TY - CHAP A1 - Callard, G V A1 - McClusky, L M A1 - Betka, M T1 - Apoptosis as a normal mechanism of growth control and target of toxicant actions during spermatogenesis: insights using the shark testis model. Y1 - 1998/06/30 N1 - R825434 SP - 125 EP - 128 PB - Springer ER - TY - CHAP A1 - Callard, G V A1 - Callard, I P T1 - Spermatogenesis in nonmammals. Y1 - 1999/10/23 N1 - R825434 VL - 4 SP - 563 EP - 570 ER - TY - CHAP A1 - Engel, K B A1 - Callard, G V T1 - The testis and spermatogenesis. Y1 - 2005/03/1 N1 - R825434 VL - 3 SP - 171 EP - 200 PB - Science Publishers ER - TY - CHAP A1 - Engel, K B A1 - Callard, G V T1 - Endocrinology of Leydig cells in nonmammalian vertebrates. Y1 - 2007// N1 - R825434 SP - 207 EP - 224 PB - Humana Press ER - TY - JOUR A1 - Betka, M A1 - Callard, G V T1 - Stage-dependent accumulation of cadmium and induction of metallothionein-like binding activity in the testis of the dogfish shark, Squalus acanthias. Y1 - 1999/01/1 N1 - R825434 JF - BIOLOGY OF REPRODUCTION J1 - BIOL REPROD VL - 60 IS - 1 SP - 14 EP - 22 ER - TY - JOUR A1 - Betka, M A1 - Welenc, A A1 - Franks, D G A1 - Hahn, M E A1 - Callard, G V T1 - Characterization of two aryl hydrocarbon receptor (AHR) mRNA forms in Squalus acanthias and stage-dependent expression during spermatogenesis. Y1 - 2000/01/1 N1 - R825434 VL - 39 SP - 110 EP - 112 ER - TY - JOUR A1 - McClusky, L M T1 - Stage and season effects on cell cycle and apoptotic activities of germ cells and Sertoli cells during spermatogenesis in the spiny dogfish (Squalus acanthias). Y1 - 2005/01/ N1 - R825434 JF - REPRODUCTION J1 - REPRODUCTION VL - 129 IS - 1 SP - 89 EP - 102 ER - TY - JOUR A1 - McClusky, L M T1 - Stage-dependency of apoptosis and the blood-testis barrier in the dogfish shark (Squalus acanthias): cadmium-induced changes as assessed by vital fluorescence techniques. Y1 - 2006/09/ N1 - R825434 JF - CELL AND TISSUE RESEARCH J1 - CELL TISSUE RES VL - 325 IS - 3 SP - 541 EP - 553 ER - TY - JOUR A1 - Wang, C A1 - Callard, G V T1 - Polymerase chain reaction (PCR)-differential display identifies a subset of stage-dependent and cadmium-regulated genes during spermatogenesis in Squalus acanthias. Y1 - 2001/07/ N1 - R825434 VL - 40 SP - 96 EP - 98 ER - TY - CONF A1 - Betka, M A1 - Welenc, A A1 - Franks, D G A1 - Hahn, M E A1 - Callard, G V T1 - Stage-related distribution of two aryl hydrocarbon receptor (AhR) forms in the spiny dogfish (Squalus acanthias) testis and effects of AhR agonists on spermatogonial proliferation and death. Y1 - 1999/11/ N1 - R825434 ER - TY - CONF A1 - Callard, G V A1 - McClusky, L A1 - Betka, M T1 - Stage-specific effects of hormones and spermatotoxicants on germ cell proliferation and death: the shark testis model. Y1 - 1999/08/ N1 - R825434 ER - TY - CONF A1 - Callard, G V A1 - Wang, C A1 - Sikora, R A1 - Betka, M T1 - In vivo effects of cadmium on the estrogen signaling pathway during spermatogenesis. Y1 - 1999/10/ N1 - R825434 ER - TY - CONF A1 - Callard, G A1 - Wang, C T1 - PCR-differential display identifies a subset of stage-dependent and cadmium-regulated mitochondrial genes during spermatogenesis. Y1 - 2000/05/ N1 - R825434 ER -