PMID- 36410115 OWN - NLM STAT- MEDLINE DCOM- 20221220 LR - 20221222 IS - 2352-3964 (Electronic) IS - 2352-3964 (Linking) VI - 86 DP - 2022 Dec TI - Comprehensive morphometric assessment of deltoid muscle development in children: A cross-sectional study. PG - 104367 LID - S2352-3964(22)00549-7 [pii] LID - 10.1016/j.ebiom.2022.104367 [doi] LID - 104367 AB - BACKGROUND: Normative values for different morphometric parameters of muscle fibres during paediatric development, i.e. from 0 to 18 years, are currently unavailable. They would be of major importance to accurately evaluate pathological changes and could be used as reference biomarkers for evaluating treatment response in clinical trials, or physiological adjustments in sports or ageing. METHODS: Data were derived from 482 images with a total of 33 094 fibres from 10 mum cross-sections of snap-frozen muscle from 83 deltoid muscle biopsies from patients, 0-18 years, without neuromuscular pathology stained with ATPase 9.4. Data was acquired and analysed with patented image analysis algorithms from "CARPACCIO.cloud". Several parameters were extracted or calculated, including cross-sectional area (CSA), fibre type, circularity, as well as the Minimum diameter of Feret (MinFeret). FINDINGS: This study illustrates changes in quantitative parameters for muscle morphology over the course of paediatric development and the pivotal changes occurring around puberty. Only fibre size parameters (MinFeret, CSA) are dependent on gender, and only after puberty. All other parameters vary in a similar manner for females and males. The proportion of type 1 fibres is essentially constant from birth to age 10, decreasing to approximately 40% by age 18. Circularity decreases with age, to plateau after age 10 for both fibre types. INTERPRETATION: Normative values and reference charts for muscle fibre types in this age range have been generated to allow comparison of data from patients in pathology laboratories working on neuromuscular diseases. FUNDING: BPI FRANCE, PULSALYS, Association de l'Institut de Myologie, French National Research Agency (ANR), LABEX CORTEX of Universite de Lyon. CI - Copyright (c) 2022 The Authors. Published by Elsevier B.V. All rights reserved. FAU - Evangelista, Teresinha AU - Evangelista T AD - AP-HP, H. Pitie-Salpetriere, Institut de Myologie, Unite de Morphologie Neuromusculaire, France; AP-HP, H. Pitie-Salpetriere, Centre de reference des maladies neuromusculaires Nord/Est/Ile de France, France; Sorbonne Universite, INSERM, Institut de Myologie, Centre de Recherche en Myologie, France. Electronic address: t.evangelista@institut-myologie.org. FAU - Kandji, Malick AU - Kandji M AD - CARPACCIO.cloud, Lyon, France. FAU - Lacene, Emmanuelle AU - Lacene E AD - AP-HP, H. Pitie-Salpetriere, Institut de Myologie, Unite de Morphologie Neuromusculaire, France. FAU - Chanut, Anais AU - Chanut A AD - AP-HP, H. Pitie-Salpetriere, Institut de Myologie, Unite de Morphologie Neuromusculaire, France. FAU - Bui, Mai Thao AU - Bui MT AD - AP-HP, H. Pitie-Salpetriere, Institut de Myologie, Unite de Morphologie Neuromusculaire, France. FAU - Marty, Rudy AU - Marty R AD - CARPACCIO.cloud, Lyon, France. FAU - Buffat, Laurent AU - Buffat L AD - AltraBio, Lyon, France. FAU - Knoblauch, Kenneth AU - Knoblauch K AD - Univ Lyon, Universite Claude Bernard Lyon 1, Inserm, Stem-cell & Brain Research Institute, Bron, France; National Centre for Optics, Vision and Eye Care, Faculty of Health and Social Sciences, University of South-Eastern Norway, Kongsberg, Norway. FAU - Rudkin, Brian B AU - Rudkin BB AD - CARPACCIO.cloud, Lyon, France; Univ Lyon, Universite Claude Bernard Lyon 1, Inserm, Stem-cell & Brain Research Institute, Bron, France; Shanghai Jiao Tong University Institute of Medical Genetics, Shanghai Children's Hospital, Shanghai, PR China. Electronic address: brian.rudkin@inserm.fr. FAU - Romero, Norma Beatriz AU - Romero NB AD - AP-HP, H. Pitie-Salpetriere, Institut de Myologie, Unite de Morphologie Neuromusculaire, France; AP-HP, H. Pitie-Salpetriere, Centre de reference des maladies neuromusculaires Nord/Est/Ile de France, France; Sorbonne Universite, INSERM, Institut de Myologie, Centre de Recherche en Myologie, France. LA - eng PT - Journal Article DEP - 20221118 PL - Netherlands TA - EBioMedicine JT - EBioMedicine JID - 101647039 SB - IM EIN - EBioMedicine. 2022 Dec 14;87:104400. PMID: 36525724 MH - Male MH - Female MH - Humans MH - Child MH - Adolescent MH - Cross-Sectional Studies MH - *Muscle Development MH - *Muscle Fibers, Skeletal MH - Biopsy MH - Aging MH - Muscle, Skeletal PMC - PMC9677083 OTO - NOTNLM OT - Automated analysis OT - Human OT - Morphometry OT - Normal skeletal muscle OT - Paediatric age COIS- Declaration of interests The authors have no conflicts of interests regarding this manuscript. BBR is an inventor on the patent describing the algorithms used in this study. EDAT- 2022/11/22 06:00 MHDA- 2022/12/21 06:00 PMCR- 2022/11/18 CRDT- 2022/11/21 18:18 PHST- 2022/04/27 00:00 [received] PHST- 2022/10/31 00:00 [revised] PHST- 2022/10/31 00:00 [accepted] PHST- 2022/11/22 06:00 [pubmed] PHST- 2022/12/21 06:00 [medline] PHST- 2022/11/21 18:18 [entrez] PHST- 2022/11/18 00:00 [pmc-release] AID - S2352-3964(22)00549-7 [pii] AID - 104367 [pii] AID - 10.1016/j.ebiom.2022.104367 [doi] PST - ppublish SO - EBioMedicine. 2022 Dec;86:104367. doi: 10.1016/j.ebiom.2022.104367. Epub 2022 Nov 18.