Sarcoidosis y compromiso renal reporte de un caso y revisión de la literatura científica

Se presenta el caso de una mujer de 30 años, que presentaba síntomas respiratorios y constitucionales de dos meses de evolución. Se documentó exudado linfocitario y proteinuria, y se descartó tuberculosis y neoplasia maligna. Se le practicó biopsia pleural y de ganglio linfático, que reportaron sarcoidosis. Se tomó biopsia renal por presencia de proteinuria con pruebas serológicas negativas, y se encontró glomerulonefritis membranosa secundaria. Se inició tratamiento con prednisolona.Caso94-106We describe the case of a 30 years old female with a two month history of respiratory symptoms and malaise. A lymphocytic pleural effusion and proteinuria were documented, tuberculosis and malignancy were ruled out. Biopsy of lymph nodes and pleura confirmed sarcoidosis. Due to non-nephrotic proteinuria with negative serology tests, kidney biopsy was performed, showing secondary membranous glomerulonephritis. Treatment with prednisolone was started

SARS-CoV-2/Renin–angiotensin system: Deciphering the clues for a couple with potentially harmful effects on skeletal muscle

Severe acute respiratory syndrome coronavirus (SARS-CoV-2) has produced significant health emergencies worldwide, resulting in the declaration by the World Health Organization of the coronavirus disease 2019 (COVID-19) pandemic. Acute respiratory syndrome seems to be the most common manifestation of COVID-19. A high proportion of patients require intensive care unit admission and mechanical ventilation (MV) to survive. It has been well established that angiotensin-converting enzyme type 2 (ACE2) is the primary cellular receptor for SARS-CoV-2. ACE2 belongs to the renin-angiotensin system (RAS), composed of several peptides, such as angiotensin II (Ang II) and angiotensin (1-7) (Ang-(1-7)). Both peptides regulate muscle mass and function. It has been described that SARS-CoV-2 infection, by direct and indirect mechanisms, affects a broad range of organ systems. In the skeletal muscle, through unbalanced RAS activity, SARS-CoV-2 could induce severe consequences such as loss of muscle mass, strength, and physical function, which will delay and interfere with the recovery process of patients with COVID-19. This article discusses the relationship between RAS, SARS-CoV-2, skeletal muscle, and the potentially harmful consequences for skeletal muscle in patients currently infected with and recovering from COVID-19.National Fund for Science and Technological Development FONDECYT 1200944 1201039 Millennium Institute on Immunology and Immunotherapy P09-016-F Basal Grant-CEDENNA from The National Research and Development Agency (ANID), Government of Chile AFB180001 Iniciativa Cientifica Milenio (ANID, Chile) Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT) CONICYT FONDECYT 120094