Publications by authors named "Hari Om Singh"

Lymphatic filariasis (LF) continues to impact 657 million individuals worldwide, resulting in lifelong and chronic impairment. The prevalent anti-filarial medications-DEC, albendazole, and ivermectin-exhibit limited adulticidal efficacy. Despite ongoing LF eradication programs, novel therapeutic strategies are essential for effective control.

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Background: SARS-CoV-2 infection can result in long-term chronic cardiovascular (CV) damage after the acute phase of the illness. COVID-19 frequently causes active myocarditis, SARS-CoV-2 can directly infect and kill cardiac cells, causing severe pathology and dysfunction across the organs and cells. Till now, the pathogenesis of COVID-19-associated cardiac injuries has not been understood, but there are several factors that contribute to the progression of cardiac injuries, such as genetic, dietary, and environmental.

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  • - The study examined the impact of ApoE gene polymorphisms on HIV-related lipodystrophy (HIVLD) and metabolic abnormalities in 200 HIV-infected patients, revealing that certain genotypes might influence the risk of developing these conditions.
  • - Results indicated that ApoE alleles 2 and specific genotypes, like 4/4, were connected to a decreased risk of HIV-1 infection and a lower likelihood of severe HIVLD, whereas allele 2 was linked to increased risk of both HIV acquisition and HIVLD severity.
  • - Additionally, the study found correlations between specific ApoE genotypes and impaired cholesterol and glucose levels in patients without HIVLD, highlighting the intricate relationship between genetics and metabolic health in the context
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  • Apolipoproteins and SCARB1 proteins play a role in HIV-associated lipodystrophy (HIVLD), with specific genetic polymorphisms influencing risk factors for cardiovascular diseases.
  • The study examined 3238C/G, 12669G/A, and 1050C/T polymorphisms in 187 HIV patients and 139 healthy controls, finding specific genotypes linked to severe HIVLD and altered lipid levels.
  • Overall, while the polymorphisms did not directly modify HIVLD risk, they indicated increased susceptibility when combined with unfavorable lipid and glucose levels.
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Background: The ABCG2 421C/A polymorphism contributes significantly to the distribution and absorption of antiretroviral (ARV) regimens and is associated with the undesirable side effects of efavirenz.

Methods: To investigate this, we examined ABCG2 34G/A (rs2231137) and 421C/A (rs2231142) genetic variations in 149 HIV-infected patients (116 without hepatotoxicity, 33 with ARV-induced hepatotoxicity) and 151 healthy controls through the PCR-restriction fragment length polymorphism (PCR-RFLP) technique.

Results And Discussion: The ABCG2 34GA genotype and 34A allele indicated a risk for antiretroviral therapy-associated hepatotoxicity development (p = 0.

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  • Protease inhibitors (PIs) have been linked to lipodystrophy, a condition marked by loss of body fat in people living with HIV, with variations in this condition influenced by genetic factors and environmental elements.
  • A study sequenced lipid metabolism-related genes in 48 patients, revealing novel genetic variants in the ABCB6 and GRN genes that may be associated with the presence or absence of HIV-related lipodystrophy.
  • The findings indicate that specific genetic mutations could affect protein production, potentially worsening lipodystrophy symptoms, while other mutations may help understand the absence of this condition in certain individuals.
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  • HIV-associated lipodystrophy (HIVLD) is a condition related to abnormal lipid metabolism in HIV-infected individuals, influenced by specific gene polymorphisms affecting lipoprotein transport.
  • A study of 187 patients identified the 34A allele and -493T allele as having a non-significant association with reduced severity of HIVLD and lower dyslipidemia risk, respectively.
  • Findings suggest that individuals without HIVLD carrying the 34GA genotype have impaired triglyceride levels, indicating a potential increased risk for developing dyslipidemia.
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  • Cytokines, particularly pro-inflammatory ones like IL-1, TNF-α, and IL-6, influence lipid and glucose metabolism and are linked to disorders like lipodystrophy syndrome.
  • * Elevated levels of these cytokines correlate with obesity and type II diabetes, indicating a relationship between inflammatory responses and metabolic disturbances.
  • * The review highlights the genetic variations in cytokine and adipokine genes that may affect susceptibility to HIV-associated lipodystrophy (HIVLD), drawing upon data from various research databases.
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Apolipoprotein not only have a role in cholesterol metabolism but also play a role in normal brain function. Apolipoprotein gene polymorphisms are known risk factors for a number of mental and neurological disorders. The expression of brain apolipoproteins is significantly altered in several brain disorders.

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  • Adipocytes are essential for lipid and sugar metabolism, and their response can vary due to physiological stresses, particularly in people living with HIV (PLWH) on antiretroviral therapy (ART).
  • The effectiveness of HAART differs among patients, with genetic variations influencing their responses and contributing to conditions like HIV-associated lipodystrophy syndrome (HALS).
  • A study reviewed the role of specific genes related to drug metabolism and lipid transport, highlighting how genetic variations may lead to metabolic complications and differences in fat metabolism during ART.
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Most polyphenols can cross blood-brain barrier, therefore, they are widely utilized in the treatment of various neurodegenerative diseases (ND). Resveratrol, a natural polyphenol contained in blueberry, grapes, mulberry, etc., is well documented to exhibit potent neuroprotective activity against different ND by mitochondria modulation approach.

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Background: TLR3 polymorphisms affect the risk of HIV infection and modify the disease course. Consequently, we analyzed the association of TLR3 polymorphism (rs5743312, rs3775296, and rs3775291) with susceptilbity to HIV-1 acquisition and disease progression.

Method: This is a cross-sectional study.

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Many diseases including HIV-Associated Neurocognitive Disorder (HAND) are impacted by matrix metalloproteinases (MMPs). MMP-13 play a role to cleave the collagen. MMP-13 contributes to peripheral neuropathy and induces unmyelinated axon degeneration.

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The current study was conducted to exemplify the effect of debelalactone on tissue protection, chronic hepatic inflammation, hepatic protection and oxidative stress induced by diethyl nitrosamine in Wistar rats. Therefore, DEN (200 mg/kg) was used for the induction the hepatocellular carcinoma (HCC) and the level of serum alpha fetoprotein was used for the estimation and confirmation of HCC. The study illustrated that debelalactone (DL) significantly downregulated the hepatic, non-hepatic parameters such as aspartate aminotransferase, alanine aminotransferase, alpha fetoprotein, NO levels, total protein, albumin, blood urea nitrogen, total bilirubin, and direct bilirubin in dose dependent manner, as well as noticeably improving the body weight, of treated animals.

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AIDS restriction genes (ARGs) like APOBEC3, TRIM5α, and BST2 can act as immunological detectors of the innate protective mechanism of the body. ARGs influence the course of viral pathogenesis and progression of the disease. The infection caused by different viruses including HIV activates the innate immune receptors leading to production of proinflammatory cytokines, interferons and signals that recruit and activate cells involved in the process of inflammation following induction of adaptive immunity.

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Rapid infectivity of SARS-CoV2 with recent viral variants is posing a challenge in the development of robust therapeutic strategies. On the other hand, microbiota is debated for its involvement in SARS-CoV2 infection with varied opinions. Although ample data about the role of microbiota and probiotics in respiratory viral infections are available, their role in COVID-19 is limited albeit emerging rapidly.

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Kinase insert Domain containing Receptor (KDR)/Vascular Endothelial Growth Factor Receptor (VEGFR-2) participate in endothelial dysfunction, which can lead to chronic liver disease. KDR reflects naturally against the toxicants from the damaged liver cells. Association of KDR polymorphism has been reported with many diseases including liver disease, but its role has not been described in ARV induced hepatotoxicity.

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Background: Mannose-binding lectin 2 (MBL2) gene has a significant role in the essential protective mechanism of the body. Variations reported in the genetic makeup of this gene influence the circulating MBL levels that could lead to the vulnerability to various viral infections including HIV. Hence, we assessed the MBL2 coding region (52A/D, 54A/B, and 57A/C) variations in HIV-associated neurocognitive disorders (HAND).

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Background: Long period of SARS-CoV-2 infection has been associated with psychiatric and cognitive disorders in adolescents and children. SARS-CoV-2 remains dormant in the CNS leading to neurological complications. The wide expression of ACE2 in the brain raises concern for its involvement in SARS-CoV-2 infection.

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Evaluation a field-scale of constructed wetland (CW) for the treatment of rural wastewater (WW), in resource-scarce semi-arid tropic (SAT) villages, to provide improved wastewater management and increased water use efficiency, was the main objective of this study. A CW was commissioned in Kothapally village of Telangana to treat the wastewater generated from 100 households. The CW was vegetated with and Average COD, sulfate and inorganic nitrogen removal efficiencies observed were 65%, 60% and 67% respectively, for the study period (one year).

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Background: A carboxypeptidase protein called ACE2 is found in many organs. ACE2 protein can play a pivotal role to regulate the pathological changes of several diseases including COVID-19. TMPRSS2 gene is expressed in many human tissues and plays a critical role in spreading the infection of the viruses including coronavirus and progression of prostate cancer, and hence could be used as a potential drug target.

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Toll-like receptors (TLRs) play an important role in the innate immune response to HIV infection. Single nucleotide polymorphism (SNP) in (Gln11Leu) gene has been associated with a rapid decline of CD4T cell count. Hence, we assessed the (rs179008, Gln11Leu (A/T) and rs179009, IVS2-151 (A/G)) polymorphism in 150 HIV-infected individuals naïve to ART and 158 healthy controls.

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Background: Plasma concentrations of antiretrovirals (ARVs) regimens have considerably varied in individuals of human immunodeficiency virus (HIV) because of variations in the expression of drug-metabolizing and transporter genes. Transporter genes play an important role in the disposition of drugs. Polymorphism in transporter gene (ABCC3) affects the MRP3 expression and varies the treatment outcome.

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Background: Micro RNAs act as a regulatory layer for pharmacogenomics-related gene ex-pression. It could play a role in the efficacy and toxicity of the drug. The SNPs in miRNA genes are linked with different functional consequences.

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The imbalance between MMPs and TIMPs is associated with the HIV dissemination tissue damage pathology neurodegenerative disorders, including HAND. Genetic variations in the gene may modulate the neurocognitive disorder in HIV patients. Hence, we evaluated the genetic variants of -2 (418G/C, 303G/A) gene with the risk of HAND.

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