ABSTRACT
Organotin compounds are typical environmental contaminants and suspected endocrine-disrupting substances, which cause irreversible sexual abnormality in female mollusks, called "imposex". However, little is known about the capability of triorganotin compounds, such as tributyltin and triphenyltin, to cause disorders in the sexual development and reproductive functions of mammals, including humans and rodents. Moreover, these compounds can act as potential competitive inhibitors of aromatase enzyme and other steroidogenic enzymes, affecting the reproductive capacity of male and female mammals. In this review, we discuss the cellular, biochemical, and molecular mechanisms by which triorganotin compounds induce adverse effects in the mammalian reproductive function.
Subject(s)
Animals , Female , Humans , Male , Genitalia/drug effects , Mammals/physiology , Organotin Compounds/toxicity , Trialkyltin Compounds/toxicity , Aromatase/drug effects , Endocrine System/drug effects , Reproduction/drug effectsABSTRACT
To evaluate the effect of a non-steroidal aromatase inhibitor anastrazoIe on symptomatic uterine leiomyomata in premenopausal women. This was a prospective intervention study carried out at Kasr El-Aini hospital. 48 premenopausal women with symptomatic uterine leiomyomata were enrolled and treated with anastruzole 1mg daily for three cycles of 28 day each. The effect of treatment was evaluated on leiomyoma and uterine volumes, endometrial thickness, gonadotrophins, estradiol and hematocrite levels, menstrual pattern, severity of leiomyoma-related symptoms and adverse effects. The effects of leiomyoma location, size and age of participants on tumor volume changes were evaluated. 40 women with 52 Ieiomyomata finished the study. Anastrazole resulted in a mean 52% reduction of leiomyoma volume [173.7 to 83.3ml, p<0.00.], a 29% reduction in total uterine volumes [290.2 to 205. 1ml, p<0.001] and an increase of the hematocrite levels [34.3% to 38.1%, p<0.001] at the end of treatment. Leiomyoma location had no significant effect on volume decrease. Leiomyoma volume decreased in women aged older than 40 years [p<0.001], whereas no significant difference was found in women younger than 40. The size of large Ieiomyomata [greater than 50mm] decreased significantly [p<0.001], Less difference was observed in small leiomyomata [50mm or less] [p=0.01]. No difference were detected in hormonal status. Aromatase inhibitor, Anastrazol was useful in the management of symptomatic Leiomyoma without causing serious hypoestrogenic adverse effects. Further clinical trials are warranted regarding long-term administration