Vitiligo improvement in a hepatitis C patient after treatment with PEG-interferon alpha-2a and ribavirin: a case report

Role of Amine Neurotransmitters and Their Receptors in Skin Pigmentation: Therapeutic Implication

Skin pigmentation can occur due to increased melanin, including melanocyte proliferation, melanin biosynthesis, or melanocyte migration. There are many factors that influence the melanin production process, but the role of neurotransmitters in this process is still unclear. We found that histamine and serotonin influence the different stages of melanogenesis and melanogenesis, which increase melanogenesis. Since then, several related papers have been published, and from these papers, it has been recognised that the role of neurotransmitters in skin-pigment-related diseases needs to be summarised. By introducing the role of neurotransmitters in the regulation of various pigment disorders, including vitiligo and melasma, through this review, many researchers can be expected to try to apply neurotransmitter-related agonists and antagonists as treatments for skin pigment disorders.

Hepatitis C virus associated skin manifestations in upper Egypt: Before and after direct acting antiviral treatment

Egypt displays a high-hepatitis C virus (HCV) burden and almost 20% of the patients develop cutaneous manifestations HCV-related. Direct acting antivirals (DAAs) drastically changed HCV patient's morbidity and mortality but their impact of the cutaneous manifestations remains elusive. Our aim was to find out the prevalence of different dermatological manifestations accompaning HCV infection in Egyptian patients. Also, to highlight the impact of DAAs on such manifestations and any potential dermatological side effects. A descriptive study was carried out at the Department of Tropical medicine and Gastroenterology in collaboration with the Department of Dermatology, Venerology and Andrology, Assiut University Hospitals. Medical history, full general, dermatological examination and photography were performed for all patients before the start of treatment with the full regimen of DAAs, every month and 3 months after reaching sustained virological response (SVR), and the changes of skin lesions were recognized and rated by two blinded dermatologists. Out of 1000 examined patient, 36.9% had skin manifestation. Itching was the commonenst presented in 190 patients (51.5%). Three months after reaching SVR, skin examination revealed improvement in the majority of patients (23 764.22%). Pruritis had significant clinical improvement in 152(80%) of patients with significant change in the Visual Analog Score (P = .000). Also, patients with both cutaneous vasculitis and eczema experienced improvement in their skin manifestations. Skin manifestations are common in Egyptian patients with HCV infection. Pruritis is the commonest. The use of DAAs in treatment of HCV is associated with significant improvement of skin lesions with very limited cutaneous adverse effects.

Vitiligo at Injection Site of PEG-IFN-α 2a in Two Patients with Chronic Hepatitis C: Case Report and Literature Review

A 72-year-old female and a 57-year-old male with chronic hepatitis C were treated with a combination therapy of pegylated interferon (PEG-IFN)-α 2a (180 μg s.c. once a week) and ribavirin (1,000 mg orally daily). This resulted in the destruction of melanocytes at the injection site in both patients. In the male patient, the depigmentation progressed to the surrounding skin area. The dermatologist concurred with vitiligo as the diagnosis in both patients. Injection and surrounding site vitiligo associated with PEG-IFN-α 2b treatment for hepatitis C was noticed in previous case studies. For the first time, the case reports below highlight the same immunological adverse event secondary to PEG IFN-α 2a/ribavirin combination therapy and explain, in part, the complex interaction between host immune response and viral genotype. In addition, we systematically review drug-induced vitiligo and autoimmune diseases associated with the depigmentation disorder.