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Aberrant mitochondrial dynamics disrupts mitochondrial function and contributes to disease conditions. A targeted RNA interference screen for deubiquitinating enzymes (DUBs) affecting protein levels of multifunctional mitochondrial fusion protein Mitofusin (MFN) identified USP8 prominently influencing MFN levels. Genetic and pharmacological inhibition of USP8 normalized the elevated MFN protein levels observed in PINK1 and Parkin-deficient models. This correlated with improved mitochondrial function, locomotor performance and life span, and prevented dopaminergic neurons loss in PINK1 KO flies. We identified a novel target antagonizing pathologically elevated MFN levels, mitochondrial dysfunction, and dopaminergic neuron loss of a model of mitochondrial dysfunction.
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http://dx.doi.org/10.26508/lsa.201900392 | DOI Listing |
J Cell Biol
October 2025
Cell and Systems Biology Program, Hospital for Sick Children, Toronto, Canada.
Mitochondria continually undergo fission to maintain their network and health. Nascent fission sites are marked by the ER, which facilitates actin polymerization to drive calcium flux into the mitochondrion and constrict the inner mitochondrial membrane. Septins are a major eukaryotic cytoskeleton component that forms filaments that can both directly and indirectly modulate other cytoskeleton components, including actin.
View Article and Find Full Text PDFBrain
September 2025
Central European Institute of Technology Masaryk University (CEITEC MU), 625 00 Brno, Czech Republic.
Mutations in the human ADAR gene encoding adenosine deaminase acting on RNA 1 (ADAR1) cause Aicardi-Goutières syndrome 6 (AGS6); a severe auto-inflammatory encephalopathy with aberrant interferon (IFN) induction. AdarΔ2-13 null mutant mouse embryos lacking ADAR1 protein die with high levels of IFN-stimulated gene (ISG) transcripts. In Adar Mavs double mutants also lacking the Mitochondrial antiviral signaling (MAVS) adaptor, the aberrant IFN induction is prevented.
View Article and Find Full Text PDFACS Nano
September 2025
Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, Key Laboratory of Innovation and Transformation of Advanced Medical Devices of Ministry of Industry and Information Technology, National Medical Innovation Platform for Industry-Education Integration in Advanced Medical Dev
Hyperglycemia-induced oxidative stress and inflammation critically impair diabetic bone defect repair. Here, a radially oriented microchannel scaffold (D-GSH@QZ) was developed via a directional freezing technique integrated with photo-cross-linking strategies. The scaffold was fabricated from gelatin methacryloyl, silk fibroin methacryloyl, and nanohydroxyapatite (HAp) to mimic the natural bone matrix, while incorporating quercetin-loaded ZIF-8 nanoparticles (Qu@ZIF-8) for pathological microenvironment modulation.
View Article and Find Full Text PDFJ Genet
September 2025
College of Life Sciences, Nanjing Forestry University, Nanjing 210037, People's Republic of China.
The family Syngnathidae includes seahorses, sea dragons, and pipefishes. We sequenced the complete mitochondrial DNA (mtDNA) genome of the belly pipefish, Bleeker, 1849. The genome is 16,646-bp long, and includes the standard complement for bony fishes of 13 protein-coding genes, 22 tRNA genes, two rRNA genes, and a control region, in the same order and strand distribution as other syngnathids.
View Article and Find Full Text PDFJ Genet
September 2025
The Co-Innovation Center for Sustainable Forestry in Southern China, College of Life Sciences, Nanjing Forestry University, Nanjing 210037, People's Republic of China.
The complete mitogenome of the common Chinese whip scorpion, (Butler, 1872) was sequenced and compared with another Uropygid mitogenome of (Lucas, 1835). Structural divergences include the absence of one tRNA-Leu and strand inversions in four protein coding genes (PCGs). All PCGs showed K/K ratios-1, which indicates purifying selection, with COI (0.
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