Targeting competitive Fe–S regulation to treat Friedreich’s ataxia

Campos J, Ferreira J. Targeting competitive Fe–S regulation to treat Friedreich’s ataxia. Trends in Pharmacological Sciences, 2026; 0 DOI: 10.1016/j.tips.2026.04.010

Recent discoveries reveal that frataxin (FXN) and ferredoxin 2 (FDX2) competitively regulate mitochondrial iron–sulfur (Fe–S) cluster biosynthesis through their binding to the cysteine desulfurase NFS1 and the iron-sulfur cluster scaffold protein ISCU2 complex. Here, we discuss the potential of rationally designed peptide inhibitors targeting the FDX2–NFS1 interaction as a strategy to mitigate FXN deficiency and restore Fe–S cluster biosynthesis.

A phosphorylated variant of the mast/stem cell growth factor receptor KIT is upregulated in dorsal root ganglia of Friedreich ataxia

Koeppen AH, Mazurkiewicz JE, Feustel PJ, Pelech S, Sutter C, Fu Q, Lin Q. A phosphorylated variant of the mast/stem cell growth factor receptor KIT is upregulated in dorsal root ganglia of Friedreich ataxia. Histol Histopathol. 2026 May 20:25093. doi: 10.14670/HH-25-093. Epub ahead of print. PMID: 42158966. 

Friedreich ataxia (FA) causes hypoplasia of nerve cells in dorsal root ganglia (DRG). Beyond hypoplasia, however, the lesion in DRG includes disorganization and proliferation of satellite cells, formation of residual nodules, and neuronophagia. 

KIT is a proto-oncogenic protein with prominent roles in hematopoiesis including mast cell proliferation. In conclusion, proteomic analysis confirms the prominent participation of a new truncated KIT in satellite cells in the pathogenesis of FA in DRG.

Psychological resilience in patients with Friedreich ataxia: a 6-year longitudinal analysis

Ruth Eumann, Janna Krahe, Imis Dogan, Ana Sofia Costa, Jörg B Schulz, Stella A Lischewski, Kathrin Reetz; FACROSS Study Group. Psychological resilience in patients with Friedreich ataxia: a 6-year longitudinal analysis. Neurol Res Pract. 2026 May 19;8(1):40. doi: 10.1186/s42466-026-00499-z. PubMed ID: 42157313 

 Individuals with Friedreich ataxia display reduced resilience compared to healthy controls, which is associated with greater levels of depression and anxiety. Resilience remained stable over the disease course but appeared to decline during the COVID-19 pandemic, underlining the importance of strengthening resilience and mental well-being in this population.