Development and Validation of a Multiparametric Semiquantitative Scoring System for the Histopathological Assessment of Ischaemia Severity in Skeletal Muscle

Sanz-Nogues, Clara, Creane, Michael, Hynes, Sean O, Chen, Xizhe, Lagonda, Christine Ayu, Goljanek-Whysall, Katarzyna ORCID: 0000-0001-8166-8800 and O'Brien, Timothy (2023) Development and Validation of a Multiparametric Semiquantitative Scoring System for the Histopathological Assessment of Ischaemia Severity in Skeletal Muscle. JOURNAL OF TISSUE ENGINEERING AND REGENERATIVE MEDICINE, 2023. pp. 1-15.

Access the full-text of this item by clicking on the Open Access link.

Official URL: http://dx.doi.org/10.1155/2023/5592455

Abstract

<jats:p>Skeletal muscle is one of the most abundant and dynamic tissues of the body, with a strong regenerative capacity. Muscle injuries can occur as a result of a variety of events, including tissue ischaemia. Lower limb ischaemia occurs when there is an insufficient nutrient and oxygen supply, often caused by stenosis of the arteries due to atherosclerosis. The aim of this study was to develop and validate a multiparametric scoring tool for assessing ischaemia severity in skeletal muscle in a commonly used preclinical animal model. Tissue ischaemia was surgically induced in mice by ligation and excision of the femoral artery. Calf muscles were carefully dissected, prepared for histological analysis, and scored for inflammation, fibrosis, necrosis, adipocyte infiltration, and muscle fibre degeneration/regeneration. Kendall’s coefficient of concordance (W) showed a very good agreement between the appraisers when scoring each individual histological feature: inflammation (W = 0.92, <jats:inline-formula> <math xmlns="http://www.w3.org/1998/Math/MathML" id="M1"> <mi>p</mi> <mo>≤</mo> <mn>0.001</mn> </math> </jats:inline-formula>), fibrosis (W = 0.94, <jats:inline-formula> <math xmlns="http://www.w3.org/1998/Math/MathML" id="M2"> <mi>p</mi> <mo>≤</mo> <mn>0.001</mn> </math> </jats:inline-formula>), necrosis (W = 0.77, <jats:inline-formula> <math xmlns="http://www.w3.org/1998/Math/MathML" id="M3"> <mi>p</mi> <mo>≤</mo> <mn>0.001</mn> </math> </jats:inline-formula>), adipocyte infiltration (W = 0.91, <jats:inline-formula> <math xmlns="http://www.w3.org/1998/Math/MathML" id="M4"> <mi>p</mi> <mo>≤</mo> <mn>0.001</mn> </math> </jats:inline-formula>), and fibre degeneration/regeneration (W = 0.86, <jats:inline-formula> <math xmlns="http://www.w3.org/1998/Math/MathML" id="M5"> <mi>p</mi> <mo>≤</mo> <mn>0.001</mn> </math> </jats:inline-formula>). Intrarater agreement was also excellent (W = 0.94 or more, <jats:inline-formula> <math xmlns="http://www.w3.org/1998/Math/MathML" id="M6"> <mi>p</mi> <mo>≤</mo> <mn>0.001</mn> </math> </jats:inline-formula>). There was a statistically significant negative association between the level of muscle ischaemia damage and the calf muscle weight and skeletal muscle fibre diameter. Here, we have developed and validated a new multiparametric, semiquantitative scoring system for assessing skeletal muscle damage due to ischaemia, with excellent inter- and intrarater reproducibility. This scoring system can be used for assessing treatment efficacy in preclinical models of hind limb ischaemia.</jats:p>

Item Type:	Article
Uncontrolled Keywords:	Bioengineering, Musculoskeletal
Divisions:	Faculty of Health and Life Sciences Faculty of Health and Life Sciences > Institute of Life Courses and Medical Sciences
Depositing User:	Symplectic Admin
Date Deposited:	17 May 2023 14:05
Last Modified:	17 Mar 2024 16:22
DOI:	10.1155/2023/5592455
Open Access URL:	https://doi.org/10.1155/2023/5592455
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3170446