1. Immunohistochemical phenotyping of T cells, granulocytes, and phagocytes in the muscle of cancer patients: association with radiologically defined muscle mass and gene expression
- Author
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Ana Anoveros-Barrera, Amritpal S. Bhullar, Cynthia Stretch, Abha R. Dunichand-Hoedl, Karen J. B. Martins, Aja Rieger, David Bigam, Todd McMullen, Oliver F. Bathe, Charles T. Putman, Catherine J. Field, Vickie E. Baracos, and Vera C. Mazurak
- Subjects
Muscle biopsy ,Muscle mass ,Muscle catabolism ,Computed tomography ,T cells ,CD8 T cells ,Diseases of the musculoskeletal system ,RC925-935 - Abstract
Abstract Background Inflammation is a recognized contributor to muscle wasting. Research in injury and myopathy suggests that interactions between the skeletal muscle and immune cells confer a pro-inflammatory environment that influences muscle loss through several mechanisms; however, this has not been explored in the cancer setting. This study investigated the local immune environment of the muscle by identifying the phenotype of immune cell populations in the muscle and their relationship to muscle mass in cancer patients. Methods Intraoperative muscle biopsies were collected from cancer patients (n = 30, 91% gastrointestinal malignancies). Muscle mass was assessed histologically (muscle fiber cross-sectional area, CSA; μm2) and radiologically (lumbar skeletal muscle index, SMI; cm2/m2 by computed tomography, CT). T cells (CD4 and CD8) and granulocytes/phagocytes (CD11b, CD14, and CD15) were assessed by immunohistochemistry. Microarray analysis was conducted in the muscle of a second cancer patient cohort. Results T cells (CD3+), granulocytes/phagocytes (CD11b+), and CD3−CD4+ cells were identified. Muscle fiber CSA (μm2) was positively correlated (Spearman’s r = > 0.45; p =
- Published
- 2019
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