Oral isotretinoin is the most effective treatment for moderate to severe acne and its side effects are mostly dose‐dependent. Low dose isotretinoin (0.5 mg/kg/day for 1 week every 4 weeks for 6‐months) could be effective and even in its end result, comparable with high or optimal doses. In this systematic review, we aimed to sum up the results of clinical trials regarding indications, dosage, prescription protocol, effectiveness, side effects, patient satisfaction, recurrence rate, and follow‐up period of low dose isotretinoin in treatment of acne. Cochrane, Google Scholar, Science Direct, PubMed, and Medline were searched. A total of 460 articles were searched electronically and 382 articles were excluded. About 4 were non‐English and 2, before 1980. The full text of 72 articles was reviewed. Finally 15 documents met the inclusion criteria for entering this systematic review. The standard dose of isotretinoin is 0.5‐1 mg/kg/day for 4 months with a total dose of 120‐140 mg/kg/day. Daily doses between 0.1 and 0.3 mg/kg can be recommended for more than 6 months due to the occurrence of fewer side effects and more economical concerns. For greater effectiveness, it could be combined with other medications.
Considering the different forms, alopecia could be a very common condition with particular therapeutic concerns; thus, recent therapies still require further assessments. Aim of this systematic review was to evaluate efficacy, safety, and therapeutic durability of platelet rich plasma (PRP) in treating various forms of alopecia. A total of 64 articles were found through a systematic search, and eight original articles were included in the study, based on inclusion/exclusion criteria. In most studies (62.5%) patients' conditions had improved by receiving PRP therapy; these cases experienced an increase in growth and thickness of hair. Simultaneous use of PRP and Minoxidil demonstrated the highest rate of improvement and satisfaction. The highest efficacy in patients with alopecia areata was 76% and the lowest efficacy was 31.7% and in patients with androgenetic alopecia the highest efficacy was 42.75% and the lowest reported efficacy was 25.55%. The main side effect was pain due to PRP injection, which disappeared after ending the treatment and only one article reported more serious side effects. Recurrence after treatment was also reported in only one article. PRP is a safe and easy method for treating hair loss and has limited adverse effects. Optimization of this method depends on dosage, number of sessions and their intervals, and injection techniques. According to the results, the use of PRP due to its relatively high efficiency, low and tolerable side effects, and low recurrence rate can be a good method for the treatment of alopecia and hair loss.
Keratin intermediate filaments play an important role in maintaining the integrity of the skin structure. Understanding the importance of this subject is possible with the investigation of keratin defects in epidermolysis bullosa simplex (EBS). Nowadays, in addition to clinical criteria, new molecular diagnostic methods, such as next generation sequencing, can help to distinguish the subgroups of EBS more precisely. Because the most important and most commonly occurring molecular defects in these patients are the defects of keratins 5 and14 (KRT5 and KRT14), comprehending the nature structure of these proteins and their involved processes can be very effective in understanding the pathophysiology of this disease and providing new and effective therapeutic platforms to treat it. Here, we summarized the various aspects of the presence of KRT5 and KRT14 in the epidermis, their relation to the incidence and severity of EBS phenotypes, and the processes with which these proteins can affect them.
The mucocutaneous manifestations of Corona Virus Disease 2019 (COVID‐19) logically may reflect systemic visceral involvements. These findings are visible and easy to approach like biopsies for exact histopathologic evaluations. This systematic review was conducted to collect the mucocutaneous histopathologic data of COVID‐19 patients for future investigations and interpretations. The COVID‐19 dermatology resource of the Centre of Evidence‐Based Dermatology (CEBD) at the University of Nottingham, PubMed, Scopus, Google Scholar and Medscape was searched for relevant English articles published by June 3, 2020. This review included 31 articles, involving 459 patients. The common primary virus‐related mucocutaneous manifestations are easy to approach in the course of COVID‐19. The authors of this study supposed dermatopathological findings as the predictors of the nature of potential systemic involvements and outcomes of COVID‐19. Scrutinizing these findings can help with adopting more effective therapeutic and management strategies; nevertheless, this review found the severity and time of onset of symptoms not to be associated with the laboratory and histopathological findings. Deterioration of clinical conditions and laboratory tests was also not related to the histopathological findings. It is recommended that meta‐analyses be conducted in the future to detail on these data for having more comprehensive and better conclusion.
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