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Guerra LHA, Campos SGP, Taboga SR, Vilamaior PSL. Prostatic morphological changes throughout life: Cytochemistry as a tool to reveal tissue aging markers. Microsc Res Tech 2024; 87:1020-1030. [PMID: 38186358 DOI: 10.1002/jemt.24489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 11/29/2023] [Accepted: 12/20/2023] [Indexed: 01/09/2024]
Abstract
The prostate undergoes normal or pathological morphological changes throughout life. An understanding of these changes is fundamental for the comprehension of aging-related pathological processes such as benign prostatic hyperplasia (BPH) and cancer. In the present study, we show some of these morphological changes, as well as histochemical techniques like Weigert's resorcin-fuchsin method, Picrosirius Red, and Gömöri's reticulin for use as tools in the study of prostate tissue under light microscopy. For this purpose, prostates of the Mongolian gerbil (n = 9), an experimental model that develops BPH spontaneously, were analyzed at three life stages: young (1 month old), adult (3 months old), and old (15 months old). The results showed that fibrillar components such as collagen, and reticular and elastic fibers, change throughout life. In young animals, the prostate has cuboidal epithelium surrounded by thin layers of smooth muscle, continuous collagen fibers, winding reticular fibers, and sporadic elastic fibers. With adulthood, the epithelium becomes columnar, encircled by compacted muscle cells among slender collagen fibers, elongated reticular fibers, and linear elastic fibers. In aging individuals, the prostate's epithelium stratifies, surrounded by thick muscle layers among dense collagen fibers, disordered reticular fibers, and elastic fibers in different planes. We also identified a few accumulations of lipid droplets and lipofuscin granules in adult animals and high accumulation in old animals evidenced by Oil red O and Gömöri-Halmi techniques, respectively. The histochemical techniques presented here have been demonstrated to be useful and accessible tools in prostate studies. RESEARCH HIGHLIGHTS: Cytochemical techniques to study prostate morphology. The prostate changes with age.
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Affiliation(s)
- Luiz Henrique Alves Guerra
- Department of Biology, Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University - UNESP, São José do Rio Preto, São Paulo, Brazil
| | - Silvana Gisele Pegorin Campos
- Department of Biology, Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University - UNESP, São José do Rio Preto, São Paulo, Brazil
| | - Sebastião Roberto Taboga
- Department of Biology, Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University - UNESP, São José do Rio Preto, São Paulo, Brazil
- Department of Functional and Structural Biology, Institute of Biology, University of Campinas - UNICAMP, Campinas, São Paulo, Brazil
| | - Patricia Simone Leite Vilamaior
- Department of Biology, Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University - UNESP, São José do Rio Preto, São Paulo, Brazil
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Castro NFDC, Jubilato FC, Guerra LHA, Santos FCAD, Taboga SR, Vilamaior PSL. Therapeutic effects of β-caryophyllene on proliferative disorders and inflammation of the gerbil prostate. Prostate 2021; 81:812-824. [PMID: 34125438 DOI: 10.1002/pros.24177] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 05/12/2021] [Accepted: 05/26/2021] [Indexed: 01/07/2023]
Abstract
BACKGROUND The prostate is susceptible to changes in androgen levels, which can play an important role in the development of Benign Prostatic Hyperplasia (BPH). Natural compounds have beneficial properties for organisms and can be an important therapeutic strategy in the treatment of diseases. β-Caryophyllene (BCP) is a phytocannabinoid present in several medicinal and food plants species and has shown beneficial effects in different organs. However, little is known about its effects on the prostate. The present study seeks to evaluate the effects of exposure to BCP on the morphophysiology of the ventral prostate of adult gerbils supplemented with testosterone. METHODS Animals were distributed into four groups (n = 8/group): Intact control (C); β-Caryophyllene (BCP): β-Caryophyllene (50 mg/kg/day); Testosterone (T): animals received subcutaneous injections of Testosterone Cypionate (3 mg/Kg), on alternate days, for one month and were euthanized 30 days supplementation ended; Testosterone and β-Caryophyllene (TBCP): animals were exposed to testosterone cypionate (3 mg/Kg) to induce hyperplastic alterations followed by daily BCP (50 mg/kg). Morphological, biometric, immunohistochemical, and serological analyses were performed. RESULTS Proliferative disorders and inflammatory foci were present in the ventral prostate of all experimental groups. An increase in the multiplicity of benign intraepithelial neoplasm and subepithelial inflammatory foci was observed in T group. The incidence of intraluminal inflammatory foci and microinvasive carcinoma was verified only in the T group. Cellular rearrangement and tissue remodeling occurred in the prostate of groups exposed to phytocannabinoids. A reduction was observed in the frequency of PHH3 and Cox2 markers in the prostatic epithelium of TBCP in comparison with T. A decrease in F4/80 and CD163 positive macrophages were also observed in the prostatic stroma of the TBCP group in comparison with T. The results suggest that BCP had favorable effects on BPH, reducing the proliferation and frequency of some inflammatory cells. CONCLUSION BCP impacts the tissue remodeling process in the premalignant prostate environment and that the use of this phytocannabinoid can have a promising effect in the handling of BPH.
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Affiliation(s)
- Nayara Fernanda da Costa Castro
- Department of Biology, Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University (UNESP), São José do Rio Preto, São Paulo, Brazil
| | - Fernanda Costa Jubilato
- Department of Biology, Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University (UNESP), São José do Rio Preto, São Paulo, Brazil
| | - Luiz Henrique Alves Guerra
- Department of Biology, Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University (UNESP), São José do Rio Preto, São Paulo, Brazil
| | | | - Sebastião Roberto Taboga
- Department of Biology, Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University (UNESP), São José do Rio Preto, São Paulo, Brazil
| | - Patrícia Simone Leite Vilamaior
- Department of Biology, Institute of Biosciences, Humanities and Exact Sciences, São Paulo State University (UNESP), São José do Rio Preto, São Paulo, Brazil
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Zanatelli M, Colleta SJ, Guerra LHA, Santos FCA, Góes RM, Vilamaior PSL, Taboga SR. Prolactin promotes a partial recovery from the atrophy of both male and female gerbil prostates caused by castration. Reprod Biol Endocrinol 2021; 19:94. [PMID: 34158080 PMCID: PMC8218528 DOI: 10.1186/s12958-021-00777-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 06/03/2021] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND The male and female prostates are controlled by steroid hormones, suffering important morphological and physiological changes after castration. Prolactin is involved in the regulation of the male prostate, having already been identified in the tissue, acting through its receptor PRLR. In the Mongolian gerbil, in addition to the male prostate, the female prostate is also well developed and active in its secretion processes. The aim of the present study was to evaluate the effects of exposure to exogenous prolactin in the prostate of both intact and castrated male and female gerbils in order to establish if prolactin administration can sustain prostate cell activity in conditions of sexual hormone deprivation. METHODS The morphological analyses were performed by biometric analysis, lesion histological analysis and morphometric-stereological aspects. In addition, immune-cytochemical tests were performed for prolactin and its receptor, as well as for the receptors of androgen and oestrogen and serum prolactin dosage. All data were submitted to ANOVA or Kruskal-Wallis tests for comparison between groups. P < 0.05 was considered to be statistically significant. RESULTS The results showed a strong influence of prolactin on the morphology of the prostate, with the development of important epithelial alterations, after only 3 days of administration, and an expressive epithelial cell discard process after 30 days of administration. Prolactin acts in synergy with testosterone in males and mainly with oestrogens in females, establishing different steroid hormonal receptor immunoreactivity according to sex. It was also demonstrated that prolactin can assist in the recovery from some atrophic effects caused in the gland after castration, without causing additional tissue damage. CONCLUSIONS The prolactin and its receptor are involved in the maintenance of the homeostasis of male and female gerbils, and also cause distinct histological alterations after exogenous exposure for 3 and 30 days. The effects of prolactin are related to its joint action on androgens and oestrogens and it can also assist in the recovery from the atrophic effects of castration.
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Affiliation(s)
- Marianna Zanatelli
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas - UNICAMP, SP, Campinas, Brazil
| | - Simone Jacovaci Colleta
- Laboratory of Microscopy and Microanalysis, Department of Biology, São Paulo State University - UNESP/IBILCE, Rua Cristóvão Colombo, 2265, Jardim Nazareth, SP, 15054-000, São José do Rio Preto, Brasil
| | - Luiz Henrique Alves Guerra
- Laboratory of Microscopy and Microanalysis, Department of Biology, São Paulo State University - UNESP/IBILCE, Rua Cristóvão Colombo, 2265, Jardim Nazareth, SP, 15054-000, São José do Rio Preto, Brasil
| | | | - Rejane Maira Góes
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas - UNICAMP, SP, Campinas, Brazil
- Laboratory of Microscopy and Microanalysis, Department of Biology, São Paulo State University - UNESP/IBILCE, Rua Cristóvão Colombo, 2265, Jardim Nazareth, SP, 15054-000, São José do Rio Preto, Brasil
| | - Patricia Simone Leite Vilamaior
- Laboratory of Microscopy and Microanalysis, Department of Biology, São Paulo State University - UNESP/IBILCE, Rua Cristóvão Colombo, 2265, Jardim Nazareth, SP, 15054-000, São José do Rio Preto, Brasil
| | - Sebastião Roberto Taboga
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas - UNICAMP, SP, Campinas, Brazil.
- Laboratory of Microscopy and Microanalysis, Department of Biology, São Paulo State University - UNESP/IBILCE, Rua Cristóvão Colombo, 2265, Jardim Nazareth, SP, 15054-000, São José do Rio Preto, Brasil.
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Osório DA, Consonni SR, Dos Santos AM, Carvalho HF. Fibrin and Transforming Growth Factor Alpha Affect Prostatic Smooth Muscle Cell's Phenotype and Motility. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2021; 27:1-8. [PMID: 33691831 DOI: 10.1017/s1431927621000209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Smooth muscle cells (SMCs) are dynamic and transition from a contractile to a synthetic phenotype under different circumstances. Plasma factors (fibrin and transforming growth factors, TGFs) are possible components affecting SMCs differentiation and behavior. Thus, the objective of this work was to investigate how the fibrin matrix and TGFs affect SMCs differentiation and motility behavior. SMCs invaded the fibrin gel and adopted a stellate phenotype while reducing the expression of differentiation markers (Acta2, Myh11, and Smtn). At the ultrastructural level, SMCs did not assemble a basal lamina and showed numerous blebs along the entire cell surface. This transition was not associated with changes in focal adhesion kinase (FAK) content and phosphorylation status but reflected a marked change in FAK distribution in the cytoplasm. After 48 h in culture, SMCs caused an active degradation of the fibrin gel. Additionally, we tested the SMCs response to TGFs in a cell layer wound repair assay. TGFα, but not TGFβ1 or TGFβ3, had significantly increased motility. In conclusion, prostatic SMCs present a phenotypical transition when cultured on fibrin, adopting a micro-blebbing based motility behavior and increasing migration in response to TGFα.
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Affiliation(s)
- Daniel A Osório
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Silvio R Consonni
- Department of Biochemistry and Tissue Biology, Institute of Biology, State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Aline M Dos Santos
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas (UNICAMP), Campinas, SP, Brazil
- National Institute of Photonics Applied to Cell Biology, State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Hernandes F Carvalho
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas (UNICAMP), Campinas, SP, Brazil
- National Institute of Photonics Applied to Cell Biology, State University of Campinas (UNICAMP), Campinas, SP, Brazil
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5
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da Rocha ES, Gomes FDC, de Oliveira MR, Bruneto RV, Borges RMR, de Carvalho EP, Angeli-Junior EV, Garcia-Filho GF, Doná JPL, de Oliveira Batanero RP, Carlos CP, de Melo-Neto JS. Effects of adjuvant-induced arthritis on the ventral prostate of rats treated with angiotensin AT 1 receptor blocker. Life Sci 2020; 252:117629. [PMID: 32247619 DOI: 10.1016/j.lfs.2020.117629] [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: 10/22/2019] [Revised: 03/30/2020] [Accepted: 03/31/2020] [Indexed: 01/18/2023]
Abstract
AIMS To analyze the prostatic compartments, extracellular matrix, microvascularization, transforming growth factor-beta (TGF-β) and angiotensin II receptors type 1 (AT1) levels, and histopathology of the ventral prostate in a rat model for rheumatoid arthritis, and to evaluate the effect of angiotensin II AT1 receptor blocker (ARB) in the disease. MAIN METHODS Fifteen male rats (90 days old) were divided into three groups (n = 5/group): control, adjuvant-induced arthritis without (AIA) or with AT1 receptor blocker (AIA + ARB). Animals were euthanized 60 days after immunization. The ventral prostate was collected, weighed, and processed for histological and immunohistochemical analysis. KEY FINDINGS Our results show that AIA increases production of the prostatic epithelium and extracellular matrix, accompanied by a reduction in the number of tissue capillaries. ARB treatment promotes decreased production of extracellular matrix and increased TGF-β and AT1 receptor immunostaining. SIGNIFICANCE AIA may activate specific mechanisms that modify the prostatic environment; the use of ARB attenuates some altered prostate parameters in a rat model for arthritis.
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Affiliation(s)
| | - Fabiana de Campos Gomes
- Genetics and Molecular Biology Research Unit (UPGEM), São José do Rio Preto Medical School (FAMERP), São José do Rio Preto, SP, Brazil
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6
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Castro NFC, Falleiros‐Júnior LR, Zucão MI, Perez APS, Taboga SR, Santos FCA, Vilamaior PSL. Ethinylestradiol and its effects on the macrophages in the prostate of adult and senile gerbils. Cell Biol Int 2020; 44:1467-1480. [DOI: 10.1002/cbin.11342] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Accepted: 03/14/2020] [Indexed: 12/15/2022]
Affiliation(s)
- Nayara F. C. Castro
- Department of Biology, Institute of Biosciences, Letters and Exact SciencesSão Paulo State University Rua Cristóvão Colombo, 2265 São José do Rio Preto São Paulo Brazil
| | - Luiz R. Falleiros‐Júnior
- Department of Biology, Institute of Biosciences, Letters and Exact SciencesSão Paulo State University Rua Cristóvão Colombo, 2265 São José do Rio Preto São Paulo Brazil
| | - Mariele I. Zucão
- Department of Biology, Institute of Biosciences, Letters and Exact SciencesSão Paulo State University Rua Cristóvão Colombo, 2265 São José do Rio Preto São Paulo Brazil
| | - Ana P. S. Perez
- Special Academic Unit of Health Sciences, Medicine CourseFederal University of Goiás Rodovia BR‐364 Km 195, 3800 Jataí Goiás Brazil
| | - Sebastião R. Taboga
- Department of Biology, Institute of Biosciences, Letters and Exact SciencesSão Paulo State University Rua Cristóvão Colombo, 2265 São José do Rio Preto São Paulo Brazil
| | - Fernanda C. A. Santos
- Department of MorphologyFederal University of Goiás Campus II, Samambaia Goiânia Goiás Brazil
| | - Patrícia S. L. Vilamaior
- Department of Biology, Institute of Biosciences, Letters and Exact SciencesSão Paulo State University Rua Cristóvão Colombo, 2265 São José do Rio Preto São Paulo Brazil
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Nishan U, da Rosa-Ribeiro R, Damas-Souza DM, Barbosa GO, Carvalho HF. Transcriptional regulators and regulatory pathways involved in prostate gland adaptation to a hypoandrogen environment. Genet Mol Biol 2020; 42:e20180362. [PMID: 32159609 PMCID: PMC7198032 DOI: 10.1590/1678-4685-gmb-2018-0362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Accepted: 09/03/2019] [Indexed: 11/21/2022] Open
Abstract
Anti-androgen therapies, including orchiectomy, are effective at promoting
prostate cancer remission, but are followed by progression to the more
aggressive castration-resistant prostate cancer (CRPC). Castration promotes
gland and tumor shrinkage. However, prostate adaptation to androgen deprivation
involves striking parallel events, all requiring changes in gene expression. We
hypothesized that transcription factors (TF) and other transcription-related
genes are needed to orchestrate those changes. In this work, downstream analysis
using bioinformatic tools and published microarray data allowed us to identify
sixty transcriptional regulators (including 10 TF) and to integrate their
function in physiologically relevant networks. Functional associations revealed
a connection between Arnt, Bhlhe41 and
Dbp circadian rhythm genes with the Ar
circuitry and a small gene network centered in Pex14, which might indicate a
previously unanticipated metabolic shift. We have also identified human homologs
and mapped the corresponding genes to human chromosome regions commonly affected
in prostate cancer, with particular attention to the
PTEN/HHEX/MXI1 cluster at
10q23-25 (frequently deleted in PCa) and to MAPK1 at 22q11.21 (delete in
intermediate risk but not in high risk PCa). Twenty genes were found mutated or
with copy number alterations in at least five percent of three cancer cohorts
and six of them (PHOX2A, NFYC, EST2, EIF2S1, SSRP1 and PARP1) associated with
impacted patient survival. These changes are specific to the adaptation to the
hypoandrogen environment and seem important for the progression to CRPC when
mutated.
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Affiliation(s)
- Umar Nishan
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade de Campinas (UNICAMP), Campinas, SP, Brazil
| | - Rafaela da Rosa-Ribeiro
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade de Campinas (UNICAMP), Campinas, SP, Brazil
| | - Danilo Marchete Damas-Souza
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade de Campinas (UNICAMP), Campinas, SP, Brazil
| | - Guilherme Oliveira Barbosa
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade de Campinas (UNICAMP), Campinas, SP, Brazil
| | - Hernandes F Carvalho
- Departamento de Biologia Estrutural e Funcional, Instituto de Biologia, Universidade de Campinas (UNICAMP), Campinas, SP, Brazil
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8
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Santos CR, Benjamin ACA, Chies AB, Domeniconi RF, Zochio GP, Spadella MA. Adjuvant‐induced arthritis affects testes and ventral prostate of
Wistar
rats. Andrology 2019; 8:473-485. [DOI: 10.1111/andr.12693] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2019] [Revised: 06/26/2019] [Accepted: 07/16/2019] [Indexed: 01/02/2023]
Affiliation(s)
- C. R. Santos
- Master's Program in Health and Aging Marília Medical School Marília SP Brazil
| | - A. C. A. Benjamin
- Undergraduate Program in Medicine Marília Medical School Marília SP Brazil
| | - A. B. Chies
- Laboratory of Pharmacology Marília Medical School Marília SP Brazil
| | - R. F. Domeniconi
- Department of Anatomy Institute of Biosciences ‐ UNESPBotucatu SP Brazil
| | - G. P. Zochio
- Department of Pharmacology Institute of Biosciences ‐ UNESPBotucatu SP Brazil
| | - M. A. Spadella
- Human Embryology Laboratory Marília Medical School Marília SP Brazil
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Della-Colleta HHM, Carvalho HF. Hyaluronan content and distribution in the rat ventral prostate after castration. Biochem Cell Biol 2018. [PMID: 29533730 DOI: 10.1139/bcb-2017-0242] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Hyaluronan (HA) has been implicated in tissue remodeling, healing, and tumor growth. This study investigated the variation in hyaluronan content, distribution, and metabolism in the rat ventral prostate (VP) in response to androgen deprivation after castration. The mRNA abundance of hyaluronan synthases (Has1-3) and hyaluronidases (Hyal 1-3) were assessed by reverse transcription (RT)-PCR and immunohistochemistry, respectively. The results demonstrated an increased concentration, but an overall reduction in HA content. HA was located in both epithelium and stroma of the prostate of both the noncastrated and castrated animals. Quantitative RT-PCR (qRT-PCR) showed that Has1 and Has2 are major synthases, and that Hyal 1 was the predominant hydrolase expressed in the VP. qRT-PCR also showed that Has1 and Has2 mRNA increased transiently after castration, whereas Has3 mRNA declined markedly. While Hyal 1 mRNA increased slowly up to day 21 after castration, Hyal 2 and Hyal 3 mRNA dropped significantly. CD44 was found in the epithelial cells and in some stromal cells in both hormonal conditions. In conclusion, castration results in increased abundance of Has1 and Has2 mRNA, but is associated with a decrease in the total content of HA, with an increased concentration, and a predominance of short-chain HA molecules.
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Affiliation(s)
- Heloisa H M Della-Colleta
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas - UNICAMP, Campinas, São Paulo, Brazil.,Department of Structural and Functional Biology, Institute of Biology, State University of Campinas - UNICAMP, Campinas, São Paulo, Brazil
| | - Hernandes F Carvalho
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas - UNICAMP, Campinas, São Paulo, Brazil.,Department of Structural and Functional Biology, Institute of Biology, State University of Campinas - UNICAMP, Campinas, São Paulo, Brazil
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10
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Pathological lesions and global DNA methylation in rat prostate under streptozotocin-induced diabetes and melatonin supplementation. Cell Biol Int 2018; 42:470-487. [DOI: 10.1002/cbin.10920] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Accepted: 12/17/2017] [Indexed: 12/14/2022]
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Silva JAF, Bruni-Cardoso A, Augusto TM, Damas-Souza DM, Barbosa GO, Felisbino SL, Stach-Machado DR, Carvalho HF. Macrophage roles in the clearance of apoptotic cells and control of inflammation in the prostate gland after castration. Prostate 2018; 78:95-103. [PMID: 29134671 DOI: 10.1002/pros.23449] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 10/13/2017] [Indexed: 01/09/2023]
Abstract
BACKGROUND Androgen deprivation results in massive apoptosis in the prostate gland. Macrophages are actively engaged in phagocytosing epithelial cell corpses. However, it is unknown whether microtubule-associated protein 1 light chain 3 alpha (LC3)-associated phagocytosis (LAP) is involved and contribute to prevent inflammation. METHODS Flow cytometry, RT-PCR and immunohistochemistry were used to characterize the macrophage subpopulation residing in the epithelial layer of the rat ventral prostate (VP) after castration. Stereology was employed to determine variations in the number of ED1 and ED2. Mice were treated with either chloroquine or L-asparagine to block autophagy. RESULTS M1 (iNOS-positive) and M2 macrophages (MRC1+ and ARG1+) were not found in the epithelium at day 5 after castration. The percentage of CD68+ (ED1) and CD163+ (ED2) phenotypes increased after castration but only CD68+ cells were present in the epithelium. RT-PCR showed increased content of the autophagy markers Bcl1 and LC3 after castration. In addition, immunohistochemistry showed the presence of LC3+ and ATG5+ cells in the epithelium. Double immunohistochemistry showed these cells to be CD68+ /LC3+ , compatible with the LAP phenotype. LC3+ cells accumulate significantly after castration. Chloroquine and L-asparagine administration caused inflammation of the glands at day 5 after castration. CONCLUSIONS CD68+ macrophages phagocytose apoptotic cell corpses and activate the LAP pathway, thereby contributing to the preservation of a non-inflammed microenvironment. Marked inflammation was detected when autophagy blockers were administered to castrated animals.
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Affiliation(s)
- Juliete A F Silva
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | | | - Taize M Augusto
- Jundiai Medical School, Jundiai, São Paulo, Brazil
- National Institute of Photonics Applied to Cell Biology (INFABiC), Campinas, São Paulo, Brazil
| | - Danilo M Damas-Souza
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - Guilherme O Barbosa
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - Sérgio L Felisbino
- National Institute of Photonics Applied to Cell Biology (INFABiC), Campinas, São Paulo, Brazil
- Department of Morphology, Institute of Biosciences, UNESP - Univ Estadual Paulista, Botucatu, São Paulo, Brazil
| | - Dagmar R Stach-Machado
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - Hernandes F Carvalho
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
- National Institute of Photonics Applied to Cell Biology (INFABiC), Campinas, São Paulo, Brazil
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12
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Campos MS, Ribeiro NCS, de Lima RF, Santos MB, Vilamaior PSL, Regasini LO, Biancardi MF, Taboga SR, Santos FCA. Anabolic effects of chrysin on the ventral male prostate and female prostate of adult gerbils (Meriones unguiculatus). Reprod Fertil Dev 2018; 30:1180-1191. [DOI: 10.1071/rd17456] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 02/04/2018] [Indexed: 11/23/2022] Open
Abstract
Chrysin is a bioflavonoid found in fruits, flowers, tea, honey and wine, which has antioxidant, anti-inflammatory, antiallergic and anticarcinogenic properties. This flavone has also been considered as beneficial for reproduction due its testosterone-boosting potential. Thus, the aim of this study was to evaluate the effects of chrysin on the prostate and gonads of male and female adult gerbils. In addition, a comparative analysis of the effects of testosterone on these same organs was conducted. Ninety-day-old male and female gerbils were treated with chrysin (50 mg kg−1 day−1) or testosterone cypionate (1 mg kg−1 week−1) for 21 days. The ventral male prostate and female prostate were dissected out for morphological, morphometric–stereological and ultrastructural assays. Testes and ovaries were submitted to morphological and morphometric–stereological analyses. Chrysin treatment caused epithelial hyperplasia and stromal remodelling of the ventral male and female prostate. Ultrastructurally, male and female prostatic epithelial cells in the chrysin group presented marked development of the organelles involved in the biosynthetic–secretory pathway, whereas cellular toxicity was observed only in female glands. Chrysin preserved normal testicular morphology and increased the number of growing ovarian follicles. Comparatively, testosterone treatment was detrimental to the prostate and gonads, since foci of prostatic intraepithelial neoplasia and gonadal degeneration were observed in both sexes. Thus, under the experimental conditions of this study, chrysin was better tolerated than testosterone in the prostate and gonads.
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Felix-Patrício B, Miranda AF, Medeiros JL, Gallo CBM, Gregório BM, Souza DB, Costa WS, Sampaio FJB. The prostate after castration and hormone replacement in a rat model: structural and ultrastructural analysis. Int Braz J Urol 2017; 43:957-965. [PMID: 28379662 PMCID: PMC5678530 DOI: 10.1590/s1677-5538.ibju.2016.0484] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Accepted: 01/31/2017] [Indexed: 12/13/2022] Open
Abstract
Purpose: To evaluate if late hormonal replacement is able to recover the prostatic tissue modified by androgenic deprivation. Materials and Methods: 24 rats were assigned into a Sham group; an androgen deficient group, submitted to bilateral orchiectomy (Orch); and a group submitted to bilateral orchiectomy followed by testosterone replacement therapy (Orch+T). After 60 days from surgery blood was collected for determination of testosterone levels and the ventral prostate was collected for quantitative and qualitative microscopic analysis. The acinar epithelium height, the number of mast cells per field, and the densities of collagen fibers and acinar lumen were analyzed by stereological methods under light microscopy. The muscle fibers and types of collagen fibers were qualitatively assessed by scanning electron microscopy and polarization microscopy. Results: Hormone depletion (in group Orch) and return to normal levels (in group Orch+T) were effective as verified by serum testosterone analysis. The androgen deprivation promoted several alterations in the prostate: the acinar epithelium height diminished from 16.58±0.47 to 11.48±0.29μm; the number of mast cells per field presented increased from 0.45±0.07 to 2.83±0.25; collagen fibers density increased from 5.83±0.92 to 24.70±1.56%; and acinar lumen density decreased from 36.78±2.14 to 16.47±1.31%. Smooth muscle was also increased in Orch animals, and type I collagen fibers became more predominant in these animals. With the exception of the densities of collagen fibers and acinar lumen, in animals receiving testosterone replacement therapy all parameters became statistically similar to Sham. Collagen fibers density became lower and acinar lumen density became higher in Orch+T animals, when compared to Sham. This is the first study to demonstrate a relation between mast cells and testosterone levels in the prostate. This cells have been implicated in prostatic cancer and benign hyperplasia, although its specific role is not understood. Conclusion: Testosterone deprivation promotes major changes in the prostate of rats. The hormonal replacement therapy was effective in reversing these alterations.
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Affiliation(s)
- Bruno Felix-Patrício
- Instituto de Ciências Humanas e da Saúde, Universidade Federal Fluminense, Rio das Ostras, RJ, Brasil
| | - Alexandre F Miranda
- Urogenital Research Unit, Universidade Estadual do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | | | - Carla B M Gallo
- Urogenital Research Unit, Universidade Estadual do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - Bianca M Gregório
- Urogenital Research Unit, Universidade Estadual do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - Diogo B Souza
- Urogenital Research Unit, Universidade Estadual do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - Waldemar S Costa
- Urogenital Research Unit, Universidade Estadual do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - Francisco J B Sampaio
- Urogenital Research Unit, Universidade Estadual do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
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Nogueira Pangrazi E, da Silva RF, Kido LA, Montico F, Cagnon VHA. Nintedanib treatment delays prostate dorsolateral lobe cancer progression in the TRAMP model: contribution to the epithelial-stromal interaction balance. Cell Biol Int 2017; 42:153-168. [PMID: 28980742 DOI: 10.1002/cbin.10881] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Accepted: 09/30/2017] [Indexed: 12/11/2022]
Abstract
Prostate cancer (PCa) progression mechanism has been linked to epithelial proliferation, tumor invasion ability, and growth factors. Nintedanib (BIBF 1120) has been reported as being FGF and VEGF pathway inhibitors, exhibiting antitumor activity. Thus, the objective herein was to characterize the early Nintedanib treatment effects on the structure and molecules involved in the basal membrane, the extracellular matrix (ECM) maintenance, in addition to the angiogenesis and mitogenic processes at different grades of prostatic tumor development in TRAMP mice. Therefore, 45 male TRAMP mice were divided into control groups: 8-week-old mice (TC8), 12-week-old mice (TC12), and 16-week-old mice (TC16); and treated groups with 10 mg/kg/day Nintedanib dose for 4 weeks. The treated groups were euthanized at 12 (TN12) and 16 (TN16) weeks of age. Samples from the dorsolateral lobe were collected and processed for light microscopy, immunohistochemistry, Western blotting, and microvessel density analysis. The results showed that early Nintedanib treatment led to an increase of healthy epithelium frequency and a reduction of LGPIN and a maximum vascularization density in the TN12 group. Also, treatment led to a well-differentiated adenocarcinoma decrease and an α and β dystroglycan and also laminin 1 increase in the TN16 group. IGFR1 decreased in the TN16 group. To conclude, early Nintedanib treatment led to a reduction in cancer severity, interfering in both ECM compounds and angiogenesis process to then contribute to a balance, not only in the prostatic epithelium and stroma, but also in the epithelial-stromal interaction during PCa progression.
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Affiliation(s)
- Ellen Nogueira Pangrazi
- Department of Structural and Functional Biology, Institute of Biology, University of Campinas (UNICAMP), P.O. Box 6109, 13083-865, São Paulo, Brazil
| | - Raquel F da Silva
- Department of Structural and Functional Biology, Institute of Biology, University of Campinas (UNICAMP), P.O. Box 6109, 13083-865, São Paulo, Brazil
| | - Larissa A Kido
- Department of Structural and Functional Biology, Institute of Biology, University of Campinas (UNICAMP), P.O. Box 6109, 13083-865, São Paulo, Brazil
| | - Fabio Montico
- Department of Structural and Functional Biology, Institute of Biology, University of Campinas (UNICAMP), P.O. Box 6109, 13083-865, São Paulo, Brazil
| | - Valéria H A Cagnon
- Department of Structural and Functional Biology, Institute of Biology, University of Campinas (UNICAMP), P.O. Box 6109, 13083-865, São Paulo, Brazil
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15
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The prostate response to prolactin modulation in adult castrated rats subjected to testosterone replacement. J Mol Histol 2017; 48:403-415. [PMID: 28988314 DOI: 10.1007/s10735-017-9738-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 09/27/2017] [Indexed: 12/22/2022]
Abstract
Despite the androgenic dependence, other hormones, growth factors, and cytokines are necessary to support prostatic growth and maintain the glandular structure; among them, prolactin is a non-steroidal hormone secreted mainly by the pituitary gland. However, extra-pituitary expression of prolactin, such as in the prostate, has also been demonstrated, highlighting the paracrine and autocrine actions of prolactin within the prostate. Here, we investigated whether prolactin modulation alters ventral prostate (VP) morphophysiology in adult castrated rats. Sprague Dawley rats were castrated and after 21 days, divided into ten experimental groups (n = 6/group): castrated control: castrated animals that did not receive treatment; castrated+testosterone: castrated animals that received T (4 mg/kg/day); castrated+PRL (PRL): castrated animals receiving prolactin (0.3 mg/kg/day); castrated+T+PRL: castrated animals that received a combination of testosterone and prolactin; and castrated+bromocriptine (BR): castrated animals that received bromocriptine (0.4 mg/kg/day). The control group included intact animals. The animals were treated for 3 or 10 consecutive days. At the end of experimental period, the animals were euthanized, and the blood and VP lobes were collected and analyzed by different methods. The main findings were that the administration of prolactin to castrated rats did not exert anabolic effects on the VP. Although we observed activation of downstream prolactin signaling after prolactin administration, this was not enough to overcome the prostatic androgen deficiency. Likewise, there was no additional glandular involution in the castrated group treated with bromocriptine. We concluded that despite stimulating the downstream signaling pathway, exogenous prolactin does not act on VP in the absence or presence of high levels of testosterone.
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Carvalho HF, Taboga SR, Felisbino SL, Biancardi MF. Prostate epithelium basement membrane and prostate cell biology: 20 years. Cell Biol Int 2017; 41:1170-1173. [PMID: 28755475 DOI: 10.1002/cbin.10831] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Accepted: 07/26/2017] [Indexed: 01/11/2023]
Affiliation(s)
- Hernandes F Carvalho
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas (UNICAMP), Campinas, SP, Brazil
| | - Sebastião Roberto Taboga
- IBILCE, Universidade Estadual Júlio de Mesquita Filho (UNESP), São José do Rio Preto, SP, Brazil
| | - Sérgio Luis Felisbino
- Department of Morphology, Institute of Biosciences, Universidade Estadual Júlio de Mesquita Filho (UNESP), Botucatu, SP, Brazil
| | - Manoel F Biancardi
- Department of Histology, Embryology, and Cell Biology, Institute of Biological Sciences, Federal University of Goiás, Goiania, GO, Brazil
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17
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Antoniassi JQ, Fochi RA, Góes RM, Vilamaior PSL, Taboga SR. Corticosterone influences gerbil (Meriones unguiculatus) prostatic morphophysiology and alters its proliferation and apoptosis rates. Int J Exp Pathol 2017; 98:134-146. [PMID: 28664583 PMCID: PMC5573771 DOI: 10.1111/iep.12232] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Accepted: 03/30/2017] [Indexed: 12/24/2022] Open
Abstract
Glucocorticoids (GCs) are hormones that are widely used in medicine; but although side effects are generally recognised, little is known about the precise mechanisms that is implicated in many of these side effects. Furthermore, GCs are highly correlated with stress and behaviour disorders. This study evaluated the effects of the glucocorticoid corticosterone on the ventral prostate of the Mongolian gerbil. Male gerbils (Meriones unguiculatus) (n = 5) received intraperitoneal injections of saline or corticosterone in doses of 0.5 mg/kg/day and 1.5 mg/kg/day for 5 days; while some of the animals were killed immediately after the treatment, the others were killed 5 days after the treatment period. The data show that corticosterone influences the structure and functionality of this organ. This hormone has anti-proliferative and anti-apoptotic properties in the prostate. In addition, the frequencies of the androgen (AR), oestrogen (ERα, ERβ) and glucocorticoid (GR) receptors changed. The frequencies of AR, GR and ERβ decreased in the Ct1/5 group; in the groups with rest period, the frequencies of GR increased and ERβ decreased in the epithelium. Changes in the proliferative index, apoptotic index and receptor activity may have contributed to the emergence of prostatic morphological alterations, such as the presence of cellular debris and inflammatory cells. Different doses of corticosterone had variable effects on the prostate, with a higher dose showing subtler effects and a lower dose showing more striking effects. The corticosterone effects on nuclear receptors were reverted or attenuated after a rest period, which was not observed for proliferation and apoptosis. In summary, we have demonstrated that corticosterone might influence the prostatic morphophysiology and that these changes may be linked in some way to the altered receptor distribution.
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Affiliation(s)
- Julia Quilles Antoniassi
- Department of Structural and Functional BiologyInstitute of BiologyState University of Campinas (UNICAMP)São PauloBrazil
| | - Ricardo Alexandre Fochi
- Department of BiologyInstitute of Biosciences, Humanities and Exact Sciences (IBILCE)University Estadual Paulista (UNESP)São PauloBrazil
| | - Rejane Maira Góes
- Department of BiologyInstitute of Biosciences, Humanities and Exact Sciences (IBILCE)University Estadual Paulista (UNESP)São PauloBrazil
| | - Patricia Simone Leite Vilamaior
- Department of BiologyInstitute of Biosciences, Humanities and Exact Sciences (IBILCE)University Estadual Paulista (UNESP)São PauloBrazil
| | - Sebastião Roberto Taboga
- Department of Structural and Functional BiologyInstitute of BiologyState University of Campinas (UNICAMP)São PauloBrazil
- Department of BiologyInstitute of Biosciences, Humanities and Exact Sciences (IBILCE)University Estadual Paulista (UNESP)São PauloBrazil
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18
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Delella FK, de Almeida FLA, Nunes HC, Rinaldi JC, Felisbino SL. Fibrillar collagen genes are not coordinately upregulated with TGF β1 expression in finasteride-treated prostate. Cell Biol Int 2017; 41:1214-1222. [PMID: 28493523 DOI: 10.1002/cbin.10787] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Accepted: 05/08/2017] [Indexed: 02/06/2023]
Abstract
Benign prostatic hyperplasia (BPH) is the most common cause of lower urinary tract symptoms (LUTS) in older men. In this regard, recent studies have attempted to define the relationships between prostatic fibrosis, LUTS, and increased expression of transforming growth factor β1 (TGF β1) in BHP. Therapeutic approaches for BPH such as 5-α-reductase inhibitors and alpha-adrenergic blocking agents increase TGF β1 expression in the prostatic tissue. Here, we investigated the effects of the 5-α-reductase inhibitor-finasteride-on rat ventral prostate tissue, especially with regard to the tissue distribution and gene expression of fibrillar collagens. Adult Wistar rats (n = 15) were treated with finasteride (25 mg/kg/day) by subcutaneous injection for 7 and 30 days. Age-matched, vehicle-treated (n = 15) adult Wistar rats were used as control. Finasteride treatment reduced prostate size and increased the area of types I and III collagen fibers in the prostatic stroma. As expected, TGF β1 mRNA expression was upregulated by finasteride treatment. However, COL1A1 and COL3A1 mRNA expressions decreased after both 7 and 30 days of finasteride treatment, suggesting that finasteride treatment promotes prostate parenchyma and stroma changes, which lead to the observed types I and III collagen remodeling without de novo collagen synthesis. The upregulation of TGF β1 mRNA and protein associated with the 5-α-reductase inhibitor is more closely related to epithelial and stromal cell death pathways than to prostatic fibrosis.
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Affiliation(s)
- Flávia Karina Delella
- Department of Morphology, Institute of Biosciences-Sao Paulo State University (Unesp), Botucatu, Sao Paulo, Brazil
| | - Fernanda Losi Alves de Almeida
- Department of Morphological Sciences, Biological Sciences Center-State University of Maringa (UEM), Maringa, Parana, Brazil
| | - Helga Caputo Nunes
- Department of Morphology, Institute of Biosciences-Sao Paulo State University (Unesp), Botucatu, Sao Paulo, Brazil
| | - Jaqueline Carvalho Rinaldi
- Department of Morphological Sciences, Biological Sciences Center-State University of Maringa (UEM), Maringa, Parana, Brazil
| | - Sérgio Luis Felisbino
- Department of Morphology, Institute of Biosciences-Sao Paulo State University (Unesp), Botucatu, Sao Paulo, Brazil
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19
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Hetzl AC, Montico F, Kido LA, Cagnon VHA. Prolactin, EGFR, vimentin and α-actin profiles in elderly rat prostate subjected to steroid hormonal imbalance. Tissue Cell 2016; 48:189-96. [DOI: 10.1016/j.tice.2016.03.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Revised: 03/15/2016] [Accepted: 03/16/2016] [Indexed: 12/20/2022]
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20
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Adur J, Barbosa G, Pelegati V, Baratti M, Cesar C, Casco V, Carvalho H. Multimodal and non-linear optical microscopy applications in reproductive biology. Microsc Res Tech 2016; 79:567-82. [DOI: 10.1002/jemt.22684] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Revised: 04/18/2016] [Accepted: 05/04/2016] [Indexed: 01/11/2023]
Affiliation(s)
- J. Adur
- Biophotonic Group. Optics and Photonics Research Center (CEPOF); Institute of Physics “Gleb Wataghin,” State University of Campinas; Brazil
- Biofotónica y Procesamiento de Información Biológica (ByPIB); CITER - Centro de Investigación y Transferencia de Entre Ríos, CONICET-UNER; Argentina
- Microscopy Laboratory Applied to Molecular and Cellular Studies, School of Bioengineering; National University of Entre Ríos; Argentina
| | - G.O. Barbosa
- Department of Structural and Functional Biology; Biology Institute, State University of Campinas; Brazil
| | - V.B. Pelegati
- Biophotonic Group. Optics and Photonics Research Center (CEPOF); Institute of Physics “Gleb Wataghin,” State University of Campinas; Brazil
- INFABiC - National Institute of Science and Technology on Photonics Applied to Cell Biology, Campinas; Brazil
| | - M.O. Baratti
- INFABiC - National Institute of Science and Technology on Photonics Applied to Cell Biology, Campinas; Brazil
| | - C.L. Cesar
- Biophotonic Group. Optics and Photonics Research Center (CEPOF); Institute of Physics “Gleb Wataghin,” State University of Campinas; Brazil
- INFABiC - National Institute of Science and Technology on Photonics Applied to Cell Biology, Campinas; Brazil
- Department of Physics of Federal University of Ceara (UFC); Brazil
| | - V.H. Casco
- Biofotónica y Procesamiento de Información Biológica (ByPIB); CITER - Centro de Investigación y Transferencia de Entre Ríos, CONICET-UNER; Argentina
- Microscopy Laboratory Applied to Molecular and Cellular Studies, School of Bioengineering; National University of Entre Ríos; Argentina
| | - H.F. Carvalho
- Department of Structural and Functional Biology; Biology Institute, State University of Campinas; Brazil
- INFABiC - National Institute of Science and Technology on Photonics Applied to Cell Biology, Campinas; Brazil
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21
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de Amorim Ribeiro IC, da Costa CAS, da Silva VAP, Côrrea LBNS, Boaventura GT, Chagas MA. Flaxseed reduces epithelial proliferation but does not affect basal cells in induced benign prostatic hyperplasia in rats. Eur J Nutr 2016; 56:1201-1210. [PMID: 26857761 DOI: 10.1007/s00394-016-1169-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Accepted: 01/29/2016] [Indexed: 02/04/2023]
Abstract
PURPOSE This study aimed to quantitatively and qualitatively evaluate the effects of a flaxseed-based diet on the histoarchitecture of the prostate of normal Wistar rats and of rats with induced BPH. METHODS The study included four experimental groups of ten animals each: casein control group (CCG), who were fed a casein-based diet; flaxseed control group (FCG), who were fed a flaxseed-based diet; hyperplasia-induced casein group (HICG), who were fed a casein-based diet; and hyperplasia-induced flaxseed group (HIFG), who were fed a flaxseed-based diet. Hyperplasia was induced by the subcutaneous implantation of silicone pellets containing testosterone propionate. After 20 weeks, the rats were euthanized and their prostate fixed in buffered formalin. Tissue sections were stained with HE, picrosirius red and immunostained for nuclear antigen p63. Histomorphometric analysis evaluated the epithelial thickness, epithelial area, individual luminal area, and total area of prostatic alveoli. RESULTS The mean epithelial thickness obtained for HIFG and HICG was 16.52 ± 1.65 and 20.58 ± 2.86 µm, respectively. The mean epithelial thickness in HICG was greater than that in the other groups tested. HIFG had a smaller epithelial thickness and lower percentage of papillary projections in the prostatic alveoli. No significant difference was observed between CCG and FCG. The total area and mean alveolar area showed no significant differences between the groups. The number of cells immunostained for p63 was not significantly different between the groups evaluated. CONCLUSION These results suggest that flaxseed has a protective effect on the prostate epithelium in BPH-induced animals.
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Affiliation(s)
- Ilma Cely de Amorim Ribeiro
- Department of Morphology, Laboratory of Cellular and Extracellular Biomorphology Biomedic Institute, Federal Fluminense University, Rua Hernani Melo, 101, São Domingos, Niterói, Rio de Janeiro, RJ, 24210-130, Brazil
| | - Carlos Alberto Soares da Costa
- Department of Nutrition and Dietetics, Experimental Nutrition Laboratory, College of Nutrition, Federal Fluminense University, 30/5th floor, Rio de Janeiro, 24020-140, Brazil
| | - Vivian Alves Pereira da Silva
- Department of Morphology, Laboratory of Cellular and Extracellular Biomorphology Biomedic Institute, Federal Fluminense University, Rua Hernani Melo, 101, São Domingos, Niterói, Rio de Janeiro, RJ, 24210-130, Brazil
| | - Lanna Beatriz Neves Silva Côrrea
- Department of Morphology, Laboratory of Cellular and Extracellular Biomorphology Biomedic Institute, Federal Fluminense University, Rua Hernani Melo, 101, São Domingos, Niterói, Rio de Janeiro, RJ, 24210-130, Brazil
| | - Gilson Teles Boaventura
- Department of Nutrition and Dietetics, Experimental Nutrition Laboratory, College of Nutrition, Federal Fluminense University, 30/5th floor, Rio de Janeiro, 24020-140, Brazil
| | - Mauricio Alves Chagas
- Department of Morphology, Laboratory of Cellular and Extracellular Biomorphology Biomedic Institute, Federal Fluminense University, Rua Hernani Melo, 101, São Domingos, Niterói, Rio de Janeiro, RJ, 24210-130, Brazil.
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22
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Damasceno AA, Carvalho CP, Santos EMB, Botelho FV, Araújo FA, Deconte SR, Tomiosso TC, Balbi APC, Zanon RG, Taboga SR, Góes RM, Ribeiro DL. Effects of maternal diabetes on male offspring: high cell proliferation and increased activity of MMP-2 in the ventral prostate. Cell Tissue Res 2014; 358:257-69. [PMID: 24988912 DOI: 10.1007/s00441-014-1941-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Accepted: 05/28/2014] [Indexed: 01/23/2023]
Abstract
This study presents a comprehensive view of the histological and functional status of the prostate of adult rat offspring of mothers subjected to gestational diabetes induced by alloxan. The ventral prostate of male adult offspring of diabetic (DP) or normal (CP) mothers was evaluated for collagen fibres, cell death, fibroblasts, smooth muscle cells, cell proliferation, matrix metalloproteinases (MMPs), androgen receptors (AR), transforming growth factor β1 (TGFβ-1), catalase and total antioxidant activity. The prostates of DP animals were lower in weight than those of the CP group. The DP group also exhibited hyperglycaemia and hypotestosteronemia, higher cell proliferation and AR expression, a reduction in α-actin (possibly interfering with the reproductive function of the prostate), and enhanced activity of MMP-2, although the absolute content of MMP-2 was lower in this group. These findings were associated with increased TGFβ-1 and decreased collagen distribution. The prostates of DP rats additionally exhibited reductions in catalase and total antioxidant activity. Thus, rats developing in a diabetic intrauterine environment have glycaemic and hormonal changes that impact on the structure and physiology of the prostate in adulthood. The increased AR expression possibly leads to elevated cell proliferation. Stromal remodelling was characterized by enhanced activity of MMP-2 and collagen degradation, even with increased TGFβ-1 activation. These changes associated with increased oxidative stress might interfere with tissue architecture and glandular homeostasis.
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Affiliation(s)
- A A Damasceno
- Histology Sector, Institute of Biomedical Sciences-ICBIM, Federal University of Uberlândia, Uberlândia, Brazil
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Rosa-Ribeiro R, Nishan U, Vidal RO, Barbosa GO, Reis LO, Cesar CL, Carvalho HF. Transcription factors involved in prostate gland adaptation to androgen deprivation. PLoS One 2014; 9:e97080. [PMID: 24886974 PMCID: PMC4041569 DOI: 10.1371/journal.pone.0097080] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Accepted: 04/15/2014] [Indexed: 11/18/2022] Open
Abstract
Androgens regulate prostate physiology, and exert their effects through the androgen receptor. We hypothesized that androgen deprivation needs additional transcription factors to orchestrate the changes taking place in the gland after castration and for the adaptation of the epithelial cells to the androgen-deprived environment, ultimately contributing to the origin of castration-resistant prostate cancer. This study was undertaken to identify transcription factors that regulate gene expression after androgen deprivation by castration (Cas). For the sake of comparison, we extended the analysis to the effects of administration of a high dose of 17β-estradiol (E2) and a combination of both (Cas+E2). We approached this by (i) identifying gene expression profiles and enrichment terms, and by searching for transcription factors in the derived regulatory pathways; and (ii) by determining the density of putative transcription factor binding sites in the proximal promoter of the 10 most up- or down-regulated genes in each experimental group in comparison to the controls Gapdh and Tbp7. Filtering and validation confirmed the expression and localized EVI1 (Mecom), NFY, ELK1, GATA2, MYBL1, MYBL2, and NFkB family members (NFkB1, NFkB2, REL, RELA and RELB) in the epithelial and/or stromal cells. These transcription factors represent major regulators of epithelial cell survival and immaturity as well as an adaptation of the gland as an immune barrier in the absence of functional stimulation by androgens. Elk1 was expressed in smooth muscle cells and was up-regulated after day 4. Evi1 and Nfy genes are expressed in both epithelium and stroma, but were apparently not affected by androgen deprivation.
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Affiliation(s)
- Rafaela Rosa-Ribeiro
- Department of Structural and Functional Biology, State University of Campinas, Campinas, São Paulo, Brazil
| | - Umar Nishan
- Department of Structural and Functional Biology, State University of Campinas, Campinas, São Paulo, Brazil
| | - Ramon Oliveira Vidal
- Laboratory of Bioinformatics, National Center for Research on Energy and Materials, Campinas, São Paulo, Brazil
| | - Guilherme Oliveira Barbosa
- Department of Structural and Functional Biology, State University of Campinas, Campinas, São Paulo, Brazil
| | | | - Carlos Lenz Cesar
- Department of Quantum Physics, State University of Campinas, Campinas, São Paulo, Brazil
- National Institute of Photonics Applied to Cell Biology (INFABiC), State University of Campinas, Campinas, São Paulo, Brazil
| | - Hernandes F. Carvalho
- Department of Structural and Functional Biology, State University of Campinas, Campinas, São Paulo, Brazil
- National Institute of Photonics Applied to Cell Biology (INFABiC), State University of Campinas, Campinas, São Paulo, Brazil
- * E-mail:
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Indole-3-carbinol attenuates the deleterious gestational effects of bisphenol A exposure on the prostate gland of male F1 rats. Reprod Toxicol 2014; 43:56-66. [DOI: 10.1016/j.reprotox.2013.11.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Revised: 10/04/2013] [Accepted: 11/04/2013] [Indexed: 02/06/2023]
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25
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Rosa-Ribeiro R, Barbosa GO, Kühne F, Carvalho HF. Desquamation is a novel phenomenon for collective prostate epithelial cell deletion after castration. Histochem Cell Biol 2013; 141:213-20. [PMID: 24105629 DOI: 10.1007/s00418-013-1152-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/26/2013] [Indexed: 10/26/2022]
Abstract
The mechanism underlying castration-induced prostate regression, which is a classical physiological concept translated into the therapeutic treatment of advanced prostate cancer, involves epithelial cell apoptosis. In searching for events and mechanisms contributing to prostate regression in response to androgen modulation, we have frequently observed the collective deletion of epithelial cells. This work was undertaken to characterize this phenomenon hereafter named desquamation and to verify its presence after 17β-estradiol (E2) administration. Electron microscopy revealed that the desquamating cells had preserved cell-cell junctions and collapsed nuclear contents. The TUNEL reaction was negative for these cells, which were also negative for cleaved caspases-8, -9, -3 and nuclear apoptosis-inducing factor. Detailed analyses revealed that the condensed chromatin was first affected detaching from the nuclear lamina, which was observable after lamin A immunohistochemistry, suggesting the lack of lamin A degradation. A search in animals treated with supraphysiological E2 employed as an alternative anti-androgen treatment revealed no desquamation. The combined treatment (Cas + E2 group) caused changes particular to each treatment, including desquamation. In conclusion, desquamation appeared as a novel phenomenon contributing to collective prostate epithelial cell deletion, distinct from the classical castration-induced apoptosis and particular to the androgen deprivation resulting from surgical castration, and should be considered as part of the mechanisms promoting organ regression.
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Affiliation(s)
- Rafaela Rosa-Ribeiro
- Department of Cell Biology, Institute of Biology, State University of Campinas (UNICAMP), Charles Darwin Street, Bld N, Rooms 10/11, Campinas, SP, 13083-863, Brazil
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Ramzan F, Qureshi IZ, Ramzan M, Ramzan MH, Ramzan F. Kisspeptin-10 induces dose dependent degeneration in prepubertal rat prostate gland. Prostate 2013; 73:690-9. [PMID: 23129449 DOI: 10.1002/pros.22609] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Accepted: 10/05/2012] [Indexed: 11/10/2022]
Abstract
BACKGROUND Kisspeptin peptides mediate their actions through the GnRH loop system. How kisspeptins affect prostate gland in prepubertal male mammals remains elusive. METHODS To address this kisspeptin was administered as subchronic (12 days) twice daily i.p. dose at three different dosage regimens: 10 pg, 1 ng and 1 µg, to prepubertal male Sprague-Dawley rats (PND 35). Control rats were maintained in parallel. At the end of the experiment prostate gland was dissected out and processed for light and electron microscopy. DNA damage was also estimated by DNA ladder assay and DNA fragmentation assay. RESULTS Prostate weights decreased significantly (P < 0.05) at 1 µg treatment dose of kisspeptin. The epithelial height of secretory acini of prostate decreased at 10 pg (P < 0.05), 1 ng, and 1 µg doses (P < 0.001). Histomorphology and ultrastructure demonstrated, decrease in epithelial cell height, epithelial folding and dilatation of the organelles with kisspeptin treatment. Percent DNA damage to the prostatic tissue was 20.74 ± 2.18, 43.60 ± 2.39, and 58.18 ± 2.59 at 10 pg, 1 ng and 1 µg doses, respectively. CONCLUSION The study reveals that continuous administration of kisspeptin does not lead to an early maturation but instead severe degeneration of prepubertal prostate gland. Wiley Periodicals, Inc.
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Affiliation(s)
- Faiqah Ramzan
- Gomal Centre of Biochemistry and Biotechnology, Gomal University, Dera Ismail Khan, Pakistan.
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Corradi LS, Jesus MM, Fochi RA, Vilamaior PSL, Justulin LA, Góes RM, Felisbino SL, Taboga SR. Structural and ultrastructural evidence for telocytes in prostate stroma. J Cell Mol Med 2013; 17:398-406. [PMID: 23388038 PMCID: PMC3823021 DOI: 10.1111/jcmm.12021] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2012] [Accepted: 12/28/2012] [Indexed: 12/24/2022] Open
Abstract
The prostate comprises a glandular epithelium embedded within a fibromuscular stroma. The stroma is a complex arrangement of cells and extracellular matrix (ECM) components in addition to growth factors, regulatory molecules, remodelling enzymes, blood vessels, nerves and immune cells. The principal sources of ECM components are fibroblasts and smooth muscle cells (SMC), which synthesize the structural and regulatory components of the ECM. Telocytes (TCs) were recently described as a novel stromal cell type that exhibited characteristic features. The aim of this study was to confirm the presence of TCs in prostate stromal tissue of gerbils, as the stromal compartment of this gland is a dynamic microenvironment. We used transmission electron microscopy (TEM), light microscopy and immunohistochemistry methods to provide morphological evidence for the presence of TCs. Cells that resembled TCs were observed in gerbil prostatic stroma. These cells had small cellular bodies with very thin and extremely long cellular processes. They were found primarily in the subepithelial area and also at the periphery of SMC layers. TCs also exhibited moniliform processes, caveolae and nuclei surrounded by small amounts of cytoplasm. Close contacts between TC podomers were evident, particularly in the adjacent epithelial compartment. This morphological evidence supported the presence of TCs in the gerbil prostatic stroma, which we report for the first time.
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Affiliation(s)
- Lara S Corradi
- Department of Biology, Institute of Biosciences, Humanities and Exact Sciences (IBILCE), Univ. Estadual Paulista - UNESP, São José do Rio Preto, São Paulo, Brazil
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Rochel-Maia SS, Santos FC, Alonso-Magdalena P, Góes RM, Vilamaior PS, Warner M, Gustafsson JÅ, Taboga SR. Estrogen Receptors Alpha and Beta in Male and Female Gerbil Prostates1. Biol Reprod 2013; 88:7. [DOI: 10.1095/biolreprod.112.103614] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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Sarobo C, Lacorte LM, Martins M, Rinaldi JC, Moroz A, Scarano WR, Delella FK, Felisbino SL. Chronic caffeine intake increases androgenic stimuli, epithelial cell proliferation and hyperplasia in rat ventral prostate. Int J Exp Pathol 2012; 93:429-37. [PMID: 23136995 PMCID: PMC3521899 DOI: 10.1111/j.1365-2613.2012.00843.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2012] [Accepted: 08/13/2012] [Indexed: 12/01/2022] Open
Abstract
Coffee intake has been associated with a low risk of developing cancer, including prostate cancer, which is one of the most commonly diagnosed cancer in men. However, few studies have evaluated the chronic effects of caffeine, which is the most abundant methylxanthine in coffee, on prostate morphology and physiology. In the present study, we investigated the effects of chronic, low-dose caffeine intake on rat prostate morphology from puberty to adulthood. Five-week-old male Wistar rats were randomized into two experimental groups: caffeine-treated (20 ppm in drinking water, n = 12) and control (n = 12). The ventral and dorsolateral prostates were dissected, weighted and submitted to morphological, morphometrical and immunohistochemical analysis of cellular proliferation, apoptosis and androgen receptor (AR) tissue expression. The testosterone (T) and dihydrotestosterone (DHT) concentrations were measured in the plasma. Our results show that caffeine intake increased the concentrations of T and DHT, organ weight, epithelial cell proliferation and AR tissue expression in the ventral prostatic lobe. All the ventral prostates from the caffeine-treated animals presented various degrees of epithelial and stromal hyperplasia. Our results suggest that chronic caffeine intake from puberty increases androgenic signalling and cell proliferation in the rat prostate gland and can be related to the development of benign prostatic hyperplasia.
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Affiliation(s)
- Carolina Sarobo
- Department of Morphology, Institute of Biosciences, Univ Estadual Paulista (UNESP), Botucatu, SP, Brazil
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da Silva DAF, Barbosa F, Scarano WR. Oral exposure to methylmercury modifies the prostatic microenvironment in adult rats. Int J Exp Pathol 2012; 93:354-60. [PMID: 22974216 DOI: 10.1111/j.1365-2613.2012.00825.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Methylmercury (MeHg) is an environmental pollutant that is highly toxic to the central nervous system. As its effects on male reproductive system are poorly understood, this study was carried out to analyse the effects of MeHg on the rat prostate. To evaluate the MeHg toxicity on ventral prostate, three groups of adult male Wistar rats received oral doses of 0.5, 1.0 and 3.0 mg/kg MeHg, respectively, on a daily basis for 14 days. A fourth group was used as a control. The prostate weight was decreased in rats treated orally with 0.5 mg/kg MeHg compared to controls. Also, Hg concentration increased significantly in the prostate after treatments. There were reductions in serum testosterone levels and androgen receptor immunoreactivity in animals receiving 3.0 mg MeHg/kg. The stereological data showed changes in the prostatic epithelial, stromal and luminal compartments which varied according to the different doses. Histopathological alterations, such as chronic inflammation, stratified epithelial hyperplasia and epithelial inflammatory reactive atypia, were observed in the 0.5 mg/kg MeHg-treated group. Epithelial atrophy was observed in the 3.0 mg/kg MeHg-treated group. In conclusion, the MeHg affects prostatic homoeostasis resulting in histopathological changes that may be relevant in the pathogenesis of prostatic disease.
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Delella FK, Lacorte LM, Almeida FLA, Pai MD, Felisbino SL. Fibrosis-related gene expression in the prostate is modulated by doxazosin treatment. Life Sci 2012; 91:1281-7. [PMID: 23069578 DOI: 10.1016/j.lfs.2012.09.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2012] [Revised: 09/17/2012] [Accepted: 09/26/2012] [Indexed: 11/19/2022]
Abstract
AIMS To gain new insights into the molecular mechanisms of action of doxazosin, we investigated the prostatic stroma ultrastructure and the expression of genes involved with fibrosis, such as collagen type I and III (COL1A1 and COL3A1, respectively) and TGF-beta 1, in the rat ventral prostate. MAIN METHODS Adult Wistar rats were treated with doxazosin (25mg/kg/day), and the ventral prostates were excised at 7 and 30days after treatment. Untreated rats were controls. Ventral prostates were subjected to ultrastructural, immunohistochemical, biochemical and molecular analyses. KEY FINDINGS Doxazosin-treated prostates showed thickened bundles of collagen fibrils, activated fibroblasts, enlarged neurotransmitter vesicles and increased tissue immunostaining for collagen type I and type III when compared to untreated prostates. After 7 and 30days of doxazosin treatment mRNA expression of COL1A1 and COL3A1 was significantly increased and reduced, respectively, compared to the control group. TGF-beta 1 mRNA and protein levels were increased after 7days of doxazosin treatment, whereas only mRNA levels remained increased after 30days of treatment. SIGNIFICANCE Our data suggest that relaxation of smooth muscle cells by alpha-blockers interferes with the mechanical dynamics of the prostatic stroma extracellular matrix components, generating a pro-fibrotic effect probably via the TGF-beta 1 signaling pathway. Long term treatment with doxazosin may also lead to a reduced turnover of extracellular matrix components. Our results add to a better understanding of the molecular mechanisms behind the effects of alpha-blockade on prostatic histoarchitecture and the response to treatment for benign prostatic hyperplasia.
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Affiliation(s)
- Flávia K Delella
- Department of Structural and Functional Biology, Institute of Biology-University of Campinas (UNICAMP), Campinas, Sao Paulo, Brazil
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Ribeiro DL, Pinto ME, Maeda SY, Taboga SR, Góes RM. High fat-induced obesity associated with insulin-resistance increases FGF-2 content and causes stromal hyperplasia in rat ventral prostate. Cell Tissue Res 2012; 349:577-88. [PMID: 22661309 DOI: 10.1007/s00441-012-1420-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2011] [Accepted: 03/29/2012] [Indexed: 02/06/2023]
Abstract
Obesity affects sex hormone secretion, which can negatively influence prostatic structure, homeostasis, and disease. This investigation aimed to evaluate the repercussions of obesity induced by a high-fat diet on the rat prostate, with or without treatment with the aromatase inhibitor, Letrozole. Adult Wistar rats were fed a high-fat diet (20% saturated fat, O) for 15 weeks to induce obesity or received a balanced diet (4% fat, C). Then, a group of C and O rats were daily treated with Letrozole (1 mg/kg b.w. per day) for 2 weeks (CL and OL, respectively). Subsequently, ventral prostate was processed for analysis by transmission electron microscopy, immunohistochemistry, and Western blotting. Obesity decreased 70% of the testosterone plasma level. The prostate showed epithelial atrophy and dilated acini in the intermediate portion and epithelial wrinkling in the distal tips. The relative frequency of smooth muscle α-actin in the O group increased by 67%. Ultrastructurally, epithelial cells in obese animals presented altered secretory organelles, lipid droplets, and thicker subjacent fibromuscular layer. Letrozole treatment caused a partial restoration of the prostatic changes caused by obesity. Obesity increased the prostatic content of fibroblast growth factor-2 (FGF-2) by 150%, and Letrozole treatment increased this protein even more in the control and obese groups. This investigation shows that obesity provokes structural and ultrastructural changes in the epithelium of rat prostate; these changes might affect gland homeostasis and physiology. The epithelial and smooth muscle cell hyperplasia and increased FGF-2 expression observed in this experimental model of obesity/insulin-resistance might explain the high frequency of benign prostatic hyperplasia in insulin-resistant men.
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Affiliation(s)
- Daniele Lisboa Ribeiro
- Department of Histology, Institute of Biomedical Sciences, Federal University of Uberlandia, Uberlândia, Minas Gerais, Brazil
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Oliva SU, Scarano WR, Okada FK, Miraglia SM. Harmful effects of carbamazepine on the postnatal development of the rat ventral prostate. Reprod Biol Endocrinol 2012; 10:22. [PMID: 22443633 PMCID: PMC3344685 DOI: 10.1186/1477-7827-10-22] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2012] [Accepted: 03/25/2012] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Carbamazepine (CBZ) is a first-line antiepileptic drug (AED), although it is also used for the treatments of psychiatric disorders and neuropathic pain. The CBZ utilization has been associated with male reproductive damage, including hormonal alterations, sexual dysfunction and reduction of sperm quality. The wide and long-term use of the CBZ is a common schedule in children and adolescents and alters the testosterone level in adult rats and humans. The objective of this work was to evaluate the CBZ side effects on the ventral prostate of rats from pre-puberty to sexual maturation, since the prostate is an androgen-dependent organ. METHODS Twenty three day-old male albino Wistar rats received CBZ diluted in propylene glycol (20 mg/Kg/i.p via). The treatment lasted 20, 40 and 70 days, according to the different stages of the rat sexual maturation. At the end of each treatment period, ventral prostates were removed and histologically processed. The prostate sections were submitted to the histopathological, morphological and stereological analyses using image analysis system. RESULTS Reductions of the glandular epithelium, glandular lumen and fibromuscular stroma volume of the ventral prostate were observed in adult rats treated with CBZ since the weaning. Triggering and degranulation of mast cells were observed in the fibromuscular stroma of prepubertal and pubertal CBZ treated rats. CONCLUSIONS The results suggest a direct effect of the CBZ on rat ventral prostate, evidenced by increase of mast cell and macrophage populations during pre-puberty and puberty causing a ventral prostate accentuated damage in the adult phase.
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Affiliation(s)
- Samara U Oliva
- Department of Morphology and Genetics, Developmental Biology Laboratory, Federal University of São Paulo (UNIFESP), São Paulo, SP, Brazil
| | - Wellerson R Scarano
- Department of Morphology, São Paulo State University (UNESP), Botucatu, SP, Brazil
| | - Fatima K Okada
- Department of Morphology and Genetics, Developmental Biology Laboratory, Federal University of São Paulo (UNIFESP), São Paulo, SP, Brazil
| | - Sandra M Miraglia
- Department of Morphology and Genetics, Developmental Biology Laboratory, Federal University of São Paulo (UNIFESP), São Paulo, SP, Brazil
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Short-term stromal alterations in the rat ventral prostate following alloxan-induced diabetes and the influence of insulin replacement. Micron 2011; 43:326-33. [PMID: 22014851 DOI: 10.1016/j.micron.2011.09.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2011] [Revised: 09/21/2011] [Accepted: 09/22/2011] [Indexed: 12/18/2022]
Abstract
The stromal microenvironment is pivotal to prostate physiology and malign transformation. Diabetes leads to testosterone withdrawal and affects the prostate stromal compartment and smooth muscle cells in a similar way to that observed after castration. However the response of these cells and their involvement in extracellular matrix remodeling is not satisfactorily understood. We investigated the changes caused in the short term (one week) by alloxan-induced diabetes in the stromal components of the rat ventral prostate (VP) with an emphasis on morphological alterations of stromal cells, their conversion to a myofibroblast phenotype and the remodeling of extracellular matrix and the influence of insulin therapy. Adult male Wistar rats were assigned into untreated diabetic (n=12), insulin-treated (n=8) diabetic and control (n=10) groups. Diabetes was induced by means of the injection of alloxan (40 mg/kg b.w.), while the control animals received saline solution only. Insulin (5 UI) was administered daily for one week after diabetes diagnosis. Testosterone and estrogen plasma levels were determined. VP was analyzed using transmission electron microscopy. The main stromal cells were identified by means of light microscopy, using immunocytochemistry for specific markers - vimentin for fibroblasts, α-actin for smooth muscle cells (smc) and vimentin/calponin for myofibroblasts, following the estimation of their relative frequency and absolute volume by means of stereology. After one week diabetes led to a marked decrease in testosterone levels and an atrophy of about 35% in the VP. The relative frequency of smc and collagen fibers increased in the VP of diabetic rats but their absolute weight remained unchanged. Experimental diabetes promptly altered smc morphology which assumed at the ultrastructural level a shrunken appearance with the approximation of cytoplasmic dense bodies and also exhibited a decreased immunoreactivity to calponin. The conversion of stromal cells to a myofibroblast phenotype did not occur in alloxan-induced diabetes, as evaluated by double immunoreaction to calponin and vimentin. Insulin treatment maintained testosterone levels and preserved at least partly the cell morphology and collagen fiber organization of the prostate stroma in short-term diabetes. The apparent collagen increase observed by means of microscopic analysis in the stromal prostate compartment in the short term after diabetes is mainly associated with gland atrophy and does not involve the formation of new collagen fibers, the generation of myofibroblast-like cells or the acquisition of a secretory phenotype by stromal cells.
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Hormonal therapy in the senescence: Prostatic microenvironment structure and adhesion molecules. Micron 2011; 42:642-55. [DOI: 10.1016/j.micron.2011.03.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2011] [Accepted: 03/08/2011] [Indexed: 02/07/2023]
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Carvalho CAF, Pissolato M, Candido EM, Liberti EA, Cagnon VHA. Morphological alterations in the prostate stroma of rats submitted to chronic nicotine treatment. Microsc Res Tech 2011; 75:46-53. [PMID: 21618655 DOI: 10.1002/jemt.21023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2011] [Accepted: 03/26/2011] [Indexed: 01/15/2023]
Abstract
The stroma plays a fundamental role in the function of different glandular systems. In the prostate, the stroma is responsible for the development and maintenance of the differentiated state of the epithelium. Nicotine induces tobacco dependence and promotes morphological alterations in the epithelial compartment. However, its effects on the prostate stroma are unclear. The objective of this study was to evaluate the morphology of the stromal microenvironment in the ventral prostate lobe of rats submitted to chronic nicotine administration. Twenty rats (Rattus norvegicus) were divided into two groups: 10 animals received subcutaneous nicotine and 10 animals received physiological saline by the same route. After treatment, samples were collected from the ventral prostate lobe, processed and submitted to histology, histochemistry, and ultrastructural analysis by transmission and scanning electron microscopy. The level of circulating testosterone was also analyzed. The results showed a significant increase in the density of type I collagen (56.3% to 85.9%, P < 0.01) and a decrease in the density of type III collagen (43.7% to 14.1%, P < 0.01). In addition, there was a qualitative increase in elastic fibers and in the number of smooth muscle cells with a secretory phenotype. Circulating testosterone levels were significantly reduced (898.3 to 363.1 ng/mL, P < 0.01). The results showed that nicotine modifies different components of the prostate stroma, suggesting that this drug is a risk factor for morphofunctional alterations in the prostate gland.
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Porto EM, Santos SADAD, Ribeiro LM, Lacorte LM, Rinaldi JC, Justulin LA, Felisbino SL. Lobe variation effects of experimental diabetes and insulin replacement on rat prostate. Microsc Res Tech 2011; 74:1040-8. [DOI: 10.1002/jemt.20991] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2010] [Accepted: 12/30/2010] [Indexed: 01/01/2023]
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Campos SG, Gonçalves BF, Scarano WR, Ribeiro DL, Góes RM, Taboga SR. Prostatic stromal cells of old gerbils respond to steroidal blockades creating a microenvironment similar to reactive stroma. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.biomag.2011.05.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Delella FK, Felisbino SL. Doxazosin treatment alters stromal cell behavior and increases elastic system fibers deposition in rat prostate. Microsc Res Tech 2011; 73:1036-44. [PMID: 20155861 DOI: 10.1002/jemt.20828] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Doxazosin (DOX), an α-adrenoceptor antagonist, induces the relaxation of smooth muscle cell tonus and reduces the clinical symptoms of benign prostatic hyperplasia (BPH). However, the effects of DOX in the prostate stromal microenvironment are not fully known. In a previous study, we showed that DOX treatment for 30 days increased deposition of collagen fibers in the three rat prostatic lobes. Herein, we investigated the effects of DOX on stromal cell ultrastructure and elastic fiber deposition. Adult Wistar rats were treated with DOX (25 mg/kg/day); and the ventral, dorsal, and anterior prostates were excised at 30 days of treatment. The prostatic lobes were submitted to histochemical and stereological-morphometric analyze and transmission electron microscopy (TEM). Histochemical staining plus stereological analysis of the elastic fiber system showed that DOX-treated prostatic lobes presented more elaunin and elastic fibers than controls, mainly in the ventral lobe. Ultrastructural analysis showed that fibroblasts and smooth muscle cells from DOX-treated prostates presented active synthetic phenotypes, evidenced by enlarged rough endoplasmic reticulum and Golgi apparatus cisterns, and confirmed the observation of thickened elaunin fibers. Our findings suggest that, under α-adrenergic blockade by DOX, the fibroblasts become more active and smooth muscle cells shift from a predominantly contractile to a more synthetic phenotype. The deposition of collagen and elastic system fibers in the prostatic stroma may counterbalance the absence of smooth muscle tone during α-blockers treatment.
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Affiliation(s)
- Flávia Karina Delella
- Department of Cell Biology, Institute of Biology, UNICAMP-University of Campinas, Campinas, Sao Paulo, Brazil
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Lacorte LM, Delella FK, Porto Amorim EM, Justulin LA, Godinho AF, Almeida AA, Felipe Pinheiro PF, Amorim RL, Felisbino SL. Early changes induced by short-term low-dose cadmium exposure in rat ventral and dorsolateral prostates. Microsc Res Tech 2011; 74:988-97. [DOI: 10.1002/jemt.20985] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2010] [Accepted: 12/07/2010] [Indexed: 11/11/2022]
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Bianchi-Frias D, Vakar-Lopez F, Coleman IM, Plymate SR, Reed MJ, Nelson PS. The effects of aging on the molecular and cellular composition of the prostate microenvironment. PLoS One 2010; 5. [PMID: 20824135 PMCID: PMC2931699 DOI: 10.1371/journal.pone.0012501] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2010] [Accepted: 08/03/2010] [Indexed: 12/03/2022] Open
Abstract
Background Advancing age is associated with substantial increases in the incidence rates of common diseases affecting the prostate gland including benign prostatic hyperplasia (BPH) and prostate carcinoma. The prostate is comprised of a functional secretory epithelium, a basal epithelium, and a supporting stroma comprised of structural elements, and a spectrum of cell types that includes smooth muscle cells, fibroblasts, and inflammatory cells. As reciprocal interactions between epithelium and stromal constituents are essential for normal organogenesis and serve to maintain normal functions, discordance within the stroma could permit or promote disease processes. In this study we sought to identify aging-associated alterations in the mouse prostate microenvironment that could influence pathology. Methodology/Principal Findings We quantitated transcript levels in microdissected glandular-adjacent stroma from young (age 4 months) and old (age 20–24 months) C57BL/6 mice, and identified a significant change in the expression of 1259 genes (p<0.05). These included increases in transcripts encoding proteins associated with inflammation (e.g., Ccl8, Ccl12), genotoxic/oxidative stress (e.g., Apod, Serpinb5) and other paracrine-acting effects (e.g., Cyr61). The expression of several collagen genes (e.g., Col1a1 and Col3a1) exhibited age-associated declines. By histology, immunofluorescence, and electron microscopy we determined that the collagen matrix is abundant and disorganized, smooth muscle cell orientation is disordered, and inflammatory infiltrates are significantly increased, and are comprised of macrophages, T cells and, to a lesser extent, B cells. Conclusion/Significance These findings demonstrate that during normal aging the prostate stroma exhibits phenotypic and molecular characteristics plausibly contributing to the striking age associated pathologies affecting the prostate.
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Affiliation(s)
- Daniella Bianchi-Frias
- Divisions of Human Biology and Clinical Research, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
| | - Funda Vakar-Lopez
- Department of Pathology, University of Washington, Seattle, Washington, United States of America
| | - Ilsa M. Coleman
- Divisions of Human Biology and Clinical Research, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
| | - Stephen R. Plymate
- Department of Medicine, University of Washington, Seattle, Washington, United States of America
| | - May J. Reed
- Department of Medicine, University of Washington, Seattle, Washington, United States of America
| | - Peter S. Nelson
- Divisions of Human Biology and Clinical Research, Fred Hutchinson Cancer Research Center, Seattle, Washington, United States of America
- Department of Pathology, University of Washington, Seattle, Washington, United States of America
- Department of Medicine, University of Washington, Seattle, Washington, United States of America
- * E-mail:
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Bruni-Cardoso A, Augusto TM, Pravatta H, Damas-Souza DM, Carvalho HF. Stromal remodelling is required for progressive involution of the rat ventral prostate after castration: Identification of a matrix metalloproteinase-dependent apoptotic wave. ACTA ACUST UNITED AC 2010; 33:686-95. [DOI: 10.1111/j.1365-2605.2009.01004.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Alcoholism and coagulating gland: Androgen and insulin like growth factor-1 receptor features. Tissue Cell 2010; 42:203-10. [DOI: 10.1016/j.tice.2010.04.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2009] [Revised: 04/06/2010] [Accepted: 04/07/2010] [Indexed: 11/23/2022]
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Pinto LC, Fávaro WJ, Cagnon VHA. Proliferative, structural and molecular features of the Mdx mouse prostate. Int J Exp Pathol 2010; 91:408-19. [PMID: 20618884 DOI: 10.1111/j.1365-2613.2010.00722.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
The prostate is fundamental to the male reproductive process, and the stroma-epithelium interaction has an important role in prostate maintenance. Studies suggest that dystroglycan (DG) plays a role in cancer development in various organs. Thus, the aims of this work were to characterize morphological and proliferative features of the prostatic stroma and epithelium of mdx mice; to verify the immunolocalization of the α and β DG, IGF-1 and laminin α3 receptors; and to relate those structural and molecular events to prostate pathogenesis and to verify the viability of this experimental model in prostate studies. Thirty male mice (mdx and C57BL10/Uni) were divided into control and mdx groups. Samples from the ventral prostate were collected for immunological, Western Blotting, transmission electron microscopy and morphometric analyses. Oestradiol and testosterone measurements were verified. The results showed diminished testosterone and increased oestradiol levels in the mdx group. Atrophied cells and hypertrophied stroma were seen in the mdx mice. Weak α and β DG and laminin α3 immunolocalization was demonstrated in the mdx group. Intense insulin-like growth factor receptor α-1 (IGFRα-1) localization was identified in the mdx animals. Thus, mdx animals showed changes in molecular and structural integrity and proliferation signals, leading to glandular homoeostasis imbalance, and compromise of prostate function. Also, the steroid hormone imbalance and the increased IGF-1 receptor level detected in mdx mice could be considered as a crucial factor in the pathogenesis of prostatic disorders.
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Affiliation(s)
- Leslie C Pinto
- Department of Anatomy, Cell Biology, Physiology and Biophysic, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil
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Estofolete CF, Botelho-Machado C, Taboga SR, Zucoloto S, Polli-Lopes AC, Gil CD. Effects of myenteric denervation on extracellular matrix fibers and mast cell distribution in normal stomach and gastric lesions. Cancer Cell Int 2010; 10:18. [PMID: 20569458 PMCID: PMC2908609 DOI: 10.1186/1475-2867-10-18] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2010] [Accepted: 06/22/2010] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND In this study the effect of myenteric denervation induced by benzalconium chloride (BAC) on distribution of fibrillar components of extracellular matrix (ECM) and inflammatory cells was investigated in gastric carcinogenesis induced by N-methyl-N'-nitro-N-nitrosoguanidine (MNNG). Rats were divided in four experimental groups: non-denervated (I) and denervated stomach (II) without MNNG treatment; non-denervated (III) and denervated stomachs (IV) treated with MNNG. For histopathological, histochemical and stereological analysis, sections of gastric fragments were stained with Hematoxylin-Eosin, Picrosirius-Hematoxylin, Gomori reticulin, Weigert's Resorcin-Fuchsin, Toluidine Blue and Alcian-Blue/Safranin (AB-SAF). RESULTS BAC denervation causes an increase in the frequency of reticular and elastic fibers in the denervated (group II) compared to the non-denervated stomachs (group I). The treatment of the animals with MNNG induced the development of adenocarcinomas in non-denervated and denervated stomachs (groups III and IV, respectively) with a notable increase in the relative volume of the stroma, the frequency of reticular fibers and the inflammatory infiltrate that was more intense in group IV. An increase in the frequency of elastic fibers was observed in adenocarcinomas of denervated (group IV) compared to the non-denervated stomachs (group III) that showed degradation of these fibers. The development of lesions (groups III and IV) was also associated with an increase in the mast cell population, especially AB and AB-SAF positives, the latter mainly in the denervated group IV. CONCLUSIONS The results show a strong association in the morphological alteration of the ECM fibrillar components, the increased density of mast cells and the development of tumors induced by MNNG in the non-denervated rat stomach or denervated by BAC. This suggests that the study of extracellular and intracellular components of tumor microenvironment contributes to understanding of tumor biology by action of myenteric denervation.
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Affiliation(s)
- Cássia F Estofolete
- Department of Anatomy, School of Medicine - FAMERP, Avenida Brigadeiro Faria Lima 5416, CEP 15090-000, São José do Rio Preto, SP, Brazil.
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Peters H, Augusto TM, Bruni-cardoso A, Carvalho HF. RECK Expression in the Rat Ventral Prostate: Response to Castration Involves a Balance Between Epithelial and Stromal Expression. Anat Rec (Hoboken) 2010; 293:993-7. [DOI: 10.1002/ar.21140] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Justulin LA, Della-Coleta HHM, Taboga SR, Felisbino SL. Matrix metalloproteinase (MMP)-2 and MMP-9 activity and localization during ventral prostate atrophy and regrowth. ACTA ACUST UNITED AC 2010; 33:696-708. [PMID: 20059586 DOI: 10.1111/j.1365-2605.2009.01016.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Matrix metalloproteinses (MMPs) are enzymes involved in prostatic development, growth, disease-induced tissue remodelling and secretory fluid. Although the prostate function depends upon androgen regulation, the relationship between MMPs and androgen has not been well established. Here, we evaluated MMP-2 and MMP-9 gelatinolytic activity in association with tissue localization during ventral prostate atrophy and regrowth induced by testosterone replacement (TR). Adult male Wistar rats were divided into three experimental groups: control, castrated (CS) and TR 21 days after castration. Ventral prostate (VP) was excised at 3, 5, 7 and 21 days after castration in CS group, and at 3, 5, 7 and 10 days after TR (4 mg/kg/day) in TR group. The VP was dissected, weighed and processed for histology, immunohistochemistry, ultrastructure and zymography analyses. Castration elicited the typical parenchymal atrophy and stromal condensation. TR induced intense epithelial growth towards the stromal space to restore the prostate histoarchitecture. MMP-2 and MMP-9 immunostaining presented intense reaction in CS and TR groups, mainly in the epithelial and endothelial cells. After TR, a strong immunoreaction for MMP-2 was observed in the activated stromal fibroblasts. Zymography showed that MMP-2 and MMP-9 activity, mainly the active form, increased after castration. In contrast, TR induced an additional increase in MMP-2 activity, but not in MMP-9. In conclusion, the overall behaviour of MMP-2 and MMP-9 within the prostate under androgen handling is highly complex, as each glandular compartment and cell type is affected differently by the androgenic status. Prostate regrowth appears to involve a more effective participation of MMP-2 in both epithelial and stromal compartments, while MMP-9 plays a major role in the late prostate atrophy and early regrowth.
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Affiliation(s)
- L A Justulin
- Department of Cell Biology, Institute of Biology, University of Campinas (UNICAMP), Sao Paulo, Brazil.
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Ribeiro DL, Taboga SR, Góes RM. Diabetes induces stromal remodelling and increase in chondroitin sulphate proteoglycans of the rat ventral prostate. Int J Exp Pathol 2009; 90:400-11. [PMID: 19659898 DOI: 10.1111/j.1365-2613.2009.00657.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Extracellular matrix (ECM) remodelling is an important process involved in prostate cancer progression. Alterations in ECM caused by diabetes in different tissues such as kidney is well described; however, it is poorly investigated in prostate. The aim of this study was to evaluate changes in ECM of rat prostate showing gland atrophy caused by diabetes and their implications in development of malignant lesions. Diabetes was induced in Wistar rats using alloxan (45 mg/kg bw). After 90 days of diabetes onset, animals were killed and ventral prostate was removed and prepared for light microscopy following immunoreaction for fibronectin, chondroitin sulphate and Picrossirius staining for collagen fibres. Proteoglycans (PG) were identified at transmission electron microscopy after fixation with Cuprolinic Blue. Diabetes led to a thickening of 25% in the acinar basement membrane accompanied by increase and disorganization of its proteoglycans (P1). Three additional populations of prostatic stromal PGs were identified: collagen fibril linked (P2) and interstitial (P3) and (P4) PGs. Diabetes increased P3 and mainly P4 which had higher dimension and accumulated around the smooth muscle cells. In addition, an increase in chondrotin sulphate (33%, mainly in sites where P4 were noted) and collagen (44%) was noted in diabetic rats, whereas fibronectin did not change. Atrophic changes observed in rat ventral prostate after diabetes are accompanied by stromal remodelation related to increase in collagen and chondroitin sulphate proteoglycans. Thus, diabetes can promote a stromal microenvironment rich in elements that could favour cell migration, proliferation and pathological process.
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Affiliation(s)
- Daniele Lisboa Ribeiro
- Department of Cell Biology, Institute of Biology, State University of Campinas-Unicamp, Campinas, São Paulo, Brazil
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Corradi LS, Campos SGP, Santos FCA, Vilamaior PSL, Góes RM, Taboga SR. Long-term inhibition of 5-alpha reductase and aromatase changes the cellular and extracellular compartments in gerbil ventral prostate at different postnatal ages. Int J Exp Pathol 2009; 90:79-94. [PMID: 19200255 DOI: 10.1111/j.1365-2613.2008.00618.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
As local steroid metabolism controls the bioavailability of active steroidal hormones in the prostate, the aim of this study, was to investigate the effects of absence of 5-alpha reductase (5alpha-r) and aromatase (Aro) enzymes on prostatic cellular and extracellular components after long-term inhibition. Young, adult and old male Mongolian gerbils were treated orally, once a day, for 30 consecutive days, with Finasteride (10.0 mg/kg) and Letrozole (1.0 mg/kg) (5alpha-r and Aro enzymes inhibitors respectively) simultaneously or separately. Animals were killed on 1, 7, 14 and 21 days post-treatment. Data obtained after double or single enzymatic inhibition with Finasteride and Letrozole demonstrated marked remodelling of epithelial and stromal compartments. During the post-treatment period, particularly on the first and the last analysed days, prostatic epithelial cells showed decreased cytoplasmic volume and secretory activity. In the stroma, collagen fibres had accumulated in the epithelial base and among smooth muscle cells, which showed reduced diameter and condensed cytoplasm, and some of them had a highly irregular external contour. Also in the sub-epithelial area, some fibroblasts acquired an activated phenotype besides increased deposits of amorphous granular material. In conclusion, the inhibition of 5alpha-r and Aro enzymes affected, in a persistent manner, the structural and ultrastructural morphology of the prostate, irrespective of the gerbil's age. Hence these enzymes appear to be crucial in the maintenance of this gland during postnatal development. Also, these data bring more light to the complex issue of the mechanisms of local steroid metabolism and prostatic histology. Thus, the blockade of the steroid-metabolizing enzymes provided an important novel tool to study the relationship between sex steroids and normal physiology and diseases of the prostate.
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Affiliation(s)
- Lara S Corradi
- Department of Cell Biology, Institute of Biology, Campinas State University-UNICAMP, Campinas, São Paulo, Brazil
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Fávaro W, Padovani C, Cagnon V. Ultrastructural and proliferative features of the ventral lobe of the prostate in non-obese diabetic mice (NOD) following androgen and estrogen replacement associated to insulin therapy. Tissue Cell 2009; 41:119-32. [DOI: 10.1016/j.tice.2008.09.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2008] [Revised: 09/03/2008] [Accepted: 09/20/2008] [Indexed: 11/29/2022]
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