• 대한수의학회지
• /
• 제40권2호
• /
• pp.247-256
• /
• 2000

붉은귀거북이(red-eared slider, Trachemys scripta elegans)의 소화관에 존재하는 위장관내분비세포의 부위별 분포 및 출현빈도를 Grimelius 및 Masson-Hamperi(M-H)도은 염색을 이용하여 조직화학적으로 관찰하였다. 소화관은 식도, 기저부(fundus), 유문부, 십이지장, 공장, 회장 및 대장의 7부위로 구분하였다. 소화관 전 부위에 걸쳐 은호성세포(argy-rophil, Grimelius-positive cell) 및 은친화성세포(argentaffin cell, M-H-positive cell) 들이 관찰되었다. 타원형에서 방추형 또는 난원형에서 원형의 은호성세포 및 은친화성세포들이 기저부와 유문부의 위샘(gastric gland), 장 및 식도상피의 기저부에서 관찰되었으며, 소화관 각 부위별로 다양한 출현빈도를 나타내었다. 은호성세포들은 식도를 포함한 소화관 전 부위에서 관찰되었으며, 중등도의 출현빈도를 나타낸 직장에서 가장 높은 빈도를 나타내었고, 식도, 기저부, 십이지장, 공장 및 회장에서 극소수, 유문부에서는 소수 관찰되었다. 은친화성세포들 역시 소화관 전 부위에서 관찰되었으며, 은호성세포와 유사하게 다수의 출현빈도를 나타낸 직장에서 가장 높은 빈도를 나타내었고, 직장 이외의 부위에서는 소수의 세포들이 관찰되었다.

• 대한의생명과학회지
• /
• 제19권3호
• /
• pp.261-265
• /
• 2013

The corpus luteum is a transient endocrine gland essential for regulation of the ovarian cycle as well as for establishing and maintaining pregnancy. Prostaglandin $F_{2{\alpha}}$ (PGF) initiates functional and structural regression of the corpus luteum and therefore is an important regulator of the estrous cycle. It is a matter of debate whether the endothelial cells of the bovine corpus luteum express PGFR, the cognate receptor for PGF. Therefore, the aim of this study was to assess the expression of PGFR in bovine endothelial cells. Endothelial cells were isolated from the bovine corpus luteum of the mid-luteal stage using magnetic beads and cultured in vitro. We demonstrate that this isolation procedure generates a pure culture of endothelial cells as confirmed by synthesis of Factor VIII and lack of expression of $3{\beta}$-hydroxysteroid dehydrogenase. By RT-PCR, Western blot and immunofluorescence analyses, we further show that the cultured endothelial cells produced PGFR. This model system can be utilized to provide an experimental system to investigate the role of PGF on endothelial cells during the reproductive cycle.

• Asian-Australasian Journal of Animal Sciences
• /
• 제13권3호
• /
• pp.390-400
• /
• 2000

The corpus luteum (CL) is a temporary endocrine gland whose main function is to secrete progesterone to support pregnancy. On the other hand, the cyclic bovine CL has also been shown to be a site of prostaglandin $F_{2{\alpha}}$ ($PGF_{2{\alpha}}$) production. Although there is general agreement that endometrial $PGF_{2{\alpha}}$ is an essential luteolysin in cattle, luteal $PGF_{2{\alpha}}$ seems to play a luteotropic role as an autocrine and/or paracrine factor, especially for the development and maintenance of the CL. This supposition is based on evidence that some of the prerequisites for autocrine/paracrine mechanisms are present, including local production of $PGF_{2{\alpha}}$ and the existence of specific binding sites within the CL. The purpose of this paper is to review the regulation of luteal $PGF_{2{\alpha}}$ secretion, its action on CL as an autocrine and/or paracrine factor and the receptivity of bovine CL to. $PGF_{2{\alpha}}$.

• Advances in Traditional Medicine
• /
• 제6권2호
• /
• pp.86-95
• /
• 2006

The ethanol extract of the Crotalaria juncea seeds, which showed promising antispermatogenic and antiandrogenic activities in albino mice, was taken up further for the isolation of the active fractions present in it. Two fractions that were obtained from thin layer chromatography were subjected for testing to know their antispermatogenic and antiandrogenic activities. After preliminary trials the fraction I showed maximum antifertility activity at the dose level of 200 mg/kg body weight when administered orally to the rats for 50 days. The fraction I was found to affect spermatogenesis as well as the endocrine functions of the testis as indicated by gravimetric, histopathological and biochemical changes. Further this fraction has caused degenerative changes in the seminiferous tubules and Leydig cells of the testis. The accessory reproductive organs like epididymis, seminal vesicles, vas deferens, prostrate, Cowper's gland and Levator Ani muscle showed significant malfunction. Cauda epididymal sperm count and sperm motility were reduced significantly. The treatment has also resulted in increase in the cholesterol level and alkaline phosphatase activity, and decrease in protein, glycogen, sialic acid contents and acid phosphatase activity in testis. It is noteworthy that RIA studies have shown significant reduction in serum FSH, LH and testosterone. Scanning electron microscopic observations revealed abnormalities in sperm structure.

• 대한의생명과학회지
• /
• 제15권1호
• /
• pp.25-29
• /
• 2009

The changes on the regional distributions and frequencies of somatostatin-immunoreactive (IR) cells in the fundus and pylorus of the stomach of osteoporotic Sprague-Dawley rats induced by ovariectomy were studied by immunohistochemical methods. The experimental animals were divided into two groups, one for non-ovariectomized group (Sham) and the other for ovariectomized group (OVX). Samples were collected from the fundus and pylorus regions at the 10 th week after ovariectomy or sham-operation. Somatostatin-IR cells were observed in both regions of the stomach regardless of ovariectomy. Most of these IR cells in the mucosa of the fundus or pylorus were generally spherical or spindle in shape (open type cell) while cells found in the gastric gland regions were round in shape (close type cell). Significantly lower number (P<0.01) of somatostatin-IR cells were detected in OVX as compared with Sham in the fundus and pylorus. In the present study, the density of somatostatin in the stomach was markedly decreased. Therefore, these changes in density of somatostatin-IR cells detected in this study may support the speculation that the development of gastrointestinal symptoms in osteoporosis such as impairments of calcium and some lipids, frequently encountered in patients with postmenopausal osteoporosis because the changes in gastrointestinal endocrine density would reflect the change in the capacity of producing these hormones and regulating gut motility and digestion.

• Journal of Yeungnam Medical Science
• /
• 제36권1호
• /
• pp.54-58
• /
• 2019

Adrenocortical carcinoma is a rare type of endocrine malignancy with an annual incidence of approximately 1-2 cases per million. The majority of these tumors secrete cortisol, and a few secrete aldosterone or androgen. Estrogen-secreting adrenocortical carcinomas are extremely rare, irrespective of the secretion status of other adrenocortical hormones. Here, we report the case of a 53-year-old man with a cortisol and estrogen-secreting adrenocortical carcinoma. The patient presented with gynecomastia and abdominal discomfort. Radiological assessment revealed a tumor measuring $21{\times}15.3{\times}12cm$ localized to the retroperitoneum. A hormonal evaluation revealed increased levels of estradiol, dehydroepiandrosterone sulfate, and cortisol. The patient underwent a right adrenalectomy, and the pathological examination revealed an adrenocortical carcinoma with a Weiss' score of 6. After surgery, he was treated with adjuvant radiotherapy. Twenty-one months after treatment, the patient remains alive with no evidence of recurrence.

• 한국가축번식학회지
• /
• 제19권4호
• /
• pp.307-322
• /
• 1996

The corpus luteum (CL) is formed by the action of a surge of luteinizing hormone (LH) on the pre-ovulatory follicle. Luteal cells derived from granulosa and theca interna cells continue to secrete progesterone for about two weeks. LH in domestic animals is essential for the normal secretion of progesterone at all stages of the luteal phase. For this process in the rodents, 20$\alpha$-hydroxysteroid dehydrogenase (20$\alpha$-HSD) is indispensable. 20$\alpha$-HSD is an enzyme to be a biologically inactive steroid. This enzyme plays a critical role in the regulation of the rat luteal function and reported to be present in steroid-producing tissues such as the testis and adrenal gland. We have purified 20$\alpha$-HSD and found two distinct 20$\alpha$-HSD molecules (HSD-1 and HSD-2). Their molecular weights are both estimated to be 33kd.The amino acid compositions of HSD-1 and HSD-2 are mostly similar, but there is a slight difference in the content of lysine. We demonstrated that 1) CL of previous generations contribute more to whole ovarian 20$\alpha$-HSD activity, 2) newly formed corpora lutea contain only 20$\alpha$-HSD-1 activity, and 3) old CL express activities of each HSD isozyme as shown in the luteal tissue of cycling rats on the day of diestrus where only degenerating old CL exist. The increase in 20$\alpha$-HSD activity identified seems to be related to the increase in the numbers of 20$\alpha$-HSD-positive cells. Interestingly, 20$\alpha$-HSD-1 activities were strongly found in the follicle fluids and theca interna cells by immunohistochemical study. Thus, the activity of 20$\alpha$-HSD may be related to a survival mechanism of those luteal cells and follicles remaining in the ovaries. Luteal cells arise from two sources. The small luteal cells are all of theca cell origin, while the large luteal cells are mainly of granulosa cell origin. CL of Korean Native Cattle, as those of other animal species, contains two morphologycally and functionally distinct luteal cell populations, such as small and large luteal cells as well as nonluteal cells. In all reproductive states except in the late luteal phase, the bovine CL also contained more small luteal cells than large luteal cells. Luteal tissue secretes a variety of growth factors (proteins) and the pattern of secretion changes during all stages of the luteal phase. These growth factors could be important in regulating the function of the bovine corpus luteum and may act in a potential endocrine autocrine and paracrine mechanisms. Therefore, further work has to be done to elucidate the role of growth factors in the ovary, especially in the corpus luterum. Interest should be focussed on interaction of these growth factors in the regulation of luteal cell and the localization of cytokine synthesis in differnet luteal cells.

• 대한수의학회지
• /
• 제42권3호
• /
• pp.289-297
• /
• 2002

쏘가리 (Siniperca scherzeri Steindachner)의 위장관에 존재하는 내분비세포의 부위별 분포 및 출현빈도를 포유류의 peptide에 대한 7종류의 항혈청을 사용하여 면역조직화학적 방법으로 관찰하였다. 쏘가리의 위장관은 근위부에서부터 원위부까지 위, 소장 및 대상으로 3 등분 하였으며, 다양한 종류의 항혈청에 면역반응성을 나타내는 면역반응세포들이 상피세포 사이와 위샘 또는 장샘에서 관찰되었다. 상피세포 사이에서는 대부분의 면역반응세포들은 장 내강까지 신장되어 있는 긴 세포질 돌기를 함유한 방추형의 개방형 세포 (open type cell)로 관찰되었으며, 세포질 돌기 없이 원형 또는 타원형의 형태를 나타내는 폐쇄형 세포 (close type cell)들이 위 부위에서 소수 관찰되었다. 본 실험에서는 serotonin, somatostatin, pastrin, cholecystokinin (CCK)-8 및 human pancreatic polypeptide (HPP) 면역반응세포들이 관찰되었으나, insulin 및 glucagon 면역반응세포들은 관찰되지 않았다. Serotonin 및 somatostatin 면역반응세포들은 위 부위에 국한되어 각각 중등도 및 다수의 출현빈도로 관찰되었다. 또한 gastrin 면역반응세포들은 위와 소장에서 출현하였으며, 각각 소수 및 중등도의 출현빈도를 나타내었고, CCK-8 면역반응세포들은 소장에 국한되어 중등도의 출현빈도를 나타내었다. 한편 HPP 면역반응세포들은 위와 소장에서 다수 관찰되었다. 이상에서 쏘가리 위장관 내분비세포들의 부위별 분포 및 출현 빈도는 다른 경골어류에 비해 특이한 양상을 나타내는 것으로 관찰되었다.

• Asian-Australasian Journal of Animal Sciences
• /
• 제22권5호
• /
• pp.636-642
• /
• 2009

The corpus luteum (CL) is a transient endocrine gland that produces progesterone, a product required for the establishment and maintenance of pregnancy. In the absence of pregnancy, the production of progesterone in the CL decreases and the structure itself regresses in size. The life span and function of the CL are regulated by complex interactions between stimulatory (luteotrophic) and inhibitory (luteolytic) mediators. When an ovum is released from a mature follicle, angiogenesis and rapid growth of follicular cells form the CL. The purpose of the present study was to determine whether steroidogenesis, proliferation, and hypoxiarelated proteins are expressed in caprine CL. The expression of proliferating cell nuclear antigen (PCNA), vascular endothelial growth factor (VEGF), and hypoxia-inducible factor $1{\alpha}$ (HIF-$1{\alpha}$) were determined in caprine CL during the estrous cycle. Cytochrome P450 side chain cleavage protein did not vary significantly during the estrous cycle; however, there was an increased expression of $3{\beta}$ -hydroxysteroid dehydrogenase in the early and middle stages, which rapidly decreased in the late stage. The same observations were made with respect to steroidogenic acute regulatory protein. Variations in progesterone content and expression of PCNA, HIF-$1{\alpha}$, and VEGF were consistent with this result. Thus, the steroidogenic proteins, PCNA, HIF-$1{\alpha}$, and VEGF in caprine CL are dependent on the stage of the estrous cycle.

• Journal of Acupuncture Research
• /
• 제20권6호
• /
• pp.63-79
• /
• 2003

Objective: It makes a through study on the popularization and usefulness paln of Moxa Combustion, therefore popularizing practical use of that. Methods: It was based on the established treatises and books, in order to studying about the literature of Moxa Combustion Results & Conclusions: It makes a through study on the whole of Moxa Combustion, the results as follows. 1. We explained(illustrated) the origin, history, classification and mechanism(effect) of Moxa Combustion 2. The study of standardization plan of Moxa Combustion for popularization - The thermal stimulation of Moxa Combustion was decided the characteristic pattern of combustion temperature by moxa burning and that makes a measure to grasp the effective action of Moxa Combustion upon human body. Thereupon it is necessary to continue further studies by analysing the characteristic pattern of combustion temperature by moxa burning and there clinical effects in practice. 3. The usefulness of Moxa Combustion - The therapeutic effect of Moxa Combustion are hematopoiesis(increase the blood), analgesic function, increase the immunity, antioxidant activity, diuretic action, control of hormone(endocrine gland), supression of carcinogenesis, increase the self involution(natural healing), decrease of GOT/GPT, Glucose, Cholesterol level.