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Together, these findings suggest that relaxin is a naturally occurring inhibitor of collagen deposition during normal development, aging, and pregnancy and can be used to prevent the progression of fibrosis.MIAMI, FL, (GLOBE NEWSWIRE) - via NewMediaWire – Progressive Care Inc.
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Treatment of RLX-KO mice with recombinant human relaxin in early and developed stages of fibrosis caused the reversal of collagen deposition in the lung, heart, and kidneys. The increased fibrosis contributed to bronchiole epithelium thickening and alveolar congestion (lung), atrial hypertrophy and increased ventricular chamber stiffness (heart) in addition to glomerulosclerosis (kidney).
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From 6-9 months of age and onwards, all organs of RLX-KO mice, particularly male mice, underwent progressive increases in tissue weight and collagen content (all P <. In nonreproductive tissues, an age-related increase in interstitial collagen (fibrosis) was also detected in the lung, heart, and kidneys of RLX-KO mice and was associated with organ dysfunction. The testis, epididymis, and prostate of RLX-KO mice showed delayed tissue maturation and growth associated with increased collagen deposition. Analysis of male RLX-KO mice also demonstrated inadequate reproductive tract development. Later studies showed that these deficiencies were associated with increased collagen, primarily in the nipple and vagina. Pregnant RLX-KO mice underwent inadequate development of the pubic symphysis as well as the mammary glands and nipples compared to wild-type mice, thus preventing lactation. To improve our understanding of the physiologic role(s) of relaxin, the relaxin gene-knockout (RLX-KO) mouse was established by our group and subsequently phenotyped. Relaxin is well known for its actions on collagen remodeling.
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