Bio-modulated mice epithelial endometrial organoids by low-level laser therapy serves as an invitro model for endometrial regeneration

Endometrial regeneration is a dynamic process that is not well understood. The destruction of the endometrium with the formation of intrauterine adhesions is known as Asherman's syndrome. The lesions range from minor to severe adhesions and their impact on pregnancy is well documented. Operative hysteroscopy is the mainstay of diagnosis and treatment of intrauterine adhesions. Nevertheless, the recurrence rates remain high. It was recorded that low-level laser therapy in low doses has a stimulatory effect on different tissues while the high dose produces a suppressive effect. Organoid is a three-dimensional assembly that displays architectures and functionalities similar to in vivo organs that are being developed from human or animal stem cells or organ-specific progenitors through a self-organization process. Our prospective was to study the effect of Low-Level Laser Therapy (LLLT) on mouse epithelial endometrial organoids regarding cell proliferation and endometrial regeneration as a new modality of treatment. An in vitro clinical trial to generate mouse epithelial organoid model and testing LLLT using He:Ne 632.8 nm device on organoids proliferation, function, and their response to ovarian hormones was performed. Trying endometrial regeneration by culturing organoids with decellularized uterine matrix (DUM) and studying the LLLT effect on the regeneration process. LLLT produced a proliferative effect on the epithelial mouse organoids confirmed by Ki67 and PCNA IHC. The organoids could regenerate the epithelial layer of the endometrium in vitro on DUM and LLLT could help in this process. In conclusion, organoids whether control or bio-stimulated proved a new modality to regenerate the endometrium. (c) 2021 Society for Biology of Reproduction & the Institute of Animal Reproduction and Food Research of Polish Academy of Sciences in Olsztyn. Published by Elsevier B.V. All rights reserved.