BACKGROUND: Renal cell carcinoma (RCC) is a disease typified by anomalies in cell metabolism. The function of mitochondria, including subunits of mitochondrial respiratory complex II (CII), in particular SDHB, are often affected. Here we investigated the state and function of CII in RCC patients. METHODS: We evaluated tumour tissue as well as the adjacent healthy kidney tissue of 78 patients with RCC of different histotypes, focusing on their mitochondrial function. As clear cell RCC (ccRCC) is by far the most frequent histotype of RCC, we focused on these patients, which were grouped based on the pathological WHO/ISUP grading system to low- and high-grade patients, indicative of prognosis. We also evaluated mitochondrial function in organoids derived from tumour tissue of 7 patients. RESULTS: ccRCC tumours were characterized by mutated von Hippel-Lindau gene and high expression of carbonic anhydrase IX. We found low levels of mitochondrial DNA, protein and function, together with CII function in ccRCC tumour tissue, but not in other RCC types and non-tumour tissues. Mitochondrial content increased in high-grade tumours, while the function of CII remained low. Tumour organoids from ccRCC patients recapitulated molecular characteristics of RCC tissue. CONCLUSIONS: Our findings suggest that the state of CII, epitomized by its assembly and SDHB levels, deteriorates with the progressive severity of ccRCC. These observations hold the potential for stratification of patients with worse prognosis and may guide the exploration of targeted therapeutic interventions.

• MeSH
• antigeny nádorové MeSH
• dospělí MeSH
• karboanhydrasa IX metabolismus   genetika   MeSH
• karcinom z renálních buněk * patologie   metabolismus   genetika   MeSH
• lidé středního věku MeSH
• lidé MeSH
• mitochondriální DNA genetika   metabolismus   MeSH
• mitochondrie * metabolismus   patologie   genetika   MeSH
• mutace MeSH
• nádorový supresorový protein VHL genetika   metabolismus   MeSH
• nádory ledvin * patologie   metabolismus   genetika   MeSH
• respirační komplex II * metabolismus   genetika   MeSH
• senioři MeSH
• sukcinátdehydrogenasa genetika   metabolismus   MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH