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Current Molecular Medicine


ISSN (Print): 1566-5240
ISSN (Online): 1875-5666

Research Article

An In vivo Immunohistochemical Study on MacroH2A.1 in Lung and Lymph-Node Tissues Exposed to an Asbestiform Fiber

Author(s): Carla Loreto*, Claudia Lombardo, Rosario Caltabiano, Caterina Ledda, Maria Hagnas, Vera Filetti and Venerando Rapisarda

Volume 20, Issue 8, 2020

Page: [653 - 660] Pages: 8

DOI: 10.2174/1566524020666200220130023

Price: $65


Aims: The aim of this study was to investigate MacroH2A.1 immunoexpression in tissues of sheep exposed to FE.

Background: The correlation between asbestiform fibers, lung cancer, pleural mesothelioma, and other lung diseases is already well established as the pathophisiological pathophysiological respiratory mechanisms involved by inhalation of Fluoro-edenite (FE). The latter is represented by cell proliferation and inducing the release of growth factors, cytokines, and reactive oxygen and nitrite species, with DNA damage that causes chronic inflammation and carcinogenesis. MacroH2A.1, and histone variant, seems to play a role in sensing the metabolic state of the cell and linking it with chromatin. Physiologically, MacroH2A.1 is expressed at low levels in stem cells and it became upregulated during differentiation, preventing reprogramming of induced pluripotent stem cells and after nuclear transfer. In particular, MacroH2A.1 has been shown to explicate a potent antitumor mechanism in vivo as it results upregulated in senescent cells determining a permanent growth-arrest.

Objective: Evaluate the possible role of the histone variant in the organism in response to deep insight understanding the mechanisms of toxicity and the cellular response to FE.

Methods: Lung and lymph nodes of exposed sheep were selected. Samples were processed for histological and immunihistochemical immunohistochemical evaluations. Densitometric, morphometric, and statistical analysis analyses were conducted.

Results: Tissue sections of FE exposed sheep demonstrated overexpression of MacroH2A.1 vs unexposed samples. The data suggest an involvement of these this molecule in the cellular response triggered by FE directed exposure.

Conclusion: In this contest, MacroH2A.1 overexpression supports its function as an epigenetic stabilizer that helps to establish and maintain differentiated states.

Keywords: Lung, Asbestos, Cancer, Tumor, H2AFY, Core histone Macro-H2A.1, Metabolism.

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