Comparative Study of Morpho-histology of Ovaries of Wt (hdrr) and P53 (-/-) of Medaka (oryzias Latipes)
نویسندگان
چکیده
In the present paper comparative study of morpho-histology of ovaries of both WT (HdrR) and P53 (-/-) of medaka (Oryzias latipes) has been done. The ovaries of adult are paired and oval-rounded in shape and are situated ventrolaterally. Histologically the ovaries consist of follicles with various stages of development, such as primodial follicle, large follicle and growing follicle. Also, the ovaries can be differentiated into outer functional regions and inner non-functional regions. The histological structure of the ovary in both strains fishes represents the generalized teleostean structure with some differences in follicles count and distribution. We conclude that, the difference recorded in the present study has an impact on the maturation inside and eggs release from the ovaries.
منابع مشابه
Irradiation-injured brain tissues can self-renew in the absence of the pivotal tumor suppressor p53 in the medaka (Oryzias latipes) embryo
The tumor suppressor protein, p53, plays pivotal roles in regulating apoptosis and proliferation in the embryonic and adult central nervous system (CNS) following neuronal injuries such as those induced by ionizing radiation. There is increasing evidence that p53 negatively regulates the self-renewal of neural stem cells in the adult murine brain; however, it is still unknown whether p53 is ess...
متن کاملA reproductive toxicology study of phenanthrene in medaka (Oryzias latipes).
Environmental contaminants, such as polycyclic aromatic hydrocarbons (PAHs), can disrupt the endocrine system and affect reproductive function of humans and wildlife. In this study, we exposed Japanese medaka (Oryzias latipes) to water-borne or food-spiked phenanthrene, an ubiquitous PAH, and investigated the chronic effects of the chemical on medaka reproduction. The results showed that phenan...
متن کاملEffects of methotrexate exposure on medaka (Oryzias latipes) testes
For the purpose of clarifying the histopathological effects of methotrexate (MTX) on medaka testes, wild-type and homogenic p53-deficient male medaka at 4 to 6 months post-hatching were exposed to 0.25 mg/ml of MTX for 96 h with histopathological examination of testes at 24, 48, 72 and 96 h. At 72 and 96 h after the start of MTX exposure, numerous apoptotic cells were observed in the spermatogo...
متن کاملExpression of guanylyl cyclase genes in medaka hybrids (Oryzias curvinotus x Oryzias latipes).
The Hong Kong-originated medaka fish Oryzias curvinotus expresses nine genes (OcGC1 approximately OcGC8 and OcGC-R2) for membrane guanylyl cyclases (membrane GCs) and three genes (OcGCS-alpha(1), OcGCS-alpha(2), and OcGCS-beta(1)) for soluble GC subunits. The deduced amino acid sequences of membrane GCs expressed in O. curvinotus were quite similar to those expressed in the Japanese medaka Oryz...
متن کاملDifferential expression of branchial Na+/K(+)-ATPase of two medaka species, Oryzias latipes and Oryzias dancena, with different salinity tolerances acclimated to fresh water, brackish water and seawater.
Previous studies on non-diadromous euryhaline teleosts introduced a hypothesis that the lowest level of gill Na(+)/K(+)-ATPase (NKA) activity occurs in the environments with salinity close to the primary natural habitats of the studied species. To provide more evidence of the hypothesis, two medaka species, Oryzias latipes and O. dancena, whose primary natural habitats are fresh water (FW) and ...
متن کامل