Publications by authors named "Vikas Kumar Roy"

Antimicrobial peptides (AMPs) are gaining popularity as potential substitutes for conventional antibiotics and bio-preservatives in response to an increase in antimicrobial resistance cases. However, their poor pharmacokinetic profiles limit their applicability. This study using ADMETlab, OECD QSAR toolbox, and VEGA HUB virtual environments profiled 82 peptide sequences of seven bee antimicrobial peptides (BAMPs: abaecin, apamin, apisimin, apidaecin, defensin, hymenoptaecin, and melittin) using 81 descriptors combining physicochemical, medicinal chemistry, ADMET, and toxicophore criteria.

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  • Visfatin is expressed in the testis across various species, but its specific role in the adult testis was previously unclear and this study aims to clarify it.
  • The injection of FK866, which inhibits visfatin, led to noticeable testicular degeneration and reduced testosterone levels after 24 hours, but parameters normalized after one week.
  • Overall, the study concludes that visfatin plays a crucial role in stimulating testosterone production and testicular growth, and that lingering effects after inhibition may result from compensatory mechanisms in response to the initial decline.
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The present study investigated the possible effects of copper nanoparticles (CuNPs) after discontinuing treatment on testicular activity in a mouse model. The male mice were given continuous CuNPs treatment for 70 days and left untreated for 70 days. The results show that even after the discontinuation of CuNPs treatment, the testicular impairment was persistent till 140 days at a higher dose (200 mg/kg group).

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  • Heat stress negatively affects testicular function and sperm production, but ellagic acid, a natural compound, may help improve this dysfunction.
  • In an experiment with mice, those subjected to heat stress and treated with ellagic acid showed increased testosterone levels, better testicular structure, and improved sperm quality at a higher dosage (50 mg/kg).
  • The study suggests that ellagic acid helps counteract heat-induced testicular damage by enhancing hormone production and germ cell growth while reducing oxidative stress, although further research is needed to explore the differing effects of the two dosages used.
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Hyperandrogenemia is associated with polycystic ovarian syndrome (PCOS) and imbalances in the pituitary hormones, luteinizing hormone (LH) and follicle-stimulating hormone (FSH) levels. Apelin and its receptor, APJ (class A, rhodopsin-like G- protein-coupled receptor), belongs to adipokines, and its expression has been shown in the pituitary. It is also well known that, hyperandrogenism and PCOS have deregulation of different adipokines.

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  • Apelin and its receptor APJ play a crucial role in regulating female reproductive functions, particularly in the uterus during the estrous cycle.
  • This study investigated how ovarian steroids influence apelin/APJ expression in the uterus and how gonadotropins affect these proteins in the ovary, using ovariectomized and immature mice for experimentation.
  • Results showed that uterine apelin/APJ expression varies across estrous stages, is increased by estrogen, decreased by progesterone, and that gonadotropins modulate apelin/APJ levels in the ovaries through hormonal signaling.
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Di-(2-ethylhexyl) phthalic acid (DEHP) pollutes the environment, and posing a significant risk to human and animal health. Consequently, a successful preventative strategy against DEHP-induced liver toxicity needs to be investigated. Morin hydrate (MH), a flavanol compound, possesses toxic preventive attributes against various environmental pollutants.

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Aims: Polycystic ovarian syndrome (PCOS) is one of the most common (about 5-20%) reproductive disorders in women of reproductive age; it is characterized by polycystic ovaries, hyperandrogenism, and oligo/ anovulation. The levels and expression of ovarian adipokines are deregulated in the PCOS. Apelin is an adipokine that acts through its receptor (APJ) and is known to express in the various tissues including the ovary.

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Adipokines are now well-known to regulate reproduction. Visfatin is an adipokine expressed in the hypothalamus, pituitary, ovary, uterus, and placenta of different species, and since it has been found to modulate the endocrine secretion of the hypothalamus, pituitary gland and ovary, it may be considered a novel regulator of female reproduction. Although the majority of the literature explored its role in ovarian regulation, visfatin has also been shown to regulate uterine remodeling, endometrial receptivity and embryo development, and its expression in the uterus is steroid dependent.

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Apelin and its receptor (APJ) are expressed in the reproductive organs of some mammalian females. The function of oviduct has also been suggested to be compromised in the hyperandrogenism condition. However, expression of apelin and APJ has not been shown in the oviduct of hyperandrogenized mice.

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The adipokines, visfatin, chemerin, and its receptor are expressed in the testis. It has also been shown that heat-stress alters the secretion and expression of other adipokines. Testicular heat-stress is now well known to cause the impairment in the testis.

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Idiopathic pulmonary fibrosis is a progressive and incurable lung disease characterized by collagen deposition, alveolar inflammation, fibroblast proliferation, and the destruction of lung tissue structures. It is a rare yet severe condition with a high mortality rate, typically leading to death within 3-5 years of diagnosis. The clinical presentation of idiopathic pulmonary fibrosis (IPF) involves a gradual and substantial loss of lung function, ultimately resulting in respiratory failure.

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Background: It is now well known that visfatin is expressed in the testis and ovary of various animals. Visfatin is known to regulate gonadal functions such as steroidogenesis, proliferation, and apoptosis in the ovary and testis of mice. Recently, we have shown that visfatin has an inhibitory role in the infantile mice testis.

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The expression of adipokines is well-known in the ovary and uterus. Recently we have shown that apelin and its receptor, APJ are developmentally regulated in the ovary and uterus of mice with elevation at postnatal day 14 (PND14). However, its role in the ovary and uterus of PND14 has not been investigated.

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Background: Heat stress is known to adversely affect testicular activity and manifest the pathogenesis of spermatogenesis. Morin hydrate is a plant-derived compound, which contains a wide range of biological activities. Thus, it is hypothesized that morin hydrate might have an ameliorative effect on heat-induced testicular impairment.

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Introduction: Apelin is an endogenous peptide, whose expression has been shown in the hypothalamus, pituitary, and ovary; furthermore, it is also called a neuropeptide, binding to apelin receptor (APJ) for various functions. It has been suggested that the hypothalamus, pituitary, and ovarian (HPO) axis is tightly regulated and factors and functions of the HPO axis can be modulated during the estrous cycle to influence reproductive status. To the best of our knowledge, the status of apelin and its receptor, APJ has not been investigated in the HPO axis during the estrous cycle.

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Copper nanoparticles (CuNPs) have been widely utilized in various applications. Due to its wider application, humans are at risk of its exposure. It has been reported that the exposure of CuNPs can lead to organ accumulation and affect organ toxicity.

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The expression of apelin and its receptor (APJ) has been shown in the hypothalamus-pituitary-testicular axis. It has also been suggested apelin and APJ are neuropeptide factors. The presence of apelin and APJ in the seminiferous tubules and interstitium might be predicted to act as a local regulator of testicular activity, although the function is not well known in the mice testis.

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Dietary phytoestrogens are the main source of environmental contamination due to their estrogen-mimicking and endocrine-disrupting effects, posing a threat to microbial, soil, plant, and animal health. Diosgenin, a phytosteroid saponin, is used in many traditional medicines, nutraceuticals, dietary supplements, contraceptives, and hormone replacement therapies against numerous diseases and disorders. It is important to be aware of the potential risks associated with diosgenin, as well as its potential to cause reproductive and endocrine toxicity.

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Adipokines have emerged as regulators of gonadal function in many mammalian and non-mammalian species. In the present study, we have investigated the developmental expression of testicular and ovarian visfatin along with its possible role in the testicular activity infantile stages. Previously, our group has the extensive role of ovarian visfatin in relation to steroidogenesis, proliferation, and apoptosis in female mice.

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The COVID-19 pandemic has caused adverse health (severe respiratory, enteric and systemic infections) and environmental impacts that have threatened public health and the economy worldwide. Drug repurposing and small molecule multi-target directed herbal medicine therapeutic approaches are the most appropriate exploration strategies for SARS-CoV-2 drug discovery. This study identified potential multi-target-directed bioactive entities against SARS-CoV-2 receptors (S-protein, ACE2, TMPRSS2, RBD/ACE2, RdRp, MPro, and PLPro) using ADMET, drug-likeness, molecular docking (AutoDock, FireDock and HDOCK), molecular dynamics simulation and MM-PBSA tools.

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There is a dearth of experimental evidence available as to whether the consumption of fermented pork fat (FPF) food has any harmful effects on metabolism and reproduction due to its excessive calories, high fat content, and fatty acid methyl ester (FAME) levels. We hypothesized that exposure to a FPF-diet with excessive calories, a high fat content, and high FAME levels alters testicular physiology and metabolism, leading to permanent damage to the testicular system and its function. Thirteen-week-old male rats (n = 20) were assigned to a high-calorie, high-fat diet (FPF-H, fat-60%, 23 kJ/g), a moderate-calorie, moderate-fat diet (FPF-M, fat-30%, 17.

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Alzheimer's disease (AD) is one of the neurodegenerative diseases, manifesting dementia, spatial disorientation, language, cognitive, and functional impairment, mainly affects the elderly population with a growing concern about the financial burden on society. Repurposing can improve the traditional progress of drug design applications and could speed up the identification of innovative remedies for AD. The pursuit of potent anti-BACE-1 drugs for AD treatment has become a pot boiler topic in the recent past and to instigate the design of novel improved inhibitors from the bee products.

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Although copper is an indispensable trace metal for biological functions, its excess exposure causes hazardous effects on health. Copper in the form of nanoparticles (CuNPs) is widely used at present and therefore, the living organism is at continuous risk of its adverse effect. The prolonged treatment of CuNPs has not been evaluated yet on the male reproductive system.

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Insulin plays important role in testicular functions such as germ cell proliferation and steroidogenesis, despite its conventional role as a hypoglycaemic agent. It is also well known that testicular activity is severely get affected by heat stress and heat stress induces testicular pathogenesis. The effect of insulin on heat-induced testicular impairment has not been investigated.

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