No abstract

PH is characterized by the occurrence of exclusive skin lesions in young women with a good response to corticosteroids but not to Dapsone. Reactivity mainly against Dsg1 suggests that PH in south Tunisia is a particular variant of nonendemic pemphigus foliaceus.

This study was carried out to evaluate spontaneous renal regeneration after stopping colistin methanesulfonate (CMS), which induces tubular damage, and the curative effect of Vitamin E (vit E) in rats. Animals were given the following: sterile saline (n = 6), 300,000 IU/kg/ day of CMS (n = 24), or 450,000 IU/kg/day of CMS (n = 24) for seven days. Each CMS group was subdivided into four subgroups (n = 6) and sacrificed as follows: (i) 12 h after stopping CMS, (ii) two weeks after stopping CMS, (iii) two weeks after stopping treatment with vit E, and (iv) two weeks after stopping treatment with olive oil. Subsequently, plasma creatinine (pCr), urine N-acetyl-b-D-glucosaminidase (NAG), renal tissue level of malondialdehyde (MDA), superoxide dismutase (SOD), glutathione reductase (GSH), and renal histology were tested. CMS-induced tubular damage increased the NAG and MDA levels and decreased the SOD and GSH activities. After two weeks of stopping CMS, there was no significant renal recovery. However, treatment with vit E improved tubular regeneration and reduced the biochemical impairments. Two weeks might not be long enough for significant spontaneous renal regeneration. Improvement of renal parameters by vit E could be explained by the reduction of oxidative stress damage.

This study was performed to investigate the protective effect of combined use of Vitamins E and C on colistin-induced tubular damage in rat. Animals were treated with sterile saline, colistin methanesulfonate (CMS), CMS + Vitamin E + Vitamin C, and Vitamin E + vitamin C, respectively, for seven days. Thereafter, animals were sacrificed and the urine N-acetyl-b-D-glucosaminidase (NAG) and gamma-glutamyl transferase (GGT) levels, plasma level of creatinine (Cr), vitamin E and vitamin C, and renal tissue levels of malondialdehyde (MDA), superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPx), as well as renal histology were performed. CMS induced acute tubular necrosis, increased the NAG, GGT, and MDA levels, and reduced the Vitamin E, Vitamin C, SOD, CAT, and GPx activities. Co-treatment with vitamins E and C restored all biochemical parameters cited above and improved the histopathological damage. Tubular damage induced by colistin is at least partly due to oxidative stress. Nephroprotective effect of Vitamins E and C is partially mediated through its antioxidant properties, and the higher protection by the combination of these vitamins is related to its synergistic effects.