内源性光动力疗法抑制人结肠癌裸鼠种植瘤的实验研究

目的　探讨基于 5 氨基乙酰丙酸 (ALA)的光动力疗法 (PDT)对结肠癌的生长抑制作用。方法　建立人结肠癌SW 480细胞裸鼠种植瘤模型 ,经尾静脉注入ALA液 (2 5 0mg/kg体重 ) ,光敏化 3h后半导体激光仪垂直照射肿瘤 3 0min(能量密度 9J/cm2 ) ,照射后连续观察肿瘤体积 ,瘤体HE染色病理分析。结果　ALA PDT在治疗后早期产生明显的抑制肿瘤增殖作用 ,瘤体组织坏死 ,腺腔样结构解离破坏 ,延命率 40 .2 % ,体积抑瘤率达 64 .1% ,治疗后期 ,肿瘤体积仍会缓慢增长 ,但增长速度明显小于对照组。结论　SALA PDT治疗可明显抑制裸鼠结肠种植瘤生长 ,延长荷瘤裸鼠生存期 ,但仍不能完全抑制肿瘤生长。     

髋臼骨折的手术治疗

目的：探讨髋臼骨折的手术治疗效果和影响疗效因素。方法：对31例髋臼骨折患进行切开复位由固定治疗。结果：平均随访18个月(6～36月)，根据Matta评分标准优16例，良8例，一般4例，差3例。1例术后发生深部感染，1例术后18个月发生股骨头坏死。结论：髋臼骨折，特别是有移位的髋臼骨折应及时手术治疗。手术医师的经验、骨折类型、手术时机和入路会影响髋臼骨折的疗效。     

Molecular cytogenetic study of short arm aberrations in human D, G group chromosomes.

Six cases of Dp+/Gp+, 10 cases of D/G translocation, 1 case of supernumerary marker chromosome, and 1 case of Yqs were studied using molecular and cytogenetic techniques. The Ag-NOR frequencies of the Dp+ and Gp+ groups were found to be higher than those of normal controls, while their satellite association frequencies were lower. Autoradiographic silver grains were not significantly distributed along the p+ part of the marker chromosome as revealed by chromosomal in situ hybridization using an rRNA probe. This result differs from our previous report. It is suggested that there might be different mechanisms for the formation of p+ on acrocentric chromosomes. D/G translocation cases were found to have lost their NOR. A study of supernumerary marker chromosomes and Yqs cases suggested that the marker chromosome and Yqs exerted no phenotypic effect. The mechanism of their formation is discussed.     

Preoperative imaging of abnormal parathyroid glands in patients with hyperparathyroid disease using combination Tc-99m-pertechnetate and Tc-99m-sestamibi radionuclide scans.

OBJECTIVE: To evaluate the efficacy of combined Tc-99m-pertechnetate and Tc-99m-sestamibi radionuclide scanning for imaging abnormal parathyroid glands in hyperparathyroid disease in a prospective study. SUMMARY BACKGROUND DATA: Established methods to localize abnormal parathyroid glands lack accuracy for routine use. Tc-99m-sestamibi used in conjunction with iodine-123 has excellent potential for preoperative imaging in patients with hyperparathyroid disease. An alternative method for parathyroid imaging was studied using Tc-99m-pertechnetate and Tc-99m-sestamibi. METHODS: Thirty patients with hyperparathyroid disease had Tc-99m-pertechnetate and Tc-99m-sestamibi subtraction radionuclide scanning to visualize abnormal parathyroid glands before surgery. The patients had surgery and pathologic confirmation of all parathyroid glands. RESULTS: In 23 patients with primary hyperparathyroidism, 12 of 13 solitary adenomas were visualized. Six of nine patients with diffuse hyperplasia had bilateral uptake consistent with diffuse hyperplasia. Three of nine patients had negative scans. One patient previously operated on for diffuse hyperplasia had only one gland scanned. Seven patients with renal failure-associated hyperparathyroid disease were scanned: five had bilateral uptake of Tc-99m-sestamibi consistent with hyperplasia, and two who had been previously operated on had localization of remaining abnormal parathyroid glands. CONCLUSIONS: Tc-99m-pertechnetate combined with Tc-99m-sestamibi subtraction radionuclide scanning is less cumbersome to implement than iodine-123 combined with Tc-99m-sestamibi scanning. It has a high sensitivity for imaging solitary parathyroid adenomas or persistent solitary hyperplastic glands. However it does not have the resolution necessary to delineate all parathyroid glands in diffuse hyperplasia.     

胎儿耳廓弹性软骨及其组织的发生

用９周－３９周引产胎儿标本７２例，取右耳廓石蜡切片，ＨＥ和Ｗｅｉｔｅｒｔ弹性纤维染色，光镜观察其弹性软骨、弹性纤维、耳廓肌和结缔组织的发生。     

在体肺隔离高温灌注的实验研究

８条犬于左肺动脉及左房分别插入灌注管及引流管后阻断，使左肺隔离。肝素化预充液中加入超量阿霉素进行常温及高温（４１～４３℃）的灌注转流。监测肺水含量、肺顺应性、血气、肺动脉压、肺实质温度、鼻咽温、血液学等指标，并行病理检查。结果表明：单侧肺隔离高温灌注在手术方法与转流技术上是可行的；它提供的热源简便，温度理想。高温灌注化疗对肺组织有一定影响，但其程度可逆；临床应用是可行的。     

船舶噪声对豚鼠耳蜗微音电位响应曲线的影响

在排除电场干扰伪迹后，耳蜗微音电位响应曲线可以作为反映近全耳蜗电生理功能的一项测试指标。能方便而迅速地完成测试，结果可靠。船舶噪声暴露后，显示耳蜗损伤频带主要在３．１５～８ｋＨｚ范围。这与人噪声性听力损失的特征非常类似。     

年轻人冠状动脉壁平滑肌细胞的表型变化及其与巨噬细胞的关系——免疫组织化学研究

选用年轻人冠状动脉材料，免疫组织化学方法，观察了弥漫性内膜增厚、脂纹、动脉粥样硬化斑块中平滑肌细胞的免疫表型变化，并将这些变化同巨噬细胞进行了联系。结果表明，凡是有巨噬细胞浸润之处，不管何种病变，该处的平滑肌细胞便失去了相应抗体的反应性，但仍能被抗间叶细胞抗体所标记，提示平滑肌细胞已经发生表型转变。这一现象说明巨噬细胞在平滑肌细胞表型转变过程中起重要作用，有助于人们对动脉粥样硬化病变、冠脉成形术后再狭窄病变发生过程的认识。     

环境生物测试技术对沉积物的毒性评价研究

作者采用５种环境生物测试技术对化工沉积物的毒性进行了评价，结果表明化工沉积物对卤虫（海洋生物）、美丽猛水蚤（河口生物）、大型水蚤（淡水生物）及斑马鱼都有一定毒性，其中斑马鱼胚胎仔鱼对化工沉积物的毒性最敏感。作者指出５种环境生物测试技术都可以用来评价沉积物的毒性。