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W H Gispen F P Hamers C J Vecht F G Jennekens J P Neyt 《The Journal of steroid biochemistry and molecular biology》1992,43(1-3):179-183
The neurological toxicity seen in patients treated with cisplatin in most cases concerns ototoxicity and peripheral neuropathy. Thus far, the pathogenesis of cisplatin neuropathy remains obscure. Yet the fact that cisplatin affects mainly the sensory peripheral nerve fibers points towards an involvement of the dorsal root ganglia. In a rat model of cisplatin neuropathy, following a cumulative dose of approx. 12 mg/kg cisplatin the sensory nerve conduction velocity began to slow as compared to age-matched controls. Peptides derived from ACTH and MSH are known to exert neurotrophic effects. In vivo they facilitate postlesion repair mechanisms in the peripheral nervous system by enhancing the early sprouting response of the damaged nerve. Surprisingly, chronic treatment with a synthetic ACTH4-9 analog not only prevented cisplatin neurotoxicity following a low or high dose regimen, but also counteracted already existing cisplatin-induced neurotoxicity. Stimulated by these findings a randomized, double blind, placebo-controlled study was performed to assess the efficacy of the peptide in the prevention of cisplatin neuropathy in women suffering from ovarian cancer. The threshold of vibration perception (VPT) was used as the principal measure of neurotoxicity. Following 6 cycles of chemotherapy the VPT had increased more than 8-fold in women receiving placebo as co-medication. Whereas the VPT in women receiving 1 mg/m2 body surface ACTH4-9 analog before and after each cisplatin cycle only increased less than 2-fold. No side effects of the peptide treatment were observed and the clinical response to the chemotherapy was similar in all treatment groups. Collectively these preclinical and clinical data suggest that treatment based on non-endocrine fragments of ACTH/MSH may be a therapeutic option in the treatment of cisplatin neuropathy. 相似文献
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In the course of a freeze-cleave study on intercellular junctions in the regenerating rat liver, we observed an unusual array of intramembranous particles located in regions of contact between endothelial cells lining the hepatic sinusoids. These arrays were characterized by an accumulation of particles which resembled a zonula occludens in their linear deployment but differed in that the contact regions were composed of individual particles which remained separated from each other by regular particle-free intervals. 相似文献
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A rabbit with the allotypic phenotype: ala2a3 b4b5b6 总被引:26,自引:0,他引:26
A D Strosberg C Hamers-Casterman W Van der Loo R Hamers 《Journal of immunology (Baltimore, Md. : 1950)》1974,113(4):1313-1318
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