Formation of I+III supercomplex rescues respiratory chain defects.

Mitochondrial electron transport chain (ETC) complexes partition between free complexes and quaternary assemblies known as supercomplexes (SCs). However, the physiological requirement for SCs and the mechanisms regulating their formation remain controversial. Here, we show that genetic perturbations in mammalian ETC complex III (CIII) biogenesis stimulate the formation of a specialized extra-large SC (SC-XL) with a structure of I+III, resolved at 3.

Hypertension and obesity independently drive hypertrophy and alter mitochondrial metabolism in a mouse model of heart failure with preserved ejection fraction.

Heart failure with preserved ejection fraction (HFpEF) has recently emerged as an insidiously and increasingly prevalent heart failure phenotype. HFpEF often occurs in the context of hypertension and obesity and presents with diastolic dysfunction, ventricular hypertrophy, and myocardial fibrosis. Despite growing study of HFpEF, the causal links between early metabolic changes, bioenergetic perturbations, and cardiac structural remodeling remain unclear.

STIL Overexpression Is Associated with Chromosomal Numerical Abnormalities in Non-Small-Cell Lung Carcinoma Through Centrosome Amplification.

STIL is a regulatory protein essential for centriole biogenesis, and its dysregulation has been implicated in various diseases, including malignancies. However, its role in non-small-cell lung carcinoma (NSCLC) remains unclear. In this study, we examined STIL expression and its potential association with chromosomal numerical abnormalities (CNAs) in NSCLC using The Cancer Genome Atlas (TCGA) dataset, immunohistochemical analysis, and in vitro experiments with NSCLC cell lines designed to overexpress STIL.

Mediastinal Extralobar Pulmonary Sequestration Concurrent With Spontaneous Pneumothorax: A Case Report of Difficult Preoperative Diagnosis.

Extralobar pulmonary sequestration (EPS) in the mediastinum is rare, and preoperative diagnosis can be challenging. We report a case of EPS in the middle mediastinum, where a congenital pericardial defect became apparent on computed tomography (CT) imaging as pneumopericardium concurrent with spontaneous pneumothorax. The patient presented with a left spontaneous pneumothorax.