Fibrinogen, factor VII, antithrombin III, cholesterol and triglycerides in young men with myocardial infarction and in their sons

The concentrations of fibrinogen (Fb) and the activities of factor VII (F VIIC) and antithrombin III (AT III) both in men less than 55 years old with a history of myocardial infarction (MI) and with normolipemia (MI-NLP) or hyperlipoproteinemia (MI-HLP) and in their sons have been measured. A significantly higher levels of Fb were found in both MI groups. Significantly higher levels of F VIIC and AT III were found only in the MI-NLP group. No lipid or haemostatic disorders were noted in sons. Furthermore, a positive correlation between the level of F VIIC and triglycerides (TG) or total cholesterol (TCh) in the patients and sons was revealed. A positive correlation was found between: (a) Fb levels in MI-HLP patients and in their sons; (b) TG levels in MI-HLP patients and in their sons; and (c) AT III activity in MI patients and in their sons. Fibrinogen appears to be associated with ischemic heart disease more closely than factor VII, the latter being strongly linked with hypertriglyceridemia. Elevated activities of AT III may reflect the haemostatic response to the prothrombotic state in IHD on the one hand whereas they may contribute to the development of IHD on the other.     

IMPACTED RIGHT UPPER CENTRAL INCISOR AND TRANSPOSITION OF TWO OTHER ANTERIOR TEETH ON THE SAME SIDE (A Case Report)

A young boy presented with an uncommon finding of impaction of upper right central incisor and transposition of canine and lateral incisor on the same side. Esthetic management of his cosmetic problem which included fixed appliance therapy followed by light cure restorations is discussed.KEY WORDS: Impaction, Transposition     

Establishment of the culture technique of pulmonary vascular pericytes and its identification in rats

Summary In order to study the cellular origin of muscularization in non-muscular arterioles of the lung, the pulmonary vascular pericytes-culture was established. The terminal lung tissue of the rat was taken out and minced. Then 0.5 % of type IV collagenase solution was added for digestion and the microvascular segments were obtained by screening. The targeted cells were cultured by “selective conditioned media”. Under phase-contrast microscope, the cultured cells were large in size with ragged margin and numerous pseudopodia, which imparted tubule-like structure. There was no contact inhibition in growing cells, so multiple layers developed. When they were confluent, there were morphologically no “hillock and dale” growth pattern as in smooth muscle cells or “weave-like” pattern as in fibroblasts. The ultrastructure of cultured cells showed numerous digital processes, moderate amount of rough and smooth endoplasmic reticulum, rich Golgi’s apparatus, microfilaments, few lysosomes without myofilaments and dense bodies. Immunohistochemical staining revealed that the cultured pericytes had same kind of cellular skeletal protein, α-SM-actin, like smooth muscle cells. The cultured cells also exhibited positive reaction to CD₃₄ antigen and S-100 antigen, which were negative in smooth muscle cells and fibroblasts. The cell growth pattern, ultrastructure and immunological phenotype suggested that the cultured cells had characteristics of vascular pericytes. Pericytes are one of the components of microvascular cells, and the establishment ofin vitro culture technique of pericytes is of significance for further exploration of the muscularization of non-muscular arterioles in lung and the mechanism of structural remodeling of pulmonary vessels. This project was supported by the grant of National Nature Sciences Foundation of China (No. 39570289).     

温血心停跳液与冷晶体心停跳液对狗心率变异性的影响

为探讨体外循环（ＣＰＢ）导致心脏植物神经系统（ＣＡＳ）损伤的机理,了解温血心停跳液能否防止ＣＰＢ后心率变异性（ＨＲＶ）的降低,采用对照方法观察了温血心停跳液与冷晶体心停跳液对狗ＨＲＶ的影响。结果显示：ＣＰＢ后温血心停跳液组（ＷＢ组）和冷晶体心停跳液组（ＣＣ组）的全频谱（ＴＰ）、低频（ＬＦ）和高频（ＨＦ）均较术前明显降低（Ｐ＜０．０５）,而且ＣＣ组比ＷＢ组降低更明显（Ｐ＜０．０５）,但ＬＦ／ＨＦ在组内及组间均无明显变化（Ｐ＞０．０５）。ＣＰＢ后２４小时平均心率（ＭＨＲ）明显增加（Ｐ＜０．０５）,且ＣＣ组高于ＷＢ组（Ｐ＜０．０５）。本研究表明：采用温血心停跳液或冷晶体心停跳液的ＣＰＢ不会干扰ＣＡＳ平衡,但均能使ＨＲＶ降低,温血心停跳液不能防止ＨＲＶ损害。     

海通片的毒理学研究

①目的　对海通片进行安全性评价。②方法　应用小鼠急性毒性实验及大鼠的亚急性毒性实验测定ＬＤ５０ ．③结果　小鼠的ＬＤ５０为８ ０６４．００ｍ ｇ／ｋｇ 体质量,ＬＤ５０的９５％ 可信限为７ ４４１．３２～８ ７３３．９１ｍ ｇ／ｋｇ 体质量,大鼠能耐受ＬＤ５０１／２０的海通片,其中毒靶器官是肝脏。④结论　海通片为低毒药物,肝功能不良者应慎用。     

A new sesquiterpene lactone from Elephantopus mollis

A methanolic extract of the whole plant of Elephantopus mollis was found to contain lupeol, lupeol acetate, epifriedelinol, molephantin, and 2-de-ethoxy-2-methoxyphantomolin, as well as a new sesquiterpene lactone determined to be 2-de-ethoxy-2-hydroxyphantomolin.     

The role of pancreatic venous sampling in the localization of occult insulinomas

The palpation and enucleation of occult insulinomas (less than 15 mm) can be a difficult surgical problem even with good arteriographic localization. In the authors' limited experience, confirmation of arteriographic findings by pancreatic venous sampling provided little additional localizing information. However, if arteriography is negative or equivocal, venous sampling can indicate the segment of pancreas to be "blindly" resected if the adenoma is not palpable. Venous sampling may be misleading in polyendocrine syndromes because of the frequency of multiple adenomas and variable hormone production.     

DNA测序建立甘肃当归、大黄种子rRNA基因图谱的研究

目的：对甘肃地道性中药材当归、大黄种子中rRNA基因内转录间隔区进行碱基序列测定，以期建立从分子水平对中草药种子进行鉴定的一种新方法。方法：提取当归、大黄种子中核DNA，利用特异性引物对其rRNA基因内转录间隔区进行套式PCR扩增，并将扩增产物进行碱基序列测定。结果：经琼脂糖凝胶电泳证实：以上述方法可获得当归、大黄种子DNA中rRNA基因内转录间隔区PCR扩增产物；并经测序后得到了当归、大黄种子rRNA基因内转录间隔区的碱基序列，且具有明显的差异和可对比性。结论：不同植物性中药材种子rRNA基因内转录间隔区碱基序列可做为从分子水平进行鉴定的标记。     

新型β_2激动剂SPFF对豚鼠气道的扩张作用研究

目的考察SPFF对组胺和乙酰胆碱所致气管收缩的抑制作用。方法离体豚鼠气管条和豚鼠引喘试验。结果SPFF可完全抑制组胺所引起的气管收缩作用 ,但不能完全抑制乙酰胆碱所引起的气管收缩。SPFF灌胃给药时对由于组胺和乙酰胆碱混合喷雾所引起的豚鼠喘息具有显著的保护作用 ,其作用强于同剂量的沙丁胺醇。结论SPFF对豚鼠气管具有显著的扩张作用     

2-(4-氨基-3-氯-5-三氟甲基苯基)-2-(叔丁氨基)-乙醇盐酸盐对气道平滑肌的松弛作用

目的：研究2-(4-氨基-3-氯-5-三氟甲基苯基)-2-(叔丁氨基)-乙醇盐酸盐(SPFF)对豚鼠气道平滑肌的松弛作用。方法：以盐酸异丙肾上腺素为对照考察SPFF对离体豚鼠气管条的松弛作用，及对离体豚鼠左心房的正性变时作用，并使用离体气管条考察特异性β2受体阻滞剂ICI118551对SPFF的拮抗作用。以沙丁胺醇为对照考察SPFF下对豚鼠药物引喘的保护作用。通过放射配基竞争结合实验，测定了SPFF对肺组织β受体的特异结合。以蛋白竞争结合法考察了SPFF对肺内CAMP含量的升高作用。结果：SPFF对离体豚鼠气管条的松弛作用与异丙肾上腺素相当，且这一作用可被ICI 118551竞争性拮抗，而SPFF对离体豚鼠左心房的正性变时效应为异丙肾上腺素的60％，SPFF对β2受体的选择性是异丙肾上腺素的163倍。SPFF下对药物引起豚鼠喘息的保护作用比沙丁胺醇强约7倍，对肺内β受体的结合能力分别是异丙肾上腺素的4倍和沙丁胺醇的约200倍，而对肺组织内cAMP的升高作用约相当于同剂量沙丁胺醇的3倍。结论：SPFF是-种强效、高选择性的β2受体激动剂。