The inhibitory effect of altered collagen II peptide on HLA-DRB1-restricted T-cell activation

It has been known that rheumatoid arthritis (RA)-associated antigenic peptides CII263-272 are coupled with human leucocyte antigen (HLA)-DRB1 and recognized by T-cell receptor (TCR), which in turn induced T-cell proliferation and pathogenesis of RA. Non-T-cell-stimulating type II collagen (CII) peptides might be generated by removing the amino acids responsible for TCR contact and keeping the HLA-DR-binding residues intact. In this study, a panel of altered CII peptides (APs) with consecutive or single substitutions of the TCR-contacting residues were synthesized. Through peptide binding and T-cell activation assays, we demonstrated that altered CII263-272 peptides with substitution of the TCR-contacting residues did not or barely induced T-cell activation; one of the best non-T-cell-stimulating peptide AP268-270 inhibited the binding of wild-type CII263-272 to HLA-DR1 and T-cell activation triggered by wild-type CII263-272 and HA306-318 in a dose-response manner. These data suggest that removal of the TCR-contacting residues of CII263-272 leads to HLA-DRB1 binding and low T-cell-stimulating peptides, which could potentially inhibit the T-cell response induced by HLA-DRB1-binding antigenic peptides.     

孕妇血清标记物在中孕筛查中的应用

目的 :通过对孕妇血清标记物甲胎蛋白 (AFP)和人绒毛膜促性腺激素 ( β -HCG )测定来筛选缺陷儿。 方法 :用放射免疫法对 6 2例孕 14～ 2 3周妊娠妇女上述标记物连测 3次 ,每次隔 12～ 14d ,以两次异常为高危个体。每例筛查者跟踪至胎儿出生后。结果 :在筛查中发现了 1例先天愚型和 1例无脑儿。结论 :上述两种血清标记物可以作为神经管缺陷和先天愚型筛查的一项常规方法     

《内经》非药物疗法的防病治病机理初探

非药物疗法是中医治疗学中的一个重要组成部分.<内经>中的非药物疗法,通过协调阴阳平衡、调和气血运行、调节神志活动、调整脏腑功能等作用,对防病治病、养生益寿有重要意义.     

国产羟苯磺酸钙的药效研究

实验证实羟苯磺酸钙能显著性降低兔血小板聚集比率、血小板粘附性、血浆与血清粘度。能增强微循环、使高分子右旋糖酐造成兔眼结膜微循环障碍的血液流态得到充分的改善。     

梨状窝癌局部扩展的病理学研究

目的 探讨梨状窝癌局部扩展的规律,为梨状窝癌的手术治疗提供病理学依据。方法 应用石蜡包埋大体标本连续切片的方法,对２６例梨状窝癌全喉及次全喉及次全喉切除的标本进行了观察。结果 位于梨状窝外侧壁的肿瘤（４例）主要向外侧咽侧壁扩展,位于梨状窝内侧壁的肿瘤（５例）容易向喉腔及对侧梨状窝扩展。累及整个梨状窝１７例。声门旁间隙及甲状软骨是最易受侵犯的喉结构,环状软骨受侵较少;会厌及会厌前间隙的侵犯未见超过中     

变应性鼻炎红细胞和淋巴细胞免疫粘附功能和2种细胞因子的检测

目的 探讨红、白细胞免疫功能及白细胞介素－４（ｉｎｔｅｒｌｅｕｋｉｎ－４,ＩＬ－４）和干扰素γ（ｉｎｔｅｒｆｅｒｏｎ－γ,ＩＦＮ－γ）在变应性鼻炎发病中所起的作用。方法 采用红细胞、淋巴细胞免疫吸附法和ＢＡＥＬＩＳＡ法对外周血单核细胞分泌的ＩＬ－４和ＩＦＮ－γ进行了测定。结果 ４３例常年性变应性鼻炎患者的红细胞、淋巴细胞免疫功能和ＩＦＮ－γ水平均低于健康对照组（分别为Ｐ〈０．０５和Ｐ〈０．０１）,而ＩＬ－４的表达高于对照组（Ｐ〈０．０１）;结论 提示红细胞、淋巴细胞免疫功能、ＩＬ－４和ＩＦＮ－γ的异常在变应性鼻炎的发生发展起重要作用。     

鼻腔、咽部非霍奇金氏淋巴瘤

目的 :探讨鼻腔、咽部非霍奇金氏淋巴瘤 ( NHL)的临床特征、诊断要点及误诊原因。方法 :对1 986年～ 1 996年住院的 2 4例鼻腔、咽部非霍奇金氏淋巴瘤的患者作一回顾性分析。结果 :2 4例临床表现差异较大 ,缺乏特征性的表现。首次诊断 NHL6例 ,其余 1 8例初诊时诊断 :慢性鼻炎 8例 ,恶性肉芽肿3例 ,鼻息肉 2例 ,鼻中隔粘膜肥厚 2例 ,扁桃体炎 2例 ,慢性咽炎 1例。 2 4例均经病理切片及免疫组化确诊。结论 :鼻腔、咽部非霍奇金氏淋巴瘤临床表现复杂 ,缺乏特征性 ,早期易误诊。提高临床医师对本病的认识 ,反复活检及免疫组化等方法有利于本病的确诊。     

快速免疫治疗常年性变应性鼻炎

目的：探讨快速免疫治疗常年性变应性鼻炎的新方法及疗效。方法：３２例快速免疫组５天半达到维持量,持续治疗一年后评定。３６例常规免疫对照组治疗２年后评定。结果：快速免疫组一年总有效率 ８４． ４％,常规免疫组 ２年总有效率 ８８． ９％,两组疗效无显著性差异（ Ｐ＞０． ０５）。结论：快速免疫疗法减少了注射次数和缩短了疗程,为治疗常年性变应性鼻炎行之有效的方法。     

100例真菌性鼻窦炎的病原菌分析

目的 :探讨引起真菌性鼻窦炎的致病真菌及与临床的关系 ,为临床医师提供诊断依据 ,指导治疗。方法 :对 10 0例真菌性鼻窦炎患者 ,通过行鼻内窥镜手术所取的窦腔内容物送病理诊断的同时 ,行标本直接涂片镜检 ,接种培养 ,菌种鉴定。结果 :直接镜检霉菌阳性 98例 ;接种培养霉菌阳性 37株 ,其中曲霉菌属 31株 ,包括烟曲霉 14株 ,黄曲霉 10株 ,构巢曲霉 3株 ,灰绿曲霉 1株 ,并发现 3株曲霉新种被分别命名为北京曲霉 ,齐祖同曲霉 ,王端礼曲霉。其它种霉菌有少根根霉 1株 ,尖端足分支菌 3株 ,波氏假性霉样真菌 1株 ,链格孢子菌 1株。结论 :真菌性鼻窦炎的致病真菌以曲霉菌属为主 ,其预后与致病菌种和感染类型有一定关系     

2型糖尿病及其血管并发症患者血清ACE活性的变化

This investigation was made with reference to the changes of serum angiotensin converting enzyme (SACE) activity in type 2 diabetes and its vascular complications. SACE activity was studied in 127 type 2 diabetic patients and 90 healthy persons by using a spectrophotometric assay. The results showed SACE activity was obviously higher in diabetic patients (459.51 +/- 175.85 U) than in healthy persons (321.14 +/- 121.27 U); SACE activity was significantly higher in type 2 diabetic patients with diabetic nephropathy (548.27 +/- 166.60 U) than in patients without diabetic nephropathy (383.2 +/- 139.00 U), but there was no difference between patients with microalbuminuria and macroalbuminuria; no statistical difference was detected in SACE activity between diabetic patients with diabetic retinopathy (465.64 +/- 178.93 U) and without retinopathy (449.07 +/- 170.04 U); SACE activity was not associated with the course of diabetes, blood pressure, blood lipid and blood glucose. These data suggest that raised SACE activity might only play a role in the initiation of type 2 diabetes and diabetic nephropathy, but not relate to the progress of diabetic nephropathy, the onset of diabetic retinopathy and hypertension.