Immunocytochemical localization of different cell types in the adenohypophysis of the cichlid fish Cichlasoma dimerus (Heckel, 1840)

The adenohypophysis of the cichlid fish Cichlasoma dimerus was studied using the avidin-biotin-peroxidase method with antisera raised against piscine pituitary hormones and heterologous antisera against mammalian pituitary hormones. Antiserum raised against rabbit ACTH recognized a group of cells bordering the neurohypophysis (NH) in the rostral pars distalis (RPD). Anti-chum salmon prolactin (PRL) identified a compact group of cells in the periphery of the RPD. Gonadotropin II (GTH II), thyrotropin (TSH) and growth hormone (GH)-ir cells were localized in the proximal pars distalis. Ir-GTH II cells were also observed in the dorsal area of the pars intermedia (PI). Ir-GTH I cells could not be identified using anti-chum salmon GTH I, this may be due either to a failure of the antisera to recognize the gonadotropin or to a low expression of the hormone in adults of this species. PAS positive cells from the PI bound specifically with three different antisera raised against somatolactin (SL) of four different fish species. These cells surrounded deep branches of the NH in the PI.

Pituitary-gonadal hormones in insulin-dependent and non-insulin dependent diabetic Egyptian males with and without neuropathy or retinopathy

Few prospective data are available regarding the association of pituitary-gonadal hormones, and the risk of developing diabetes mellitus. Therefore, FSH, LH and prolactin were determined in types I and II diabetic male Egyptian patients with and without complications [neuropathy or retinopathy] and nondiabetic healthy controls, testosterone was also assessed. All patients and controls underwent laboratory investigations, including fasting and post-prandial blood sugar level, serum levels of cholesterol, triacylglycerol, HDL-C and LDL-C

Comparacao dos perfis hipofisario, esteroidiano e lipoproteico em pacientes com galactorreia normoprolactinemica e galactorreia hiperprolactinemica / Comparison of pituitary, steroid and lipoprotein profile in patients with hyperprolactinemic and normoprolactinemic galactorrhea

Objetivos: Avaliar o comportamento dos perfis hipofisario, esteroidiano e lipoproteico em pacientes com galactorreia hiperprolactinemica e galactorreia normoprolactinemica. Desenho: Foram estudadas 39 pacientes: 18 com galactorreia hiperprolactinemica e 21 com galactorreia normoprolactinemica. A avaliacao laboratorial constou das dosagens de PRL, FSH, LH e TSH (perfil hipofisario); estradiol, testosterona, androstenediona, deidroepiandrosterona e seu sulfato, 17-alfa-hidroxiprogesterona (perfil lipoproteico). O tratamento estatistico foi realizado atraves da comparacao das medias e dos respectivos desvios padrao. Resultados: O perfil hipofisario nao diferiu entre os dois grupos exceto em relacao a prolactina...

Pituitary adenomas: immunohistochemical: study of 90 cases.

Pituitary tumors from 90 patients were investigated using immunohistochemical study and the results were correlated with clinical records. There were 32 benign prolactinomas and two malignant counterparts, 13 growth hormone positive tumors. 10 corticotropic adenomas, and 10 gonadotropic tumors. Four tumors showed positivity for both prolactin and growth hormone, one prolactin and gonadotropin. An example of mixed, luteinizing hormone, prolactin and growth hormone was observed. Additionally, there was an adenoma composed of two compartments secreting prolactin and growth hormone. One patient had a recurrent gonadotropin adenoma after surgical removal of the original prolactinoma. Fifteen tumors were negative for all hormones and most were nonfunctioning clinically. The clinicopathologic correlations were found to be good for prolactinoma, growth hormone positive tumors and for tumors producing both prolactin and growth hormones causing a combined feature of hyperprolactinemia and acromegaly.

Análisis clínicos y de la función hipofisiaria en pacientes con el síndrome de la silla turca vacía primaria / Analysis of clinical and hypophyseal function in patients with primary empty sella turcica syndrome

Se informan los hallazgos clínicos, hormonales y radiológicos en 22 casos de silla turca vacía primaria (STVP), en pacientes que tenían un promedio de edad de 44,5 años y además predominó en mujeres. El cuadro clínico consistió en cefalea (90,9%), síndrome quiasmático (18%) y fístula del líquido cefalorraquideo en 13,6 por ciento. Todos los pacientes tenían obesidad y prácticamente la mitad (45.4%) padecián hipertensión arterial. El diagnóstico se confirmó mediante una tomografia axial computada de cráneo usando como medio de contraste a la metrizamida. En todos los casos se encontró que la función hipofisaria, evaluada por la concentración de las hormonas circulantes, era normal. La presencia de fístula de líquido cefalorraquideo o de un síndrome quiasmático fueron las indicaciones para realizar cirugía transesfenoidal. Siete pacientes que fueron sometidos a cirugía, seis evolucionaron satisfactoriamente