Modulation of the immunological response of guinea pig mast cells by carbon monoxide.

Challenge of guinea pig mast cells with antigen under aerobic conditions induced the expected release of histamine and led to a significant increase in intracellular calcium ([Ca2+]i) and cyclic adenosine monophosphate (cAMP) levels. Prior exposure to CO decreased the immunological histamine release. This effect was accompanied by a decrease in the levels of [Ca2+]i and by an increase in the cyclic guanosine monophosphate (cGMP) levels. The exposure of mast cells to nitrogen (N2) did not modify the release of histamine. The CO-mediated inhibition of the immunological release of histamine was reversed by the soluble guanylate cyclase inhibitor (1 H-[1.2,4]oxadiazolo[4,3-a]quinoxalin-1-one, ODQ) and by oxyhaemoglobin (HbO2). Incubation of mast cells for 4 h with hemin, a heme oxygenase (HO) inducer, resulted in an increase in HO activity, measured as bilirubin production. Hemin abated the immunological release of histamine, in similar fashion to exogenous CO, and increased the cGMP levels. These effects were reversed by ODQ and HbO2. It is proposed that CO from an exogenous or endogenous source stimulates guanylyl cyclase and causes cGMP formation which then induces calcium to be sequestrated so that the [Ca2+]i concentration falls and histamine release is inhibited.     

冠状动脉损伤修复中Ⅲ型胶原的表达及其与血管平滑肌细胞增生的关系

目的;探讨血管损伤修复中Ⅲ型胶原的分泌规律及其与血管平滑肌细胞（ＶＳＭＣ）增生的关系,方法：２６只犬冠状动脉植入过大钽丝支架建立再狭窄模型,分别于术后７天,１４天和２８天处死动物,用透射电镜及免疫组化染色观察新生内膜中Ⅲ型胶原分泌和ＶＳＭＣ特征,并用图像处理技术对Ⅲ型胶原的染色密度作定量分析,结果：支架植入后７天以ＶＳＭＣ移行增生为主,１４天时ＶＳＭＣ增生达高峰并有较多胶原分泌,２８天时ＶＳＭＣ由     

微细药物表面包覆技术在制剂中的应用

新型药物开发制备过程中，需要对药物颗粒进行粒子设计，通过多层微胶囊化而得到复合包覆药物颗粒。药物包覆、微胶囊制备方法很多，可分为化学法、物理化学法、物理法。本文着重介绍了制备复合多层包覆药物颗粒的几种物理机械方法：复合杂化系统，高速椭圆转子混合法、喷流床包覆法。简要分析了该技术用于中药现代化加工的可能性。     

What is the difference between squamous cell carcinoma and adenocarcinoma of the cervix? A matched case–control study

The objective of this study was to investigate the efficacy of treatment strategies in patients with adenocarcinoma (AC) of the cervix and compare it with those with squamous cell carcinoma (SCC) of the cervix. Women with FIGO (1994) stage IB1 AC, especially pathologic tumor size of 2-4 cm, treated with class III hysterectomy, were compared with those with SCC treated with comparable strategy in a case-controlled study. Eighty patients (20 cases, 60 controls) were analyzed. Lymphvascular space invasion (P = 0.01) and lymph node metastasis (P = 0.07) were more frequent in patients with SCC than in those with AC. However, there was no significant difference in depth of stromal invasion (P = 0.51) and invasion of the parametrium (P = 0.44) between two groups. And there was also no statistically significant difference in disease-free survival (P = 0.86) and overall survival (P = 0.89) between two groups. Primary radical surgery followed by adjuvant therapy, same as for SCC, would be acceptable for AC with pathologic tumor size of 2-4 cm. Although it was difficult to determine whether AC recurred more systemically, more effective treatment strategies than those currently available for AC should be considered to reduce the systemic recurrence.     

Tear of the distal biceps branchii tendon: A new method of ultrasound evaluation

Tear of the distal biceps brachii tendon is an uncommon injury. Ultrasound evaluation of the distal tendon using an anterior approach is often difficult because of technical factors. We describe a new method of ultrasound evaluation of the distal biceps tendon insertion. This involves a posterior approach with the forearm pronated. With pronation of the forearm, the radial tuberosity faces posteriorly, bringing the distal biceps tendon insertion into view. A surgically proven case of distal biceps tendon tear is presented to illustrate our technique.     

Achilles tendinopathy after treatment with fluoroquinolone

Fluoroquinolone antibiotic therapy is a recognized but poorly understood cause for Achilles tendinopathy. We report here a patient who developed bilateral partial Achilles tendon tears as a result of fluoroquinolone therapy. Ultrasound and MRI were both useful in identifying and distinguishing between Achilles tendinosis and tendon rupture. The current published literature on this problem was also reviewed.     

Coronary subclavian steal syndrome

Coronary subclavian steal syndrome arises when a stenosis of the subclavian artery results in reduced antegrade or retrograde flow in an internal mammary artery with resultant coronary ischemia.……     

Safety and efficacy of anti-EGFR monoclonal antibody (SCT200) as second-line therapy in advanced esophageal squamous cell carcinoma

Objective: The mainstay treatment of esophageal squamous cell carcinoma(ESCC) involves chemotherapy and immunotherapy. However, alternative therapies are required for patients who are refractory or intolerant to existing therapies.Methods: In this single-arm, multicenter, open-label phase Ib study, 30 patients received an intravenous infusion of SCT200, an antiepidermal growth factor receptor(EGFR) monoclonal antibody, 6.0 mg/kg once a week for 6 weeks, followed by 8.0 mg/kg once every 2 weeks u...     

中药超微粉碎后对其性能的影响研究

本文详细地阐述超微粉碎技术的特点，中药超微粉碎后对生物体吸收、药物用量、药物工业加工和提取等方面的影响，以及中药超微粉碎存在的问题，最后阐明了中药超微粉碎的广阔前景。     

UPLC法测定生、制白术配伍枳术丸中10种成分

目的建立UPLC法测定生、制白术配伍枳术丸中橙皮苷、柚皮苷、芸香柚皮苷、柚皮素、橙皮素、辛弗林、荷叶碱、白术内酯Ⅱ、白术内酯Ⅰ、白术内酯Ⅲ中的含有量。方法枳术丸甲醇提取物的分析采用ACQUITY UPLC HSS T3色谱柱(2. 1 mm×100 mm,1. 8μm);流动相0. 1%甲酸-0. 1%甲酸乙腈,梯度洗脱;体积流量0. 4 m L/min;柱温30℃;283 nm波长下测定橙皮苷、柚皮苷、芸香柚皮苷、柚皮素、橙皮素、辛弗林、荷叶碱、白术内酯Ⅱ;220 nm波长下测定白术内酯Ⅰ、白术内酯Ⅲ。结果 10种成分在各自范围内线性关系良好(r>0. 999 0),平均加样回收率97. 5%~100. 6%,RSD 1. 89%~3. 16%。结论该方法准确稳定,重复性好,可用于枳术丸的质量控制。