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Maranto C, Sabharwal L, Udhane V, Pitzen SP, McCluskey B, Qi S, O’Connor C, Devi S, Johnson S, Jacobsohn K, Banerjee A, Iczkowski KA, Wang L, Dehm SM, Nevalainen MT. Stat5 induces androgen receptor ( AR) gene transcription in prostate cancer and offers a druggable pathway to target AR signaling. SCIENCE ADVANCES 2024; 10:eadi2742. [PMID: 38416822 PMCID: PMC10901378 DOI: 10.1126/sciadv.adi2742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 01/24/2024] [Indexed: 03/01/2024]
Abstract
Androgen receptor (AR) drives prostate cancer (PC) growth and progression, and targeting AR signaling is the mainstay of pharmacological therapies for PC. Resistance develops relatively fast as a result of refueled AR activity. A major gap in the field is the lack of understanding of targetable mechanisms that induce persistent AR expression in castrate-resistant PC (CRPC). This study uncovers an unexpected function of active Stat5 signaling, a known promoter of PC growth and clinical progression, as a potent inducer of AR gene transcription. Stat5 suppression inhibited AR gene transcription in preclinical PC models and reduced the levels of wild-type, mutated, and truncated AR proteins. Pharmacological Stat5 inhibition by a specific small-molecule Stat5 inhibitor down-regulated Stat5-inducible genes as well as AR and AR-regulated genes and suppressed PC growth. This work introduces the concept of Stat5 as an inducer of AR gene transcription in PC. Pharmacological Stat5 inhibitors may represent a new strategy for suppressing AR and CRPC growth.
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Affiliation(s)
- Cristina Maranto
- Department of Pathology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Lavannya Sabharwal
- Department of Pathology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Vindhya Udhane
- Department of Pathology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Samuel P. Pitzen
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455, USA
- Graduate Program in Molecular, Cellular, and Developmental Biology and Genetics, University of Minnesota, Minneapolis, MN 55455, USA
| | - Braedan McCluskey
- Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, MN 55455, USA
| | - Songyan Qi
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455, USA
- Graduate Program in Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, MN 55455, USA
| | - Christine O’Connor
- Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, MN 55455, USA
| | - Savita Devi
- Department of Pathology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Scott Johnson
- Department of Urology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Kenneth Jacobsohn
- Department of Urology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Anjishnu Banerjee
- Institute for Health and Equity, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | | | - Liang Wang
- Department of Tumor Biology, Moffitt Cancer Center, 12902 USF Magnolia Drive, Tampa, FL 33612, USA
| | - Scott M. Dehm
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455, USA
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN 55455, USA
- Department of Urology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Marja T. Nevalainen
- Department of Pathology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
- Department of Pharmacology, Physiology and Cancer Biology, Sidney Kimmel Cancer Center at Jefferson Health, Thomas Jefferson University, Philadelphia, PA 19107, USA
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2
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Ikram S, Rege A, Negesse MY, Casanova AG, Reynoird N, Green EM. The SMYD3-MAP3K2 signaling axis promotes tumor aggressiveness and metastasis in prostate cancer. SCIENCE ADVANCES 2023; 9:eadi5921. [PMID: 37976356 PMCID: PMC10656069 DOI: 10.1126/sciadv.adi5921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Accepted: 10/18/2023] [Indexed: 11/19/2023]
Abstract
Aberrant activation of Ras/Raf/mitogen-activated protein kinase (MAPK) signaling is frequently linked to metastatic prostate cancer (PCa); therefore, the characterization of modulators of this pathway is critical for defining therapeutic vulnerabilities for metastatic PCa. The lysine methyltransferase SET and MYND domain 3 (SMYD3) methylates MAPK kinase kinase 2 (MAP3K2) in some cancers, causing enhanced activation of MAPK signaling. In PCa, SMYD3 is frequently overexpressed and associated with disease severity; however, its molecular function in promoting tumorigenesis has not been defined. We demonstrate that SMYD3 critically regulates tumor-associated phenotypes via its methyltransferase activity in PCa cells and mouse xenograft models. SMYD3-dependent methylation of MAP3K2 promotes epithelial-mesenchymal transition associated behaviors by altering the abundance of the intermediate filament vimentin. Furthermore, activation of the SMYD3-MAP3K2 signaling axis supports a positive feedback loop continually promoting high levels of SMYD3. Our data provide insight into signaling pathways involved in metastatic PCa and enhance understanding of mechanistic functions for SMYD3 to reveal potential therapeutic opportunities for PCa.
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Affiliation(s)
- Sabeen Ikram
- Department of Biological Sciences, University of Maryland Baltimore County, Baltimore, MD, USA
| | - Apurv Rege
- Department of Biological Sciences, University of Maryland Baltimore County, Baltimore, MD, USA
| | - Maraki Y. Negesse
- Department of Biological Sciences, University of Maryland Baltimore County, Baltimore, MD, USA
| | - Alexandre G. Casanova
- Grenoble Alpes University, CNRS UMR5309, INSERM U1209, Institute for Advanced Biosciences, Grenoble, France
| | - Nicolas Reynoird
- Grenoble Alpes University, CNRS UMR5309, INSERM U1209, Institute for Advanced Biosciences, Grenoble, France
| | - Erin M. Green
- Department of Biological Sciences, University of Maryland Baltimore County, Baltimore, MD, USA
- Marlene and Stewart Greenebaum Comprehensive Cancer Center, University of Maryland School of Medicine, Baltimore, MD, USA
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3
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Voltan G, Mazzeo P, Regazzo D, Scaroni C, Ceccato F. Role of Estrogen and Estrogen Receptor in GH-Secreting Adenomas. Int J Mol Sci 2023; 24:9920. [PMID: 37373068 DOI: 10.3390/ijms24129920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Revised: 05/17/2023] [Accepted: 06/07/2023] [Indexed: 06/29/2023] Open
Abstract
Acromegaly is a rare disease with several systemic complications that may lead to increased overall morbidity and mortality. Despite several available treatments, ranging from transsphenoidal resection of GH-producing adenomas to different medical therapies, complete hormonal control is not achieved in some cases. Some decades ago, estrogens were first used to treat acromegaly, resulting in a significant decrease in IGF1 levels. However, due to the consequent side effects of the high dose utilized, this treatment was later abandoned. The evidence that estrogens are able to blunt GH activity also derives from the evidence that women with GH deficiency taking oral estro-progestins pills need higher doses of GH replacement therapy. In recent years, the role of estrogens and Selective Estrogens Receptor Modulators (SERMs) in acromegaly treatment has been re-evaluated, especially considering poor control of the disease under first- and second-line medical treatment. In this review, we analyze the state of the art concerning the impact of estrogen and SERMs on the GH/IGF1 axis, focusing on molecular pathways and the possible implications for acromegaly treatment.
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Affiliation(s)
- Giacomo Voltan
- Department of Medicine (DIMED), University of Padova, Via Giustiniani 2, 35128 Padova, Italy
- Endocrinology Unit, Padova University Hospital, Via Ospedale Civile 105, 35128 Padova, Italy
| | - Pierluigi Mazzeo
- Department of Medicine (DIMED), University of Padova, Via Giustiniani 2, 35128 Padova, Italy
- Endocrinology Unit, Padova University Hospital, Via Ospedale Civile 105, 35128 Padova, Italy
| | - Daniela Regazzo
- Department of Medicine (DIMED), University of Padova, Via Giustiniani 2, 35128 Padova, Italy
| | - Carla Scaroni
- Department of Medicine (DIMED), University of Padova, Via Giustiniani 2, 35128 Padova, Italy
- Endocrinology Unit, Padova University Hospital, Via Ospedale Civile 105, 35128 Padova, Italy
| | - Filippo Ceccato
- Department of Medicine (DIMED), University of Padova, Via Giustiniani 2, 35128 Padova, Italy
- Endocrinology Unit, Padova University Hospital, Via Ospedale Civile 105, 35128 Padova, Italy
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Olascoaga-Caso EM, Tamariz-Domínguez E, Rodríguez-Alba JC, Juárez-Aguilar E. Exogenous growth hormone promotes an epithelial-mesenchymal hybrid phenotype in cancerous HeLa cells but not in non-cancerous HEK293 cells. Mol Cell Biochem 2022; 478:1117-1128. [PMID: 36222986 DOI: 10.1007/s11010-022-04583-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 10/03/2022] [Indexed: 11/30/2022]
Abstract
In cancer, the Epithelial to Mesenchymal Transition (EMT) is the process in which epithelial cells acquire mesenchymal features that allow metastasis, and chemotherapy resistance. Growth hormone (GH) has been associated with melanoma, breast, and endometrial cancer progression through an autocrine regulation of EMT. Since exogenous and autocrine expression of GH is known to have different molecular effects, we investigated whether exogenous GH is capable of regulating the EMT of cancer cells. Furthermore, we investigated whether exogenous GH could promote EMT in non-cancerous cells. To study the effect of GH (100 ng/ml) on cancer and non-cancer cells, we used HeLa and HEK293 cell lines, respectively. We evaluated the loss of cell-cell contacts, by cell scattering assay and migration by wound-healing assay. Additionally, we evaluated the morphological changes by phalloidin-staining. Finally, we evaluated the molecular markers E-cadherin and vimentin by flow cytometry. GH enhances cell scattering and the migratory rate and promotes morphological changes such as cell area increase and actin cytoskeleton filaments formation on HeLa cell line. Moreover, we found that GH favors the expression of the mesenchymal protein vimentin, followed by an increase in E-cadherin's epithelial protein expression, characteristics of an epithelial-mesenchymal hybrid phenotype that is associated with metastasis. On HEK293cells, GH promotes morphological changes, including cell area increment and filopodia formation, but not affects scattering, migration, nor EMT markers expression. Our results suggest that exogenous GH might participate in cervical cancer progression favoring a hybrid EMT phenotype but not on non-cancerous HEK293 cells.
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Affiliation(s)
- E M Olascoaga-Caso
- PhD Health Sciences Program. Universidad Veracruzana, Xalapa, Veracruz, Mexico.,Cell Culture Laboratory, Department of Biomedicine, Instituto de Ciencias de la Salud, Universidad Veracruzana, Av. Luis Castelazo-Ayala S/N, Industrial-Animas, 91190, Xalapa, Veracruz, Mexico
| | - E Tamariz-Domínguez
- Cell Culture Laboratory, Department of Biomedicine, Instituto de Ciencias de la Salud, Universidad Veracruzana, Av. Luis Castelazo-Ayala S/N, Industrial-Animas, 91190, Xalapa, Veracruz, Mexico
| | - J C Rodríguez-Alba
- Flow Cytometry Unity, Department of Biomedicine, Instituto de Ciencias de la Salud, Universidad Veracruzana, Médicos y odontólogos s/n, Unidad del Bosque, 91010, Xalapa, Veracruz, Mexico
| | - E Juárez-Aguilar
- Cell Culture Laboratory, Department of Biomedicine, Instituto de Ciencias de la Salud, Universidad Veracruzana, Av. Luis Castelazo-Ayala S/N, Industrial-Animas, 91190, Xalapa, Veracruz, Mexico.
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5
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Second-Generation Jak2 Inhibitors for Advanced Prostate Cancer: Are We Ready for Clinical Development? Cancers (Basel) 2021; 13:cancers13205204. [PMID: 34680353 PMCID: PMC8533841 DOI: 10.3390/cancers13205204] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 10/05/2021] [Accepted: 10/11/2021] [Indexed: 12/19/2022] Open
Abstract
Simple Summary Prostate Cancer (PC) is currently estimated to affect 1 in 9 men and is the second leading cause of cancer in men in the US. While androgen deprivation therapy, which targets the androgen receptor, is one of the front-line therapies for advanced PC and for recurrence of organ-confined PC treated with surgery, lethal castrate-resistant PC develops consistently in patients. PC is a multi-focal cancer with different grade carcinoma areas presenting simultaneously. Jak2-Stat5 signaling pathway has emerged as a potentially highly effective molecular target in PCs with positive areas for activated Stat5 protein. Activated Jak2-Stat5 signaling can be readily targeted by the second-generation Jak2-inhibitors that have been developed for myeloproliferative and autoimmune disorders and hematological malignancies. In this review, we analyze and summarize the Jak2 inhibitors that are currently in preclinical and clinical development. Abstract Androgen deprivation therapy (ADT) for metastatic and high-risk prostate cancer (PC) inhibits growth pathways driven by the androgen receptor (AR). Over time, ADT leads to the emergence of lethal castrate-resistant PC (CRPC), which is consistently caused by an acquired ability of tumors to re-activate AR. This has led to the development of second-generation anti-androgens that more effectively antagonize AR, such as enzalutamide (ENZ). However, the resistance of CRPC to ENZ develops rapidly. Studies utilizing preclinical models of PC have established that inhibition of the Jak2-Stat5 signaling leads to extensive PC cell apoptosis and decreased tumor growth. In large clinical cohorts, Jak2-Stat5 activity predicts PC progression and recurrence. Recently, Jak2-Stat5 signaling was demonstrated to induce ENZ-resistant PC growth in preclinical PC models, further emphasizing the importance of Jak2-Stat5 for therapeutic targeting for advanced PC. The discovery of the Jak2V617F somatic mutation in myeloproliferative disorders triggered the rapid development of Jak1/2-specific inhibitors for a variety of myeloproliferative and auto-immune disorders as well as hematological malignancies. Here, we review Jak2 inhibitors targeting the mutated Jak2V617F vs. wild type (WT)-Jak2 that are currently in the development pipeline. Among these 35 compounds with documented Jak2 inhibitory activity, those with potency against WT-Jak2 hold strong potential for advanced PC therapy.
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Tan B, Chen X, Fan Y, Yang Y, Yang J, Tan L. STAT3 phosphorylation is required for the HepaCAM-mediated inhibition of castration-resistant prostate cancer cell viability and metastasis. Prostate 2021; 81:603-611. [PMID: 33909312 DOI: 10.1002/pros.24141] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 03/18/2021] [Accepted: 04/15/2021] [Indexed: 12/15/2022]
Abstract
BACKGROUND Castration-resistant prostate cancer (CRPC) is an advanced disease that is difficult to treat, the mechanism of it is unclear. This study illustrated the function of hepatocyte cell adhesion molecule (HepaCAM) on CRPC cell viability and metastasis. METHODS The expression of HepaCAM and p-STAT3 in CRPC tissues were determined by immunohistochemistry and western blot analysis. Cell Counting Kit-8 and colony formation assays were deployed to analyze the growth ability of CRPC cells following the adenovirus-mediated re-expression of HepaCAM. CRPC cell migration and invasion capacity were investigated by wound healing and Matrigel-coated transwell assays, respectively. The messenger RNA or protein levels of p-STAT3, CyclinD1, cMyc, MMP2, MMP9, and VEGF were determined by reverse transcription (RT) followed by quantitative real-time polymerase chain reaction (RT-qPCR), and western blot analysis after either HepaCAM re-expression alone or in combination with IL-22 treatment. A CRPC orthotopic xenograft mouse model was applied to investigate the functional effect of HepaCAM on the metastasis of CRPC cells to the lungs. RESULTS The expression levels of HepaCAM were decreased while those of p-STAT3 were elevated in CRPC cells compare with surrounding benign tissues (p < .001). The overexpression of HepaCAM in CRPC cells notably reduced proliferation, migration, and invasion by inhibiting the expression of p-STAT3, CyclinD1, cMyc, MMP2, MMP9, and VEGF (p < .05). In addition, the expression of HepaCAM significantly inhibited the IL-22/p-STAT3 axis and the metastasis of CRPC cells to the lungs. CONCLUSIONS Our data suggested that HepaCAM suppressed the viability of CRPC cells via the IL-22/p-STAT3 axis and inhibited the metastasis of CRPC cells from the prostate to the lungs (p < .05).
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Affiliation(s)
- Bing Tan
- School of Clinical Medicine, Chongqing Medical and Pharmaceutical College, Chongqing, China
- Chongqing Engineering Research Center of Pharmaceutical Sciences, Chongqing, China
- Department of Urology, Chenjiaqiao Hospital/The Affiliated Hospital of Chongqing Medical and Pharmaceutical College, Chongqing, China
| | - Xiaoming Chen
- Department of Pathology, Chenjiaqiao Hospital/The Affiliated Hospital of Chongqing Medical and Pharmaceutical College, Chongqing, China
| | - Yanru Fan
- The Key Laboratory of Diagnostics Medicine Designated by the National Ministry of Education, Chongqing Medical University, Chongqing, China
| | - Yuanjuan Yang
- School of Clinical Medicine, Chongqing Medical and Pharmaceutical College, Chongqing, China
- Chongqing Engineering Research Center of Pharmaceutical Sciences, Chongqing, China
| | - Junjie Yang
- Department of Urology, Chenjiaqiao Hospital/The Affiliated Hospital of Chongqing Medical and Pharmaceutical College, Chongqing, China
| | - Li Tan
- School of Clinical Medicine, Chongqing Medical and Pharmaceutical College, Chongqing, China
- Chongqing Engineering Research Center of Pharmaceutical Sciences, Chongqing, China
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Yan H, Wang H, Yin Y, Zou J, Xiao F, Yi L, He Y, He B. GHR is involved in gastric cell growth and apoptosis via PI3K/AKT signalling. J Cell Mol Med 2021; 25:2450-2458. [PMID: 33492754 PMCID: PMC7933969 DOI: 10.1111/jcmm.16160] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 11/05/2020] [Accepted: 11/20/2020] [Indexed: 02/06/2023] Open
Abstract
Growth hormone receptor (GHR), the cognate receptor of growth hormone (GH), is a membrane bound receptor that belongs to the class I cytokine receptor superfamily. GH binding GHR induces cell differentiation and maturation, initiates the anabolism inside the cells and promotes cell proliferation. Recently, GHR has been reported to be associated with various types of cancer. However, the underlying mechanism of GHR in gastric cancer has not been defined. Our results showed that silence of GHR inhibited the growth of SGC-7901 and MGC-803 cells, and tumour development in mouse xenograft model. Flow cytometry showed that GHR knockout significantly stimulated gastric cancer cell apoptosis and caused G1 cell cycle arrest, which was also verified by Western blot that GHR deficiency induced the protein level of cleaved-PARP, a valuable marker of apoptosis. In addition, GHR deficiency inhibited the activation of PI3K/AKT signalling pathway. On the basis of the results, that GHR regulates gastric cancer cell growth and apoptosis through controlling G1 cell cycle progression via mediating PI3K/AKT signalling pathway. These findings provide a novel understanding for the role of GHR in gastric cancer.
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Affiliation(s)
- Hong‐Zhu Yan
- Department of PathologySeventh People's Hospital of Shanghai University of TCMShanghaiChina
| | - Hua‐Feng Wang
- Department of PathologyRuijin Hospital, Shanghai Jiao Tong University School of MedicineShanghaiChina
| | - Yueling Yin
- Department of PathologyHaiyang People's HospitalHaiyangChina
| | - Jue Zou
- Department of PathologySeventh People's Hospital of Shanghai University of TCMShanghaiChina
| | - Feng Xiao
- Department of PathologySeventh People's Hospital of Shanghai University of TCMShanghaiChina
| | - Li‐Na Yi
- Department of PathologySeventh People's Hospital of Shanghai University of TCMShanghaiChina
| | - Ying He
- Department of UltrasoundThe Tumor Hospital of Nantong UniversityNantongChina
| | - Bo‐Sheng He
- Department of RadiologyAffiliated Hospital 2 of Nantong UniversityNantongChina
- Clinical Medicine Research CenterAffiliated Hospital 2 of Nantong UniversityNantongChina
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8
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Cheng M, Huang W, Cai W, Fang M, Chen Y, Wang C, Yan W. Growth hormone receptor promotes osteosarcoma cell growth and metastases. FEBS Open Bio 2019; 10:127-134. [PMID: 31725956 PMCID: PMC6943229 DOI: 10.1002/2211-5463.12761] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Revised: 10/18/2019] [Accepted: 11/12/2019] [Indexed: 12/18/2022] Open
Abstract
Osteosarcoma (OS) is the primary bone malignancy in children and adolescents, with a high incidence of lung metastasis and poor prognosis. Here, we report that growth hormone receptor (GHR) is overexpressed in OS samples compared with osteofibrous dysplasia. We subsequently demonstrated that GHR knockdown inhibited colony formation, promoted cell apoptosis and decreased the number of cells at G2/M phase in 143B and U2OS cells. Furthermore, knockdown of GHR inhibited tumor growth in vivo. Together, these findings indicate that GHR modulates cell proliferation and metastasis through the phosphoinositide 3‐kinase/AKT signaling pathway and may be suitable for use as a putative biomarker of OS.
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Affiliation(s)
- Mo Cheng
- Department of Musculoskeletal Surgery, Fudan University Shanghai Cancer Center, China
| | - Wending Huang
- Department of Musculoskeletal Surgery, Fudan University Shanghai Cancer Center, China
| | - Weiluo Cai
- Department of Musculoskeletal Surgery, Fudan University Shanghai Cancer Center, China
| | - Meng Fang
- Department of Musculoskeletal Surgery, Fudan University Shanghai Cancer Center, China
| | - Yong Chen
- Department of Musculoskeletal Surgery, Fudan University Shanghai Cancer Center, China
| | - Chunmeng Wang
- Department of Musculoskeletal Surgery, Fudan University Shanghai Cancer Center, China
| | - Wangjun Yan
- Department of Musculoskeletal Surgery, Fudan University Shanghai Cancer Center, China
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Boguszewski CL, Boguszewski MCDS. Growth Hormone's Links to Cancer. Endocr Rev 2019; 40:558-574. [PMID: 30500870 DOI: 10.1210/er.2018-00166] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Accepted: 10/23/2018] [Indexed: 12/13/2022]
Abstract
Several components of the GH axis are involved in tumor progression, and GH-induced intracellular signaling has been strongly associated with breast cancer susceptibility in genome-wide association studies. In the general population, high IGF-I levels and low IGF-binding protein-3 levels within the normal range are associated with the development of common malignancies, and components of the GH-IGF signaling system exhibit correlations with clinical, histopathological, and therapeutic parameters in cancer patients. Despite promising findings in preclinical studies, anticancer therapies targeting the GH-IGF signaling system have led to disappointing results in clinical trials. There is substantial evidence for some degree of protection against tumor development in several animal models and in patients with genetic defects associated with GH deficiency or resistance. In contrast, the link between GH excess and cancer risk in acromegaly patients is much less clear, and cancer screening in acromegaly has been a highly controversial issue. Recent studies have shown that increased life expectancy in acromegaly patients who attain normal GH and IGF-I levels is associated with more deaths due to age-related cancers. Replacement GH therapy in GH deficiency hypopituitary adults and short children has been shown to be safe when no other risk factors for malignancy are present. Nevertheless, the use of GH in cancer survivors and in short children with RASopathies, chromosomal breakage syndromes, or DNA-repair disorders should be carefully evaluated owing to an increased risk of recurrence, primary cancer, or second neoplasia in these individuals.
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Affiliation(s)
- Cesar Luiz Boguszewski
- Department of Internal Medicine, Endocrine Division (SEMPR), University Hospital, Federal University of Parana, Curitiba, Brazil
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Recouvreux MV, Wu JB, Gao AC, Zonis S, Chesnokova V, Bhowmick N, Chung LW, Melmed S. Androgen Receptor Regulation of Local Growth Hormone in Prostate Cancer Cells. Endocrinology 2017; 158:2255-2268. [PMID: 28444169 PMCID: PMC5505214 DOI: 10.1210/en.2016-1939] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Accepted: 04/18/2017] [Indexed: 01/22/2023]
Abstract
Prostate cancer (PCa) growth is mainly driven by androgen receptor (AR), and tumors that initially respond to androgen deprivation therapy (ADT) or AR inhibition usually relapse into a more aggressive, castration-resistant PCa (CRPC) stage. Circulating growth hormone (GH) has a permissive role in PCa development in animal models and in human PCa xenograft growth. As GH and GH receptor (GHR) are both expressed in PCa cells, we assessed whether prostatic GH production is linked to AR activity and whether GH contributes to the castration-resistant phenotype. Using online datasets, we found that GH is highly expressed in human CRPC. We observed increased GH expression in castration-resistant C4-2 compared with castration-sensitive LNCaP cells as well as in enzalutamide (MDV3100)-resistant (MDVR) C4-2B (C4-2B MDVR) cells compared with parental C4-2B. We describe a negative regulation of locally produced GH by androgens/AR in PCa cells following treatment with AR agonists (R1881) and antagonists (enzalutamide, bicalutamide). We also show that GH enhances invasive behavior of CRPC 22Rv1 cells, as reflected by increased migration, invasion, and anchorage-independent growth, as well as expression of matrix metalloproteases. Moreover, GH induces expression of the AR splice variant 7, which correlates with antiandrogen resistance, and also induces insulinlike growth factor 1, which is implicated in PCa progression and ligand-independent AR activation. In contrast, blockade of GH action with the GHR antagonist pegvisomant reverses these effects both in vitro and in vivo. GH induction following ADT or AR inhibition may contribute to CRPC progression by bypassing androgen growth requirements.
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Affiliation(s)
| | - J. Boyang Wu
- Uro-Oncology Research Program, Department of Medicine, Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, Los Angeles, California, 90048
- Department of Pharmaceutical Sciences, College of Pharmacy, Washington State University, Spokane, Washington, 99202
| | - Allen C. Gao
- Department of Urology, University of California at Davis, Sacramento, California, 95817
| | - Svetlana Zonis
- Pituitary Center, Cedars Sinai Medical Center, Los Angeles, California, 90048
| | - Vera Chesnokova
- Pituitary Center, Cedars Sinai Medical Center, Los Angeles, California, 90048
| | - Neil Bhowmick
- Uro-Oncology Research Program, Department of Medicine, Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, Los Angeles, California, 90048
| | - Leland W. Chung
- Uro-Oncology Research Program, Department of Medicine, Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, Los Angeles, California, 90048
| | - Shlomo Melmed
- Pituitary Center, Cedars Sinai Medical Center, Los Angeles, California, 90048
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Abstract
Preclinical studies in the 1980s defined a role for IGF signaling in the development and sustainability of the malignant process. Subsequently, antibody, tyrosine kinase, and ligand inhibitors of the IGF receptor were manufactured. In the past decade, numerous clinical trials have tested the efficacy of IGF receptor inhibitors in the treatment of advanced tumors. Early-phase trials in heavily pretreated populations showed promise with complete or partial responses in a few patients and stable disease in many more. Unfortunately, the results of the early-phase trials did not pan out to later-phase trials. The lack of use of biomarkers to define subsets of patients that may benefit from IGF receptor blockade and compensatory signaling via other growth factor receptors such as the insulin, GH, and epidermal growth factor receptors may have played a role in the lack of efficacy of IGF receptor inhibition in phase III trials. Although these trials failed to show benefit, the trials have revealed previously unknown knowledge regarding the complex nature of IGF signaling. The knowledge obtained from these trials will be useful in designing future trials studying inhibitors of growth factor signaling.
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Affiliation(s)
- Heather Beckwith
- Departments of Medicine (H.B., D.Y.) and Pharmacology (D.Y.) and Masonic Cancer Center (D.Y.), University of Minnesota, Minneapolis, Minnesota 55455
| | - Douglas Yee
- Departments of Medicine (H.B., D.Y.) and Pharmacology (D.Y.) and Masonic Cancer Center (D.Y.), University of Minnesota, Minneapolis, Minnesota 55455
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