Biology of reproduction in the squirrel monkey (Saimiri sciureus): II. The ovary

Srivastava, Probodh K.; Cavazos, Filiberto; Lucas, Fred V.

doi:10.1007/bf01793892

Cited by 5 publications

(2 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…More recently, this morphological feature was found in other genera and species of cebids (ECKSTE1N, 1958;CASTELLANOS & MACCOMBS, 1968;LANG, 1967;HERTIG et z. '., 1971 ;SRIVASTAVA, CAVAZOS & LUCAS, 1970;MOSSMAN & DUKE, 1973 ;HERTIG, BARTON & MACKEY, 1976). In less amount, glandular interstitial tissue has also been observed in callithricids (WISLOCKI, 1939;HAMVTON & TAYLOR, 1971;GURAYA, 1968GURAYA, , 1974.…”

Section: Introductionmentioning

confidence: 93%

Microscopic anatomy of the ovary ofAlouatta caraya

1984

View full text Add to dashboard Cite

ABSTRACT. The microscopic structure of the Alouatta caraya ovary is studied in different ages and reproductive stages. The most significant feature seems to be the presence in adult ovaries of abundant glandular interstitial tissue which occupies both the cortex and medulla. It seems to be derived from the theca interna of atretic follicles. Discrete luteinized masses are present in the medulla in all the ovaries observed. Invaginations of the surface epithelium are seen only in infant and juvenile ovaries. The development of cystic follicles seems to be a common pathway of atresia.

show abstract

Section: Introductionmentioning

confidence: 93%

Microscopic anatomy of the ovary ofAlouatta caraya

1984

View full text Add to dashboard Cite

show abstract

“…A similar comparison of elevated E and P concentrations in the squirrel monkey has previously been reported [Wolf et al, 1977;Ghosh et al, 1982;Diamond et al, 1984;Yeoman et al, 1991b] and was partially attributed to an amplified steroid synthesis pathway in the squirrel monkey [Hammani & Sitteri, 1990]. This relatively enhanced ovarian synthetic activity in the squirrel monkey can now be expanded to include elevated nonsteroidal ovarian hormone expression and may be partially related to the extensive luteal-like interstitial tissue in the squirrel monkey ovary [Hertig et al, 1970;Srivastava et al,1970].…”

Section: Discussionmentioning

confidence: 90%

Elevated ovarian expression and serum concentration of α inhibin in the luteal phase during follicular development in the squirrel monkey (Saimiri boliviensis) compared to the human

et al. 1999

View full text Add to dashboard Cite

The goal of the present investigation was to determine in the squirrel monkey the source and pattern of inhibin, a hormone known to effect reproductive steroid levels via pituitary and ovarian mechanisms. Since this seasonally polyestrous species is known to have elevated serum levels of reproductive steroids compared to other primates, the levels of ovarian alpha subunit mRNA expression and serum total alpha inhibin, estradiol, progesterone, and luteinizing hormone were measured and compared to human levels. Expression of the alpha subunit was robust in monkey luteal tissue compared to expression in human luteal tissue. Squirrel monkey serum inhibin peaked 4 days after the luteinizing hormone surge and correlated with progesterone changes. These luteal serum levels of inhibin were greater than 12 times higher than the human levels yet bio-LH activities were less than in the human during the luteal phase. Inhibin concentrations during the nonbreeding season were generally half the levels measured in the breeding season and undetectable in ovariectomized animals. However, exogenous FSH stimulation induced a marked rise in inhibin, which correlated with an estradiol rise. In conclusion, abundant alpha inhibin subunit expression in the luteal ovary of the squirrel monkey and loss of serum delectability in ovariectomized animals indicates that the principle source of inhibin in the squirrel monkey is the ovary. Elevated serum inhibin levels during the luteal phase concurrent with ovulatory-size follicular development is unique among species studied thus far. Possible simultaneous inhibin production from both follicular and luteal tissue may be responsible for the exceptionally high inhibin levels.

show abstract

Elevated ovarian expression and serum concentration of ? inhibin in the luteal phase during follicular development in the squirrel monkey (Saimiri boliviensis) compared to the human

et al. 1999

View full text Add to dashboard Cite

The goal of the present investigation was to determine in the squirrel monkey the source and pattern of inhibin, a hormone known to effect reproductive steroid levels via pituitary and ovarian mechanisms. Since this seasonally polyestrous species is known to have elevated serum levels of reproductive steroids compared to other primates, the levels of ovarian alpha subunit mRNA expression and serum total alpha inhibin, estradiol, progesterone, and luteinizing hormone were measured and compared to human levels. Expression of the alpha subunit was robust in monkey luteal tissue compared to expression in human luteal tissue. Squirrel monkey serum inhibin peaked 4 days after the luteinizing hormone surge and correlated with progesterone changes. These luteal serum levels of inhibin were greater than 12 times higher than the human levels yet bio‐LH activities were less than in the human during the luteal phase. Inhibin concentrations during the non‐breeding season were generally half the levels measured in the breeding season and undetectable in ovariectomized animals. However, exogenous FSH stimulation induced a marked rise in inhibin, which correlated with an estradiol rise. In conclusion, abundant alpha inhibin subunit expression in the luteal ovary of the squirrel monkey and loss of serum delectability in ovariectomized animals indicates that the principle source of inhibin in the squirrel monkey is the ovary. Elevated serum inhibin levels during the luteal phase concurrent with ovulatory‐size follicular development is unique among species studied thus far. Possible simultaneous inhibin production from both follicular and luteal tissue may be responsible for the exceptionally high inhibin levels. Am. J. Primatol. 47:165–179, 1999. © 1999 Wiley‐Liss, Inc.

show abstract

Biology of reproduction in the squirrel monkey (Saimiri sciureus): II. The ovary

Cited by 5 publications

References 8 publications

Microscopic anatomy of the ovary ofAlouatta caraya

Microscopic anatomy of the ovary ofAlouatta caraya

Elevated ovarian expression and serum concentration of α inhibin in the luteal phase during follicular development in the squirrel monkey (Saimiri boliviensis) compared to the human

Elevated ovarian expression and serum concentration of ? inhibin in the luteal phase during follicular development in the squirrel monkey (Saimiri boliviensis) compared to the human

Contact Info

Product

Resources

About