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  1. Article ; Online: Mesenchymal stem cells (MSCs) from the mouse bone marrow show differential expression of interferon regulatory factors IRF-1 and IRF-2.

    Chaudhary, Jitendra Kumar / Ahamad, Naseem / Rath, Pramod C

    Molecular biology reports

    2024  Volume 51, Issue 1, Page(s) 97

    Abstract: Background: Interferon regulatory factors (IRF-1 and IRF-2) are transcription factors widely implicated in various cellular processes, including regulation of inflammatory responses to pathogens, cell proliferation, oncogenesis, differentiation, ... ...

    Abstract Background: Interferon regulatory factors (IRF-1 and IRF-2) are transcription factors widely implicated in various cellular processes, including regulation of inflammatory responses to pathogens, cell proliferation, oncogenesis, differentiation, autophagy, and apoptosis.
    Methods: We have studied the expression of IRF-1, IRF-2 mRNAs by RT-PCR, cellular localization of the proteins by immunofluorescence, and expression of mRNAs of genes regulated by IRF-1, IRF-2 by RT-PCR in mouse bone marrow cells (BMCs) and mesenchymal stem cells (MSCs).
    Results: Higher level of IRF-1 mRNA was observed in BMCs and MSCs compared to that of IRF-2. Similarly, differential expression of IRF-1 and IRF-2 proteins was observed in BMCs and MSCs. IRF-1 was predominantly localized in the cytoplasm, whereas IRF-2 was localized in the nuclei of BMCs. MSCs showed nucleo-cytoplasmic distribution of IRF-1 and nuclear localization of IRF-2. Constitutive expression of IRF-1 and IRF-2 target genes: monocyte chemoattractant protein-1 (MCP-1), vascular cell adhesion molecule-1 (VCAM-1), cyclooxygenase-2 (COX-2), matrix metalloproteinase-9 (MMP-9), and caspase-1 was observed in both BMCs and MSCs. MSCs showed constitutive expression of the pluripotency-associated factors, Oct3/4 and Sox-2. Lipopolysaccharide (LPS)-treatment of MSCs induced prominent cellular localization of IRF-1 and IRF-2.
    Conclusions: Our results suggest that IRF-1 and IRF-2 exhibit differential expression of their mRNAs and subcellular localization of the proteins in BMCs and MSCs. These cells also show differential levels of constitutive expression of IRF-1 and IRF-2 target genes. This may regulate immune-responsive properties of BMCs and MSCs through IRF-1, IRF-2-dependent gene expression and protein-protein interaction. Regulating IRF-1 and IRF-2 may be helpful for immunomodulatory functions of MSCs for cell therapy and regenerative medicine.
    MeSH term(s) Animals ; Mice ; Bone Marrow ; Bone Marrow Cells ; Cytoplasm ; Interferon Regulatory Factors/genetics ; Mesenchymal Stem Cells
    Chemical Substances Interferon Regulatory Factors ; Irf1 protein, mouse ; Irf2 protein, mouse
    Language English
    Publishing date 2024-01-09
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 186544-4
    ISSN 1573-4978 ; 0301-4851
    ISSN (online) 1573-4978
    ISSN 0301-4851
    DOI 10.1007/s11033-023-09025-9
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Using Omics to Study Leprosy, Tuberculosis, and Other Mycobacterial Diseases.

    Ahamad, Naseem / Gupta, Saurabh / Parashar, Deepak

    Frontiers in cellular and infection microbiology

    2022  Volume 12, Page(s) 792617

    Abstract: Mycobacteria are members of the Actinomycetales order, and they are classified into one family, Mycobacteriaceae. More than 20 mycobacterial species cause disease in humans. The Mycobacterium group, called ... ...

    Abstract Mycobacteria are members of the Actinomycetales order, and they are classified into one family, Mycobacteriaceae. More than 20 mycobacterial species cause disease in humans. The Mycobacterium group, called the
    MeSH term(s) Animals ; Genomics ; Humans ; Leprosy/diagnosis ; Mycobacterium tuberculosis/genetics ; Proteomics ; Tuberculosis
    Language English
    Publishing date 2022-02-24
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2619676-1
    ISSN 2235-2988 ; 2235-2988
    ISSN (online) 2235-2988
    ISSN 2235-2988
    DOI 10.3389/fcimb.2022.792617
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Increasing cytosolic Ca

    Ahamad, Naseem / Sun, Yuyang / Singh, Brij B

    Stem cell research

    2021  Volume 56, Page(s) 102560

    Abstract: Aging is an inescapable complex physiological but extendable process, and all cells, including stem cells, are altered over time. Diverse mechanism(s) could modulate stem cell number, their proliferation rate, and promote tissue repair during aging that ... ...

    Abstract Aging is an inescapable complex physiological but extendable process, and all cells, including stem cells, are altered over time. Diverse mechanism(s) could modulate stem cell number, their proliferation rate, and promote tissue repair during aging that leads to longevity. However, the factors that could restore aging stem cell potency and would lead to healthy aging are not fully identified. Here we show that maintaining cytosolic Ca
    MeSH term(s) Animals ; Calcium/metabolism ; Calcium Channels ; Cell Proliferation ; Cells, Cultured ; Mesenchymal Stem Cells/metabolism ; Mice ; ORAI1 Protein ; Stem Cells/metabolism ; Stromal Interaction Molecule 1 ; TRPC Cation Channels
    Chemical Substances Calcium Channels ; ORAI1 Protein ; Stromal Interaction Molecule 1 ; TRPC Cation Channels ; Calcium (SY7Q814VUP)
    Language English
    Publishing date 2021-10-03
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 2393143-7
    ISSN 1876-7753 ; 1873-5061
    ISSN (online) 1876-7753
    ISSN 1873-5061
    DOI 10.1016/j.scr.2021.102560
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Expression of interferon regulatory factors (IRF-1 and IRF-2) during radiation-induced damage and regeneration of bone marrow by transplantation in mouse

    Ahamad, Naseem / Rath, Pramod C

    Molecular biology reports. 2019 Feb., v. 46, no. 1

    2019  

    Abstract: Interferon regulatory factors (IRF-1 and IRF-2) are transcription factors of IRF-family that regulate expression of genes for cytokines, chemokines and growth factors in mammalian cells. IRF-1 and IRF-2 play crucial roles in the differentiation of bone ... ...

    Abstract Interferon regulatory factors (IRF-1 and IRF-2) are transcription factors of IRF-family that regulate expression of genes for cytokines, chemokines and growth factors in mammalian cells. IRF-1 and IRF-2 play crucial roles in the differentiation of bone marrow cells for immune response. Bone marrow (BM) is the soft lymphoid organ that contains many types of stem cells and produces different types of cells of the blood and immune system. Genetic alterations and damage of the bone marrow cells can lead to different types of blood and immune system-related diseases including anemia and cancer. We have studied the expression of IRF-1 and IRF-2 during radiation-induced damage and regeneration of bone marrow cells after transplantation of freshly isolated bone marrow cells in the mouse. Cell cycle analysis, colony forming unit-fibroblast (CFU-F) assay and bone marrow histology showed that after radiation-induced damage, the bone marrow transplantation resulted in regeneration of the bone marrow up to 24–35% recovery. Real-time quantitative reverse transcription-polymerase chain reaction (Q-RT-PCR) for the mRNA expression showed that IRF-1 and IRF-2 were expressed at higher levels in the bone marrow cells of the irradiated (4.34× fold for IRF-1, and 3.87× fold for IRF-2) compared to control and transplanted (1.13× fold for IRF-1, and 1.12× fold IRF-2) mice and immuno-fluorescence analysis for the protein expression showed that IRF-1 and IRF-2 were expressed at higher levels in the bone marrow cells of the irradiated (2.12× fold for IRF-1 and 1.71× fold for IRF-2) compared to control and transplanted (1.73× fold for IRF-1 and 1.21× fold for IRF-2) mice. Thus, IRF-1 and IRF-2 are sensitive and responsive to radiation-induced damage in the bone marrow cells and may also be involved in the bone marrow regeneration process.
    Keywords anemia ; blood ; bone marrow ; bone marrow cells ; bone marrow transplant ; cell cycle ; chemokines ; gene expression ; growth factors ; histology ; immune response ; interferon regulatory factor-1 ; interferon regulatory factor-2 ; irradiation ; lymphatic system ; messenger RNA ; mice ; neoplasms ; protein synthesis ; stem cells
    Language English
    Dates of publication 2019-02
    Size p. 551-567.
    Publishing place Springer Netherlands
    Document type Article
    ZDB-ID 186544-4
    ISSN 1573-4978 ; 0301-4851
    ISSN (online) 1573-4978
    ISSN 0301-4851
    DOI 10.1007/s11033-018-4508-x
    Database NAL-Catalogue (AGRICOLA)

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  5. Article ; Online: Expression of interferon regulatory factors (IRF-1 and IRF-2) during radiation-induced damage and regeneration of bone marrow by transplantation in mouse.

    Ahamad, Naseem / Rath, Pramod C

    Molecular biology reports

    2018  Volume 46, Issue 1, Page(s) 551–567

    Abstract: Interferon regulatory factors (IRF-1 and IRF-2) are transcription factors of IRF-family that regulate expression of genes for cytokines, chemokines and growth factors in mammalian cells. IRF-1 and IRF-2 play crucial roles in the differentiation of bone ... ...

    Abstract Interferon regulatory factors (IRF-1 and IRF-2) are transcription factors of IRF-family that regulate expression of genes for cytokines, chemokines and growth factors in mammalian cells. IRF-1 and IRF-2 play crucial roles in the differentiation of bone marrow cells for immune response. Bone marrow (BM) is the soft lymphoid organ that contains many types of stem cells and produces different types of cells of the blood and immune system. Genetic alterations and damage of the bone marrow cells can lead to different types of blood and immune system-related diseases including anemia and cancer. We have studied the expression of IRF-1 and IRF-2 during radiation-induced damage and regeneration of bone marrow cells after transplantation of freshly isolated bone marrow cells in the mouse. Cell cycle analysis, colony forming unit-fibroblast (CFU-F) assay and bone marrow histology showed that after radiation-induced damage, the bone marrow transplantation resulted in regeneration of the bone marrow up to 24-35% recovery. Real-time quantitative reverse transcription-polymerase chain reaction (Q-RT-PCR) for the mRNA expression showed that IRF-1 and IRF-2 were expressed at higher levels in the bone marrow cells of the irradiated (4.34× fold for IRF-1, and 3.87× fold for IRF-2) compared to control and transplanted (1.13× fold for IRF-1, and 1.12× fold IRF-2) mice and immuno-fluorescence analysis for the protein expression showed that IRF-1 and IRF-2 were expressed at higher levels in the bone marrow cells of the irradiated (2.12× fold for IRF-1 and 1.71× fold for IRF-2) compared to control and transplanted (1.73× fold for IRF-1 and 1.21× fold for IRF-2) mice. Thus, IRF-1 and IRF-2 are sensitive and responsive to radiation-induced damage in the bone marrow cells and may also be involved in the bone marrow regeneration process.
    MeSH term(s) Animals ; Bone Marrow/immunology ; Bone Marrow Cells/cytology ; Bone Marrow Transplantation/methods ; Cell Differentiation ; Gene Expression Regulation/genetics ; Intercellular Signaling Peptides and Proteins/metabolism ; Interferon Regulatory Factor-1/genetics ; Interferon Regulatory Factor-1/metabolism ; Interferon Regulatory Factor-2/genetics ; Interferon Regulatory Factor-2/metabolism ; Interferon Regulatory Factors/genetics ; Interferon Regulatory Factors/metabolism ; Mice ; Mice, Inbred C57BL ; RNA, Messenger/genetics ; Regeneration/genetics ; Repressor Proteins/metabolism ; Stem Cells/metabolism
    Chemical Substances Intercellular Signaling Peptides and Proteins ; Interferon Regulatory Factor-1 ; Interferon Regulatory Factor-2 ; Interferon Regulatory Factors ; RNA, Messenger ; Repressor Proteins
    Language English
    Publishing date 2018-11-28
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 186544-4
    ISSN 1573-4978 ; 0301-4851
    ISSN (online) 1573-4978
    ISSN 0301-4851
    DOI 10.1007/s11033-018-4508-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Calcium Signaling Regulates Autophagy and Apoptosis.

    Sukumaran, Pramod / Nascimento Da Conceicao, Viviane / Sun, Yuyang / Ahamad, Naseem / Saraiva, Luis R / Selvaraj, Senthil / Singh, Brij B

    Cells

    2021  Volume 10, Issue 8

    Abstract: ... Calcium ( ... ...

    Abstract Calcium (Ca
    MeSH term(s) Animals ; Autophagy/physiology ; Calcium/metabolism ; Calcium Channels/metabolism ; Calcium Signaling/physiology ; Humans ; Stem Cells/metabolism
    Chemical Substances Calcium Channels ; Calcium (SY7Q814VUP)
    Language English
    Publishing date 2021-08-18
    Publishing country Switzerland
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Review
    ZDB-ID 2661518-6
    ISSN 2073-4409 ; 2073-4409
    ISSN (online) 2073-4409
    ISSN 2073-4409
    DOI 10.3390/cells10082125
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Differential activation of Ca

    Ahamad, Naseem / Sun, Yuyang / Nascimento Da Conceicao, Viviane / Xavier Paul Ezhilan, Caroline R D / Natarajan, Mohan / Singh, Brij B

    NPJ Regenerative medicine

    2021  Volume 6, Issue 1, Page(s) 67

    Abstract: Stem cells have indefinite self-renewable capability; however, factors that modulate their pluripotency/function are not fully identified. Here we show that store-dependent ... ...

    Abstract Stem cells have indefinite self-renewable capability; however, factors that modulate their pluripotency/function are not fully identified. Here we show that store-dependent Ca
    Language English
    Publishing date 2021-10-20
    Publishing country United States
    Document type Journal Article
    ISSN 2057-3995
    ISSN (online) 2057-3995
    DOI 10.1038/s41536-021-00180-w
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Self-Assembly of Artificial Sweetener Aspartame Yields Amyloid-like Cytotoxic Nanostructures.

    Anand, Bibin Gnanadhason / Prajapati, Kailash Prasad / Dubey, Kriti / Ahamad, Naseem / Shekhawat, Dolat Singh / Rath, Pramod Chandra / Joseph, George Kodimattam / Kar, Karunakar

    ACS nano

    2019  Volume 13, Issue 5, Page(s) 6033–6049

    Abstract: Recent reports have revealed the intrinsic propensity of single aromatic metabolites to undergo self-assembly and form nanostructures of amyloid nature. Hence, identifying whether aspartame, a universally consumed artificial sweetener, is inherently ... ...

    Abstract Recent reports have revealed the intrinsic propensity of single aromatic metabolites to undergo self-assembly and form nanostructures of amyloid nature. Hence, identifying whether aspartame, a universally consumed artificial sweetener, is inherently aggregation prone becomes an important area of investigation. Although the reports on aspartame-linked side effects describe a multitude of metabolic disorders, the mechanistic understanding of such destructive effects is largely mysterious. Since aromaticity, an aggregation-promoting factor, is intrinsic to aspartame's chemistry, it is important to know whether aspartame can undergo self-association and if such a property can predispose any cytotoxicity to biological systems. Our study finds that aspartame molecules, under mimicked physiological conditions, undergo a spontaneous self-assembly process yielding regular β-sheet-like cytotoxic nanofibrils of amyloid nature. The resultant aspartame fibrils were found to trigger amyloid cross-seeding and become a toxic aggregation trap for globular proteins, Aβ peptides, and aromatic metabolites that convert native structures to β-sheet-like fibrils. Aspartame fibrils were also found to induce hemolysis, causing DNA damage resulting in both apoptosis and necrosis-mediated cell death. Specific spatial arrangement between aspartame molecules is predicted to form a regular amyloid-like architecture with a sticky exterior that is capable of promoting viable H-bonds, electrostatic interactions, and hydrophobic contacts with biomolecules, leading to the onset of protein aggregation and cell death. Results reveal that the aspartame molecule is inherently amyloidogenic, and the self-assembly of aspartame becomes a toxic trap for proteins and cells, exposing the bitter side of such a ubiquitously used artificial sweetener.
    MeSH term(s) Amyloid/adverse effects ; Amyloid/chemistry ; Amyloid beta-Peptides/chemistry ; Aspartame/adverse effects ; Aspartame/chemistry ; Cell Proliferation/drug effects ; Hemolysis/drug effects ; Humans ; Hydrophobic and Hydrophilic Interactions ; Metabolic Diseases/chemically induced ; Metabolic Diseases/genetics ; Metabolic Diseases/pathology ; Nanofibers/chemistry ; Nanostructures/adverse effects ; Nanostructures/chemistry ; Protein Conformation, beta-Strand/drug effects ; Sweetening Agents/adverse effects ; Sweetening Agents/chemistry
    Chemical Substances Amyloid ; Amyloid beta-Peptides ; Sweetening Agents ; Aspartame (Z0H242BBR1)
    Language English
    Publishing date 2019-05-06
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1936-086X
    ISSN (online) 1936-086X
    DOI 10.1021/acsnano.9b02284
    Database MEDical Literature Analysis and Retrieval System OnLINE

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