In vitro peripheral blood mononuclear cell proliferation, cytokine secretion and oxidative stress modulation by pyrido[2,3-d] pyrimidines
作者:Amel Medjdoub、Fatima Belhadj、Amel Saidi Merzouk、Yamina Baba Hamed、Zahira Kibou、Noureddine Choukchou-Braham、Hafida Merzouk
DOI:10.1007/s11696-019-00924-5
日期:2020.3
The aim of this work was to study the in vitro effects of new pyrido[2,3-d] pyrimidines, especially 4-(N-phenylethylamino)-5,7-diphenylpyrido[2,3-d] pyrimidine (3a) and 4-(N-benzylamino)-5-(4-chlorophenyl)-7-(3-methoxyphenyl) pyrido[2,3-d]-pyrimidine (3b), on the proliferative responses of human peripheral blood mononuclear cells, cytokine secretion, ATP levels and intracellular redox status. Peripheral blood mononuclear cells were isolated using differential centrifugation on a density gradient of Histopaque. These cells were cultured with the mitogen concanavalin A (Con A) and with different concentrations of the compounds 3a and 3b (1–100 µM). Proliferation (MTT assay), IL-2, INFγ and IL-4 (Elisa kits), ATP levels, cytotoxic effect (micronucleus test) and oxidative markers (intracellular glutathione, superoxide dismutase, catalase, hydroperoxide and carbonyl protein contents) were investigated after 48-h incubation. Our results showed that 3a was immunostimulant at low concentrations but immunosuppressive at high concentrations (50, 100 µM) with a modulation of cytokine secretion. 3b was immunostimulant in a dose-dependent manner. 3a induced an increase in intracellular ATP levels at 1–25 µM but a decrease at 50–100 µM. In the presence of 3b, cell ATP contents increased with 3b concentrations. Peripheral blood mononuclear cell redox markers were consistent with the presence of an oxidative stress induced by high concentrations of 3a and 3b, with a significant increase in the micronucleus frequency in lymphocytes, suggesting cytotoxic effects. However, 3a at low concentrations (1–25 µM) tended to activate antioxidant defense in cells. In conclusion, 3a and 3b modulate cell-mediated immunity, cell energy and redox status at low concentrations.
这项工作的目的是研究新型
嘧啶并[2,3-d]
吡啶类化合物,特别是4-(N-苯乙基
氨基)-5,7-二
苯基嘧啶并[2,3-d]
吡啶(3a)和4-(N-苄基
氨基)-5-(4-
氯苯基)-7-(3-
甲氧基苯基)
嘧啶并[2,3-d]
吡啶(3b)对人外周血单个核细胞增殖反应、细胞因子分泌、
ATP水平和细胞内氧化还原状态的体外效应。外周血单个核细胞通过密度梯度离心法分离得到。这些细胞与促分裂原
刀豆蛋白A(Con A)和不同浓度的化合物3a和3b(1-100 µM)共培养。在48小时孵育后,研究了增殖(M
TT试验)、I
L-2、INFγ和IL-4(Elisa试剂盒)、
ATP水平、细胞毒效应(微核试验)和氧化标志物(细胞内
谷胱甘肽、超氧化物歧化酶、
过氧化氢酶、氢过氧化物和羰基蛋白含量)。我们的结果显示,3a在低浓度下具有免疫刺激作用,但在高浓度(50, 100 µM)下具有免疫抑制作用,并且调节细胞因子分泌。3b呈剂量依赖性地具有免疫刺激作用。3a在1-25 µM时增加细胞内
ATP水平,但在50-100 µM时降低。在存在3b的情况下,细胞
ATP含量随3b浓度增加而增加。外周血单个核细胞的氧化还原标志物与高浓度的3a和3b引起的氧化应激一致,淋巴细胞中微核频率显著增加,表明有细胞毒性效应。然而,低浓度的3a(1-25 µM)倾向于激活细胞的抗氧化防御。总之,3a和3b在低浓度下调节细胞介导的免疫、细胞能量和氧化还原状态。