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  • Title: The effect of mono-(2-ethylhexyl) phthalate and other phthalate esters on lactate production by Sertoli cells in vitro.
    Author: Moss EJ, Cook MW, Thomas LV, Gray TJ.
    Journal: Toxicol Lett; 1988 Jan; 40(1):77-84. PubMed ID: 3341051.
    Abstract:
    Sertoli cells produce lactate and pyruvate as energy substrates for the developing germ cells in the testis. Since the Sertoli cells are thought to be the initial target for phthalate esters causing testicular atrophy, the effect of some phthalates on lactate and pyruvate production by primary Sertoli cell-enriched cultures was studied. Mono-(2-ethylhexyl) phthalate (0.1-200 microM) produced a concentration-dependent stimulation of lactate, but not pyruvate production over a 24 h treatment period and an increase in the ratio of lactate/pyruvate concentration in the culture medium. Di-(2-ethylhexyl) phthalate and 2-ethylhexanol (200 microM) had no such effects. Other phthalate monoesters known to cause testicular atrophy also increased Sertoli cell lactate production and the lactate/pyruvate ratio, whereas monoesters not associated with testicular damage in vivo had no such effects. The results suggest that loss of germ cells in phthalate-induced testicular atrophy is not due to inhibition of energy substrate production by the Sertoli cells and that stimulation of lactate production may be a useful in vitro marker for phthalate esters and related compounds that cause testicular injury.
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