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He Z, Chang T, Chen Y, Wang H, Dai L, Zeng H. PARM1 Drives Smooth Muscle Cell Proliferation in Pulmonary Arterial Hypertension via AKT/FOXO3A Axis. Int J Mol Sci 2023; 24:ijms24076385. [PMID: 37047359 PMCID: PMC10094810 DOI: 10.3390/ijms24076385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 02/25/2023] [Accepted: 03/23/2023] [Indexed: 03/31/2023] Open
Abstract
Pulmonary arterial hypertension (PAH) is a group of severe, progressive, and debilitating diseases with limited therapeutic options. This study aimed to explore novel therapeutic targets in PAH through bioinformatics and experiments. Weighted gene co-expression network analysis (WGCNA) was applied to detect gene modules related to PAH, based on the GSE15197, GSE113439, and GSE117261. GSE53408 was applied as validation set. Subsequently, the validated most differentially regulated hub gene was selected for further ex vivo and in vitro assays. PARM1, TSHZ2, and CCDC80 were analyzed as potential intervention targets for PAH. Consistently with the bioinformatic results, our ex vivo and in vitro data indicated that PARM1 expression increased significantly in the lung tissue and/or pulmonary artery of the MCT-induced PAH rats and hypoxia-induced PAH mice in comparison with the respective controls. Besides, a similar expression pattern of PARM1 was found in the hypoxia- and PDGF--treated isolated rat primary pulmonary arterial smooth muscle cells (PASMCs). In addition, hypoxia/PDGF--induced PARM1 protein expression could promote the elevation of phosphorylation of AKT, phosphorylation of FOXO3A and PCNA, and finally the proliferation of PASMCs in vitro, whereas PARM1 siRNA treatment inhibited it. Mechanistically, PARM1 promoted PAH via AKT/FOXO3A/PCNA signaling pathway-induced PASMC proliferation.
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Glavan D, Gheorman V, Gresita A, Hermann DM, Udristoiu I, Popa-Wagner A. Identification of transcriptome alterations in the prefrontal cortex, hippocampus, amygdala and hippocampus of suicide victims. Sci Rep 2021; 11:18853. [PMID: 34552157 PMCID: PMC8458545 DOI: 10.1038/s41598-021-98210-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 08/30/2021] [Indexed: 11/09/2022] Open
Abstract
Suicide is one of the leading causes of death globally for all ages, and as such presents a very serious problem for clinicians worldwide. However, the underlying neurobiological pathology remains to a large extent unknown. In order to address this gap, we have carried out a genome-wide investigation of the gene expression in the amygdala, hippocampus, prefrontal cortex and thalamus in post-mortem brain samples obtained from 20 suicide completers and 7 control subjects. By KEGG enrichment analysis indicated we identified novel clusters of downregulated pathways involved in antigen neutralization and autoimmune thyroid disease (amygdala, thalamus), decreased axonal plasticity in the hippocampus. Two upregulated pathways were involved in neuronal death in the hippocampus and olfactory transduction in the thalamus and the prefrontal cortex. Autoimmune thyroid disease pathway was downregulated only in females. Metabolic pathways involved in Notch signaling amino acid metabolism and unsaturated lipid synthesis were thalamus-specific. Suicide-associated changes in the expression of several genes and pseudogenes that point to various functional mechanisms possibly implicated in the pathology of suicide. Two genes (SNORA13 and RNU4-2) involved in RNA processing were common to all brain regions analyzed. Most of the identified gene expression changes were related to region-specific dysregulated manifestation of genetic and epigenetic mechanisms underlying neurodevelopmental disorders (SNORD114-10, SUSd1), motivation, addiction and motor disorders (CHRNA6), long-term depression (RAB3B), stress response, major depression and schizophrenia (GFAP), signal transduction at the neurovascular unit (NEXN) and inhibitory neurotransmission in spatial learning, neural plasticity (CALB2; CLIC6, ENPP1). Some of the differentially expressed genes were brain specific non-coding RNAs involved in the regulation of translation (SNORA13). One, (PARM1) is a potential oncogene and prognostic biomarker for colorectal cancer with no known function in the brain. Disturbed gene expression involved in antigen neutralization, autoimmunity, neural plasticity, stress response, signal transduction at the neurovascular unit, dysregulated nuclear RNA processing and translation and epigenetic imprinting signatures is associated with suicide and point to regulatory non-coding RNAs as potential targets of new drugs development.
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Affiliation(s)
- Daniela Glavan
- Department of Psychiatry, University of Medicine and Pharmacy, Craiova, Romania
| | - Victor Gheorman
- Department of Psychiatry, University of Medicine and Pharmacy, Craiova, Romania
| | - Andrei Gresita
- Griffith University Menzies Health Institute of Queensland, Gold Coast Campus, Brisbane, QLD, 4000, Australia
| | - Dirk M Hermann
- Chair of Vascular Neurology, Dementia and Ageing Research, Department of Neurology, University Hospital Essen, University of Duisburg, Essen, Germany
| | - Ion Udristoiu
- Department of Psychiatry, University of Medicine and Pharmacy, Craiova, Romania.
| | - Aurel Popa-Wagner
- Griffith University Menzies Health Institute of Queensland, Gold Coast Campus, Brisbane, QLD, 4000, Australia. .,Chair of Vascular Neurology, Dementia and Ageing Research, Department of Neurology, University Hospital Essen, University of Duisburg, Essen, Germany.
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Strömvall K, Thysell E, Halin Bergström S, Bergh A. Aggressive rat prostate tumors reprogram the benign parts of the prostate and regional lymph nodes prior to metastasis. PLoS One 2017; 12:e0176679. [PMID: 28472073 PMCID: PMC5417597 DOI: 10.1371/journal.pone.0176679] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Accepted: 04/14/2017] [Indexed: 12/14/2022] Open
Abstract
In order to grow and spread tumors need to interact with adjacent tissues. We therefore hypothesized that small but aggressive prostate cancers influence the rest of the prostate and regional lymph nodes differently than tumors that are more indolent. Poorly metastatic (Dunning AT1) or highly metastatic (Dunning MLL) rat prostate tumor cells were injected into the ventral prostate lobe of immunocompetent rats. After 10 days—when the tumors occupied about 30% of the prostate lobe and lymph node metastases were undetectable—the global gene expression in tumors, benign parts of the prostate, and regional iliac lymph nodes were examined to define tumor-induced changes related to preparation for future metastasis. The tumors induced profound effects on the gene expression profiles in the benign parts of the prostate and these were strikingly different in the two tumor models. Gene ontology enrichment analysis suggested that tumors with high metastatic capacity were more successful than less metastatic tumors in inducing tumor-promoting changes and suppressing anti-tumor immune responses in the entire prostate. Some of these differences such as altered angiogenesis, nerve density, accumulation of T-cells and macrophages were verified by immunohistochemistry. Gene expression alterations in the regional lymph nodes suggested decreased quantity and activation of immune cells in MLL-lymph nodes that were also verified by immunostaining. In summary, even when small highly metastatic prostate tumors can affect the entire tumor-bearing organ and pre-metastatic lymph nodes differently than less metastatic tumors. When the kinetics of these extratumoral influences (by us named TINT = tumor instructed normal tissue) are more precisely defined they could potentially be used as markers of disease aggressiveness and become therapeutic targets.
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Affiliation(s)
- Kerstin Strömvall
- Department of Medical Biosciences, Pathology, Umeå University, Umeå, Sweden
- * E-mail:
| | - Elin Thysell
- Department of Medical Biosciences, Pathology, Umeå University, Umeå, Sweden
| | | | - Anders Bergh
- Department of Medical Biosciences, Pathology, Umeå University, Umeå, Sweden
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Campos SG, Gonçalves BF, Scarano WR, Góes RM, Taboga SR. Phenotypic and metabolic aspects of prostatic epithelial cells in aged gerbils after antisteroidal therapy: turnover in the state of chromatin condensation and androgen-independent cell replacement. Acta Histochem 2014; 116:204-13. [PMID: 23942056 DOI: 10.1016/j.acthis.2013.07.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Revised: 07/02/2013] [Accepted: 07/03/2013] [Indexed: 10/26/2022]
Abstract
The gerbil is a rodent considered a good model for studies of prostatic morphophysiology under different experimental conditions. Studies involving castration and steroidal blockers of aged gerbils showed that the glandular epithelium persists after long-term therapy, preventing the organ atrophy. Thus, the objective of this study was to evaluate the phenotypic characteristics and behavior of prostatic epithelial cells that remained after different periods of hormone ablation in aged gerbils. The identification of elements that influenced the survival of this cell type was performed by morphometric, nuclear phenotypes, ultrastructural and immune histochemical analysis. The most significant responses to treatment, by analyzing morphometric features, were observed during the first three time points (day 1, day 3, and day 7), after which there appeared to be an adjustment of the gland to the hormone ablation. All treatments led to changes in the state of chromatin condensation, DNA methylation pattern and phenotypic changes indicated cell senescence. Additionally, an increase in the basal cells seemed to guarantee self-renewal properties to the epithelium. These data indicate that changes occur at many levels, including gene expression and nuclear architecture in the epithelial cells, when aging and steroidal blockade are associated. These aspects are important when considering castration-resistant prostate cancer, a malignant tumor posing difficult therapeutic intervention.
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Park JY, Jang H, Curry TE, Sakamoto A, Jo M. Prostate androgen-regulated mucin-like protein 1: a novel regulator of progesterone metabolism. Mol Endocrinol 2013; 27:1871-86. [PMID: 24085821 DOI: 10.1210/me.2013-1097] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The LH surge reprograms preovulatory follicular cells to become terminally differentiated luteal cells which produce high levels of progesterone and become resistant to apoptosis. PARM1 (prostate androgen regulated mucin-like protein 1) has been implicated in cell differentiation and cell survival in nonovarian cells, but little is known about PARM1 in the ovary. This study demonstrated that the LH surge induced a dramatic increase in Parm1 expression in periovulatory follicles and newly forming CL in both cycling and immature rat models. We further demonstrated that hCG increases Parm1 expression in granulosa cell cultures. The in vitro up-regulation of Parm1 expression was mediated by hCG-activated multiple signaling pathways and transcriptional activation of this gene. Parm1 knockdown increased the viability of cultured granulosa cells but resulted in a decrease in progesterone levels. The inhibitory effect of Parm1 silencing on progesterone was reversed by adenoviral mediated add-back expression of Parm1. Parm1 silencing had little effect on the expression of genes involved in progesterone biosynthesis and metabolism such as Scarb1, Ldlr, Vldlr, Scp2, Star, Cyp11a1, Hsd3b, and Srd5a1, while decreasing the expression of Akr1c3. Analyses of culture media steroid levels revealed that Parm1 knockdown had no effect on pregnenolone levels, while resulting in time-dependent decreases in progesterone and 20α-dihydroprogesterone and accelerated accumulation of 5α-pregnanediol. This study revealed that the up-regulation of Parm1 expression promotes progesterone and 20α-dihydroprogesterone accumulation in luteinizing granulosa cells by inhibiting progesterone catabolism to 5α-pregnanediol. PARM1 contributes to ovulation and/or luteal function by acting as a novel regulator of progesterone metabolism.
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Affiliation(s)
- Ji Yeon Park
- Department of Obstetrics and Gynecology, Chandler Medical Center, 800 Rose Street, Room MS 335, University of Kentucky, Lexington, Kentucky 40536-0298.
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Charfi C, Levros LC, Edouard E, Rassart E. Characterization and identification of PARM-1 as a new potential oncogene. Mol Cancer 2013; 12:84. [PMID: 23902727 PMCID: PMC3750824 DOI: 10.1186/1476-4598-12-84] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Accepted: 07/25/2013] [Indexed: 11/21/2022] Open
Abstract
Background The Graffi murine retrovirus is a powerful tool to find leukemia associated oncogenes. Using DNA microarrays, we recently identified several genes specifically deregulated in T- and B-leukemias induced by this virus. Results In the present study, probsets associated with T-CD8+ leukemias were analyzed and we validated the expression profile of the Parm-1 gene. PARM-1 is a member of the mucin family. We showed that human PARM-1 is an intact secreted protein accumulating predominantly, such as murine PARM-1, at the Golgi and in the early and late endosomes. PARM-1 colocalization with α-tubulin suggests that its trafficking within the cell involves the microtubule cytoskeleton. Also, the protein co-localizes with caveolin-1 which probably mediates its internalization. Transient transfection of both mouse and human Parm-1 cDNAs conferred anchorage- and serum-independent growth and enhanced cell proliferation. Moreover, deletion mutants of human PARM-1 without either extracellular or cytoplasmic portions seem to retain the ability to induce anchorage-independent growth of NIH/3T3 cells. In addition, PARM-1 increases ERK1/2, but more importantly AKT and STAT3 phosphorylation. Conclusions Our results strongly suggest the oncogenic potential of PARM-1.
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Affiliation(s)
- Cyndia Charfi
- Laboratoire de Biologie Moléculaire, Département des Sciences Biologiques, Centre BioMed, Université du Québec à Montréal, Case Postale 8888, Succursale Centre-ville, Montréal, QC H3C-3P8, Canada
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Nakanishi N, Takahashi T, Ogata T, Adachi A, Imoto-Tsubakimoto H, Ueyama T, Matsubara H. PARM-1 promotes cardiomyogenic differentiation through regulating the BMP/Smad signaling pathway. Biochem Biophys Res Commun 2012; 428:500-5. [PMID: 23123625 DOI: 10.1016/j.bbrc.2012.10.078] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Accepted: 10/20/2012] [Indexed: 11/18/2022]
Abstract
PARM-1, prostatic androgen repressed message-1, is an endoplasmic reticulum (ER) molecule that is involved in ER stress-induced apoptosis in cardiomyocytes. In this study, we assessed whether PARM-1 plays a role in the differentiation of stem cells into cardiomyocytes. While PARM-1 was not expressed in undifferentiated P19CL6 embryonic carcinoma cells, PARM-1 expression was induced during cardiomyogenic differentiation. This expression followed expression of mesodermal markers, and preceded expression of cardiac transcription factors. PARM-1 overexpression did not alter the expression of undifferentiated markers and the proliferative property in undifferentiated P19CL6 cells. Expression of cardiac transcription factors during cardiomyogenesis was markedly enhanced by overexpression of PARM-1, while expression of mesodermal markers was not altered, suggesting that PARM-1 is involved in the differentiation from the mesodermal lineage to cardiomyocytes. Furthermore, overexpression of PARM-1 induced BMP2 mRNA expression in undifferentiated P19CL6 cells and enhanced both BMP2 and BMP4 mRNA expression in the early phase of cardiomyogenesis. PARM-1 overexpression also enhanced phosphorylation of Smads1/5/8. Thus, PARM-1 plays an important role in the cardiomyogenic differentiation of P19CL6 cells through regulating BMP/Smad signaling pathways, demonstrating a novel role of PARM-1 in the cardiomyogenic differentiation of stem cells.
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Affiliation(s)
- Naohiko Nakanishi
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan
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Wittler L, Hilger A, Proske J, Pennimpede T, Draaken M, Ebert AK, Rösch W, Stein R, Nöthen MM, Reutter H, Ludwig M. Murine expression and mutation analyses of the prostate androgen-regulated mucin-like protein 1 (Parm1) gene, a candidate for human epispadias. Gene 2012; 506:392-5. [PMID: 22766399 DOI: 10.1016/j.gene.2012.06.082] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2012] [Revised: 06/20/2012] [Accepted: 06/25/2012] [Indexed: 10/28/2022]
Abstract
BACKGROUND Epispadias is the mildest phenotype of the human bladder exstrophy-epispadias complex (BEEC), and presents with varying degrees of severity. This urogenital birth defect results from a disturbance in the septation process, during which separate urogenital and anorectal components are formed through division of the cloaca. This process is reported to be influenced by androgen signaling. The human PARM1 gene encodes the prostate androgen-regulated mucin-like protein 1, which is expressed in heart, kidney, and placenta. METHODS We performed whole mount in situ hybridization analysis of Parm1 expression in mouse embryos between gestational days (GD) 9.5 and 12.5, which are equivalent to human gestational weeks 4-6. Since the spatio-temporal localization of Parm1 corresponded to tissues which are affected in human epispadias, we sequenced PARM1 in 24 affected patients. RESULTS We found Parm1 specifically expressed in the region of the developing cloaca, the umbilical cord, bladder anlage, and the urethral component of the genital tubercle. Additionally, Parm1 expression was detected in the muscle progenitor cells of the somites and head mesenchyme. PARM1 gene analysis revealed no alterations in the coding region of any of the investigated patients. CONCLUSIONS These findings suggest that PARM1 does not play a major role in the development of human epispadias. However, we cannot rule out the possibility that a larger sample size would enable detection of rare mutations in this gene.
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Affiliation(s)
- Lars Wittler
- Department of Developmental Genetics, Max-Planck-Institute for Molecular Genetics, Berlin, Germany
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PARM-1 is an endoplasmic reticulum molecule involved in endoplasmic reticulum stress-induced apoptosis in rat cardiac myocytes. PLoS One 2010; 5:e9746. [PMID: 20305782 PMCID: PMC2841187 DOI: 10.1371/journal.pone.0009746] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2009] [Accepted: 02/28/2010] [Indexed: 01/08/2023] Open
Abstract
To identify novel transmembrane and secretory molecules expressed in cardiac myocytes, signal sequence trap screening was performed in rat neonatal cardiac myocytes. One of the molecules identified was a transmembrane protein, prostatic androgen repressed message-1 (PARM-1). While PARM-1 has been identified as a gene induced in prostate in response to castration, its function is largely unknown. Our expression analysis revealed that PARM-1 was specifically expressed in hearts and skeletal muscles, and in the heart, cardiac myocytes, but not non-myocytes expressed PARM-1. Immunofluorescent staining showed that PARM-1 was predominantly localized in endoplasmic reticulum (ER). In Dahl salt-sensitive rats, high-salt diet resulted in hypertension, cardiac hypertrophy and subsequent heart failure, and significantly stimulated PARM-1 expression in the hearts, with a concomitant increase in ER stress markers such as GRP78 and CHOP. In cultured cardiac myocytes, PARM-1 expression was stimulated by proinflammatory cytokines, but not by hypertrophic stimuli. A marked increase in PARM-1 expression was observed in response to ER stress inducers such as thapsigargin and tunicamycin, which also induced apoptotic cell death. Silencing PARM-1 expression by siRNAs enhanced apoptotic response in cardiac myocytes to ER stresses. PARM-1 silencing also repressed expression of PERK and ATF6, and augmented expression of CHOP without affecting IRE-1 expression and JNK and Caspase-12 activation. Thus, PARM-1 expression is induced by ER stress, which plays a protective role in cardiac myocytes through regulating PERK, ATF6 and CHOP expression. These results suggested that PARM-1 is a novel ER transmembrane molecule involved in cardiac remodeling in hypertensive heart disease.
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Song SH, Hong YH, Sasaki SI, Roh SG, Katoh K. Prostatic androgen-repressed message-1 as a regulator of adipocyte differentiation in the mouse. TOHOKU J EXP MED 2010; 219:311-7. [PMID: 19966531 DOI: 10.1620/tjem.219.311] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Adipocyte differentiation is an important aspect in energy homeostasis. Although the regulation of adipocyte differentiation is relatively well understood, the underlying molecular mechanism remains unclear. In this study, subcutaneous and epididymal adipose tissues were used to study the differential expression of associated genes. We found that the expression level of mouse homologue of rat prostatic androgen-repressed message-1 (mPARM-1) gene was higher in subcutaneous, perirenal and mesenteric adipose tissues than in epididymal adipose tissue. In mouse subcutaneous, perirenal, and mesenteric adipose tissues, the expression level of this gene was higher in adipocytes than in non-adipocyte cells, i.e. stromal-vascular cells. Furthermore, mPARM-1 mRNA expression was up-regulated in subcutaneous, mesenteric, and epididymal adipose tissues of mice fed a high-fat diet compared to those fed a normal-fat diet. Expression level of mPARM-1 mRNA increased in the early stage of the chemically induced adipocyte differentiation, preceding the increase in peroxisome proliferator-activated receptor-gamma 2 (PPAR-gamma2) mRNA. Tumor necrosis factor-alpha (TNF-alpha), an inhibitor of adipocyte differentiation, reduced the expression of mPARM-1 mRNA in differentiated 3T3-L1 cells and subsequently down-regulated the expression of adipogenic genes, including PPAR-gamma2, leptin and adipogenin. Moreover, knockdown of mPARM-1 expression with siRNA reduced lipid accumulation and the expression levels of PPAR-gamma2 and adipocyte protein 2 mRNAs, which suggest that the degree of adipocyte differentiation of 3T3-L1 cells has been reduced. These results indicate that mPARM-1 might be involved in the regulation of fat accumulation and adipocyte differentiation.
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Affiliation(s)
- Sang-Houn Song
- Lab of Animal Physiology, Graduate School of Agriculture Science, Tohoku University, Sendai, Japan
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Fladeby C, Gupta SN, Barois N, Lorenzo PI, Simpson JC, Saatcioglu F, Bakke O. Human PARM-1 is a novel mucin-like, androgen-regulated gene exhibiting proliferative effects in prostate cancer cells. Int J Cancer 2008; 122:1229-35. [PMID: 18027867 DOI: 10.1002/ijc.23185] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
In this paper we characterize hPARM-1, the human ortholog of rat PARM-1 (prostatic androgen-repressed message-1) and demonstrate its role in prostate cancer. Immunofluorescence microscopy and ultrastructural analysis revealed the localization of hPARM-1 to Golgi, plasma membrane and the early endocytic pathway but not in lysosomes. Biochemical and deglycosylation studies showed hPARM-1 as a highly glycosylated, mucin-like type I transmembrane protein. Analysis of expression of hPARM-1 in various human tissues revealed its presence in most human tissues with especially high expression in heart, kidney and placenta. Androgen controls the expression of the gene as a marked 7-fold increase is seen in the androgen-dependent prostate cancer cell line, LNCaP on androgen stimulation. This is further supported by its decrease in expression in CWR22 xenograft upon castration. Moreover, ectopic expression of hPARM-1 in PC3 prostate cancer cells increased colony formation, suggesting a probable role in cell proliferation. These results suggest that hPARM-1 may have a role in normal biology of the prostate cell and in prostate cancer.
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Affiliation(s)
- Cathrine Fladeby
- Department of Molecular Biosciences, University of Oslo, Oslo, Norway
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Grimm J, Mueller A, Hefti F, Rosenthal A. Molecular basis for catecholaminergic neuron diversity. Proc Natl Acad Sci U S A 2004; 101:13891-6. [PMID: 15353588 PMCID: PMC518849 DOI: 10.1073/pnas.0405340101] [Citation(s) in RCA: 109] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Catecholaminergic neurons control diverse cognitive, motor, and endocrine functions and are associated with multiple psychiatric and neurodegenerative disorders. We present global gene-expression profiles that define the four major classes of dopaminergic (DA) and noradrenergic neurons in the brain. Hypothalamic DA neurons and noradrenergic neurons in the locus coeruleus display distinct group-specific signatures of transporters, channels, transcription, plasticity, axon-guidance, and survival factors. In contrast, the transcriptomes of midbrain DA neurons of the substantia nigra and the ventral tegmental area are closely related with <1% of differentially expressed genes. Transcripts implicated in neural plasticity and survival are enriched in ventral tegmental area neurons, consistent with their role in schizophrenia and addiction and their decreased vulnerability in Parkinson's disease. The molecular profiles presented provide a basis for understanding the common and population-specific properties of catecholaminergic neurons and will facilitate the development of selective drugs.
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Affiliation(s)
- Jan Grimm
- Rinat Neuroscience, 3155 Porter Drive, Palo Alto, CA 94304, USA.
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Cornet AM, Hanon E, Reiter ER, Bruyninx M, Nguyen VH, Hennuy BR, Hennen GP, Closset JL. Prostatic androgen repressed message-1 (PARM-1) may play a role in prostatic cell immortalisation. Prostate 2003; 56:220-30. [PMID: 12772192 DOI: 10.1002/pros.10254] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND Prostatic androgen-repressed message-1 (PARM-1) has been cloned from the prostate. The transcript of the PARM-1 gene is overexpressed during regression of the prostate after androgen withdrawal. The regulation of PARM-1 by androgens is limited to this organ. We have studied the effects of PARM-1 overexpression in malignant prostate cells. METHODS The PARM-1 cDNA was introduced into the rat cancer cell line MAT LyLu along with a doxycycline-dependent regulator. RESULTS Maximal expression of PARM-1 (fivefold induction) was achieved by incubating the cells with 2 microM doxycycline for 48 hr. A study investigating the effect of PARM-1 overexpression on the transcription of 588 genes has shown that the TLP1 gene (encoding rat telomerase protein component 1) was the most up-regulated (fourfold). In addition, a dose-dependent increase in telomerase activity was observed in cells overexpressing PARM-1. In vivo, the androgen-deprived prostate showed an increased TLP1 level and increased telomerase activity. CONCLUSIONS Increased telomerase activity is often associated with the immortalisation of cancer cell lines, particularly prostatic ones. This could mean that PARM-1 is involved, via increased telomerase activity, in a survival program enabling certain prostatic cells to resist apoptosis, thus conferring a selective advantage to pre-cancerous or cancerous cells.
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Affiliation(s)
- Anne M Cornet
- Biochemistry and Laboratory of Endocrinology, Insitute of Pathology B23, avenue de l'Hôpital 3, University of Liège, 4000 Liège, Belgium
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Li Y, Friel PJ, McLean DJ, Griswold MD. Cystatin E1 and E2, new members of male reproductive tract subgroup within cystatin type 2 family. Biol Reprod 2003; 69:489-500. [PMID: 12700194 DOI: 10.1095/biolreprod.102.014100] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
The family of type 2 cystatin proteins is a class of cysteine proteinase inhibitors that function as potent inhibitors of papain-like cysteine proteinases. Recent studies have suggested that cystatins in the male reproductive tract subgroup may perform functions distinct from those of typical cystatins. The objective of the present study was to identify and characterize the expression of new gene members of the cystatin family 2 in mouse male reproductive tissues. Two new members of cystatin family 2, named mouse Cystatin E1 and mouse Cystatin E2 (mCST E1 and mCST E2, respectively), were identified in mice by searching the National Center for Biotechnology Information database for proteins containing homology to known type 2 cystatins. Human CST E1 has recently been reported independently under the name CST 11. The deduced amino acid sequences of these genes have significant homology with the family 2 cystatins, including four conserved cysteine residues at the C-terminus. Similar to other male reproductive subgroup cystatins, the inhibitory motifs are not well conserved in these genes. Northern blot analyses showed that both genes were highly expressed only in the epididymis. In situ hybridization demonstrated that both genes were restricted in their expression to the epithelial cells of the caput and that the highest expression was localized to the initial segment of caput epididymis. Northern blot analyses and in situ hybridization showed that both mCST E1 and E2 mRNA decreased after castration, and treatment with testosterone propionate (T) did not maintain expression of these genes. In fact, T treatment further repressed the expression of these genes in the epididymis following castration. Efferent ductule ligation resulted in a dramatic decrease of epididymal expression of mCST E1 and E2. The expression of mCST E1 mRNA was up-regulated by 17 beta-estradiol (E) administration for 7 days postcastration, whereas no recovery of mCST E1 mRNA level was detected after 14 days of E treatment. Combined E and T (E+T) treatment for 1 and 2 wk reduced the mCST E1 transcripts. The expression of mCST E2 mRNA was maintained by E administration for both 7 and 14 days after castration, whereas treatment of both T and E repressed the expression of mCST E2. Although both mCST E1 and E2 share significant homology with family 2 cystatins, including similar distribution in tissues and localization in epididymis, these genes may have different functions, because their regulation involves different hormones and, probably, other testicular factors.
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Affiliation(s)
- Ying Li
- Center for Reproductive Biology, School of Molecular Biosciences, Washington State University, Pullman, Washington 99164, USA
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