells, Cricetulus, HEK293 Cells, HIV Infections virology, Humans, Inflammation metabolism, Neurocognitive Disorders metabolism, Transfection, Furin metabolism, HIV Infections metabolism, HIV-1 metabolism, Inflammation virology, Neurocognitive Disorders virology, Receptor, PAR-1 metabolism, Receptor, PAR-2 metabolism
- Abstract
HIV-associated neurocognitive disorders (HAND) is a syndrome defined by neurocognitive deficits that are driven by viral neurotoxins, cytokines, free radicals, and proteases expressed in the brain. This neurological disease has also been linked to activation of Protease-Activated Receptors 1 and 2 (PAR1,2). These receptors are highly expressed in the central nervous system and are upregulated in HAND. Secretory basic-amino-acid-specific Proprotein Convertases (PCs), which cleave precursor proteins at basic residues, are also induced in HAND. They are vital for many biological processes including HIV-1 entry into cells. The cytoprotective role of Furin, PC5, and PACE4 has been linked to the presence of a potential PC-cleavage site R
41 XXXXR46 ↓ in PAR1. Furthermore, Furin binds PAR1 and both are trapped in the trans-Golgi-network (TGN) as inactive proteins, likely due to the intermediary trafficking role of phospho-Furin acidic cluster sorting protein 1 (PACS1). Nothing is known about PAR2 and its possible recognition by PCs at its putative R31 XXXXR36 ↓ processing site. The present study implicates PACS1 in the retrograde trafficking of PAR1 to the TGN and demonstrates that the cytosolic extreme C-terminal tail of PAR1 contains an acidic phosphorylatable PACS1-sensitive domain. We further show the requirement of Asn47 in PAR1 for its Furin-dependent TGN localization. Our data revealed that Furin is the only convertase that efficiently cleaves PAR2 at Arg36 ↓. N-glycosylation of PAR2 at Asn30 reduces the efficacy, but enhances selectivity of the Furin cleavage. Finally, in co-cultures comprised of human neuroblastoma SK-N-SH cells (stably expressing PAR1/2 and/or Furin) and HIV-1-infected primary macrophages, we demonstrate that the expression of Furin enhances neuronal cell viability in the context of PAR1- or PAR2-induced neuronal cytotoxicity. The present study provides insights into early stages of HIV-1 induced neuronal injury and the protective role of Furin in neurons co-expressing PAR1 and/or PAR2, as observed in HAND.- Published
- 2019
- Full Text
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13. Triple receptor-positive primary neuroendocrine carcinoma of breast in a young patient.
- Author
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Vats M, Sachan V, Prajapati S, and Mandal S
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- Adult, Female, Humans, Receptor, ErbB-2 analysis, Receptors, Estrogen analysis, Receptors, Progesterone analysis, Breast Neoplasms chemistry, Carcinoma, Neuroendocrine chemistry
- Abstract
Primary neuroendocrine carcinoma of breast is a very rare malignancy and preoperative diagnosis is difficult by clinical examination alone.Most oftenly, histopathological examination (HPE) and immunohistochemistry (IHC) studies are required to establish the diagnosis. We describe here a case of a primary neuroendocrine carcinoma of right breast in a 32-year-old woman. The patient underwent a right modified radical mastectomy, and the diagnosis was conclusively established postoperatively by the HPE and IHC reports. The IHC report revealed positive status of oestrogen, progesterone and Herceptin receptors., Competing Interests: Competing interests: None declared., (© BMJ Publishing Group Ltd (unless otherwise stated in the text of the article) 2018. All rights reserved. No commercial use is permitted unless otherwise expressly granted.)
- Published
- 2018
- Full Text
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14. Ultrasound as a point-of-care tool for early detection of potential complications like pneumothorax associated with the pectoralis block.
- Author
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Tewari S, Dhiraaj S, Sachan V, Bhargava T, and Verma A
- Abstract
Competing Interests: There are no conflicts of interest.
- Published
- 2017
- Full Text
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15. Thrombin activation of protein C requires prior processing by a liver proprotein convertase.
- Author
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Essalmani R, Susan-Resiga D, Guillemot J, Kim W, Sachan V, Awan Z, Chamberland A, Asselin MC, Ly K, Desjardins R, Day R, Prat A, and Seidah NG
- Published
- 2017
- Full Text
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16. A Novel and Innovative Way of Nasogastric Tube Insertion in Anesthetized Intubated Patient.
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Sahu S, Kishore K, Sachan V, and Chatterjee A
- Abstract
Nasogastric tube (NGT) placement in anesthetized and intubated is sometimes very challenging with more than 50% failure rate in the first attempt. We describe a newer innovative Sahu's three in one, technique with use of GlideScope and forward placement of intubated trachea by external laryngeal maneuver, these both techniques lead to separation of trachea from esophagus so that endoscopic jejunal feeding tube guide wire strengthen NGT can be guided and manipulated to esophagus under direct vision. After informed consent, we used Sahu's three in one combo technique to insert NGT in adult anesthetized and intubated patients of both the sexes with high success in the first attempt. We found this technique easy, helpful, less time consuming with high success rate., Competing Interests: There are no conflicts of interest.
- Published
- 2017
- Full Text
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17. Timed wake-up anaesthesia in hand: A modification to wide awake surgery of hand.
- Author
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Kamath J, Shenoy T, Jayasheelan N, Rizwan N, Sachan V, and Danda R
- Abstract
Introduction: Wide awake surgery of the hand (WASH) is a well-accepted technique in hand surgery which allows the surgeon to identify and rectify on the table of some of the inadvertent shortcomings in the surgical procedures to optimise the final outcome. The advantage, however, precludes the use of tourniquet. We describe a modified method which preserves all the advantages of WASH and allows the surgeon to use tourniquet., Patients and Methods: Thirty-one cases of hand surgeries were carried out using the modified technique where a wrist block was supplemented with the ultra-short acting intravenous propofol which allowed the surgeon to use the upper arm tourniquet. The propofol infusion was stopped, and the tourniquet was released after the important surgical step. Within an average of 10 min of stoppage of the infusion, all the patients were awake for active intraoperative painless movements to aid the surgeon to identify, rectify and fine tune the procedure to optimise the results., Results: Five of the 31 patients needed correction based on the intraoperative movements. All the 31 patients were pain free at the surgical site during surgery. All the 31 patients were cooperative enough to perform full range of pain-free intraoperative movements. No patient experienced significant tourniquet pain during the procedure. Patient's and surgeon's satisfaction at the end of the procedure has been quite satisfactory., Conclusion: Timed wake-up anaesthesia, an improvement over the original WASH, has been suggested where the surgeon can add without subtracting the benefits of the procedure in the form of usage of the tourniquet providing the clear tissue plane and haemostasis during the surgery. However, an additional cost is incurred for the use of anaesthesia and equipment should be kept in mind., Competing Interests: There are no conflicts of interest.
- Published
- 2016
- Full Text
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