Effect of Nitric Oxide and Th1/Th2 Cytokine Supplementation Over Ectopic Endometrial Tissue Growth in a Murine Model of Endometriosis

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Promoting a Th1 environment reduced ectopic endometrial implant size, while nitric oxide donors suppressed Th1/Th2 cytokines and promoted implant growth in mice.

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Using a murine model of endometriosis, the study autografted endometrial tissue into the peritoneum of female mice and assessed ectopic implant growth after intraperitoneal administration of Th1 or Th2 cytokines or the nitric oxide donor SNAP for 8 weeks, with implant weight/area measurements and plasma cytokine quantification. Implants were smaller in mice receiving IFN-γ plus IL-2 than in mice treated with IL-2, IL-4 plus IL-10, or saline, and implant size also differed across SNAP concentrations versus saline. Plasma IL-2, IFN-γ, and IL-4 levels decreased as SNAP concentration increased. The paper’s major limitation is that the ectopic growth outcomes are tied to injected immunomodulators in a specific animal model without direct translation to human immune dynamics. This paper is centrally about endometriosis — it tests nitric oxide and Th1/Th2 cytokine supplementation effects on ectopic endometrial tissue growth in a murine endometriosis model.

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Abstract

Using a murine model, we evaluated the growth of ectopic endometrial tissue in the presence of T helper 1 (Th1) or Th2 cytokines or a nitric oxide donor (S-nitroso-N-acetyl-penicillamine [SNAP]). Female mice were autografted with endometrial tissue in the peritoneum. Different combinations and concentrations of cytokines or SNAP were injected intraperitoneally for 8 weeks. Implants were recovered, measured, and weighed. Cytokines were determined in plasma. Implants (weight and area) were smaller in mice that received interferon γ plus interleukin 2 (IFN-γ + IL-2) compared to mice treated with IL-2, IL-4 + IL-10 or saline solution, and saline solution compared to different concentrations of SNAP. The IL-2, IFN-γ, and IL-4 concentrations in plasma decreased in accordance with the increase in SNAP concentrations compared to saline solution. The promotion of a Th1 milieu in the peritoneum reduced the weight and area of the implant. Different concentrations of SNAP suppressed Th1 and Th2 cytokines and enabled the growth of the implant in this murine model.
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Abstract

Using a murine model, we evaluated the growth of ectopic endometrial tissue in the presence of T helper 1 (Th1) or Th2 cytokines or a nitric oxide donor (S-nitroso-N-acetyl-penicillamine [SNAP]). Female mice were autografted with endometrial tissue in the peritoneum. Different combinations and concentrations of cytokines or SNAP were injected intraperitoneally for 8 weeks. Implants were recovered, measured, and weighed. Cytokines were determined in plasma. Implants (weight and area) were smaller in mice that received interferon γ plus interleukin 2 (IFN-γ + IL-2) compared to mice treated with IL-2, IL-4 + IL-10 or saline solution, and saline solution compared to different concentrations of SNAP. The IL-2, IFN-γ, and IL-4 concentrations in plasma decreased in accordance with the increase in SNAP concentrations compared to saline solution. The promotion of a Th1 milieu in the peritoneum reduced the weight and area of the implant. Different concentrations of SNAP suppressed Th1 and Th2 cytokines and enabled the growth of the implant in this murine model. Similar content being viewed by others

References

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Condition tags

endometriosis

MeSH descriptors

Cell Proliferation Cytokines Endometrium Nitric Oxide Nitric Oxide Donors S-Nitroso-N-Acetylpenicillamine Th1 Cells Th2 Cells Animals Cell Proliferation Cytokines Cytokines Cytokines Disease Models, Animal Dose-Response Relationship, Drug Endometrium Endometrium Endometrium Endometrium Endometrium

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