Effects of amifostine on endometriosis, comparison with N-acetyl cysteine, and leuprolide as a new treatment alternative: a randomized controlled trial

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Amifostine, N-acetyl cysteine, and leuprolide acetate reduced endometriosis implant size and TNF-alpha levels in rats, with NAC showing the greatest reduction.

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This prospective randomized animal study evaluated the effects of amifostine, N-acetyl cysteine (NAC), and leuprolide on regression of endometriosis in 40 rats, using autologous endometrial tissue fragments transplanted to the abdominal wall and assessed after 3 weeks. After confirming implant growth, animals received amifostine, NAC, leuprolide, or no treatment, and investigators measured implant areas morphologically, serum and peritoneal TNF-alpha levels, and performed transmission electron microscopy of peritoneal samples and ovaries. All three drug groups showed significant decreases in mean implant areas and TNF-alpha, with greater TNF-alpha/area reductions in the NAC group and leuprolide appearing to best preserve peritoneal ultrastructure. The authors note the mechanism of regression was “yet unsettled,” and the work is limited to an experimental rat model. This paper is centrally about endometriosis — it is a randomized controlled trial comparing amifostine, NAC, and leuprolide for regression of endometriotic implants in rats.

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Abstract

PurposeTo assess the effects of amifostine, N-acetyl cysteine (NAC), and leuprolide as a scavenger in a rat endometriosis model.MethodsThis is a prospective randomized animal study. Setting The Animal Laboratory of Medical University. Animals 40 rats were used for transplantation of an autologous fragment of endometrial tissue onto the inner surface of the abdominal wall. After allowing 3 weeks for growth, laparotomies were performed to check the implants. Then animals were randomized into four groups: Group I amifostine (200 mg/day loading dose after 20 mg/kg/day, p.o.); Group II NAC (200 mg/day, p.o.); Group III leuprolide acetate 1 mg/kg single dose, sc; and Group IV (controls) no medication. Three weeks later, implants were evaluated morphologically. Serum and peritoneal TNF-alpha levels were evaluated. The transmission electron microscopic examination of the peritoneal samples and ovaries was also performed.ResultsLeuprolide acetate, amifostine and NAC caused significant decreases in the mean implant areas and significant decreases in serum and peritoneal TNF-alpha levels. On comparing all groups, these reductions were higher in Group II. According to the transmission electron microscopic findings, leuprolide seems to be protecting normal structure of peritoneum best when compared to the other groups.ConclusionsAmifostine, NAC and leuprolide caused regression of endometriosis in this experimental rat model by a yet unsettled mechanism.
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Abstract

Purpose To assess the effects of amifostine, N-acetyl cysteine (NAC), and leuprolide as a scavenger in a rat endometriosis model.

Methods

This is a prospective randomized animal study. Setting The Animal Laboratory of Medical University. Animals 40 rats were used for transplantation of an autologous fragment of endometrial tissue onto the inner surface of the abdominal wall. After allowing 3 weeks for growth, laparotomies were performed to check the implants. Then animals were randomized into four groups: Group I amifostine (200 mg/day loading dose after 20 mg/kg/day, p.o.); Group II NAC (200 mg/day, p.o.); Group III leuprolide acetate 1 mg/kg single dose, sc; and Group IV (controls) no medication. Three weeks later, implants were evaluated morphologically. Serum and peritoneal TNF-alpha levels were evaluated. The transmission electron microscopic examination of the peritoneal samples and ovaries was also performed.

Results

Leuprolide acetate, amifostine and NAC caused significant decreases in the mean implant areas and significant decreases in serum and peritoneal TNF-alpha levels. On comparing all groups, these reductions were higher in Group II. According to the transmission electron microscopic findings, leuprolide seems to be protecting normal structure of peritoneum best when compared to the other groups.

Conclusions

Amifostine, NAC and leuprolide caused regression of endometriosis in this experimental rat model by a yet unsettled mechanism. Similar content being viewed by others

References

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Arch Gynecol Obstet 289, 193–200 (2014). https://doi.org/10.1007/s00404-013-2963-0 Received: Accepted: Published: Issue date: DOI: https://doi.org/10.1007/s00404-013-2963-0

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Condition tags

endometriosis

MeSH descriptors

Acetylcysteine Amifostine Endometriosis Leuprolide Peritoneal Diseases Peritoneum Abdominal Wall Acetylcysteine Amifostine Animals Disease Models, Animal Endometriosis Endometrium Endometrium Female Leuprolide Peritoneal Diseases Peritoneum Random Allocation Rats

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