柔嫩艾美耳球虫感染对雏鸡肾脏病理损伤的探讨

14日龄海兰褐雏鸡80只,分为对照组和感染组。感染组每只鸡口服接种8.0×104个柔嫩艾美耳球虫孢子化卵囊,分别于接种后第0,3,6,9,12天,每组随机取鸡5只,心脏采血,测定血清尿酸和肌酐含量,同时取感染后第6天鸡的肾脏,观察其病理组织学变化。结果表明:感染组鸡的血清尿酸含量于感染后第3,6,9天显著升高了267.41%(p<0.01),81.41%(p<0.01)和52.09%(p<0.05),肌酐含量在感染后第3,6天也显著增加了63.61%(p<0.05)和81.80%(p<0.05);肾脏的实质细胞呈轻度的颗粒变性或水泡变性。提示:球虫感染导致雏鸡肾脏病理损伤。     

草鱼肾脏吞噬细胞吞噬活性的研究

分离草鱼肾脏细胞,并检测其中吞噬细胞对福尔马林灭活的柱状嗜纤维菌和福建爱德华氏菌的吞噬活性与饲养水温,测试温度的关系,及其血清的调理作用。结果表明,草鱼肾脏细胞中有吞噬的主要是嗜中性白细胞和巨噬细胞,饲养低温虽然能抑制血清中凝集抗体的产生,但对肾脏细胞的吞活性影响不大。     

碘硒氟联用对小鼠肝肾脂褐素含量的影响

为研究碘、硒、氟联用对小鼠肝脏和肾脏脂褐素含量的影响,让小鼠饮用加氟、加碘和加硒的溶液10周后,采用生化方法测定其肾脏和肝脏组织内脂褐素含量的变化.结果表明,高氟能导致小鼠肝脏和肾脏内脂褐素含量显著上升(P<0.05);适当量的碘或碘硒联用可引起小鼠肝脏和肾脏脂褐素含量显著下降(P<0.05),而碘量过高则与氟产生协同毒性作用.结果提示,一定量的碘或碘硒联用可改善氟致肝脏和肾脏组织抗氧化能力的损伤.     

姜黄素对鼻咽癌细胞株CNE-2Z-H5裸鼠移植瘤增殖的影响

目的研究姜黄素对人低分化鼻咽癌细胞系亚克隆株CNE-2Z-H5裸鼠移植瘤生长和增殖的影响。方法复制人低分化鼻咽癌细胞系亚克隆株CNE-2Z-H5裸鼠移植瘤模型,观察姜黄素对移植瘤生长的影响。结果裸鼠体内实验显示姜黄素可以抑制移植瘤的生长。不同浓度姜黄素组移植瘤瘤重与溶剂对照组比较有降低趋势,高剂量组降低更明显,差异有极显著性(P<0.001),抑瘤率达59.75%。结论姜黄素可以抑制CNE-2Z-H5细胞裸鼠移植瘤的生长,其可能在鼻咽癌的治疗中具有一定的价值,值得进一步深入研究。     

胰岛素抵抗大鼠血糖正常阶段肾脏超微结构改变

为观察胰岛素抵抗(IR)大鼠血糖正常阶段的肾脏超微结构改变.以高糖高脂饲料(2H)和高糖高脂高盐(3H)饲料喂养2月龄SD大鼠4个月,复制IR模型,普通饲料喂养的SD大鼠为正常对照,透射和扫描电镜观察肾脏结构.对2H组用透射电镜下观察,肾小球和肾小管基底膜明显增厚,分别为(2.23±0.88)μm,(0.86±0.25)μm,P＜0.01,系膜区增宽,足突明显肿胀,部分融合,部分内皮窗孔消失,滤过屏障结构破坏.肾脏间质水肿,有炎细胞浸润;扫描电镜下观察,足突融合成片、变宽.3H组在透射电镜下观察,肾小球和肾小管基底膜明显增厚,分别为(1.88±0.41)μm,(0.96±0.22)μm,P＜0.01,足突明显肿胀,大部分融合,部分内皮窗孔消失,滤过屏障结构破坏严重.间质有炎细胞浸润,肾小管上皮细胞有大量脂滴沉积,肾间质可见浆细胞,部分区域髓样变性;扫描电镜下观察,肾小管刷状缘不整齐,微绒毛倒伏,管腔皱缩,局部细胞变性脱落,管壁空洞,足突大部分融合成片.结果表明高糖高脂和高糖高脂高盐膳食诱发的IR大鼠在血糖正常阶段已存在超微结构的病理改变.     

大鼠自发性乳腺间变型腺癌对抗肿瘤药物敏感性的研究

研究了大鼠自发性乳腺间变型腺癌对抗肿瘤药物的敏感性，应用五类抗肿瘤药物对大鼠自发性乳腺间变型腺癌进行了敏感性试验．结果表明，大鼠自发性乳腺间变型腺癌对植物类药物、抗代谢类药物、烷化剂类药物和抗菌素类药物敏感（Ｐ＜０．００１），揭示了大鼠自发性乳腺间变型腺癌对抗肿瘤药物的敏感性比较广泛，是一株对抗肿瘤药物有广谱敏感性的瘤株．而对激素类药物不敏感（Ｐ＞０．０５），提示大鼠自发性乳腺间变型腺癌属于非激素依赖性瘤株     

光对菜豆叶枕外植体脱落的影响

通过对生理生化指标的测定,研究了光对菜豆叶枕外植体脱落的影响,证明红光抑制脱落过程是通过抑制离区组织的衰老而实现的,远红光可以促进离区组织的衰老.     

Renal vascular reactivity to ATP in hyper- and hypothyroid rats

The effects of adenosine triphosphate (ATP) on the renal vasculature of isolated kidneys from control, hyper- and hypothyroid rats were characterized. ATP responsiveness was evaluated in basal tone and in raised tone (phenylephrine 10^–6 M) preparations. These responses were compared with those obtained with barium chloride or sodium nitroprusside (SNP), used respectively as nonreceptor agonists for vasoconstriction or vasodilation. In preparations at basal tone, ATP produced dose-related vasoconstriction, which was increased in hyperthyroid kidneys, and was severely attenuated in kidneys from hypothyroid rats. In raised tone preparations from control rats ATP produced a dual response: vasoconstriction at low doses, which declined with increasing doses to give way to vasodilator responses; biphasic responses were found in some kidneys. Hyperthroid kidneys showed increased pressor responses and a vasodilator response similar to those seen in kidneys from control rats. However, in hypothyroid kidneys the vasodilator response was abolished. The responses to barium chloride and to SNP were significantly increased and decreased in hyper- and hypothyroid kidneys, respectively; vasoconstrictor responses to SNP were also found in hypothyroid kidneys. Hence the abnormal responses to ATP observed in both thyroid dysfunctions may be partially explained by unspecific alterations in the contractile machinery of the renal vasculature in these kidneys. However, ATP responsiveness (vasoconstriction at low tone and vasodilation at raised tone) was more severely affected in hypothyroid kidneys, suggesting that purinergic (P_2X and P_2Y) receptor activity may be decreased in these organs.     

Induction of the synthesis of thymidine kinase by aldosterone in the kidney of the immature male rat

Summary Thymidine kinase activity was studied in kidneys from immature male rats after administration of aldosterone. Kinetic studies showed that the enzyme activity reached its maximum level 24 h after aldosterone injection. That increase was specific for aldosterone and could be related to the synthesis of new molecules of enzyme.     

纤维素-DMSO-PF浓溶液的粘弹性及其膜的研制和应用

把纤维素直接溶于二甲基亚砜(DMSO)和多聚甲醛(PF)中,能制成可纺性良好的纤维素浓溶液。测定其流变性能,首次直接得到纤维素浓溶液的粘流活化能等物理参数。以往这些物理参数都是间接地从纤维素酯、醚类的浓溶液获得,其准确性受酯、醚化条件的限制。我们研究了热力学和动力学条件与原液可纺性之间关系,获得最佳可纺性原液的热力学和动力学参数。在此基础上探讨了纤维素中空纤维膜的成形理论和成形工艺,首先用有机溶剂法纺制出纤维素中空纤维膜。调节原液条件和成形工艺参数,可在一定范围内调整中空纤维膜的透析能力。用溶剂法纤维素中空纤维膜组装成的人工肾透析器,具有良好的透析能力,能把血液中的低分子部分如尿素、肌肝等排出体外,而有用物质如B_(12)等则大部分保留,高分子部分如蛋白质、血球等则安全保留在血液中。经医院测定可在临床上进行应用。