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  1. Article ; Online: Identifying the genetic associations among the psoriasis patients in eastern India.

    Das, Shantanab / Chandra, Aditi / Das, Anamika / Senapati, Swapan / Chatterjee, Gobinda / Chatterjee, Raghunath

    Journal of human genetics

    2024  Volume 69, Issue 5, Page(s) 205–213

    Abstract: Psoriasis is a multifactorial genetic disorder manifested by hyperproliferation and abnormal differentiation of epidermal keratinocytes, along with the infiltration of inflammatory cells into the skin. Although ~80 genetic susceptibility variants were ... ...

    Abstract Psoriasis is a multifactorial genetic disorder manifested by hyperproliferation and abnormal differentiation of epidermal keratinocytes, along with the infiltration of inflammatory cells into the skin. Although ~80 genetic susceptibility variants were reported in psoriasis, many loci showed population-specific associations, warranting the need for more population-specific association studies in psoriasis. We determined the association of forty single nucleotide polymorphisms (SNPs) among 2136 psoriasis patients and normal individuals from eastern India. We investigated the expression of corresponding genes and evaluated the protein structure stability for the genes with susceptible coding variants. We found fifteen SNPs significantly associated with psoriasis, while additional three SNPs showed significant association when we classified the patients based on the presence of HLA-Cw6 allele. Epistatic interaction between HLA-Cw6 and other associated loci showed significant association with the SNPs at PSORS1 region, along with other five SNPs outside PSORS1. Three genes showed significant differential expression in psoriatic tissues compared to the adjacent normal skin tissues but were not differential when classified the patients based on their genotypes. SNP rs495337 at SPATA2 (Spermatogenesis Associated 2) showed a 1.2-fold increased risk among the HLA-Cw6 patients compared to combined samples. We found significant downregulation of SPATA2 among the patients with risk genotypes and HLA-Cw6 allele compared to the non-risk genotypes. Protein structure stability analysis showed reduced structural stability for all the mutant residues caused by the associated coding variants. Our study evaluated the genetic associations of psoriasis-susceptible variants in India and evaluated the possible functional significance of these associated variants in psoriasis.
    MeSH term(s) Humans ; Psoriasis/genetics ; Polymorphism, Single Nucleotide ; India/epidemiology ; Genetic Predisposition to Disease ; Male ; Female ; HLA-C Antigens/genetics ; Adult ; Alleles ; Middle Aged ; Genotype ; Genetic Association Studies ; Case-Control Studies
    Chemical Substances HLA-C Antigens ; HLA-C*06 antigen
    Language English
    Publishing date 2024-02-27
    Publishing country England
    Document type Journal Article
    ZDB-ID 1425192-9
    ISSN 1435-232X ; 1434-5161
    ISSN (online) 1435-232X
    ISSN 1434-5161
    DOI 10.1038/s10038-024-01227-8
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Seroprevalence and Dynamics of anti-SARS-CoV-2 antibody among healthcare workers following ChAdOx1 nCoV-19 vaccination.

    Sarkar, Soma / Das, Shantanab / Choudhury, Kabita / Mukherjee, Saibal / Chatterjee, Raghunath

    Epidemiology and infection

    2022  , Page(s) 1–20

    Language English
    Publishing date 2022-04-25
    Publishing country England
    Document type Journal Article
    ZDB-ID 632982-2
    ISSN 1469-4409 ; 0950-2688
    ISSN (online) 1469-4409
    ISSN 0950-2688
    DOI 10.1017/S0950268822000747
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Functional Mapping of Genetic Interactions between HLA-Cw6 and LCE3A in Psoriasis.

    Chandra, Aditi / Das, Shantanab / Mazumder, Sayani / Senapati, Swapan / Chatterjee, Gobinda / Chatterjee, Raghunath

    The Journal of investigative dermatology

    2021  Volume 141, Issue 11, Page(s) 2630–2638.e7

    Abstract: Functional studies to delineate the molecular mechanisms of causal genetic variants are the main focus in the post-GWAS era. Previous GWASs have identified >50 susceptibility loci associated with psoriasis. Functional understanding of the biology ... ...

    Abstract Functional studies to delineate the molecular mechanisms of causal genetic variants are the main focus in the post-GWAS era. Previous GWASs have identified >50 susceptibility loci associated with psoriasis. Functional understanding of the biology underlying the disease risk of most of these associated loci is unclear. In this study, we identified a regulatory SNP at the putative enhancer of the LCE3A gene within the epidermal differentiation complex that showed epistatic interaction with HLA-Cw6. The variant allele disrupted signal transducer and activator of transcription 3 binding to the region, thereby regulating the expression of the downstream LCE3A gene. Electrophoretic mobility shift and pulldown assay confirmed the preferential binding of signal transducer and activator of transcription 3 to the DNA with a wild-type allele compared with the DNA with a variant allele. The reporter assay further validated the IL-6‒stimulated phosphorylated signal transducer and activator of transcription 3‒mediated LCE3A activation in the presence of the wild-type allele. Interestingly, the presence of the HLA-Cw6 allele leads to IL-6‒mediated phosphorylation of signal transducer and activator of transcription 3, followed by its nuclear localization in the epidermal keratinocytes of psoriatic skin, suggesting indirect interaction of the HLA-Cw6 allele and a regulatory SNP upstream of the LCE3A gene. This study reflects an interesting approach to dissecting the molecular mechanism underlying the genetic interaction observed between HLA-Cw6 and LCE3A in psoriasis pathogenesis.
    MeSH term(s) Cells, Cultured ; Cornified Envelope Proline-Rich Proteins/genetics ; Gene Expression Regulation ; HLA-C Antigens/genetics ; Humans ; Interleukin-1alpha/physiology ; Interleukin-6/physiology ; Phosphorylation ; Polymorphism, Single Nucleotide ; Psoriasis/etiology ; Psoriasis/genetics ; STAT3 Transcription Factor/metabolism
    Chemical Substances Cornified Envelope Proline-Rich Proteins ; HLA-C Antigens ; HLA-C*06 antigen ; Interleukin-1alpha ; Interleukin-6 ; LCE3A protein, human ; STAT3 Transcription Factor ; STAT3 protein, human
    Language English
    Publishing date 2021-05-21
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 80136-7
    ISSN 1523-1747 ; 0022-202X
    ISSN (online) 1523-1747
    ISSN 0022-202X
    DOI 10.1016/j.jid.2021.04.020
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Characterizations of SARS-CoV-2 mutational profile, spike protein stability and viral transmission

    Laha, Sayantan / Chakraborty, Joyeeta / Das, Shantanab / Manna, Soumen Kanti / Biswas, Sampa / Chatterjee, Raghunath

    Infection, genetics, and evolution. 2020 Nov., v. 85

    2020  

    Abstract: The recent pandemic of SARS-CoV-2 infection has affected more than 3.0 million people worldwide with more than 200 thousand reported deaths. The SARS-CoV-2 genome has the capability of gaining rapid mutations as the virus spreads. Whole-genome sequencing ...

    Abstract The recent pandemic of SARS-CoV-2 infection has affected more than 3.0 million people worldwide with more than 200 thousand reported deaths. The SARS-CoV-2 genome has the capability of gaining rapid mutations as the virus spreads. Whole-genome sequencing data offers a wide range of opportunities to study mutation dynamics. The advantage of an increasing amount of whole-genome sequence data of SARS-CoV-2 intrigued us to explore the mutation profile across the genome, to check the genome diversity, and to investigate the implications of those mutations in protein stability and viral transmission. We have identified frequently mutated residues by aligning ~660 SARS-CoV-2 genomes and validated in 10,000 datasets available in GISAID Nextstrain. We further evaluated the potential of these frequently mutated residues in protein structure stability of spike glycoprotein and their possible functional consequences in other proteins. Among the 11 genes, surface glycoprotein, nucleocapsid, ORF1ab, and ORF8 showed frequent mutations, while envelop, membrane, ORF6, ORF7a and ORF7b showed conservation in terms of amino acid substitutions. Combined analysis with the frequently mutated residues identified 20 viral variants, among which 12 specific combinations comprised more than 97% of the isolates considered for the analysis. Some of the mutations across different proteins showed co-occurrences, suggesting their structural and/or functional interaction among different SARS-COV-2 proteins, and their involvement in adaptability and viral transmission. Analysis of protein structure stability of surface glycoprotein mutants indicated the viability of specific variants and are more prone to be temporally and spatially distributed across the globe. A similar empirical analysis of other proteins indicated the existence of important functional implications of several variants. Identification of frequently mutated variants among COVID-19 patients might be useful for better clinical management, contact tracing, and containment of the disease.
    Keywords COVID-19 infection ; Severe acute respiratory syndrome coronavirus 2 ; amino acids ; data collection ; empirical research ; evolution ; glycoproteins ; infection ; nucleocapsid ; pandemic ; people ; protein structure ; viability ; virus transmission ; viruses
    Language English
    Dates of publication 2020-11
    Publishing place Elsevier B.V.
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 2037068-4
    ISSN 1567-1348
    ISSN 1567-1348
    DOI 10.1016/j.meegid.2020.104445
    Database NAL-Catalogue (AGRICOLA)

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  5. Article ; Online: Seroprevalence and Dynamics of anti-SARS-CoV-2 antibody among healthcare workers following ChAdOx1 nCoV-19 vaccination

    Sarkar, Soma / das, Shantanab / Choudhury, Kabita / Mukherjee, Saibal / Chatterjee, Raghunath

    medRxiv

    Abstract: Abstract Background The serological evaluations of IgG, IgM, and IgA to the SARS-CoV-2 proteins are widely used for the epidemiological assessment of COVID-19. The Health Care Workers (HCWs) are presumably exposed to a higher risk of acquiring the ... ...

    Abstract Abstract Background The serological evaluations of IgG, IgM, and IgA to the SARS-CoV-2 proteins are widely used for the epidemiological assessment of COVID-19. The Health Care Workers (HCWs) are presumably exposed to a higher risk of acquiring the disease owing to their regular contact with the patients. Methods COVID-19 prevalence was investigated by classifying 313 HCWs into four groups based on their degree of exposure and estimating the IgG and total antibody. The serological assessment of the anti-SARS-CoV-2 antibody was conducted 21 days post-vaccination of first or both doses of the ChAdOx1 nCoV-19 vaccine among 174 HCWs. The vaccinated HCWs were followed up for 3 months for SARS-CoV-2 infection. Findings The levels of anti-SARS-CoV-2 IgG were comparable among different groups, but the seroprevalence gradually decreased from the most exposed to the less exposed group. The neutralizing antibody was positively correlated with IgG as well as total antibody. IgG was marginally decreased after 2 months followed by a significant drop after 4-6 months post-infection. However, 80% of the HCWs developed a detectable amount of IgG after the first dose of vaccination, the median titer of which was comparable to the seropositive HCWs after natural infection. Almost 100% of the HCWs developed antibodies after the second dose of vaccine with boosting effect among the seropositive HCWs. Although ~11.5% of the vaccinated HCWs were infected with the SARS-CoV-2, ~94% of them showed mild symptoms and recovered in home isolation without any O2 support. Interpretations The varying level of seroprevalence among the four groups suggested a stratified spread of the disease. One dose of SARS-CoV-2 vaccination was found to be effective in terms of the antibody titer, while the second dose was required to cover the larger population. The effectiveness of the ChAdOx1 nCoV-19 vaccine was noticeable due to the low rate of post-vaccination infection with moderate or severe symptoms.
    Keywords covid19
    Language English
    Publishing date 2021-07-22
    Publisher Cold Spring Harbor Laboratory Press
    Document type Article ; Online
    DOI 10.1101/2021.07.20.21260278
    Database COVID19

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  6. Article ; Online: Characterizations of SARS-CoV-2 mutational profile, spike protein stability and viral transmission.

    Laha, Sayantan / Chakraborty, Joyeeta / Das, Shantanab / Manna, Soumen Kanti / Biswas, Sampa / Chatterjee, Raghunath

    Infection, genetics and evolution : journal of molecular epidemiology and evolutionary genetics in infectious diseases

    2020  Volume 85, Page(s) 104445

    Abstract: The recent pandemic of SARS-CoV-2 infection has affected more than 3.0 million people worldwide with more than 200 thousand reported deaths. The SARS-CoV-2 genome has the capability of gaining rapid mutations as the virus spreads. Whole-genome sequencing ...

    Abstract The recent pandemic of SARS-CoV-2 infection has affected more than 3.0 million people worldwide with more than 200 thousand reported deaths. The SARS-CoV-2 genome has the capability of gaining rapid mutations as the virus spreads. Whole-genome sequencing data offers a wide range of opportunities to study mutation dynamics. The advantage of an increasing amount of whole-genome sequence data of SARS-CoV-2 intrigued us to explore the mutation profile across the genome, to check the genome diversity, and to investigate the implications of those mutations in protein stability and viral transmission. We have identified frequently mutated residues by aligning ~660 SARS-CoV-2 genomes and validated in 10,000 datasets available in GISAID Nextstrain. We further evaluated the potential of these frequently mutated residues in protein structure stability of spike glycoprotein and their possible functional consequences in other proteins. Among the 11 genes, surface glycoprotein, nucleocapsid, ORF1ab, and ORF8 showed frequent mutations, while envelop, membrane, ORF6, ORF7a and ORF7b showed conservation in terms of amino acid substitutions. Combined analysis with the frequently mutated residues identified 20 viral variants, among which 12 specific combinations comprised more than 97% of the isolates considered for the analysis. Some of the mutations across different proteins showed co-occurrences, suggesting their structural and/or functional interaction among different SARS-COV-2 proteins, and their involvement in adaptability and viral transmission. Analysis of protein structure stability of surface glycoprotein mutants indicated the viability of specific variants and are more prone to be temporally and spatially distributed across the globe. A similar empirical analysis of other proteins indicated the existence of important functional implications of several variants. Identification of frequently mutated variants among COVID-19 patients might be useful for better clinical management, contact tracing, and containment of the disease.
    MeSH term(s) Humans ; Models, Molecular ; Mutation ; Phylogeny ; Protein Conformation ; Protein Domains ; SARS-CoV-2/genetics ; Sequence Alignment ; Spike Glycoprotein, Coronavirus/chemistry ; Spike Glycoprotein, Coronavirus/genetics ; Whole Genome Sequencing
    Chemical Substances Spike Glycoprotein, Coronavirus
    Keywords covid19
    Language English
    Publishing date 2020-06-30
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 2037068-4
    ISSN 1567-7257 ; 1567-1348
    ISSN (online) 1567-7257
    ISSN 1567-1348
    DOI 10.1016/j.meegid.2020.104445
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Dysbiosis of Oral Microbiota During Oral Squamous Cell Carcinoma Development.

    Sarkar, Purandar / Malik, Samaresh / Laha, Sayantan / Das, Shantanab / Bunk, Soumya / Ray, Jay Gopal / Chatterjee, Raghunath / Saha, Abhik

    Frontiers in oncology

    2021  Volume 11, Page(s) 614448

    Abstract: Infection with specific pathogens and alterations in tissue commensal microbial composition are intricately associated with the development of many human cancers. Likewise, dysbiosis of oral microbiome was also shown to play critical role in the ... ...

    Abstract Infection with specific pathogens and alterations in tissue commensal microbial composition are intricately associated with the development of many human cancers. Likewise, dysbiosis of oral microbiome was also shown to play critical role in the initiation as well as progression of oral cancer. However, there are no reports portraying changes in oral microbial community in the patients of Indian subcontinent, which has the highest incidence of oral cancer per year, globally. To establish the association of bacterial dysbiosis and oral squamous cell carcinoma (OSCC) among the Indian population, malignant lesions and anatomically matched adjacent normal tissues were obtained from fifty well-differentiated OSCC patients and analyzed using 16S rRNA V3-V4 amplicon based sequencing on the MiSeq platform. Interestingly, in contrast to the previous studies, a significantly lower bacterial diversity was observed in the malignant samples as compared to the normal counterpart. Overall our study identified
    Language English
    Publishing date 2021-02-23
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2649216-7
    ISSN 2234-943X
    ISSN 2234-943X
    DOI 10.3389/fonc.2021.614448
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Characterizations of SARS-CoV-2 mutational profile, spike protein stability and viral transmission

    Laha, Sayantan / Chakraborty, Joyeeta / Das, Shantanab / Manna, Soumen Kanti / Biswas, Sampa / Chatterjee, Raghunath

    bioRxiv

    Abstract: The recent pandemic of SARS-CoV-2 infection has affected more than 3.0 million people worldwide with more than 200 thousand reported deaths. The SARS-CoV-2 genome has a capability of gaining rapid mutations as the virus spreads. Whole genome sequencing ... ...

    Abstract The recent pandemic of SARS-CoV-2 infection has affected more than 3.0 million people worldwide with more than 200 thousand reported deaths. The SARS-CoV-2 genome has a capability of gaining rapid mutations as the virus spreads. Whole genome sequencing data offers a wide range of opportunities to study the mutation dynamics. The advantage of increasing amount of whole genome sequence data of SARS-CoV-2 intrigued us to explore the mutation profile across the genome, to check the genome diversity and to investigate the implications of those mutations in protein stability and viral transmission. Four proteins, surface glycoprotein, nucleocapsid, ORF1ab and ORF8 showed frequent mutations, while envelop, membrane, ORF6 and ORF7a proteins showed conservation in terms of amino acid substitutions. Some of the mutations across different proteins showed co-occurrence, suggesting their functional cooperation in stability, transmission and adaptability. Combined analysis with the frequently mutated residues identified 20 viral variants, among which 12 specific combinations comprised more than 97% of the isolates considered for the analysis. Analysis of protein structure stability of surface glycoprotein mutants indicated viability of specific variants and are more prone to be temporally and spatially distributed across the globe. Similar empirical analysis of other proteins indicated existence of important functional implications of several variants. Analysis of co-occurred mutants indicated their structural and/or functional interaction among different SARS-COV-2 proteins. Identification of frequently mutated variants among COVID-19 patients might be useful for better clinical management, contact tracing and containment of the disease.
    Keywords covid19
    Publisher BioRxiv; WHO
    Document type Article ; Online
    DOI 10.1101/2020.05.03.066266
    Database COVID19

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  9. Article ; Online: Characterizations of SARS-CoV-2 mutational profile, spike protein stability and viral transmission

    Laha, Sayantan / Chakraborty, Joyeeta / Das, Shantanab / Biswas, Sampa / Manna, Soumen Kanti / Chatterjee, Raghunath

    bioRxiv

    Abstract: The recent pandemic of SARS-CoV-2 infection has affected more than 3.0 million people worldwide with more than 200 thousand reported deaths. The SARS-CoV-2 genome has a capability of gaining rapid mutations as the virus spreads. Whole genome sequencing ... ...

    Abstract The recent pandemic of SARS-CoV-2 infection has affected more than 3.0 million people worldwide with more than 200 thousand reported deaths. The SARS-CoV-2 genome has a capability of gaining rapid mutations as the virus spreads. Whole genome sequencing data offers a wide range of opportunities to study the mutation dynamics. The advantage of increasing amount of whole genome sequence data of SARS-CoV-2 intrigued us to explore the mutation profile across the genome, to check the genome diversity and to investigate the implications of those mutations in protein stability and viral transmission. Four proteins, surface glycoprotein, nucleocapsid, ORF1ab and ORF8 showed frequent mutations, while envelop, membrane, ORF6 and ORF7a proteins showed conservation in terms of amino acid substitutions. Some of the mutations across different proteins showed co-occurrence, suggesting their functional cooperation in stability, transmission and adaptability. Combined analysis with the frequently mutated residues identified 20 viral variants, among which 12 specific combinations comprised more than 97% of the isolates considered for the analysis. Analysis of protein structure stability of surface glycoprotein mutants indicated viability of specific variants and are more prone to be temporally and spatially distributed across the globe. Similar empirical analysis of other proteins indicated existence of important functional implications of several variants. Analysis of co-occurred mutants indicated their structural and/or functional interaction among different SARS-COV-2 proteins. Identification of frequently mutated variants among COVID-19 patients might be useful for better clinical management on contact tracing and containment of the disease.
    Keywords covid19
    Language English
    Publishing date 2020-05-04
    Publisher Cold Spring Harbor Laboratory
    Document type Article ; Online
    DOI 10.1101/2020.05.03.066266
    Database COVID19

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  10. Article ; Online: Characterizations of SARS-CoV-2 mutational profile, spike protein stability and viral transmission

    Laha, Sayantan / Chakraborty, Joyeeta / Das, Shantanab / Manna, Soumen Kanti / Biswas, Sampa / Chatterjee, Raghunath

    Infection, Genetics and Evolution

    2020  Volume 85, Page(s) 104445

    Keywords Microbiology (medical) ; Genetics ; Ecology, Evolution, Behavior and Systematics ; Molecular Biology ; Microbiology ; Infectious Diseases ; covid19
    Language English
    Publisher Elsevier BV
    Publishing country us
    Document type Article ; Online
    ZDB-ID 2037068-4
    ISSN 1567-1348
    ISSN 1567-1348
    DOI 10.1016/j.meegid.2020.104445
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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