轴型皮瓣移植在眼部成形术中的应用

目的研究颜面大片疤痕形成,全眼睑缺损整形修复的方法。方法应用前臂轴型皮瓣和颞浅动脉岛状皮瓣移植修复全眼睑缺损,眉毛、睫毛缺如及结膜囊成形术。结果两例典型病例均获得满意的矫治,安装了义眼,改善了外观。结论轴型皮瓣矫正颜面大片疤痕畸形和全眼睑缺损是一种很好的方法。     

人参茎叶中微量三萜化合物的化学研究

近年报告从五加科人参属植物人参(Panax ginseng C.A.Meyer)的地上茎及叶中分得多种成分。日本学者从人参叶中分得人参皂甙-Rb_1,-Rb_2,-Rc,-Rd,-Re,-Rg_1,-F_1,-F_2,-F_3~((1,2))我国学者徐绥绪和王志学等人从人参茎叶(辽宁桓仁)中分得人参皂甙-Rb_1,-Rb_2,-Rc,     

茜草中萘酸酯类成分的研究

从茜草根中分离出四个萘酸甲酯化合物。经光谱分析及化学方法鉴定,化合物Ⅰ为一新成分,命名为茜草内酯(rubilactone,Ⅰ),化合物Ⅱ～Ⅳ分别为已知物3’-甲氧羰基-4’-羟基-萘骈[1’,2’-2,3]呋喃(furomollugin,Ⅱ),二氢大叶茜草素(dihydromollugin,Ⅲ),2-(3’-羟基)异戊基-3-甲氧羰基-1,4-萘氢醌-1-O-β-D-吡喃葡萄糖甙(Ⅳ)。其中Ⅱ系自茜草属中首次分得。     

Vitamin B12-responsive neonatal megaloblastic anemia and homocystinuria with associated reduced methionine synthase activity

We present findings on an infant with neonatal megaloblastic anemia, homocystinuria, and neurologic dysfunction that included developmental delay and tonic seizures. There was no methylmalonic aciduria. Cyanocobalamin therapy was accompanied by complete hematologic and neurologic recovery, diminished homocystine excretion, and subsequently normal neurologic development. Cultured fibroblasts and lymphoblasts showed a reduced methionine synthase activity and a growth requirement for methionine. Cobalamin incorporation by the patient's lymphoblasts was normal, but the proportion of cellular methylcobalamin in the patient's lymphoblasts and fibroblasts were markedly reduced and that of adenosylcobalamin normal. The reduced methionine synthase activity was independent of assay reducing (thiol) conditions, but normal levels of activity accompanied culture of the patient's lymphoblasts in medium with markedly increased cobalamin concentration. The characteristics of the reduced methionine synthase of our patient differ significantly from that of the previously described infant with cobalamin E disease and suggest that genetic heterogeneity may characterize this mutation.     

Early amniocentesis for prenatal cytogenetic evaluation

Early amniocentesis at 11-14 weeks gestation was evaluated in 100 consecutive patients to see how this technique compares with later amniocentesis. There were no complications as a consequence of the procedure or related pregnancy losses of chromosomally normal fetuses. Samples obtained from three (3%) patients showed insufficient cell growth; two of these patients elected a repeat procedure, which yielded a normal karyotype in each case. There were five abnormal karyotypes, one of which was a culture artifact; in the latter case, repeat amniocentesis at 15 weeks yielded a normal result. Of the 95 pregnancies with normal karyotypes, 94 were progressing normally at follow-up, and one patient elected pregnancy termination because of maternal indications. It appears that early amniocentesis may be an attractive alternative to traditional amniocentesis, in that it provides results at an earlier gestational age and may avoid certain disadvantages of chorionic villus sampling.     

国产阿克拉霉素A的体内外抗肿瘤作用

国产阿克拉霉素A(aclacinomycin;ACM-A)能明显抑制体外培养小鼠白血病P₃₈₈和人体胃癌SGC-7901细胞的生长。在0.01 μg/ml浓度时能抑制65.4%的克隆形成,ED₅₀为0.0085μg/ml。ACM-A对白血病小鼠有显著治疗作用,延长小鼠生命时间143%,并有半数小鼠获得治疗。对Ehrlich腹水癌和肉瘤-180也有较强的抑制作用,对肉瘤-180的作用与adriamycin相似。ACM-A主要抑制³H-TDR和。H-UR分别参人人体胃癌细胞的DNA和RNA;大剂量时对蛋白质合成也有影响。P₃₈₈细胞实验中证明ACM-A对DNA合成的抑制程度与adriamycin相似,低于daunomycin。     

人参皂甙Rh_2体外对小鼠黑色素瘤细胞的分化诱导作用

体外实验证明人参皂甙Ｒｈ＿２在１０μｇ·ｍｌ￣（－１）的浓度下能明显抑制Ｂ＿（１６）细胞的生长，并呈浓度依赖性，其ＩＣ＿（５０）为４．１μｇ·ｍｌ￣（－１）。Ｒｈ＿２在１０μｇ·ｍｌ￣（－１）浓度下对Ｂ＿（１６）细胞有较强的分化诱导作用，表现为黑色素生成能力明显增加；形态向上皮样细胞分化；细胞呈网状结构；黑色素颗粒增多，生长变缓慢。细胞动力学研究结果表明，Ｒｈ＿２可使Ｂ＿（１６）细胞阻断在Ｇ＿１期。提示Ｒｈ＿２对Ｂ＿（１６）细胞具有分化诱导作用     

新型缩氨基硫脲衍生物——氨基巯三唑Schiff碱的合成与抗菌活性

设计合成了新型缩氨基硫脲衍生物4-氨基-3-(呋喃-2)-5-巯基-1,2,4-三唑及其十种不同醛的Schiff碱衍生物,并进行了抑菌实验。结果表明:Schiff碱化合物结构中的甲亚胺基是该类化合物的活性功能基。苯环上更换不同的取代基对其活性有一定的影响,其中化合物4-(5-硝基亚糠基氨基)-3-(呋喃-2)-5-巯基-1,2,4-三唑(Ik)抗菌活性最高且抗菌谱最广;化合物4-亚水杨基氨基-3-(呋喃-2)-5-巯基-1,2,4-三唑(Ib)具有较强的抑霉活性。