Nature Communications (Jun 2023)

A multicentric consortium study demonstrates that dimethylarginine dimethylaminohydrolase 2 is not a dimethylarginine dimethylaminohydrolase

  • Vinitha N. Ragavan,
  • Pramod C. Nair,
  • Natalia Jarzebska,
  • Ramcharan Singh Angom,
  • Luana Ruta,
  • Elisa Bianconi,
  • Silvia Grottelli,
  • Natalia D. Tararova,
  • Daniel Ryazanskiy,
  • Steven R. Lentz,
  • Sara Tommasi,
  • Jens Martens-Lobenhoffer,
  • Toshiko Suzuki-Yamamoto,
  • Masumi Kimoto,
  • Elena Rubets,
  • Sarah Chau,
  • Yingjie Chen,
  • Xinli Hu,
  • Nadine Bernhardt,
  • Peter M. Spieth,
  • Norbert Weiss,
  • Stefan R. Bornstein,
  • Debabrata Mukhopadhyay,
  • Stefanie M. Bode-Böger,
  • Renke Maas,
  • Ying Wang,
  • Antonio Macchiarulo,
  • Arduino A. Mangoni,
  • Barbara Cellini,
  • Roman N. Rodionov

DOI
https://doi.org/10.1038/s41467-023-38467-9
Journal volume & issue
Vol. 14, no. 1
pp. 1 – 16

Abstract

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Abstract Dimethylarginine dimethylaminohydrolase 1 (DDAH1) protects against cardiovascular disease by metabolising the risk factor asymmetric dimethylarginine (ADMA). However, the question whether the second DDAH isoform, DDAH2, directly metabolises ADMA has remained unanswered. Consequently, it is still unclear if DDAH2 may be a potential target for ADMA-lowering therapies or if drug development efforts should focus on DDAH2’s known physiological functions in mitochondrial fission, angiogenesis, vascular remodelling, insulin secretion, and immune responses. Here, an international consortium of research groups set out to address this question using in silico, in vitro, cell culture, and murine models. The findings uniformly demonstrate that DDAH2 is incapable of metabolising ADMA, thus resolving a 20-year controversy and providing a starting point for the investigation of alternative, ADMA-independent functions of DDAH2.