Department Of Biochemistry And Microbial Sciences
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Item miR-590�5p: A double-edged sword in the oncogenesis process(Elsevier Ltd, 2022-06-12T00:00:00) Barwal, Tushar Singh; Singh, Neha; Sharma, Uttam; Bazala, Sonali; Rani, Medha; Behera, Alisha; Kumawat, Ram Kumar; Kumar, Pawan; Uttam, Vivek; Khandelwal, Akanksha; Barwal, Jyoti; Jain, Manju; Jain, AklankAccumulating evidence suggests the critical role of miR-590�5p in various aspects of cellular homeostasis, including cancer. Furthermore, we and others have recently demonstrated that miRNA-590�5p acts as an oncogene in some cancers while it acts as a tumor-suppressor in others. However, the role of miR-590�5p in oncogenesis is more complex, like a double-edged sword. Thus, this systematic review introduces the concept, mechanism, and biological function of miR-590�5p to resolve this apparent paradox. We have also described the involvement of miR-590�5p in crucial cancer-hallmarks processes like proliferation, invasion, metastasis, and chemo radioresistance. Finally, we have presented the possible genes/pathways targets of miR-590�5p through bioinformatics analysis. This review may help in designing better biomarkers and therapeutic targets for cancers. � 2022Item Transposons: Unexpected players in cancer(Elsevier B.V., 2021-09-27T00:00:00) Pradhan, Rajesh Kumar; Ramakrishna, WusirikaTransposons are repetitive DNA sequences encompassing about half of the human genome. They play a vital role in genome stability maintenance and contribute to genomic diversity and evolution. Their activity is regulated by various mechanisms considering the deleterious effects of these mobile elements. Various genetic risk factors and environmental stress conditions affect the regulatory pathways causing alteration of transposon expression. Our knowledge of the biological role of transposons is limited especially in various types of cancers. Retrotransposons of different types (LTR-retrotransposons, LINEs and SINEs) regulate a plethora of genes that have a role in cell reprogramming, tumor suppression, cell cycle, apoptosis, cell adhesion and migration, and DNA repair. The regulatory mechanisms of transposons, their deregulation and different mechanisms underlying transposon-mediated carcinogenesis in humans focusing on the three most prevalent types, lung, breast and colorectal cancers, were reviewed. The modes of regulation employed include alternative splicing, deletion, insertion, duplication in genes and promoters resulting in upregulation, downregulation or silencing of genes. � 2021 Elsevier B.V.Item miRNAs as Therapeutic Target in Obesity and Cancer(Springer Singapore, 2021-07-18T00:00:00) Prajapati, Kumari Sunita; Shuaib, Mohd; Kushwaha, Prem Prakash; Singh, Atul Kumar; Sharma, Rahul; Kumar, ShashankMicroRNAs are small non-coding RNAs that regulate the expression of many genes. Alteration of microRNA expressions is associated with the occurrence of diseases including cancer, obesity, and obesity-related cancer. miRNAs are also known to regulate different cancer-related gene expressions indicating microRNAs could function as tumor suppressors and oncogenes. Obesity and cancer are the two critical diseases affecting millions of people all over the world. Obesity has been associated with incidence and a major risk factor for the occurrence of diseases like diabetes, cardiovascular disease, and various cancers. Synthesis of miRNAs-based therapeutics like miRNA mimics, anti-miR oligonucleotides is going on to cure obesity, cancer, and obesity-associated cancer. miRNAs emerged as a potential biomarker and being considered as a diagnostic, prognostic, and therapeutic target for the treatment of obesity, cancer, and obesity-associated cancer. � The Editor(s) (if applicable) and The Author(s), under exclusive license to Taylor and Francis Pte Ltd. 2021.Item Obesity and Cancer(Springer Singapore, 2021-07-18T00:00:00) Kumar, Shashank; Gupta, SanjayThis book highlights the concordance between signaling pathways that are involved in obesity and cancer cross-talks. It describes the role of cytokines, chemokines, growth factors, insulin, and adipokines in the development of obesity-associated cancers. The book reviews the role of inflammatory signaling pathways such as estrogen-mediated signaling, mTOR and AMP-activated protein kinase pathway and the involvement of adaptive and innate immunity, oxidative stress, gene polymorphism, dietary phytochemicals, and miRNAs in obesity and cancer. In addition, it covers the latest research on the drugs and natural therapeutic agents that target obesity-induced cancers and discusses various in vivo models for studying obesity and obesity-associated cancer. Lastly, it analyses the role of genetic polymorphisms in the obesity-related genes that influence cancer development. The book is a useful resource for researchers in the field of cancer, pharmacology, food chemistry, and clinical biochemistry. � The Editor(s) (if applicable) and The Author(s), under exclusive license to Taylor and Francis Pte Ltd. 2021.Item Characterization of phytochemicals and validation of antioxidant and anticancer activity in some Indian polyherbal ayurvedic products(Springer, 2021-03-13T00:00:00) Kushwaha, Prem Prakash; Kumar, Ramesh; Neog, Panchi Rani; Behara, Malay Ranjan; Singh, Pratibha; Kumar, Ajay; Prajapati, Kumari Sunita; Singh, Atul Kumar; Shuaib, Mohd; Sharma, Amit Kumar; Pandey, Abhay Kumar; Kumar, ShashankIn the present comparative study, the authors studied the antioxidant and anticancer activity of commercially available polyherbal Indian Ayurvedic products namely Divya Sarvakalp Kwath (DSKK), Divya Sanjivani Vati (DSV), Kanchanar Guggulu (KG) and Shakti Drop (SD). Authors also quantified phenolic and flavonoid contents in the samples. Solid powdered samples (DSKK, DSV, and KG) were extracted in methanol and water (1:1) using cold extraction method. Spectrophotometry technique was used to quantify the phytochemicals present in test samples. DSKK showed comparatively higher content of total phenolics (247.65 � 0.05 ?gPGE/g) and flavonoid (34.66 � 0.19 �gQE/mg). Radical scavenging, metal ion chelation and reducing potential of test products were studied using nitric oxide scavenging, DPPH, metal ion chelation, reducing power ability, and phosphomolybdate in vitro antioxidant assays at different concentration. Dose-dependent antioxidant activity was observed in all the test samples at 100�500��g or �l/ml concentration. Anticancer efficacy of the test samples were studied in lung (A549), colon (Colo205), and breast cancer (MCF7) cell lines at different concentrations (10�100��g or �l/ml) using MTT assay. Confocal microscopy was used to reveal the apoptotic induction, mitochondrial membrane integrity disruption and reactive oxygen species production ability of test products in cancer cells. The present study revealed that DSKK possesses comparatively better antioxidant potential and SD has potent anticancer activity against breast cancer cells. � 2021, Society for Plant Research.Item Emerging role of ZBTB7A as an oncogenic driver and transcriptional repressor(Elsevier, 2020) Gupta, S; Singh, A.K; Prajapati, K.S; Kushwaha, P.P; Shuaib, M; Kumar, S.ZBTB7A is a member of the POK family of transcription factors that possesses a POZ-domain at the N-terminus and Krüppel-like zinc-finger at the c-terminus. ZBTB7A was initially isolated as a protein that binds to the inducer of the short transcript of HIV-1 virus TAT gene promoter. The protein forms a homodimer through protein-protein interaction via the N-terminus POZ-domains. ZBTB7A typically binds to the DNA elements through its zinc-finger domains and represses transcription both by modification of the chromatin organization and through the direct recruitment of transcription factors to gene regulatory regions. ZBTB7A is involved in several fundamental biological processes including cell proliferation, differentiation, and development. It also participates in hematopoiesis, adipogenesis, chondrogenesis, cellular metabolism and alternative splicing of BCLXL, DNA repair, development of oligodendrocytes, osteoclast and unfolded protein response. Aberrant ZBTB7A expression promotes oncogenic transformation and tumor progression, but also maintains a tumor suppressive role depending on the type and genetic context of cancer. In this comprehensive review we provide information about the structure, function, targets, and regulators of ZBTB7A and its role as an oncogenic driver and transcriptional repressor in various human diseases. - 2020 Elsevier B.V.Item Dihydropyrimidine dehydrogenase in the metabolism of the anticancer drugs(Springer Verlag, 2019) Sharma V.; Gupta S.K.; Verma M.Cancer caused by fundamental defects in cell cycle regulation leads to uncontrolled growth of cells. In spite of the treatment with chemotherapeutic agents of varying nature, multiple resistance mechanisms are identified in cancer cells. Similarly, numerous variations, which decrease the metabolism of chemotherapeutics agents and thereby increasing the toxicity of anticancer drugs have been identified. 5-Fluorouracil (5-FU) is an anticancer drug widely used to treat many cancers in the human body. Its broad targeting range is based upon its capacity to act as a uracil analogue, thereby disrupting RNA and DNA synthesis. Dihydropyrimidine dehydrogenase (DPD) is an enzyme majorly involved in the metabolism of pyrimidines in the human body and has the same metabolising effect on 5-FU, a pyrimidine analogue. Multiple mutations in the DPD gene have been linked to 5-FU toxicity and inadequate dosages. DPD inhibitors have also been used to inhibit excessive degradation of 5-FU for meeting appropriate dosage requirements. This article focusses on the role of dihydropyrimidine dehydrogenase in the metabolism of the anticancer drug 5-FU and other associated drugs.Item Natural Compounds Are Smart Players in Context to Anticancer Potential of Receptor Tyrosine Kinases: An In Silico and In Vitro Advancement(Springer, 2017) Singh, Pushpendra; Kumar, Shashank; Bast, FelixCancer is the ruling cause of mortality worldwide. Chemotherapeutic toxicity and drug resistance have provided impulsion for the formulation of new anticancer agents. Receptor tyrosine kinases (RTKs) are the most activated cell surface receptors for copious polypeptide growth factors, cytokines, and hormones that play a considerable role in cancer initiation, promotion, and progression. Natural products are a prime source of new anticancer drugs and their leads. The objective of computer-aided drug design (CADD) is to enhance the set of compounds with prudent active drug-like properties and eliminate inactive, toxic, poor absorption, distribution, metabolism, and excretion toxicity (ADME/T) compounds. In the present chapter, in silico advancement of anticancer natural compounds and molecular mechanisms of action of flavonoids, viz., genistein, myricetin, quercetin, luteolin, morin, kaempferol, catechin, and epigallocatechin gallate (EGCG), on RTK and PI3K signaling pathway attributing to their potential anticancer activity have been discussed.