Search Results - "Lu, John K. H."

Estradiol Stimulates Progesterone Synthesis in Hypothalamic Astrocyte Cultures by Micevych, Paul E, Chaban, Victor, Ogi, Julie, Dewing, Phoebe, Lu, John K. H, Sinchak, Kevin

“…The brain synthesizes steroids de novo, especially progesterone. Recently estradiol has been shown to stimulate progesterone synthesis in the hypothalamus and…”
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The Type I BMP Receptor BmprIB is Essential for Female Reproductive Function by Yi, Soyun E., LaPolt, Philip S., Yoon, Byeong S., Jean Y.-C. Chen, John K. H. Lu, Lyons, Karen M.

“…Maintenance of female reproductive competence depends on the actions of several hormones and signaling factors. Recent reports suggest roles for bone…”
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Temporal Changes Occur in the Neuroendocrine Control of Gonadotropin Secretion in Aging Female Rats: Role of Progesterone by TSAI, Houng-Wei, LAPOLT, Philip S, OLCOTT, Angelica P, LU, John K. H

“…The present study examined the gonadotropin surge-inducing actions of estradiol (E 2 ), both alone and with progesterone (P 4 ), in middle-aged, early…”
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The luteinizing hormone surge is preceded by an estrogen-induced increase of hypothalamic progesterone in ovariectomized and adrenalectomized rats by Micevych, Paul, Sinchak, Kevin, Mills, Richard H, Tao, Leslie, LaPolt, Philip, Lu, John K H

“…As circulating estrogen levels rise on the afternoon of proestrus, they stimulate the hypothalamo-pituitary axis. This estrogen positive feedback is pivotal to…”
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Site-specific decrease of progesterone receptor mRNA expression in the hypothalamus of middle-aged persistently estrus rats by Mills, Richard H, Romeo, Horacio E, Lu, John K.H, Micevych, Paul E

“…Middle-aged females gradually become acyclic and spontaneously develop a persistently estrus (PE) state. PE rats, acyclic for 30 days (early PE), are…”
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Steroid secretion in polycystic ovarian disease after ovarian suppression by a long-acting gonadotropin-releasing hormone agonist by Chang, R J, Laufer, L R, Meldrum, D R, DeFazio, J, Lu, J K, Vale, W W, Rivier, J E, Judd, H L

“…The principal glandular source of increased serum androgens in polycystic ovarian disease (PCO) is controversial), since complete separation of ovarian from…”
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Estrogen induces de novo progesterone synthesis in astrocytes by Sinchak, Kevin, Mills, Richard H, Tao, Leslie, LaPolt, Philip, Lu, John K H, Micevych, Paul

“…The brain is an established target for peripheral steroids, but also expresses steroidogenic enzymes and is capable of de novo 'sex' steroid synthesis…”
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An Abnormal Pattern of Embryonic Development during Early Pregnancy in Aging Rats1 by Day, Jonathan R., La Polt, Philip S., Morales, Tony H., Lu, John K. H.

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Clinical and hormonal effects of chronic gonadotropin-releasing hormone agonist treatment in polycystic ovarian disease by Steingold, K, De Ziegler, D, Cedars, M, Meldrum, D R, Lu, J K, Judd, H L, Chang, R J

“…Previously, we reported that short term administration of a highly potent GnRH agonist (GnRHa) for 1 month to patients with polycystic ovarian disease (PCO)…”
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The Relation of Ovarian Steroid Levels in Young Female Rats to Subsequent Estrous Cyclicity and Reproductive Function during Aging1 by Lapolt, Philip S., Maff, Dennis W., Judd, Howard L., Lu, John K. H.

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Relationship between circulating estrogens and the central mechanisms by which ovarian steroids stimulate luteinizing hormone secretion in aged and young female rats by Lu, J K, Gilman, D P, Meldrum, D R, Judd, H L, Sawyer, C H

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Relation of circulating estradiol and progesterone to gonadotropin secretion and estrous cyclicity in aging female rats by Lu, J K, LaPolt, P S, Nass, T E, Matt, D W, Judd, H L

“…The progressive cessation of regular ovulatory function in aging female rats is preceded by a significant decrease in the magnitude of the proestrous LH surge…”
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Relationship Between Progesterone and Prolactin Surges in Aged and Young Pseudopregnant Rats1 by Gilman, Dennis P., Lu, JOHN K. H., Whitmoyer, David I., Judd, Howard L., Sawyer, C. H.

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Differential Patterns of Gonadotropin Responses to Ovarian Steroids and to LH-Releasing Hormone Between Constant-Estrous and Pseudopregnant States in Aging Rats1 by Lu, John K. H., Damassa, David A., Gilman, Dennis P., Judd, Howard L., Sawyer, Charles H.

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Temporal Changes Occur in the Neuroendocrine Control of Gonadotropin Secretion in Aging Female Rats: Role of Progesterone1 by Tsai, Houng-Wei, LaPolt, Philip S, Olcott, Angelica P, Lu, John K. H

“…The present study examined the gonadotropin surge-inducing actions of estradiol (E2), both alone and with progesterone (P4), in middle-aged, early…”
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Influences of Age and Ovarian Follicular Reserve on Estrous Cycle Patterns, Ovulation, and Hormone Secretion in the Long-Evans Rat1 by Anzalone, Christopher R, Hong, Long-Sheng, Lu, John K. H, LaPolt, Philip S

“…This study examined the influences of aging and reduced ovarian follicular reserve on estrous cyclicity, estradiol (E2) production, and gonadotropin secretion…”
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Influences of age and reproductive status on ovarian ovulatory responsiveness to gonadotropin stimulation by Anzalone, C R, Lu, J K, LaPolt, P S

“…Reproductive aging in the female rat is associated with the gradual loss of regular ovulatory function, decreased fertility, and smaller litter sizes. In the…”
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Effects of Estradiol and Progesterone on Early Embryonic Development in Aging Rats1 by Lapolt, Philip S., Day, Jonathan R., Lu, John K. H.

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Influences of Age and Ovarian Follicular Reserve on Estrous Cycle Patterns, Ovulation, and Hormone Secretion in the Long-Evans Rat by ANZALONE, Christopher R, HONG, Long-Sheng, LU, John K. H, LAPOLT, Philip S

“…This study examined the influences of aging and reduced ovarian follicular reserve on estrous cyclicity, estradiol (E 2 ) production, and gonadotropin…”
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Neuroendocrine Control of Luteinizing Hormone Secretion and Reproductive Function in Spontaneously Persistent-Estrous Aging Rats1 by Matt, Dennis W., Coquelin, Arthur, Lu, John K. H.

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