The current research aimed to assess the impacts of Minocycline on varicoceleinduced regulation of apoptotic-related genes and oxidative stress in the testis of adult Wistar rats. Thirty-two rats were divided into 4 groups: sham, varicocele (VcI), varicocele treated with Minocycline (VcI + Mno) for 56 days and healthy rats treated with minocycline (Mno). After 8 weeks, the oxidative stress markers levels in serum were investigated, afterwards, the level of Bax and Bcl-2 expression were assessed through 'immunocytochemistry' and RT-qPCR assays. Also, the rate of apoptosis was evaluated through the TUNEL method. Johnson's score, 'the width of epithelium' and 'seminiferous tubules diameter' were ameliorated in the VcI + Mno group in comparison with the Vcl group. Administration of Minocycline raised the 'Glutathione peroxidase' and 'Superoxide dismutase' levels in serum and declined the Malondialdehyde level in serum (p = 0.001). Furthermore, current study represented that minocycline reduced Bax and enhanced the expression of Bcl-2 gene and protein in comparison with the Vcl group (p < 0.05). In addition, Minocycline administration significantly declined the rate of apoptosis in germ cells (p < 0.05). Our study demonstrated that the administration of Minocycline could improve testicular injury in varicocele-induced rats by its antioxidant activity.

The novel coronavirus (COVID-19) causes a severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) that has become a pandemic. In spite of several studies, the more time passes, the more symptoms are reported among COVID-19 patients. Surprisingly, numerous dermatological manifestations are also reported. This chapter focuses on the dermatological manifestations caused by COVID-19 infection. We overviewed and classified common and rare dermatological symptoms among COVID-19 patients and their pathophysiological mechanisms. We also discuss appropriate therapeutic management and attitudes, which may provide insights for dealing with similar cases in medical centers.

The aim of this study was evaluation of effect of heat shock protein 70 on toll-like receptor 4 and toll-like receptor 2 in melanoma cell line, A-375. The melanoma cell lines were stimulated in time course with heat shock protein 70 protein and incubation was performed. After 48 h, the cells were collected and total messenger ribonucleic acid was extracted and the expression of toll-like receptor 2 and toll-like receptor 4 was determined by quantitative reverse transcription polymerase chain reaction. The results showed that the appearance of toll-like receptor 2, toll-like receptor 4 in melanoma cell line, A-375 decreased in exposure to heat shock protein 70. The results showed the expression of nuclear factor kappa B in melanoma cell line. 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide evaluation results of melanoma cell death were compared at different times and statistical analysis showed a significant difference (p<0.001). The role of heat shock protein 70 has been identified as a tumor suppressor in melanoma cancer. Heat shock protein 70 is a new treatment for melanoma in the near future. Heat shock protein 70 can be considered as a potential target in gene therapy for patients with melanoma cancer and the advantages of gene therapy by heat shock protein 70 in this type of cancer over chemotherapy can reduce cytotoxic effects and its low invasiveness.

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Objectives: This study aimed to investigate the role of Eugenol in regulating the expression of FSH receptor (FSHR), human luteinizing hormone choriogonadotropin receptor (LHCGR), and estrogen receptor (ER) during follicular development in female rat ovarian torsion. Materials and Methods: In this experimental study, 48 female rats were randomly assigned to 4 groups, including G1 (i.e., sham), G2 (i.e., ovarian torsion/detorsion group), G3 (i.e., ovarian torsion/detorsion group treated with 30 mg/kg of eugenol), G4 (i.e., healthy group treated with 30 mg/kg of eugenol). After covering a treatment period of ten days, the ovarian tissue was collected for the histological analysis, the measurement of ER, FSHR, and LHCGR expression, as well as the assessment of testosterone, LH, FSH, and estrogen levels in blood serum. Results: Histological evaluation revealed the damage to ovarian tissue, the reduced oocyte, and the granulosa cell diameter in the torsion/detorsion group. However, the treatment with eugenol mitigated this damage. Eugenol administration increased the levels of estrogen, LH, and FSH, but it decreased the testosterone levels in the treated group. Moreover, the expression of ER, FSHR, and LHCGR was upregulated in the treated groups. Administration of eugenol was associated with an enhanced fertility. Conclusions: It was concluded that eugenol administration may have been effective in protecting the ovarian tissue from the damage caused by torsion/detorsion. Furthermore, eugenol was found to have the potential to modulate hormonal profiles and regulate the expression of ER, FSHR, and LHCGR, thereby contributing to an increased fertility.