The Clinical Ledger // 3-Min Read

Nature Genetics highlight: hotspot mutations in mitochondrial ribosomal RNA genes and cancer

Nature Genetics study showing that mitochondrial ribosomal RNA (mt-rRNA) genes carry functionally dominant hotspot mutations across multiple cancers. These mutations reshape mitochondrial translation and metabolism, activate oncogenic signaling, and help tumor cells adapt, proliferate, and resist therapy. Looking from this “mitochondrial ribosome” angle opens a new way to think about cancer metabolism and more personalized treatment strategies.

By John | View Credentials →

On 3 November 2025, Nature Genetics published online an open-access research article titled “Functionally dominant hotspot mutations of mitochondrial ribosomal RNA genes in cancer”. The study focuses on hotspot mutations in mitochondrial ribosomal RNA (mt-rRNA) genes in human cancers and reveals their functionally dominant roles in tumor initiation and progression.

Mitochondria generate ATP through oxidative phosphorylation (OXPHOS) and participate in metabolic reprogramming, oxidative stress, and apoptosis regulation. For a long time, mitochondrial dysfunction has been regarded as closely linked to cancer.

Key findings: the “functional dominance” of hotspot mutations

By large-scale analysis of cancer genome datasets, the authors identified high-frequency hotspot mutations in mt-rRNA genes across multiple tumor types, including colorectal, lung and breast cancer.

1. Selectivity and conservation

The hotspot sites are highly conserved and cluster within functional domains of mt-rRNA. This suggests these changes are not random events, but mutations that confer a survival advantage on tumor cells.

2. Regulation of mitochondrial translation

Functional experiments show that mt-rRNA hotspot mutations lead to abnormal translational efficiency, activating the mitochondrial unfolded protein response (mt-UPR).