Low Dose of Genistein Alleviates Mono-(2-Ethylhexyl)‎ Phthalate-Induced Fetal Testis Disorder Based on Organ Culture Model

Abstract EN

Mono-(2-ethylhexyl) phthalate (MEHP) and genistein have been classified as endocrine-disrupting chemicals (EDCs) which interfere with the differentiation and development of the male reproductive system.

However, how these two EDCs would affect fetal rat testis development at a low dose was rarely studied.

In this study, we established the organ culture system and applied it to evaluate testicular effects following multiple EDC exposure at a low dose.

15.5 days postcoitum fetal rat testes were dissected, cultured, and exposed to vehicle (control), GEN (1 μmol/L, G), MEHP (1 μmol/L, M), or GEN (1 μmol/L)+MEHP (1 μmol/L, G+M).

Testicular cell markers, testosterone concentration, redox state, testicular histology, and testicular ultrastructure were evaluated.

Our results showed that a low dose of MEHP suppressed the development of Sertoli cells, Leydig cells, and gonocytes by triggering oxidative injuries, which was consistent with the ultrastructural findings.

However, coadministration of genistein at a low dose could partially attenuate MEHP-induced fetal testis damage through antioxidative action.

Cotreatment of genistein at a low dose may have a promising future on its protecting role for attenuating other EDC-induced reproductive disorders during early life.

Based on the results, it can be speculated that dietary intake of isoflavones may make the fetal testis less susceptible to phthalate-induced injury.