Cold Plasma Generates a Localized Inflammatory Response and Promotes Muscle Repair

Author:

Smith Carly J.1ORCID,Watkins Amanda R.2,Lucas Abigail A.1,Moniodes Arianna J.1,Ritchie Conn3,Thompson Thomas P.3,Schaer Thomas P.2,Gilmore Brendan F.3,Hickok Noreen J.1,Freeman Theresa A.1ORCID

Affiliation:

1. Department of Orthopedic Surgery Research Thomas Jefferson University 1015 Walnut Street Suite 501 Philadelphia PA 19107 USA

2. New Bolton Center Department of Clinical Studies University of Pennsylvania School of Veterinary Medicine 382 West Street Road Kennett Square PA 19348 USA

3. School of Pharmacy Queen's University Belfast Belfast BT9 7BL UK

Abstract

AbstractThe FDA‐approved Renuvion cold plasma device is currently used for dermal skin tightening procedures and subdermal tightening after liposuction. Anecdotally, patients report improved tissue healing outcomes following treatment. The most likely explanation for this is plasma‐generated reactive species which are inflammatory but also activate cellular signaling pathways, stimulate antioxidant responses, and activate immune cells. In this study, we aimed to determine the immediate and long‐term molecular effects of a single plasma treatment on surgically injured muscle and the soft tissue envelope. We used RNA sequencing, histology, and immunohistochemistry to determine changes to the tissue following treatment. Neutrophils and mast cells rapidly mobilize 6 h after treatment in conjunction with an upregulated cellular antioxidant response. Additionally, genes identified by RNAseq indicate upregulated pro‐regenerative muscle‐tissue‐protective gene transcripts and downregulated apoptotic pathway transcripts in the muscle tissue 6 h after treatment. The histology and RNAseq results from 4‐ and 14‐days post plasma treatment indicate that these early inflammatory and antioxidant events drive muscle regeneration to skew toward myogenic differentiation over adipogenesis. Thus, we conclude that a single plasma treatment results in an immediate inflammatory and antioxidant response that enhances long‐term muscle fiber repair through reduced adipogenesis.

Funder

National Institute of Arthritis and Musculoskeletal and Skin Diseases

Jefferson Foundation

Publisher

Wiley

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