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Gaumond SI, Abdin R, Costoya J, Schally AV, Jimenez JJ. Exploring the role of GHRH antagonist MIA-602 in overcoming Doxorubicin-resistance in acute myeloid leukemia. Oncotarget 2024; 15:248-254. [PMID: 38588464 PMCID: PMC11001269 DOI: 10.18632/oncotarget.28579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/10/2024] Open
Abstract
Acute myeloid leukemia (AML) is characterized by the rapid proliferation of mutagenic hematopoietic progenitors in the bone marrow. Conventional therapies include chemotherapy and bone marrow stem cell transplantation; however, they are often associated with poor prognosis. Notably, growth hormone-releasing hormone (GHRH) receptor antagonist MIA-602 has been shown to impede the growth of various human cancer cell lines, including AML. This investigation examined the impact of MIA-602 as monotherapy and in combination with Doxorubicin on three Doxorubicin-resistant AML cell lines, KG-1A, U-937, and K-562. The in vitro results revealed a significant reduction in cell viability for all treated wild-type cells. Doxorubicin-resistant clones were similarly susceptible to MIA-602 as the wild-type counterpart. Our in vivo experiment of xenografted nude mice with Doxorubicin-resistant K-562 revealed a reduction in tumor volume with MIA-602 treatment compared to control. Our study demonstrates that these three AML cell lines, and their Doxorubicin-resistant clones, are susceptible to GHRH antagonist MIA-602.
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Affiliation(s)
- Simonetta I Gaumond
- Dr. Philip Frost Department of Dermatology and Cutaneous Surgery, Miller School of Medicine, University of Miami, Miami, FL 33136, USA
| | - Rama Abdin
- Charles E. Schmidt College of Medicine, Florida Atlantic University, Boca Raton, FL 33431, USA
| | - Joel Costoya
- Dr. Philip Frost Department of Dermatology and Cutaneous Surgery, Miller School of Medicine, University of Miami, Miami, FL 33136, USA
| | | | - Joaquin J Jimenez
- Dr. Philip Frost Department of Dermatology and Cutaneous Surgery, Miller School of Medicine, University of Miami, Miami, FL 33136, USA
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2
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Condor Capcha JM, Kamiar A, Robleto E, Saad AG, Cui T, Wong A, Villano J, Zhong W, Pekosz A, Medina E, Cai R, Sha W, Ranek MJ, Webster KA, Schally AV, Jackson RM, Shehadeh LA. Growth hormone-releasing hormone receptor antagonist MIA-602 attenuates cardiopulmonary injury induced by BSL-2 rVSV-SARS-CoV-2 in hACE2 mice. Proc Natl Acad Sci U S A 2023; 120:e2308342120. [PMID: 37983492 PMCID: PMC10691341 DOI: 10.1073/pnas.2308342120] [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: 05/25/2023] [Accepted: 09/07/2023] [Indexed: 11/22/2023] Open
Abstract
COVID-19 pneumonia causes acute lung injury and acute respiratory distress syndrome (ALI/ARDS) characterized by early pulmonary endothelial and epithelial injuries with altered pulmonary diffusing capacity and obstructive or restrictive physiology. Growth hormone-releasing hormone receptor (GHRH-R) is expressed in the lung and heart. GHRH-R antagonist, MIA-602, has been reported to modulate immune responses to bleomycin lung injury and inflammation in granulomatous sarcoidosis. We hypothesized that MIA-602 would attenuate rVSV-SARS-CoV-2-induced pulmonary dysfunction and heart injury in a BSL-2 mouse model. Male and female K18-hACE2tg mice were inoculated with SARS-CoV-2/USA-WA1/2020, BSL-2-compliant recombinant VSV-eGFP-SARS-CoV-2-Spike (rVSV-SARS-CoV-2), or PBS, and lung viral load, weight loss, histopathology, and gene expression were compared. K18-hACE2tg mice infected with rVSV-SARS-CoV-2 were treated daily with subcutaneous MIA-602 or vehicle and conscious, unrestrained plethysmography performed on days 0, 3, and 5 (n = 7 to 8). Five days after infection mice were killed, and blood and tissues collected for histopathology and protein/gene expression. Both native SARS-CoV-2 and rVSV-SARS-CoV-2 presented similar patterns of weight loss, infectivity (~60%), and histopathologic changes. Daily treatment with MIA-602 conferred weight recovery, reduced lung perivascular inflammation/pneumonia, and decreased lung/heart ICAM-1 expression compared to vehicle. MIA-602 rescued altered respiratory rate, increased expiratory parameters (Te, PEF, EEP), and normalized airflow parameters (Penh and Rpef) compared to vehicle, consistent with decreased airway inflammation. RNASeq followed by protein analysis revealed heightened levels of inflammation and end-stage necroptosis markers, including ZBP1 and pMLKL induced by rVSV-SARS-CoV-2, that were normalized by MIA-602 treatment, consistent with an anti-inflammatory and pro-survival mechanism of action in this preclinical model of COVID-19 pneumonia.
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Affiliation(s)
- Jose M. Condor Capcha
- Department of Medicine, Division of Cardiology, University of Miami Leonard M. Miller School of Medicine, Miami, FL33136
- Interdisciplinary Stem Cell Institute, University of Miami Leonard M. Miller School of Medicine, Miami, FL33136
| | - Ali Kamiar
- Department of Medicine, Division of Cardiology, University of Miami Leonard M. Miller School of Medicine, Miami, FL33136
- Interdisciplinary Stem Cell Institute, University of Miami Leonard M. Miller School of Medicine, Miami, FL33136
| | - Emely Robleto
- Department of Medicine, Division of Cardiology, University of Miami Leonard M. Miller School of Medicine, Miami, FL33136
- Interdisciplinary Stem Cell Institute, University of Miami Leonard M. Miller School of Medicine, Miami, FL33136
| | - Ali G. Saad
- Department of Pathology, University of Miami Leonard M. Miller School of Medicine, Miami, FL33136
| | - Tengjiao Cui
- Research Service, Miami Veterans Affairs Health System (VAHS), Miami, FL33125
- Department of Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, University of Miami Miller School of Medicine, Miami, FL33101
| | - Amanda Wong
- Department of Molecular and Comparative Pathobiology, Johns Hopkins University, Baltimore, MD21205
| | - Jason Villano
- Department of Molecular and Comparative Pathobiology, Johns Hopkins University, Baltimore, MD21205
| | - William Zhong
- W. Harry Feinstone Department of Molecular Microbiology and Immunology, Johns Hopkins University, Baltimore, MD21205
| | - Andrew Pekosz
- W. Harry Feinstone Department of Molecular Microbiology and Immunology, Johns Hopkins University, Baltimore, MD21205
| | - Edgar Medina
- Qualityminds Gesellschaft mit beschränkter Haftung (GmbH), Munchen, Munich81549, Germany
| | - Renzhi Cai
- Interdisciplinary Stem Cell Institute, University of Miami Leonard M. Miller School of Medicine, Miami, FL33136
- Research Service, Miami Veterans Affairs Health System (VAHS), Miami, FL33125
- Department of Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, University of Miami Miller School of Medicine, Miami, FL33101
| | - Wei Sha
- Research Service, Miami Veterans Affairs Health System (VAHS), Miami, FL33125
- Department of Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, University of Miami Miller School of Medicine, Miami, FL33101
| | - Mark J. Ranek
- Division of Cardiology, Department of Medicine, Johns Hopkins University, Baltimore, MD21205
- Department of Pharmacology and Molecular Sciences, Johns Hopkins University, Baltimore, MD21205
| | - Keith A. Webster
- Integene International Holdings, Miami, FL33179
- Baylor College of Medicine, Houston, TX77030
| | - Andrew V. Schally
- Interdisciplinary Stem Cell Institute, University of Miami Leonard M. Miller School of Medicine, Miami, FL33136
- Research Service, Miami Veterans Affairs Health System (VAHS), Miami, FL33125
- Department of Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, University of Miami Miller School of Medicine, Miami, FL33101
| | - Robert M. Jackson
- Research Service, Miami Veterans Affairs Health System (VAHS), Miami, FL33125
- Department of Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, University of Miami Miller School of Medicine, Miami, FL33101
| | - Lina A. Shehadeh
- Department of Medicine, Division of Cardiology, University of Miami Leonard M. Miller School of Medicine, Miami, FL33136
- Interdisciplinary Stem Cell Institute, University of Miami Leonard M. Miller School of Medicine, Miami, FL33136
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3
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Cai R, Zhang X, Wang H, Cui T, Halmos G, Sha W, He J, Popovics P, Vidaurre I, Zhang C, Mirsaeidi M, Schally AV. Synthesis of potent antagonists of receptors for growth hormone-releasing hormone with antitumor and anti-inflammatory activity. Peptides 2022; 150:170716. [PMID: 34952135 DOI: 10.1016/j.peptides.2021.170716] [Citation(s) in RCA: 2] [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: 09/24/2021] [Revised: 12/16/2021] [Accepted: 12/17/2021] [Indexed: 12/14/2022]
Abstract
The syntheses and biological evaluation of GHRH antagonists of AVR series with high anticancer and anti-inflammatory activities are described. Compared to our previously reported GHRH antagonist 602 of MIAMI series, AVR analogs contain additional modifications at positions 0, 6, 8, 10, 11, 12, 20, 21, 29 and 30, which induce greater antitumor activities. Five of nineteen tested AVR analogs presented binding affinities to the membrane GHRH receptors on human pituitary, 2-4-fold better than MIA-602. The antineoplastic properties of these analogs were evaluated in vitro using proliferation assays and in vivo in nude mice xenografted with various human cancer cell lines including lung (NSCLC-ADC HCC827 and NSCLC H460), gastric (NCI-N87), pancreatic (PANC-1 and CFPAC-1), colorectal (HT-29), breast (MX-1), glioblastoma (U87), ovarian (SK-OV-3 and OVCAR-3) and prostatic (PC3) cancers. In vitro AVR analogs showed inhibition of cell viability equal to or greater than MIA-602. After subcutaneous administration at 5 μg/day doses, some AVR antagonists demonstrated better inhibition of tumor growth in nude mice bearing various human cancers, with analog AVR-353 inducing stronger suppression than MIA-602 in lung, gastric, pancreatic and colorectal cancers and AVR-352 in ovarian cancers and glioblastoma. Both antagonists induced greater inhibition of GH release than MIA-602 in vitro in cultured rat pituitary cells and in vivo in rats. AVR-352 also demonstrated stronger anti-inflammatory effects in lung granulomas from mice with lung inflammation. Our studies demonstrate the merit of further investigation of AVR GHRH antagonists and support their potential use for clinical therapy of human cancers and other diseases.
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Affiliation(s)
- Renzhi Cai
- Endocrine, Polypeptide, and Cancer Institute, Veterans Affairs Medical Center Miami, FL 33125, United States; South Florida VA Foundation for Research and Education, Veterans Affairs Medical Center Miami, FL 33125, United States
| | - Xianyang Zhang
- Endocrine, Polypeptide, and Cancer Institute, Veterans Affairs Medical Center Miami, FL 33125, United States; Interdisciplinary Stem Cell Institute, Miller School of Medicine, University of Miami, Miami, FL 33136, United States
| | - Haibo Wang
- Endocrine, Polypeptide, and Cancer Institute, Veterans Affairs Medical Center Miami, FL 33125, United States; Interdisciplinary Stem Cell Institute, Miller School of Medicine, University of Miami, Miami, FL 33136, United States
| | - Tengjiao Cui
- Endocrine, Polypeptide, and Cancer Institute, Veterans Affairs Medical Center Miami, FL 33125, United States; South Florida VA Foundation for Research and Education, Veterans Affairs Medical Center Miami, FL 33125, United States; Department of Medicine, Divisions of Medical/Oncology and Endocrinology, and the Department of Pathology, Miller School of Medicine, University of Miami, Miami, FL 33136, United States
| | - Gabor Halmos
- Department of Biopharmacy, School of Pharmacy, University of Debrecen, Hungary
| | - Wei Sha
- Endocrine, Polypeptide, and Cancer Institute, Veterans Affairs Medical Center Miami, FL 33125, United States; Interdisciplinary Stem Cell Institute, Miller School of Medicine, University of Miami, Miami, FL 33136, United States
| | - Jinlin He
- Endocrine, Polypeptide, and Cancer Institute, Veterans Affairs Medical Center Miami, FL 33125, United States; South Florida VA Foundation for Research and Education, Veterans Affairs Medical Center Miami, FL 33125, United States
| | - Petra Popovics
- Endocrine, Polypeptide, and Cancer Institute, Veterans Affairs Medical Center Miami, FL 33125, United States
| | - Irving Vidaurre
- Endocrine, Polypeptide, and Cancer Institute, Veterans Affairs Medical Center Miami, FL 33125, United States; South Florida VA Foundation for Research and Education, Veterans Affairs Medical Center Miami, FL 33125, United States
| | - Chongxu Zhang
- Section of Pulmonary Veterans Affairs Medical Center Miami, FL 33125, United States
| | - Mehdi Mirsaeidi
- Section of Pulmonary Veterans Affairs Medical Center Miami, FL 33125, United States; Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Miller School of Medicine, University of Miami, Miami, FL 33136, United States; Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, FL 33136, United States
| | - Andrew V Schally
- Endocrine, Polypeptide, and Cancer Institute, Veterans Affairs Medical Center Miami, FL 33125, United States; South Florida VA Foundation for Research and Education, Veterans Affairs Medical Center Miami, FL 33125, United States; Department of Medicine, Divisions of Medical/Oncology and Endocrinology, and the Department of Pathology, Miller School of Medicine, University of Miami, Miami, FL 33136, United States; Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, FL 33136, United States.
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4
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Recinella L, Chiavaroli A, Veschi S, Di Valerio V, Lattanzio R, Orlando G, Ferrante C, Gesmundo I, Granata R, Cai R, Sha W, Schally AV, Brunetti L, Leone S. Antagonist of growth hormone-releasing hormone MIA-690 attenuates the progression and inhibits growth of colorectal cancer in mice. Biomed Pharmacother 2022; 146:112554. [PMID: 34923341 DOI: 10.1016/j.biopha.2021.112554] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 12/09/2021] [Accepted: 12/13/2021] [Indexed: 12/23/2022] Open
Abstract
Colorectal cancer (CRC) is an aggressive tumor in which new treatment options deliver negative results on cure rates and long-term survival. The anticancer effects of growth hormone-releasing hormone (GHRH) antagonists have been reported in various experimental tumors, but their activity in CRC is unknown. In the present study, we demonstrated that chronic treatment with GHRH antagonist of MIAMI class, MIA-690, promoted survival and gradually blunted tumor progression in experimentally induced colitis-associated cancer in mice, paralleled by reduced inflammation in colon tissue. In particular, MIA-690 improved disease activity index score, and reduced loss of weight and mortality, by improving the survival rates, compared with vehicle-treated group. MIA-690 was also found to reduce various inflammatory and oxidative markers, such as serotonin, prostaglandin (PG)E2 and 8-iso-PGF2α levels, as well as COX-2, iNOS, TNF-α, IL-6 and NF-kB gene expression. Moreover, MIA-690 inhibited the protein expression of c-Myc, P-AKT and Bcl-2 and upregulated p53 protein expression. In conclusion, we showed that MIA-690 suppresses CRC progression and growth by reducing inflammatory and oxidative markers and modulating apoptotic and oncogenic pathways. Further investigations are required for translating these findings into the clinics.
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Affiliation(s)
- Lucia Recinella
- Department of Pharmacy, G. d'Annunzio University of Chieti-Pescara, 66013 Chieti, Italy.
| | - Annalisa Chiavaroli
- Department of Pharmacy, G. d'Annunzio University of Chieti-Pescara, 66013 Chieti, Italy.
| | - Serena Veschi
- Department of Pharmacy, G. d'Annunzio University of Chieti-Pescara, 66013 Chieti, Italy.
| | - Valentina Di Valerio
- Department of Medicine and Ageing Sciences, G. d'Annunzio University of Chieti-Pescara, 66013 Chieti, Italy.
| | - Rossano Lattanzio
- Department of Medical, Oral and Biotechnological Sciences, G. d'Annunzio University of Chieti-Pescara, 66013 Chieti, Italy; Center for Advanced Studies and Technology (CAST), G. d'Annunzio University of Chieti-Pescara, 66013 Chieti, Italy.
| | - Giustino Orlando
- Department of Pharmacy, G. d'Annunzio University of Chieti-Pescara, 66013 Chieti, Italy.
| | - Claudio Ferrante
- Department of Pharmacy, G. d'Annunzio University of Chieti-Pescara, 66013 Chieti, Italy.
| | - Iacopo Gesmundo
- Division of Endocrinology, Diabetes and Metabolism, Department of Medical Sciences, University of Turin, 10126 Turin, Italy.
| | - Riccarda Granata
- Division of Endocrinology, Diabetes and Metabolism, Department of Medical Sciences, University of Turin, 10126 Turin, Italy.
| | - Renzhi Cai
- Veterans Affairs Medical Center, Miami, FL 33125, USA; Division of Endocrinology, Diabetes and Metabolism, and Division of Medical Oncology, Department of Medicine, and Department of Pathology, Miller School of Medicine, University of Miami, and Sylvester Comprehensive Cancer Center, Miami, FL 33136, USA.
| | - Wei Sha
- Veterans Affairs Medical Center, Miami, FL 33125, USA; Division of Endocrinology, Diabetes and Metabolism, and Division of Medical Oncology, Department of Medicine, and Department of Pathology, Miller School of Medicine, University of Miami, and Sylvester Comprehensive Cancer Center, Miami, FL 33136, USA.
| | - Andrew V Schally
- Veterans Affairs Medical Center, Miami, FL 33125, USA; Division of Endocrinology, Diabetes and Metabolism, and Division of Medical Oncology, Department of Medicine, and Department of Pathology, Miller School of Medicine, University of Miami, and Sylvester Comprehensive Cancer Center, Miami, FL 33136, USA.
| | - Luigi Brunetti
- Department of Pharmacy, G. d'Annunzio University of Chieti-Pescara, 66013 Chieti, Italy.
| | - Sheila Leone
- Department of Pharmacy, G. d'Annunzio University of Chieti-Pescara, 66013 Chieti, Italy.
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5
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Zheng Y, Karnoub AE. Endocrine regulation of cancer stem cell compartments in breast tumors. Mol Cell Endocrinol 2021; 535:111374. [PMID: 34242715 DOI: 10.1016/j.mce.2021.111374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 05/28/2021] [Accepted: 06/01/2021] [Indexed: 10/20/2022]
Abstract
Cancer cells within breast tumors exist within a hierarchy in which only a small and rare subset of cells is able to regenerate growths with the heterogeneity of the original tumor. These highly malignant cancer cells, which behave like stem cells for new cancers and are called "cancer stem cells" or CSCs, have also been shown to possess increased resistance to therapeutics, and represent the root cause underlying therapy failures, persistence of residual disease, and relapse. As >90% of cancer deaths are due to refractory tumors, identification of critical molecular drivers of the CSC-state would reveal vulnerabilities that can be leveraged in designing therapeutics that eradicate advanced disease and improve patient survival outcomes. An expanding and complex body of work has now described the exquisite susceptibility of CSC pools to the regulatory influences of local and systemic hormones. Indeed, breast CSCs express a plethora of hormonal receptors, which funnel hormonal influences over every aspect of breast neoplasia - be it tumor onset, growth, survival, invasion, metastasis, or therapy resistance - via directly impacting CSC behavior. This article is intended to shed light on this active area of investigation by attempting to provide a systematic and comprehensive overview of the available evidence directly linking hormones to breast CSC biology.
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Affiliation(s)
- Yurong Zheng
- Department of Pathology and Cancer Center, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, 02215, USA
| | - Antoine E Karnoub
- Department of Pathology and Cancer Center, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, 02215, USA; Harvard Stem Cell Institute, Cambridge, MA, 02138, USA; Broad Institute of MIT and Harvard, Cambridge, MA, 02142, USA.
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6
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El-Sherbiny M, El-Shafey M, El-Din El-Agawy MS, Mohamed AS, Eisa NH, Elsherbiny NM. Diacerein ameliorates testosterone-induced benign prostatic hyperplasia in rats: Effect on oxidative stress, inflammation and apoptosis. Int Immunopharmacol 2021; 100:108082. [PMID: 34450401 DOI: 10.1016/j.intimp.2021.108082] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/15/2021] [Accepted: 08/16/2021] [Indexed: 12/20/2022]
Abstract
Benign prostatic hypertrophy (BPH) is a serious medical condition among elderly male population. BPH pathogenesis has been linked to inflammation, cellular proliferation, oxidative stress and apoptosis. Diacerein (DIA) is a FDA approved anthraquinone drug that is used to treat joint diseases such as osteoarthritis. DIA has been studied for its potent anti-inflammatory and antioxidant effects, yet its role in managing BPH has not been investigated. In this study, DIA administration for two weeks at 50 mg/kg in testosterone-induced BPH rats significantly reduced prostate weight and index. Moreover, prostatic biochemical and structural features in BPH rats were significantly improved upon DIA treatment. Mechanistically, DIA treatment associated prostatic anti-hyperplastic effects were linked to downregulation of Nrf-2/HO-1 axis, downregulation of inflammatory TNF-a, IL-1β, IL-6, downregulation of the cell proliferative marker PCNA and upregulation of caspase-3 levels. In addition, DIA treatment upregulated prostatic antioxidant GSH, the enzymatic SOD and CAT activities and reduced prostatic lipid peroxidation levels. Altogether, the present study provides evidence that DIA treatment might limit BPH progression via its potent anti-oxidant, anti-inflammatory, anti-proliferative and apoptosis inducing effects.
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Affiliation(s)
- Mohamed El-Sherbiny
- Department of Basic Medical Sciences, College of Medicine, AlMaarefa University, Riyadh, Saudi Arabia; Department of Anatomy and Embryology, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Mohamed El-Shafey
- Department of Anatomy and Embryology, Faculty of Medicine, Mansoura University, Mansoura, Egypt; Physiological Sciences Department, Fakeeh College for Medical Sciences, Jeddah, Saudi Arabia
| | | | - Abdelaty Shawky Mohamed
- Department of Basic Medical Sciences, College of Medicine, AlMaarefa University, Riyadh, Saudi Arabia; Pathology Department, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Nada H Eisa
- Biochemistry Department, Faculty of Pharmacy, Mansoura University, 35516 Mansoura, Egypt
| | - Nehal M Elsherbiny
- Biochemistry Department, Faculty of Pharmacy, Mansoura University, 35516 Mansoura, Egypt; Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Tabuk, Tabuk, Saudi Arabia.
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Gesmundo I, Granato G, Fuentes-Fayos AC, Alvarez CV, Dieguez C, Zatelli MC, Congiusta N, Banfi D, Prencipe N, Leone S, Brunetti L, Castaño JP, Luque RM, Cai R, Sha W, Ghigo E, Schally AV, Granata R. Antagonists of Growth Hormone-Releasing Hormone Inhibit the Growth of Pituitary Adenoma Cells by Hampering Oncogenic Pathways and Promoting Apoptotic Signaling. Cancers (Basel) 2021; 13:cancers13163950. [PMID: 34439107 PMCID: PMC8393969 DOI: 10.3390/cancers13163950] [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: 06/16/2021] [Revised: 07/26/2021] [Accepted: 08/03/2021] [Indexed: 12/12/2022] Open
Abstract
Simple Summary Many studies have demonstrated that the antagonists of growth hormone-releasing hormone (GHRH) exert inhibitory activities in a variety of experimental cancers; however, their potential antitumor role in pituitary adenomas (PAs) remains largely unknown. Here, we show that GHRH antagonists of Miami (MIA) class, MIA-602 and MIA-690, are able to reduce the growth and promote cell death in hormone-secreting PA cell lines, through the inhibition of mechanisms implicated in tumorigenesis and cancer progression. MIA-602 and MIA-690 also decreased the viability of tumor cells derived from human pituitary tumors. Overall, these findings suggest that GHRH antagonists may represent new therapeutic tools for the treatment of PAs, both alone or in combination with standard pharmacological treatments. Abstract Pituitary adenomas (PAs) are intracranial tumors, often associated with excessive hormonal secretion and severe comorbidities. Some patients are resistant to medical therapies; therefore, novel treatment options are needed. Antagonists of growth hormone-releasing hormone (GHRH) exert potent anticancer effects, and early GHRH antagonists were found to inhibit GHRH-induced secretion of pituitary GH in vitro and in vivo. However, the antitumor role of GHRH antagonists in PAs is largely unknown. Here, we show that the GHRH antagonists of MIAMI class, MIA-602 and MIA-690, inhibited cell viability and growth and promoted apoptosis in GH/prolactin-secreting GH3 PA cells transfected with human GHRH receptor (GH3-GHRHR), and in adrenocorticotropic hormone ACTH-secreting AtT20 PA cells. GHRH antagonists also reduced the expression of proteins involved in tumorigenesis and cancer progression, upregulated proapoptotic molecules, and lowered GHRH receptor levels. The combination of MIA-690 with temozolomide synergistically blunted the viability of GH3-GHRHR and AtT20 cells. Moreover, MIA-690 reduced both basal and GHRH-induced secretion of GH and intracellular cAMP levels. Finally, GHRH antagonists inhibited cell viability in human primary GH- and ACTH-PA cell cultures. Overall, our results suggest that GHRH antagonists, either alone or in combination with pharmacological treatments, may be considered for further development as therapy for PAs.
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Affiliation(s)
- Iacopo Gesmundo
- Division of Endocrinology, Diabetes and Metabolism, Department of Medical Science, University of Turin, 10126 Turin, Italy; (I.G.); (G.G.); (N.C.); (D.B.); (N.P.); (E.G.)
| | - Giuseppina Granato
- Division of Endocrinology, Diabetes and Metabolism, Department of Medical Science, University of Turin, 10126 Turin, Italy; (I.G.); (G.G.); (N.C.); (D.B.); (N.P.); (E.G.)
| | - Antonio C. Fuentes-Fayos
- Maimonides Institute for Biomedical Research of Córdoba (IMIBIC), Department of Cell Biology, Physiology and Immunology, University of Córdoba and Reina Sofia University Hospital, 14004 Córdoba, Spain; (A.C.F.-F.); (J.P.C.); (R.M.L.)
- CIBER Physiopathology of Obesity and Nutrition (CIBERobn), 28029 Madrid, Spain
| | - Clara V. Alvarez
- Centro de Investigaciones Médicas (CIMUS) e Instituto de Investigaciones Sanitarias, University of Santiago de Compostela and Complexo Hospitalario Universitario of Santiago de Compostela, 14004 Santiago de Compostela, Spain; (C.V.A.); (C.D.)
| | - Carlos Dieguez
- Centro de Investigaciones Médicas (CIMUS) e Instituto de Investigaciones Sanitarias, University of Santiago de Compostela and Complexo Hospitalario Universitario of Santiago de Compostela, 14004 Santiago de Compostela, Spain; (C.V.A.); (C.D.)
| | - Maria Chiara Zatelli
- Section of Endocrinology and Internal Medicine, Department of Medical Sciences, University of Ferrara, 15706 Ferrara, Italy;
| | - Noemi Congiusta
- Division of Endocrinology, Diabetes and Metabolism, Department of Medical Science, University of Turin, 10126 Turin, Italy; (I.G.); (G.G.); (N.C.); (D.B.); (N.P.); (E.G.)
| | - Dana Banfi
- Division of Endocrinology, Diabetes and Metabolism, Department of Medical Science, University of Turin, 10126 Turin, Italy; (I.G.); (G.G.); (N.C.); (D.B.); (N.P.); (E.G.)
| | - Nunzia Prencipe
- Division of Endocrinology, Diabetes and Metabolism, Department of Medical Science, University of Turin, 10126 Turin, Italy; (I.G.); (G.G.); (N.C.); (D.B.); (N.P.); (E.G.)
| | - Sheila Leone
- Department of Pharmacy, G. d’Annunzio University of Chieti-Pescara, 66100 Chieti, Italy; (S.L.); (L.B.)
| | - Luigi Brunetti
- Department of Pharmacy, G. d’Annunzio University of Chieti-Pescara, 66100 Chieti, Italy; (S.L.); (L.B.)
| | - Justo P. Castaño
- Maimonides Institute for Biomedical Research of Córdoba (IMIBIC), Department of Cell Biology, Physiology and Immunology, University of Córdoba and Reina Sofia University Hospital, 14004 Córdoba, Spain; (A.C.F.-F.); (J.P.C.); (R.M.L.)
- CIBER Physiopathology of Obesity and Nutrition (CIBERobn), 28029 Madrid, Spain
| | - Raúl M. Luque
- Maimonides Institute for Biomedical Research of Córdoba (IMIBIC), Department of Cell Biology, Physiology and Immunology, University of Córdoba and Reina Sofia University Hospital, 14004 Córdoba, Spain; (A.C.F.-F.); (J.P.C.); (R.M.L.)
- CIBER Physiopathology of Obesity and Nutrition (CIBERobn), 28029 Madrid, Spain
| | - Renzhi Cai
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, Miller School of Medicine, University of Miami, Miami, FL 33136, USA; (R.C.); (W.S.); (A.V.S.)
- Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL 33125, USA
| | - Wei Sha
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, Miller School of Medicine, University of Miami, Miami, FL 33136, USA; (R.C.); (W.S.); (A.V.S.)
- Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL 33125, USA
| | - Ezio Ghigo
- Division of Endocrinology, Diabetes and Metabolism, Department of Medical Science, University of Turin, 10126 Turin, Italy; (I.G.); (G.G.); (N.C.); (D.B.); (N.P.); (E.G.)
| | - Andrew V. Schally
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, Miller School of Medicine, University of Miami, Miami, FL 33136, USA; (R.C.); (W.S.); (A.V.S.)
- Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL 33125, USA
- Comprehensive Cancer Center, Department of Medicine, Miller School of Medicine, University of Miami, Miami, FL 33136, USA
- Division of Hematology/Oncology, Department of Medicine, Miller School of Medicine, University of Miami, Miami, FL 33136, USA
- Department of Pathology, Miller School of Medicine, University of Miami, Miami, FL 33136, USA
| | - Riccarda Granata
- Division of Endocrinology, Diabetes and Metabolism, Department of Medical Science, University of Turin, 10126 Turin, Italy; (I.G.); (G.G.); (N.C.); (D.B.); (N.P.); (E.G.)
- Correspondence:
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8
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Protective effects of growth hormone-releasing hormone analogs in DSS-induced colitis in mice. Sci Rep 2021; 11:2530. [PMID: 33510215 PMCID: PMC7844299 DOI: 10.1038/s41598-021-81778-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 01/08/2021] [Indexed: 02/07/2023] Open
Abstract
Besides its metabolic and endocrine effects, growth hormone (GH)-releasing hormone (GHRH) is involved in the modulation of inflammation. Recently synthetized GHRH antagonist MIA-690 and MR-409, GHRH agonist, developed by us have shown potent pharmacological effects in various experimental paradigms. However, whether their administration modify resistance to chronic inflammatory stimuli in colon is still unknown. Ex vivo results demonstrated that MIA-690 and MR-409 inhibited production of pro-inflammatory and oxidative markers induced by lipopolysaccharide on isolated mouse colon specimens. In vivo, both MIA-690 and MR-409 have also been able to decrease the responsiveness to nociceptive stimulus, in hot plate test. Additionally, both peptides also induced a decreased sensitivity to acute and persistent inflammatory stimuli in male mice, in formalin test and dextran sodium sulfate (DSS)-induced colitis model, respectively. MIA-690 and MR-409 attenuate DSS-induced colitis with particular regard to clinical manifestations, histopathological damage and release of pro-inflammatory and oxidative markers in colon specimens. Respect to MR-409, MIA-690 showed higher efficacy in inhibiting prostaglandin (PG)E2, 8-iso-PGF2α and serotonin (5-HT) levels, as well as tumor necrosis factor (TNF)-α, interleukin (IL)-6 and nitric oxide synthase gene expression in colon specimens of DSS-induced colitis. Furthermore, MIA-690 decreased serum insulin-like growth factor (IGF)-1 levels in mice DSS-treated, respect to MR-409. Thus, our findings highlight the protective effects of MIA-690 and MR-409 on inflammation stimuli. The higher antinflammatory and antioxidant activities observed with MIA-690 could be related to decreased serum IGF-1 levels.
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9
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Xiong X, Ke X, Wang L, Yao Z, Guo Y, Zhang X, Chen Y, Pang CP, Schally AV, Zhang H. Splice variant of growth hormone-releasing hormone receptor drives esophageal squamous cell carcinoma conferring a therapeutic target. Proc Natl Acad Sci U S A 2020; 117:6726-6732. [PMID: 32156725 PMCID: PMC7104313 DOI: 10.1073/pnas.1913433117] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The extrahypothalamic growth hormone-releasing hormone (GHRH) and its cognate receptors (GHRH-Rs) and splice variants are expressed in a variety of cancers. It has been shown that the pituitary type of GHRH-R (pGHRH-R) mediates the inhibition of tumor growth induced by GHRH-R antagonists. However, GHRH-R antagonists can also suppress some cancers that do not express pGHRH-R, yet the underlying mechanisms have not been determined. Here, using human esophageal squamous cell carcinoma (ESCC) as a model, we were able to reveal that SV1, a known splice variant of GHRH-R, is responsible for the inhibition induced by GHRH-R antagonist MIA-602. We demonstrated that GHRH-R splice variant 1 (SV1) is a hypoxia-driven promoter of tumor progression. Hypoxia-elevated SV1 activates a key glycolytic enzyme, muscle-type phosphofructokinase (PFKM), through the nuclear factor kappa B (NF-κB) pathway, which enhances glycolytic metabolism and promotes progression of ESCC. The malignant actions induced by the SV1-NF-κB-PFKM pathway could be reversed by MIA-602. Altogether, our studies demonstrate a mechanism by which GHRH-R antagonists target SV1. Our findings suggest that SV1 is a hypoxia-induced oncogenic promoter which can be an alternative target of GHRH-R antagonists.
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Affiliation(s)
- Xiao Xiong
- Department of General Surgery, First Affiliated Hospital of Jinan University, 510632 Guangzhou, Guangdong, China
- Institute of Precision Cancer Medicine and Pathology, Jinan University Medical College, 510632 Guangzhou, Guangdong, China
| | - Xiurong Ke
- Department of Immunotherapy and Gastrointestinal Oncology, Affiliated Cancer Hospital of Shantou University Medical College, 515041 Shantou, Guangdong, China
- Department of Surgery, Translational Surgical Oncology, University Medical Center Groningen, University of Groningen, GZ 9713 Groningen, The Netherlands
| | - Lu Wang
- Department of General Surgery, First Affiliated Hospital of Jinan University, 510632 Guangzhou, Guangdong, China
- Institute of Precision Cancer Medicine and Pathology, Jinan University Medical College, 510632 Guangzhou, Guangdong, China
| | - Zhimeng Yao
- Department of General Surgery, First Affiliated Hospital of Jinan University, 510632 Guangzhou, Guangdong, China
- Institute of Precision Cancer Medicine and Pathology, Jinan University Medical College, 510632 Guangzhou, Guangdong, China
- Department of Immunotherapy and Gastrointestinal Oncology, Affiliated Cancer Hospital of Shantou University Medical College, 515041 Shantou, Guangdong, China
| | - Yi Guo
- Endoscopy Center, Affiliated Cancer Hospital of Shantou University Medical College, 515041 Shantou, Guangdong, China
| | - Xianyang Zhang
- Endocrine, Polypeptide, and Cancer Institute, Veterans Affairs Medical Center, Miami, FL 33136
- South Florida Veterans Affairs Foundation for Research and Education, Veterans Affairs Medical Center, Miami, FL 33136
- Interdisciplinary Stem Cell Institute, Miller School of Medicine, University of Miami, Miami, FL 33136
| | - Yuping Chen
- Department of Thoracic Surgery, Affiliated Cancer Hospital of Shantou University Medical College, 515041 Shantou, Guangdong, China
| | - Chi Pui Pang
- Department of Ophthalmology and Visual Sciences, Chinese University of Hong Kong, 999077 Hong Kong, China
- Joint Shantou International Eye Center, Shantou University/Chinese University of Hong Kong, 515041 Shantou, China
| | - Andrew V Schally
- Endocrine, Polypeptide, and Cancer Institute, Veterans Affairs Medical Center, Miami, FL 33136;
- South Florida Veterans Affairs Foundation for Research and Education, Veterans Affairs Medical Center, Miami, FL 33136
- Department of Pathology, Miller School of Medicine, University of Miami, Miami, FL 33136
- Division of Medical Oncology, Department of Medicine, Miller School of Medicine, University of Miami, Miami, FL 33136
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, Miller School of Medicine, University of Miami, Miami, FL 33136
- Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, FL 33136
| | - Hao Zhang
- Department of General Surgery, First Affiliated Hospital of Jinan University, 510632 Guangzhou, Guangdong, China;
- Institute of Precision Cancer Medicine and Pathology, Jinan University Medical College, 510632 Guangzhou, Guangdong, China
- Research Center of Translational Medicine, Second Affiliated Hospital of Shantou University Medical College, 515041 Shantou, Guangdong, China
- Department of Oncology, First Affiliated Hospital of Shantou University Medical College, 515041 Shantou, Guangdong, China
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10
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Leone S, Chiavaroli A, Recinella L, Di Valerio V, Veschi S, Gasparo I, Bitto A, Ferrante C, Orlando G, Salvatori R, Brunetti L. Growth hormone-releasing hormone (GHRH) deficiency promotes inflammation-associated carcinogenesis. Pharmacol Res 2019; 152:104614. [PMID: 31874252 DOI: 10.1016/j.phrs.2019.104614] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 10/25/2019] [Accepted: 12/18/2019] [Indexed: 12/13/2022]
Abstract
The somatotropic axis, in addition to its well-known metabolic and endocrine effects, plays a pivotal role in modulation of inflammation. Moreover, growth hormone (GH)-releasing hormone (GHRH) has been involved in the development of various human tumors. In this work we aimed to investigate the consequences of GHRH deficiency on the development of inflammation-associated colon carcinogenesis in a mouse model of isolated GH deficiency due to generalized ablation of the GHRH gene [GHRH knock out (GHRHKO)]. Homozygous GHRHKO (-/-) male mice and wild type (C57/BL6, +/+) male mice as control group, were used. After azoxymetane (AOM)/dextran sodium sulfate (DSS) treatment -/- mice displayed higher Disease Activity Index (DAI) score, and more marked weight loss compared to +/+ animals. Additionally, -/- mice showed a significant increase in total tumors, in particular of large size predominantly localized in distal colon. In colonic tissue of AOM/DSS-treated -/- mice we found the presence of invasive adenocarcinomas, dysplasia and colitis with mucosal ulceration. Conversely, AOM/DSS-treated +/+ mice showed only presence of adenomas, without invasion of sub-mucosa. Treatment with AOM/DSS significantly increased prostaglandin (PG)E2 and 8-iso-PGF2α levels along with cyclooxygenase-2 (COX-2), tumor necrosis factor (TNF)-α, nuclear factor kappa B (NF-kB) and inducible nitric oxide synthase (iNOS) gene expression, in colon specimens. The degree of increase of all these parameters was more markedly in -/- than +/+ mice. In conclusion, generalized GHRH ablation increases colon carcinogenesis responsiveness in male mice. Whether this results from lack of GH or GHRH remains to be established.
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Affiliation(s)
- Sheila Leone
- Department of Pharmacy, G. d'Annunzio University of Chieti-Pescara, Chieti, Italy
| | - Annalisa Chiavaroli
- Department of Pharmacy, G. d'Annunzio University of Chieti-Pescara, Chieti, Italy
| | - Lucia Recinella
- Department of Pharmacy, G. d'Annunzio University of Chieti-Pescara, Chieti, Italy.
| | - Valentina Di Valerio
- Department of Medicine and Ageing Sciences, G. d'Annunzio University of Chieti-Pescara, Chieti, Italy
| | - Serena Veschi
- Department of Pharmacy, G. d'Annunzio University of Chieti-Pescara, Chieti, Italy
| | - Irene Gasparo
- Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Alessandra Bitto
- Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Claudio Ferrante
- Department of Pharmacy, G. d'Annunzio University of Chieti-Pescara, Chieti, Italy
| | - Giustino Orlando
- Department of Pharmacy, G. d'Annunzio University of Chieti-Pescara, Chieti, Italy
| | - Roberto Salvatori
- Division of Endocrinology Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Luigi Brunetti
- Department of Pharmacy, G. d'Annunzio University of Chieti-Pescara, Chieti, Italy
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11
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Zhang C, Cai R, Lazerson A, Delcroix G, Wangpaichitr M, Mirsaeidi M, Griswold AJ, Schally AV, Jackson RM. Growth Hormone-Releasing Hormone Receptor Antagonist Modulates Lung Inflammation and Fibrosis due to Bleomycin. Lung 2019; 197:541-549. [PMID: 31392398 PMCID: PMC6778540 DOI: 10.1007/s00408-019-00257-w] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 07/29/2019] [Indexed: 12/30/2022]
Abstract
PURPOSE Growth hormone-releasing hormone (GHRH) is a 44-amino acid peptide that regulates growth hormone (GH) secretion. We hypothesized that a GHRH receptor (GHRH-R) antagonist, MIA-602, would inhibit bleomycin-induced lung inflammation and/or fibrosis in C57Bl/6J mice. METHODS We tested whether MIA-602 (5 μg or vehicle given subcutaneously [SC] on days 1-21) would decrease lung inflammation (at day 14) and/or fibrosis (at day 28) in mice treated with intraperitoneal (IP) bleomycin (0.8 units on days 1, 3, 7, 10, 14, and 21). Bleomycin resulted in inflammation and fibrosis around airways and vessels evident histologically at days 14 and 28. RESULTS Inflammation (histopathologic scores assessed blindly) was visibly less evident in mice treated with MIA-602 for 14 days. After 28 days, lung hydroxyproline (HP) content increased significantly in mice treated with vehicle; in contrast, lung HP did not increase significantly compared to naïve controls in mice treated with GHRH-R antagonist. GHRH-R antagonist increased basal and maximal oxygen consumption of cultured lung fibroblasts. Multiple genes related to chemotaxis, IL-1, chemokines, regulation of inflammation, and extracellular signal-regulated kinases (ERK) were upregulated in lungs of mice treated with bleomycin and MIA-602. MIA-602 also prominently suppressed multiple genes related to the cellular immune response including those for T-cell differentiation, receptor signaling, activation, and cytokine production. CONCLUSIONS MIA-602 reduced lung inflammation and fibrosis due to bleomycin. Multiple genes related to immune response and T-cell functions were downregulated, supporting the view that MIA-602 can modulate the cellular immune response to bleomycin lung injury.
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Affiliation(s)
| | - Renzhi Cai
- Research Service, Miami VAHS, Miami, FL, 33125, USA
| | - Aaron Lazerson
- Department of Comparative Pathology, University of Miami, Miami, FL, 33101, USA
| | | | | | - Mehdi Mirsaeidi
- Research Service, Miami VAHS, Miami, FL, 33125, USA
- Department of Medicine, University of Miami, Miami, FL, 33101, USA
| | - Anthony J Griswold
- Dr. John T. MacDonald Foundation Department of Human Genetics, University of Miami, Miami, FL, 33101, USA
| | - Andrew V Schally
- Research Service, Miami VAHS, Miami, FL, 33125, USA
- Department of Medicine, University of Miami, Miami, FL, 33101, USA
- Department of Pathology and Sylvester Cancer Center, University of Miami Miller School of Medicine, Miami, FL, 33101, USA
| | - Robert M Jackson
- Research Service, Miami VAHS, Miami, FL, 33125, USA.
- Department of Medicine, University of Miami, Miami, FL, 33101, USA.
- Research Service, Miami VAHS, 1201 NW 16th Street, Miami, FL, 33125, USA.
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12
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Increased pain and inflammatory sensitivity in growth hormone-releasing hormone (GHRH) knockout mice. Prostaglandins Other Lipid Mediat 2019; 144:106362. [PMID: 31301405 DOI: 10.1016/j.prostaglandins.2019.106362] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 06/04/2019] [Accepted: 07/09/2019] [Indexed: 02/06/2023]
Abstract
Growth hormone (GH) and GH-releasing hormone (GHRH), in addition to metabolic and endocrine effects, play a role in the modulation of pain and inflammation. We aimed to elucidate the consequences of GHRH deficiency on acute nociceptive stimulation and on both acute and chronic inflammatory stimuli in a mouse model of GH deficiency. Mice with generalized ablation of the GHRH gene (GHRH knock out, GHRHKO, -/-) were compared to wild type (GHRH +/+) mice. Responsiveness to acute nociceptive stimulation and to acute inflammatory stimulation was evaluated by conventional hot plate apparatus and formalin test, respectively. We also evaluated responsiveness to colonic inflammation induced both in vivo, after dextran sodium sulfate (DSS) treatment, or ex vivo, by incubating colon segments with bacterial lipopolysaccaride (LPS). Macroscopical and histological examinations were performed, prostaglandin (PG) E2 and 8-iso-PGF2α levels and cyclooxigenase (COX)-2 and tumor necrosis factor (TNF)-α gene expression were measured. Compared to controls, -/- mice showed decreased response latency during the hot plate test, and increased licking/biting time in formalin test, particularly in the second phase of inflammation. DSS treated -/- mice showed a significant increase of colonic inflammation compared to controls. Moreover DSS treatment increased PGE2 and 8-iso-PGF2α levels, along with COX-2 and TNF-α gene expression more markedly in colon specimens of -/- mice compared to controls. LPS-induced PGE2 and 8-iso-PGF2α production from colonic segments incubated ex vivo was also increased in -/- mice. Generalized GHRH gene ablation increases sensitivity to thermal pain and both acute and persistent inflammatory stimuli in male mice.
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13
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Ren JL, Yu QX, Ma D, Liang WC, Leung PY, Ng TK, Chu WK, Schally AV, Pang CP, Chan SO. Growth hormone-releasing hormone receptor mediates cytokine production in ciliary and iris epithelial cells during LPS-induced ocular inflammation. Exp Eye Res 2019; 181:277-284. [PMID: 30831084 DOI: 10.1016/j.exer.2019.02.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 02/23/2019] [Accepted: 02/23/2019] [Indexed: 12/18/2022]
Abstract
The receptor for growth hormone-releasing hormone (GHRH-R) has been shown to upregulate specifically in the ciliary and iris epithelial cells and infiltrating cells in the aqueous humor in a rat model of acute anterior uveitis. Treatment with GHRHR-R antagonist alleviates significantly these inflammatory responses. Herein we investigated whether the ciliary and iris epithelial cells can respond directly to lipopolysaccharide (LPS) without the influences of circulating leukocytes to produce inflammatory mediators through a GHRH-R mediated mechanism. In explant cultures of rat ciliary body and iris, LPS caused a substantial increase of GHRH-R in 24 h. Immunohistochemistry showed a localization of TLR4, the receptor for LPS, and an elevated expression of IL-6 and IL-1β in ciliary and iris epithelial cells after LPS treatment. LPS also elevated the level of IL-1β, IL-6, and iNOS and increased secretion of IL-1β and IL-6 from the explants. The GHRH-R antagonist, MIA-602, suppressed the elevated expression of IL-1β and IL-6, and reduced the release of IL-6. Such effects were not seen for the GHRHR agonist, MR-409. When co-cultured with leukocytes, expression of GHRH-R in the ocular explants was further enhanced during LPS treatment. Our results demonstrate a direct action of LPS on ciliary and iris epithelial cells to produce pro-inflammatory factors through a GHRH-R mediated mechanism, and suggest a role of these epithelial cells, in addition to the resident antigen presenting cells, in immune surveillance of the eye. Infiltrating leukocytes may enhance these inflammatory responses by regulating GHRH-R in ciliary and iris epithelial cells, in addition to their functions of synthesizing proinflammatory cytokines.
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MESH Headings
- Animals
- Aqueous Humor/metabolism
- Ciliary Body/metabolism
- Ciliary Body/pathology
- Cytokines/biosynthesis
- Disease Models, Animal
- Eye Infections, Bacterial/genetics
- Eye Infections, Bacterial/metabolism
- Eye Infections, Bacterial/pathology
- Gene Expression Regulation
- Immunohistochemistry
- Iris/metabolism
- Male
- RNA/genetics
- Rats
- Rats, Sprague-Dawley
- Receptors, Neuropeptide/biosynthesis
- Receptors, Neuropeptide/genetics
- Receptors, Pituitary Hormone-Regulating Hormone/biosynthesis
- Receptors, Pituitary Hormone-Regulating Hormone/genetics
- Uveitis, Anterior/genetics
- Uveitis, Anterior/metabolism
- Uveitis, Anterior/pathology
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Affiliation(s)
- Jia Lin Ren
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong
| | - Qiu Xiao Yu
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong
| | - Ding Ma
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong
| | - Wei Cheng Liang
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong
| | - Pui Ying Leung
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong
| | - Tsz Kin Ng
- Department of Ophthalmology & Visual Science, The Chinese University of Hong Kong, Hong Kong
| | - Wai Kit Chu
- Department of Ophthalmology & Visual Science, The Chinese University of Hong Kong, Hong Kong
| | - Andrew V Schally
- Endocrine, Polypeptide, and Cancer Institute, Veterans Affairs Medical Center, USA; Divisions of Hematology/Oncology and Endocrinology, Department of Medicine and Department of Pathology, Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Chi Pui Pang
- Department of Ophthalmology & Visual Science, The Chinese University of Hong Kong, Hong Kong.
| | - Sun-On Chan
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong.
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14
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Agonists of growth hormone-releasing hormone (GHRH) inhibit human experimental cancers in vivo by down-regulating receptors for GHRH. Proc Natl Acad Sci U S A 2018; 115:12028-12033. [PMID: 30373845 DOI: 10.1073/pnas.1813375115] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
The effects of the growth hormone-releasing hormone (GHRH) agonist MR409 on various human cancer cells were investigated. In H446 small cell lung cancer (SCLC) and HCC827 and H460 (non-SCLC) cells, MR409 promoted cell viability, reduced cell apoptosis, and induced the production of cellular cAMP in vitro. Western blot analyses showed that treatment of cancer cells with MR409 up-regulated the expression of cyclins D1 and D2 and cyclin-dependent kinases 4 and 6, down-regulated p27kip1, and significantly increased the expression of the pituitary-type GHRH receptor (pGHRH-R) and its splice-variant (SV1). Hence, in vitro MR409 exerts agonistic action on lung cancer cells in contrast to GHRH antagonists. However, in vivo, MR409 inhibited growth of lung cancers xenografted into nude mice. MR409 given s.c. at 5 μg/day for 4 to 8 weeks significantly suppressed growth of HCC827, H460, and H446 tumors by 48.2%, 48.7%, and 65.6%, respectively. This inhibition of tumor growth by MR409 was accompanied by the down-regulation of the expression of pGHRH-R and SV1 in the pituitary gland and tumors. Tumor inhibitory effects of MR409 in vivo were also observed in other human cancers, including gastric, pancreatic, urothelial, prostatic, mammary, and colorectal. This inhibition of tumor growth parallel to the down-regulation of GHRH-Rs is similar and comparable to the suppression of sex hormone-dependent cancers after the down-regulation of receptors for luteinizing hormone-releasing hormone (LHRH) by LHRH agonists. Further oncological investigations with GHRH agonists are needed to elucidate the underlying mechanisms.
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15
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Girgert R, Emons G, Gründker C. Inhibition of growth hormone receptor by Somavert reduces expression of GPER and prevents growth stimulation of triple-negative breast cancer by 17β-estradiol. Oncol Lett 2018; 15:9559-9566. [PMID: 29805678 DOI: 10.3892/ol.2018.8521] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Accepted: 03/02/2018] [Indexed: 12/12/2022] Open
Abstract
Currently, conventional chemotherapy is the only treatment option for triple-negative breast cancers (TNBC) due to a lack of a unique target. In TNBC, a high expression of the membrane bound G protein-coupled estrogen receptor (GPER), correlates with a worse outcome. There is a potential for an association between growth hormone receptor (GHR) and GPER expression. To confirm this hypothesis, GHR was inhibited in TNBC cells with Somavert, and GPER expression levels, and the effect on signal transduction and proliferation induction in TNBC cells were analyzed. Proliferation of TNBC cells was measured using an Alamar-blue assay. Expression of GPER and activation of c-src and epidermal growth factor receptor (EGFR) by 17β-estradiol was analyzed by western blotting. Induction of c-fos, cyclin D1 and aromatase expression was determined by reverse transcription-semi-quantitative polymerase chain reaction. The expression of GPER was concentration- and time-dependently reduced by Somavert down to 46±7% (P<0.01) of the control. Furthermore, 17β-estradiol significantly increased the cell number of HCC1806 cells to 128±14% (P<0.05), and that of MDA-MB-453 cells to 115±3%. This increase in cell number was reduced to 103±11% in HCC1806 cells in which GPER expression was downregulated by Somavert, and to 102±3% in MDA-MB-453 cells. In addition, 17β-estradiol increased the activation of c-src in HCC1806 cells by 1.8-fold, and Somavert reduced p-src to 63% of control. In MDA-MB-453 cells src phosphorylation increased by 7-fold upon stimulation with estradiol, but after treatment with Somavert only a 4-fold increase was observed. Phosphorylation of EGFR was increased by 2.2-fold of control in HCC1806 cells by 17β-estradiol, and by 1.4-fold in MDA-MD-453 cells. Somavert completely prevented this activation. Induction of cyclin D1 and aromatase expression by 17β-estradiol was also prevented by Somavert. Somavert reduces GPER expression in triple negative breast cancer cells. Treatment with Somavert prevents induction of genes regulating proliferation by 17β-estradiol. Inhibition of GPER expression is a promising therapeutic intervention for TNBC.
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Affiliation(s)
- Rainer Girgert
- Department of Obstetrics and Gynecology, University Medical Center Goettingen, D-37075 Goettingen, Germany
| | - Günter Emons
- Department of Obstetrics and Gynecology, University Medical Center Goettingen, D-37075 Goettingen, Germany
| | - Carsten Gründker
- Department of Obstetrics and Gynecology, University Medical Center Goettingen, D-37075 Goettingen, Germany
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16
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Wang H, Zhang X, Vidaurre I, Cai R, Sha W, Schally AV. Inhibition of experimental small-cell and non-small-cell lung cancers by novel antagonists of growth hormone-releasing hormone. Int J Cancer 2018; 142:2394-2404. [PMID: 29435973 DOI: 10.1002/ijc.31308] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 12/14/2017] [Accepted: 01/31/2018] [Indexed: 12/13/2022]
Abstract
We investigated the effects of novel antagonists of growth hormone releasing hormone (GHRH)-MIA602 and MIA690-on three human small cell lung cancer (SCLC) lines (H446, DMS53 and H69) and two non-SCLC (NSCLC) lines (HCC827 and H460). In vitro exposure of cancer cells to these GHRH antagonists significantly inhibited cell viability, increased cell apoptosis, decrease cellular levels of cAMP and reduced cell migration. In vivo, the antagonists strongly inhibited tumor growth in xenografted nude mice models. Subcutaneous administration of MIA602 at the dose of 5 μg/day for 4-8 weeks reduced the growth of HCC827, H460 and H446 tumors by 69.9%, 68.3% and 53.4%, respectively, while MIA690 caused a reduction of 76.8%, 58.3% and 54.9%, respectively. Western blot and qRT-PCR analyses demonstrated a downregulation of expression of the pituitary-type GHRH-R and its splice-variant, cyclinD1/2, cyclin-dependent kinase4/6, p21-activated kinase-1, phosphorylation of activator of transcription 3 and cAMP response element binding protein; and an upregulation of expression of E-cadherin, β-catenin and P27kip1 in cancer cells and in xenografted tumor tissues. The study demonstrates the involvement of GHRH antagonists in multiple signaling pathways in lung cancers. Our findings suggest the merit of further investigation with these GHRH antagonists on the management of both SCLC and NSCLC.
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Affiliation(s)
- Haibo Wang
- Interdisciplinary Stem Cell Institute, Miller School of Medicine, University of Miami, Miami, FL.,Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL.,South Florida Veterans Affairs Foundation for Research and Education, Miami, FL
| | - Xianyang Zhang
- Interdisciplinary Stem Cell Institute, Miller School of Medicine, University of Miami, Miami, FL.,Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL.,South Florida Veterans Affairs Foundation for Research and Education, Miami, FL
| | - Irving Vidaurre
- Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL.,South Florida Veterans Affairs Foundation for Research and Education, Miami, FL
| | - Renzhi Cai
- Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL.,South Florida Veterans Affairs Foundation for Research and Education, Miami, FL.,Department of Medicine, Divisions of Endocrinology and Hematology/Oncology, Miller School of Medicine, University of Miami, Miami, FL
| | - Wei Sha
- Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL.,South Florida Veterans Affairs Foundation for Research and Education, Miami, FL.,Department of Medicine, Divisions of Endocrinology and Hematology/Oncology, Miller School of Medicine, University of Miami, Miami, FL
| | - Andrew V Schally
- Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL.,South Florida Veterans Affairs Foundation for Research and Education, Miami, FL.,Department of Pathology, Miller School of Medicine, University of Miami, Miami, FL.,Department of Medicine, Divisions of Endocrinology and Hematology/Oncology, Miller School of Medicine, University of Miami, Miami, FL.,Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, FL
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17
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Stewart TS, Nagesetti A, Guduru R, Liang P, Stimphil E, Hadjikhani A, Salgueiro L, Horstmyer J, Cai R, Schally A, Khizroev S. Magnetoelectric nanoparticles for delivery of antitumor peptides into glioblastoma cells by magnetic fields. Nanomedicine (Lond) 2018; 13:423-438. [PMID: 29345190 PMCID: PMC5810849 DOI: 10.2217/nnm-2017-0300] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 12/11/2017] [Indexed: 12/15/2022] Open
Abstract
AIM We studied externally controlled anticancer effects of binding tumor growth inhibiting synthetic peptides to magnetoelectric nanoparticles (MENs) on treatment of glioblastomas. METHODS Hydrothermally synthesized 30-nm MENs had the core-shell composition of CoFe2O4@BaTiO3. Molecules of growth hormone-releasing hormone antagonist of the MIA class (MIA690) were chemically bound to MENs. In vitro experiments utilized human glioblastoma cells (U-87MG) and human brain microvascular endothelial cells. RESULTS The studies demonstrated externally controlled high-efficacy binding of MIA690 to MENs, targeted specificity to glioblastoma cells and on-demand release of the peptide by application of d.c. and a.c. magnetic fields, respectively. CONCLUSION The results support the use of MENs as an effective drug delivery carrier for growth hormone-releasing hormone antagonists in the treatment of human glioblastomas.
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Affiliation(s)
- Tiffanie S Stewart
- Center for Personalized Nanomedicine, Florida International University, Miami, FL, USA
- Center for Nano Science & Technology, University of Notre Dame, Notre Dame, IN, USA
| | - Abhignyan Nagesetti
- Center for Personalized Nanomedicine, Florida International University, Miami, FL, USA
| | - Rakesh Guduru
- Center for Personalized Nanomedicine, Florida International University, Miami, FL, USA
| | - Ping Liang
- Cellular Nanomed, Coral Springs, FL, USA
| | - Emmanuel Stimphil
- Center for Personalized Nanomedicine, Florida International University, Miami, FL, USA
| | - Ali Hadjikhani
- Center for Personalized Nanomedicine, Florida International University, Miami, FL, USA
| | - Luis Salgueiro
- Veterans Affairs Medical Center, University of Miami School of Medicine, Miami, FL, USA
| | | | - Renzhi Cai
- Veterans Affairs Medical Center, University of Miami School of Medicine, Miami, FL, USA
| | - Andrew Schally
- Veterans Affairs Medical Center, University of Miami School of Medicine, Miami, FL, USA
| | - Sakhrat Khizroev
- Center for Personalized Nanomedicine, Florida International University, Miami, FL, USA
- Brain Center, Miami, FL, USA
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18
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Girgert R, Emons G, Gründker C. Estrogen Signaling in ERα-Negative Breast Cancer: ERβ and GPER. Front Endocrinol (Lausanne) 2018; 9:781. [PMID: 30687231 PMCID: PMC6333678 DOI: 10.3389/fendo.2018.00781] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Accepted: 12/12/2018] [Indexed: 01/22/2023] Open
Abstract
Estrogen receptors are important regulators of the growth of breast tumors. Three different receptors for estrogens have been identified in breast tumors, two nuclear receptors, ERα and ERβ, and a G-protein coupled estrogen receptor 1 (GPER) that initiates non-genomic effects of estrogens in the cytosol. Recent findings show that the stimulation of cytoplasmic ERα and ERβ also triggers non-genomic signaling pathways. The treatment of breast cancer with anti-estrogens depends on the presence of ERα. About 40% of all breast cancers, however, do not express ERα. One subgroup of these tumors overexpress Her-2, another important group is designated as triple-negative breast cancer, as they neither express ERα, nor progesterone receptors, nor do they overexpress Her-2. This review addresses the signaling of ERβ and GPER in ERα-negative breast tumors. In addition to the well-established EGF-receptor transactivation pathways of GPER, more recent findings of GPER-dependent activation of FOXO3a, the Hippo-pathway, and HOTAIR-activation are summarized.
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19
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Expression of GHRH-R, a Potentially Targetable Biomarker, in Triple-negative Breast Cancer. Appl Immunohistochem Mol Morphol 2017; 26:1-5. [PMID: 29206714 DOI: 10.1097/pai.0000000000000622] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
PURPOSE Growth hormone-releasing hormone (GHRH) has been shown to modify the growth behavior of many cancers, including breast. GHRH is produced by tumor cells, acts in an autocrine/paracrine manner, and requires the presence of GHRH receptor (GHRH-R) on the tumor cells to exert its effects. GHRH activity can be effectively blocked by synthetic antagonists of its receptor and hence, the expression of GHRH-R by tumor cells could serve as a predictor of response to GHRH-R antagonist therapy. In this study, we investigated the expression of GHRH-R in triple-negative breast cancers (TNBC). As TNBCs are morphologically and immunophenotypically heterogenous, the staining results were also correlated with the histologic subtypes of these tumors. MATERIALS AND METHODS On the basis of histomorphology and immunophenotype, 134 cases of primary TNBCs were further subdivided into medullary, metaplastic, apocrine, and invasive ductal carcinomas of no special type (IDC-NST). Immunohistochemistry for GHRH-R was performed on paraffin sections and the staining results were assessed semiquantitatively as negative, low expression, moderate, and high expression. RESULTS Of the 134 TNBCs, 85 were classified as IDC-NST, 25 as metaplastic, 16 as medullary, and 8 as apocrine carcinoma. Overall, positive reaction for GHRH-R was seen in 77 (57%) of tumors including 66 (77.6%) of IDC-NST. All medullary carcinomas were negative for GHRH-R and, with the exception of 1 case with low expression, none of the metaplastic carcinomas expressed GHRH-R (P<0.005). CONCLUSIONS A considerable number of TNBCs are positive for GHRH-R as a predictor of potential response to anti-GHRH-R treatment. This expression however, varies considerably between histologic subtypes of triple-negative breast cancers. Although most medullary and metaplastic carcinomas do not express GHRH-R, three fourths of the IDC-NST show a positive reaction. Testing for GHRH-R expression is therefore advisable if anti-GHRH-R therapy is being considered.
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20
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Dubovy SR, Fernandez MP, Echegaray JJ, Block NL, Unoki N, Perez R, Vidaurre I, Lee RK, Nadji M, Schally AV. Expression of hypothalamic neurohormones and their receptors in the human eye. Oncotarget 2017; 8:66796-66814. [PMID: 28977997 PMCID: PMC5620137 DOI: 10.18632/oncotarget.18358] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2017] [Accepted: 05/20/2017] [Indexed: 12/27/2022] Open
Abstract
Extrapituitary roles for hypothalamic neurohormones have recently become apparent and clinically relevant, based on the use of synthetic peptide analogs for the treatment of multiple conditions including cancers, pulmonary edema and myocardial infarction. In the eye, it has been suggested that some of these hormones and their receptors may be present in the ciliary body, iris, trabecular meshwork and retina, but their physiological role has yet to be elucidated. Our study intends to comprehensively demonstrate the expression of some hypothalamic neuroendocrine hormones and their receptors within different retinal and extraretinal structures of the human eye. Immunofluorescence, Western blot analysis, and RT-PCR were used to evaluate the qualitative and quantitative expression of Luteinizing Hormone Releasing Hormone (LHRH), Growth Hormone Releasing Hormone (GHRH), Thyrotropin Releasing Hormone (TRH), Gastrin Releasing Peptide (GRP) and Somatostatin as well as their respective receptors (LHRH-R, GHRH-R, TRH-R, GRP-R, SST-R1) in cadaveric human eye tissue and in paraffinized human eye tissue sections. The hypothalamic hormones LHRH, GHRH, TRH, GRP and Somatostatin and their respective receptors (LHRH-R, GHRH-R, TRH-R, GRPR/BB2 and SST-R1), were expressed in the conjunctiva, cornea, trabecular meshwork, ciliary body, lens, retina, and optic nerve.
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Affiliation(s)
- Sander R Dubovy
- Florida Lions Ocular Pathology Laboratory, Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, Florida, USA.,Department of Pathology, University of Miami, Miller School of Medicine, Miami, Florida, USA
| | - Maria P Fernandez
- Florida Lions Ocular Pathology Laboratory, Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, Florida, USA
| | - Jose J Echegaray
- Florida Lions Ocular Pathology Laboratory, Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, Florida, USA.,Department of Ophthalmology, University of Puerto Rico School of Medicine, San Juan, PR, USA
| | - Norman L Block
- Department of Pathology, University of Miami, Miller School of Medicine, Miami, Florida, USA.,Divisions of Hematology/Oncology, Endocrinology, Department of Medicine, University of Miami, Miller School of Medicine, Miami, Florida, USA
| | - Noriyuki Unoki
- Florida Lions Ocular Pathology Laboratory, Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, Florida, USA
| | - Roberto Perez
- Miami Veterans Affairs Medical Center, Miami, Florida, USA.,Divisions of Hematology/Oncology, Endocrinology, Department of Medicine, University of Miami, Miller School of Medicine, Miami, Florida, USA
| | | | - Richard K Lee
- Florida Lions Ocular Pathology Laboratory, Bascom Palmer Eye Institute, University of Miami, Miller School of Medicine, Miami, Florida, USA
| | - Mehrdad Nadji
- Department of Pathology, University of Miami, Miller School of Medicine, Miami, Florida, USA
| | - Andrew V Schally
- Miami Veterans Affairs Medical Center, Miami, Florida, USA.,Department of Pathology, University of Miami, Miller School of Medicine, Miami, Florida, USA.,Divisions of Hematology/Oncology, Endocrinology, Department of Medicine, University of Miami, Miller School of Medicine, Miami, Florida, USA
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21
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Zarandi M, Cai R, Kovacs M, Popovics P, Szalontay L, Cui T, Sha W, Jaszberenyi M, Varga J, Zhang X, Block NL, Rick FG, Halmos G, Schally AV. Synthesis and structure-activity studies on novel analogs of human growth hormone releasing hormone (GHRH) with enhanced inhibitory activities on tumor growth. Peptides 2017; 89:60-70. [PMID: 28130121 DOI: 10.1016/j.peptides.2017.01.009] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2016] [Revised: 01/10/2017] [Accepted: 01/23/2017] [Indexed: 12/21/2022]
Abstract
The syntheses and biological evaluations of new GHRH analogs of Miami (MIA) series with greatly increased anticancer activity are described. In the design and synthesis of these analogs, the following previous substitutions were conserved: D-Arg2, Har9, Abu15, and Nle27. Most new analogs had Ala at position 8. Since replacements of both Lys12 and Lys21 with Orn increased resistance against enzymatic degradation, these modifications were kept. The substitutions of Arg at both positions 11 and 20 by His were also conserved. We kept D-Arg28, Har29 -NH2 at the C-terminus or inserted Agm or 12-amino dodecanoic acid amide at position 30. We incorporated pentafluoro-Phe (Fpa5), instead of Cpa, at position 6 and Tyr(Me) at position 10 and ω-amino acids at N-terminus of some analogs. These GHRH analogs were prepared by solid-phase methodology and purified by HPLC. The evaluation of the activity of the analogs on GH release was carried out in vitro on rat pituitaries and in vivo in male rats. Receptor binding affinities were measured in vitro by the competitive binding analysis. The inhibitory activity of the analogs on tumor proliferation in vitro was tested in several human cancer cell lines such as HEC-1A endometrial adenocarcinoma, HCT-15 colorectal adenocarcinoma, and LNCaP prostatic carcinoma. For in vivo tests, various cell lines including PC-3 prostate cancer, HEC-1A endometrial adenocarcinoma, HT diffuse mixed β cell lymphoma, and ACHN renal cell carcinoma cell lines were xenografted into nude mice and treated subcutaneously with GHRH antagonists at doses of 1-5μg/day. Analogs MIA-602, MIA-604, MIA-610, and MIA-640 showed the highest binding affinities, 30, 58, 48, and 73 times higher respectively, than GHRH (1-29) NH2. Treatment of LNCaP and HCT-15 cells with 5μM MIA-602 or MIA-690 decreased proliferation by 40%-80%. In accord with previous tests in various human cancer lines, analog MIA-602 showed high inhibitory activity in vivo on growth of PC-3 prostate cancer, HT-mixed β cell lymphoma, HEC-1A endometrial adenocarcinoma and ACHN renal cell carcinoma. Thus, GHRH analogs of the Miami series powerfully suppress tumor growth, but have only a weak endocrine GH inhibitory activity. The suppression of tumor growth could be induced in part by the downregulation of GHRH receptors levels.
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Affiliation(s)
- Marta Zarandi
- Endocrine, Polypeptide, and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, United States; South Florida VA Foundation for Research and Education, Miami, FL, United States; Department of Pathology, Department of Medicine, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Renzhi Cai
- Endocrine, Polypeptide, and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, United States; South Florida VA Foundation for Research and Education, Miami, FL, United States; Department of Pathology, Department of Medicine, University of Miami Miller School of Medicine, Miami, FL, United States; Division of Endocrinology, Department of Medicine, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Magdolna Kovacs
- Endocrine, Polypeptide, and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, United States; South Florida VA Foundation for Research and Education, Miami, FL, United States; Department of Pathology, Department of Medicine, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Petra Popovics
- Endocrine, Polypeptide, and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, United States; South Florida VA Foundation for Research and Education, Miami, FL, United States; Division of Endocrinology, Department of Medicine, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Luca Szalontay
- Endocrine, Polypeptide, and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, United States; South Florida VA Foundation for Research and Education, Miami, FL, United States; Department of Pathology, Department of Medicine, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Tengjiao Cui
- Endocrine, Polypeptide, and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, United States; South Florida VA Foundation for Research and Education, Miami, FL, United States; Department of Pathology, Department of Medicine, University of Miami Miller School of Medicine, Miami, FL, United States; Division of Endocrinology, Department of Medicine, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Wei Sha
- Endocrine, Polypeptide, and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, United States; Division of Endocrinology, Department of Medicine, University of Miami Miller School of Medicine, Miami, FL, United States; Division of Hematology/Oncology, Department of Medicine, University of Miami Miller School of Medicine, Miami, FL, United States; Sylvester Comprehensive Cancer Center, Miami, FL, United States
| | - Miklos Jaszberenyi
- Endocrine, Polypeptide, and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, United States; South Florida VA Foundation for Research and Education, Miami, FL, United States; Department of Pathology, Department of Medicine, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Jozsef Varga
- Endocrine, Polypeptide, and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, United States
| | - XianYang Zhang
- Endocrine, Polypeptide, and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, United States; South Florida VA Foundation for Research and Education, Miami, FL, United States; Interdisciplinary Stem Cell Institute, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Norman L Block
- South Florida VA Foundation for Research and Education, Miami, FL, United States; Department of Pathology, Department of Medicine, University of Miami Miller School of Medicine, Miami, FL, United States; Sylvester Comprehensive Cancer Center, Miami, FL, United States; Interdisciplinary Stem Cell Institute, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Ferenc G Rick
- Endocrine, Polypeptide, and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, United States; South Florida VA Foundation for Research and Education, Miami, FL, United States; Department of Urology, Florida International University, Herbert Wertheim College of Medicine, Miami, FL, United States
| | - Gabor Halmos
- Endocrine, Polypeptide, and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, United States; South Florida VA Foundation for Research and Education, Miami, FL, United States
| | - Andrew V Schally
- Endocrine, Polypeptide, and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, United States; South Florida VA Foundation for Research and Education, Miami, FL, United States; Department of Pathology, Department of Medicine, University of Miami Miller School of Medicine, Miami, FL, United States; Division of Endocrinology, Department of Medicine, University of Miami Miller School of Medicine, Miami, FL, United States; Division of Hematology/Oncology, Department of Medicine, University of Miami Miller School of Medicine, Miami, FL, United States; Sylvester Comprehensive Cancer Center, Miami, FL, United States.
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22
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Köster F, Jin L, Shen Y, Schally AV, Cai RZ, Block NL, Hornung D, Marschner G, Rody A, Engel JB, Finas D. Effects of an Antagonistic Analog of Growth Hormone-Releasing Hormone on Endometriosis in a Mouse Model and In Vitro. Reprod Sci 2017; 24:1503-1511. [PMID: 28205459 DOI: 10.1177/1933719117691140] [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] [Indexed: 01/26/2023]
Abstract
Endometriosis is a benign gynecologic disorder causing dysmenorrhea, pelvic pain, and subfertility. Receptors for the growth hormone-releasing hormone (GHRH) were found in endometriotic tissues. Antagonists of GHRH have been used to inhibit the growth of endometriotic endometrial stromal cells. In this study, the GHRH receptor splice variant (SV) 1 was detected in human endometrial tissue samples by Western blots and quantitative reverse transcription polymerase chain reaction (qRT-PCR). The highest messenger RNA (mRNA) and protein levels of SV1 were found in eutopic endometrium from patients with endometriosis compared to ectopic endometriotic tissues and endometrium from normal patients. The highest expression for GHRH mRNA was found by qRT-PCR in ectopic endometriosis lesions. In an in vivo mouse model with human endometrial explants from patients with endometriosis, 10 μg MIA-602 per day resulted in significantly smaller human endometrial xenotransplants after 4 weeks compared to mice treated with vehicle. The endometrial tissues expressed SV1 before and after xenotransplantation. The proliferation of endometrial stromal cells as well as the endometriosis cell lines 12-Z and 49-Z was decreased by exposure to 1 μM MIA-602 after 72 hours. The protein levels of epithelial growth factor receptors in 12-Z and 49-Z cell lines were reduced 48 and 72 hours after the administration of 1 μM MIA-602. MIA-602 decreased the activation of the MAP-kinases ERK-1/2. Our study demonstrates the presence of SV1 receptor as a target for treatment with GHRH antagonist in endometriosis. Endometrial tissues respond to MIA-602 with inhibition of proliferation in vitro and in vivo. The use of MIA-602 could be an effective supplement to the treatment strategies in endometriosis.
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Affiliation(s)
- Frank Köster
- 1 Department of Gynecology and Obstetrics, University of Lübeck, Lübeck, Germany
| | - Li Jin
- 2 Department of Gynecology and Obstetrics, The International Peace Maternity & Child Health Hospital of China Welfare Institute, China
| | - Yuanming Shen
- 3 Department of Gynecology and Obstetrics, The Women's Hospital, School of Medicine, Zhejiang University, Zhejiang Province, People's Republic of China
| | - Andrew V Schally
- 4 Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, USA.,5 Department of Pathology, Miller School of Medicine, University of Miami, Miami, FL, USA.,6 Divisions of Hematology/Oncology and Endocrinology, Department of Medicine, Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Ren-Zhi Cai
- 4 Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, USA.,5 Department of Pathology, Miller School of Medicine, University of Miami, Miami, FL, USA.,6 Divisions of Hematology/Oncology and Endocrinology, Department of Medicine, Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Norman L Block
- 4 Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, USA.,5 Department of Pathology, Miller School of Medicine, University of Miami, Miami, FL, USA.,6 Divisions of Hematology/Oncology and Endocrinology, Department of Medicine, Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Daniela Hornung
- 7 Department of Gynecology and Obstetrics, Diakonissenkrankenhaus Karlsruhe Rüppurr, Karlsruhe, Germany
| | - Gabriele Marschner
- 1 Department of Gynecology and Obstetrics, University of Lübeck, Lübeck, Germany
| | - Achim Rody
- 1 Department of Gynecology and Obstetrics, University of Lübeck, Lübeck, Germany
| | - Jörg B Engel
- 8 Department of Gynecology and Obstetrics, Krankenhaus Nordwest, Frankfurt am Main, Germany
| | - Dominique Finas
- 9 Department of Gynecology and Obstetrics, Evangelic Hospital Bielefeld, Bielefeld, Germany
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23
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Antagonists of growth hormone-releasing hormone inhibit proliferation induced by inflammation in prostatic epithelial cells. Proc Natl Acad Sci U S A 2017; 114:1359-1364. [PMID: 28123062 DOI: 10.1073/pnas.1620884114] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
The etiology of benign prostatic hyperplasia (BPH) is multifactorial, and chronic inflammation plays a pivotal role in its pathogenesis. Growth hormone-releasing hormone (GHRH) is a hypothalamic neuropeptide that has been shown to act as paracrine/autocrine factor in various malignancies including prostate cancer. GHRH and its receptors are expressed in experimental models of BPH, in which antagonists of GHRH suppressed the levels of proinflammatory cytokines and altered the expression of genes related to epithelial-to-mesenchymal transition (EMT). We investigated the effects of GHRH antagonist on prostatic enlargement induced by inflammation. Autoimmune prostatitis in Balb/C mice was induced by a homogenate of reproductive tissues of male rats. During the 8-wk induction of chronic prostatitis, we detected a progressive increase in prostatic volume reaching 92% at week 8 compared with control (P < 0.001). Daily treatment for 1 mo with GHRH antagonist MIA-690 caused a 30% reduction in prostate volume (P < 0.05). Conditioned medium derived from macrophages increased the average volume of spheres by 82.7% (P < 0.001) and elevated the expression of mRNA for N-cadherin, Snail, and GHRH GHRH antagonist reduced the average volume of spheres stimulated by inflammation by 75.5% (P < 0.05), and TGF-β2 by 91.8% (P < 0.01). The proliferation of primary epithelial cells stimulated by IL-17A or TGF-β2 was also inhibited by 124.1% and 69.9%, respectively. GHRH stimulated the growth of BPH-1 and primary prostate spheres. This study provides evidence that GHRH plays important roles in prostatic inflammation and EMT and suggests the merit of further investigation to elucidate the effects of GHRH antagonists in prostatitis and BPH.
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24
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Gan J, Ke X, Jiang J, Dong H, Yao Z, Lin Y, Lin W, Wu X, Yan S, Zhuang Y, Chu WK, Cai R, Zhang X, Cheung HS, Block NL, Pang CP, Schally AV, Zhang H. Growth hormone-releasing hormone receptor antagonists inhibit human gastric cancer through downregulation of PAK1-STAT3/NF-κB signaling. Proc Natl Acad Sci U S A 2016; 113:14745-14750. [PMID: 27930339 PMCID: PMC5187693 DOI: 10.1073/pnas.1618582114] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Gastric cancer (GC) ranks as the fourth most frequent in incidence and second in mortality among all cancers worldwide. The development of effective treatment approaches is an urgent requirement. Growth hormone-releasing hormone (GHRH) and GHRH receptor (GHRH-R) have been found to be present in a variety of tumoral tissues and cell lines. Therefore the inhibition of GHRH-R was proposed as a promising approach for the treatment of these cancers. However, little is known about GHRH-R and the relevant therapy in human GC. By survival analyses of multiple cohorts of GC patients, we identified that increased GHRH-R in tumor specimens correlates with poor survival and is an independent predictor of patient prognosis. We next showed that MIA-602, a highly potent GHRH-R antagonist, effectively inhibited GC growth in cultured cells. Further, this inhibitory effect was verified in multiple models of human GC cell lines xenografted into nude mice. Mechanistically, GHRH-R antagonists target GHRH-R and down-regulate the p21-activated kinase 1 (PAK1)-mediated signal transducer and activator of transcription 3 (STAT3)/nuclear factor-κB (NF-κB) inflammatory pathway. Overall, our studies establish GHRH-R as a potential molecular target in human GC and suggest treatment with GHRH-R antagonist as a promising therapeutic intervention for this cancer.
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Affiliation(s)
- Jinfeng Gan
- Cancer Research Center, Shantou University Medical College, Shantou 515041, China
| | - Xiurong Ke
- Cancer Research Center, Shantou University Medical College, Shantou 515041, China
| | - Jiali Jiang
- Cancer Research Center, Shantou University Medical College, Shantou 515041, China
| | - Hongmei Dong
- Cancer Research Center, Shantou University Medical College, Shantou 515041, China
| | - Zhimeng Yao
- Cancer Research Center, Shantou University Medical College, Shantou 515041, China
| | - Yusheng Lin
- Cancer Research Center, Shantou University Medical College, Shantou 515041, China
| | - Wan Lin
- Cancer Research Center, Shantou University Medical College, Shantou 515041, China
| | - Xiao Wu
- Tumor Tissue Bank, Affiliated Cancer Hospital of Shantou University Medical College, Shantou 515041, China
| | - Shumei Yan
- Department of Pathology, Sun Yat-sen University Cancer Center, Guangzhou 510060, China
| | - Yixuan Zhuang
- Tumor Tissue Bank, Affiliated Cancer Hospital of Shantou University Medical College, Shantou 515041, China
| | - Wai Kit Chu
- Department of Ophthalmology & Visual Sciences, The Chinese University of Hong Kong, Hong Kong, China
| | - Renzhi Cai
- Endocrine, Polypeptide, and Cancer Institute, Veterans Affairs Medical Center, Miami, FL 33125
- South Florida Veterans Affairs Foundation for Research and Education, Miami, FL 33125
- Division of Hematology and Oncology, Department of Medicine, Miller School of Medicine, University of Miami, Miami, FL 33136
- Division of Endocrinology, Department of Medicine, Miller School of Medicine, University of Miami, Miami, FL 33136
- Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, FL 33136
| | - Xianyang Zhang
- Endocrine, Polypeptide, and Cancer Institute, Veterans Affairs Medical Center, Miami, FL 33125
- South Florida Veterans Affairs Foundation for Research and Education, Miami, FL 33125
- Division of Hematology and Oncology, Department of Medicine, Miller School of Medicine, University of Miami, Miami, FL 33136
- Division of Endocrinology, Department of Medicine, Miller School of Medicine, University of Miami, Miami, FL 33136
- Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, FL 33136
| | - Herman S Cheung
- Endocrine, Polypeptide, and Cancer Institute, Veterans Affairs Medical Center, Miami, FL 33125
- South Florida Veterans Affairs Foundation for Research and Education, Miami, FL 33125
- Department of Biomedical Engineering, University of Miami, Coral Gables, FL 33146
| | - Norman L Block
- Department of Pathology, Miller School of Medicine, University of Miami, Miami, FL 33136
| | - Chi Pui Pang
- Department of Ophthalmology & Visual Sciences, The Chinese University of Hong Kong, Hong Kong, China
- Joint Shantou International Eye Center, Shantou University and The Chinese University of Hong Kong, Shantou 515041, China
| | - Andrew V Schally
- Endocrine, Polypeptide, and Cancer Institute, Veterans Affairs Medical Center, Miami, FL 33125;
- South Florida Veterans Affairs Foundation for Research and Education, Miami, FL 33125
- Division of Hematology and Oncology, Department of Medicine, Miller School of Medicine, University of Miami, Miami, FL 33136
- Division of Endocrinology, Department of Medicine, Miller School of Medicine, University of Miami, Miami, FL 33136
- Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, FL 33136
- Department of Pathology, Miller School of Medicine, University of Miami, Miami, FL 33136
| | - Hao Zhang
- Cancer Research Center, Shantou University Medical College, Shantou 515041, China;
- Tumor Tissue Bank, Affiliated Cancer Hospital of Shantou University Medical College, Shantou 515041, China
- Department of Biotherapy, Affiliated Cancer Hospital of Shantou University Medical College, Shantou 515041, China
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25
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Stewart DA, Winnike JH, McRitchie SL, Clark RF, Pathmasiri WW, Sumner SJ. Metabolomics Analysis of Hormone-Responsive and Triple-Negative Breast Cancer Cell Responses to Paclitaxel Identify Key Metabolic Differences. J Proteome Res 2016; 15:3225-40. [PMID: 27447733 DOI: 10.1021/acs.jproteome.6b00430] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
To date, no targeted therapies are available to treat triple negative breast cancer (TNBC), while other breast cancer subtypes are responsive to current therapeutic treatment. Metabolomics was conducted to reveal differences in two hormone receptor-negative TNBC cell lines and two hormone receptor-positive Luminal A cell lines. Studies were conducted in the presence and absence of paclitaxel (Taxol). TNBC cell lines had higher levels of amino acids, branched-chain amino acids, nucleotides, and nucleotide sugars and lower levels of proliferation-related metabolites like choline compared with Luminal A cell lines. In the presence of paclitaxel, each cell line showed unique metabolic responses, with some similarities by type. For example, in the Luminal A cell lines, levels of lactate and creatine decreased while certain choline metabolites and myo-inositol increased with paclitaxel. In the TNBC cell lines levels of glutamine, glutamate, and glutathione increased, whereas lysine, proline, and valine decreased in the presence of drug. Profiling secreted inflammatory cytokines in the conditioned media demonstrated a greater response to paclitaxel in the hormone-positive Luminal cells compared with a secretion profile that suggested greater drug resistance in the TNBC cells. The most significant differences distinguishing the cell types based on pathway enrichment analyses were related to amino acid, lipid and carbohydrate metabolism pathways, whereas several biological pathways were differentiated between the cell lines following treatment.
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Affiliation(s)
- Delisha A Stewart
- NIH Eastern Regional Comprehensive Metabolomics Resource Core, RTI International , Research Triangle Park, North Carolina 27709, United States
| | - Jason H Winnike
- David H. Murdock Research Institute , Kannapolis, North Carolina 28081, United States
| | - Susan L McRitchie
- NIH Eastern Regional Comprehensive Metabolomics Resource Core, RTI International , Research Triangle Park, North Carolina 27709, United States
| | - Robert F Clark
- NIH Eastern Regional Comprehensive Metabolomics Resource Core, RTI International , Research Triangle Park, North Carolina 27709, United States
| | - Wimal W Pathmasiri
- NIH Eastern Regional Comprehensive Metabolomics Resource Core, RTI International , Research Triangle Park, North Carolina 27709, United States
| | - Susan J Sumner
- NIH Eastern Regional Comprehensive Metabolomics Resource Core, RTI International , Research Triangle Park, North Carolina 27709, United States
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26
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Kanashiro-Takeuchi RM, Szalontay L, Schally AV, Takeuchi LM, Popovics P, Jaszberenyi M, Vidaurre I, Zarandi M, Cai RZ, Block NL, Hare JM, Rick FG. New therapeutic approach to heart failure due to myocardial infarction based on targeting growth hormone-releasing hormone receptor. Oncotarget 2016; 6:9728-39. [PMID: 25797248 PMCID: PMC4496393 DOI: 10.18632/oncotarget.3303] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Accepted: 02/08/2015] [Indexed: 12/21/2022] Open
Abstract
Background We previously showed that growth hormone-releasing hormone (GHRH) agonists are cardioprotective following myocardial infarction (MI). Here, our aim was to evaluate the in vitro and in vivo activities of highly potent new GHRH agonists, and elucidate their mechanisms of action in promoting cardiac repair. Methods and Results H9c2 cells were cultured in serum-free medium, mimicking nutritional deprivation. GHRH agonists decreased calcium influx and significantly improved cell survival. Rats with cardiac infarction were treated with GHRH agonists or placebo for four weeks. MI size was reduced by selected GHRH agonists (JI-38, MR-356, MR-409); this accompanied an increased number of cardiac c-kit+ cells, cellular mitotic divisions, and vascular density. One week post-MI, MR-409 significantly reduced plasma levels of IL-2, IL-6, IL-10 and TNF-α compared to placebo. Gene expression studies revealed favorable outcomes of MR-409 treatment partially result from inhibitory activity on pro-apoptotic molecules and pro-fibrotic systems, and by elevation of bone morphogenetic proteins. Conclusions Treatment with GHRH agonists appears to reduce the inflammatory responses post-MI and may consequently improve mechanisms of healing and cardiac remod eling by regulating pathways involved in fibrosis, apoptosis and cardiac repair. Patients with cardiac dysfunction could benefit from treatment with novel GHRH agonists.
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Affiliation(s)
- Rosemeire M Kanashiro-Takeuchi
- Interdisciplinary Stem Cell Institute, University of Miami, Miller School of Medicine, Miami, Florida, United States of America.,Department of Molecular and Cellular Pharmacology, University of Miami, Miller School of Medicine, Florida, United States of America
| | - Luca Szalontay
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education, Miami, Florida, United States of America
| | - Andrew V Schally
- Interdisciplinary Stem Cell Institute, University of Miami, Miller School of Medicine, Miami, Florida, United States of America.,Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education, Miami, Florida, United States of America.,Department of Pathology, University of Miami, Miller School of Medicine, Miami, Florida, United States of America.,Department of Medicine, Divisions of Hematology/Oncology and Endocrinology, University of Miami, Miller School of Medicine, Miami, Florida, United States of America.,Sylvester Comprehensive Cancer Center, University of Miami, Miller School of Medicine, Miami, Florida, United States of America
| | - Lauro M Takeuchi
- Interdisciplinary Stem Cell Institute, University of Miami, Miller School of Medicine, Miami, Florida, United States of America
| | - Petra Popovics
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education, Miami, Florida, United States of America.,Department of Medicine III, Medical Faculty Carl Gustav Carus, TU Dresden, Germany.,Department of Medicine, Division of Cardiology, University of Miami, Miller School of Medicine, Miami, Florida, United States of America
| | - Miklos Jaszberenyi
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education, Miami, Florida, United States of America.,Department of Pathology, University of Miami, Miller School of Medicine, Miami, Florida, United States of America
| | - Irving Vidaurre
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education, Miami, Florida, United States of America
| | - Marta Zarandi
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education, Miami, Florida, United States of America
| | - Ren-Zhi Cai
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education, Miami, Florida, United States of America.,Department of Pathology, University of Miami, Miller School of Medicine, Miami, Florida, United States of America
| | - Norman L Block
- Interdisciplinary Stem Cell Institute, University of Miami, Miller School of Medicine, Miami, Florida, United States of America.,Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education, Miami, Florida, United States of America.,Department of Pathology, University of Miami, Miller School of Medicine, Miami, Florida, United States of America.,Department of Medicine, Divisions of Hematology/Oncology and Endocrinology, University of Miami, Miller School of Medicine, Miami, Florida, United States of America.,Sylvester Comprehensive Cancer Center, University of Miami, Miller School of Medicine, Miami, Florida, United States of America
| | - Joshua M Hare
- Interdisciplinary Stem Cell Institute, University of Miami, Miller School of Medicine, Miami, Florida, United States of America.,Department of Medicine, Division of Cardiology, University of Miami, Miller School of Medicine, Miami, Florida, United States of America
| | - Ferenc G Rick
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education, Miami, Florida, United States of America.,Department of Urology, Herbert Wertheim College of Medicine, Florida International University, Miami, Florida, United States of America
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27
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Matsumoto H, Thike AA, Li H, Yeong J, Koo SL, Dent RA, Tan PH, Iqbal J. Increased CD4 and CD8-positive T cell infiltrate signifies good prognosis in a subset of triple-negative breast cancer. Breast Cancer Res Treat 2016; 156:237-47. [PMID: 26960711 DOI: 10.1007/s10549-016-3743-x] [Citation(s) in RCA: 104] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Accepted: 03/02/2016] [Indexed: 10/22/2022]
Abstract
Tumour-infiltrating lymphocytes (TILs) signify immune response to tumour in a variety of cancers including breast cancer. However, earlier studies examining the clinical significance of TILs in breast cancers have generated mixed results. There are only a few that address the relationship between TILs and clinical outcomes in triple-negative breast cancers (TNBC). The aim of this study is to evaluate the clinical significance of TILs that express CD4 + and CD8 + , in TNBC. Immunohistochemical staining of CD4 and CD8 was performed on tissue microarrays of 164 cases of TNBC. TILs were counted separately as intratumoral when within the cancer cell nests (iTILs) and as stromal when within cancer stroma (sTILs). High CD8 + iTILs and sTILs, and CD4 + iTILs correlated with histologic grade. On Kaplan-Meier analysis, a significantly better survival rate was observed in high CD8 + iTIL (disease-free survival, DFS: P = 0.004, overall survival, OS: P = 0.02) and both high CD4 + iTILs (DFS: P = 0.025, OS: P = 0.023) and sTILs (DFS: P = 0.01, OS: P = 0.002). In multivariate analysis, CD8 + iTILs (DFS: P = 0.0095), CD4 + sTILs (DFS: P = 0.0084; OS: P = 0.0118), and CD4 (high) CD8 (high) CD8 iTILs (DFS: P = 0.0121; OS: P = 0.0329) and sTILs (DFS: P = 0.0295) showed significantly better survival outcomes. These results suggest that high levels of both CD8 + iTILs and CD4 + sTILs as well as CD4 (high) CD8 (high) iTILs and sTILs are independent prognostic factors in TNBC.
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Affiliation(s)
| | - Aye Aye Thike
- Department of Pathology, Singapore General Hospital, 20 College Road, Academia, Level 10, Singapore, 169856, Singapore
| | - Huihua Li
- Division of Research, Singapore General Hospital, Singapore, Singapore
| | - Joe Yeong
- Department of Pathology, Singapore General Hospital, 20 College Road, Academia, Level 10, Singapore, 169856, Singapore.,Singapore Immunology Network, Agency of Science, Technology and Research, Singapore, Singapore
| | - Si-Lin Koo
- Department of Medical Oncology, National Cancer Centre, Singapore, Singapore
| | | | - Puay Hoon Tan
- Department of Pathology, Singapore General Hospital, 20 College Road, Academia, Level 10, Singapore, 169856, Singapore
| | - Jabed Iqbal
- Department of Pathology, Singapore General Hospital, 20 College Road, Academia, Level 10, Singapore, 169856, Singapore.
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28
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29
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Schally AV, Perez R, Block NL, Rick FG. Potentiating effects of GHRH analogs on the response to chemotherapy. Cell Cycle 2015; 14:699-704. [PMID: 25648497 DOI: 10.1080/15384101.2015.1010893] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Growth hormone releasing hormone (GHRH) from hypothalamus nominatively stimulates growth hormone release from adenohypophysis. GHRH is also produced by cancers, acting as an autocrine/paracrine growth factor. This growth factor function is seen in lymphoma, melanoma, colorectal, liver, lung, breast, prostate, kidney, bladder cancers. Pituitary type GHRH receptors and their splice variants are also expressed in these malignancies. Synthetic antagonists of the GHRH receptor inhibit proliferation of cancers. Besides direct inhibitory effects on tumors, GHRH antagonists also enhance cytotoxic chemotherapy. GHRH antagonists potentiate docetaxel effects on growth of H460 non-small cell lung cancer (NSCLC) and MX-1 breast cancer plus suppressive action of doxorubicin on MX-1 and HCC1806 breast cancer. We investigated mechanisms of antagonists on tumor growth, inflammatory signaling, doxorubicin response, expression of drug resistance genes, and efflux pump function. Triple negative breast cancer cell xenografted into nude mice were treated with GHRH antagonist, doxorubicin, or their combination. The combination reduced tumor growth, inflammatory gene expression, drug-resistance gene expression, cancer stem-cell marker expression, and efflux-pump function. Thus, antagonists increased the efficacy of doxorubicin in HCC1806 and MX-1 tumors. Growth inhibition of H460 NSCLC by GHRH antagonists induced marked downregulation in expression of prosurvival proteins K-Ras, COX-2, and pAKT. In HT-29, HCT-116 and HCT-15 colorectal cancer lines, GHRH antagonist treatment caused cellular arrest in S-phase of cell cycle, potentiated inhibition of in vitro proliferation and in vivo growth produced by S-phase specific cytotoxic agents, 5-FU, irinotecan and cisplatin. This enhancement of cytotoxic therapy by GHRH antagonists should have clinical applications.
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Affiliation(s)
- Andrew V Schally
- a Veterans Affairs Medical Center and South Florida VA Foundation for Research and Education ; Miami , FL USA
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30
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Schally AV, Block NL, Rick FG. New therapies for relapsed castration-resistant prostate cancer based on peptide analogs of hypothalamic hormones. Asian J Androl 2015; 17:925-8. [PMID: 26112478 PMCID: PMC4814950 DOI: 10.4103/1008-682x.152819] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
It is a pleasure to contribute our presentation at the International Prostate Forum of the Annual Meeting of the American Urological Association (AUA) to this special issue of the Asian Journal of Andrology.
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Affiliation(s)
- Andrew V Schally
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education, Miami, FL 33125, USA
- Department of Pathology, University of Miami Miller School of Medicine, Miami, FL 33136, USA
- Department of Medicine, Division of Hematology/Oncology, University of Miami Miller School of Medicine, Miami, FL 33136, USA
- Department of Medicine, Division of Endocrinology, University of Miami Miller School of Medicine, Miami, FL 33136, USA
- Department of Medicine, Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Norman L Block
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education, Miami, FL 33125, USA
- Department of Pathology, University of Miami Miller School of Medicine, Miami, FL 33136, USA
- Department of Medicine, Division of Hematology/Oncology, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Ferenc G Rick
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education, Miami, FL 33125, USA
- Department of Urology, Herbert Wertheim College of Medicine, Florida International University, Miami, FL, 33174, USA
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31
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Schally AV. Endocrine approaches to treatment of Alzheimer's disease and other neurological conditions: Part I: Some recollections of my association with Dr. Abba Kastin: A tale of successful collaboration. Peptides 2015; 72:154-63. [PMID: 25843023 DOI: 10.1016/j.peptides.2015.03.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Accepted: 03/12/2015] [Indexed: 01/24/2023]
Affiliation(s)
- Andrew V Schally
- Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center, Miami, FL, United States; South Florida VA Foundation for Research and Education, Miami, FL, United States; Department of Pathology, University of Miami, Miller School of Medicine, Miami, FL, United States; Division of Hematology/Oncology, Department of Medicine, University of Miami, Miller School of Medicine, Miami, FL, United States; Division of Endocrinology, Department of Medicine, University of Miami, Miller School of Medicine, Miami, FL, United States.
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32
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Deregulation of the EGFR/PI3K/PTEN/Akt/mTORC1 pathway in breast cancer: possibilities for therapeutic intervention. Oncotarget 2015; 5:4603-50. [PMID: 25051360 PMCID: PMC4148087 DOI: 10.18632/oncotarget.2209] [Citation(s) in RCA: 179] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
The EGFR/PI3K/PTEN/Akt/mTORC1/GSK-3 pathway plays prominent roles in malignant transformation, prevention of apoptosis, drug resistance and metastasis. The expression of this pathway is frequently altered in breast cancer due to mutations at or aberrant expression of: HER2, ERalpha, BRCA1, BRCA2, EGFR1, PIK3CA, PTEN, TP53, RB as well as other oncogenes and tumor suppressor genes. In some breast cancer cases, mutations at certain components of this pathway (e.g., PIK3CA) are associated with a better prognosis than breast cancers lacking these mutations. The expression of this pathway and upstream HER2 has been associated with breast cancer initiating cells (CICs) and in some cases resistance to treatment. The anti-diabetes drug metformin can suppress the growth of breast CICs and herceptin-resistant HER2+ cells. This review will discuss the importance of the EGFR/PI3K/PTEN/Akt/mTORC1/GSK-3 pathway primarily in breast cancer but will also include relevant examples from other cancer types. The targeting of this pathway will be discussed as well as clinical trials with novel small molecule inhibitors. The targeting of the hormone receptor, HER2 and EGFR1 in breast cancer will be reviewed in association with suppression of the EGFR/PI3K/PTEN/Akt/mTORC1/GSK-3 pathway.
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33
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Sui X, Wang X, Han W, Li D, Xu Y, Lou F, Zhou J, Gu X, Zhu J, Zhang C, Pan H. MicroRNAs-mediated cell fate in triple negative breast cancers. Cancer Lett 2015; 361:8-12. [PMID: 25748387 DOI: 10.1016/j.canlet.2015.02.048] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Revised: 02/26/2015] [Accepted: 02/26/2015] [Indexed: 12/19/2022]
Abstract
MicroRNAs (miRNAs) are small non-coding RNAs that function as major modulators of posttranscriptional protein-coding gene expression in diverse biological processes including cell survival, cell cycle arrest, senescence, autophagy, and differentiation. The control of miRNAs plays an important role in cancer initiation and metastasis. Triple negative breast cancer (TNBC) is a distinct breast cancer subtype, which is defined by the absence of estrogen receptor (ER), progesterone receptor (PR) and epidermal growth factor receptor 2 (HER2/neu). Due to its high recurrence rate and poor prognosis, TNBC represents a challenge for breast cancer therapy. In recent years, a large number of microRNAs have been identified to play a crucial role in TNBC and some of them were found to be correlated with worse prognosis of TNBC. Thus, understanding the novel function of miRNAs may allow us to develop promising therapeutic targets for the treatment of TNBC patients.
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Affiliation(s)
- Xinbing Sui
- Department of Medical Oncology, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, China; Biomedical Research Center and Key Laboratory of Biotherapy of Zhejiang Province, Hangzhou, China
| | - Xian Wang
- Department of Medical Oncology, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, China; Biomedical Research Center and Key Laboratory of Biotherapy of Zhejiang Province, Hangzhou, China
| | - Weidong Han
- Department of Medical Oncology, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, China; Biomedical Research Center and Key Laboratory of Biotherapy of Zhejiang Province, Hangzhou, China
| | - Da Li
- Department of Medical Oncology, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, China; Biomedical Research Center and Key Laboratory of Biotherapy of Zhejiang Province, Hangzhou, China
| | - Yinghua Xu
- Department of Medical Oncology, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, China
| | - Fang Lou
- Department of Medical Oncology, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, China
| | - Jichun Zhou
- Department of Surgical Oncology, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, China
| | - Xidong Gu
- Department of Breast Surgery, The First affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China
| | - Jing Zhu
- Department of Colorectal Surgery, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, China
| | - Cheng Zhang
- Zhejiang Provincial Key Laboratory of Pathophysiology, School of Medicine, Ningbo University, Ningbo, China
| | - Hongming Pan
- Department of Medical Oncology, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou, China; Biomedical Research Center and Key Laboratory of Biotherapy of Zhejiang Province, Hangzhou, China.
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34
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Antagonist of GH-releasing hormone receptors alleviates experimental ocular inflammation. Proc Natl Acad Sci U S A 2014; 111:18303-8. [PMID: 25489106 DOI: 10.1073/pnas.1421815112] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Disruptions in immunity and occurrence of inflammation cause many eye diseases. The growth hormone-releasing hormone-growth hormone-insulin-like growth factor-1 (GHRH-GH-IGF1) axis exerts regulatory effects on the immune system. Its involvement in ocular inflammation remains to be investigated. Here we studied this signaling in endotoxin-induced uveitis (EIU) generated by LPS. The increase in GHRH receptor (GHRH-R) protein levels was parallel to the increase in mRNA levels of pituitary-specific transcription factor-1, GHRH-R splice variant 1, GHRH, and GH following LPS insult. Elevation of GHRH-R and GH receptor was localized on the epithelium of the iris and ciliary body, and GHRH-R was confined to the infiltrating macrophages and leukocytes in aqueous humor but not to those in stroma. Treatment with GHRH-R antagonist decreased LPS-stimulated surges of GH and IGF1 in aqueous humor and alleviated inflammation by reducing the infiltration of macrophages and leukocytes and the production of TNF-α, IL-1β, and monocyte chemotactic protein-1. Our results indicate that inflammation in the iris and ciliary body involves the activation of GHRH signaling, which affects the recruitment of immune cells and the production of proinflammatory mediators that contribute to EIU pathogenesis. Moreover, the results suggest that GHRH-R antagonists are potential therapeutic agents for the treatment of acute ocular inflammation.
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35
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Antagonistic analogs of growth hormone-releasing hormone increase the efficacy of treatment of triple negative breast cancer in nude mice with doxorubicin; A preclinical study. Oncoscience 2014; 1:665-73. [PMID: 25593995 PMCID: PMC4278278 DOI: 10.18632/oncoscience.92] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2014] [Accepted: 10/23/2014] [Indexed: 12/11/2022] Open
Abstract
Introduction This study evaluated the effects of an antagonistic analog of growth hormone-releasing hormone, MIA-602, on tumor growth, response to doxorubicin, expression of drug resistance genes, and efflux pump function in human triple negative breast cancers. Methods HCC1806 (doxorubicin-sensitive) and MX-1 (doxorubicin-resistant), cell lines were xenografted into nude mice and treated with MIA-602, doxorubicin, or their combination. Tumors were evaluated for changes in volume and the expression of the drug resistance genes MDR1 and NANOG. In-vitro cell culture assays were used to analyze the effect of MIA-602 on efflux pump function. Results Therapy with MIA-602 significantly reduced tumor growth and enhanced the efficacy of doxorubicin in both cell lines. Control HCC1806 tumors grew by 435%, while the volume of tumors treated with MIA-602 enlarged by 172.2% and with doxorubicin by 201.6%. Treatment with the combination of MIA-602 and doxorubicin resulted in an increase in volume of only 76.2%. Control MX-1 tumors grew by 907%, while tumors treated with MIA-602 enlarged by 434.8% and with doxorubicin by 815%. The combination of MIA-602 and doxorubicin reduced the increase in tumor volume to 256%. Treatment with MIA-602 lowered the level of growth hormone-releasing hormone and growth hormone-releasing hormone receptors and significantly reduced the expression of multidrug resistance (MDR1) gene and the drug resistance regulator NANOG. MIA-602 also suppressed efflux pump function in both cell lines. Conclusions We conclude that treatment of triple negative breast cancers with growth hormone-releasing hormone antagonists reduces tumor growth and potentiates the effects of cytotoxic therapy by nullifying drug resistance.
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McCubrey JA, Davis NM, Abrams SL, Montalto G, Cervello M, Libra M, Nicoletti F, D'Assoro AB, Cocco L, Martelli AM, Steelman LS. Targeting breast cancer initiating cells: advances in breast cancer research and therapy. Adv Biol Regul 2014; 56:81-107. [PMID: 24913694 DOI: 10.1016/j.jbior.2014.05.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Accepted: 05/06/2014] [Indexed: 06/03/2023]
Abstract
Over the past 10 years there have been significant advances in our understanding of breast cancer and the important roles that breast cancer initiating cells (CICs) play in the development and resistance of breast cancer. Breast CICs endowed with self-renewing and tumor-initiating capacities are believed to be responsible for the relapses which often occur after various breast cancer therapies. In this review, we will summarize some of the key developments in breast CICs which will include discussion of some of the key genes implicated: estrogen receptor (ER), HER2, BRCA1, TP53, PIK3CA, RB, P16INK1 and various miRs as well some drugs which are showing promise in targeting CICs. In addition, the concept of combined therapies will be discussed. Basic and clinical research is resulting in novel approaches to improve breast cancer therapy by targeting the breast CICs.
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Affiliation(s)
- James A McCubrey
- Department of Microbiology and Immunology, Brody School of Medicine at East Carolina University, Brody Building 5N98C, Greenville, NC 27858, USA.
| | - Nicole M Davis
- Department of Microbiology and Immunology, Brody School of Medicine at East Carolina University, Brody Building 5N98C, Greenville, NC 27858, USA
| | - Stephen L Abrams
- Department of Microbiology and Immunology, Brody School of Medicine at East Carolina University, Brody Building 5N98C, Greenville, NC 27858, USA
| | - Giuseppe Montalto
- Biomedical Department of Internal Medicine and Specialties, University of Palermo, Palermo, Italy; Consiglio Nazionale delle Ricerche, Istituto di Biomedicina e Immunologia Molecolare "Alberto Monroy", Palermo, Italy
| | - Melchiorre Cervello
- Consiglio Nazionale delle Ricerche, Istituto di Biomedicina e Immunologia Molecolare "Alberto Monroy", Palermo, Italy
| | - Massimo Libra
- Department of Bio-Medical Sciences, University of Catania, Catania, Italy
| | | | - Antonino B D'Assoro
- Department of Medical Oncology, Mayo Clinic Cancer Center, Rochester, MN, USA
| | - Lucio Cocco
- Dipartimento di Scienze Biomediche e Neuromotorie, Università di Bologna, Bologna, Italy
| | - Alberto M Martelli
- Dipartimento di Scienze Biomediche e Neuromotorie, Università di Bologna, Bologna, Italy
| | - Linda S Steelman
- Department of Microbiology and Immunology, Brody School of Medicine at East Carolina University, Brody Building 5N98C, Greenville, NC 27858, USA
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Szalontay L, Schally AV, Popovics P, Vidaurre I, Krishan A, Zarandi M, Cai RZ, Klukovits A, Block NL, Rick FG. Novel GHRH antagonists suppress the growth of human malignant melanoma by restoring nuclear p27 function. Cell Cycle 2014; 13:2790-7. [PMID: 25486366 PMCID: PMC4615138 DOI: 10.4161/15384101.2015.945879] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Revised: 06/13/2014] [Accepted: 06/16/2014] [Indexed: 01/21/2023] Open
Abstract
Malignant melanoma is the deadliest form of skin cancer; the treatment of advanced and recurrent forms remains a challenge. It has recently been reported that growth hormone-releasing hormone (GHRH) receptor is involved in the pathogenesis of melanoma. Therefore, we investigated the effects of our new GHRH antagonists on a human melanoma cancer cell line. Antiproliferative effects of GHRH antagonists, MIA-602, MIA-606 and MIA-690, on the human melanoma cell line, A-375, were studied in vitro using the MTS assay. The effect of MIA-690 (5 μg/day 28 d) was further evaluated in vivo in nude mice bearing xenografts of A-375. Subcellular localization of p27 was detected with Western blot and immunofluorescent staining. MIA-690 inhibited the proliferation of A-375 cells in a dose-dependent manner (33% at 10 μM, and 19.2% at 5 μM, P < 0 .05 vs. control), and suppressed the growth of xenografted tumors by 70.45% (P < 0.05). Flow cytometric analysis of cell cycle effects following the administration of MIA-690 revealed a decrease in the number of cells in G2/M phase (from 19.7% to 12.9%, P < 0.001). Additionally, Western blot and immunofluorescent studies showed that exposure of A-375 cells to MIA-690 triggered the nuclear accumulation of p27. MIA-690 inhibited tumor growth in vitro and in vivo, and increased the translocation of p27 into the nucleus thus inhibiting progression of the cell cycle. Our findings indicate that patients with malignant melanoma could benefit from treatment regimens, which combine existing chemotherapy agents and novel GHRH-antagonists.
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Key Words
- ANOVA, one-way analysis of variance
- Abu, a-aminobutyric acid
- Ac, acetyl
- Ada, 12-aminododecanoyl
- Agm, agmatine
- Amc, 8-aminocaprylyl
- Cpa, parachlorophenylalanine
- FBS, fetal bovine serum
- Fpa5, pentafluoro-phenylalanine
- GH, growth hormone
- GHRH, growth hormone-releasing hormone
- GHRH-R, growth hormone-releasing hormone receptor
- Har, homoarginine
- IGF-I, insulin-like growth factor I
- MTS, 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfonphenyl)-2H-tetrazolium
- Nle, norleucine
- Orn, ornithine
- Ph, phenyl
- PhAc, phenylacetyl
- SVs, splice variants
- TBS, tris-buffered saline
- Tyr(Me), O-methyltyrosine
- growth hormone-releasing hormone antagonist
- hGHRH, human growth hormone-releasing hormone
- mTOR, mammalian target of rapamycin
- melanoma
- p27
- pGHRH-R, pituitary type GHRH-receptor
- targeted therapy
- xenografted mouse model
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Affiliation(s)
- Luca Szalontay
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education; Miami, FL USA
| | - Andrew V Schally
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education; Miami, FL USA
- Department of Pathology; University of Miami; Miller School of Medicine; Miami, FL USA
- Divisions of Hematology/Oncology; University of Miami; Miller School of Medicine; Miami, FL USA
- Department of Endocrinology; University of Miami; Miller School of Medicine; Miami, FL USA
- Sylvester Comprehensive Cancer Center; University of Miami; Miller School of Medicine; Miami, FL USA
| | - Petra Popovics
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education; Miami, FL USA
- Cardiovascular Diseases; Department of Medicine; University of Miami; Miller School of Medicine; Miami, FL USA
| | - Irving Vidaurre
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education; Miami, FL USA
| | - Awtar Krishan
- Department of Pathology; University of Miami; Miller School of Medicine; Miami, FL USA
| | - Marta Zarandi
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education; Miami, FL USA
- Department of Pathology; University of Miami; Miller School of Medicine; Miami, FL USA
| | - Ren-Zhi Cai
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education; Miami, FL USA
- Department of Pathology; University of Miami; Miller School of Medicine; Miami, FL USA
| | - Anna Klukovits
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education; Miami, FL USA
- Department of Pathology; University of Miami; Miller School of Medicine; Miami, FL USA
| | - Norman L Block
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education; Miami, FL USA
- Department of Pathology; University of Miami; Miller School of Medicine; Miami, FL USA
- Divisions of Hematology/Oncology; University of Miami; Miller School of Medicine; Miami, FL USA
| | - Ferenc G Rick
- Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education; Miami, FL USA
- Department of Urology; Herbert Wertheim College of Medicine; Florida International University; Miami, FL, USA
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Jaszberenyi M, Rick FG, Szalontay L, Block NL, Zarandi M, Cai RZ, Schally AV. Beneficial effects of novel antagonists of GHRH in different models of Alzheimer's disease. Aging (Albany NY) 2013; 4:755-67. [PMID: 23211425 PMCID: PMC3560443 DOI: 10.18632/aging.100504] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Alzheimer's disease is the most frequent debilitating disorder of the central nervous system. Neuroendocrine mechanisms appear to play an important role in this insidiously developing disease. In the present study, the effects of a recently developed growth hormone-releasing hormone (GHRH) antagonist (MIA-690) were evaluated in vivo observing the behavior of genetically modified "Alzheimer's" 5XFAD mice in a Morris water maze (MWM). The effects of the antagonist were also evaluated in vitro using HCN2 human cortical cell cultures treated with amyloid-β1-42. In vivo, the indices of cognitive performance (latency, cumulative index etc.) were followed up for 6 months. In vitro, the formation of reactive oxygen species, markers of inflammatory and neurohormonal signaling were measured by fluorescent detection, PCR, and ELISA. Accumulation of amyloid-β1-42 rafts and τ filaments in necropsied brain samples was verified with the help of ELISA. In the MWM experiments, MIA-690 decreased escape latency, and, in the brain samples, it inhibited the concentration of amyloid-β1-42 and τ filaments. In cell cultures, the GHRH analog showed anti-oxidative and neuro-protective properties and inhibited the GHRH-growth hormone-insulin like growth factor axis. Our data strongly suggest the merit of further studies with GHRH analogs in models of Alzheimer's disease and in elementary clinical trials.
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Affiliation(s)
- Miklos Jaszberenyi
- Endocrine, Polypeptide, and Cancer Institute, Miami Veterans Affairs Medical Center and South Florida VA Foundation for Research and Education, Miami, FL 33125, USA
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Jaszberenyi M, Schally AV, Block NL, Zarandi M, Cai RZ, Vidaurre I, Szalontay L, Jayakumar AR, Rick FG. Suppression of the proliferation of human U-87 MG glioblastoma cells by new antagonists of growth hormone-releasing hormone in vivo and in vitro. Target Oncol 2013; 8:281-90. [PMID: 23371031 DOI: 10.1007/s11523-013-0264-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2012] [Accepted: 01/21/2013] [Indexed: 02/06/2023]
Abstract
Five-year survival of patients afflicted with glioblastoma multiforme (GBM) is rare, making this cancer one of the most feared malignancies. Previously, we reported that growth hormone-releasing hormone (GHRH) is a potent growth factor in cancers. The present work evaluated the effects of two antagonistic analogs of GHRH (MIA-604 and MIA-690) on the proliferation of U-87 MG GBM tumors, in vivo as well as in vitro. Both analogs were administered subcutaneously and dose-dependently inhibited the growth of tumors transplanted into nude mice (127 animals in seven groups). The analogs also inhibited cell proliferation in vitro, decreased cell size, and promoted apoptotic and autophagic processes. Both antagonists stimulated contact inhibition, as indicated by the expression of the E-cadherin-β-catenin complex and integrins, and decreased the release of humoral regulators of glial growth such as FGF, PDGFβ, and TGFβ, as revealed by genomic or proteomic detection methods. The GHRH analogs downregulated other tumor markers (Jun-proto-oncogene, mitogen-activated protein kinase-1, and melanoma cell adhesion molecule), upregulated tumor suppressors (p53, metastasis suppressor-1, nexin, TNF receptor 1A, BCL-2-associated agonist of cell death, and ifκBα), and inhibited the expression of the regulators of angiogenesis and invasion (angiopoetin-1, VEGF, matrix metallopeptidase-1, S100 calcium binding protein A4, and synuclein-γ). Our findings indicate that GHRH antagonists inhibit growth of GBMs by multiple mechanisms and decrease both tumor cell size and number.
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Leontieva OV, Paszkiewicz GM, Blagosklonny MV. Mechanistic or mammalian target of rapamycin (mTOR) may determine robustness in young male mice at the cost of accelerated aging. Aging (Albany NY) 2012; 4:899-916. [PMID: 23443503 PMCID: PMC3615157 DOI: 10.18632/aging.100528] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2012] [Accepted: 12/20/2012] [Indexed: 01/01/2023]
Abstract
Males, who are bigger and stronger than females, live shorter in most species from flies to mammals including humans. Cellular mass growth is driven in part by mTOR (Target of Rapamycin). When developmental growth is completed, then, instead of growth, mTOR drives aging, manifested by increased cellular functions, such as hyper-secretion by fibroblasts, thus altering homeostasis, leading to age-related diseases and death. We hypothesize that MTOR activity is elevated in male mice compared with females. Noteworthy, 6 months old males were 28 % heavier than females. Also levels of phosphorylated S6 (pS6) and phospho-AKT (p-AKT, Ser 473), markers of the mTOR activity, were higher in male organs tested. Levels of pS6 were highly variable among mice and correlated with body weight and p-AKT. With age, the difference between levels of pS6 between sexes tended to minimize, albeit males still had hyperactive mTOR. Unlike fasting, the intraperitoneal (i.p.) administration of rapamycin eliminated pS6 in all organs of all females measured by immunoblotting and immunohistochemistry without affecting p-AKT and blood insulin. Although i.p. rapamycin dramatically decreased levels of pS6 in males too, it was still detectable by immunoblotting upon longer exposure. Our study demonstrated that both tissue p-AKT and pS6 were higher in young male mice and were associated with increased body weight and insulin. These data can explain bigger body size and faster aging in males. Our data suggest higher efficacy of rapamycin compared to fasting. Higher sensitivity of females to rapamycin may explain more pronounced life extension by rapamycin observed in females compared to males in several studies.
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Affiliation(s)
- Olga V Leontieva
- Department of Cell Stress Biology, Roswell Park Cancer Institute, BLSC, L3-312, Elm and Carlton Streets, Buffalo, NY 14263, USA
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Rick FG, Seitz S, Schally AV, Szalontay L, Krishan A, Datz C, Stadlmayr A, Buchholz S, Block NL, Hohla F. GHRH antagonist when combined with cytotoxic agents induces S-phase arrest and additive growth inhibition of human colon cancer. Cell Cycle 2012; 11:4203-10. [PMID: 23095641 DOI: 10.4161/cc.22498] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Treatment of colon cancer with an antagonist of growth hormone-releasing hormone (GHRH), JMR-132, results in a cell cycle arrest in S-phase of the tumor cells. Thus, we investigated the effect of JMR-132 in combination with S-phase-specific cytotoxic agents, 5-FU, irinotecan and cisplatin on the in vitro and in vivo growth of HT-29, HCT-116 and HCT-15 human colon cancer cell lines. In vitro, every compound inhibited proliferation of HCT-116 cells in a dose-dependent manner. Treatment with JMR-132 (5 μM) combined with 5-FU (1.25 μM), irinotecan (1.25 μM) or cisplatin (1.25 μM) resulted in an additive growth inhibition of HCT-116 cells in vitro as shown by MTS assay. Cell cycle analyses revealed that treatment of HCT-116 cells with JMR-132 was accompanied by a cell cycle arrest in S-phase. Combination treatment using JMR-132 plus a cytotoxic drug led to a significant increase of the sub-G 1 fraction, suggesting apoptosis. In vivo, daily treatment with GHRH antagonist JMR-132 decreased the tumor volume by 40-55% (p < 0.001) of HT-29, HCT-116 and HCT-15 tumors xenografted into athymic nude mice. Combined treatment with JMR-132 plus chemotherapeutic agents 5-FU, irinotecan or cisplatin resulted in an additive tumor growth suppression of HT-29, HCT-116 and HCT-15 xenografts to 56-85%. Our observations indicate that JMR-132 enhances the antiproliferative effect of S-phase-specific cytotoxic drugs by causing accumulation of tumor cells in S-phase.
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Affiliation(s)
- Ferenc G Rick
- Endocrine, Polypeptide and Cancer Institute, Veterans Affairs Medical Center and South Florida Veterans Affairs Foundation for Research and Education, Miami, FL, USA
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