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Rosales GJ, Filippa VP, Mohamed FH. Effect of estrogens on apoptosis in the pituitary of viscachas (Lagostomus maximus maximus). ZOOLOGY 2024; 164:126171. [PMID: 38761613 DOI: 10.1016/j.zool.2024.126171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 04/13/2024] [Accepted: 05/06/2024] [Indexed: 05/20/2024]
Abstract
Estrogens, acting through their receptors (ERα and ERβ), regulate cell turnover in the pituitary gland, influencing cell proliferation and apoptosis across various species. However, their role in pituitary processes in seasonally reproducing animals remains poorly understood. This study aims to investigate the influence of estrogens, through the expression of their specific receptors, on the apoptosis of PD cells in relation to sexual maturity, the reproductive cycle, and pregnancy in a seasonal reproductive rodent (Lagostomus maximus maximus). ERα and caspase-3-cleaved (CASP3c) immunoreactive (-ir) cells were identified through immunohistochemistry. Apoptotic cells were detected using the TUNEL technique, with quantitative analysis facilitated by image analysis software, alongside measurement of serum estradiol levels using radioimmunoassay The immunostaining pattern for ERα included nuclear (ERαn) and cytoplasmic (ERαc) staining. In male viscachas, ERα expression significantly increases from immature to adult animals, correlating with the rise in serum estradiol levels and a decrease in the percentage of apoptotic cells. During the gonadal regression period in adult males, a decrease in the number of ER-ir cells and serum levels of estradiol corresponds with an increase in the number of apoptotic cells. In females, serum levels of estradiol peaked during mid-pregnancy, coinciding with a significant decrease in the number of apoptotic cells in the PD. Simultaneously, the percentage of ERαn-ir cells reaches its maximum value during late pregnancy, indicating the need to maintain the protective action of this gonadal hormone throughout the extensive pregnancy in these rodents. Regional ERα receptor expression and apoptotic cells appear to be associated with distinct PD cell populations and their hormonal responses. Finally, elevated estradiol levels coincide with diminished apoptotic cells in the male reproductive cycle and during pregnancy, suggesting an antiapoptotic role of estradiol in this species.
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Affiliation(s)
- Gabriela Judith Rosales
- Laboratorio de Histología, Área Morfología, Departamento de Bioquímica, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Av. Ejército de los Andes 950 Bloque I Piso 1º, San Luis 5700, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
| | - Verónica Palmira Filippa
- Laboratorio de Histología, Área Morfología, Departamento de Bioquímica, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Av. Ejército de los Andes 950 Bloque I Piso 1º, San Luis 5700, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina.
| | - Fabian Heber Mohamed
- Laboratorio de Histología, Área Morfología, Departamento de Bioquímica, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Av. Ejército de los Andes 950 Bloque I Piso 1º, San Luis 5700, Argentina
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2
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Gallol LE, Busolini FI, Mohamed FH. Influence of melatonin and sexual hormones on the expression of proliferating cell nuclear antigen in the adrenal cortex of a seasonal breeder (Lagostomus maximus). Anat Rec (Hoboken) 2020; 303:3052-3067. [PMID: 32445505 DOI: 10.1002/ar.24457] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 03/25/2020] [Accepted: 03/31/2020] [Indexed: 12/14/2022]
Abstract
The viscacha (Lagostomus maximus) is a rodent of nocturnal habits, whose physiology and behavior vary according to modifications of environmental signals. The objective of this study is to assess the influence of melatonin and sexual hormones on the viscacha adrenal cortex proliferative activity through the immunohistochemical detection of proliferating cell nuclear antigen (PCNA) along with hormonal determinations. PCNA expression was studied in male viscachas to assess the effect of melatonin administration, castration, and the annual reproductive cycle. In female viscachas, PCNA was studied in nonpregnant and pregnant viscachas. PCNA expression was observed in adrenocortical cells (PCNA-A) and endothelial cells (PCNA-E). Melatonin-administered animals showed a significantly lower number of PCNA-A compared to the control group. No significant difference could be established in the number of PCNA-A and PCNA-E between castrated and control animals. However, the morphometric analysis showed an increase in the size of the cortex of castrated animals, along with other cytological features. Significant differences in serum testosterone levels were observed during the male viscacha reproductive cycle, with the lowest levels encountered during the regression period (winter). Male viscachas exhibited a significantly high number of PCNA-A during late autumn and a high number of PCNA-E during winter. In females, hormonal determinations showed a peak of progesterone and estrogen during mid-pregnancy, along with a notably high number of PCNA-A and an increase in the number of PCNA-E. Our results suggest that proliferation in the adrenal cortex of the viscacha varies in relation to melatonin, sexual hormones, and environmental conditions.
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Affiliation(s)
- Luis Ezequiel Gallol
- Cátedra de Histología, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, San Luis, 5700, Argentina.,Centro Científico Tecnológico del Consejo Nacional de Investigaciones Científicas y Técnicas, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), San Luis, 5700, Argentina
| | - Fabricio Iván Busolini
- Cátedra de Histología, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, San Luis, 5700, Argentina.,Centro Científico Tecnológico del Consejo Nacional de Investigaciones Científicas y Técnicas, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), San Luis, 5700, Argentina
| | - Fabian Heber Mohamed
- Cátedra de Histología, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, San Luis, 5700, Argentina
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3
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Flamini MA, Barreto RS, Matias GS, Birbrair A, Harumi de Castro Sasahara T, Barbeito CG, Miglino MA. Key characteristics of the ovary and uterus for reproduction with particular reference to poly ovulation in the plains viscacha (Lagostomus maximus, chinchillidae). Theriogenology 2020; 142:184-195. [DOI: 10.1016/j.theriogenology.2019.09.043] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 09/23/2019] [Accepted: 09/26/2019] [Indexed: 11/25/2022]
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4
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Rosales GJ, Perez E, Rodriguez GB, Filippa VP, Mohamed FH. Variations in the adenohypophysis of the expression of proliferating cellular nuclear antigen, oestrogen and androgen receptors in relation to gonadal steroids during pregnancy of viscachas (Lagostomus maximus maximus). Reprod Fertil Dev 2019; 31:1707-1718. [PMID: 31242958 DOI: 10.1071/rd18423] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Accepted: 05/27/2019] [Indexed: 11/23/2022] Open
Abstract
Viscachas are native rodents of South America that present a long pregnancy of ~154 days. In this work, we analysed variations in the expression of proliferating cellular nuclear antigen, oestrogen and androgen receptors (ERα and AR) in pituitary pars distalis (PD) and pars tuberalis (PT) in relation to oestradiol and testosterone serum levels in non-pregnant and pregnant viscachas. In PD, cell proliferation increased with pregnancy and lactotrophs proliferated during mid-pregnancy (MP). ERα nuclear-immunoreactive cells (ERαn-ir) were maximal in late pregnancy and AR expression did not vary during pregnancy. In PT, cell proliferation and AR expression increased during pregnancy, but ERα expression was very scarce. The immunostaining pattern of receptors was different in PD and PT. The peak of serum oestradiol and testosterone occurred during MP. Our results suggest that cell proliferation and gonadal receptors might be differentially regulated in the pituitary by oestradiol and testosterone during viscacha pregnancy.
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Affiliation(s)
- Gabriela J Rosales
- Laboratorio de Histología, Área Morfología, Departamento de Bioquímica y Ciencias Biológicas, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Avenida Ejército de los Andes 950 Bloque I Piso 1°, 5700 San Luis, Argentina; and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 5700 San Luis, Argentina
| | - Edith Perez
- Laboratorio de Histología, Área Morfología, Departamento de Bioquímica y Ciencias Biológicas, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Avenida Ejército de los Andes 950 Bloque I Piso 1°, 5700 San Luis, Argentina
| | - Graciela B Rodriguez
- Laboratorio de Parasitología, Área de Análisis Clínicos, Departamento de Bioquímica y Ciencias Biológicas, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Avenida Ejercito de los Andes 950, Bloque I, Piso 1°, 5700 San Luis, Argentina
| | - Verónica P Filippa
- Laboratorio de Histología, Área Morfología, Departamento de Bioquímica y Ciencias Biológicas, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Avenida Ejército de los Andes 950 Bloque I Piso 1°, 5700 San Luis, Argentina; and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 5700 San Luis, Argentina; and Corresponding author.
| | - Fabian H Mohamed
- Laboratorio de Histología, Área Morfología, Departamento de Bioquímica y Ciencias Biológicas, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Avenida Ejército de los Andes 950 Bloque I Piso 1°, 5700 San Luis, Argentina
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5
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Flamini MA, Barbeito CG, Portiansky EL. Morphological characteristics of the uterus and uterine cervix of the plains viscacha (
Lagostomus maximus
). ACTA ZOOL-STOCKHOLM 2019. [DOI: 10.1111/azo.12300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Mirta A. Flamini
- Laboratorio de Histología y Embriología Descriptiva, Experimental y Comparada, Facultad de Ciencias Veterinarias Universidad Nacional de La Plata La Plata Argentina
| | - Claudio G. Barbeito
- Laboratorio de Histología y Embriología Descriptiva, Experimental y Comparada, Facultad de Ciencias Veterinarias Universidad Nacional de La Plata La Plata Argentina
- Laboratorio de Análisis de Imágenes, Facultad de Ciencias Veterinarias Universidad Nacional de La Plata La Plata Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) La Plata Argentina
| | - Enrique L. Portiansky
- Laboratorio de Análisis de Imágenes, Facultad de Ciencias Veterinarias Universidad Nacional de La Plata La Plata Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) La Plata Argentina
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6
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Acuña F, Tano de la Hoz MF, Díaz AO, Portiansky EL, Barbeito CG, Flamini MA. Histochemistry of the zona pellucida of the ovary of a species with natural polyovulation: Lagostomus maximus
(Rodentia, Hystricomorpha, Chinchillidae). Reprod Domest Anim 2018; 54:207-215. [DOI: 10.1111/rda.13333] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Accepted: 08/27/2018] [Indexed: 12/17/2022]
Affiliation(s)
- Francisco Acuña
- Laboratorio de Histología y Embriología Descriptiva, Experimental y Comparada, Facultad de Ciencias Veterinarias; Universidad Nacional de La Plata (LHYEDEYC, FCV-UNLP); La Plata Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Buenos Aires Argentina
| | - María F. Tano de la Hoz
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Buenos Aires Argentina
- Instituto de Investigaciones Marinas y Costeras, Departamento de Biología, Facultad de Ciencias Naturales y Exactas; Universidad Nacional de Mar del Plata, Consejo Nacional de Investigaciones Científicas y Técnicas (IIMyC, FCEyN-UNMDP-CONICET); Mar del Plata Argentina
| | - Alcira O. Díaz
- Instituto de Investigaciones Marinas y Costeras, Departamento de Biología, Facultad de Ciencias Naturales y Exactas; Universidad Nacional de Mar del Plata, Consejo Nacional de Investigaciones Científicas y Técnicas (IIMyC, FCEyN-UNMDP-CONICET); Mar del Plata Argentina
| | - Enrique L. Portiansky
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Buenos Aires Argentina
- Laboratorio de Análisis de Imágenes, Facultad de Ciencias Veterinarias; Universidad Nacional de La Plata (LAI, FCV-UNLP); La Plata Argentina
| | - Claudio G. Barbeito
- Laboratorio de Histología y Embriología Descriptiva, Experimental y Comparada, Facultad de Ciencias Veterinarias; Universidad Nacional de La Plata (LHYEDEYC, FCV-UNLP); La Plata Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Buenos Aires Argentina
| | - Mirta A. Flamini
- Laboratorio de Histología y Embriología Descriptiva, Experimental y Comparada, Facultad de Ciencias Veterinarias; Universidad Nacional de La Plata (LHYEDEYC, FCV-UNLP); La Plata Argentina
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Santos EA, Lima GL, Praxedes EC, Silva AM, Maia KM, Oliveira MF, Rodrigues APR, Silva AR. Estimation, morphometry and ultrastructure of ovarian preantral follicle population in agouti (Dasyprocta leporina). PESQUISA VETERINARIA BRASILEIRA 2018. [DOI: 10.1590/1678-5150-pvb-4946] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
ABSTRACT: The aim of this study was to characterize the preantral ovarian follicular population in agoutis (D. leporina) by estimating the number of follicles at each developmental category, and also describe the morphometry and the specific features of the follicle and the oocyte by using light and transmission electron microscopy. The length of each ovary was measured using a caliper rule, longitudinally sectioned into two halves and both were immediately fixed to perform the estimation of follicular population and ultrastructural analysis. The mean (±S.E.M.) population of follicular per pair of ovary was estimated at 4419.8±532.26 and 5397.52±574.91 for right and left ovaries, respectively, but no differences were observed between them. The diameters for follicles, oocyte and nuclei were: 18.62±3.40μm, 12.28±2.37μm and 6.10±0.93μm for primordial, 23.75±5.70μm, 14.22±3.00μm and 6.70±1.24μm for primary and 88.55±17.61μm, 52.85±17.56μm and 22.33±17.61μm for secondary follicles, respectively. The most of the follicles found belonged to the primordial category (86.63%), followed by primary (13.01%) and secondary (0.35%) one. Additionally, polyovular follicles were observed in all the animals and they represented 7.51% of the total follicles counted. The ultrastructural analysis showed that the oocyte presented a central and regular nuclei, displaying a homogenous mass. Among the organelles, the mitochondria were the most abundant and the oocyte Golgi apparatus was rarely observed. In conclusion, this work shows for the first time the characterization of the population of preantral follicles in the ovary of Dasyprocta leporina. Those information will be useful for further development and adaptation of biotechniques such as germplasm cryopreservation and in vitro gametes manipulation.
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8
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Fraunhoffer NA, Jensen F, Leopardo N, Inserra PIF, Abuelafia AM, Espinosa MB, Charif SE, Dorfman VB, Vitullo AD. Hormonal behavior correlates with follicular recruitment at mid-gestation in the South American plains vizcacha, Lagostomus maximus (Rodentia, Caviomorpha). Gen Comp Endocrinol 2017. [PMID: 28645634 DOI: 10.1016/j.ygcen.2017.06.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
In mammals, hormonal regulation during gestation is crucial for embryo implantation and pregnancy success. This regulation is controlled through the level of progesterone (P4) that blocks the activity of the hypothalamic-hypophyseal-gonadal (HHG) axis. Previous studies in the pregnant South American plains vizcacha, Lagostomus maximus, have shown that the HHG axis activates around mid-gestation, promoting pre-ovulatory follicle formation. However, the characterization of the hormonal dynamics throughout gestation and its ovarian correlation has not been studied in depth. We studied the ovarian dynamics of L. maximus and its correlation with the hormonal profile during gestation, analyzing serum levels of P4, 17β-estradiol (E2), 4Δ-androstenedione (A4), luteinizing hormone (LH) and follicle stimulating hormone (FSH) as well as the ovarian distribution and expression of their receptors. Additionally, we have analyzed the folliculogenesis and accessory corpora lutea (ACL) formation. P4 showed two concentration peaks reaching its highest level at mid-gestation decreasing at 91-100days post-coitum. P4 decrease is followed by an increase of circulating levels of A4, E2, FSH and LH and with an elevated number of antral/pre-ovulatory follicles which express PGR, ESR1, ESR2, AR, LHR and FSHR. In addition, ACL with oocyte retention and cytoplasmic lipid droplets in luteal cells were detected at this time point. These results show that in L. maximus the decrease of P4 level from mid-gestation enables follicular recruitment until pre-ovulatory stage and the development of functional ACL.
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Affiliation(s)
- Nicolas Alejandro Fraunhoffer
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina.
| | - Federico Jensen
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - Noelia Leopardo
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - Pablo Ignacio Felipe Inserra
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - Analía Meilerman Abuelafia
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina
| | - María Beatriz Espinosa
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - Santiago Elías Charif
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - Verónica Berta Dorfman
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - Alfredo Daniel Vitullo
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Ciudad Autónoma de Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina.
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9
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Busolini FI, Rodríguez GB, Filippa VP, Mohamed FH. Pigmented Cells in the Pineal Gland of Female Viscacha ( Lagostomus maximus maximus): A Histochemical and Ultrastructural Study. Int J Endocrinol 2017; 2017:7492960. [PMID: 29391866 PMCID: PMC5748126 DOI: 10.1155/2017/7492960] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Accepted: 11/09/2017] [Indexed: 11/27/2022] Open
Abstract
The presence of pigment has been demonstrated in different nervous structures such as those of retina, substantia nigra, and locus coeruleus. These pigments have also been described in the pineal gland of different mammal species. Histochemical and ultrastructural studies of the pineal gland of female viscacha (Lagostomus maximus maximus) were performed to analyze the presence of pigmented cells under natural conditions and to evaluate a probable relation between pigment content and glandular activity during pregnancy. The following techniques were applied: hematoxylin-eosin, phosphotungstic acid-hematoxylin, Masson-Fontana silver, DOPA histochemistry, Schmorl's reaction and toluidine blue. Estradiol and progesterone serum levels were determined by RIA. The ultrastructural features of the pineal pigment granules were also analyzed. Pigment granules were observed in a random distribution, but the pigmented cells were frequently found near blood vessels. The pineal pigment was histochemically identified as melanin. Differences in the amount of pigmented cells were found between pregnant and nonpregnant viscachas. The ultrastructural analysis revealed the presence of premelanosomes and melanosomes. Estradiol and progesterone levels vary during pregnancy. In conclusion, the changes in the amount of pigment content and hormone levels may indicate that the pineal gland of female viscacha is susceptible to endocrine variations during pregnancy.
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Affiliation(s)
- Fabricio Ivan Busolini
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 5700 San Luis, Argentina
- Histología, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Avenida Ejercito de los Andes 950, Bloque I, Piso No. 1, 5700 San Luis, Argentina
| | - Graciela Beatriz Rodríguez
- Parasitología, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Avenida Ejercito de los Andes 950, Bloque I, Piso No. 1, 5700 San Luis, Argentina
| | - Verónica Palmira Filippa
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), 5700 San Luis, Argentina
- Histología, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Avenida Ejercito de los Andes 950, Bloque I, Piso No. 1, 5700 San Luis, Argentina
| | - Fabian Heber Mohamed
- Histología, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Avenida Ejercito de los Andes 950, Bloque I, Piso No. 1, 5700 San Luis, Argentina
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10
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Rosales GJ, Busolini FI, Mohamed FH, Filippa VP. Effects of melatonin and gonadal androgens on cell proliferation in the pituitary of viscachas (Lagostomus maximus maximus). Cell Prolif 2016; 49:644-53. [PMID: 27484731 DOI: 10.1111/cpr.12280] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Accepted: 07/01/2016] [Indexed: 01/21/2023] Open
Abstract
OBJECTIVES Melatonin and androgens are involved in the regulation of cell proliferation. However, effects of these hormones on pituitary pars distalis (PD) of male viscachas is not fully understood. In the present study, we analysed melatonin and gonadal androgens' effects on proliferating cell nuclear antigen (PCNA) expression. MATERIALS AND METHODS Pituitary glands from foetuses, immature individuals, prepubertal individuals and adult viscachas during their reproductive cycle, after melatonin administration and after castration, were used. PCNA-ir cells were detected by immunocytochemistry and morphometrically quantified using image analysis. RESULTS Total percentage of PCNA-ir cells varied seasonally in the adult pituitary, with maximum values during the reproductive period and minima during gonadal regression periods. Percentages of PCNA-ir cells increased after melatonin administration, whereas it decreased after castration. Caudal end and ventral regions were the PD zones which were most affected by seasonal variations and castration. PCNA expression was highest in foetal pituitary from midpregnancy. Numbers of PCNA-ir cells decreased during sexual maturity. CONCLUSIONS Our results demonstrate the effect of gonadal androgens on cell proliferation during the reproductive period and sexual maturity of these animals. Exogenous melatonin increased PD cell proliferation in adults. Thus, these hormones seem to be involved in different mechanisms that regulate cell renewal of PD in this seasonally breeding rodent.
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Affiliation(s)
- G J Rosales
- Laboratorio de Histología, Área Morfología, Departamento de Bioquímica y Ciencias Biológicas, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, 5700, San Luis, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - F I Busolini
- Laboratorio de Histología, Área Morfología, Departamento de Bioquímica y Ciencias Biológicas, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, 5700, San Luis, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - F H Mohamed
- Laboratorio de Histología, Área Morfología, Departamento de Bioquímica y Ciencias Biológicas, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, 5700, San Luis, Argentina
| | - V P Filippa
- Laboratorio de Histología, Área Morfología, Departamento de Bioquímica y Ciencias Biológicas, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, 5700, San Luis, Argentina. .,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina.
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11
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Histology of the ovary of Chinchilla lanigera in captivity. Anim Reprod Sci 2014; 148:205-11. [DOI: 10.1016/j.anireprosci.2014.05.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Revised: 05/05/2014] [Accepted: 05/10/2014] [Indexed: 11/19/2022]
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12
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Flamini MA, Barbeito CG, Portiansky EL. A morphological, morphometric and histochemical study of the oviduct in pregnant and non-pregnant females of the plains viscacha (Lagostomus maximus). ACTA ZOOL-STOCKHOLM 2012. [DOI: 10.1111/azo.12018] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mirta A. Flamini
- Department of Histology and Embryology; School of Veterinary Sciences; National University of La Plata; P.O. Box 296 1900 La Plata Argentina
| | - Claudio G. Barbeito
- Department of Histology and Embryology; School of Veterinary Sciences; National University of La Plata; P.O. Box 296 1900 La Plata Argentina
- Institute of Pathology; School of Veterinary Sciences; National University of La Plata; P.O. Box 296 1900 La Plata Argentina
| | - Enrique L. Portiansky
- Institute of Pathology; School of Veterinary Sciences; National University of La Plata; P.O. Box 296 1900 La Plata Argentina
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Acosta M, Mohamed F. Immunohistochemical and morphometric study of pituitary pars distalis folliculostellate cells of nonpregnant and pregnant viscachas. Biotech Histochem 2012; 88:161-9. [PMID: 23244236 DOI: 10.3109/10520295.2012.750737] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Pituitary folliculostellate cells (FSC) have several functions. Morphological, immunohistochemical and physiological characteristics of these cells have been reported for many mammalian species. There is little information, however, about the effect of pregnancy on FSC, particularly in wild animals. We conducted an immunohistochemical and morphometric study of the effect of pregnancy on FSC in viscacha, a seasonal breeder with a long gestation period. Immunohistochemistry and image analysis were used to measure the percentages of S-100-positive total, cellular, and colloidal areas and the number of FSC. In all groups studied, FSC were either isolated or arranged in small groups. These cells exhibited irregular nuclei, stellate shape, and cytoplasmic processes that delimited the follicles or contacted blood vessels. They expressed S-100 protein, which was localized both intracellularly (FSC) and extracellularly (follicular colloid). Some FSC were immunostained by anti-GFAP or anti-vimentin in the cytoplasm surrounding the nucleus and in the cytoplasmic processes, respectively. Morphometric parameters showed variation between nonpregnant and pregnant females. These variations were greatest during mid-pregnancy. We demonstrated that distribution of the FSC in pituitary pars distalis and expression of S-100 protein differ in nonpregnant and pregnant viscachas. Our findings suggest that FSC are involved in intrapituitary regulation of the hormone-secreting cells during pregnancy, probably by a paracrine mechanism.
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Affiliation(s)
- M Acosta
- Histology Laboratory, Faculty of Chemistry, Biochemistry and Pharmacy, National University of San Luis , Ejército de los Andes Avenue 950, D5700HHW San Luis , Argentina
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Tano de la Hoz MF, Flamini MA, Díaz AO. Histological and histochemical study of the duodenum of the plains viscacha (Lagostomus maximus) at different stages of its ontogenetic development. ACTA ZOOL-STOCKHOLM 2012. [DOI: 10.1111/j.1463-6395.2012.00577.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- María Florencia Tano de la Hoz
- Comisión de Investigaciones Científicas de la Provincia de Buenos Aires (CIC) Buenos Aires Argentina
- Instituto de Investigaciones Marinas y Costeras (IIMyC) Departamento de Biología, FCEyN, CONICET‐Universidad Nacional de Mar del Plata Funes 3250 3° piso 7600 Mar del Plata Buenos Aires Argentina
| | - Mirta Alicia Flamini
- Departamento de Histología y Embriología, Facultad de Ciencias Veterinarias Universidad Nacional de La Plata La Plata Argentina
| | - Alcira Ofelia Díaz
- Instituto de Investigaciones Marinas y Costeras (IIMyC) Departamento de Biología, FCEyN, CONICET‐Universidad Nacional de Mar del Plata Funes 3250 3° piso 7600 Mar del Plata Buenos Aires Argentina
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15
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Flamini M, Portiansky E, Favaron P, Martins D, Ambrósio C, Mess A, Miglino M, Barbeito C. Chorioallantoic and yolk sac placentation in the plains viscacha (Lagostomus maximus) – A caviomorph rodent with natural polyovulation. Placenta 2011; 32:963-8. [DOI: 10.1016/j.placenta.2011.09.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2011] [Revised: 08/03/2011] [Accepted: 09/04/2011] [Indexed: 10/17/2022]
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16
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Flamini MA, Díaz AO, Barbeito CG, Portiansky EL. Morphology, morphometry, histochemistry and lectin histochemistry of the vagina of the plains viscacha (Lagostomus maximus). Biotech Histochem 2011; 87:81-94. [DOI: 10.3109/10520295.2010.518497] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- MA Flamini
- Department of Histology and Embryology, School of Veterinary Sciences, National University of La Plata
| | - AO Díaz
- Department of Biology, School of Exact and Natural Sciences, National University of Mar del Plata
| | - CG Barbeito
- Department of Histology and Embryology, School of Veterinary Sciences, National University of La Plata
- Department of Biology, School of Exact and Natural Sciences, National University of Mar del Plata
- Institute of Pathology, School of Veterinary Sciences, National University of La Plata,
Buenos Aires, Argentina
| | - EL Portiansky
- Institute of Pathology, School of Veterinary Sciences, National University of La Plata,
Buenos Aires, Argentina
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Filippa V, Mohamed F. The pituitary of non-pregnant and pregnant viscachas (Lagostomus maximus maximus): a comparative study by immunohistochemistry and morphometric analysis. ZOOLOGY 2010; 113:361-72. [PMID: 20970970 DOI: 10.1016/j.zool.2010.08.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2010] [Revised: 07/14/2010] [Accepted: 08/12/2010] [Indexed: 10/18/2022]
Abstract
The neuroendocrine hypothalamic-pituitary axis undergoes morphological and biochemical changes throughout gestation. In viscacha, pregnancy lasts approximately 154 days, and three stages can be described: early, mid- and late pregnancy. The aim of this work was to study the pituitary LH-gonadotrophs, FSH-gonadotrophs, somatotrophs, corticotrophs and thyrotrophs of non-pregnant and pregnant adult viscachas by immunohistochemistry and morphometric analysis. Immunopositive percentage area (%IA), cell percentage in the pars distalis (%PDC), number of cells per reference area (n°cell/RA), and major cellular (MCD) and nuclear (ND) diameters were analyzed. The different cell populations showed a well-defined morphology, immunolabeling patterns and regionalization in the pars distalis (PD). In the early pregnancy of animals the morphometric analysis demonstrated that %IA, %PDC and n°cell/RA increased in the FSH-gonadotrophs and decreased in the somatotrophs in relation to non-pregnant animals. In mid-pregnancy, there was an increase in %IA, %PDC, and n°cell/RA of LH-gonadotrophs, FSH-gonadotrophs, somatotrophs, and thyrotrophs. The MCD of LH-gonadotrophs and FSH-gonadotrophs increased. In late pregnancy, the %IA, %PDC and n°cell/RA of LH-gonadotrophs, FSH-gonadotrophs, somatotrophs and corticotrophs decreased whereas the values of the thyrotrophs remained constant. The MCD of LH-gonadotrophs, FSH-gonadotrophs and corticotrophs decreased. No significant changes were observed in the ND of the studied cell types. In conclusion, this work provides evidence for histological and morphometric changes in the different cell types of the pituitary PD in viscachas during pregnancy, probably according to the requirements of this physiological stage.
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Affiliation(s)
- Verónica Filippa
- Cátedra de Histología, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Av. Ejército de los Andes 950-Bloque I, 1° Piso, 5700 San Luis, Argentina
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Flamini MA, Barbeito CG, Gimeno EJ, Portiansky EL. Histology, histochemistry and morphometry of the ovary of the adult plains viscacha (Lagostomus maximus) in different reproductive stages. ACTA ZOOL-STOCKHOLM 2009. [DOI: 10.1111/j.1463-6395.2008.00386.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Jensen F, Willis MA, Leopardo NP, Espinosa MB, Vitullo AD. The Ovary of the Gestating South American Plains Vizcacha (Lagostomus maximus): Suppressed Apoptosis and Corpora Lutea Persistence1. Biol Reprod 2008; 79:240-6. [DOI: 10.1095/biolreprod.107.065326] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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