Protective effects of vitamin E on ethane dimethane sulfonate-induced testicular toxicity in rats / 亚洲男科学杂志(英文版)

<p><b>AIM</b>To evaluate the protective/ameliorative effects of vitamin E (vit E) on ethane dimethane sulfonate (EDS)-induced testicular toxicity in rats.</p><p><b>METHODS</b>The rats were assigned to eight groups, seven rats in each, and were injected intraperitoneally with vehicle, a single dose of ethane dimethane sulfonate (EDS) (75 mg/kg bodyweight), vit E (100 mg/kg bodyweight) or EDS + vit E for 3? days. Thereafter, the rats were weighed, anaesthetized with ether and killed by cervical dislocation. The left testis weights were recorded and the relative testis weights were calculated. The left testes were processed for routine paraffin embedding. Three right testes from each group were taken randomly and then processed for routine electron microscopy. Tissue sections were examined using light and electron microscopy, and were scored for histopathological changes.</p><p><b>RESULTS</b>Vit E coadministration did not prevent the bodyweight loss on days 3 and 7. However, vit E administration prevented the EDS-induced testicular-weight loss in rats that received vit E for 3 days but not 7 days. The relative testis weight was higher on day 3 (instead of on day 7) than other groups. Nevertheless, the testis histology was not markedly protected by vit E in the EDS-treated rats. Detailed microscopic assessment showed few Leydig cells and abundant fibroblast-like cells indicating only some protection.</p><p><b>CONCLUSION</b>Vit E cotreatment showed partial protective effects on the testicular weight and testicular histology in rats that received EDS.</p>

Effects of intraarticular contrast media on synovial membrane and cartilage. An electron microscopic evaluation in rabbit knees

To evaluate the histological and ultrastructural alterations in rabbit knee joint cartilage and synovia induced by intraarticular injections of 2 water soluble contrast agents. The study was conducted at the Department of Orthopedics and Traumatology, Medical Faculty, Osmangazi University, Eskisehir, Turkey in January 2002. To examine the effect of contrast agents on articular cartilage and synovial membrane, rabbit model was used. Specimens from 62 knee joints were examined by light microscopy and transmission electron microscopy one hour, one day, one week and 2 weeks after intraarticular administration of gadolinium-diethylenetriamine pentaacetic acid, iopromide or saline. In the knees injected with saline, light microscopic changes of the synovium consisted of edema only. Edema and hyperemia were seen in contrast agent injected knees. Ultrastructurally, numerous and large pinocytotic vesicles in A cells of the synovial membrane were seen in contrast agent injected groups. In the knees injected with saline the cartilage were ultrastructurally normal but contrast agent injected knees showed increased activation of chondrocytes with increase of dense glycogen accumulation, large lipid vacuoles and matrix material. There were very rare pycnotic cells in these samples. The rating scale has been used and the means of the total scores were determined for the groups. The effects of contrast agents reduced gradually on the cartilage and synovium in general but did not become completely normal in the observation period