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Rasool A, Anis I, Bhat SA, Dar MA. Optimizing the NRR activity of single and double boron atom catalysts using a suitable support: a first principles investigation. Phys Chem Chem Phys 2023; 25:22275-22285. [PMID: 37577857 DOI: 10.1039/d3cp02358c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/15/2023]
Abstract
Designing cost effective transition-metal free electrocatalysts for nitrogen fixation under ambient conditions is highly appealing from an industrial point of view. Using density functional theory calculations in combination with the computational hydrogen electrode model, we investigate the N2 activation and reduction activity of ten different model catalysts obtained by supporting single and double boron atoms on five different substrates (viz. GaN, graphene, graphyne, MoS2 and g-C3N4). Our results demonstrate that the single/double boron atom catalysts bind favourably on these substrates, leading to a considerable change in the electronic structure of these materials. The N2 binding and activation results reveal that the substrate plays an important role by promoting the charge transfer from the single/double boron atom catalysts to the antibonding orbitals of *N2 to form strong B-N bonds and subsequently activate the inert NN bond. Double boron atom catalysts supported on graphene, MoS2 and g-C3N4 reveal very high binding energies of -2.38, -2.11 and -1.71 eV respectively, whereas single boron atom catalysts supported on graphene and g-C3N4 monolayers bind N2 with very high binding energies of -1.45 and -2.38 eV, respectively. The N2 binding on these catalysts is further explained by means of orbital projected density of states plots which reflect greater overlap between the N2 and B states for the catalysts, which bind N2 strongly. The simulated reaction pathways reveal that the single and double boron atom catalysts supported on g-C3N4 exhibit excellent catalytic activity with very low limiting potentials of -0.67 and -0.36 V, respectively, while simultaneously suppressing the HER. Thus, the current work provides important insights to advance the design of transition-metal free catalysts for electrochemical nitrogen fixation from an electronic structure point of view.
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Affiliation(s)
- Anjumun Rasool
- Department of Chemistry, Islamic University of Science and Technology, Awantipora, Jammu and Kashmir-192122, India.
| | - Insha Anis
- Department of Chemistry, Islamic University of Science and Technology, Awantipora, Jammu and Kashmir-192122, India.
| | - Sajad Ahmad Bhat
- Department of Chemistry, Islamic University of Science and Technology, Awantipora, Jammu and Kashmir-192122, India.
| | - Manzoor Ahmad Dar
- Department of Chemistry, Islamic University of Science and Technology, Awantipora, Jammu and Kashmir-192122, India.
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Khan A, Kamal T, Saad M, Ameen F, A Bhat S, Ahamad Khan M, Rahman F. Synthesis and antibacterial activity of nanoenhanced conjugate of Ag-doped ZnO nanorods with graphene oxide. Spectrochim Acta A Mol Biomol Spectrosc 2023; 290:122296. [PMID: 36610211 DOI: 10.1016/j.saa.2022.122296] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/16/2022] [Accepted: 12/28/2022] [Indexed: 06/17/2023]
Abstract
In this paper, we report a successful synthesis of ZnO nanorods using the microwave-assisted technique, solid-state reaction method was utilized for the preparation of Zn1-xAgxO (x = 0.05, 0.1), Hummer's modified method for graphene oxide (GO) along with the sonication method to prepare GO-based Ag-doped ZnO (Zn1-xAgxO/GO: x = 0.05, 0.1) nanocomposites. These nanorods and nanocomposites were characterized by X-ray diffraction (XRD), Fourier-transform infrared (FTIR), high-resolution transmission electron microscopy (HRTEM), and Raman spectroscopy for structural properties, scanning electron microscopy (SEM) along with energy dispersive X-ray (EDX) spectroscopy for morphological analysis, and UV-Vis spectroscopy for optical properties. XRD, FTIR, and Raman measurements substantiated that each sample is well crystallized in the single-phase polycrystalline wurtzite hexagonal structure of ZnO. The average crystallite size is found to be in decreasing order ranges 40 nm to 29 nm, respectively, along with a significant reduction in the optical bandgap. The SEM images showed a clear evidence of nanorods of ZnO, while the EDX spectra verified the presence of Zn, Ag, O, and C elements in the synthesized samples with their nominal percentage. Furthermore, the prepared nanocomposites effectively inhibited the growth ofStaphylococcus aureus and Escherichia coli. In comparison to pure ZnO nanorods, GO-based Ag-doped ZnO nanorods showed improved antibacterial activity against both S. aureus and E. coli.
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Affiliation(s)
- Afroz Khan
- Department of Physics, Aligarh Muslim University, Aligarh, UP 202002, India.
| | - Tausif Kamal
- Department of Physics, Aligarh Muslim University, Aligarh, UP 202002, India
| | - Md Saad
- Department of Physics, Aligarh Muslim University, Aligarh, UP 202002, India
| | - Fuad Ameen
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - S A Bhat
- River Basin Research Center, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Mo Ahamad Khan
- Department of Microbiology, Jawaharlal Nehru Medical College, Aligarh Muslim University, Aligarh, UP 202002, India
| | - F Rahman
- Department of Physics, Aligarh Muslim University, Aligarh, UP 202002, India
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Bhat SA, Hasan SK, Parray ZA, Siddiqui ZI, Ansari S, Anwer A, Khan S, Amir F, Mehmankhah M, Islam A, Minuchehr Z, Kazim SN. Potential antiviral activities of chrysin against hepatitis B virus. Gut Pathog 2023; 15:11. [PMID: 36895013 PMCID: PMC9995728 DOI: 10.1186/s13099-023-00531-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Accepted: 01/26/2023] [Indexed: 03/11/2023] Open
Abstract
BACKGROUND Interferon and nucleos(t)ide analogues are current therapeutic treatments for chronic Hepatitis B virus (HBV) infection with the limitations of a functional cure. Chrysin (5, 7-dihydroxyflavone) is a natural flavonoid, known for its antiviral and hepatoprotective activities. However, its anti-HBV activity is unexplored. METHODS In the present study, the anti-hepatitis B activity of chrysin was investigated using the in vitro experimental cell culture model, HepG2 cells. In silico studies were performed where chrysin and lamivudine (used here as a positive control) were docked with high mobility group box 1 protein (HMGB1). For the in vitro studies, wild type HBV genome construct (pHBV 1.3X) was transiently transfected in HepG2. In culture supernatant samples, HBV surface antigen (HBsAg) and Hepatitis B e antigen (HBeAg) were measured by enzyme-linked immunosorbent assay (ELISA). Secreted HBV DNA and intracellular covalently closed circular DNA (cccDNA) were measured by SYBR green real-time PCR. The 3D crystal structure of HMGB1 (1AAB) protein was developed and docked with the chrysin and lamivudine. In silico drug-likeness, Absorption, Distribution, Metabolism, Excretion and Toxicity (ADMET) properties of finest ligands were performed by using SwissADME and admetSAR web servers. RESULTS Data showed that chrysin significantly decreases HBeAg, HBsAg secretion, supernatant HBV DNA and cccDNA, in a dose dependent manner. The docking studies demonstrated HMGB1 as an important target for chrysin as compared to lamivudine. Chrysin revealed high binding affinity and formed a firm kissing complex with HMGB1 (∆G = - 5.7 kcal/mol), as compared to lamivudine (∆G = - 4.3 kcal/mol), which might be responsible for its antiviral activity. CONCLUSIONS The outcome of our study establishes chrysin as a new antiviral against HBV infection. However, using chrysin to treat chronic HBV disease needs further endorsement and optimization by in vivo studies in animal models.
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Affiliation(s)
- Sajad Ahmad Bhat
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, 110025, India
| | - Syed Kazim Hasan
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, 110025, India
| | - Zahoor Ahmad Parray
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, 110025, India
| | - Zaheenul Islam Siddiqui
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, 110025, India
| | - Shabnam Ansari
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, 110025, India.,Department of Biotechnology, Jamia Millia Islamia, New Delhi, India
| | - Ayesha Anwer
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, 110025, India
| | - Saniya Khan
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, 110025, India
| | - Fatima Amir
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, 110025, India.,Department of Biosciences, Jamia Millia Islamia, New Delhi, India
| | - Mahboubeh Mehmankhah
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, 110025, India
| | - Asimul Islam
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, 110025, India
| | - Zarrin Minuchehr
- National Institute of Genetic Engineering and Biotechnology, Tehran, Iran
| | - Syed Naqui Kazim
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, 110025, India.
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Garg VK, Buttar HS, Bhat SA, Ainur N, Priya T, Kashyap D, Tuli HS. Stevens-johnson Syndrome and Toxic Epidermal Necrolysis: An Overview of Diagnosis, Therapy Options and Prognosis of Patients. Recent Adv Inflamm Allergy Drug Discov 2023; 17:110-120. [PMID: 37605396 DOI: 10.2174/2772270817666230821102441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 05/11/2023] [Accepted: 07/11/2023] [Indexed: 08/23/2023]
Abstract
Both Stevens-johnson syndrome (SJS) and Toxic-epidermal necrolysis (TEN) are generally medication-induced pathological conditions that mostly affect the epidermis and mucus membranes. Nearly 1 to 2 patients per 1,000,000 population are affected annually with SJS and TEN, and sometimes these maladies can cause serious life-threatening events. The reported death rates for SJS range from 1 to 5%, and 25 to 35% for TEN. The mortality risk may even be higher among elderly patients, especially in those who are affected by a significant amount of epidermal detachment. More than 50% of TEN patients who survive the illness may experience long-term lower quality of life and lesser life expectancy. The clinical and histopathological conditions of SJS and TEN are characterized by mucocutaneous discomfort, haemorrhagic erosions, erythema, and occasionally severe epidermal separation that can turn into ulcerative patches and dermal necrosis. The relative difference between SJS and TEN is the degree of ulcerative skin detachment, making them two extremes of a spectrum of severe cutaneous adverse drug-induced reactions (cADRs). In the majority of cases, serious drug-related hypercreativities are considered the main cause of SJS & TEN; however, herpes simplex virus and Mycoplasma pneumoniae infections may also produce similar type clinical conditions. The aetiology of a lesser number of cases and their underlying causative factors remain unknown. Among the drugs with a 'greater likelihood' of causing TEN & SJS are carbamazepine (CBZ), trimethoprim-sulfamethoxazole, phenytoin, aminopenicillins, allopurinol, cephalosporins, sulphonamides, antibiotics, quinolones, phenobarbital, and NSAIDs of the oxicam variety. There is also a strong genetic link between the occurrence of SJS and IEN in the Han Chinese population. Such genetic association is based on the human leukocyte antigen (HLA-B*1502) and the co-administration of carbamazepine. The diagnosis of SJS is made mostly on the gross observations of clinical symptoms, and confirmed by the histopathological examination of dermal biopsies of the patients. The differential diagnoses consist of the exclusion of Pemphigus vulgaris, bullous pemphigoid, linear IgA dermatosis, paraneoplastic pemphigus, disseminated fixed bullous drug eruption, acute generalized exanthematous pustulosis (AGEP), and staphylococcal scalded skin syndrome (SSSS). The management of SJS & TEN is rather difficult and complicated, and there is sometimes a high risk of mortality in seriously inflicted patients. Urgent medical attention is needed for early diagnosis, estimation of the SCORTEN prognosis, identification and discontinuation of the causative agent as well as highdose injectable Ig therapeutic interventions along with specialized supportive care. Historical aspects, aetiology, mechanisms, and incidences of SJS and TEN are discussed. An update on the genetic occurrence of these medication-related hypersensitive ailments as well as different therapy options and management of patients is also provided.
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Affiliation(s)
- Vivek Kumar Garg
- Department of Medical Lab Technology, Chandigarh University, Gharuan, Mohali, 140413, India
| | - Harpal Singh Buttar
- Department of Pathology & Laboratory Medicine, University of Ottawa, Faculty of Medicine, Ottawa, Ontario, Canada
| | - Sajad Ahmad Bhat
- Department of Biochemistry, International Medical School, University of International Business (UIB), Almaty, Kazakhstan
| | - Nuftieva Ainur
- Department of Gastroenterology, International Medical School, University of International Business (UIB), Almaty, Kazakhstan
| | - Tannu Priya
- Department of Medical Lab Technology, Chandigarh University, Gharuan, Mohali, 140413, India
| | - Dharambir Kashyap
- Department of Histopathology, Postgraduate Institute of Medical Education and Research (PGIMER), Chandigarh 160012, Punjab, India
| | - Hardeep Singh Tuli
- Department of Biotechnology, Maharishi Markandeshwar (Deemed to be University), Mullana-Ambala 133 207, Haryana, India
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Mirji G, Worth A, Bhat SA, Sayed ME, Kannan T, Goldman AR, Tang HY, Liu Q, Auslander N, Dang CV, Abdel-Mohsen M, Kossenkov A, Stanger BZ, Shinde RS. The microbiome-derived metabolite TMAO drives immune activation and boosts responses to immune checkpoint blockade in pancreatic cancer. Sci Immunol 2022; 7:eabn0704. [PMID: 36083892 PMCID: PMC9925043 DOI: 10.1126/sciimmunol.abn0704] [Citation(s) in RCA: 74] [Impact Index Per Article: 37.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The composition of the gut microbiome can control innate and adaptive immunity and has emerged as a key regulator of tumor growth, especially in the context of immune checkpoint blockade (ICB) therapy. However, the underlying mechanisms for how the microbiome affects tumor growth remain unclear. Pancreatic ductal adenocarcinoma (PDAC) tends to be refractory to therapy, including ICB. Using a nontargeted, liquid chromatography-tandem mass spectrometry-based metabolomic screen, we identified the gut microbe-derived metabolite trimethylamine N-oxide (TMAO), which enhanced antitumor immunity to PDAC. Delivery of TMAO intraperitoneally or via a dietary choline supplement to orthotopic PDAC-bearing mice reduced tumor growth, associated with an immunostimulatory tumor-associated macrophage (TAM) phenotype, and activated effector T cell response in the tumor microenvironment. Mechanistically, TMAO potentiated the type I interferon (IFN) pathway and conferred antitumor effects in a type I IFN-dependent manner. Delivering TMAO-primed macrophages intravenously produced similar antitumor effects. Combining TMAO with ICB (anti-PD1 and/or anti-Tim3) in a mouse model of PDAC significantly reduced tumor burden and improved survival beyond TMAO or ICB alone. Last, the levels of bacteria containing CutC (an enzyme that generates trimethylamine, the TMAO precursor) correlated with long-term survival in patients with PDAC and improved response to anti-PD1 in patients with melanoma. Together, our study identifies the gut microbial metabolite TMAO as a driver of antitumor immunity and lays the groundwork for potential therapeutic strategies targeting TMAO.
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Affiliation(s)
- Gauri Mirji
- Immunology, Microenvironment & Metastasis Program, The Wistar Institute, Philadelphia, PA, USA
| | - Alison Worth
- Immunology, Microenvironment & Metastasis Program, The Wistar Institute, Philadelphia, PA, USA
| | - Sajad Ahmad Bhat
- Immunology, Microenvironment & Metastasis Program, The Wistar Institute, Philadelphia, PA, USA
| | - Mohamed El Sayed
- Immunology, Microenvironment & Metastasis Program, The Wistar Institute, Philadelphia, PA, USA
| | - Toshitha Kannan
- Bioinformatics Facility, The Wistar Institute, Philadelphia, PA, USA
| | - Aaron R Goldman
- Proteomics and Metabolomics Facility, The Wistar Institute, Philadelphia, PA, USA
| | - Hsin-Yao Tang
- Proteomics and Metabolomics Facility, The Wistar Institute, Philadelphia, PA, USA
| | - Qin Liu
- Molecular and Cellular Oncogenesis Program, The Wistar Institute, Philadelphia, PA, USA
| | - Noam Auslander
- Molecular and Cellular Oncogenesis Program, The Wistar Institute, Philadelphia, PA, USA
| | - Chi V Dang
- Molecular and Cellular Oncogenesis Program, The Wistar Institute, Philadelphia, PA, USA
- Ludwig Institute for Cancer Research, New York, NY USA
| | - Mohamed Abdel-Mohsen
- Immunology, Microenvironment & Metastasis Program, The Wistar Institute, Philadelphia, PA, USA
- Vaccine and Immunotherapy Center, The Wistar Institute, Philadelphia, PA, USA
| | - Andrew Kossenkov
- Bioinformatics Facility, The Wistar Institute, Philadelphia, PA, USA
| | - Ben Z Stanger
- Abramson Family Cancer Research Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA; Department of Cell & Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA; Department of Medicine, University of Pennsylvania, Philadelphia, PA, United States; Institute for Regenerative Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Rahul S Shinde
- Immunology, Microenvironment & Metastasis Program, The Wistar Institute, Philadelphia, PA, USA
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Tak AM, Hami A, Bhat B, Bhat SA, Masoodi KZ, Bhat MA, Shah MD, Khan MK, Zargar SM. Unravelling rutin content of tartary buckwheat of north western Himalayas and insights into nucleotide polymorphisms in PAL gene to infer the associations with rutin biosynthesis. 3 Biotech 2022; 12:156. [PMID: 35791410 PMCID: PMC9250572 DOI: 10.1007/s13205-022-03218-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 06/14/2022] [Indexed: 11/25/2022] Open
Abstract
Buckwheat (Fagopyrum spp.) has immense nutritional and nutraceutical potential. All the plant parts of buckwheat possess various metabolites, such as rutin, quercetin, vitexin etc. The high content of rutin in this pseudo cereal crop strongly adapts it to grow under adverse environments. In the present study 50 germplasm lines of Fagopyrum tataricum were used for estimation of seed endosperm rutin content through HPLC. Furthermore, molecular analysis of PAL gene (Phenylalanine Ammonia Lyase), an upstream gene in rutin biosynthesis pathway was targeted for detection of SNPs to understand the variations in the concentrations of seed endosperm rutin content, among tartary buckwheat genotypes with highest and lowest seed endosperm rutin content. Three primer pairs were employed for amplification of PAL gene for F. tartaricum (covering whole gene) followed by sequencing. Rutin concentration in seed endosperm of F. tartaricum ranged from 194.86 to 1403.22 ppm with an average of 617.06 ppm. Highest rutin concentration was found in genotype BWZ90 and lowest in BWZ16. Significant variations were observed in the seed endosperm rutin content among the genotypes of tartary buckwheat. Furthermore, alignment of PAL gene sequences of genotypes with high seed endosperm rutin content and low seed endosperm rutin content revealed variations at 21 polymorphic sites. The amino acid sequences obtained from the nucleotide sequences were also aligned and the variations were detected at 19 positions. The putative protein structure showed conformational changes among predicted proteins from two contrasting genotypes for endosperm rutin content. We here established an inventory of seed endosperm rutin content of tartary buckwheat. This study also provided insights about role of these SNPs in rutin biosynthesis. Furthermore, this information can be used for breeding buckwheat for high metabolite contents. Supplementary Information The online version contains supplementary material available at 10.1007/s13205-022-03218-y.
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Fayaz S, Mahajan R, Hami A, Husaini AM, Bhat SA, Murtaza I, Dhekale B, Bhat BA, Zargar SM. Polyphenolics, antioxidant characterization and DNA barcoding of Kala zeera [Bunium persicum (Boiss.) Fedtsch] through multiple barcode analysis to unravel best barcode combination. Mol Biol Rep 2022; 49:7205-7217. [PMID: 35729477 DOI: 10.1007/s11033-022-07682-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Accepted: 06/07/2022] [Indexed: 11/26/2022]
Abstract
BACKGROUND Kala zeera [Bunium persicum (Boiss.) Fedtsch] is one of the important spice crops of North Western Himalayas with lot of medicinal and culinary values. In spite of having great importance, this crop is under the threat of extinction due to loss of habitat and lack of awareness. The limited availability of the seeds has ultimately increased the economic value of this spice. The upmarket of Kala zeera leads to its adulteration with other black seeds and cumin seeds. The present investigation was undertaken to evaluate polyphenolics and antioxidant properties of Kala zeera genotypes collected from North Western Himalayas and to develop DNA barcodes that can ensure their purity and can also guide in conservation of selected Kala zeera germplasm lines. METHODS AND RESULTS Various locations of North Western Himalayas were explored for collecting 31 diverse germplasm lines of Kala zeera. The collected germplasm was maintained at our experimental stations during 2019-2020 and 2020-2021. These genotypes were evaluated for different seed traits and the methanolic extract from Kala zeera seeds was examined for total phenolic content, total flavonoid content, antioxidant activities by DPPH and FRAP. The results revealed significant variation in seed traits, polyphenolic content and antioxidant properties. 100 seed weight ranged from 0.05 to 0.35 g, TPC ranged from 7.5 to 22.56 mg/g, TFC ranged from 0.58 to 4.15 mg/g, antioxidant properties DPPH ranged from 168 to 624.4 μg/ml and FRAP ranged from 0.72 to 6.91 mg/g. Further, three different barcodes (ITS, rbcL and psbA-trnH) were used to reveal the authenticity of selected Kala zeera. MEGA 5 software was used for clustering and the barcodes did clustering based on geographical distribution of Kala zeera germplasm. CONCLUSION Based on molecular barcoding, best barcode combination was identified that may discriminate the Kala zeera germplasm vis-a-vis can authenticate their purity. Moreover, the identified DNA barcodes will have significant role in studying the evolutionary biology of Bunium species and will be important for designing a strategy to conserve the selected Kala zeera germplasm lines. The identified genotypes with high phenolic content and antioxidant activity can further be utilized in Kala zeera breeding programmes.
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Affiliation(s)
- Salima Fayaz
- Proteomics Laboratory, Division of Plant Biotechnology, Sher-E-Kashmir University of Agricultural Sciences & Technology of Kashmir, Shalimar, Srinagar, Jammu & Kashmir, 190025, India
| | - Reetika Mahajan
- Proteomics Laboratory, Division of Plant Biotechnology, Sher-E-Kashmir University of Agricultural Sciences & Technology of Kashmir, Shalimar, Srinagar, Jammu & Kashmir, 190025, India.
| | - Ammarah Hami
- Proteomics Laboratory, Division of Plant Biotechnology, Sher-E-Kashmir University of Agricultural Sciences & Technology of Kashmir, Shalimar, Srinagar, Jammu & Kashmir, 190025, India
| | - Amjad M Husaini
- Proteomics Laboratory, Division of Plant Biotechnology, Sher-E-Kashmir University of Agricultural Sciences & Technology of Kashmir, Shalimar, Srinagar, Jammu & Kashmir, 190025, India
| | - Sajad Ahmad Bhat
- Division of Basic Science, Sher-E-Kashmir University of Agricultural Sciences & Technology of Kashmir, Shalimar, Srinagar, Jammu & Kashmir, India
| | - Imtiyaz Murtaza
- Division of Basic Science, Sher-E-Kashmir University of Agricultural Sciences & Technology of Kashmir, Shalimar, Srinagar, Jammu & Kashmir, India
| | - Bhagyashree Dhekale
- Division of Agricultural Statistics, Sher-E-Kashmir University of Agricultural Sciences & Technology of Kashmir, Shalimar, Srinagar, Jammu & Kashmir, India
| | - Bilal A Bhat
- MAR&ES, Sher-E-Kashmir University of Agricultural Sciences and Technology of Kashmir, Gurez, Shalimar, Srinagar, Jammu and Kashmir, India
| | - Sajad Majeed Zargar
- Proteomics Laboratory, Division of Plant Biotechnology, Sher-E-Kashmir University of Agricultural Sciences & Technology of Kashmir, Shalimar, Srinagar, Jammu & Kashmir, 190025, India.
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Ahmad Bhat S, Islam Siddiqui Z, Ahmad Parray Z, Sultan A, Afroz M, Ali Azam S, Rahman Farooqui S, Naqui Kazim S. Naturally occurring HMGB1 inhibitor delineating the anti-hepatitis B virus mechanism of glycyrrhizin via in vitro and in silico studies. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Anwer A, Khan S, Amir F, Bhat SA, Azam SA, Hasan SK, Afroz M, Waseem R, Islam A, Parveen S, Kazim SN. Novel chimeric vectors harboring hepatitis B viral promoter and reporter gene demonstrated liver-specific significance. Future Virol 2022. [DOI: 10.2217/fvl-2021-0259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Aim: Expression of EGFP was investigated to ascertain the strength and specificity of CMV, U6 and hepatitis B virus (HBV) core promoters in hepatic and non-hepatic cells. Materials and methods: pSilencer-2.1 plasmid vector is known for siRNA-based inhibition. To achieve target-specific correction of disease-causing genes, pSilencer-GFP was constructed. For liver specific expression of therapeutic genes, endogenous U6 promoter of pSilencer-2.1 was replaced with HBV core promoter and ubiquitously active CMV promoter. Results: Transfection results showed that GFP expression under the control of HBV core promoter was higher in hepatic Hep3B than non-hepatic HEK293T cells. Conclusion: HBV core promoter could lead to specific expression in hepatocytes, which might be used in gene therapy of liver diseases as well as for siRNA-based therapeutic strategies.
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Affiliation(s)
- Ayesha Anwer
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, 110025, India
| | - Saniya Khan
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, 110025, India
| | - Fatima Amir
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, 110025, India
| | - Sajad Ahmad Bhat
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, 110025, India
| | - Syed Ali Azam
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, 110025, India
| | - Syed Kazim Hasan
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, 110025, India
| | - Masarrat Afroz
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, 110025, India
| | - Rashid Waseem
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, 110025, India
| | - Asimul Islam
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, 110025, India
| | - Shama Parveen
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, 110025, India
| | - Syed Naqui Kazim
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, New Delhi, 110025, India
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Madhok A, Bhat SA, Philip CS, Sureshbabu SK, Chiplunkar S, Galande S. Transcriptome Signature of Vγ9Vδ2 T Cells Treated With Phosphoantigens and Notch Inhibitor Reveals Interplay Between TCR and Notch Signaling Pathways. Front Immunol 2021; 12:660361. [PMID: 34526984 PMCID: PMC8435775 DOI: 10.3389/fimmu.2021.660361] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 08/05/2021] [Indexed: 11/13/2022] Open
Abstract
Gamma delta (γδ) T cells, especially the Vγ9Vδ2 subtype, have been implicated in cancer therapy and thus have earned the spotlight in the past decade. Although one of the most important properties of γδ T cells is their activation by phosphoantigens, which are intermediates of the Mevalonate and Rohmer pathway of isoprenoid biosynthesis, such as IPP and HDMAPP, respectively, the global effects of such treatments on Vγ9Vδ2 T cells remain elusive. Here, we used the high-throughput transcriptomics approach to elucidate the transcriptional changes in human Vγ9Vδ2 T cells upon HDMAPP, IPP, and anti-CD3 treatments in combination with interleukin 2 (IL2) cytokine stimulation. These activation treatments exhibited a dramatic surge in transcription with distinctly enriched pathways. We further assessed the transcriptional dynamics upon inhibition of Notch signaling coupled with activation treatments. We observed that the metabolic processes are most affected upon Notch inhibition via GSI-X. The key effector genes involved in gamma-delta cytotoxic function were downregulated upon Notch blockade even in combination with activation treatment, suggesting a transcriptional crosstalk between T-cell receptor (TCR) signaling and Notch signaling in Vγ9Vδ2 T cells. Collectively, we demonstrate the effect of the activation of TCR signaling by phosphoantigens or anti-CD3 on the transcriptional status of Vγ9Vδ2 T cells along with IL2 stimulation. We further show that the blockade of Notch signaling antagonistically affects this activation.
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Affiliation(s)
- Ayush Madhok
- Centre of Excellence in Epigenetics, Department of Biology, Indian Institute of Science and Education and Research (IISER), Pune, India
| | - Sajad Ahmad Bhat
- Advanced Centre for Treatment, Research and Education in Cancer (ACTREC), Tata Memorial Centre, Navi Mumbai, India.,Homi Bhabha National Institute (HBNI), Mumbai, India
| | - Chinna Susan Philip
- Advanced Centre for Treatment, Research and Education in Cancer (ACTREC), Tata Memorial Centre, Navi Mumbai, India.,Homi Bhabha National Institute (HBNI), Mumbai, India
| | - Shalini Kashipathi Sureshbabu
- Advanced Centre for Treatment, Research and Education in Cancer (ACTREC), Tata Memorial Centre, Navi Mumbai, India.,Homi Bhabha National Institute (HBNI), Mumbai, India
| | - Shubhada Chiplunkar
- Advanced Centre for Treatment, Research and Education in Cancer (ACTREC), Tata Memorial Centre, Navi Mumbai, India.,Homi Bhabha National Institute (HBNI), Mumbai, India
| | - Sanjeev Galande
- Centre of Excellence in Epigenetics, Department of Biology, Indian Institute of Science and Education and Research (IISER), Pune, India.,Department of Life Sciences, School of Natural Sciences, Shiv Nadar University, Greater Noida, India
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11
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Manzoor M, Zargar SM, Akhter P, Urwat U, Mahajan R, Bhat SA, Dar TA, Khan I. Morphological, Biochemical, and Proteomic Studies Revealed Impact of Fe and P Crosstalk on Root Development in Phaseolus vulgaris L. Appl Biochem Biotechnol 2021; 193:3898-3914. [PMID: 34524636 DOI: 10.1007/s12010-021-03662-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 09/03/2021] [Indexed: 10/20/2022]
Abstract
Mineral stress is one of the major abiotic stresses faced by crop plants. The present study was undertaken to investigate the impact of mineral stress (iron (Fe) and phosphorus (P)) on various morphological and biochemical responses of the shoot and root tissues and root architecture of common bean (Phaseolus vulgaris L.). This study also leads us to the identification of P stress responsive proteins. The study was conducted under in vitro conditions, in which seeds of Shalimar French Bean-1 (SFB-1) variety were cultured on four different MGRL medium (control (P1Fe1), iron deficient (P1Fe0), phosphorus deficient (P0Fe1), and phosphorus and iron deficient (P0Fe0)). Chlorophyll content of leaves, Fe/P content of root tissues, total sugars, proline, length, and weight of shoot and root tissues were assessed and compared within and between the treatments. The analyzed data revealed significant difference between control and other three treatments. Chlorophyll content of shoots was found significantly decreased under mineral stress treatments P0Fe1, P1Fe0, and P0Fe0 than control. Length and weight of shoot and root were also observed significantly decreased under P0Fe1, P1Fe0, and P0Fe0 as compared to control. Total sugar was significantly higher in P0Fe1 of roots in comparison to control. Proline content was significantly higher in both tissues of shoots and roots of plants grown under P1Fe0, P0Fe1, and P0Fe0 than control condition. Furthermore, we unexpectedly observed the recovery of roots (mainly primary roots) under P0Fe0 as compared to P1Fe0 and P0Fe1. Interestingly higher concentration of Fe was also observed in P0Fe1 compared to other treatments and also higher concentration of P was observed in P1Fe1. These findings suggested that there is a crosstalk between Fe and P and also revealed that there is a disruption in the ability of PR (primary root) to sense local P deficiency in the absence of Fe. Furthermore, proteomics analysis (SDS-PAGE followed by MALDI MS) helped in identification of defensive proteins in P stress condition compared to control.
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Affiliation(s)
- Madhiya Manzoor
- Proteomics Laboratory, Division of Plant Biotechnology, Sher-E-Kashmir University of Agricultural Sciences & Technology of Kashmir, Shalimar, Srinagar, Jammu & Kashmir, India, 190025
| | - Sajad Majeed Zargar
- Proteomics Laboratory, Division of Plant Biotechnology, Sher-E-Kashmir University of Agricultural Sciences & Technology of Kashmir, Shalimar, Srinagar, Jammu & Kashmir, India, 190025.
| | - Parveen Akhter
- Proteomics Laboratory, Division of Plant Biotechnology, Sher-E-Kashmir University of Agricultural Sciences & Technology of Kashmir, Shalimar, Srinagar, Jammu & Kashmir, India, 190025
| | - Uneeb Urwat
- Proteomics Laboratory, Division of Plant Biotechnology, Sher-E-Kashmir University of Agricultural Sciences & Technology of Kashmir, Shalimar, Srinagar, Jammu & Kashmir, India, 190025
| | - Reetika Mahajan
- Proteomics Laboratory, Division of Plant Biotechnology, Sher-E-Kashmir University of Agricultural Sciences & Technology of Kashmir, Shalimar, Srinagar, Jammu & Kashmir, India, 190025
| | - Sajad Ahmad Bhat
- Division of Basic Science, Sher-E-Kashmir University of Agricultural Sciences & Technology of Kashmir, Shalimar, Srinagar, Jammu & Kashmir, India
| | - Tanveer Ali Dar
- Department of Clinical Biochemistry, University of Kashmir, Hazratbal, Srinagar, Jammu & Kashmir, India
| | - Imran Khan
- Division of Agricultural Statistics, Sher-E-Kashmir University of Agricultural Sciences & Technology of Kashmir, Shalimar, Srinagar, Jammu & Kashmir, India
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12
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Sarwar Ahmad Pandit, Rather MA, Bhat SA, Ingole PP, Bhat MA. Vitamin B12 Plus Graphene Based Bio-Electrocatalyst for Electroreduction of Halocarbons in 1-Butyl-3-Methylimidazolium Tetrafluoroborate: A Special Use of the Synergism between Graphene, Ionic Liquid and Vitamin B12. RUSS J ELECTROCHEM+ 2021. [DOI: 10.1134/s1023193521030101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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13
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Shafat Khan M, Khanam R, Ahmad Bhat S, Sidiq N, Ismail T, Ingole PP, Pinjari RV, Ahmad Bhat M. Exploiting the unique specialty of hydrazone functionality: Synthesis of a highly sensitive UV-Vis active solvatochromic probe. Spectrochim Acta A Mol Biomol Spectrosc 2021; 247:119154. [PMID: 33189977 DOI: 10.1016/j.saa.2020.119154] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 10/18/2020] [Accepted: 10/26/2020] [Indexed: 06/11/2023]
Abstract
The unique physico-chemical attributes of the hydrazone functionality have been extensively studied for a diverse range of chemical, biological and analytical applications. The synthesis of a highly sensitive hydrazone based UV-Vis active solvatochromic probe that exhibits excellent sensitivity toward sensing of solvent polarity, microstructural changes and onset of micellization in aqueous systems was carried out. Specifically, synthesis of 2,4-dinitrophenyl-2-(2-nitrobenzylidene)hydrazone (DNPNBH), through an easy to carry, atom economical, one-pot single step approach via use of low-cost precursors viz. ortho-nitrobenzaldehyde and 2,4-dinitrophenyl hydrazine is presented. The UV-Vis absorption features of the synthesized hydrazone exhibit excellent sensitivity toward the polarity of its immediate microenvironment. The microenvironment polarity sensing potential of DNPNBH is demonstrated for some single solvent systems and DMF-Water mixture as a model binary solvent system and the results are supported by quantum mechanical calculations. Use of the DNPNBH as a probe (at concentrations many orders lower than required for conventional probes) to precisely reflect the onset of micellization and estimation of critical micelle concentration (CMC) of amphiphilic molecules (5.25 mM for SDS, 1.53 mM for CTAB and 0.055 mM for Brij56) in aqueous solutions is also demonstrated. The results clearly qualify the synthesized hydrazone as a highly sensitive UV-Vis probe that can be employed for reliable sensing of solvent polarity, composition dependence of physicochemical attributes in mixed solvent systems and the estimation of CMC of surfactant systems via spectrophotometry.
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Affiliation(s)
- Mudeha Shafat Khan
- Department of Chemistry, University of Kashmir, Hazratbal Srinagar 190006, India
| | - Romana Khanam
- Department of Chemistry, University of Kashmir, Hazratbal Srinagar 190006, India
| | - Sajad Ahmad Bhat
- Department of Chemistry, University of Kashmir, Hazratbal Srinagar 190006, India
| | - Naheed Sidiq
- Department of Chemistry and Earth Sciences, Qatar University, Doha 2713, Qatar
| | - Tabasum Ismail
- Department of Chemistry, SP College, Srinagar 190001, J & K, India
| | - Pravin P Ingole
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Rahul V Pinjari
- School of Chemical Sciences, Swami Ramanand Teerth Marathwada University, Nanded 431606, India
| | - Mohsin Ahmad Bhat
- Department of Chemistry, University of Kashmir, Hazratbal Srinagar 190006, India.
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14
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Pandit SA, Bhat SA, Ingole PP, Bhat MA. Aqueous micellar solutions of Imidazolium based surface active ionic liquids: Promising solvent systems to boost the electrocatalytic performance of Vitamin B12 toward eco-green electro-detoxification of halocarbons. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2020.137655] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Wani AA, Bhat MM, Sofi FA, Bhat SA, Ingole PP, Rashid N, Bhat MA. Nano-spinel cobalt decorated sulphur doped graphene: an efficient and durable electrocatalyst for oxygen evolution reaction and non-enzymatic sensing of H 2O 2. NEW J CHEM 2021. [DOI: 10.1039/d1nj02383g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
We report the synthesis of a nano-spinel cobalt decorated sulphur doped reduced graphene oxide (Co@S–rGO) composite exhibiting excellent electrocatalytic performance and electrochemical stability toward oxygen evolution reaction in an alkaline medium.
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Affiliation(s)
- Adil Amin Wani
- Department of Chemistry, University of Kashmir, Hazratbal Srinagar, India
| | | | - Feroz Ahmad Sofi
- Department of Chemistry, University of Kashmir, Hazratbal Srinagar, India
| | - Sajad Ahmad Bhat
- Department of Chemistry, University of Kashmir, Hazratbal Srinagar, India
| | - Pravin P. Ingole
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi-110016, India
| | - Nusrat Rashid
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi-110016, India
| | - Mohsin Ahmad Bhat
- Department of Chemistry, University of Kashmir, Hazratbal Srinagar, India
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16
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Khan M, Wani AA, Ismail T, Bhat SA, Sofi FA, Bhat MA. Eureka Moment: An Archimedean Alternative for the Determination of cmc of Surfactants via Weight Measurements. ACS Omega 2020; 5:31640-31643. [PMID: 33344815 PMCID: PMC7745210 DOI: 10.1021/acsomega.0c04029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Accepted: 11/17/2020] [Indexed: 06/12/2023]
Abstract
Critical micelle concentration (cmc) is a key parameter of generally used surfactants, and many experimental techniques like tensiometry, conductivity, spectrophotometry, fluorometry, etc. for its determination have been reported. However, these contemporary methods for cmc determination are tedious, are time-consuming, are sensitive, and require sophisticated instrumentation. Herein, we demonstrate that the cmc of the surfactants can be estimated via monitoring the variation in the apparent weight of a density bottle floating in a surfactant solution as a function of surfactant concentration. The proposed method requires the use of a simple weighing balance; a cost-affordable instrument always available in scientific laboratories. The proposed method is simple to execute and does not require any complicated data analysis procedures. As an experimental proof attached to the claim, we demonstrate the estimation of the cmcs of all types of surfactants, viz., anionic, cationic, and nonionic, through the formulated method. The results obtained in terms of cmc values of the chosen surfactants closely match those reported through the use of different standardized protocols. The formulated experimental protocol is desirable in terms of the simplicity of the protocol, accuracy, and reproducibility of the results, and cost and accessibility of the required instrument. All these attributes of the presented protocol qualify it as an appropriate substitute to the modern techniques commonly used for the cmc determination.
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Affiliation(s)
- Mudeha
Shafat Khan
- Department
of Chemistry, University of Kashmir, Srinagar 190006, J & K, India
| | - Adil Amin Wani
- Department
of Chemistry, University of Kashmir, Srinagar 190006, J & K, India
| | - Tabasum Ismail
- Department
of Chemistry, SP College, Srinagar190001, J & K, India
| | - Sajad Ahmad Bhat
- School
Education Department, Govt. Higher Secondary
School Chowgam, Kulgam 192231, J & K, India
| | - Feroz Ahmad Sofi
- Department
of Chemistry, University of Kashmir, Srinagar 190006, J & K, India
| | - Mohsin Ahmad Bhat
- Department
of Chemistry, University of Kashmir, Srinagar 190006, J & K, India
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17
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Ansari S, Maaz M, Ahmad I, Hasan SK, Bhat SA, Naqui SK, Husain M. Quality control, HPTLC analysis, antioxidant and antimicrobial activity of hydroalcoholic extract of roots of qust ( Saussurea lappa, C.B Clarke). Drug Metab Pers Ther 2020; 0:dmdi-2020-0159. [PMID: 33780194 DOI: 10.1515/dmdi-2020-0159] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 11/09/2020] [Indexed: 11/15/2022]
Abstract
OBJECTIVES Saussurea lappa, CB Clarke (S.lappa) is a perennial herb of the Compositae family. The root of S.lappa has been used for the treatment of various diseases such as hepatitis, jaundice, intestinal worms, bronchial asthma, and a variety of skin diseases. The aim of the study was to ensure quality control of S.lappa and its preparation HAESL (hydroalcoholic extract of S.lappa) along with assessment of HAESL antimicrobial and antioxidant activities in vitro. METHODS HAESL was prepared with 50% ethanol, (v/v). Physiochemical analysis of the root of S.lappa, and phytochemical screening, thin-layer chromatography (TLC), high-performance thin-layer chromatography (HPTLC), and in vitro antimicrobial and antioxidant activity of HAESL were performed using the standard protocol. RESULTS Physiochemical and phytochemical assessments of S.lappa and HAESL showed the greater quality of the drug. HAESL showed the presence of many phytochemical constituents corresponding to colorful spots, peaks, area under the curve, and corresponding Rf values as evident in the TLC and HPTLC analysis. HAESL showed a concentration-dependent effect on radical scavenging activity against DPHH (2,2-diphenyl-1-picrylhydrazyl) and hydroxyl radical with IC50 value of 19.10 μg/mL and 82.23 μg/mL, respectively. HAESL exhibited antimicrobial activity against the growth of micro-organisms such as Escherichia coli, Staphylococcus aureus, Klebsiella pneumoniae, Pseudomonas aeruginosa, Salmonella typhi, Aspergillus flavus, and Candida albicans. HASEL showed no antimicrobial activity against Aspergillus niger. CONCLUSIONS The procured and an identified sample of Saussurea lappa was good in quality and the prepared HAESL contained many phytochemical compounds. HAESL substantiated significant antioxidant and antimicrobial activity in vitro.
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Affiliation(s)
- Shabnam Ansari
- Department of Biotechnology, Faculty of Natural Sciences, Jamia Millia Islamia, New Delhi, India
| | - Mohammad Maaz
- School of Unani Medical Education and Research, Jamia Hamdard, New Delhi, India
| | - Iftekhar Ahmad
- School of Pharmaceutical Sciences and Research, Jamia Hamdard, New Delhi, India
| | - Syed Kazim Hasan
- Center for Interdisciplinary Research in Basic Sciences, Faculty of Natural Sciences, Jamia Millia Islamia, New Delhi, India
| | - Sajad Ahmad Bhat
- Center for Interdisciplinary Research in Basic Sciences, Faculty of Natural Sciences, Jamia Millia Islamia, New Delhi, India
| | - Syed Kazim Naqui
- Center for Interdisciplinary Research in Basic Sciences, Faculty of Natural Sciences, Jamia Millia Islamia, New Delhi, India
| | - Mohammad Husain
- Department of Biotechnology, Faculty of Natural Sciences, Jamia Millia Islamia, New Delhi, India
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18
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Pandit SA, Bhat SA, Rather MA, Ingole PP, Bhat MA. Mechanistic insight into the electrocatalytic performance of reduced graphene oxide supported palladium, silver and palladium-silver nanodeposits toward electro-dehalogenation of halocarbons in room temperature ionic liquids. Phys Chem Chem Phys 2020; 22:16985-16997. [PMID: 32676629 DOI: 10.1039/d0cp01932a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Herein, we report the results from our extensive voltammetric investigations designed to explore, assess and explain the electrocatalytic performance of reduced graphene oxide supported metal nano-deposits toward the electro-dehalogenation of halocarbons in room temperature ionic liquids (RTILs). Specifically, we investigated the electro-reductive dechlorination of the model halocarbon, carbon tetrachloride over glassy carbon electrode (GCE) and palladium-graphene (Pd-Gr), silver-graphene (Ag-Gr) and palladium-silver-graphene (PdAg-Gr) nanocomposites in 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([BMIM][NTf2]). Analysis of the voltammetric data in light of Marcus-Hush formulation reveals that the electro-reductive cleavage of the C-Cl bond of CCl4 over GCE in [BMIM][NTf2] follows a sticky dissociative electron transfer (SDET) pathway. The significantly stronger interaction energy between electrogenerated Cl- and CCl3˙ (radical) fragments in RTILs makes electroreduction of CCl4 in [BMIM][NTf2] much easier than in organic solvents. The activation-driving force relationship for electro-catalytic dechlorination of CCl4 over Pd-Gr was observed to follow a modified sticky dissociative electron transfer model wherein apart from the ion-radical interaction, the adsorptive interaction of chlorinated species with the electrocatalytic surface needs to be taken into consideration to account for the apparent activation energy-driving force dependence. Interestingly the activation energy-driving force relationships for the electroreduction of CCl4 over Ag-Gr and PdAg-Gr were observed to fit a modified stepwise ET (MSET) pathway. In the MSET pathway, the adsorption and the implied free energy change of the electroreducible halocarbon significantly alter the solvent re-organization energy and the inherent barrier for the heterogeneous ET process. The adsorptive interaction and hence the electrocatalytic performance of PdAg-Gr were observed to be more than that observed for Ag-Gr. This is attributed to the Ag to Pd charge transfer in the PdAg-Gr nanodeposits. Our results besides underlining the positive influence of RTILs in facilitating the electroreductive detoxification of halocarbons, very well establish the mechanistic basis for the electrocatalytic performance of graphene based nanodeposits toward electrodehalogenation of halocarbons.
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Butt FA, Bhat PA, Bhat SA, Rashid N, Rather MA, Pandit SA, Ingole PP, Rather GM, Bhat MA. Transforming micelles into mixed micelles: a promising approach to tune the catalytic performance of imidazolium-based surface active ionic liquids toward degradation of rhodamine B. Phys Chem Chem Phys 2020; 22:11337-11347. [PMID: 32373796 DOI: 10.1039/c9cp07040k] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
Herein, we demonstrate that the catalytic performance of imidazolium-based surface-active ionic liquid (SAIL) micelles can be significantly enhanced through the addition of an appropriate type and amount of intelligently conceived amphiphile to form mixed micelles. Specifically, we show that the catalytic performance of 1-dodecyl-3-methyl imidazolium chloride (DDMIMCl) micelles toward the reductive degradation of rhodamine B (RhB), a carcinogenic dye extensively used in multiple industrial applications, can be appreciably boosted through addition of Brij56, a nonionic surfactant. Detailed kinetic investigations on the catalytic performance of pre- and post-micellar concentrations of DDMIMCl and its mixed micelles with Brij56 over various mole fractions, toward the reductive degradation of RhB, are presented. The data analyzed in light of Berezin's kinetic model suggest that the addition of Brij56 to DDMIMCl micelles significantly enhances their catalytic performance. The catalytic activity exhibited by the DDMIMCl-Brij56 (XBrij56 = 0.2) mixed micellar system is better than that reported for many state-of-the-art nanoparticle/homogenous catalysts. The results explained in light of Berezin's kinetic model are well supported by physico-chemical studies like conductometry, fluorimetry and dynamic light scattering. The presented results anticipate stimulation of extensive research activity for exploiting the mixed micellization approach as a novel avenue for modulating the catalytic performance of SAILs.
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Affiliation(s)
- Fayaz Ahmed Butt
- Department of Chemistry, University of Kashmir, Srinagar-190006, Jammu and Kashmir, India.
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20
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Bhat SA, Rashid N, Rather MA, Pandit SA, Ingole PP, Bhat MA. Vitamin B12 functionalized N-Doped graphene: A promising electro-catalyst for hydrogen evolution and electro-oxidative sensing of H2O2. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.135730] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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21
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Bhat SA, Rashid N, Rather MA, Pandit SA, Rather GM, Ingole PP, Bhat MA. PdAg Bimetallic Nanoalloy-Decorated Graphene: A Nanohybrid with Unprecedented Electrocatalytic, Catalytic, and Sensing Activities. ACS Appl Mater Interfaces 2018; 10:16376-16389. [PMID: 29658695 DOI: 10.1021/acsami.8b00510] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Recent reports about the promising and tunable electrocatalytic activity and stability of nanoalloys have stimulated an intense research activity toward the design and synthesis of homogeneously alloyed novel bimetallic nanoelectrocatalysts. We herein present a simple one-pot facile wet-chemical approach for the deposition of high-quality bimetallic palladium-silver (PdAg) homogeneous nanoalloy crystals on reduced graphene (Gr) oxide sheets. Morphological, structural, and chemical characterizations of the so-crafted nanohybrids establish a homogeneous distribution of 1:1 PdAg nanoalloy crystals supported over reduced graphene oxide (PdAg-Gr). The PdAg-Gr nanohybrids exhibit outstanding electrocatalytic, catalytic, and electroanalytical performances. The PdAg-Gr samples were found to exhibit exceptional durability when subjected to repeated potential cycles or long-term electrolysis. In the CVs recorded for fuel cell reactions, viz. methanol oxidation reaction and oxygen reduction reaction, and for detoxification of environmental pollutants, viz. electroreduction of methyl iodide and chloroacetonitrile over PdAg-Gr with potential sweep rate of 25 mVs-1, the peak potentials were observed to be just -0.221, -0.297, (vs Ag/AgCl, 3 M KCl) -1.508, and -1.189 V (vs Fc+/Fc), respectively. The potential of PdAg-Gr nanohybrid for simultaneous and sensitive electrochemical sensing and estimation of hydroxybenzene isomers with very low detection limits (0.05 μM for hydroquinone, 0.06 μM for catechol, 6.7 nM for 4-aminophenol, and 13.7 nM for 2-aminophenol) is demonstrated. Additionally, PdAg-Gr was observed to offer excellent solution-phase catalytic performance in bringing about the reduction of notorious environmental pollutant 4-nitrophenol to pharmaceutically important 4-aminophenol with an apparent rate constant ( kapp) of 3.106 × 10-2 s-1 and a normalized rate constant ( knor) of 6.21 × 102 s-1 g-1. The presented synthetic scheme besides being high yielding, low cost, and easy to carry out results in the production of PdAg-Gr nanohybrids with stability and activity significantly better than most of the nanomaterials purposefully designed and testified so far by various groups.
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Affiliation(s)
- Sajad Ahmad Bhat
- Department of Chemistry , University of Kashmir , Srinagar 190006 , J&K , India
| | - Nusrat Rashid
- Department of Chemistry , Indian Institute of Technology Delhi , New Delhi 110016 , India
| | | | - Sarwar Ahmad Pandit
- Department of Chemistry , University of Kashmir , Srinagar 190006 , J&K , India
| | | | - Pravin P Ingole
- Department of Chemistry , Indian Institute of Technology Delhi , New Delhi 110016 , India
| | - Mohsin Ahmad Bhat
- Department of Chemistry , University of Kashmir , Srinagar 190006 , J&K , India
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Pandit SA, Rather MA, Bhat SA, Jan R, Rather GM, Bhat MA. An Insight into a Fascinating DMF-Water Mixed Solvent System: Physicochemical and Electrochemical Studies. ChemistrySelect 2017. [DOI: 10.1002/slct.201700553] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | | | - Sajad Ahmad Bhat
- Department of Chemistry; University of Kashmir; Srinagar- 190006, J&K India
| | - Roohi Jan
- Department of Chemistry; University of Kashmir; Srinagar- 190006, J&K India
| | - Ghulam Mohd Rather
- Department of Chemistry; University of Kashmir; Srinagar- 190006, J&K India
| | - Mohsin Ahmad Bhat
- Department of Chemistry; University of Kashmir; Srinagar- 190006, J&K India
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23
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Bhat SA, Singh NK, Singh H, Rath SS. Molecular prevalence of Babesia bigemina in Rhipicephalus microplus ticks infesting cross-bred cattle of Punjab, India. Parasite Epidemiol Control 2017; 2:85-90. [PMID: 29774285 PMCID: PMC5952690 DOI: 10.1016/j.parepi.2017.04.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 02/10/2017] [Accepted: 04/10/2017] [Indexed: 11/28/2022] Open
Abstract
Babesiosis is an economically important tick-borne apicomplexan protozoan disease of cattle in tropical and subtropical regions. In the present study, Rhipicephalus microplus engorged female ticks were collected from 135 apparently healthy cattle from different agro-climatic zones of Punjab, India, to investigate the carrier status of Babesia bigemina infection in vector tick by using microscopy and PCR based assays. PCR when applied on DNA extracted from the egg masses harvested from ticks showed 1.48% (2/135) samples as positive, whereas 4.44% (6/135) samples were positive when product of primary PCR was used as template in nPCR. Further, among the DNA samples isolated from the unfed larval stages that emerged from egg masses laid by ticks, only 1.48% (2/135) samples were detected as positive for B. bigemina in PCR, while 7.41% (10/135) samples were detected positive in nPCR assay. Statistically, non-significant (p > 0.05) difference in prevalence rates was observed across different agro-climatic zones and between different age groups of cattle from which engorged ticks were collected. It can, thus, be concluded that prevalence of B. bigemina in the vector tick, R. microplus in Punjab state of India indicates an endemic status of the organism and a further study is needed for the management and control of the bovine babesiosis.
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Affiliation(s)
- S A Bhat
- Department of Veterinary Parasitology, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, 141 004, Punjab, India
| | - N K Singh
- Department of Veterinary Parasitology, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, 141 004, Punjab, India
| | - H Singh
- Department of Veterinary Parasitology, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, 141 004, Punjab, India
| | - S S Rath
- Department of Veterinary Parasitology, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, 141 004, Punjab, India
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Rather MA, Bhat SA, Pandit SA, Rather GM, Khan KZ, Bhat MA. Imidazolium Based Surface Active Ionic Liquids as Novel Micellar Media for Simultaneous and Sensitive Electrochemical Detection of Dopamine and Ascorbic Acid. ELECTROANAL 2017. [DOI: 10.1002/elan.201700047] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | - Sajad Ahmad Bhat
- Department of Chemistry; University of Kashmir; Srinagar- 190006, J & K India
| | - Sarwar Ahmad Pandit
- Department of Chemistry; University of Kashmir; Srinagar- 190006, J & K India
| | | | - Khaliquz Zaman Khan
- Department of Chemistry; University of Kashmir; Srinagar- 190006, J & K India
| | - Mohsin Ahmad Bhat
- Department of Chemistry; University of Kashmir; Srinagar- 190006, J & K India
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Bhat SA, Pandit SA, Rather MA, Rather GM, Rashid N, Ingole PP, Bhat MA. Self-assembled AuNPs on sulphur-doped graphene: a dual and highly efficient electrochemical sensor for nitrite (NO2−) and nitric oxide (NO). NEW J CHEM 2017. [DOI: 10.1039/c7nj01565h] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Gold nanoparticles self-assembled over sulphur-doped graphene as a reusable electrocatalyst for selective and sensitive quantification of NO2− and NO.
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Affiliation(s)
| | | | | | | | - Nusrat Rashid
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
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Bhat SA, Rather MA, Pandit SA, Ingole PP, Bhat MA. Sensitive electrochemical sensing of acetaminophen and hydroquinone over single-pot synthesized stabilizer free Ag/Ag-oxide-graphene nanocomposites. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2016.11.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Pandit SA, Rather MA, Bhat SA, Rather GM, Bhat MA. Influence of the Anion on the Equilibrium and Transport Properties of 1-Butyl-3-methylimidazolium Based Room Temperature Ionic Liquids. J SOLUTION CHEM 2016. [DOI: 10.1007/s10953-016-0514-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Bhat SA, Singh H, Singh NK, Rath SS. Molecular detection of Babesia bigemina infection in apparently healthy cattle of central plain zone of Punjab. J Parasit Dis 2015; 39:649-53. [PMID: 26688628 DOI: 10.1007/s12639-014-0417-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Accepted: 01/08/2014] [Indexed: 11/26/2022] Open
Abstract
Bovine babesiosis is an important tick-borne disease caused by the parasites belonging to the genus Babesia, distributed worldwide and infecting a wide range of domesticated and wild cattle, occasionally man. The present study was conducted to determine the prevalence of B. bigemina infection in apparently healthy cattle from central plain zone of Punjab, India. Examination of Giemsa-stained peripheral thin blood smears revealed 2.45 % (5/204) animals to be positive for piroplasms of B. bigemina. However, genomic DNA isolated from these blood samples when subjected to primary PCR revealed a positivity of 7.35 % (15/204) as detected by the amplification of a 278-bp product in the agarose gel. PCR products obtained from the primary PCR of B. bigemina, when employed as template in nested PCR produced the amplicons of desired size (170 bp) was detected in 30.39 % (62/204) of the samples. It can thus be concluded that B. bigemina infection is prevalent in apparently healthy cattle population of this region and PCR assays can serve as a valuable tool for epidemiological studies in endemic areas.
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Affiliation(s)
- S A Bhat
- Department of Veterinary Parasitology, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, 141 004 Punjab India
| | - Harkirat Singh
- Department of Veterinary Parasitology, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, 141 004 Punjab India
| | - N K Singh
- Department of Veterinary Parasitology, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, 141 004 Punjab India
| | - S S Rath
- Department of Veterinary Parasitology, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, 141 004 Punjab India
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Wani AL, Bhat SA, Ara A. Omega-3 fatty acids and the treatment of depression: a review of scientific evidence. Integr Med Res 2015; 4:132-141. [PMID: 28664119 PMCID: PMC5481805 DOI: 10.1016/j.imr.2015.07.003] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2015] [Revised: 06/27/2015] [Accepted: 07/07/2015] [Indexed: 12/13/2022] Open
Abstract
Depression is a condition in which an individual feels lethargic, irritable, and guilty, has difficulty and trouble, no enjoyment in life, mood swings, sometimes suicidal ideation and thoughts, and loss of pleasure in activities. There are hundreds of millions of individuals suffering from major depression disorder all over the world. This leads to a considerable portion of the economy going for treatment as large amounts of money are spent on drugs every year. Pharmaceutical drugs are not very effective and they also have side effects that compound the problem. There are number of studies which shows that omega-3 fatty acids are proving to be very effective against the treatment of major depression disorder and other psychiatric disorders. However, the data regarding the efficacy of omega-3 fatty acids in depression treatment are conflicted. This article reviews the recent research showing the relation between omega-3 fatty acids and depression. The roles of the omega-3 fatty acids in the treatment of depression are being studied with increased pace in the last decade due to heightened prevalence of depression. It is emphasized that omega-3 fatty acids have no record of associated side effects, which deserves greater attention for further research.
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Affiliation(s)
| | | | - Anjum Ara
- Section of Genetics, Department of Zoology, Faculty of Life Science, Aligarh Muslim University, Uttar Pradesh, India
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Bhat SA, Rather MA, Pandit SA, Ingole PP, Bhat MA. Oxides in silver–graphene nanocomposites: electrochemical signatures and electrocatalytic implications. Analyst 2015; 140:5601-8. [DOI: 10.1039/c5an00740b] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Electrochemical investigations establish that the electroreduction of oxide form of silver present in Ag-reduced graphene oxide nanoassembly enhances its efficiency towards electro-oxidation of ascorbic acid (AA).
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Affiliation(s)
- Sajad Ahmad Bhat
- Department of Chemistry
- University of Kashmir
- Srinagar-190006
- India
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Rather MA, Rather GM, Pandit SA, Bhat SA, Bhat MA. Determination of cmc of imidazolium based surface active ionic liquids through probe-less UV-vis spectrophotometry. Talanta 2014; 131:55-8. [PMID: 25281072 DOI: 10.1016/j.talanta.2014.07.046] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Revised: 07/15/2014] [Accepted: 07/18/2014] [Indexed: 10/25/2022]
Abstract
In the first of its kind we herein report the results of our studies undertaken on the micellization behaviour of imidazolium based surface active ionic liquids (SAILs) to prove that their critical micelle concentration (cmc) can be estimated through ultraviolet-visible (UV-vis) spectroscopy without using any external probe. Tensiometric and spectrophotometric investigations of a series of freshly prepared SAILs viz. 1-octyl-3-methylimidazolium chloride ([OMIM][Cl]), 1-octyl-3-methylimidazolium dodecylsulphate ([OMIM][DS]), 1-octyl-3-methylimidazolium benzoate ([OMIM][Bz]), 1-octyl-3-methylimidazolium salicylate ([OMIM][Sc]), 1-octyl-3-methylimidazolium acetate ([OMIM][Ac]) are presented as a case study in support of the said claim. The cmcs estimated through spectrophotometric method were found to be close to the values estimated through tensiometry for the said SAILs. The cmcs for the investigated SAILS were found to vary in order of [OMIM][Cl]>[OMIM][Ac]>[OMIM][Bz]>[OMIM][Sc]>[OMIM][DS]. To the best of our knowledge the present communication will be the first report about the synthesis, characterization and micellization behaviour of [OMIM][Bz] and [OMIM][Sc].
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Affiliation(s)
| | | | | | - Sajad Ahmad Bhat
- Department of Chemistry, University of Kashmir, Srinagar-190006, J&K, India
| | - Mohsin Ahmad Bhat
- Department of Chemistry, University of Kashmir, Srinagar-190006, J&K, India.
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Bhat SA, Juyal PD, Singh NK, Singla LD. Coprological investigation on neonatal bovine cryptosporidiosis in Ludhiana, Punjab. J Parasit Dis 2014; 37:114-7. [PMID: 24431551 DOI: 10.1007/s12639-012-0143-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Accepted: 06/28/2012] [Indexed: 11/28/2022] Open
Abstract
An overall prevalence of 38.90 % was recorded for bovine cryptosporidiosis on coprological examination of 144 faecal samples collected from neonatal cattle calves from organised dairy farms in and around Ludhiana, Punjab by modified Ziehl-Neelsen staining. Further, a gradual decline in the percent prevalence was seen with increase in the age of the host from <1 month (64.1 %) to 4-5 months (12.5 %). The highest prevalence was recorded during the monsoon season (47.06 %) followed by summer (37.73 %) and winter (30.0 %) season and the seasonal variation was statistically significant (p ≤ 0.05). Female calves showed higher prevalence (44.32 %) than their male counterparts (27.66 %). Further, prevalence of cryptosporidiosis was significantly higher (p ≤ 0.05) in the diarrhoeic calves (52.70 %) as compared to the non-diarrhoeic (24.28 %) thus indicating a relatively higher risk (1.75 times) of the disease in diarrhoeic than normal calves.
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Affiliation(s)
- S A Bhat
- Department of Veterinary Parasitology, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, 141004 Punjab India
| | - P D Juyal
- Department of Veterinary Parasitology, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, 141004 Punjab India
| | - N K Singh
- Department of Veterinary Parasitology, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, 141004 Punjab India
| | - L D Singla
- Department of Veterinary Parasitology, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, 141004 Punjab India
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Bhat SA, Dixit M, Juyal PD, Singh NK. Comparison of nested PCR and microscopy for the detection of cryptosporidiosis in bovine calves. J Parasit Dis 2012; 38:101-5. [PMID: 24505186 DOI: 10.1007/s12639-012-0201-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2012] [Accepted: 10/26/2012] [Indexed: 10/27/2022] Open
Abstract
The comparative efficacies of different conventional parasitological methods and nested PCR for diagnosis of bovine cryptosporidiosis in faecal samples were evaluated. Among the 100 samples collected from calves in and around Ludhiana Direct faecal smear staining technique revealed 25.0 % positivity for the oocysts of Cryptosporidium spp. with sensitivity and specificity of 68.12 and 92.98 %, respectively. Zinc sulphate solution floatation and saturated sugar solution floatation staining techniques showed sensitivity and specificity of 83.92 and 96.36; 81.03 and 98.14 %, respectively. Products of the primary PCR of Cryptosporidium spp. directed against small subunit (18S) ribosomal RNA when employed as template in nested PCR produced the amplicons of desired size (834 bp) in 47.0 % of the samples. Amplification of 834 bp fragment was also observed in positive control, while no amplification was observed in negative control. Results indicated PCR assays as highly sensitive and specific techniques for the screening of the samples for Cryptosporidium spp. but in developing countries and under field conditions where limited resources do not allow the application of PCR assays, concentration staining methods are recommended.
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Affiliation(s)
- S A Bhat
- Department of Veterinary Parasitology, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, 141004 Punjab India
| | - M Dixit
- Department of Veterinary Parasitology, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, 141004 Punjab India
| | - P D Juyal
- Department of Veterinary Parasitology, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, 141004 Punjab India
| | - N K Singh
- Department of Veterinary Parasitology, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, 141004 Punjab India
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Bhat SA, Czuczman MS. Novel antibodies in the treatment of non-Hodgkin's lymphoma. Neth J Med 2009; 67:311-321. [PMID: 19767657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Monoclonal antibodies (mAbs) have revolutionised the treatment of malignancies, especially non-Hodgkin's lymphoma (NHL). Antibody-based therapies target tumour cells expressing a specific antigen while sparing the majority of normal cells leading to a decrease in treatment-associated toxicity. Rituximab, a monoclonal antibody directed against CD20 on B cells, was the first monoclonal antibody to be approved by the US Food and Drug Association (FDA) in 1997 for the treatment of patients with relapsed/refractory, follicular or low-grade NHL . However, it was soon realised that not all patients respond to rituximab therapy and close to 60% of patients with follicular lymphoma who were previously sensitive to rituximab become 'resistant' to repeat rituximab therapy. This led to further attempts to improve the antitumour activity of anti-CD20 mAbs (i.e. 2nd/3rd generation anti-CD20s), and to identify additional potential targets on lymphoma cells other than CD20. A number of these antibodies directed against lymphoma cell targets other than CD20 are now undergoing development, many of which are currently in clinical trials. This manuscript focuses on an overview of these 'non-anti-CD20' novel mAbs for NHL.
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MESH Headings
- Antibodies, Monoclonal/therapeutic use
- Antibodies, Monoclonal, Humanized
- Antibodies, Monoclonal, Murine-Derived
- Antigens, CD/immunology
- Antigens, Neoplasm/immunology
- Antineoplastic Agents/therapeutic use
- CD2 Antigens/immunology
- CD40 Antigens/immunology
- CD52 Antigen
- Drug Resistance, Neoplasm
- Glycoproteins/immunology
- Humans
- Immunologic Factors/therapeutic use
- Ki-1 Antigen/immunology
- Lymphoma, Non-Hodgkin/drug therapy
- Lymphoma, Non-Hodgkin/immunology
- Rituximab
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Affiliation(s)
- S A Bhat
- Department of Medicine, Roswell Park Cancer Institute, Buffalo, NY, USA
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Choh NA, Choh SA, Naikoo B, Bhat SA, Jehangir M. Circumferential aortic dissection. Case Reports 2009; 2009:bcr2008139758. [DOI: 10.1136/bcr.2008.139758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Affiliation(s)
- N A Choh
- Department of Pediatrics, SKIMS, Soura, Srinagar, India.
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