PMID- 37291994 OWN - NLM STAT- MEDLINE DCOM- 20230721 LR - 20230721 IS - 1097-4598 (Electronic) IS - 0148-639X (Linking) VI - 68 IP - 2 DP - 2023 Aug TI - Urinary titin in myotonic dystrophy type 1. PG - 215-218 LID - 10.1002/mus.27917 [doi] AB - INTRODUCTION/AIMS: Urinary titin, an easy-to-obtain marker, has been investigated in muscular dystrophies, but not in myotonic dystrophy type 1 (DM1). We investigated the role of titin as a biomarker of muscle injury in DM1. METHODS: We compared the urinary titin N-fragment/creatinine ratio in 29 patients with DM1 vs. 30 healthy controls. We also recorded clinical data such as muscle strength, serum creatine kinase, DM1-related outcome measures, and the 20-item DM1-activ questionnaire. The severity of the disease was graded using the Muscular Impairment Rating Scale (MIRS). RESULTS: The titin/creatinine ratio was significantly higher in the urine samples of DM1 patients than of healthy controls (median +/- mean absolute deviation [MAD]: 39.313 +/- 26.546 vs. 6.768 +/- 5.245 pmol/mg creatinine; P < .001), and was related to muscle impairment graded by MIRS (tau = 0.503, P = .038). DISCUSSION: Urinary titin may be a biomarker for DM1. Long-term follow-up of DM1 patients is needed to investigate the potential role of titin as a biomarker for disease activity and progression. CI - (c) 2023 The Authors. Muscle & Nerve published by Wiley Periodicals LLC. FAU - Varga, David AU - Varga D AD - Department of Neurology, University of Pecs, Medical School, Pecs, Hungary. FAU - Perecz, Brigitta AU - Perecz B AD - Department of Neurology, University of Pecs, Medical School, Pecs, Hungary. FAU - Fulop, Krisztina AU - Fulop K AD - Department of Pathology, Neuropathology Unit, University of Pecs, Medical School, Pecs, Hungary. FAU - Sipos, Andrea AU - Sipos A AD - Department of Neurology, University of Pecs, Medical School, Pecs, Hungary. FAU - Janszky, Jozsef Vlagyimir AU - Janszky JV AD - Department of Neurology, University of Pecs, Medical School, Pecs, Hungary. FAU - Hajdu, Nandor AU - Hajdu N AD - Institute of Psychology, ELTE, Eotvos Lorand University, Budapest, Hungary. FAU - Pal, Endre AU - Pal E AUID- ORCID: 0000-0001-6525-0754 AD - Department of Neurology, University of Pecs, Medical School, Pecs, Hungary. AD - Department of Pathology, Neuropathology Unit, University of Pecs, Medical School, Pecs, Hungary. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20230608 PL - United States TA - Muscle Nerve JT - Muscle & nerve JID - 7803146 RN - 0 (Connectin) RN - AYI8EX34EU (Creatinine) RN - 0 (Biomarkers) SB - IM MH - Humans MH - *Myotonic Dystrophy MH - Connectin MH - Creatinine MH - Muscles MH - Biomarkers OTO - NOTNLM OT - muscle impairment rating scale OT - myotonic dystrophy type 1 OT - urinary titin EDAT- 2023/06/09 06:42 MHDA- 2023/07/21 06:43 CRDT- 2023/06/09 04:11 PHST- 2023/05/16 00:00 [revised] PHST- 2022/08/27 00:00 [received] PHST- 2023/05/20 00:00 [accepted] PHST- 2023/07/21 06:43 [medline] PHST- 2023/06/09 06:42 [pubmed] PHST- 2023/06/09 04:11 [entrez] AID - 10.1002/mus.27917 [doi] PST - ppublish SO - Muscle Nerve. 2023 Aug;68(2):215-218. doi: 10.1002/mus.27917. Epub 2023 Jun 8.