107 results on '"Sadaf Ilyas"'
Search Results
2. Beyond contamination: Enhancing plant tolerance to arsenic through phytobial remediation
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Rahman, Saeed ur, Liu, Xinxin, Khalid, Muhammad, Rehman, Asad, Cao, Junfeng, Kayani, Sadaf-Ilyas, Naeem, Muhammad, Ahmad, Naveed, Khan, Abid Ali, Manzoor, Muhammad Aamir, Zhao, Chang, Tan, Haoxin, Li, Xiaoxiao, Bian, Yucheng, Xu, Jingyao, and Hui, Nan
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- 2024
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3. Piriformospora indica alter root-associated microbiome structure to enhance Artemisia annua L. tolerance to arsenic
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Rahman, Saeed ur, Khalid, Muhammad, Hui, Nan, Rehman, Asad, Kayani, Sadaf-Ilyas, Fu, Xueqing, Zheng, Han, Shao, Jin, Khan, Abid Ali, Ali, Mehran, Taheri, Ayat, Liu, Hang, Yan, Xin, Hu, Xinyi, Qin, Wei, Peng, Bowen, Li, Meng, Xinghao, Yao, Zhang, Yaojie, and Tang, Kexuan
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- 2023
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4. Enhancing biomass productivity towards carbohydrates and fatty acids biosynthesis under the effects of magneto-electric composite fields on filamentous algae
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Kayani, Sadaf-Ilyas, Jin, Nana, Cui, Yi, Zan, Xinyi, Hu, Xinjuan, Xu, Xiangru, Zhu, Feifei, Zhang, Cunsheng, and Huo, Shuhao
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- 2023
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5. Mathematical study of Algae as a bio-fertilizer using fractal–fractional dynamic model
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Mahmood, Tariq, ur Rahman, Mati, Arfan, Muhammad, Kayani, Sadaf-Ilyas, and Sun, Mei
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- 2023
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6. Ensemble Usage for Classification of EEG Signals A Review with Comparison.
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Zaib Unnisa, Sultan Zia, Umair Muneer Butt, Sukumar Letchmunan, and Sadaf Ilyas
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- 2020
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7. A high-efficiency Agrobacterium-mediated transient expression system in the leaves of Artemisia annua L.
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Yongpeng Li, Tiantian Chen, Wei Wang, Hang Liu, Xin Yan, Kuanyu Wu-Zhang, Wei Qin, Lihui Xie, Yaojie Zhang, Bowen Peng, Xinghao Yao, Chen Wang, Sadaf-Ilyas Kayani, Xueqing Fu, Ling Li, and Kexuan Tang
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Artemisia annua ,Transient transformation ,Transcription factor ,Promoter activity ,Transcription activation ,Plant culture ,SB1-1110 ,Biology (General) ,QH301-705.5 - Abstract
Abstract Background The Agrobacterium-mediated transient transformation, which proved effective in diverse plant species, has been widely applied for high-throughput gene function studies due to its simplicity, rapidity, and high efficiency. Despite the efforts have made on Artemisia annua transient expression, achieving high-throughput gene functional characterization basing on a fast and easy-manipulated transient transformation system in A. annua remains challenging. Results The first pair of true leaves of A. annua is an ideal candidate for Agrobacterium injection. EHA105 was the optimal strain that can be used for the development of the transient expression system. The supplementation of Triton X-100 at a concentration of 0.005% greatly improved the transient expression frequency. According to the histochemical β-Glucuronidase (GUS) staining assay, high transient expression level of the reporter gene (GUS) maintained at least a week. Dual-luciferase (Dual-LUC) transient assays showed that the activity of cauliflower mosaic virus 35S (CaMV35S) promoter and its derivates varied between A. annua and tobacco. In A. annua, the CaMV35S promoter had comparable activity with double CaMV35S promoter, while in tobacco, CaMV35S exhibited approximately 50% activity of double CaMV35S promoter. Otherwise, despite the CaMV35S promoter and double CaMV35S promoter from GoldenBraid Kit 2.0 displayed high activity strength in tobacco, they demonstrated a very low activity in transiently expressed A. annua. The activity of UBQ10 promoter and endogenous UBQb promoter was investigated as well. Additionally, using our transient expression system, the transactivation of AaGSW1 and AaORA on AaCYP71AV1 promoter was confirmed. Dual-LUC assays demonstrated that AaHD8 activated the expression of two glandular secreting trichomes-specific lipid transfer protein genes AaLTP1 and AaLTP2, indicating that AaLTP1 and AaLTP2 might serve as downstream components of AaHD8-involved glandular trichome initiation and cuticle formation, as well as artemisinin secretion in A. annua. Conclusions A simple, rapid, good-reproducibility, high-efficiency and low-cost transient transformation system in A. annua was developed. Our method offered a new way for gene functional characterization studies such as gene subcellular localization, promoter activity and transcription activation assays in A. annua, avoiding the aberrant phenotypes resulting from gene expression in a heterologous system.
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- 2021
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8. Basic Helix-Loop-Helix Transcription Factors AabHLH2 and AabHLH3 Function Antagonistically With AaMYC2 and Are Negative Regulators in Artemisinin Biosynthesis
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Qian Shen, Huayi Huang, Lihui Xie, Xiaolong Hao, Sadaf-Ilyas Kayani, Hang Liu, Wei Qin, Tiantian Chen, Qifang Pan, Pin Liu, and Kexuan Tang
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bHLH ,MYC2 ,transcription regulation ,Artemisia annua ,artemisinin ,Plant culture ,SB1-1110 - Abstract
Plants have evolved sophisticated systems for regulating the biosynthesis of specialized phytochemicals. Artemisinin, which is a sesquiterpene lactone widely used in anti-malaria treatment, is produced by the Artemisia annua L. plant. However, the artemisinin content in A. annua is low and difficult to meet market demands. Studies have shown that artemisinin biosynthesis in A. annua has complex temporal and spatial specificity and is under tightly transcriptional regulation. However, the mechanism of transcriptional regulation of artemisinin biosynthesis remains unclear. In this study, we identified two MYC-type bHLH transcription factors (AabHLH2 and AabHLH3) as novel regulators of artemisinin biosynthesis. These bHLH TFs act as transcription repressors and function redundantly to negatively regulate artemisinin biosynthesis. Furthermore, AabHLH2 and AabHLH3 are nuclear proteins that bind to DNA elements with similar specificity to that of AaMYC2, but lack the conserved activation domain, suggesting that repression is achieved by competition for the same cis-regulatory elements. Together, our findings reveal a novel artemisinin biosynthesis regulatory network, provide new insight into how specialized metabolites are modulated in plants, and propose a model in which different bHLH TFs coordinated in regulating artemisinin production in the plant. Finally, this study provides some useful target genes for metabolic engineering of artemisinin production via CRISPR/Cas9 gene editing.
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- 2022
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9. Molecular approaches to enhance astaxanthin biosynthesis; future outlook: engineering of transcription factors in Haematococcus pluvialis.
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Kayani, Sadaf-Ilyas, -Rahman, Saeed-ur, Shen, Qian, Cui, Yi, Liu, Wei, Hu, Xinjuan, Zhu, Feifei, and Huo, Shuhao
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ASTAXANTHIN , *TRANSCRIPTION factors , *BINDING sites , *GENETIC transformation , *EVIDENCE gaps , *CHEMICAL synthesis , *KNOWLEDGE gap theory - Abstract
Microalgae are the preferred species for producing astaxanthin because they pose a low toxicity risk than chemical synthesis. Astaxanthin has multiple health benefits and is being used in: medicines, nutraceuticals, cosmetics, and functional foods. Haematococcus pluvialis is a model microalga for astaxanthin biosynthesis; however, its natural astaxanthin content is low. Therefore, it is necessary to develop methods to improve the biosynthesis of astaxanthin to meet industrial demands, making its commercialization cost-effective. Several strategies related to cultivation conditions are employed to enhance the biosynthesis of astaxanthin in H. pluvialis. However, the mechanism of its regulation by transcription factors is unknown. For the first time, this study critically reviewed the studies on identifying transcription factors, progress in H. pluvialis genetic transformation, and use of phytohormones that increase the gene expression related to astaxanthin biosynthesis. In addition, we propose future approaches, including (i) Cloning and characterization of transcription factors, (ii) Transcriptional engineering through overexpression of positive regulators or downregulation/silencing of negative regulators, (iii) Gene editing for enrichment or deletion of transcription factors binding sites, (iv) Hormonal modulation of transcription factors. This review provides considerable knowledge about the molecular regulation of astaxanthin biosynthesis and the existing research gap. Besides, it provides the basis for transcription factors mediated metabolic engineering of astaxanthin biosynthesis in H. pluvialis. [ABSTRACT FROM AUTHOR]
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- 2024
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10. A high-efficiency Agrobacterium-mediated transient expression system in the leaves of Artemisia annua L.
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Li, Yongpeng, Chen, Tiantian, Wang, Wei, Liu, Hang, Yan, Xin, Wu-Zhang, Kuanyu, Qin, Wei, Xie, Lihui, Zhang, Yaojie, Peng, Bowen, Yao, Xinghao, Wang, Chen, Kayani, Sadaf-Ilyas, Fu, Xueqing, Li, Ling, and Tang, Kexuan
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- 2021
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11. Transcriptional regulation of flavonoid biosynthesis in Artemisia annua by AaYABBY5
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Kayani, Sadaf-Ilyas, Shen, Qian, Rahman, Saeed-ur, Fu, Xueqing, Li, Yongpeng, Wang, Chen, Hassani, Danial, and Tang, Kexuan
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- 2021
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12. Biological Activities of Artemisinins Beyond Anti-Malarial: a Review
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Saeed-ur-Rahman, Khalid, Muhammad, Kayani, Sadaf-Ilyas, Jan, Farooq, Ullah, Ayaz, and Tang, Kexuan
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- 2019
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13. Formulation and in vitro evaluation of carbopol 934-based modified clotrimazole gel for topical application
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MUHAMMAD UBAID, SADAF ILYAS, SADULLAH MIR, ABIDA K. KHAN, REHANA RASHID, MUHAMMAD Z.U. KHAN, ZAINAB G. KANWAL, AHMAD NAWAZ, AMNA SHAH, and GHULAM MURTAZA
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Central composite design ,clotrimazole ,permeability enhancer ,topical gel ,Science - Abstract
ABSTRACT The aim of present study was to enhance topical permeation of clotrimazole gel preparation by using various permeability enhancers such as coconut oil, pistachio oil and sodium lauryl sulphate (SLS). Clotrimazole gel preparations were prepared and optimized by using three factor, five level central composite design. A second-order polynomial equation was generated in order to estimate the effect of independent variables i.e. coconut oil (X1), pistachio oil (X2) and sodium lauryl sulphate (X3) at various dependent variables i.e. flux (Y1), lag time (Y2), diffusion coefficient (Y3), permeability coefficient (Y4), and input rate (Y5) of clotrimazole gel formulations. Ex vivo skin permeation study was performed through rat skin by using modified Franz diffusion cell system. Optimized formulation F8 exhibited highest flux 2.17 µg/cm2/min, permeability coefficient 0.0019 cm/min and input rate 1.543 µg/cm2/min, along with moderate lag time 77.27 min and diffusion coefficient 0.063 cm2/min, which is further supported by anti-fungal activity that exhibited more prominent zone of inhibition against Candida albicans, Aspergillus niger and Mucor. Thus, it can be concluded that permeation of clotrimazole gel was enhanced by various combination of coconut oil, pistachio oil and sodium lauryl sulphate but optimized formulation F8 containing 0.4 ml pistachio oil, 0.8 ml coconut oil and 0.04 g of SLS exhibited more pronounced and promising effect through rat skin.
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14. Plasmodiophora brassicae–The causal agent of clubroot and its biological control/suppression with fungi–A review
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Muhammad Khalid, Saeed-ur- Rahman, Sadaf-Ilyas Kayani, Abid Ali Khan, Hammed Gul, and Nan Hui
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Plant Science - Published
- 2022
15. JA-regulated AaGSW1-AaYABBY5/AaWRKY9 complex regulates artemisinin biosynthesis in Artemisia annua
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Kayani, Sadaf-Ilyas, primary, Ma, Yanan, additional, Fu, Xueqing, additional, Qian, Shen, additional, Li, Yongpeng, additional, Rahman, Saeed-ur, additional, Peng, Bowen, additional, Liu, Hang, additional, and Tang, Kexuan, additional
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- 2023
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16. JA-Regulated AaGSW1–AaYABBY5/AaWRKY9 Complex Regulates Artemisinin Biosynthesis in Artemisia annua
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Sadaf-Ilyas Kayani, Ma Yanan, Xueqing Fu, Qian Shen, Yongpeng Li, Saeed-ur Rahman, Bowen Peng, Liu Huang, and Kexuan Tang
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Physiology ,Cell Biology ,Plant Science ,General Medicine - Abstract
Artemisinin, a sesquiterpene lactone obtained from Artemisia annua, is an essential therapeutic against malaria. YABBY family transcription factor AaYABBY5 is an activator of AaCYP71AV1 (cytochrome P450–dependent hydroxylase) and AaDBR2 (double-bond reductase 2); however, the protein–protein interactions of AaYABBY5, as well as the mechanism of its regulation, have not yet been elucidated. AaWRKY9 protein is a positive regulator of artemisinin biosynthesis that activates AaGSW1 (glandular trichome–specific WRKY1) and AaDBR2 (double-bond reductase 2). In this study, YABBY–WRKY interactions are revealed to indirectly regulate artemisinin production. AaYABBY5 significantly increased the activity of the luciferase (LUC) gene fused to the promoter of AaGSW1. Toward the molecular basis of this regulation, AaYABBY5 interaction with AaWRKY9 protein was found. The combined effectors AaYABBY5 + AaWRKY9 showed synergistic effects toward the activities of AaGSW1 and AaDBR2 promoters, respectively. In AaYABBY5 overexpression plants, the expression of GSW1 was found to be significantly increased when compared to that of AaYABBY5 antisense or control plants. In addition, AaGSW1 was identified as an upstream activator of AaYABBY5. Further, it was found that AaJAZ8, a transcriptional repressor of jasmonate signaling, interacted with AaYABBY5 and attenuated its activity. Co-expression of AaYABBY5 and anti-AaJAZ8 in A. annua increased the activity of AaYABBY5 toward artemisinin biosynthesis. This current study provides the first indication of the molecular basis of regulation of artemisinin biosynthesis through YABBY–WRKY interactions, which are regulated through AaJAZ8. This knowledge presents AaYABBY5 overexpression plants as a powerful genetic resource for artemisinin biosynthesis.
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- 2023
17. Optimization of cell suspension culture of transformed and untransformed lettuce for the enhanced production of secondary metabolites and their pharmaceutical evaluation
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Ismail, Hammad, Kayani, Sania Sabahat, Kayani, Sadaf Ilyas, Mirza, Bushra, and Waheed, Mohammad Tahir
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- 2019
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18. Role of Hepatic and Renal Profile in the Development of Gestational Diabetes Mellitus
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Yasmin Ashraf, Sadaf Ilyas, Samina Ashraf, Nabila Roohi, and Sobia Alyas
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endocrine system diseases ,nutritional and metabolic diseases - Abstract
Disturbances in hepatic and renal profile are well documented in diabetic patients. Antenatal pregnant women (n=300) selected for blood sampling during the early 2ndtrimester (14–18 weeks of gestation) including 176 pregnant women with positive family history of GDM and 124 women without any history of GDM. All the subjects were followed up to the early 3rd trimester (24-28 weeks of gestation) or until the onset of GDM for second sampling. Mean values of ALP, AST and GGT were significantly higher (p
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- 2021
19. Enhancing biomass productivity towards carbohydrates and fatty acids biosynthesis under the effects of magneto-electric composite fields on filamentous algae
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Sadaf-Ilyas Kayani, Nana Jin, Yi Cui, Xinyi Zan, Xinjuan Hu, Xiangru Xu, Feifei Zhu, Cunsheng Zhang, and Shuhao Huo
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Renewable Energy, Sustainability and the Environment ,Forestry ,Waste Management and Disposal ,Agronomy and Crop Science - Published
- 2023
20. Transcriptomic analysis reveals the parallel transcriptional regulation of UV-B-induced artemisinin and flavonoid accumulation in Artemisia annua L
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Xiaofen Sun, Kexuan Tang, Yongpeng Li, Danial Hassani, Wei Qin, Hang Liu, Ling Li, Lihui Xie, Sadaf-Ilyas Kayani, Bowen Peng, Chen Tiantian, Xueqing Fu, Kuanyu Wu-Zhang, Yaojie Zhang, Xin Yan, and Chen Wang
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0106 biological sciences ,0301 basic medicine ,Ultraviolet Rays ,Physiology ,Flavonoid ,Artemisia annua ,Plant Science ,Biology ,01 natural sciences ,Transcriptome ,03 medical and health sciences ,chemistry.chemical_compound ,Biosynthesis ,Gene Expression Regulation, Plant ,parasitic diseases ,Genetics ,Transcriptional regulation ,medicine ,heterocyclic compounds ,MYB ,Artemisinin ,Flavonoids ,chemistry.chemical_classification ,fungi ,food and beverages ,biology.organism_classification ,Artemisinins ,030104 developmental biology ,Flavonoid biosynthesis ,chemistry ,Biochemistry ,010606 plant biology & botany ,medicine.drug - Abstract
UV-B radiation is a pivotal photomorphogenic signal and positively regulates plant growth and metabolite biosynthesis. In order to elucidate the transcriptional regulation mechanism underlying UV-B-induced artemisinin and flavonoid biosynthesis in Artemisia annua, the transcriptional responses of A. annua L. leaves to UV-B radiation were analyzed using the Illumina transcriptome sequencing. A total of 10705 differentially expressed genes (DEGs) including 533 transcription factors (TFs), were identified. Based on the expression trends of the differentially expressed TFs as well as artemisinin and flavonoid biosynthesis genes, we speculated that TFs belonging to 6 clusters were most likely to be involved in the regulation of artemisinin and/or flavonoid biosynthesis. The regulatory relationship between TFs and artemisinin/flavonoid biosynthetic genes was further studied. Dual-LUC assays results showed that AaMYB6 is a positive regulator of AaLDOX which belongs to flavonoid biosynthesis pathway. In addition, we identified an R2R3 MYB TF, AaMYB4 which potentially mediated both artemisinin and flavonoid biosynthesis pathways by activating the expression of AaADS and AaDBR2 in artemisinin biosynthesis pathway and AaUFGT in flavonoid biosynthesis pathway. Overall, our findings would provide an insight into the elucidation of the parallel transcriptional regulation of artemisinin and flavonoid biosynthesis in A. annua L. under UV-B radiation.
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- 2021
21. Plasmodiophora brassicae–The causal agent of clubroot and its biological control/suppression with fungi–A review
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Khalid, Muhammad, primary, Rahman, Saeed-ur-, additional, Kayani, Sadaf-Ilyas, additional, Khan, Abid Ali, additional, Gul, Hammed, additional, and Hui, Nan, additional
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- 2022
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22. Basic Helix-Loop-Helix Transcription Factors AabHLH2 and AabHLH3 Function Antagonistically With AaMYC2 and Are Negative Regulators in Artemisinin Biosynthesis
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Shen, Qian, primary, Huang, Huayi, additional, Xie, Lihui, additional, Hao, Xiaolong, additional, Kayani, Sadaf-Ilyas, additional, Liu, Hang, additional, Qin, Wei, additional, Chen, Tiantian, additional, Pan, Qifang, additional, Liu, Pin, additional, and Tang, Kexuan, additional
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- 2022
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23. Piriformospora indica alter root-associated microbiome structure to enhance Artemisia annua L. tolerance to arsenic
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Saeed ur Rahman, Muhammad Khalid, Nan Hui, Asad Rehman, Sadaf-Ilyas Kayani, Xueqing Fu, Han Zheng, Jin Shao, Abid Ali Khan, Mehran Ali, Ayat Taheri, Hang Liu, Xin Yan, Xinyi Hu, Wei Qin, Bowen Peng, Meng Li, Yao Xinghao, Yaojie Zhang, and Kexuan Tang
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Environmental Engineering ,Health, Toxicology and Mutagenesis ,Environmental Chemistry ,Pollution ,Waste Management and Disposal - Published
- 2023
24. Jasmonate‐ and abscisic acid‐activated AaGSW1‐AaTCP15/AaORA transcriptional cascade promotes artemisinin biosynthesis in Artemisia annua
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Xiaolong Hao, Zhang-Kuanyu Wu, Yanan Ma, Qian Shen, Ling Li, Pin Liu, Lihui Xie, Kexuan Tang, Xiaofen Sun, Xueqing Fu, Xin Yan, Qifang Pan, Hang Liu, Xu Dongbei, Zongyou Lv, Danial Hassani, and Sadaf Ilyas Kayani
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artemisinin biosynthesis ,0106 biological sciences ,0301 basic medicine ,Artemisia annua ,Cyclopentanes ,Plant Science ,Sesquiterpene lactone ,01 natural sciences ,abscisic acid ,03 medical and health sciences ,Transactivation ,chemistry.chemical_compound ,Gene Expression Regulation, Plant ,parasitic diseases ,Transcriptional regulation ,medicine ,Oxylipins ,Jasmonate ,Artemisinin ,AaORA transcriptional cascade ,Transcription factor ,Abscisic acid ,Research Articles ,Plant Proteins ,chemistry.chemical_classification ,biology ,fungi ,food and beverages ,biology.organism_classification ,jasmonate ,AaGSW1‐AaTCP15 ,Artemisinins ,Cell biology ,030104 developmental biology ,chemistry ,Agronomy and Crop Science ,Research Article ,010606 plant biology & botany ,Biotechnology ,medicine.drug - Abstract
Summary Artemisinin, a sesquiterpene lactone widely used in malaria treatment, was discovered in the medicinal plant Artemisia annua. The biosynthesis of artemisinin is efficiently regulated by jasmonate (JA) and abscisic acid (ABA) via regulatory factors. However, the mechanisms linking JA and ABA signalling with artemisinin biosynthesis through an associated regulatory network of downstream transcription factors (TFs) remain enigmatic. Here we report AaTCP15, a JA and ABA dual‐responsive teosinte branched1/cycloidea/proliferating (TCP) TF, which is essential for JA and ABA‐induced artemisinin biosynthesis by directly binding to and activating the promoters of DBR2 and ALDH1, two genes encoding enzymes for artemisinin biosynthesis. Furthermore, AaORA, another positive regulator of artemisinin biosynthesis responds to JA and ABA, interacts with and enhances the transactivation activity of AaTCP15 and simultaneously activates AaTCP15 transcripts. Hence, they form an AaORA‐AaTCP15 module to synergistically activate DBR2, a crucial gene for artemisinin biosynthesis. More importantly, AaTCP15 expression is activated by the multiple reported JA and ABA‐responsive TFs that promote artemisinin biosynthesis. Among them, AaGSW1 acts at the nexus of JA and ABA signalling to activate the artemisinin biosynthetic pathway and directly binds to and activates the AaTCP15 promoter apart from the AaORA promoter, which further facilitates formation of the AaGSW1‐AaTCP15/AaORA regulatory module to integrate JA and ABA‐mediated artemisinin biosynthesis. Our results establish a multilayer regulatory network of the AaGSW1‐AaTCP15/AaORA module to regulate artemisinin biosynthesis through JA and ABA signalling, and provide an interesting avenue for future research exploring the special transcriptional regulation module of TCP genes associated with specialized metabolites in plants.
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- 2021
25. Diversity and versatile functions of metallothioneins produced by plants: A review
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Kexuan Tang, Muhammad Khalid, Nan Hui, Sadaf-Ilyas Kayani, and Saeed-ur-Rahman
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chemistry.chemical_classification ,Reactive oxygen species ,Cadmium ,Soil Science ,chemistry.chemical_element ,04 agricultural and veterinary sciences ,Oxidative phosphorylation ,010501 environmental sciences ,01 natural sciences ,chemistry.chemical_compound ,Biosynthesis ,chemistry ,Biochemistry ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,Phytochelatin ,Intracellular ,Heavy metal detoxification ,0105 earth and related environmental sciences ,Cysteine - Abstract
Metal ions are essential for plant growth and development, but in excess, these compounds can become highly toxic. Plants have adopted numerous ways to maintain metal homeostasis while mitigating adverse effects of excess metal ions, including phytochelatin and the metal-chelating proteins metallothioneins (MTs). A family of cysteine (Cys)-rich, intracellular, and low-molecular-weight (4–8 kDa) MTs are proteins found in nearly all phyla including plants, animals, and fungi, and they have the potential to scavenge reactive oxygen species and detoxify toxic metals including copper, cadmium, and zinc. Based on their Cys numbers and residues, MTs have been categorized into three major classes. Class I MTs, which have highly conserved Cys residues, are found in animals, while class II MTs, with less conserved Cys residues, are present in plants and are classified further into four groups. Class III MTs include phytochelatins, a group of enzymatically synthesized Cys-rich proteins. The MTs have been an area of interest for five decades with extensive studies, which have been facilitated by advancements in instrumental techniques, protein science, and molecular biology tools. Here, we reviewed current advances in our understanding of the regulation of MT biosynthesis, their expression, and their potential roles in the alleviation of abiotic stresses (i.e., drought, salinity, and oxidative stresses) and heavy metal detoxification and homeostasis.
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- 2020
26. Enhancing Biomass Productivity Towards Carbohydrates and Fatty Acids Biosynthesis Under the Effects of Magneto-Electric Compositefields on Filamentous Algae
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Sadaf Ilyas Kayani, Nana Jin, Yi Cui, Xinyi Zan, Xinjuan Hu, Xiangru Xu, Feifei Zhu, Cunsheng Zhang, and Shuhao Huo
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History ,Polymers and Plastics ,Business and International Management ,Industrial and Manufacturing Engineering - Published
- 2022
27. Transcriptional regulation of flavonoid biosynthesis in Artemisia annua by AaYABBY5
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Danial Hassani, Yongpeng Li, Chen Wang, Xueqing Fu, Saeed-ur Rahman, Qian Shen, Kexuan Tang, and Sadaf-Ilyas Kayani
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Chalcone synthase ,chemistry.chemical_classification ,Chalcone isomerase ,Plant molecular biology ,biology ,fungi ,Flavonoid ,Artemisia annua ,food and beverages ,Plant Science ,Phenylalanine ammonia-lyase ,Horticulture ,biology.organism_classification ,Biochemistry ,Article ,Flavonoid biosynthesis ,chemistry ,Genetics ,biology.protein ,Flavonol synthase ,Secondary metabolism ,Metabolic engineering ,Biotechnology ,Nicotiana - Abstract
Artemisia annua is a medicinal plant rich in terpenes and flavonoids with useful biological activities such as antioxidant, anticancer, and antimalarial activities. The transcriptional regulation of flavonoid biosynthesis in A. annua has not been well-studied. In this study, we identified a YABBY family transcription factor, AaYABBY5, as a positive regulator of anthocyanin and total flavonoid contents in A. annua. AaYABBY5 was selected based on its similar expression pattern to the phenylalanine ammonia lyase (PAL), chalcone synthase (CHS), chalcone isomerase (CHI), and flavonol synthase (FLS) genes. A transient dual-luciferase assay in Nicotiana bethamiana with the AaYABBY5 effector showed a significant increase in the activity of the downstream LUC gene, with reporters AaPAL, AaCHS, AaCHI, and AaUFGT. The yeast one-hybrid system further confirmed the direct activation of these promoters by AaYABBY5. Gene expression analysis of stably transformed AaYABBY5 overexpression, AaYABBY5 antisense, and control plants revealed a significant increase in the expression of AaPAL, AaCHS, AaCHI, AaFLS, AaFSII, AaLDOX, and AaUFGT in AaYABBY5 overexpression plants. Moreover, their total flavonoid content and anthocyanin content were also found to increase. AaYABBY5 antisense plants showed a significant decrease in the expression of flavonoid biosynthetic genes, as well as a decrease in anthocyanin and total flavonoid contents. In addition, phenotypic analysis revealed deep purple-pigmented stems, an increase in the leaf lamina size, and higher trichome densities in AaYABBY5 overexpression plants. Together, these data proved that AaYABBY5 is a positive regulator of flavonoid biosynthesis in A. annua. Our study provides candidate transcription factors for the improvement of flavonoid concentrations in A. annua and can be further extended to elucidate its mechanism of regulating trichome development.
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- 2021
28. Enhancing Biomass Productivity Towards Carbohydrates and Fatty Acids Biosynthesis Under the Effects of Magneto-Electric Compositefields on Filamentous Algae
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Kayani, Sadaf Ilyas, primary, Jin, Nana, additional, Cui, Yi, additional, Zan, Xinyi, additional, Hu, Xinjuan, additional, Xu, Xiangru, additional, Zhu, Feifei, additional, Zhang, Cunsheng, additional, and Huo, Shuhao, additional
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- 2022
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29. A high-efficiency Agrobacterium-mediated transient expression system in the leaves of Artemisia annua L
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Kexuan Tang, Kuanyu Wu-Zhang, Lihui Xie, Xueqing Fu, Sadaf-Ilyas Kayani, Hang Liu, Yaojie Zhang, Wei Wang, Chen Wang, Wei Qin, Xinghao Yao, Yongpeng Li, Ling Li, Bowen Peng, Xin Yan, and Chen Tiantian
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Reporter gene ,biology ,QH301-705.5 ,Chemistry ,Agrobacterium ,Transient transformation ,Methodology ,Artemisia annua ,Plant culture ,Plant Science ,biology.organism_classification ,Molecular biology ,SB1-1110 ,Transactivation ,Transformation (genetics) ,Promoter activity ,Gene expression ,Genetics ,Transcription activation ,Cauliflower mosaic virus ,Transcription factor ,Biology (General) ,Gene ,Biotechnology - Abstract
Background The Agrobacterium-mediated transient transformation, which proved effective in diverse plant species, has been widely applied for high-throughput gene function studies due to its simplicity, rapidity, and high efficiency. Despite the efforts have made on Artemisia annua transient expression, achieving high-throughput gene functional characterization basing on a fast and easy-manipulated transient transformation system in A. annua remains challenging. Results The first pair of true leaves of A. annua is an ideal candidate for Agrobacterium injection. EHA105 was the optimal strain that can be used for the development of the transient expression system. The supplementation of Triton X-100 at a concentration of 0.005% greatly improved the transient expression frequency. According to the histochemical β-Glucuronidase (GUS) staining assay, high transient expression level of the reporter gene (GUS) maintained at least a week. Dual-luciferase (Dual-LUC) transient assays showed that the activity of cauliflower mosaic virus 35S (CaMV35S) promoter and its derivates varied between A. annua and tobacco. In A. annua, the CaMV35S promoter had comparable activity with double CaMV35S promoter, while in tobacco, CaMV35S exhibited approximately 50% activity of double CaMV35S promoter. Otherwise, despite the CaMV35S promoter and double CaMV35S promoter from GoldenBraid Kit 2.0 displayed high activity strength in tobacco, they demonstrated a very low activity in transiently expressed A. annua. The activity of UBQ10 promoter and endogenous UBQb promoter was investigated as well. Additionally, using our transient expression system, the transactivation of AaGSW1 and AaORA on AaCYP71AV1 promoter was confirmed. Dual-LUC assays demonstrated that AaHD8 activated the expression of two glandular secreting trichomes-specific lipid transfer protein genes AaLTP1 and AaLTP2, indicating that AaLTP1 and AaLTP2 might serve as downstream components of AaHD8-involved glandular trichome initiation and cuticle formation, as well as artemisinin secretion in A. annua. Conclusions A simple, rapid, good-reproducibility, high-efficiency and low-cost transient transformation system in A. annua was developed. Our method offered a new way for gene functional characterization studies such as gene subcellular localization, promoter activity and transcription activation assays in A. annua, avoiding the aberrant phenotypes resulting from gene expression in a heterologous system.
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- 2021
30. Pollen morphological variation of Berberis L. from Pakistan and its systematic importance
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Shujaul Mulk Khan, Muhammad Zafar, Raees Khan, Mushtaq Ahmad, Sajad Hussain, Saeed ur rahman, Sadaf-Ilyas Kayani, and Muhammad Khalid
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Berberis ,Biometry ,Histology ,Morphological variation ,02 engineering and technology ,medicine.disease_cause ,03 medical and health sciences ,0302 clinical medicine ,Species level ,Genus ,Pollen ,Botany ,medicine ,Pakistan ,Instrumentation ,Aperture (botany) ,Palynology ,Microscopy ,biology ,030206 dentistry ,021001 nanoscience & nanotechnology ,biology.organism_classification ,Medical Laboratory Technology ,Biological Variation, Population ,Microscopy, Electron, Scanning ,Lycium ,Anatomy ,0210 nano-technology - Abstract
Due to overlapping and diverse morphological characters, Berberis is among the most taxonomically complex genera. Palynology is one of the taxonomic tools for delimitation and identification of complex species. In this study, pollens of 10 Berberis species were analyzed through light and scanning electron microscopy. Qualitative as well as quantitative features (pollen shape, size, presence or absence of colpi, colpi length and width, exine thickness, ornamentation, pollen class, aperture, and polar-equatorial ratio) were measured. Five species were observed to have colpate (pantocolpate) with elongated ends, radially symmetrical, isopolar, monads, and psilate-regulate pollens. In polar view, six pollen were spheroidal, two were ovoid, one spherical, and one oblate. Similarly, variation in pollen length was prominent and the largest pollen on polar view was recorded for B. psodoumbellata 60-65 μm (62.4 ± 0.9), while the smallest one was observed for B. lycium 29-35 μm (32.2 ± 1). The observed variation in both quantitative and qualitative features were important in taxonomic identification. This shows that palynological characters are helpful in identification of Berberis genus at the species level.
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- 2019
31. Awareness and Attitudes of Research Students Toward Dual-use Research of Concern in Pakistan: A Cross-sectional Questionnaire
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Sadaf Ilyas, Faizan Rashid, Samreen Sarwar, Bilal Ahmed Khan, Aurora O. Amoah, Danielle C. Lohman, Saleha Haffez, Saeed Akhtar Khan, Madiha Rafique, and Junaid Akhtar
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Sociology of scientific knowledge ,Biomedical Research ,Health (social science) ,Health, Toxicology and Mutagenesis ,030231 tropical medicine ,Management, Monitoring, Policy and Law ,Security Measures ,03 medical and health sciences ,0302 clinical medicine ,Surveys and Questionnaires ,Global health ,Humans ,Pakistan ,030212 general & internal medicine ,Students ,Medical education ,Information Dissemination ,Field (Bourdieu) ,Public Health, Environmental and Occupational Health ,Containment of Biohazards ,Bioterrorism ,Dual (category theory) ,Cross-Sectional Studies ,Emergency Medicine ,Psychology ,Safety Research - Abstract
Dual-use research poses a significant challenge for scientists in the biomedical field and for global health security in general. As the scientific knowledge and materials required for the development of biological agents become progressively more accessible and inexpensive, there is an increased need to understand and improve the governance of scientific research. Prevention of the misuse of facilities, equipment, agents, and scientific knowledge requires high levels of awareness of the concept of dual-use research, starting with early-career scientists and graduate students. In this study, the attitudes and level of awareness of postgraduate students in Pakistan toward the issues surrounding dual-use research were assessed through a survey containing both quantitative and qualitative questions in 32 universities in 4 provinces, federal area, and Azad Jammu and Kashmir regions of Pakistan; 933 students responded. Most (58.2%) had never heard of dual-use research of concern (DURC), while 18.5% had heard the term but were unsure of its meaning. Irrespective of prior knowledge, a higher percentage of students (68.6%) felt an obligation to report research misuse. Considering the need for DURC training, 94.1% of the respondents agreed that the principal investigator should take the responsibility to train students on DURC at the start of a research project. When experimental results having dual-use potential, 69.1% indicated they would publish with limited protocol, with 43.5% indicating they would publish the limited protocol only if there was a way for scientists to access their data. The survey results revealed limited DURC awareness among researchers across Pakistan. However, the respondents, although not formally educated about DURC, were quite aware of its impact. The information gained in this survey will be valuable in addressing country-specific awareness and training needs.
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- 2019
32. Biological Activities of Artemisinins Beyond Anti-Malarial: a Review
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Farooq Jan, Muhammad Khalid, Kexuan Tang, Sadaf-Ilyas Kayani, Saeed-ur-Rahman, and Ayaz Ullah
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0106 biological sciences ,0301 basic medicine ,Artemisinins ,Plant Science ,Pharmacology ,Biology ,01 natural sciences ,law.invention ,03 medical and health sciences ,chemistry.chemical_compound ,law ,parasitic diseases ,Genetics ,medicine ,Artemether ,Artemisinin ,Clinical pharmacology ,medicine.disease ,030104 developmental biology ,Drug class ,Drug development ,chemistry ,Artesunate ,Malaria ,010606 plant biology & botany ,medicine.drug - Abstract
Artemisinins, as a class of bioactive molecules, are mainly derived from the extracts of Artemisia annua L. and are the mainstay for malaria treatment, including severe malaria, uncomplicated malaria and multi-drug resistant malaria. They are well-known for their good tolerability, safety and rapid onset of action. Their efficacy is not only limited to malaria but also extends to a variety of human diseases such as cancer, tuberculosis, viral diseases (e.g. Human cytomegalovirus), immune diseases and parasitic infections like schistosomiasis. Being a cheap and safe drug class, which saves millions of lives at risk from malaria around the globe, can also have significant potential in oncology as they have shown anti-cancer properties in both cell lines and animal models. Active derivatives (e.g. artesunate, artemether and arteether etc.) have also been synthesized which can be used for oral, rectal, intramuscular and intravenous administration. A comprehensive update on the non-malarial use of artemisinins and/or their derivatives and artemisinin-based drug development beyond anti-malarial is discussed in this review. With the collaborative efforts in the clinical pharmacology of artemisinins and novel synthesis of artemisinin analogues, it is likely that artemisinin-based drugs will become an important armamentarium impeding a number of diseases beyond malaria.
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- 2019
33. Transcriptomic analysis reveals the parallel transcriptional regulation of UV-B-induced artemisinin and flavonoid accumulation in Artemisia annua L.
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Li, Yongpeng, primary, Qin, Wei, additional, Fu, Xueqing, additional, Zhang, Yaojie, additional, Hassani, Danial, additional, Kayani, Sadaf-Ilyas, additional, Xie, Lihui, additional, Liu, Hang, additional, Chen, Tiantian, additional, Yan, Xin, additional, Peng, Bowen, additional, Wu-Zhang, Kuanyu, additional, Wang, Chen, additional, Sun, Xiaofen, additional, Li, Ling, additional, and Tang, Kexuan, additional
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- 2021
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34. Additional file 1 of A high-efficiency Agrobacterium-mediated transient expression system in the leaves of Artemisia annua L
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Li, Yongpeng, Chen, Tiantian, Wang, Wei, Liu, Hang, Yan, Xin, Wu-Zhang, Kuanyu, Qin, Wei, Xie, Lihui, Zhang, Yaojie, Peng, Bowen, Yao, Xinghao, Wang, Chen, Kayani, Sadaf-Ilyas, Fu, Xueqing, Li, Ling, and Tang, Kexuan
- Abstract
Additional file 1: Figure S1 Necrosis was observed in leaves infiltrated with Agrobacterium cells harboring pEAQ-HT-DEST1-eGFP construct at 24 hours post injection. Figure S2 Heatmap of the expression levels of A. annua polyubiquitin genes in different organs/tissues. Figure S3 Heatmap of the expression levels of A. annua LTP2, LTP1 and HD8, as well as four structural artemisinin biosynthesis genes in different organs/tissues. Table S1 Primers used in this article.
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- 2021
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35. The ameliorative effects of exogenous inoculation of Piriformospora indica on molecular, biochemical and physiological parameters of Artemisia annua L. under arsenic stress condition
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Muhammad Khalid, Saeed-ur Rahman, Kexuan Tang, and Sadaf-Ilyas Kayani
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Transcription, Genetic ,Health, Toxicology and Mutagenesis ,Glutathione reductase ,0211 other engineering and technologies ,Artemisia annua ,02 engineering and technology ,010501 environmental sciences ,Transcripts ,01 natural sciences ,Plant Roots ,Arsenic toxicity ,Antioxidants ,Article ,Terpene ,Ascorbate Peroxidases ,Osmotic Pressure ,Biomass ,P. indica ,0105 earth and related environmental sciences ,Flavonoids ,021110 strategic, defence & security studies ,biology ,Dose-Response Relationship, Drug ,Chemistry ,Basidiomycota ,fungi ,Public Health, Environmental and Occupational Health ,food and beverages ,General Medicine ,Models, Theoretical ,biology.organism_classification ,Pollution ,Artemisinins ,Horticulture ,Catalase ,Shoot ,biology.protein ,Arsenates ,Piriformospora ,Artemisinin ,Peroxidase - Abstract
Aim of the current study was to investigate the effect of exogenously inoculated root endophytic fungus, Piriformospora indica, on molecular, biochemical, morphological and physiological parameters of Artemisia annua L. treated with different concentrations (0, 50, 100 and 150 μmol/L) of arsenic (As) stress. As was significantly accumulated in the roots than shoots of P. indica-inoculated plants. As accumulation and immobilization in the roots is directly associated with the successful fungal colonization that restricts most of As as compared to the aerial parts. A total of 4.1, 11.2 and 25.6 mg/kg dry weight of As was accumulated in the roots of inoculated plants supplemented with 50, 100 and 150 μmol/L of As, respectively as shown by atomic absorption spectroscopy. P. indica showed significant tolerance in vitro to As toxicity even at high concentration. Furthermore, flavonoids, artemisinin and overall biomass were significantly increased in inoculated-stressed plants. Superoxide dismutase and peroxidase activities were increased 1.6 and 1.2 fold, respectively under 150 μmol/L stress in P. indica-colonized plants. Similar trend was followed by ascorbate peroxidase, catalase and glutathione reductase. Like that, phenolic acid and phenolic compounds showed a significant increase in colonized plants as compared to their respective control/un-colonize stressed plants. The real-time PCR revealed that transcriptional levels of artemisinin biosynthesis genes, isoprenoids, terpenes, flavonoids biosynthetic pathway genes and signal molecules were prominently enhanced in inoculated stressed plants than un-inoculated stressed plants., Highlights • The level of artemisinin and flavonoids was increased by P. indica under arsenic stress condition. • P. indica accumulated and restricted arsenic in the roots. • P. indica showed higher tolerance to arsenic in vitro. • Antioxidant defense system and enzymatic activities were enhanced by P. indica.
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- 2020
36. Ensemble Usage for Classification of EEG Signals A Review with Comparison
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Umair Muneer Butt, Sultan Zia, Sukumar Letchmunan, Zaib Unnisa, and Sadaf Ilyas
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business.industry ,Computer science ,05 social sciences ,Decision tree ,Pattern recognition ,Logistic regression ,Ensemble learning ,050105 experimental psychology ,Random forest ,Support vector machine ,Set (abstract data type) ,03 medical and health sciences ,Range (mathematics) ,ComputingMethodologies_PATTERNRECOGNITION ,0302 clinical medicine ,0501 psychology and cognitive sciences ,Artificial intelligence ,business ,030217 neurology & neurosurgery - Abstract
Significance: Ensemble learning is a robust and powerful approach to solve a variety of classification problems. Its usage has increased dramatically in recent years but not seen extensive application in EEG based Brain computer interface (BCI) problems. There is a wide range of classifiers which may not perform well, when used separately for classification problem but outperforms state-of-art algorithm when used as an ensemble, i.e., Long-short Term Memory (LSTM) is considered as best learning algorithms when time is embedded in input but not shown outstanding performance when used individually for EEG classification. On the contrary, it provided real good results when used as an ensemble. Aim: Aim of this study is how EEG signals can be classified using Ensembles methods; its importance and usage are described with experimental results. Approach: The approach that is being used is, combining different classifiers, i.e. Support vector machines, Decision Trees, Random Forest, Long Short Term Memory (LSTM), Logistic Regression (LR) and see which classifiers work best with which ensemble technique for EEG classification’s problem. Datasets: Datasets are taken from well-known data resources, Kaggle, EEG data set of confused students. The second dataset is taken from GitHub having EEG signals with timestamps according to events, i.e., sound, light, etc. According to our results, the LSTM- ensemble outperformed all other algorithms in the case where time is embedded in data.
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- 2020
37. Classification of Non-Discriminant ERD/ERS Comprising Motor Imagery Electroencephalography Signals
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Aneela Abbas, Zaib unnisa Asi, Sadaf Ilyas, Umair Muneer, and Muhammad Sultan
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General Computer Science ,medicine.diagnostic_test ,Computer science ,business.industry ,Feature extraction ,Pattern recognition ,Electroencephalography ,symbols.namesake ,Motor imagery ,Discriminant ,symbols ,medicine ,Artificial intelligence ,Evoked potential ,business ,Classifier (UML) ,Gaussian process ,Brain–computer interface - Abstract
Classification of Motor Imagery (MI) Electroencephalography (EEG) signals has always been an important aspect of Brain Computer Interface (BCI) systems. Event Related Desynchronization (ERD)/ Event Related Synchronization (ERS) plays a significant role in finding discriminant features of MI EEG signals. ERD/ERS is one type and Evoked Potential (EP) is another type of brain response. This study focuses upon the classification of MI EEG signals by Removing Evoked Potential (REP) from non-discriminant MI EEG data in filter band selection, called REP. This optimization is done to enhance the classification performance. A comprehensive comparison of several pipelines is presented by using famous feature extraction methods, namely Common Spatial Pattern (CSP), XDawn. The effectiveness of REP is demonstrated on the PhysioNet dataset which is an online data resource. Comparison is done between the performance of pipelines including proposed one (Common Spatial Pattern (CSP) and Gaussian Process Classifier (GPC)) as well as before and after applying REP. It is observed that the REP approach has improved the classification accuracy of all the subjects used as well as all the pipelines, including state of the art algorithms, up to 20%.
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- 2020
38. Predicting the Future Transaction from Large and Imbalanced Banking Dataset
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Zaib un Nisa, Sultan Zia, Sadaf Ilyas, Sukumar Letchmunan, and Umair Muneer Butt
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021103 operations research ,Boosting (machine learning) ,General Computer Science ,Computer science ,Dimensionality reduction ,0211 other engineering and technologies ,Decision tree ,02 engineering and technology ,Linear discriminant analysis ,computer.software_genre ,Logistic regression ,Random forest ,Exploratory data analysis ,ComputingMethodologies_PATTERNRECOGNITION ,Multilayer perceptron ,0202 electrical engineering, electronic engineering, information engineering ,020201 artificial intelligence & image processing ,Data mining ,Gradient boosting ,AdaBoost ,computer - Abstract
Machine learning (ML) algorithms are being adopted rapidly for a range of applications in the finance industry. In this paper, we used a structured dataset of Santander bank, which is published on a data science and machine learning competition site (kaggle.com) to predict whether a customer would make a transaction or not? The dataset consists of two classes, and it is imbalanced. To handle imbalance as well as to achieve the goal of prediction with the least log loss, we used a variety of methods and algorithms. The provided dataset is partitioned into two sets of 200,000 entries each for training and testing. 50% of data is kept hidden on their server for evaluation of the submission. A detailed exploratory data analysis (EDA) of datasets is performed to check the distributions of values. Correlation between features and importance of characteristics is calculated. To calculate the feature importance, random forest and decision trees are used. Furthermore, principal component analysis and linear discriminant analysis are used for dimensionality reduction. We have used 9 different algorithms including logistic regression (LR), Random forests (RF), Decision tree (DT), Multilayer perceptron (MLP), Gradient boosting method (GBM), Category boost (CatBoost), Extreme gradient boosting (XGBoost), Adaptive boosting (Adaboost) and Light gradient boosting (LigtGBM) method on the dataset. We proposed LighGBM as a regression problem on the dataset and it outperforms the state-of-the-art algorithms with 85% accuracy. Later, we have used fine-tune hyperparameters for our dataset and implemented them in combination with the LighGBM. This tuning improves performance, and we have achieved 89% accuracy.
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- 2020
39. Jasmonate‐ and abscisic acid‐activated AaGSW1‐AaTCP15/AaORA transcriptional cascade promotes artemisinin biosynthesis in Artemisia annua
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Ma, Ya‐Nan, primary, Xu, Dong‐Bei, additional, Yan, Xin, additional, Wu, Zhang‐Kuanyu, additional, Kayani, Sadaf Ilyas, additional, Shen, Qian, additional, Fu, Xue‐Qing, additional, Xie, Li‐Hui, additional, Hao, Xiao‐Long, additional, Hassani, Danial, additional, Li, Ling, additional, Liu, Hang, additional, Pan, Qi‐Fang, additional, Lv, Zong‐You, additional, Liu, Pin, additional, Sun, Xiao‐Fen, additional, and Tang, Ke‐Xuan, additional
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- 2021
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40. The ameliorative effects of exogenous inoculation of Piriformospora indica on molecular, biochemical and physiological parameters of Artemisia annua L. under arsenic stress condition
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Rahman, Saeed-ur-, primary, Khalid, Muhammad, additional, Kayani, Sadaf-Ilyas, additional, and Tang, Kexuan, additional
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- 2020
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41. Light microscopy of PakistaniBerberisleaf cuticles and its taxonomic implications
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Saeed‐ur, Rahman, primary, Khan, Shujaul Mulk, additional, Ahmad, Mushtaq, additional, Zafar, Muhammad, additional, Khan, Raees, additional, Khalid, Muhammad, additional, Nan, Hui, additional, Jan, Farooq, additional, Kayani, Sadaf‐Ilyas, additional, and Hussain, Sajad, additional
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- 2020
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42. The YABBY Family Transcription Factor AaYABBY5 Directly Targets Cytochrome P450 Monooxygenase (CYP71AV1) and Double-Bond Reductase 2 (DBR2) Involved in Artemisinin Biosynthesis in Artemisia Annua
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Yijun Zhong, Kexuan Tang, Ling Li, Qifang Pan, Saeed ur rahman, Chen Tiantian, Xiaofen Sun, Lihui Xie, Yanan Ma, Xueqing Fu, Sadaf-Ilyas Kayani, and Qian Shen
- Subjects
sesquiterpene ,Artemisia annua ,Plant Science ,lcsh:Plant culture ,Reductase ,Sesquiterpene lactone ,chemistry.chemical_compound ,Biosynthesis ,DBR2 ,medicine ,lcsh:SB1-1110 ,Artemisinin ,Original Research ,chemistry.chemical_classification ,biology ,Chemistry ,Jasmonic acid ,Promoter ,Monooxygenase ,biology.organism_classification ,artemisinin ,YABBY family transcription factor ,Biochemistry ,CYP71AV1 ,medicine.drug - Abstract
Artemisinin is an effective antimalarial sesquiterpene lactone synthesized in Artemisia annua. Various transcription factors have been previously reported that can influence the biosynthesis of artemisinin; however, the effect of YABBY family transcription factors on artemisinin biosynthesis was unknown. In the present study, we cloned and characterized AaYABBY5: a homolog of MsYABBY5 in Mentha spicata which is involved in modulating the monoterpenes, as a positive regulator of artemisinin biosynthesis in A. annua. AaYABBY5 was found localized to the nucleus, and its expression was found to be induced by exogenous methyl jasmonic acid (MeJA) treatment. In the dual-luciferase reporter assay, it was found that AaYABBY5 significantly increased the activities of promoters of amorpha-4,11-diene synthase (ADS), cytochrome P450 monooxygenase (CYP71AV1), double-bond reductase 2 (DBR2), and aldehyde dehydrogenase 1 (ALDH1) genes. Yeast one hybrid assay showed that AaYABBY5 directly bonds to the promoters of CYP71AV1 and DBR2 genes. Quantitative real-time polymerase chain reaction (qPCR) of AaYABBY5 overexpression and AaYABBY5 antisense plants revealed a significant increase in the expression of ADS, CYP71AV1, DBR2, and ALDH1 in AaYABBY5 overexpression plants and a significant decrease in the expression of these genes in AaYABBY5 antisense A. annua, respectively. Furthermore, the results of high-performance liquid chromatography (HPLC) showed that the artemisinin and its precursor dihydroartemisinic acid were significantly increased in the AaYABBY5 overexpression plants while AaYABBY5 downregulation resulted in a significant decrease in the concentration of artemisinin. Taken together, these results explicitly represent that AaYABBY5 is a positive regulator of artemisinin biosynthesis in A. annua.
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- 2019
43. Light microscopy of Pakistani Berberis leaf cuticles and its taxonomic implications
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Muhammad Khalid, Mushtaq Ahmad, Muhammad Zafar, Hui Nan, Raees Khan, Rahman Saeed‐ur, Sajad Hussain, Farooq Jan, Sadaf-Ilyas Kayani, and Shujaul Mulk Khan
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Histology ,Berberis ,02 engineering and technology ,Biology ,Plant Epidermis ,03 medical and health sciences ,0302 clinical medicine ,Microscopy ,Botany ,Species identification ,Pakistan ,Instrumentation ,030206 dentistry ,Trichomes ,Stomatal index ,021001 nanoscience & nanotechnology ,biology.organism_classification ,Plant Leaves ,Medical Laboratory Technology ,Plant Stomata ,Microscopy, Electron, Scanning ,Taxonomy (biology) ,Anatomy ,0210 nano-technology ,Taxonomic key - Abstract
Taxonomy of the genus Berberis is quite complex, due to overlapping morphological characters, making it very difficult to differentiate the species within the genus. In order to resolve this taxonomic complexity, the foliar anatomy of 10 Berberis L. species was carried out, for the first time from Pakistan, using light microscopy (LM). Significant variation in terms of epidermal cells shape, size, cell wall pattern, and stomata type was observed. B. baluchistanica has the largest epidermal cells, Adaxial: length = 45-(53.9 ± 3.6)-62.5 μm; and width = 22.5-(26.3 ± 1.3)-30 μm; Abaxial: length = 37.5-(43.25 ± 2.5)-50 μm; and width = 20-(22.6 ± 0.8)-25. The highest number of stomata was observed in B. glaucocarpa as 62 on the abaxial surface while the lowest number of stomata was recorded in B. baluchistanica as 8 on the adaxial surface. Of 10 investigated species, 6 possess anomocytic type stomata, while 2 species that is, B. aitchisonii and B. parkeriana have both anomocytic and anisocytic stomata while B. baluchistanica and B. calliobotrys have only paracytic type stomata. The highest number of cells per unit area was present on the adaxial surface of B. calliobotrys ranging from 245-(252.4)-260 followed by B. parkeriana with 209-(227.8)-250 on the abaxial surface. Stomatal index (SI) also varied considerably and was the lowest (2.6) percentage in B. baluchistanica and highest (31.9) percentage in B. kunawurensis. A taxonomic key based on micro-morphological characters is provided for species identification.
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- 2019
44. Causal Impact Analysis on Android Market
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Ibraheem Afzal, Rana Abdul Rehman, Sadaf Ilyas, Hadiqa AmanUllah, Mishal Fatima, and Umair Muneer
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World Wide Web ,General Computer Science ,Computer science ,Download ,020204 information systems ,mental disorders ,User satisfaction ,0202 electrical engineering, electronic engineering, information engineering ,020207 software engineering ,02 engineering and technology ,Android (operating system) ,health care economics and organizations ,Personalization - Abstract
Google play store contains a large repository of apps for android users. Play store has two billion active users that have two million apps to download and use. App developers are competing to get a higher success rate and increase user satisfaction but little information is known to developers for succeeding in the android market. This paper presents a comprehensive analytical study on Google play store apps ratings, installs and reviews. This study focuses on the evaluation of the parameters required for the success of an app in different categories. For this purpose data of 10k apps and its reviews are analyzed using exploratory data analysis. This study focuses on finding a correlation between higher ratings, no of installs, reviews with app info like its category, size, and price. We are also going to analyze user reviews to get useful insights. The evaluation shows that personalization, productivity and games categories are performing very well in the android market both in terms of ratings and installs. Most high rated apps are sized below 40MB and priced below 30$, except game apps that are performing well even if they are bulky. Common customer complaints are functional errors and issues like infrequent updates, excessive ads, limited functionality and high purchase price.
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- 2019
45. A Cross-Sectional Research On Pictorial And Textual Health Warnings Impact On The Smokers Of Lahore Among The Population (In Quitting, Reducing Or No Change In Smoking Pattern) Of Privileged And Under Privileged Societies In Lahore
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Dr. Saira Munir, Dr. Rabbia Rizvi, Dr. Sadaf Ilyas
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Cross-Sectional Research, Pictorial, Textual Health Warnings, Smokers, Lahore, Privileged and Under Privileged Societies ,behavior and behavior mechanisms ,respiratory tract diseases - Abstract
Objective: The research was aimed at the measurement of the health warning impact reflected on the packs of cigarette on smokers in their act of smoking. Methods: Our research was cross-sectional and it was carried out in Lahore from February to June, 2016, we focused on the male smokers and distributed a self-administrated questionnaire to all the smokers selected through continence non-probability method of sampling without accounting the educational aspect and data was analyzed through SPSS-22. Results: We selected a total of 1500 smoker, warning was observed by 1330 smokers (88.7%); 730 smokers (54.8%) found the picture significant; 630 smokers (47.3%) made an effort to reduce smoking and 430 smokers (32.4%) made a real effort to quit smoking because of the picture and warning impact. In the group of smokers who tried to quit (430), 300 smokers (69.7%) were influenced by the picture. Conclusion: There is no significant and determinant impact of the warning and picture printed on the cigarette packs being sold in Pakistan in quitting and reducing of smoking. Keywords: Cross-Sectional Research, Pictorial, Textual Health Warnings, Smokers, Lahore, Privileged and Under Privileged Societies.
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- 2018
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46. Investigating Methods of Resource Provisioning Mechanisms in Cloud: A Review
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Farheen Jafar, Babur Hayat Malik, Munazza Iftikhar, Talia Anwar, Maryam Malik, Noreen Islam Deen, and Sadaf Ilyas
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Web server ,General Computer Science ,Computer science ,business.industry ,media_common.quotation_subject ,Distributed computing ,020206 networking & telecommunications ,Workload ,Cloud computing ,Provisioning ,02 engineering and technology ,computer.software_genre ,Identification (information) ,Resource (project management) ,0202 electrical engineering, electronic engineering, information engineering ,020201 artificial intelligence & image processing ,Quality (business) ,business ,computer ,media_common - Abstract
Delivering information through cloud computing become a modern computation. For this purpose, electronic device is required to access with an active web server. For delivering different resources, the cloud supplier provides computing power for the cloud users to organize their multiple type of application at any time on different platforms. In cloud computing, the main drawback is relevant to the best use of resources as well as resource provisioning. In cloud computing there is a lack of desired resources that is why the cloud resource provision becomes a daring work. To maintain the quality of services, the provisioning of reasonable resources is need of workloads. The main problem is to find the appropriate workload that depends on the cloud user that is related to resource pair application requirements. This paper reveals the cloud resource provisioning and identification in general and in specific, respectively. In this paper, a methodical analysis of resource provisioning in cloud computing is presented, in which resource provisioning, different types of resource provisioning mechanisms and their comparisons, and benefits are described.
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- 2018
47. From cloud computing to fog computing in Healthcare big data
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Waseem Ur Rehman Khan, Sadaf Ilyas, Babur Hayat Malik, Muhammad Umair Hassan, Faisal Mahmood, Sohail Shahzad, and Muhammad Bilawal Arif
- Subjects
business.industry ,Fog computing ,Computer science ,lcsh:TA1-2040 ,Big data ,Cloud computing ,business ,lcsh:Engineering (General). Civil engineering (General) ,Data science - Abstract
In Healthcare big data, data is originated from various heterogeneous sources. Numerous novel base particular healthcare applications offered to handling source of data from electronic health record (EHR) to medical images. Imaging, Electronic Health Report, technology in light of sensor and numerous different procedures created an immense measure of Healthcare data. Cloud computing development was an excellent paradigm to substantiate big data which incited find of imperceptible examples. Cloud computing is a developing new registering design intended to answer different contending administrations on the Web. Fog Computing is a design style in which arrange segments amongst devices and the cloud execute application-particular rationale. We in this paper investigate, characterize, and talk about various application of cloud and fog computing. We talk about the impact of cloud computing and fog computing on healthcare big data. Cloud base framework for Homediagnosis Service, Fog computing architecture and the justification of moving from cloud to Fog presented comprehensively in this paper.
- Published
- 2018
48. The YABBY Family Transcription Factor AaYABBY5 Directly Targets Cytochrome P450 Monooxygenase (CYP71AV1) and Double-Bond Reductase 2 (DBR2) Involved in Artemisinin Biosynthesis in Artemisia Annua
- Author
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Kayani, Sadaf-Ilyas, primary, Shen, Qian, additional, Ma, Yanan, additional, Fu, Xueqing, additional, Xie, Lihui, additional, Zhong, Yijun, additional, Tiantian, Chen, additional, Pan, Qifang, additional, Li, Ling, additional, Rahman, Saeed-ur, additional, Sun, Xiaofen, additional, and Tang, Kexuan, additional
- Published
- 2019
- Full Text
- View/download PDF
49. Pollen morphological variation of Berberis L. from Pakistan and its systematic importance
- Author
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ur Rahman, Saeed, primary, Khan, Shujaul Mulk, additional, Zafar, Muhammad, additional, Ahmad, Mushtaq, additional, Khan, Raees, additional, Hussain, Sajad, additional, Khalid, Muhammad, additional, and Kayani, Sadaf‐Ilyas, additional
- Published
- 2019
- Full Text
- View/download PDF
50. A cornucopia of screening and diagnostic techniques for human papillomavirus associated cervical carcinomas
- Author
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Noor Ul Ain, Sadia Bano, Memoona Ramzan, Samreen Sarwar, Sadaf Ilyas, Naveed Shahzad, Abdul Rauf Shakoori, and Muhammad Umer
- Subjects
Oncology ,medicine.medical_specialty ,Pathology ,Cost effectiveness ,Cytological Techniques ,Uterine Cervical Neoplasms ,Sensitivity and Specificity ,Asymptomatic ,Virology ,Internal medicine ,medicine ,Humans ,Mass Screening ,Cervix ,Colposcopy ,Cervical cancer ,medicine.diagnostic_test ,Diagnostic Tests, Routine ,Histocytochemistry ,business.industry ,Papillomavirus Infections ,HPV infection ,Cancer ,medicine.disease ,Immunohistochemistry ,medicine.anatomical_structure ,Molecular Diagnostic Techniques ,Positron-Emission Tomography ,Female ,medicine.symptom ,business ,Viral load - Abstract
Cervical carcinoma is one of the major consequences of human papillomavirus (HPV) infections. Although HPV infections of cervix do not always progress to cancer, 90% cases of cervical cancer have been found associated with high risk HPV (hrHPV) infection. Usually, HPV infection is asymptomatic; however, this asymptomatic infection can cause abnormal changes in cervix ultimately leading to cancer development. These changes can be detected by the application of screening tests at regular time intervals. For this purpose, morphological, cytological, and DNA based techniques are available. Nevertheless, abnormal screening tests have only the predictive value for precancerous lesions and thus require further evaluation which is usually done by using diagnostic techniques. So far, colposcopy and histological examination alone were considered as the gold standards for cervical cancer diagnosis. Currently, some tests based on expression level of host cell biomarkers are also being used along with histology for diagnostic purpose. Albeit, these tests have significant specificity and sensitivity values but they are unable to suggest a particular viral genotype involved in infection. Diagnostic methods such as PCR, HPV genotyping assays, microarray, and mRNA based assays are useful to predict the genotypes as well as the quantity of viral load in a host cell. Similarly, these diagnostic procedures have high specificity and sensitivity ranges. However, only few of them are practiced commonly, as approval of these tests as routine diagnostic tests requires clinical validation and cost effectiveness.
- Published
- 2015
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