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Purpose The sequence variation of human immunodeficiency virus (HIV) capsid region may influence and alter the susceptibility to human tripartite motif 5α protein (huTRIM5α). Materials and methods Molecular docking was carried out with huTRIM5α SPRY domain by the use of ClusPro and Hex docking program for HIV-1 and HIV-2 capsid sequences. Results The sequence analysis on HIV-1 and HIV-2 capsid gag gene identified 35 (19.7%) single-nucleotide polymorphisms (SNPs) in HIV-1 and 8 (4.5%) SNPs in HIV-2. The variations observed in the HIV-2 capsid region were significantly lower than HIV-1 (P less then 0.001). The molecular docking analysis showed that HIV-1 wild type used V1 loop, while HIV-2 used V3 loop of huTRIM5α for interaction. HIV-1 with A116T SNP and HIV-2 with V81A SNP use V3 and V1 loop of huTRIM5α for interaction respectively. The reduced huTRIM5α inhibition may lead to a faster progression of disease among HIV-1-infected individuals. However, in case of HIV-2, increased inhibition by huTRIM5α slows down the disease progression. Conclusion Polymorphisms in the capsid protein with both HIV-1- and HIV-2-monoinfected individuals showed the difference in the docking energy from the wild type. This is the first study which documents the difference in the usage of loop between the two HIV types for interaction with huTRIM5α. Variations in the capsid protein result in alteration in the binding to the restriction factor huTRIM5α.Introduction Human rhinovirus (HRV) and Enterovirus (ENV) are the major causes of childhood acute respiratory tract infections (ARTIs). This study sought to understand the distribution pattern of HRV subgroups, their seasonality and association with respiratory complications in patients at a tertiary care hospital. Results Of the total 332 ARTI samples, 82 (24.7%) were positive for ENV/HRV. Twenty positive samples were processed further for phylogenetic analysis. Ten of the 20 samples were identified to be HRVs (70% HRV A and 30% HRV C) and nine were enteroviruses. HRV A clustered near three distinct HRV types (A12, A78 and A82). Four of the HRV strains (represented as SEQ 137 rhino, SEQ 282 rhino, SEQ 120 rhino and SEQ 82 rhino) had high sequence similarity. see more HRV C showed seasonality and was associated with disease severity. Conclusion The genotyping and phylogenetic analysis of the HRVs in the current study shows its circulatory pattern, association with risk factors and evolutionary dynamics.Purpose Hepatitis E virus (HEV) is an emerging pathogen causing acute viral hepatitis worldwide. Clinical manifestations often occur in young adults with an increased mortality rate among pregnant women. HEV genotypes 1 and 4 are mainly reported among humans and swines, respectively. Aims The aim was to study the currently circulating genotypes of HEV in India. Materials and methods A retrospective cross-sectional study was carried out at Manipal Institute of Virology to know the circulating genotypes of hepatitis E, spanning over 5 years from August 2014 to September 2018. The serum samples screened serologically positive and confirmed positive for active infection by real-time reverse transcriptase-polymerase chain reaction (PCR) (Real Star® HEV RT-PCR Kit 2.0, Altona Diagnostics, GmbH, Hamburg, Germany) were further subjected to nested conventional PCR targeting the RdRp gene of non-structural ORF1 region. The purified PCR product was sequenced in BigDye Terminator v3.1 Cycle Sequencing Kit (Life Technologies, Thermo Fisher Scientific, USA). The chromatograms obtained by sequencing were analysed using Sequencher 5.4.6, and HEV FASTA sequences were compared with reference sequences for HEV in GenBank Nucleotide Blast. Results During the study period, there were 317 cases of laboratory-confirmed cases of acute viral hepatitis comprising 202, 70, 43 and 2 cases of hepatitis A, E, B and C, respectively. Serum samples of 70 acute hepatitis cases were positive for anti-hepatitis E IgM. According to the clinical case classification, there were 66 cases of acute viral hepatitis and four cases of fulminant hepatic liver failure. The mean age of the patients was 30.3 years (standard deviation = 12.5). The samples from various parts of India were genotyped as 1a. Conclusion The HEV genotypes 1a was observed to be the currently circulating strain in the regions studied.Background and objectives Human papillomavirus (HPV) is the causative agent of cervical cancer, a major cause of cancer mortality in Indian women. The current study was undertaken to add information to the existing data on HPV type distribution in Indians, in an attempt to document HPV types for future vaccination programme, if any. Materials and methods HPV infection was screened in 223 cervical cancer cases and 2408 healthy women without cancer and cervical intraepithelial neoplasia (control). HPV was typed using polymerase chain reaction, Southern hybridisation using specific probes and HPV GenoArray (Hybribio) test. Results HPV DNA was found in 92.8% of cases and 7.3% of controls. Of the 383 HPV-infected women, 30.0% had single infection; 50.9% had multiple infections (two or more types) and 19.1% were infected with HPV types other than HPV-16, -18, -6 and -11. Besides HPV-16, HPV-51 and HPV-33 were also seen as single infection in cases. In cases, HPV-18 or its homologous HPV-45 was always present as co-infection with HPV-16 or with other high-risk type. Binary logistic regression (backward) analysis highlighted significant association of age, parity and socioeconomic status with HPV infection. The present study highlighted the presence of multiple HPV infection (186 of 207, 89.9%) along with HPV-16 in women with cervical cancer. In control, 27.3% were co-infected with other sexually transmitted infections, while Chlamydia trachomatis infection was seen in 13% of cases. Conclusions The study highlighted the type of HPV infection seen among the hospital-based population. For better screening, HPV tests available in the market should include all the types seen in the population.Introduction The pathogenicity of influenza virus infection is modulated by the cytokine expressions in patients. The present study was aimed to measure some important pro- and anti-inflammatory cytokines in influenza-infected population of Assam, Northeast India. Materials and methods Influenza viruses consisting of subtypes influenza A(H1N1)pdm09, H3N2 and influenza-B were detected in patients with symptoms of influenza-like-illness by Real-time reverse transcriptase polymerase chain reaction (RT-PCR) method. Relative messenger ribonucleic acid (mRNA) quantification of four pro-inflammatory cytokines (interleukin [IL]-6, IL-8, interferon-gamma [IFN-γ] and tumour necrosis factor-alpha [TNF-α]) and one anti-inflammatory cytokine (IL-10) were measured in influenza-positive cases and non-influenza controls, by real-time RT-PCR. The plasma concentration of the cytokines was determined using cytometric-bead-array with flow cytometry. Results Influenza viruses were detected in 14.28% (50/350) of 350 patients screened.
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