Osteoclastogenesis in the nonadherent cell population of human bone marrow is inhibited by rhBMP-2 alone or together with rhVEGF.

During bone development and repair, angiogenesis, osteogenesis, and bone remodeling are closely associated processes that share some common mediators. In the present study nonadherent human bone marrow mononuclear cells under the induction of sRANKL and M-CSF, differentiated into osteoclasts with TRAP-positive staining, VNR expression, and Ca-P resorptive activity. The effects of various combinations of rhBMP-2 (0, 3, 30, and 300 ng/mL) and rhVEGF (0 and 25 ng/mL) on osteoclastogenesis potentials were examined in this experimental system. The percentages of TRAP-positive multiple nucleated cells represent osteoclast differentiation potential, and the percentages of resorptive areas in the Ca-P coated plates resemble osteoclast resorption capability. The presence of rhBMP-2 at 30 and 300 ng/mL showed inhibitory effects on osteoclast differentiation and their resorptive capability in the human osteoclast culture system. rhVEGF (25 ng/mL) enhanced the resorptive function of osteoclast whenever it was used alone or combined with 3 ng/mL rhBMP-2. However, rhVEGF-induced resorptive function was inhibited by 30 ng/mL and 300 ng/mL rhBMP-2 in a dose-dependent manner. Statistical analysis demonstrated that an interactive effect exists between rhBMP-2 and rhVEGF on human osteoclastogenesis. These findings suggested that an interactive regulation may exist between BMPs and VEGF signaling pathways during osteoclastogenesis; exact mechanisms are yet to be elucidated.     

转化生长因子在前列腺增生中作用的研究

目的：探讨转化生长因子α(TGF-α)和转化生长因子β(TGF-β)在良性前列腺增生症组织中的表达及意义。方法：利用免疫组织化学方法研究TGF-α和TGF-β在40例BPH组织和5例正常前列腺组织中的表达。结果：TGF-α在BPH组织上皮和间质中的表达强阳性率均高于正常前列腺组织(P＜0．01)。且TGF-α在BPH组织上皮组织的表达明显高于其在间质中的表达(P＜0．01)。TGF-β在BPH组织上皮和间质中的表达明显高于正常前列腺组织(P＜0．01)。且TGF-β在BPH组织间质中的表达明显高于其在上皮组织中的表达(P＜0.01)。结论：TGF-α在前列腺组织中表达增高，尤其在腔上皮细胞的胞浆中高度表达，TGF-β在前列腺包织中表达增高，尤其在间质组织中的过度表达，提示其可能直接或间接参与了前列腺间质细胞的分化和增殖，参与了BPH的病理过程。     

老年心功能不全血浆心钠素浓度的变化

采用放射免疫法测定31例老年心功能不全患者血浆心钠素(ANP)浓度,发现老年心功能不全组ANP明显低于对照组(P<0.01)。血浆ANP含量随心功能不全的严重程度而明显减少(P<0.05)。病程与ANP浓度呈负相关 (r=-0.441,P<0.05)。不同病种、不同受累部位及有或无房颤之间ANP差异无显著性(P<0.05)。     

Intracranial Extramedullary Hematopoiesis in β-thalassemia Major

A case of β-thalassemia major with a huge mass of hernatopoictic tissuc firmly attached tothe dura mater was reported This is the first case reported in China.     

加减化裁随证治之——何任治疗癌症学术经验探究(下)

癌症为深危重疾,对于绝大部分癌症患者,临床普遍采用手术、中医、化疗、放疗、生物等综合方法进行治疗。由于癌症的种类、所处阶段、先前采用的治疗方法以及病人体质等等的不同,求诊时病人的证     

大鼠胎胰胰岛组织培养及移植的实验观察

本实验对培养中的大鼠胎胰胰岛组织及其移植后的形态功能进行了观察。结果表明,大鼠胎胰经短期培养,不仅内分泌胰岛β细胞的活力保存良好,而且胰外分泌腺泡大大减少以致消失。21只糖尿病大鼠,同种移植经过7天培养的胎胰胰岛,未用免疫抑制剂,术后糖尿病缓解率76.2％。     

Draeger监护仪在围手术治疗中的作用

围手术治疗区域是现代综合性医院最重要的体现医院综合实力的科室之一，也是医院创收的重要科室之一，有数据表明，50%住院病人的花费在手术室，如何提高手术室的利用效率，确保病人和医护人员的安全，成为这个区域最重要的发展方向。     

关于麻醉药品使用剂量的探讨

本文从麻醉药品使用剂量的政策调整、使用中存在的问题及每张处方最大量应用举例诸方面,详细阐述了麻醉药品使用剂量问题,为今后进一步规范麻醉药品的使用和管理提供依据。     

Application of median-effect in quantitative analysis of antitumor drugs in vitro

Objective: To analyze quantitatively the synergistic and antagonistic effects of combined oxymatrine (OMT) and 5-fluorouracil (5-GU) on a cell line of human liver cancer (HepG2) with median-effect principle in vitro. Methods: The median-effect principle and MTT method were used in the quantitative analysis of effects of the two drugs. Results: Cytotoxic activity of the individual drugs enhanced as drug concentration increased. As fa=0.41, a CI equal to 1 indicated additivity; fa<0.41, a CI less than 1 indicated synergy; and fa>0.41, a CI greater than 1 indicated antagonism. The sequence of administration did not influence the cytotoxic activity of the combined antitumor drugs. The ratio of drug concentration was a factor that can influence the killing effect. Conclusion: The combined drugs interaction (CI<1) was synergistic at lower concentration and antagonistic at higher concentration. The ratio of drug concentration is a factor that can influence the killing effect. Biography: HE Song(1965–), male, doctor of medicine, associate professor, Chongqing Medical University, majors in gastroenterology.     

关于新型农村合作医疗有关问题的建议

新型农村合作医疗实施一年来，在各级党委政府的高度重视下，试点工作取得了一定成绩。但随着这项工作的逐步深入和规范，我们越来越感到，要想把新型农村合作医疗这项“德政工程”办好，绝对不是一朝一夕的事，还有许多事情要解决，需要不断地完善和规范。