Inhibition of β‐amyloid toxicity by short peptides containing N‐methyl amino acids

Abstract: Single N‐methyl amino acid‐containing peptides related to the central hydrophobic region β_16–20 (Lys‐Leu‐Val‐Phe‐Phe) of the β‐amyloid protein are able to reduce the cytotoxicity of natural β_1–42 in PC12 cell cultures. N‐methyl phenylalanine analogs yield statistically significant increments in cell viability (Student's t‐test < 0.01%) and are nontoxic in the same assay. These promising results indicate that these peptide molecules could be a starting point for the development of potential therapeutic compounds for the treatment of Alzheimer's disease.     

肝移植治疗晚期原发性肝癌

目的：总结肝脏移植治疗晚期肝癌的初步经验。方法：对2例晚期肝癌接受肝移植患者的临床资料作回顾性分析。结果：2例患者手术均获得成功，术后生活质量提高，1例术后15个月死于全身衰竭，另1例术后17个月死于脑转移。结论：肝脏移植术可以提高晚期肝癌患者的生活质量，并延长患者生存期。经典原位肝脏移植术可以作为晚期肝癌的治疗选择。     

医源性脾损伤28例诊治分析

目的 分析医源性脾损伤的原因及有关的治疗手段。方法 回顾分析28例脾损伤和有关文献报道的病例。结果 脾损伤与胃十二指肠溃疡、胃癌、食管癌、肝肿瘤手术等有关；心肺复苏和纤维结肠镜检查也可致脾损伤；自发性脾破裂可发生在白血病等疾病的发病过程中。结论 根据损伤原因及损伤分级不同，采取不同的治疗方式。可提高保脾手术成功率。     

肝细胞癌RNA,DNA定量测定及临床意义

应用流式细胞分析技术，对64例肝细胞癌（HCC）RNA、DNA含量进行定量分析，并对病人进行1～5年半的随访，结果表明：RNA指标和DNA指标对PHC的临床病理诊断符合率分别为93．7％和75．0％，RNA指标更敏感，双指标联合应用与临床病理诊断符合率为96.8％；DNA倍体与年龄、HCV感染密切相关（P＜0．05），与性别、AFP水平、HBsAg及瘤体大小无关；DI随组织学分级的增高而增加，RNA和DNA含量与预后密切相关。提示RNA、DNA含量可作为PHC诊断及判断预后的理想指标，RNA和DNA双指标同时应用优于任一单项指标。     

Primary Mitral Valve Sarcoma in Infancy

Primary cardiac sarcoma is a rare tumor, found especially in children, particularly in the left side of the heart. This report describes a rare case of primary mitral valve sarcoma in a 7-month-old male infant with hemiparesis and heart murmur who underwent mitral valve replacement because of excessive invasion of the mitral valve by the tumor. The patient remains well, free of recurrence and cerebral metastasis, and without adjuvant therapy 18 months after the operation.     

Epidermoid cyst in a wandering spleen

A wandering spleen and splenic cysts are uncommon conditions in children. A combination of both entities has only rarely been reported in the literature. Another case of this complex pathology in 12-year-old girl is presented. She was initially referred for evaluation of a large abdominal mass. Diagnostic studies raised the suspicion of a hematoma in an abnormally located spleen, but the definitive diagnosis was established at laparotomy. Successful surgical management consisted of total cystectomy and splenopexy. Accepted: 6 November 1997     

原发性肝癌患者血清中庚型肝炎病毒基因的检测

用逆转录－聚合酶链反应法（ＰＴ－ＰＣＲ）检测了６７例原发性肝癌（ＰＬＣ）患者血清中的庚型肝炎病毒（ＨＧＶ）ＲＮＡ，以ＰＣＲ－双脱氧末端终止法分析了ＰＣＲ产物的核苷酸序列。结果显示，ＨＧＶＲＮＡ的检出率为１９．４％（１３／６７），其在ＨＢｓＡｇ阳性组和ＨＢｓＡｇ／抗ＨＣＶ阴性组中的阳性率分别是１２．２％（６／４９）和５０％（７／１４）；５’非编码区（５’－ＮＣＲ）扩增片段的核苷酸序列与美国株ＧＢＶ－Ｃ的同源性为９１．７％，提示在我国ＰＬＣ患者中存在ＨＧＶ感染。     

Spontaneous Splenic Rupture in a Patient with Acute Lymphoblastic Leukemia of Burkitt Type

We describe a case of spontaneous splenic rupture occurred in a patient with acute lymphoblastic leukemia of Burkitt type before starting cytotoxic chemotherapy. Left hypochondrial pain radiating to the homolateral shoulder was the only clinical symptom. Emergency computed tomography showed splenic laceration and hemoperitoneum. The patient underwent immediate laparotomy with splenectomy and experienced an uneventful postoperative recovery. Eight days after surgery, chemotherapy could be administered and complete remission was achieved. Although spontaneous rupture of the spleen is rare in leukemia and related disorders, this diagnosis should be taken in account also when clinical symptoms are mild. Following immediate operative management, patients may completely recover and receive cytotoxic chemotherapy with substantial possibilities of achieving complete remission.     

脾脏原发性恶性肿瘤

报告原发性脾脏恶性肿瘤7例。临床以左上腹不适，左上腹肿块及体重下降、发热、贫血、白细胞减少及血小板减少为主要特点。病理以淋巴系统及血管源性恶性肿瘤多见。治疗以手术和化疗等手段为主。早期发现、早期手术对提高疗效是非常重要的。     

保尔佳对原发性肝癌患者sIL-2R、IL-6、TNFα的影响及促进肝癌细胞凋亡的初步研究

对２０例原发性肝癌患者（大剂量组１０例、小剂量组１０例）临床应用保尔佳１周，用ＥＬＩＳＡ法检测治疗组用药前后外周血及用药后门静脉血的ｓＩＬ－２Ｒ，ＩＬ－６，ＴＮＦα的水平变化及用末端转移酶标记法（ＴＵＮＥＬ法）检测治疗组肝癌细胞的凋亡情况，与未治疗组、正常对照组相比。结果表明，治疗组外周血ｓＩＬ－２Ｒ水平明显下降（大剂量组Ｐ＜０．０１、小剂量组Ｐ＜０．０５），ＩＬ－６水平明显上升（大剂量组Ｐ＜０．０１、小剂量组Ｐ＜０．０５），ＴＮＦα水平有所下降（大剂量组Ｐ＜０．０５、小剂量组Ｐ＞０．０５），治疗组门静脉血与外周血ｓＩＬ－２Ｒ、ＩＬ－６、ＴＮＦα两者间无明显差异（Ｐ＞０．０５）。ＴＵＮＥＬ法检测显示保尔佳能促进肝癌细胞的凋亡（Ｐ＜０．０１，大、小剂量组间Ｐ＞０．０５）。且保尔佳对肝癌患者的血常规、肝功能等无不良影响。保尔佳是一种具有增强机体免疫功能、促进肿瘤细胞凋亡且无明显毒副作用的新型抗癌药物。