Effect of catechin on bone marrow cell cycle and gene expression of hematopoietic growth factors / 药学学报

<p><b>AIM</b>To study the effect of catechin, the active component of Spatholobus suberectus Dunn, on bone marrow cell cycle and the expression of IL-6 and GM-CSF mRNA in spleen cells of normal and marrow-depressed mice in order to clarify the mechanism of hematopoietic-supportive effect of catechin.</p><p><b>METHODS</b>Flow cytometry was adopted to investigate the influence of catechin on bone marrow cell cycle in mice and the expression of IL-6 and GM-CSF mRNA induced by catechin in spleen cells was detected by RT-PCR technique simultaneously.</p><p><b>RESULTS</b>The cell proportion of normal and marrow-depressed mice in G0/G1 phase was reduced significantly, while that in S + G2/M phase increased significantly. Being induced by catechin, IL-6 mRNA and GM-CSF mRNA in spleen cells were markedly up-regulated.</p><p><b>CONCLUSION</b>Catechin (2 g x L(-1), intraperitoneally injected to mice daily immediately after irradiation for 7 consecutive days) was shown to promote the expression of IL-6 mRNA and GM-CSF mRNA in spleen cells of mice, through which it can accelerate bone marrow cells of normal mice into cell cycle and help those of marrow-depressed mice to get out of "G1-phase-block", enter into cell cycle and radically accelerate the proliferation and differentiation of hematopoietic stem cell/hematopoietic progenitor cell (HSC/HPC).</p>

Effects of yishenjiangyafang on blood pressure and protecting renal function in RPH rats / 中国中药杂志

<p><b>OBJECTIVE</b>To study the effects and mechanism of Yishenjiangyafang, a prescription of Chinese traditional herbs used for renal hypertension, on blood pressure and protecting renal function of RPH rats.</p><p><b>METHOD</b>The 5/6 kidney of rat was resected to set up the RPH rat model. Blood pressure, Cr(creatinine), Ccr(creatinine clearance) and BUN(urea nitrogen) were measured dynamically. After eight weeks treatment, plasma content of PAR A II TXB2, 6-keto-PGF1 were measured. At same time, The change of renal pathology was observed.</p><p><b>RESULT</b>Yishenjiangyafang could reduce blood pressure Cr, but had no effect on BUN of RPH rat. The indexes of PAR, A II of each different dosage group of Yishenjiangyafang were decreased. At the same time, it reduced plasma content of TXB2, and increased 6-keto-PGF1 alpha. Glomerulosclerosis and atrophy of renal tubule in Yishenjiangyafang group RPH rats were better than those of the contrast group and the Capten group.</p><p><b>CONCLUSION</b>Yishenjiangyafang can reduce blood pressure of RPH rats and has protective effects on its kidney. Yishenjiangyafang can perform its effects of reducing blood pressure and protecting kidney by influencing the RAS of RPH rats.</p>

Effect of SS8, the active part of Spatholobus suberectus Dunn, on proliferation of hematopoietic progenitor cells in mice with bone marrow depression / 中国中药杂志

<p><b>OBJECTIVE</b>To investigate the effect of SS8, a monomer extracted from Spatholobus suberectus Dunn used for invigorating the circulation of blood, on proliferation of hematopoietic progenitor cells in mice with bone marrow depression.</p><p><b>METHOD</b>The method of semi-solid culture with methylcellulose of CFU-GM, CFU-E, BFU-E, CFU-Meg was adopted in bone marrow depressed mice which were treated with SS8 for a long time.</p><p><b>RESULT</b>The experimental data demonstrated that the numbers of CFU-GM, CFU-E, BFU-E, CFU-Meg in bone marrow depressed mice were raised distinctly under the control of SS8 as compared with those of contrast group. The effect of SS8 became stronger as time went on and the dosage rose.</p><p><b>CONCLUSION</b>SS8 can distinctly stimulate the proliferation of hematopoietec progenitor cells in mice with bone marrow depression in a time-and-dosagedependent manner.</p>