3:00 PM 25. THE EPIDIDYMAL JUNCTIONAL COMPLEX IS IMPAIRED BY TRIBUTYLTIN EXPOSURE. Barthelemy, Johanna¹, Dufresne, Julie¹, Cyr, Daniel¹, ¹ INRS-Institut Armand-Frappier, Pointe-Claire, QC, Canada

3:15 PM 26. EFFECTS OF DIETARY FATS AND PROTEINS ON METHYLMERCURY-MEDIATED TOXICITY IN RATS: TESTICULAR STEROIDOGENIC ENZYMES AND SERUM TESTOSTERONE LEVELS. Cooke, Gerard^{1, 2}, McVey, Mark¹, Lok, Eric¹, Chan, Hing Man³, Mehta, Rekha¹, ¹ Health Canada, Ottawa, ON, Canada² University of Ottawa, Ottawa, ON, Canada³ McGill University, Ste.-Anne-de-Bellvue, QC, Canada

3:30 PM 27. EFFECTS OF HYPOXIA ON THE RELEASE OF TESTOSTERONE AND VASCULAR ENDOTHELIAL GROWTH FACTOR IN MOUSE TM3 LEYDIG CELLS. Huang, Wei-Ju¹, Tseng, Wen-Min ¹, Wang, Jiing-Rong¹, Wu, Ching-I¹, Wang, Kai-Lee¹, Lee, Yin-Huei¹, Wang, Paulus S¹, ¹ National Yang-Ming University, Taipei, Taiwan, R.O.C.

3:45 PM 28. ACUTE ADVERSE AFFECTS OF THE INDENOPYRIDINE, CDB-4022 (RACEMATE), ON THE ULTRASTRUCTURE OF SERTOLI CELLS, SPERMATOCYTES AND SPERMATIDS IN THE TESTES OF TREATED RATS: COMPARISON TO THE KNOWN SERTOLI CELL TOXICANT, DI-N-PENTYLPHTHALATE (DPP). Hild, Sheri¹, Reel, Jerry¹, Dykstra, Michael², Mann, Peter³, Marshall, Gary⁴, ¹ BIOQUAL, Inc., Rockville, MD² North Carolina State University, Raleigh, NC³ Experimental Pathology Laboratories, Inc., Herndon, VA⁴ University of Pittsburgh, Pittsburgh, PA

4:00 PM 29. EFFECTS OF THYROID HORMONES ON DI(N-BUTYL) PHTHALATE (DBP)-INDUCED OXIDATIVE DAMAGES IN SPRAGUE-DAWLEY RATS TESTIS. Lee, Ena ¹, Ahn, Mi Young¹, Kim, Hee Jin¹, Kim, Hyung Sik, ¹ Pusan National University, College of Pharmacy, Pusan, Korea

4:15 PM 30. COMBINATION DOSE OF TWO PHTHALATES ADDITIVELY DEPRESSES TESTOSTERONE PRODUCTION AND INSL3 GENE EXPRESSION IN MALE RAT FETUSES. Howdeshell, Kembra¹, Furr, Johnathan², Lambright, Christy², Wilson, Vickie², Gray, L. Earl², ¹ North Carolina State University, Raleigh, NC² US Environmental Protection Agency, Research Triangle Park, NC

4:30 PM 31. HERITABLE HEAT STRESS-INDUCED SUBFERTILITY IN MALE MICE. Cammack, Kristi¹, Mesa, Henry¹, Sutovsky, Peter¹, Lamberson, William¹, ¹ University of Missouri, Columbia, MO

4:45 PM 32. HORMONE-REGULATED SOMATIC TESTICULAR CELL GENES CORRELATING WITH BLOCKED SPERMATOGONIAL DIFFERENTIATION IN IRRADIATED RATS. Bolden-Tiller, Olga¹, Shetty, Gunapala ¹, Weng, Connie¹, Stivers, David¹, Meistrich, Marvin¹, ¹ University of Texas - MD Anderson Cancer Center, Houston, TX