We conclude that LLLT can significantly decrease total numbers of mast cells during the proliferation and remodeling phases of healing in a rat model of third-degree burn.
Duchenne Muscular Dystrophy (DMD) is characterized by progressive muscle degeneration which outpaces regeneration, yielding fragile membranes with phospholipids high in 18:1 and low in 18:2n6. Central to the regenerative process are sphingolipids, specifically sphingosine‐1‐phosphate (S1P), which promote satellite cell proliferation and muscle regeneration. In mdx mice, a model of DMD, S1P is deficient. Thus the purpose of this study was to examine the impact of a dietary source of sphingolipids on muscle membrane phospholipid composition in mdx mouse. C57BL10 (WT) and mdx mice were fed either an AIN76A (CON) or AIN76A with 0.1% sphingomyelin (SM) diet for 7 wks starting at age 4 wks. Phospholipids were extracted and analyzed using thin layer‐gas chromatography. Diaphragm muscle from mdx demonstrated significantly higher percent mole fraction of monoenes (specifically 18:1) and lower polyenes (specifically 18:2n6) in the three major membrane phospholipid species (phosphatidylcholine, PC; phosphatidylethanolamine, PE; cardiolipin, CL) compared to WT. SM significantly increased both n3 (specifically PE 22:6n3) and n6 (specifically CL 18:2n6) polyenes and decreased monoenes (specifically CL 18:1) compared to CON. These results suggest that dietary sphingolipids influence membrane phospholipid composition. The project was funded by NSERC (PJL) and VBI/Fralin (VT) Seed Research Fund (RWG & EMS).
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