Publications (2)0 Total impact
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ABSTRACT: This study investigated the effect of phloretin (Ph) on the proliferation, activation, and cell-cycle distribution of mouse T lymphocytes and NO production and phagocytosis of macrophages. Carboxyfluorescein diacetatesuccinimidyl ester (CFDA-SE) staining plus flow cytometry assay was employed to obtain the proliferation-related index (PI) of lymphocytes. The expression levels of CD69 and CD25 on T lymphocytes stimulated with Con A were evaluated with flow cytometry after staining with fluorescent monoclonal antibody. Cell-cycle distribution of T lymphocytes was analyzed by propidium iodide staining. Griess kit was used to evaluate the NO production and fluorescent microbeads were used to analyze the phagocytosis ability of macrophages. Our results showed that phloretin (40, 60, and 80 micromol x L(-7)) significantly inhibited the proliferation of T lymphocytes and the PI reduced from 1.41 +/- 0.13 to 1.34 +/- 0.16, 1.19 +/- 0.12 and 1.07 +/- 0.06, respectively. Phloretin significantly inhibited the expression of CD69 and CD25 (P < 0.01). The cell cycle distribution analysis showed that phloretin could induce a cell cycle arrest at G0/G1 phase. NO production of LPS +IFN-gamma group of macrophages was (26.72 +/- 3.57) micromol x L(-1), and was significantly reduced by phloretin (P < 0.01). And phagocytosis rate of macrophages was significantly reduced by phloretin (P < 0.01). The results demonstrate that phloretin might be developed into a new immuosuppressive drug.Yao xue xue bao = Acta pharmaceutica Sinica 06/2009; 44(5):480-5.
Article: [Effects of Hesperetin on cell activation and proliferation of murine T lymphocytes in vitro].[show abstract] [hide abstract]
ABSTRACT: The effect of Hesperetin (Hes) on activation and proliferation of murine T lymphocytes in vitro as well as its mechanism of action is investigated to provide a theory for developing an immunosuppressive agent. The lymphocytes were cocultured with Concanavalin A (ConA) and Hes together. Fluorescence conjugated monoclonal antibodies and flow cytometry were used to detect the expression of CD69 of activated T lymphcytes in vitro in response to ConA. MTT test was used to estimate the effect of Hes on proliferation of lymphocytes stimulated by ConA and the toxic effect of Hes on lymphocytes. Proliferation of lymphocytes stimulated by ConA was detected by carboxyl fluorescein diacetate-succinimide ester (CFDA-SE) staining combined with flow cytometry, and the proliferation index (PI) was analyzed by means of ModFit software. The survival rate of lymphocytes shows that DMSO(0.2 mL/L)and Hes (25-75 micromol/L) had little side effect on murine lymphocytes in vitro; Hes can inhibit the activation and proliferation of T lymphocytes in response to ConA with noticed dosage-effect relation. Hes may has broad prospects to be developed as immunosuppressive drug through further studies.Xi bao yu fen zi mian yi xue za zhi = Chinese journal of cellular and molecular immunology 05/2009; 25(4):315-8.