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Zhang J, Liu J, Yue Y, Wang L, He Q, Xu S, Li J, Liao Y, Chen Y, Wang S, Xie Y, Zhang B, Bian Y, Dimitrov DS, Yuan Y, Zhu J. The immunotoxin targeting PRLR increases tamoxifen sensitivity and enhances the efficacy of chemotherapy in breast cancer. J Exp Clin Cancer Res 2024; 43:173. [PMID: 38898487 PMCID: PMC11188579 DOI: 10.1186/s13046-024-03099-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Accepted: 06/10/2024] [Indexed: 06/21/2024] Open
Abstract
BACKGROUND Though tamoxifen achieves success in treating estrogen receptor α (ERα)-positive breast cancer, the followed development of tamoxifen resistance is a common challenge in clinic. Signals downstream of prolactin receptor (PRLR) could synergize with ERα in breast cancer progression. However, the potential effect of targeting PRL-PRLR axis combined with tamoxifen has not been thoroughly investigated. METHODS High-throughput RNA-seq data obtained from TCGA, Metabric and GEO datasets were analyzed to explore PRLR expression in breast cancer cell and the association of PRLR expression with tamoxifen treatment. Exogenous or PRL overexpression cell models were employed to investigate the role of activated PRLR pathway in mediating tamoxifen insensitivity. Immunotoxin targeting PRLR (N8-PE24) was constructed with splicing-intein technique, and the efficacy of N8-PE24 against breast cancer was evaluated using in vitro and in vivo methods, including analysis of cells growth or apoptosis, 3D spheroids culture, and animal xenografts. RESULTS PRLR pathway activated by PRL could significantly decrease sensitivity of ERα-positive breast cancer cells to tamoxifen. Tamoxifen treatment upregulated transcription of PRLR and could induce significant accumulation of PRLR protein in breast cancer cells by alkalizing lysosomes. Meanwhile, tamoxifen-resistant MCF7 achieved by long-term tamoxifen pressure exhibited both upregulated transcription and protein level of PRLR. Immunotoxin N8-PE24 enhanced sensitivity of breast cancer cells to tamoxifen both in vitro and in vivo. In xenograft models, N8-PE24 significantly enhanced the efficacy of tamoxifen and paclitaxel when treating PRLR-positive triple-negative breast cancer. CONCLUSIONS PRL-PRLR axis potentially associates with tamoxifen insensitivity in ERα-positive breast cancer cells. N8-PE24 could inhibit cell growth of the breast cancers and promote drug sensitivity of PRLR-positive breast cancer cells to tamoxifen and paclitaxel. Our study provides a new perspective for targeting PRLR to treat breast cancer.
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Affiliation(s)
- Jiawei Zhang
- Engineering Research Center of Cell & Therapeutic Antibody, MOE, School of Pharmacy, Shanghai Jiao Tong University, Building 6, Room 208, 800 Dongchuan road, Shanghai, 200240, China
| | - Junjun Liu
- Engineering Research Center of Cell & Therapeutic Antibody, MOE, School of Pharmacy, Shanghai Jiao Tong University, Building 6, Room 208, 800 Dongchuan road, Shanghai, 200240, China
| | - Yali Yue
- Engineering Research Center of Cell & Therapeutic Antibody, MOE, School of Pharmacy, Shanghai Jiao Tong University, Building 6, Room 208, 800 Dongchuan road, Shanghai, 200240, China
| | - Lei Wang
- Engineering Research Center of Cell & Therapeutic Antibody, MOE, School of Pharmacy, Shanghai Jiao Tong University, Building 6, Room 208, 800 Dongchuan road, Shanghai, 200240, China
| | - Qunye He
- Engineering Research Center of Cell & Therapeutic Antibody, MOE, School of Pharmacy, Shanghai Jiao Tong University, Building 6, Room 208, 800 Dongchuan road, Shanghai, 200240, China
| | - Shuyi Xu
- Engineering Research Center of Cell & Therapeutic Antibody, MOE, School of Pharmacy, Shanghai Jiao Tong University, Building 6, Room 208, 800 Dongchuan road, Shanghai, 200240, China
| | - Junyan Li
- Engineering Research Center of Cell & Therapeutic Antibody, MOE, School of Pharmacy, Shanghai Jiao Tong University, Building 6, Room 208, 800 Dongchuan road, Shanghai, 200240, China
| | - Yunji Liao
- Engineering Research Center of Cell & Therapeutic Antibody, MOE, School of Pharmacy, Shanghai Jiao Tong University, Building 6, Room 208, 800 Dongchuan road, Shanghai, 200240, China
| | - Yu Chen
- Engineering Research Center of Cell & Therapeutic Antibody, MOE, School of Pharmacy, Shanghai Jiao Tong University, Building 6, Room 208, 800 Dongchuan road, Shanghai, 200240, China
| | | | - Yueqing Xie
- Jecho Laboratories, Inc, Frederick, MD, 21704, USA
- Jecho Biopharmaceuticals Co., Ltd, Tianjin, 300467, China
| | - Baohong Zhang
- Engineering Research Center of Cell & Therapeutic Antibody, MOE, School of Pharmacy, Shanghai Jiao Tong University, Building 6, Room 208, 800 Dongchuan road, Shanghai, 200240, China
| | - Yanlin Bian
- Engineering Research Center of Cell & Therapeutic Antibody, MOE, School of Pharmacy, Shanghai Jiao Tong University, Building 6, Room 208, 800 Dongchuan road, Shanghai, 200240, China
| | - Dimiter S Dimitrov
- University of Pittsburgh Department of Medicine, Pittsburgh, PA, 15261, USA
| | - Yunsheng Yuan
- Engineering Research Center of Cell & Therapeutic Antibody, MOE, School of Pharmacy, Shanghai Jiao Tong University, Building 6, Room 208, 800 Dongchuan road, Shanghai, 200240, China.
| | - Jianwei Zhu
- Engineering Research Center of Cell & Therapeutic Antibody, MOE, School of Pharmacy, Shanghai Jiao Tong University, Building 6, Room 208, 800 Dongchuan road, Shanghai, 200240, China.
- Jecho Laboratories, Inc, Frederick, MD, 21704, USA.
- Jecho Biopharmaceuticals Co., Ltd, Tianjin, 300467, China.
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Maciuba S, Bowden GD, Stratton HJ, Wisniewski K, Schteingart CD, Almagro JC, Valadon P, Lowitz J, Glaser SM, Lee G, Dolatyari M, Navratilova E, Porreca F, Rivière PJ. Discovery and characterization of prolactin neutralizing monoclonal antibodies for the treatment of female-prevalent pain disorders. MAbs 2023; 15:2254676. [PMID: 37698877 PMCID: PMC10498814 DOI: 10.1080/19420862.2023.2254676] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 08/19/2023] [Accepted: 08/30/2023] [Indexed: 09/13/2023] Open
Abstract
Prolactin (PRL) has recently been demonstrated to elicit female-selective nociceptor sensitization and increase pain-like behaviors in female animals. Here we report the discovery and characterization of first-in-class, humanized PRL neutralizing monoclonal antibodies (PRL mAbs). We obtained two potent and selective PRL mAbs, PL 200,031 and PL 200,039. PL 200,031 was engineered as human IgG1 whereas PL 200,039 was reformatted as human IgG4. Both mAbs have sub-nanomolar affinity for human PRL (hPRL) and produce concentration-dependent and complete inhibition of hPRL signaling at the hPRL receptor (hPRLR). These two PRL mAbs are selective for hPRL as they do not inhibit other hPRLR agonists such as human growth hormone or placental lactogen. They also cross-react with non-human primate PRL but not with rodent PRL. Further, both mAbs show long clearance half-lives after intravenous administration in FcRn-humanized mice. Consistent with their isotypes, these mAbs only differ in binding affinities to Fcγ receptors, as expected by design. Finally, PL 200,019, the murine parental mAb of PL 200,031 and PL 200,039, fully blocked stress-induced and PRL-dependent pain behaviors in female PRL-humanized mice, thereby providing in vivo preclinical proof-of-efficacy for PRL mAbs in mechanisms relevant to pain in females.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Grace Lee
- Department of Pharmacology, The University of Arizona, Tucson, AZ, USA
| | - Mahdi Dolatyari
- Department of Pharmacology, The University of Arizona, Tucson, AZ, USA
| | - Edita Navratilova
- Department of Pharmacology, The University of Arizona, Tucson, AZ, USA
| | - Frank Porreca
- Department of Pharmacology, The University of Arizona, Tucson, AZ, USA
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Abstract
The pathogenesis of breast cancer is driven by multiple hormones and growth factors. One of these, prolactin (PRL), contributes to both mammary differentiation and oncogenesis, and yet the basis for these disparate effects has remained unclear. The focus of this review is to examine and place into context 2 recent studies that have provided insight into the roles of PRL receptors and PRL in tumorigenesis and tumor progression. One study provides novel evidence for opposing actions of PRL in the breast being mediated in part by differential PRL receptor (PRLr) isoform utilization. Briefly, homomeric complexes of the long isoform of the PRLr (PRLrL-PRLrL) promotes mammary differentiation, while heteromeric complexes of the intermediate and long PRLr (PRLrI-PRLrL) isoforms trigger mammary oncogenesis. Another study describes an immunodeficient, prolactin-humanized mouse model, NSG-Pro, that facilitates growth of PRL receptor-expressing patient-derived breast cancer xenografts. Evidence obtained with this model supports the interactions of physiological levels of PRL with estrogen and ERBB2 gene networks, the modulatory effects of PRL on drug responsiveness, and the pro-metastatic effects of PRL on breast cancer. This recent progress provides novel concepts, mechanisms and experimental models expected to renew interest in harnessing/exploiting PRLr signaling for therapeutic effects in breast cancer.
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Affiliation(s)
- Charles V Clevenger
- Correspondence: Charles V. Clevenger, Department of Pathology, Virginia Commonwealth University, 1101 E. Marshall St, Sanger 4-006A, Richmond, VA, 23298-06629, USA.
| | - Hallgeir Rui
- Department of Pathology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
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4
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Standing D, Dandawate P, Anant S. Prolactin receptor signaling: A novel target for cancer treatment - Exploring anti-PRLR signaling strategies. Front Endocrinol (Lausanne) 2022; 13:1112987. [PMID: 36714582 PMCID: PMC9880166 DOI: 10.3389/fendo.2022.1112987] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 12/22/2022] [Indexed: 01/15/2023] Open
Abstract
Prolactin (PRL) is a peptide hormone mainly secreted from the anterior pituitary gland. PRL is reported to play a role in pregnancy, mammary gland development, immune modulation, reproduction, and differentiation of islet cells. PRL binds to its receptor PRLR, which belongs to a superfamily of the class I cytokine receptor that has no intrinsic kinase activity. In canonical signaling, PRL binding to PRLR induces downstream signaling including JAK-STAT, AKT and MAPK pathways. This leads to increased cell proliferation, stemness, migration, apoptosis inhibition, and resistance to chemotherapy. PRL-signaling is upregulated in numerous hormone-dependent cancers including breast, prostate, ovarian, and endometrial cancer. However, more recently, the pathway has been reported to play a tumor-promoting role in other cancer types such as colon, pancreas, and hepatocellular cancers. Hence, the signaling pathway is an attractive target for drug development with blockade of the receptor being a potential therapeutic approach. Different strategies have been developed to target this receptor including modification of PRL peptides (Del1-9-G129R-hPRL, G129R-Prl), growth hormone receptor/prolactin receptor bispecific antibody antagonist, neutralizing antibody LFA102, an antibody-drug conjugate (ABBV-176) of the humanized antibody h16f (PR-1594804) and pyrrolobenzodiazepine dimer, a bispecific antibody targeting both PRLR and CD3, an in vivo half-life extended fusion protein containing PRLR antagonist PrlRA and albumin binding domain. There have also been attempts to discover and develop small molecular inhibitors targeting PRLR. Recently, using structure-based virtual screening, we identified a few antipsychotic drugs including penfluridol as a molecule that inhibits PRL-signaling to inhibit PDAC tumor progression. In this review, we will summarize the recent advances in the biology of this receptor in cancer and give an account of PRLR antagonist development for the treatment of cancer.
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5
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Abstract
Prolactin coordinates with the ovarian steroids to orchestrate mammary development and lactation, culminating in nourishment and an increasingly appreciated array of other benefits for neonates. Its central activities in mammary epithelial growth and differentiation suggest that it plays a role(s) in breast cancer, but it has been challenging to identify its contributions, essential for incorporation into prevention and treatment approaches. Large prospective epidemiologic studies have linked higher prolactin exposure to increased risk, particularly for ER+ breast cancer in postmenopausal women. However, it has been more difficult to determine its actions and clinical consequences in established tumors. Here we review experimental data implicating multiple mechanisms by which prolactin may increase the risk of breast cancer. We then consider the evidence for role(s) of prolactin and its downstream signaling cascades in disease progression and treatment responses, and discuss how new approaches are beginning to illuminate the biology behind the seemingly conflicting epidemiologic and experimental studies of prolactin actions across diverse breast cancers.
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Ali S, Hamam D, Liu X, Lebrun JJ. Terminal differentiation and anti-tumorigenic effects of prolactin in breast cancer. Front Endocrinol (Lausanne) 2022; 13:993570. [PMID: 36157462 PMCID: PMC9499354 DOI: 10.3389/fendo.2022.993570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 08/19/2022] [Indexed: 11/13/2022] Open
Abstract
Breast cancer is a major disease affecting women worldwide. A woman has 1 in 8 lifetime risk of developing breast cancer, and morbidity and mortality due to this disease are expected to continue to rise globally. Breast cancer remains a challenging disease due to its heterogeneity, propensity for recurrence and metastasis to distant vital organs including bones, lungs, liver and brain ultimately leading to patient death. Despite the development of various therapeutic strategies to treat breast cancer, still there are no effective treatments once metastasis has occurred. Loss of differentiation and increased cellular plasticity and stemness are being recognized molecularly and clinically as major derivers of heterogeneity, tumor evolution, relapse, metastasis, and therapeutic failure. In solid tumors, breast cancer is one of the leading cancer types in which tumor differentiation state has long been known to influence cancer behavior. Reprograming and/or restoring differentiation of cancer cells has been proposed to provide a viable approach to reverse the cancer through differentiation and terminal maturation. The hormone prolactin (PRL) is known to play a critical role in mammary gland lobuloalveolar development/remodeling and the terminal differentiation of the mammary epithelial cells promoting milk proteins gene expression and lactation. Here, we will highlight recent discoveries supporting an anti-tumorigenic role for PRL in breast cancer as a "pro/forward-differentiation" pathway restricting plasticity, stemness and tumorigenesis.
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Levels of prolactin and testosterone and associated sexual dysfunction and breast abnormalities in men with schizophrenia treated with antipsychotic medications. J Psychiatr Res 2021; 143:50-53. [PMID: 34450525 DOI: 10.1016/j.jpsychires.2021.08.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 08/11/2021] [Accepted: 08/17/2021] [Indexed: 11/20/2022]
Abstract
Sexual dysfunction is one of the most bothersome adverse drug effects seen in men and women taking antipsychotic medications and negatively impacts medication adherence. Antipsychotic medications are associated with hyperprolactinemia, which is known to contribute to sexual and hormonal side effects in men. However, testosterone also plays a key factor in male sexual function and may be affected by abnormal prolactin levels through gonadotropin-releasing hormone inhibition. This study was a pilot study undertaken to assess the prevalence of elevations in prolactin levels, related reductions in testosterone levels, associated symptoms of sexual dysfunction and breast abnormalities in male participants, and related distress to these symptoms in men taking prolactin-elevating antipsychotic medications. The study was conducted as a cross-sectional study. Our results showed a notably high prevalence of sexual side effects in this population, with gynecomastia occurring in 50% and penile-related symptoms in 73%. Additionally, we found elevated prolactin levels in 68% and low testosterone levels in 55% of our participants. This study was limited in its power due to a small sample size of 22 men and the lack of a control group. Still, even in our relatively small sample, we see a trend of hyperprolactinemia being associated with low testosterone and a significant correlation of low testosterone levels with penile-related symptoms. This suggests that testosterone plays a major role in the sexual side effects reported by men taking antipsychotics, although larger studies are needed to further categorize this relationship.
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Sun Y, Yang N, Utama FE, Udhane SS, Zhang J, Peck AR, Yanac A, Duffey K, Langenheim JF, Udhane V, Xia G, Peterson JF, Jorns JM, Nevalainen MT, Rouet R, Schofield P, Christ D, Ormandy CJ, Rosenberg AL, Chervoneva I, Tsaih SW, Flister MJ, Fuchs SY, Wagner KU, Rui H. NSG-Pro mouse model for uncovering resistance mechanisms and unique vulnerabilities in human luminal breast cancers. SCIENCE ADVANCES 2021; 7:eabc8145. [PMID: 34524841 PMCID: PMC8443188 DOI: 10.1126/sciadv.abc8145] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 07/21/2021] [Indexed: 06/13/2023]
Abstract
Most breast cancer deaths are caused by estrogen receptor-α–positive (ER+) disease. Preclinical progress is hampered by a shortage of therapy-naïve ER+ tumor models that recapitulate metastatic progression and clinically relevant therapy resistance. Human prolactin (hPRL) is a risk factor for primary and metastatic ER+ breast cancer. Because mouse prolactin fails to activate hPRL receptors, we developed a prolactin-humanized Nod-SCID-IL2Rγ (NSG) mouse (NSG-Pro) with physiological hPRL levels. Here, we show that NSG-Pro mice facilitate establishment of therapy-naïve, estrogen-dependent PDX tumors that progress to lethal metastatic disease. Preclinical trials provide first-in-mouse efficacy of pharmacological hPRL suppression on residual ER+ human breast cancer metastases and document divergent biology and drug responsiveness of tumors grown in NSG-Pro versus NSG mice. Oncogenomic analyses of PDX lines in NSG-Pro mice revealed clinically relevant therapy-resistance mechanisms and unexpected, potently actionable vulnerabilities such as DNA-repair aberrations. The NSG-Pro mouse unlocks previously inaccessible precision medicine approaches for ER+ breast cancers.
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Affiliation(s)
- Yunguang Sun
- Department of Pathology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Ning Yang
- Department of Pathology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Fransiscus E. Utama
- Department of Pathology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Sameer S. Udhane
- Department of Pathology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Junling Zhang
- Department of Pathology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Amy R. Peck
- Department of Pathology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Alicia Yanac
- Department of Pathology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Katherine Duffey
- Department of Pathology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - John F. Langenheim
- Department of Pathology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Vindhya Udhane
- Department of Pathology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Guanjun Xia
- Department of Pathology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Jess F. Peterson
- Department of Pathology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Julie M. Jorns
- Department of Pathology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Marja T. Nevalainen
- Department of Pathology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
- Department of Pharmacology and Toxicology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Romain Rouet
- Immunology Division, University of New South Wales, Darlinghurst, NSW 2010, Australia
| | - Peter Schofield
- Immunology Division, University of New South Wales, Darlinghurst, NSW 2010, Australia
| | - Daniel Christ
- Immunology Division, University of New South Wales, Darlinghurst, NSW 2010, Australia
| | - Christopher J. Ormandy
- Garvan Institute of Medical Research and St. Vincent’s Clinical School, University of New South Wales, Darlinghurst, NSW 2010, Australia
| | - Anne L. Rosenberg
- Department of Surgery, Thomas Jefferson University, Philadelphia, PA 19107, USA
| | - Inna Chervoneva
- Department of Pharmacology, Division of Biostatistics, Thomas Jefferson University, Philadelphia, PA 19107, USA
| | - Shirng-Wern Tsaih
- Department of Physiology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Michael J. Flister
- Department of Physiology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Serge Y. Fuchs
- Department of Biomedical Sciences, University of Pennsylvania School of Veterinary Medicine, Philadelphia, PA 19104, USA
| | - Kay-Uwe Wagner
- Karmanos Cancer Institute, Wayne State University, Detroit, MI 48201, USA
| | - Hallgeir Rui
- Department of Pathology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
- Department of Pharmacology and Toxicology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
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Anderson MG, Zhang Q, Rodriguez LE, Hecquet CM, Donawho CK, Ansell PJ, Reilly EB. ABBV-176, a PRLR antibody drug conjugate with a potent DNA-damaging PBD cytotoxin and enhanced activity with PARP inhibition. BMC Cancer 2021; 21:681. [PMID: 34107902 PMCID: PMC8191021 DOI: 10.1186/s12885-021-08403-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Accepted: 05/25/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Prolactin receptor (PRLR) is an attractive antibody therapeutic target with expression across a broad population of breast cancers. Antibody efficacy, however, may be limited to subtypes with either PRLR overexpression and/or those where estradiol no longer functions as a mitogen and are, therefore, reliant on PRLR signaling for growth. In contrast a potent PRLR antibody-drug conjugate (ADC) may provide improved therapeutic outcomes extending beyond either PRLR overexpressing or estradiol-insensitive breast cancer populations. METHODS We derived a novel ADC targeting PRLR, ABBV-176, that delivers a pyrrolobenzodiazepine (PBD) dimer cytotoxin, an emerging class of warheads with enhanced potency and broader anticancer activity than the clinically validated auristatin or maytansine derivatives. This agent was tested in vitro and in vivo cell lines and patient derived xenograft models. RESULTS In both in vitro and in vivo assays, ABBV-176 exhibits potent cytotoxicity against multiple cell line and patient-derived xenograft breast tumor models, including triple negative and low PRLR expressing models insensitive to monomethyl auristatin (MMAE) based PRLR ADCs. ABBV-176, which cross links DNA and causes DNA breaks by virtue of its PBD warhead, also demonstrates enhanced anti-tumor activity in several breast cancer models when combined with a poly-ADP ribose polymerase (PARP) inhibitor, a potentiator of DNA damage. CONCLUSIONS Collectively the efficacy and safety profile of ABBV-176 suggest it may be an effective therapy across a broad range of breast cancers and other cancer types where PRLR is expressed with the potential to combine with other therapeutics including PARP inhibitors.
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Affiliation(s)
- Mark G Anderson
- AbbVie Inc., Oncology Discovery, 1 North Waukegan Rd., North Chicago, IL, 60064-6099, USA.
| | - Qian Zhang
- AbbVie Inc., Oncology Discovery, 1 North Waukegan Rd., North Chicago, IL, 60064-6099, USA
| | - Luis E Rodriguez
- AbbVie Inc., Oncology Discovery, 1 North Waukegan Rd., North Chicago, IL, 60064-6099, USA
| | - Claudie M Hecquet
- AbbVie Inc., Oncology Discovery, 1 North Waukegan Rd., North Chicago, IL, 60064-6099, USA
| | - Cherrie K Donawho
- Formerly AbbVie, Oncology Discovery, 1 North Waukegan Rd., North Chicago, IL, 60064, USA
| | - Peter J Ansell
- AbbVie Inc., Oncology Discovery, 1 North Waukegan Rd., North Chicago, IL, 60064-6099, USA
| | - Edward B Reilly
- AbbVie Inc., Oncology Discovery, 1 North Waukegan Rd., North Chicago, IL, 60064-6099, USA
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Suppression of Breast Cancer by Small Molecules That Block the Prolactin Receptor. Cancers (Basel) 2021; 13:cancers13112662. [PMID: 34071395 PMCID: PMC8198871 DOI: 10.3390/cancers13112662] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 05/24/2021] [Accepted: 05/24/2021] [Indexed: 12/25/2022] Open
Abstract
Simple Summary Unabated tumor growth, metastasis, and resistance to hormone therapy and/or to chemotherapy constitute serious impediments for combating breast cancer (BC). With the exception of targeted anti-HER2/neu therapy and combination therapies, there have been no radical changes in the standard of care for BC patients in the past two decades. In addition, there are only limited options for treating BC-derived brain metastases that cause high morbidity and mortality. This report describes the use of high throughput screening (HTS) for identifying novel small molecules that blocked the prolactin receptor (PRLR) and suppressed BC in a laboratory setting. These small molecules have a great potential to become effective therapeutics in patients with BC. Abstract Prolactin (PRL) is a protein hormone which in humans is secreted by pituitary lactotrophs as well as by many normal and malignant non-pituitary sites. Many lines of evidence demonstrate that both circulating and locally produced PRL increase breast cancer (BC) growth and metastases and confer chemoresistance. Our objective was to identify and then characterize small molecules that block the tumorigenic actions of PRL in BC. We employed three cell-based assays in high throughput screening (HTS) of 51,000 small molecules and identified two small molecule inhibitors (SMIs), named SMI-1 and SMI-6. Both compounds bound to the extracellular domain (ECD) of the PRL receptor (PRLR) at 1–3 micromolar affinity and abrogated PRL-induced breast cancer cell (BCC) invasion and malignant lymphocyte proliferation. SMI-6 effectively reduced the viability of multiple BCC types, had much lower activity against various non-malignant cells, displayed high selectivity, and showed no apparent in vitro or in vivo toxicity. In athymic nude mice, SMI-6 rapidly and dramatically suppressed the growth of PRL-expressing BC xenografts. This report represents a pre-clinical phase of developing novel anti-cancer agents with the potential to become effective therapeutics in breast cancer patients.
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Chou JC, Lieu FK, Ho DMT, Shen HY, Lin PH, Hu S, Wang SW, Lin H, Wang PS. Regulation of extracellular and intracellular prolactin on cell proliferation and survival rate through GHR/JAK2/STAT3 pathway in NSCLC. CHEMOSPHERE 2021; 264:128604. [PMID: 33268090 DOI: 10.1016/j.chemosphere.2020.128604] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 09/22/2020] [Accepted: 10/09/2020] [Indexed: 06/12/2023]
Abstract
Styrene increases serum prolactin (PRL) concentration. Hyperprolactinemia is associated with poor prognosis in lung cancer patients, but the mechanism of PRL action is unclear. The aims of this study were to (i) investigate the mechanism of PRL-action receptor in NSCLC cells (ii) measure whether PRL was secreted by NSCLC cells and its stimulatory mechanism in vitro and in vivo. We found that cell proliferation was increased after treatment of a pharmacological dose of PRL in A549 cells, which through up regulation of growth hormone receptor (GHR) and downstream of JAK2/STAT3/VEGF pathway. All NSCLC cells in the present study secreted PRL and expressed GHR, but not PRLR. Inhibition of GHR protein level led to decrease the PRL-induced cell proliferation. PRL was detected in NSCLC cells culture medium. Knockdown of intracellular PRL downregulated JAK2/STAT3 protein activities and GHR and VEGF protein levels. Furthermore, knockdown of intracellular PRL reduced the cell proliferation and the ability of colony-forming. In lung cancer tissues, PRL, GHR and VEGF levels were higher in the tumor tissues than in normal tissues and the protein expressions of these three proteins are positively correlated, respectively. High expression levels of both PRL and GHR cause a poor survival rate in lung cancer patients. Taken together, our results suggested that extracellular and intracellular PRL were involved in cell proliferation through GHR. Combination of in vitro and in vivo results, GHR and PRL are important targets for suppressing NSCLC cell proliferation, which might improve the survival rate in NSCLC patients.
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Affiliation(s)
- Jou-Chun Chou
- Department of Life Sciences, National Chung Hsing University, Taichung, 402204, Taiwan, ROC; Medical Center of Aging Research, China Medical University Hospital, Taichung, 404333, Taiwan, ROC
| | - Fu-Kong Lieu
- Department of Physical Medicine and Rehabilitation, Cheng Hsin General Hospital, Taipei, 112401, Taiwan, ROC; Department of Physical Medicine and Rehabilitation, National Defense Medical Center, Taipei, 114201, Taiwan, ROC
| | - Donald Ming-Tak Ho
- Department of Pathology & Lab. Medicine, Cheng Hsin General Hospital, Taipei, 112401, Taiwan, ROC; Department of Pathology, School of Medicine, National Yang-Ming University, Taipei, 112304, Taiwan, ROC
| | - Heng-Yi Shen
- Department of Physical Medicine and Rehabilitation, Cheng Hsin General Hospital, Taipei, 112401, Taiwan, ROC
| | - Po-Han Lin
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, 112304, Taiwan, ROC
| | - Sindy Hu
- Anesthetic Medical Center, Department of Dermatology, Chang Gung Memorial Hospital, Taoyuan, 333423, Taiwan, ROC; Department of Medicine, College of Medicine, Chang Gung University, Taoyuan, 333323, Taiwan, ROC
| | - Shyi-Wu Wang
- Anesthetic Medical Center, Department of Dermatology, Chang Gung Memorial Hospital, Taoyuan, 333423, Taiwan, ROC; Department of Physiology and Pharmacology, Chang Gung University, Taoyuan, 333323, Taiwan, ROC.
| | - Ho Lin
- Department of Life Sciences, National Chung Hsing University, Taichung, 402204, Taiwan, ROC.
| | - Paulus S Wang
- Medical Center of Aging Research, China Medical University Hospital, Taichung, 404333, Taiwan, ROC; Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, 112304, Taiwan, ROC; Department of Biotechnology, College of Health Science, Asia University, Taichung, 413305, Taiwan, ROC; Department of Medical Research, Taipei Veterans General Hospital, Taipei, 112201, Taiwan, ROC.
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12
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Sa-Nguanraksa D, Mitpakdi K, Samarnthai N, Thumrongtaradol T, O-Charoenrat P. Expression of long-form prolactin receptor is associated with lower disease-free and overall survival in node-negative breast cancer patients. Gland Surg 2021; 10:130-142. [PMID: 33633970 DOI: 10.21037/gs-20-569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Background Breast cancer is the most frequent female malignancy in Thailand. Prolactin (PRL) and prolactin receptor (PRLR) play an important role in normal breast development and carcinogenesis of breast cancer. There are two major isoforms of PRLR, consisting of long-form (LF-PRLR) and short-form (SF-PRLR) that stimulate different signaling pathways. This study aims to explore the associations between all PRLR isoforms (all-PRLR) and LF-PRLR with clinicopathological parameters in breast cancer patients. Methods A total of 340 patients were recruited from January 2009 to December 2015. Expressions of PRLR in breast cancer tissue were determined by immunohistochemistry using specific antibodies that recognize different domains of PRLR (B6.2 for all-PRLR and H-300 for LF-PRLR). The associations between all-PRLR and LF-PRLR expressions with clinicopathological parameters were evaluated. Results Expression of all-PRLR was observed in 86.2% of all patients while LF-PRLR expression was observed in 54.4%. All-PRLR was co-expressed with estrogen receptor (ER) and progesterone receptor (PR). LF-PRLR expression was associated with high grade tumor and human epidermal growth factor receptor-2 (HER2) overexpression (P=0.010 and <0.001, respectively). Subgroup analysis revealed that LF-PRLR expression was the independent predictor for lower disease-free survival (DFS) in node-negative breast cancer patients with high expression of all-PRLR [hazard ratio (HR): 5.224, 95% confidence interval (CI): 1.089-25.064, P=0.039]. Conclusions The presence of LF-PRLR in the patients with high expression of all-PRLR was associated with adverse outcome. Evaluation of all-PRLR and LF-PRLR might be used as novel prognosticators in node-negative breast cancers.
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Affiliation(s)
- Doonyapat Sa-Nguanraksa
- Division of Head Neck and Breast Surgery, Department of Surgery, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Kwanlada Mitpakdi
- Department of Anatomy, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Norasate Samarnthai
- Department of Pathology, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Thanawat Thumrongtaradol
- Division of Head Neck and Breast Surgery, Department of Surgery, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
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13
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Ramírez-de-Arellano A, Villegas-Pineda JC, Hernández-Silva CD, Pereira-Suárez AL. The Relevant Participation of Prolactin in the Genesis and Progression of Gynecological Cancers. Front Endocrinol (Lausanne) 2021; 12:747810. [PMID: 34745013 PMCID: PMC8566755 DOI: 10.3389/fendo.2021.747810] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 09/28/2021] [Indexed: 12/28/2022] Open
Abstract
Prolactin (PRL) is a hormone produced by the pituitary gland and multiple non-pituitary sites, vital in several physiological processes such as lactation, pregnancy, cell growth, and differentiation. However, PRL is nowadays known to have a strong implication in oncogenic processes, making it essential to delve into the mechanisms governing these actions. PRL and its receptor (PRLR) activate a series of effects such as survival, cellular proliferation, migration, invasion, metastasis, and resistance to treatment, being highly relevant in developing certain types of cancer. Because women produce high levels of PRL, its influence in gynecological cancers is herein reviewed. It is interesting that, other than the 23 kDa PRL, whose mechanism of action is endocrine, other variants of PRL have been observed to be produced by tumoral tissue, acting in a paracrine/autocrine manner. Because many components, including PRL, surround the microenvironment, it is interesting to understand the hormone's modulation in cancer cells. This work aims to review the most important findings regarding the PRL/PRLR axis in cervical, ovarian, and endometrial cancers and its molecular mechanisms to support carcinogenesis.
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Affiliation(s)
- Adrián Ramírez-de-Arellano
- Instituto de Investigación en Ciencias Biomédicas, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Mexico
| | - Julio César Villegas-Pineda
- Instituto de Investigación en Ciencias Biomédicas, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Mexico
- Doctorado en Ciencias Biomédicas, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Mexico
| | - Christian David Hernández-Silva
- Doctorado en Ciencias Biomédicas, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Mexico
| | - Ana Laura Pereira-Suárez
- Doctorado en Ciencias Biomédicas, Departamento de Fisiología, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Mexico
- Departamento de Microbiología y Patología, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Mexico
- *Correspondence: Ana Laura Pereira-Suárez,
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14
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Chen X, Wu D, Zheng Y, Liu X, Wang J. Preparation of a Growth Hormone Receptor/Prolactin Receptor Bispecific Antibody Antagonist Which Exhibited Anti-Cancer Activity. Front Pharmacol 2020; 11:598423. [PMID: 33362552 PMCID: PMC7759028 DOI: 10.3389/fphar.2020.598423] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 11/13/2020] [Indexed: 01/30/2023] Open
Abstract
Prolactin receptor (PRLR) and growth hormone receptor (GHR) are closely related to the occurrence and development of breast cancer, and breast cancer cell endogenously express GHR, PRLR and GHR-PRLR heterodimer. In this case, the combined use of PRLR or GHR inhibitors may produce better anti-breast cancer potential than PRLR or GHR inhibitors alone. In this case, it is necessary to develop the dual-function GHR/PRLR antagonists with anti-breast cancer potential. For this, we used hybridoma technology to generate an anti-idiotypic antibody (termed H53). We then used various techniques, including competitive ELISA, competitive receptor binding analysis, and indirect immunofluorescence assay to identify H53, and the results show that H53 behaves as a typical internal image anti-idiotypic antibody (Ab2β). Further experiments indicate that H53 is a dual-function inhibitor, which not only inhibited PRLR-mediated intracellular signaling, but also blocked GHR-mediated intracellular signaling in a dose-dependent manner. Furthermore, H53 could inhibit PRL/GH-driven cancer cell proliferation in vivo and in vitro. This study indicates that H53 exhibits potential biological activity against breast tumors, which implies that internal image anti-idiotypic antibodies may be a useful strategy for the development of PRLR/GHR dual-function antagonists for breast cancer therapy.
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Affiliation(s)
- Xin Chen
- Department of Radiology, The First Hospital of Jilin University, Changchun, China
| | - Di Wu
- Department of Breast Surgery, The First Hospital of Jilin University, Changchun, China
| | - Yan Zheng
- Department of Geriatrics, The First Hospital of Jilin University, Changchun, China
| | - Xingxing Liu
- Department of Geriatrics, The First Hospital of Jilin University, Changchun, China
| | - Jianmeng Wang
- Department of Geriatrics, The First Hospital of Jilin University, Changchun, China
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15
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Prolactin: A hormone with diverse functions from mammary gland development to cancer metastasis. Semin Cell Dev Biol 2020; 114:159-170. [PMID: 33109441 DOI: 10.1016/j.semcdb.2020.10.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 10/04/2020] [Accepted: 10/11/2020] [Indexed: 01/14/2023]
Abstract
Prolactin has a rich mechanistic set of actions and signaling in order to elicit developmental effects in mammals. Historically, prolactin has been appreciated as an endocrine peptide hormone that is responsible for final, functional mammary gland development and lactation. Multiple signaling pathways impacted upon by the microenvironment contribute to cell function and differentiation. Endocrine, autocrine and paracrine signaling are now apparent in not only mammary development, but also in cancer, and involve multiple cell types including those of the immune system. Multiple ligands agonists are capable of binding to the prolactin receptor, potentially expanding receptor function. Prolactin has an important role not only in tumorigenesis of the breast, but also in a number of hormonally responsive cancers such as prostate, ovarian and endometrial cancer, as well as pancreatic and lung cancer. Although pituitary and extra-pituitary sources of prolactin such as the epithelium are important, stromal sourced prolactin is now also being recognized as an important factor in tumor progression, all of which potentially signal to multiple cell types in the tumor microenvironment. While prolactin has important roles in milk production including calcium and bone homeostasis, in the disease state it can also affect bone homeostasis. Prolactin also impacts metastatic cancer of the breast to modulate the bone microenvironment and promote bone damage. Prolactin has a fascinating contribution in both physiologic and pathologic settings of mammals.
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16
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Asad AS, Nicola Candia AJ, Gonzalez N, Zuccato CF, Seilicovich A, Candolfi M. The role of the prolactin receptor pathway in the pathogenesis of glioblastoma: what do we know so far? Expert Opin Ther Targets 2020; 24:1121-1133. [PMID: 32896197 DOI: 10.1080/14728222.2020.1821187] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Introduction: Prolactin (PRL) and its receptor (PRLR) have been associated with the development of hormone-dependent tumors and have been detected in glioblastoma (GBM) biopsies. GBM is the most common and aggressive primary brain tumor in adults and the prognosis for patients is dismal; hence researchers are exploring the PRLR pathway as a therapeutic target in this disease. Areas covered: This paper explores the effects of PRLR activation on the biology of GBM, the correlation between PRL and PRLR expression and GBM progression and survival in male and female patients. Finally, we discuss how a better understanding of the PRLR pathway may allow the development of novel treatments for GBM. Expert opinion: We propose PRL and PRLR as potential prognosis biomarkers and therapeutic targets in GBM. Local administration of PRLR inhibitors using gene therapy may offer a beneficial strategy for targeting GBM cells disseminated in the non-neoplastic brain; however, efficacy and safety require careful and extensive evaluation. The data depicted herein underline the need to (i) improve our understanding of sexual dimorphism in GBM, and (ii) develop accurate preclinical models that take into consideration different hormonal contexts, specific genetic alterations, and tumor grades.
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Affiliation(s)
- Antonela S Asad
- Instituto de Investigaciones Biomédicas (INBIOMED, UBA-CONICET), Facultad de Medicina, Universidad de Buenos Aires , Buenos Aires, Argentina
| | - Alejandro J Nicola Candia
- Instituto de Investigaciones Biomédicas (INBIOMED, UBA-CONICET), Facultad de Medicina, Universidad de Buenos Aires , Buenos Aires, Argentina
| | - Nazareno Gonzalez
- Instituto de Investigaciones Biomédicas (INBIOMED, UBA-CONICET), Facultad de Medicina, Universidad de Buenos Aires , Buenos Aires, Argentina
| | - Camila F Zuccato
- Instituto de Investigaciones Biomédicas (INBIOMED, UBA-CONICET), Facultad de Medicina, Universidad de Buenos Aires , Buenos Aires, Argentina
| | - Adriana Seilicovich
- Instituto de Investigaciones Biomédicas (INBIOMED, UBA-CONICET), Facultad de Medicina, Universidad de Buenos Aires , Buenos Aires, Argentina.,departamento de Biología Celular e Histología, Facultad de Medicina, Universidad de Buenos Aires , Buenos Aires, Argentina
| | - Marianela Candolfi
- Instituto de Investigaciones Biomédicas (INBIOMED, UBA-CONICET), Facultad de Medicina, Universidad de Buenos Aires , Buenos Aires, Argentina
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17
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Wen Y, Wang Y, Chelariu-Raicu A, Stur E, Liu Y, Corvigno S, Bartsch F, Redfern L, Zand B, Kang Y, Liu J, Baggerly K, Sood AK. Blockade of the Short Form of Prolactin Receptor Induces FOXO3a/EIF-4EBP1-Mediated Cell Death in Uterine Cancer. Mol Cancer Ther 2020; 19:1943-1954. [PMID: 32737156 DOI: 10.1158/1535-7163.mct-19-1026] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 03/30/2020] [Accepted: 07/07/2020] [Indexed: 12/13/2022]
Abstract
Abnormal activity of human prolactin (PRL) and its membrane-associated receptor (PRLR) contributes to the progression of uterine carcinoma. However, the underlying mechanisms are not well understood, and current means of targeting the PRL/PRLR axis in uterine cancer are limited. Our integrated analyses using The Cancer Genome Atlas and Genotype-Tissue Expression (GTEx) databases demonstrated that a short form of PRLR (PRLR_SF) is the isoform predominantly expressed in human uterine cancers; expression of this PRLR_SF was elevated in uterine cancers in comparison with cancer-free uterine tissues. We hypothesized that the overexpression of PRLR_SF in uterine cancer cells contributes, in part, to the oncogenic activity of the PRL/PRLR axis. Next, we employed G129R, an antagonist of human PRL, to block the PRL/PRLR axis in both PTEN wt and PTEN mut orthotopic mouse models of uterine cancer. In comparison with control groups, treatment with G129R as monotherapy or in combination with paclitaxel resulted in a significant reduction of growth and progression of orthotopic uterine tumors. Results from protein profiling of uterine cancer cells and in vivo tumors revealed a set of new downstream targets for G129R. Our results showed that G129R induced sub-G0 population arrest, decreased nascent protein synthesis, and initiated FOXO3a/EIF-4EBP1-mediated cell death in both PTEN wt and PTEN mut uterine cancer cells. Collectively, our results show a unique pattern of PRLR_SF expression predominantly in uterine cancer. Moreover, FOXO3a and EIF-4EBP1 are important mediators of cell death following G129R treatment in uterine cancer models.
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Affiliation(s)
- Yunfei Wen
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas.
| | - Ying Wang
- Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Anca Chelariu-Raicu
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Elaine Stur
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Yuan Liu
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas.,Department of BioSciences, Rice University, Houston, Texas
| | - Sara Corvigno
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Faith Bartsch
- Department of Physician Assistant Studies, George Washington University, Washington, D.C
| | - Lauren Redfern
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Behrouz Zand
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Yu Kang
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Jinsong Liu
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Keith Baggerly
- Department of Bioinformatics and Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Anil K Sood
- Department of Gynecologic Oncology and Reproductive Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas
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18
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Abstract
A limited number of peripheral targets generate pain. Inflammatory mediators can sensitize these. The review addresses targets acting exclusively or predominantly on sensory neurons, mediators involved in inflammation targeting sensory neurons, and mediators involved in a more general inflammatory process, of which an analgesic effect secondary to an anti-inflammatory effect can be expected. Different approaches to address these systems are discussed, including scavenging proinflammatory mediators, applying anti-inflammatory mediators, and inhibiting proinflammatory or facilitating anti-inflammatory receptors. New approaches are contrasted to established ones; the current stage of progress is mentioned, in particular considering whether there is data from a molecular and cellular level, from animals, or from human trials, including an early stage after a market release. An overview of publication activity is presented, considering a IuPhar/BPS-curated list of targets with restriction to pain-related publications, which was also used to identify topics.
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Affiliation(s)
- Cosmin I Ciotu
- Center of Physiology and Pharmacology, Medical University of Vienna, Schwarzspanierstrasse 17, 1090, Vienna, Austria
| | - Michael J M Fischer
- Center of Physiology and Pharmacology, Medical University of Vienna, Schwarzspanierstrasse 17, 1090, Vienna, Austria.
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19
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Lemech C, Woodward N, Chan N, Mortimer J, Naumovski L, Nuthalapati S, Tong B, Jiang F, Ansell P, Ratajczak CK, Sachdev J. A first-in-human, phase 1, dose-escalation study of ABBV-176, an antibody-drug conjugate targeting the prolactin receptor, in patients with advanced solid tumors. Invest New Drugs 2020; 38:1815-1825. [PMID: 32524319 DOI: 10.1007/s10637-020-00960-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 05/28/2020] [Indexed: 11/26/2022]
Abstract
ABBV-176 is an antibody-drug conjugate composed of the humanized antibody h16f (PR-1594804) conjugated to a highly potent, cytotoxic cross-linking pyrrolobenzodiazepine dimer (PBD; SGD-1882) targeting the prolactin receptor (PRLR), which is overexpressed in several solid tumor types. This phase 1, dose-escalation study (NCT03145909) evaluated the safety, pharmacokinetics, and preliminary activity of ABBV-176 in patients with advanced solid tumors likely to exhibit elevated levels of PRLR. Patients received ABBV-176 once every 3 weeks. Dose escalation was by an exposure-adjusted, continual reassessment method. Dose-limiting toxicities (DLTs) were assessed from the first day of dosing until the next dose of ABBV-176 to determine the maximum tolerated dose (MTD) and recommended phase 2 dose (RP2D). Nineteen patients received ABBV-176 at doses from 2.7-109.35 μg/kg. Patients enrolled had colorectal cancer (n = 11), breast cancer (n = 6), or adrenocortical carcinoma (n = 2). DLTs occurred in 4 patients and included thrombocytopenia (n = 2; both at 99.9-μg/kg dose level), neutropenia (n = 2; 78.3-μg/kg and 99.9-μg/kg dose levels), and pancytopenia (n = 1; 109.35-μg/kg dose level). The most common treatment-emergent adverse events related to ABBV-176 were thrombocytopenia, neutropenia, increased aspartate aminotransferase, nausea, fatigue, and pleural effusions. Effusions and edema were common, and timing of onset suggested possible cumulative ABBV-176 toxicity. Tumor expression of PRLR varied among patients enrolled and analyzed. No patient had an objective response. MTD was not formally determined, as identification of a tolerable dose was confounded by late-onset toxicities. ABBV-176 was associated with significant toxicity in this phase 1, dose-escalation study. Although cytopenias were often dose limiting, effusions and edema were also common and had late onset that suggested cumulative toxicity. No responses were observed, although data were available from a small number of patients with variable tumor PRLR expression. This study was terminated after the dosing of 19 patients.
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Affiliation(s)
| | - Natasha Woodward
- Mater Misericordiae Ltd and Mater Research Institute/University of Queensland, Raymond Terrace, South Brisbane, QLD, Australia
| | - Nancy Chan
- Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, USA
| | | | | | | | - Bo Tong
- AbbVie Inc, North Chicago, IL, USA
| | | | | | | | - Jasgit Sachdev
- HonorHealth Research Institute, Scottsdale, AZ, 85258, USA.
- Translational Genomics Research Institute, Phoenix, AZ, 85004, USA.
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20
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Zhou Y, Zong H, Han L, Xie Y, Jiang H, Gilly J, Zhang B, Lu H, Chen J, Sun R, Pan Z, Zhu J. A novel bispecific antibody targeting CD3 and prolactin receptor (PRLR) against PRLR-expression breast cancer. J Exp Clin Cancer Res 2020; 39:87. [PMID: 32398042 PMCID: PMC7216678 DOI: 10.1186/s13046-020-01564-4] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 03/24/2020] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Prolactin receptor (PRLR) is highly expressed in a subset of human breast cancer and prostate cancer, which makes it a potential target for cancer treatment. In clinical trials, the blockade of PRLR was shown to be safe but with poor efficacy. It is therefore urgent to develop new therapies against PRLR target. Bispecific antibodies (BsAbs) could guide immune cells toward tumor cells, and produced remarkable effects in some cancers. METHODS In this study, a bispecific antibody targeting both tumor antigen PRLR and T cell surface CD3 antigen (PRLR-DbsAb) was constructed by split intein mediated protein transsplicing (BAPTS) system for the first time. Its binding activity was determined by Biacore and Flow cytometry, and target-dependent T cell mediated cytotoxicity was detected using LDH release assay. ELISA was utilized to study the secretion of cytokines by immune cells. Subcutaneous tumor mouse models were used to analyze the in vivo anti-tumor effects of PRLR-DbsAb. RESULTS PRLR-DbsAb in vitro could recruit and activate T cells to promote the release of Th1 cytokines IFN- γ and TNF- α, which could kill PRLR expressed breast cancer cells. In xenograft models with breast cancer cell line T47D, NOD/SCID mice intraperitoneally injected with PRLR-DbsAb exhibited significant inhibition of tumor growth and a longer survival compared to mice treated with PRLR monoclonal antibody (PRLR mAb). CONCLUSIONS Both in vitro and in vivo experiments showed PRLR-DbsAb had a potential therapy of cancer treatment potential therapy for cancer. Immunotherapy may be a promising treatment against the tumor target of PRLR.
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Affiliation(s)
- Yuexian Zhou
- Engineering Research Center of Cell & Therapeutic Antibody, MOE,Shanghai Jiao Tong University, Dongchuan Road, Shanghai, China
- School of Pharmacy, Shanghai Jiao Tong University, Dongchuan Road, Shanghai, China
| | - Huifang Zong
- Engineering Research Center of Cell & Therapeutic Antibody, MOE,Shanghai Jiao Tong University, Dongchuan Road, Shanghai, China
- School of Pharmacy, Shanghai Jiao Tong University, Dongchuan Road, Shanghai, China
| | - Lei Han
- Engineering Research Center of Cell & Therapeutic Antibody, MOE,Shanghai Jiao Tong University, Dongchuan Road, Shanghai, China
- School of Pharmacy, Shanghai Jiao Tong University, Dongchuan Road, Shanghai, China
| | | | - Hua Jiang
- Jecho Laboratories, Inc, Frederick, MD, USA
| | - John Gilly
- Jecho Laboratories, Inc, Frederick, MD, USA
| | - Baohong Zhang
- Engineering Research Center of Cell & Therapeutic Antibody, MOE,Shanghai Jiao Tong University, Dongchuan Road, Shanghai, China
- School of Pharmacy, Shanghai Jiao Tong University, Dongchuan Road, Shanghai, China
| | - Huili Lu
- Engineering Research Center of Cell & Therapeutic Antibody, MOE,Shanghai Jiao Tong University, Dongchuan Road, Shanghai, China
- School of Pharmacy, Shanghai Jiao Tong University, Dongchuan Road, Shanghai, China
| | - Jie Chen
- Engineering Research Center of Cell & Therapeutic Antibody, MOE,Shanghai Jiao Tong University, Dongchuan Road, Shanghai, China
- School of Pharmacy, Shanghai Jiao Tong University, Dongchuan Road, Shanghai, China
| | - Rui Sun
- Engineering Research Center of Cell & Therapeutic Antibody, MOE,Shanghai Jiao Tong University, Dongchuan Road, Shanghai, China
- School of Pharmacy, Shanghai Jiao Tong University, Dongchuan Road, Shanghai, China
| | - Zhidi Pan
- Engineering Research Center of Cell & Therapeutic Antibody, MOE,Shanghai Jiao Tong University, Dongchuan Road, Shanghai, China
- School of Pharmacy, Shanghai Jiao Tong University, Dongchuan Road, Shanghai, China
| | - Jianwei Zhu
- Engineering Research Center of Cell & Therapeutic Antibody, MOE,Shanghai Jiao Tong University, Dongchuan Road, Shanghai, China.
- School of Pharmacy, Shanghai Jiao Tong University, Dongchuan Road, Shanghai, China.
- Jecho Laboratories, Inc, Frederick, MD, USA.
- Jecho Biopharmaceuticals Co., Ltd, Tianjin, China.
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21
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Popnikolov N, Brzezinska K, Platoff RM, Binnebose R, Rothstein-Rubin R, Komarnicky LT, Woodworth A. Upregulation of Prolactin Receptor Expression and Activation of Prolactin Signaling in an Aggressive Triple-Negative Breast Carcinoma During Pregnancy: A Case Report. Clin Breast Cancer 2020; 20:e529-e539. [PMID: 32360085 DOI: 10.1016/j.clbc.2020.03.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 03/07/2020] [Accepted: 03/25/2020] [Indexed: 12/19/2022]
Affiliation(s)
- Nikolay Popnikolov
- Department of Pathology and Laboratory Medicine, Drexel University College of Medicine, Philadelphia, PA.
| | - Katarzyna Brzezinska
- Department of Pathology and Laboratory Medicine, Drexel University College of Medicine, Philadelphia, PA
| | - Rebecca M Platoff
- Department of Surgery, Drexel University College of Medicine, Philadelphia, PA
| | - Rhonda Binnebose
- Department of Pathology and Laboratory Medicine, Drexel University College of Medicine, Philadelphia, PA
| | | | - Lydia T Komarnicky
- Department of Radiation Oncology, Drexel University College of Medicine, Philadelphia, PA
| | - Amanda Woodworth
- Department of Surgery, Drexel University College of Medicine, Philadelphia, PA
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22
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Alarcón H, Bonzon-Kulichenko E, Peinado R, Lim F, Vázquez J, Rodríguez A. Generation of a lentiviral vector system to efficiently express bioactive recombinant human prolactin hormones. Mol Cell Endocrinol 2020; 499:110605. [PMID: 31580897 DOI: 10.1016/j.mce.2019.110605] [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: 06/28/2019] [Revised: 09/26/2019] [Accepted: 09/29/2019] [Indexed: 10/25/2022]
Abstract
The contribution of the pleiotropic hormone Prolactin (PRL) to several physiological and pathological processes is still unknown. To clarify the role of PRL in these processes during the last decade, different human PRL antagonists have been produced to either partially or fully block the wild type hormone activity. In this work, we have cloned these wild type and antagonist sequences in lentivectors (LV) to express them as recombinant self-processing polypeptides by employing a P2A sequence (hPRL-P2A-GFP). We show that these LVs can efficiently transduce and express the hPRL proteins in different cell types and that the P2A sequence does not affect their activities. Additionally, we have tested their activities in paracrine and autocrine cell culture experiments. Our results demonstrate that these recombinant hPRL-P2A proteins are bioactive in both paracrine and autocrine modes, highlighting the potential usefulness of these hPRL-containing LVs for determining the contribution of hPRL to different biological processes.
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Affiliation(s)
- Hernán Alarcón
- Department of Molecular Biology, Autonomous University of Madrid, Madrid, 28049, Spain
| | - Elena Bonzon-Kulichenko
- Laboratory of Cardiovascular Proteomics, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, 28029, Spain; CIBER de Enfermedades Cardiovasculares (CIBERCV), Madrid, 28029, Spain
| | - Rocío Peinado
- Department of Molecular Biology, Autonomous University of Madrid, Madrid, 28049, Spain
| | - Filip Lim
- Department of Molecular Biology, Autonomous University of Madrid, Madrid, 28049, Spain
| | - Jesús Vázquez
- Laboratory of Cardiovascular Proteomics, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, 28029, Spain; CIBER de Enfermedades Cardiovasculares (CIBERCV), Madrid, 28029, Spain
| | - Antonio Rodríguez
- Department of Molecular Biology, Autonomous University of Madrid, Madrid, 28049, Spain.
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Udhane V, Maranto C, Hoang DT, Gu L, Erickson A, Devi S, Talati PG, Banerjee A, Iczkowski KA, Jacobsohn K, See WA, Mirtti T, Kilari D, Nevalainen MT. Enzalutamide-Induced Feed-Forward Signaling Loop Promotes Therapy-Resistant Prostate Cancer Growth Providing an Exploitable Molecular Target for Jak2 Inhibitors. Mol Cancer Ther 2019; 19:231-246. [PMID: 31548294 DOI: 10.1158/1535-7163.mct-19-0508] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 08/16/2019] [Accepted: 09/17/2019] [Indexed: 01/03/2023]
Abstract
The second-generation antiandrogen, enzalutamide, is approved for castrate-resistant prostate cancer (CRPC) and targets androgen receptor (AR) activity in CRPC. Despite initial clinical activity, acquired resistance to enzalutamide arises rapidly and most patients develop terminal disease. Previous work has established Stat5 as a potent inducer of prostate cancer growth. Here, we investigated the significance of Jak2-Stat5 signaling in resistance of prostate cancer to enzalutamide. The levels of Jak2 and Stat5 mRNA, proteins and activation were evaluated in prostate cancer cells, xenograft tumors, and clinical prostate cancers before and after enzalutamide therapy. Jak2 and Stat5 were suppressed by genetic knockdown using lentiviral shRNA or pharmacologic inhibitors. Responsiveness of primary and enzalutamide-resistant prostate cancer to pharmacologic inhibitors of Jak2-Stat5 signaling was assessed in vivo in mice bearing prostate cancer xenograft tumors. Patient-derived prostate cancers were tested for responsiveness to Stat5 blockade as second-line treatment after enzalutamide ex vivo in tumor explant cultures. Enzalutamide-liganded AR induces sustained Jak2-Stat5 phosphorylation in prostate cancer leading to the formation of a positive feed-forward loop, where activated Stat5, in turn, induces Jak2 mRNA and protein levels contributing to further Jak2 activation. Mechanistically, enzalutamide-liganded AR induced Jak2 phosphorylation through a process involving Jak2-specific phosphatases. Stat5 promoted prostate cancer growth during enzalutamide treatment. Jak2-Stat5 inhibition induced death of prostate cancer cells and patient-derived prostate cancers surviving enzalutamide treatment and blocked enzalutamide-resistant tumor growth in mice. This work introduces a novel concept of a pivotal role of hyperactivated Jak2-Stat5 signaling in enzalutamide-resistant prostate cancer, which is readily targetable by Jak2 inhibitors in clinical development.
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Affiliation(s)
- Vindhya Udhane
- Department of Pathology, Medical College of Wisconsin Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin.,Department of Pharmacology and Toxicology, Medical College of Wisconsin Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin.,Prostate Cancer Center of Excellence at Medical College of Wisconsin Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Cristina Maranto
- Department of Pathology, Medical College of Wisconsin Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin.,Department of Pharmacology and Toxicology, Medical College of Wisconsin Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin.,Prostate Cancer Center of Excellence at Medical College of Wisconsin Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - David T Hoang
- Department of Cancer Biology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Lei Gu
- Department of Cancer Biology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Andrew Erickson
- Department of Pathology, Medicum, University of Helsinki, Helsinki, Finland.,Institute for Molecular Medicine Finland (FIMM), Helsinki, Finland
| | - Savita Devi
- Department of Pathology, Medical College of Wisconsin Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin.,Department of Pharmacology and Toxicology, Medical College of Wisconsin Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin.,Prostate Cancer Center of Excellence at Medical College of Wisconsin Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Pooja G Talati
- Department of Cancer Biology, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Anjishnu Banerjee
- Prostate Cancer Center of Excellence at Medical College of Wisconsin Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin.,Institute for Health and Equity, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Kenneth A Iczkowski
- Department of Pathology, Medical College of Wisconsin Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin.,Prostate Cancer Center of Excellence at Medical College of Wisconsin Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Kenneth Jacobsohn
- Prostate Cancer Center of Excellence at Medical College of Wisconsin Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin.,Department of Urology and Medical College of Wisconsin Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - William A See
- Prostate Cancer Center of Excellence at Medical College of Wisconsin Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin.,Department of Urology and Medical College of Wisconsin Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Tuomas Mirtti
- Department of Pathology, Medicum, University of Helsinki, Helsinki, Finland.,Institute for Molecular Medicine Finland (FIMM), Helsinki, Finland.,Department of Pathology, HUSLAB and Helsinki University Hospital, Helsinki, Finland
| | - Deepak Kilari
- Prostate Cancer Center of Excellence at Medical College of Wisconsin Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin.,Department of Medicine, Medical College of Wisconsin and Milwaukee VA Medical Center, Milwaukee, Wisconsin
| | - Marja T Nevalainen
- Department of Pathology, Medical College of Wisconsin Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin. .,Department of Pharmacology and Toxicology, Medical College of Wisconsin Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin.,Prostate Cancer Center of Excellence at Medical College of Wisconsin Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin
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24
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Chen KHE, Chen C, Lopez T, Radecki KC, Bustamante K, Lorenson MY, Ge X, Walker AM. Use of a novel camelid-inspired human antibody demonstrates the importance of MMP-14 to cancer stem cell function in the metastatic process. Oncotarget 2018; 9:29431-29444. [PMID: 30034628 PMCID: PMC6047671 DOI: 10.18632/oncotarget.25654] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Accepted: 06/04/2018] [Indexed: 12/12/2022] Open
Abstract
Matrix metalloproteinases (MMPs) are considered excellent targets for cancer therapy because of their important roles in multiple aspects of tumor growth and metastatic spread. However, not all MMPs, or even all activities of specific MMPs, promote cancer. Therefore, there is a need for highly specific inhibitors. Monoclonal antibodies provide the potential for the degree of specificity required, but the isolation of antibodies able to inhibit a specific protease with high selectivity is challenging. Proteolysis specificity lies in recognition of the substrate in or around the active site, which generally forms a concave cleft inaccessible by human IgGs. Inspired by camelid antibodies, which have convex paratopes, we have produced a recombinant human IgG, designated 3A2, which binds in the substrate cleft of MMP-14, inhibiting its activity, but not the activity of highly homologous MMPs. In the 4T1 highly metastatic, syngeneic, orthotopic model of breast cancer, IgG 3A2 markedly inhibited growth of the primary tumor, but more importantly reduced metastatic spread to the lungs and liver by 94%. Stem cells in the tumor population expressed twice as much MMP-14 mRNA as bulk tumor cells. In addition to reducing dissemination of tumor stem cells, as would be expected from inhibition of MMP-14's ability to degrade components of the extracellular matrix, IgG 3A2 also inhibited the ability of individual stem cells to proliferate and produce colonies. We conclude that it is possible to produce antibodies with sufficient specificity for development as therapeutics and that IgG 3A2 has therapeutic potential.
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Affiliation(s)
- Kuan-Hui E Chen
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, CA 92521, USA
| | - Chuan Chen
- Department of Chemical and Environmental Engineering, University of California, Riverside, CA 92521, USA
| | - Tyler Lopez
- Department of Chemical and Environmental Engineering, University of California, Riverside, CA 92521, USA
| | - Kelly C Radecki
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, CA 92521, USA
| | - Karissa Bustamante
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, CA 92521, USA
| | - Mary Y Lorenson
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, CA 92521, USA
| | - Xin Ge
- Department of Chemical and Environmental Engineering, University of California, Riverside, CA 92521, USA
| | - Ameae M Walker
- Division of Biomedical Sciences, School of Medicine, University of California, Riverside, CA 92521, USA
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25
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Nave R, Jodl S, Hoffmann A, Gashaw I, Zollmann F, Berse M, Höchel J, Krätzschmar J, Rohde B. Monoclonal Antibody Against Prolactin Receptor: A Randomized Placebo-Controlled Study Evaluating Safety, Tolerability, and Pharmacokinetics of Repeated Subcutaneous Administrations in Postmenopausal Women. Reprod Sci 2018; 26:523-531. [PMID: 29806538 DOI: 10.1177/1933719118776806] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
BAY 1158061 is a potent monoclonal prolactin (PRL) receptor antibody, blocking PRL receptor (PRLR)-mediated signaling in a noncompetitive manner, which was tested in a randomized, placebo-controlled multiple dose study in postmenopausal women. The objective was to investigate safety, tolerability, pharmacokinetic characteristics, and effects of BAY 1158061 on serum PRL level. The study consisted of 4 parallel groups receiving up to 3 subcutaneous (sc) administrations of BAY 1158061 or placebo in 2 different dosing regimens. Twenty-nine healthy postmenopausal women were randomized and treated with BAY 1158061 or placebo: 30 mg at 14-day interval (7 participants), 60 mg at 28-day interval (8 participants), 90 mg at 14-day interval (7 participants), and placebo (7 participants). To keep the blinding, all randomized participants received sc injections biweekly (14-day interval) on 3 occasions in the lower abdomen. The PRLR antibody showed a favorable safety and tolerability profile in postmenopausal women with no distinct differences in occurrence of adverse events in BAY 1158061 or placebo-treated participants. BAY 1158061 displayed low immunogenicity with low titers of antidrug antibodies and absence of neutralizing antidrug antibodies. Pharmacokinetics were characterized by slow absorption after sc administration with median peak plasma concentrations 7 to 11 days after first dose and about 2-fold accumulation after repeated dosing every 2 weeks. The apparent mean elimination half-life was 9 to 16 days. The PRL concentration-time profiles over 24 hours showed no differences between verum- and placebo-treated participants. Based on the data obtained, BAY 1158061 is considered a good candidate for further development in endometriosis or other PRL-mediated disease conditions.
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Affiliation(s)
| | - Stefan Jodl
- 1 Clinical Sciences, BAYER AG, Berlin, Germany
| | | | | | | | - Matthias Berse
- 3 CRS Clinical Research Services Berlin GmbH, Berlin, Germany
| | | | | | - Beate Rohde
- 1 Clinical Sciences, BAYER AG, Berlin, Germany
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26
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Griffith OL, Chan SR, Griffith M, Krysiak K, Skidmore ZL, Hundal J, Allen JA, Arthur CD, Runci D, Bugatti M, Miceli AP, Schmidt H, Trani L, Kanchi KL, Miller CA, Larson DE, Fulton RS, Vermi W, Wilson RK, Schreiber RD, Mardis ER. Truncating Prolactin Receptor Mutations Promote Tumor Growth in Murine Estrogen Receptor-Alpha Mammary Carcinomas. Cell Rep 2017; 17:249-260. [PMID: 27681435 DOI: 10.1016/j.celrep.2016.08.076] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Revised: 05/27/2016] [Accepted: 08/23/2016] [Indexed: 10/20/2022] Open
Abstract
Estrogen receptor alpha-positive (ERα+) luminal tumors are the most frequent subtype of breast cancer. Stat1(-/-) mice develop mammary tumors that closely recapitulate the biological characteristics of this cancer subtype. To identify transforming events that contribute to tumorigenesis, we performed whole genome sequencing of Stat1(-/-) primary mammary tumors and matched normal tissues. This investigation identified somatic truncating mutations affecting the prolactin receptor (PRLR) in all tumor and no normal samples. Targeted sequencing confirmed the presence of these mutations in precancerous lesions, indicating that this is an early event in tumorigenesis. Functional evaluation of these heterozygous mutations in Stat1(-/-) mouse embryonic fibroblasts showed that co-expression of truncated and wild-type PRLR led to aberrant STAT3 and STAT5 activation downstream of the receptor, cellular transformation in vitro, and tumor formation in vivo. In conclusion, truncating mutations of PRLR promote tumor growth in a model of human ERα+ breast cancer and warrant further investigation.
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Affiliation(s)
- Obi L Griffith
- McDonnell Genome Institute, Washington University School of Medicine, 4444 Forest Park Ave., St. Louis, MO 63108, USA; Department of Medicine, Washington University School of Medicine, 660 S Euclid Ave., St. Louis, MO 63110, USA; Siteman Cancer Center, Washington University School of Medicine, 4921 Parkview Pl., St. Louis, MO 63110, USA
| | - Szeman Ruby Chan
- Department of Pathology and Immunology, Washington University School of Medicine, 660 S Euclid Ave., St. Louis, MO 63110, USA
| | - Malachi Griffith
- McDonnell Genome Institute, Washington University School of Medicine, 4444 Forest Park Ave., St. Louis, MO 63108, USA; Siteman Cancer Center, Washington University School of Medicine, 4921 Parkview Pl., St. Louis, MO 63110, USA; Department of Genetics, Washington University School of Medicine, 660 S Euclid Ave., St. Louis, MO 63110, USA
| | - Kilannin Krysiak
- McDonnell Genome Institute, Washington University School of Medicine, 4444 Forest Park Ave., St. Louis, MO 63108, USA; Department of Medicine, Washington University School of Medicine, 660 S Euclid Ave., St. Louis, MO 63110, USA
| | - Zachary L Skidmore
- McDonnell Genome Institute, Washington University School of Medicine, 4444 Forest Park Ave., St. Louis, MO 63108, USA
| | - Jasreet Hundal
- McDonnell Genome Institute, Washington University School of Medicine, 4444 Forest Park Ave., St. Louis, MO 63108, USA
| | - Julie A Allen
- Department of Pathology and Immunology, Washington University School of Medicine, 660 S Euclid Ave., St. Louis, MO 63110, USA
| | - Cora D Arthur
- Department of Pathology and Immunology, Washington University School of Medicine, 660 S Euclid Ave., St. Louis, MO 63110, USA
| | - Daniele Runci
- Department of Pathology and Immunology, Washington University School of Medicine, 660 S Euclid Ave., St. Louis, MO 63110, USA
| | - Mattia Bugatti
- Section of Pathology, Department of Molecular and Translational Medicine, School of Medicine, University of Brescia, Piazza del Mercato, 15, 25121 Brescia, Italy
| | - Alexander P Miceli
- Department of Pathology and Immunology, Washington University School of Medicine, 660 S Euclid Ave., St. Louis, MO 63110, USA
| | - Heather Schmidt
- McDonnell Genome Institute, Washington University School of Medicine, 4444 Forest Park Ave., St. Louis, MO 63108, USA
| | - Lee Trani
- McDonnell Genome Institute, Washington University School of Medicine, 4444 Forest Park Ave., St. Louis, MO 63108, USA
| | - Krishna-Latha Kanchi
- McDonnell Genome Institute, Washington University School of Medicine, 4444 Forest Park Ave., St. Louis, MO 63108, USA
| | - Christopher A Miller
- McDonnell Genome Institute, Washington University School of Medicine, 4444 Forest Park Ave., St. Louis, MO 63108, USA; Department of Medicine, Washington University School of Medicine, 660 S Euclid Ave., St. Louis, MO 63110, USA
| | - David E Larson
- McDonnell Genome Institute, Washington University School of Medicine, 4444 Forest Park Ave., St. Louis, MO 63108, USA; Department of Genetics, Washington University School of Medicine, 660 S Euclid Ave., St. Louis, MO 63110, USA
| | - Robert S Fulton
- McDonnell Genome Institute, Washington University School of Medicine, 4444 Forest Park Ave., St. Louis, MO 63108, USA; Department of Genetics, Washington University School of Medicine, 660 S Euclid Ave., St. Louis, MO 63110, USA
| | - William Vermi
- Department of Pathology and Immunology, Washington University School of Medicine, 660 S Euclid Ave., St. Louis, MO 63110, USA; Section of Pathology, Department of Molecular and Translational Medicine, School of Medicine, University of Brescia, Piazza del Mercato, 15, 25121 Brescia, Italy
| | - Richard K Wilson
- McDonnell Genome Institute, Washington University School of Medicine, 4444 Forest Park Ave., St. Louis, MO 63108, USA; Department of Medicine, Washington University School of Medicine, 660 S Euclid Ave., St. Louis, MO 63110, USA; Siteman Cancer Center, Washington University School of Medicine, 4921 Parkview Pl., St. Louis, MO 63110, USA; Department of Genetics, Washington University School of Medicine, 660 S Euclid Ave., St. Louis, MO 63110, USA
| | - Robert D Schreiber
- Department of Pathology and Immunology, Washington University School of Medicine, 660 S Euclid Ave., St. Louis, MO 63110, USA; Center for Human Immunology and Immunotherapy Programs, Washington University School of Medicine, 425 S Euclid Ave., St. Louis, MO 63110, USA.
| | - Elaine R Mardis
- McDonnell Genome Institute, Washington University School of Medicine, 4444 Forest Park Ave., St. Louis, MO 63108, USA; Department of Medicine, Washington University School of Medicine, 660 S Euclid Ave., St. Louis, MO 63110, USA; Siteman Cancer Center, Washington University School of Medicine, 4921 Parkview Pl., St. Louis, MO 63110, USA; Department of Genetics, Washington University School of Medicine, 660 S Euclid Ave., St. Louis, MO 63110, USA.
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27
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Goffin V. Prolactin receptor targeting in breast and prostate cancers: New insights into an old challenge. Pharmacol Ther 2017; 179:111-126. [DOI: 10.1016/j.pharmthera.2017.05.009] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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28
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Lan H, Hong P, Li R, L S, Anshan S, Li S, Zheng X. Internal image anti-idiotypic antibody: A new strategy for the development a new category of prolactin receptor (PRLR) antagonist. Mol Immunol 2017; 87:86-93. [DOI: 10.1016/j.molimm.2017.04.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 03/24/2017] [Accepted: 04/05/2017] [Indexed: 10/19/2022]
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29
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Kelly MP, Hickey C, Makonnen S, Coetzee S, Jalal S, Wang Y, Delfino F, Shan J, Potocky TB, Chatterjee I, Andreev J, Kunz A, D'Souza C, Giurleo JT, Nittoli T, Trail PA, Thurston G, Kirshner JR. Preclinical Activity of the Novel Anti-Prolactin Receptor (PRLR) Antibody-Drug Conjugate REGN2878-DM1 in PRLR-Positive Breast Cancers. Mol Cancer Ther 2017; 16:1299-1311. [PMID: 28377489 DOI: 10.1158/1535-7163.mct-16-0839] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 03/21/2017] [Accepted: 03/29/2017] [Indexed: 11/16/2022]
Abstract
The Prolactin Receptor (PRLR) is a type 1 cytokine receptor that is expressed in a subset of breast cancers and may contribute to its pathogenesis. It is relatively overexpressed in approximately 25% of human breast tumors while expressed at low levels in some normal human tissues including the mammary gland. We developed an anti-PRLR antibody-drug conjugate (ADC), to target PRLR-positive breast cancer. REGN2878-DM1 is comprised of a fully human high-affinity function-blocking anti-PRLR IgG1 antibody (REGN2878) conjugated via a noncleavable SMCC linker to the cytotoxic maytansine derivative DM1. Both unconjugated REGN2878 and conjugated REGN2878-DM1 block PRL-mediated activation in vitro and are rapidly internalized into lysosomes. REGN2878-DM1 induces potent cell-cycle arrest and cytotoxicity in PRLR-expressing tumor cell lines. In vivo, REGN2878-DM1 demonstrated significant antigen-specific antitumor activity against breast cancer xenograft models. In addition, REGN2878-DM1 showed additive activity when combined with the antiestrogen agent fulvestrant. These results illustrate promising antitumor activity against PRLR-positive breast cancer xenografts and support the evaluation of anti-PRLR ADCs as potential therapeutic agents in breast cancer. Mol Cancer Ther; 16(7); 1299-311. ©2017 AACR.
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Affiliation(s)
| | - Carlos Hickey
- Regeneron Pharmaceuticals, Inc., Tarrytown, New York
| | | | | | - Sumreen Jalal
- Regeneron Pharmaceuticals, Inc., Tarrytown, New York
| | - Yu Wang
- Regeneron Pharmaceuticals, Inc., Tarrytown, New York
| | - Frank Delfino
- Regeneron Pharmaceuticals, Inc., Tarrytown, New York
| | - Jing Shan
- Regeneron Pharmaceuticals, Inc., Tarrytown, New York
| | | | | | | | - Arthur Kunz
- Regeneron Pharmaceuticals, Inc., Tarrytown, New York
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30
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Prolactin/androgen-inducible carboxypeptidase-D increases with nitrotyrosine and Ki67 for breast cancer progression in vivo, and upregulates progression markers VEGF-C and Runx2 in vitro. Breast Cancer Res Treat 2017; 164:27-40. [PMID: 28364216 DOI: 10.1007/s10549-017-4223-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Accepted: 03/24/2017] [Indexed: 12/19/2022]
Abstract
PURPOSE Carboxypeptidase-D (CPD) cleaves C-terminal arginine (Arg) to produce nitric oxide (NO). Upregulation of CPD and NO by 17β-estradiol, prolactin (PRL), and androgen increases survival of human breast cancer (BCa) cells in vitro. To demonstrate similar events in vivo, CPD, nitrotyrosine (NT, hallmark of NO action), androgen receptor (AR), prolactin receptor (PRLR), and phospho-Stat5a (for activated PRLR) levels were evaluated in benign and malignant human breast tissues, and correlated with cell proliferation (Ki67) and BCa progression (Cullin-3) biomarkers. METHODS Paraffin-embedded breast tissues were analyzed by immunohistochemistry (IHC). BCa progression markers in human MCF-7 and T47D BCa cell lines treated with NO donor SIN-1 or PRL, ±CPD inhibitors were analyzed by RT-qPCR and immunoblotting. RESULTS IHC showed progressive increases in CPD, NT, Ki67, and Cullin-3 from low levels in benign tissues to high levels in ductal carcinoma in situ, low-grade, high-grade, and triple-negative BCa. CPD and NT staining were closely associated, implicating CPD in NO production. Phospho-Stat5a increased significantly from benign to high-grade BCa and was mostly nuclear. AR and PRLR were abundant in benign breast and BCa, including triple-negative tumors. SIN-1 and PRL increased VEGF-C and Runx2, but not Cullin-3, in BCa cell lines. PRL induction of VEGF-C and Runx2 was inhibited partly by CPD inhibitors, implicating NO, produced by PRL-regulated CPD, in BCa progression. CONCLUSIONS The CPD-Arg-NO pathway contributes to BCa progression in vitro and in vivo. PRL/androgen activation of the pathway support combined AR and PRLR blockade as an additional therapy for BCa.
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31
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Cui H, Ma YZ, Wang Y, Song M, Zhang H. Development of a new anti-prolactin receptor (PRLR) antibody, F56, which can serve as a PRLR antagonist. Int J Biol Macromol 2016; 95:1223-1227. [PMID: 27829125 DOI: 10.1016/j.ijbiomac.2016.11.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 10/20/2016] [Accepted: 11/03/2016] [Indexed: 10/20/2022]
Abstract
In this work, we developed a new prolactin receptor (PRLR) antagonist using the hybridoma technique. A series of monoclonal antibodies against prolactin receptor (PRLR) was prepared, from which we characterized and selected one anti-PRLR antibody, F56. Epitome mapping showed that F56 and prolactin (PRL) share a common binding epitope on PRLR, and therefore, F56 could compete with prolactin (PRL) for binding to PRLR. Subsequent experiments indicated that F56 could effectively neutralize PRLR-mediated intracellular signalling molecules, such as signal transducer and activator of transcription (STAT) and extracellular signal-regulated kinase-1 and kinase 2 (ERK1/2), either by endogenously expressed PRLR or in a cell model transfected with PRLR. In addition, further experiments showed that F56 could effectively inhibit PRL-induced cell proliferation. The current study suggests that F56 has potential applications in PRLR-related studies.
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Affiliation(s)
- Huanzhong Cui
- College of Animal Science and Technology Jilin Agricultural University, Changchun, Jilin Xincheng street 2888, Changchun 130118, PR China.
| | - Yun Zhi Ma
- College of Animal Science and Veterinary Medicine, Jilin University, PR China
| | - Yanrong Wang
- Henan University of Science and Technology, Xinxiang, Henan province, 471023, PR China
| | - Meng Song
- College of Animal Science and Technology Jilin Agricultural University, Changchun, Jilin Xincheng street 2888, Changchun 130118, PR China
| | - Hui Zhang
- College of Animal Science and Technology Jilin Agricultural University, Changchun, Jilin Xincheng street 2888, Changchun 130118, PR China
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32
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Agarwal N, Machiels JP, Suárez C, Lewis N, Higgins M, Wisinski K, Awada A, Maur M, Stein M, Hwang A, Mosher R, Wasserman E, Wu G, Zhang H, Zieba R, Elmeliegy M. Phase I Study of the Prolactin Receptor Antagonist LFA102 in Metastatic Breast and Castration-Resistant Prostate Cancer. Oncologist 2016; 21:535-6. [PMID: 27091421 PMCID: PMC4861370 DOI: 10.1634/theoncologist.2015-0502] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Accepted: 01/11/2016] [Indexed: 11/17/2022] Open
Abstract
LESSONS LEARNED Despite evidence for a role for prolactin signaling in breast and prostate tumorigenesis, a prolactin receptor-binding monoclonal antibody has not produced clinical efficacy.Increased serum prolactin levels may be a biomarker for prolactin receptor inhibition.Results from the pharmacokinetic and pharmacodynamics (PD) studies suggest that inappropriately long dosing intervals and insufficient exposure to LFA102 may have resulted in lack of antitumor efficacy.Based on preclinical data, combination therapy of LFA102 with those novel agents targeting hormonal pathways in metastatic castration-resistant prostate cancer and metastatic breast cancer is promising.Given the PD evidence of prolactin receptor blockade by LFA102, this drug has the potential to be used in conditions such as hyperprolactinemia that are associated with high prolactin levels. BACKGROUND Prolactin receptor (PRLR) signaling is implicated in breast and prostate cancer. LFA102, a humanized monoclonal antibody (mAb) that binds to and inhibits the PRLR, has exhibited promising preclinical antitumor activity. METHODS Patients with PRLR-positive metastatic breast cancer (MBC) or metastatic castration-resistant prostate cancer (mCRPC) received doses of LFA102 at 3-60 mg/kg intravenously once every 4 weeks. Objectives were to determine the maximum tolerated dose (MTD) and/or recommended dose for expansion (RDE) to investigate the safety/tolerability of LFA102 and to assess pharmacokinetics (PK), pharmacodynamics (PD), and antitumor activity. RESULTS A total of 73 patients were enrolled at 5 dose levels. The MTD was not reached because of lack of dose-limiting toxicities. The RDE was established at 60 mg/kg based on PK and PD analysis and safety data. The most common all-cause adverse events (AEs) were fatigue (44%) and nausea (33%) regardless of relationship. Grade 3/4 AEs reported to be related to LFA102 occurred in 4% of patients. LFA102 exposure increased approximately dose proportionally across the doses tested. Serum prolactin levels increased in response to LFA102 administration, suggesting its potential as a biomarker for PRLR inhibition. No antitumor activity was detected. CONCLUSION Treatment with LFA102 was safe and well tolerated, but did not show antitumor activity as monotherapy at the doses tested.
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Affiliation(s)
- Neeraj Agarwal
- Huntsman Cancer Institute, Division of Medical Oncology, Department of Medicine, University of Utah, Salt Lake City, Utah, USA
| | - Jean-Pascal Machiels
- Roi Albert II Institute, Medical Oncology Service, University Clinic Saint Luc and Institute of Experimental and Clinical Research (Pôle Molecular Imaging, Radiotherapy & Oncology), Catholic University of Louvain, Brussels, Belgium
| | - Cristina Suárez
- Vall d'Hebron University Hospital, Vall d'Hebron Institute of Oncology, Barcelona, Spain
| | - Nancy Lewis
- Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Michaela Higgins
- Harvard Medical School and Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Kari Wisinski
- University of Wisconsin Carbone Cancer Center, Madison, Wisconsin, USA
| | | | - Michela Maur
- Oncology Unit, Department of Oncology, Hematology and Respiratory Disease, University Hospital Policlinico of Modena, Modena, Italy
| | - Mark Stein
- Rutgers Cancer Institute of New Jersey, New Brunswick, New Jersey, USA
| | - Andy Hwang
- Novartis Pharmaceutical Corporation, East Hanover, New Jersey, USA
| | | | | | - Gang Wu
- Novartis Pharmaceutical Corporation, East Hanover, New Jersey, USA
| | - Hefei Zhang
- Novartis Pharmaceutical Corporation, East Hanover, New Jersey, USA
| | - Renata Zieba
- Novartis Pharmaceutical Corporation, East Hanover, New Jersey, USA
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Otto C, Särnefält A, Ljungars A, Wolf S, Rohde-Schulz B, Fuchs I, Schkoldow J, Mattsson M, Vonk R, Harrenga A, Freiberg C. A Neutralizing Prolactin Receptor Antibody Whose In Vivo Application Mimics the Phenotype of Female Prolactin Receptor-Deficient Mice. Endocrinology 2015; 156:4365-73. [PMID: 26284426 DOI: 10.1210/en.2015-1277] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The prolactin receptor (PRLR) has been implicated in a variety of physiological processes (lactation, reproduction) and diseases (breast cancer, autoimmune diseases). Prolactin synthesis in the pituitary and extrapituitary sites is regulated by different promoters. Dopamine receptor agonists such as bromocriptine can only interfere with pituitary prolactin synthesis and thus do not induce a complete blockade of PRLR signaling. Here we describe the identification of a human monoclonal antibody 005-C04 that blocks PRLR-mediated signaling at nanomolar concentrations in vitro. In contrast to a negative control antibody, the neutralizing PRLR antibody 005-C04 inhibits signal transducer and activator of transcription 5 phosphorylation in T47D cells and proliferation of BaF3 cells stably expressing murine or human PRLRs in a dose-dependent manner. In vivo application of this new function-blocking PRLR antibody reflects the phenotype of PRLR-deficient mice. After antibody administration female mice become infertile in a reversible manner. In lactating dams, the antibody induces mammary gland involution and negatively interferes with lactation capacity as evidenced by reduced milk protein expression in mammary glands and impaired litter weight gain. Antibody-mediated blockade of the PRLR in vivo stimulates hair regrowth in female mice. Compared with peptide-derived PRLR antagonists, the PRLR antibody 005-C04 exhibits several advantages such as higher potency, noncompetitive inhibition of PRLR signaling, and a longer half-life, which allows its use as a tool compound also in long-term in vivo studies. Therefore, we suggest that this antibody will help to further our understanding of the role of auto- and paracrine PRLR signaling in health and disease.
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Affiliation(s)
- Christiane Otto
- TRG Oncology and Gynaecological Therapy (C.O., S.W., B.R.-S., I.F., J.S.), and Department of Research and Clinical Sciences Statistics (R.V.), Bayer Pharma AG, 13342 Berlin, Germany; Department of Protein Engineering (A.S., A.L., M.M.), BioInvent International AB, Soelvegatan 41, SE-223 70 Lund, Sweden; and Department of Global Biologics (A.H., C.F.), Bayer Pharma AG, Aprather Weg 18a, 42113 Wuppertal, Germany
| | - Anna Särnefält
- TRG Oncology and Gynaecological Therapy (C.O., S.W., B.R.-S., I.F., J.S.), and Department of Research and Clinical Sciences Statistics (R.V.), Bayer Pharma AG, 13342 Berlin, Germany; Department of Protein Engineering (A.S., A.L., M.M.), BioInvent International AB, Soelvegatan 41, SE-223 70 Lund, Sweden; and Department of Global Biologics (A.H., C.F.), Bayer Pharma AG, Aprather Weg 18a, 42113 Wuppertal, Germany
| | - Anne Ljungars
- TRG Oncology and Gynaecological Therapy (C.O., S.W., B.R.-S., I.F., J.S.), and Department of Research and Clinical Sciences Statistics (R.V.), Bayer Pharma AG, 13342 Berlin, Germany; Department of Protein Engineering (A.S., A.L., M.M.), BioInvent International AB, Soelvegatan 41, SE-223 70 Lund, Sweden; and Department of Global Biologics (A.H., C.F.), Bayer Pharma AG, Aprather Weg 18a, 42113 Wuppertal, Germany
| | - Siegmund Wolf
- TRG Oncology and Gynaecological Therapy (C.O., S.W., B.R.-S., I.F., J.S.), and Department of Research and Clinical Sciences Statistics (R.V.), Bayer Pharma AG, 13342 Berlin, Germany; Department of Protein Engineering (A.S., A.L., M.M.), BioInvent International AB, Soelvegatan 41, SE-223 70 Lund, Sweden; and Department of Global Biologics (A.H., C.F.), Bayer Pharma AG, Aprather Weg 18a, 42113 Wuppertal, Germany
| | - Beate Rohde-Schulz
- TRG Oncology and Gynaecological Therapy (C.O., S.W., B.R.-S., I.F., J.S.), and Department of Research and Clinical Sciences Statistics (R.V.), Bayer Pharma AG, 13342 Berlin, Germany; Department of Protein Engineering (A.S., A.L., M.M.), BioInvent International AB, Soelvegatan 41, SE-223 70 Lund, Sweden; and Department of Global Biologics (A.H., C.F.), Bayer Pharma AG, Aprather Weg 18a, 42113 Wuppertal, Germany
| | - Iris Fuchs
- TRG Oncology and Gynaecological Therapy (C.O., S.W., B.R.-S., I.F., J.S.), and Department of Research and Clinical Sciences Statistics (R.V.), Bayer Pharma AG, 13342 Berlin, Germany; Department of Protein Engineering (A.S., A.L., M.M.), BioInvent International AB, Soelvegatan 41, SE-223 70 Lund, Sweden; and Department of Global Biologics (A.H., C.F.), Bayer Pharma AG, Aprather Weg 18a, 42113 Wuppertal, Germany
| | - Jenny Schkoldow
- TRG Oncology and Gynaecological Therapy (C.O., S.W., B.R.-S., I.F., J.S.), and Department of Research and Clinical Sciences Statistics (R.V.), Bayer Pharma AG, 13342 Berlin, Germany; Department of Protein Engineering (A.S., A.L., M.M.), BioInvent International AB, Soelvegatan 41, SE-223 70 Lund, Sweden; and Department of Global Biologics (A.H., C.F.), Bayer Pharma AG, Aprather Weg 18a, 42113 Wuppertal, Germany
| | - Mikael Mattsson
- TRG Oncology and Gynaecological Therapy (C.O., S.W., B.R.-S., I.F., J.S.), and Department of Research and Clinical Sciences Statistics (R.V.), Bayer Pharma AG, 13342 Berlin, Germany; Department of Protein Engineering (A.S., A.L., M.M.), BioInvent International AB, Soelvegatan 41, SE-223 70 Lund, Sweden; and Department of Global Biologics (A.H., C.F.), Bayer Pharma AG, Aprather Weg 18a, 42113 Wuppertal, Germany
| | - Richardus Vonk
- TRG Oncology and Gynaecological Therapy (C.O., S.W., B.R.-S., I.F., J.S.), and Department of Research and Clinical Sciences Statistics (R.V.), Bayer Pharma AG, 13342 Berlin, Germany; Department of Protein Engineering (A.S., A.L., M.M.), BioInvent International AB, Soelvegatan 41, SE-223 70 Lund, Sweden; and Department of Global Biologics (A.H., C.F.), Bayer Pharma AG, Aprather Weg 18a, 42113 Wuppertal, Germany
| | - Axel Harrenga
- TRG Oncology and Gynaecological Therapy (C.O., S.W., B.R.-S., I.F., J.S.), and Department of Research and Clinical Sciences Statistics (R.V.), Bayer Pharma AG, 13342 Berlin, Germany; Department of Protein Engineering (A.S., A.L., M.M.), BioInvent International AB, Soelvegatan 41, SE-223 70 Lund, Sweden; and Department of Global Biologics (A.H., C.F.), Bayer Pharma AG, Aprather Weg 18a, 42113 Wuppertal, Germany
| | - Christoph Freiberg
- TRG Oncology and Gynaecological Therapy (C.O., S.W., B.R.-S., I.F., J.S.), and Department of Research and Clinical Sciences Statistics (R.V.), Bayer Pharma AG, 13342 Berlin, Germany; Department of Protein Engineering (A.S., A.L., M.M.), BioInvent International AB, Soelvegatan 41, SE-223 70 Lund, Sweden; and Department of Global Biologics (A.H., C.F.), Bayer Pharma AG, Aprather Weg 18a, 42113 Wuppertal, Germany
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Thomas LN, Merrimen J, Bell DG, Rendon R, Too CKL. Prolactin- and testosterone-induced carboxypeptidase-D correlates with increased nitrotyrosines and Ki67 in prostate cancer. Prostate 2015. [PMID: 26202060 DOI: 10.1002/pros.23054] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND Carboxypeptidase-D (CPD) cleaves C-terminal arginine for conversion to nitric oxide (NO) by nitric oxide synthase (NOS). Prolactin (PRL) and androgens stimulate CPD gene transcription and expression, which increases intracellular production of NO to promote viability of prostate cancer (PCa) cells in vitro. The current study evaluated whether hormonal upregulation of CPD and NO promote PCa cell viabilty in vivo, by correlating changes in expression of CPD and nitrotyrosine residues (products of NO action) with proliferation marker Ki67 and associated proteins during PCa development and progression. METHODS Fresh prostate tissues, obtained from 40 men with benign prostatic hyperplasia (BPH) or PCa, were flash-frozen at the time of surgery and used for RT-qPCR analysis of CPD, androgen receptor (AR), PRL receptor (PRLR), eNOS, and Ki67 levels. Archival paraffin-embedded tissues from 113 men with BPH or PCa were used for immunohistochemical (IHC) analysis of CPD, nitrotyrosines, phospho-Stat5 (for activated PRLR), AR, eNOS/iNOS, and Ki67. RESULTS RT-qPCR and IHC analyses showed strong AR and PRLR expression in benign and malignant prostates. CPD mRNA levels increased ∼threefold in PCa compared to BPH, which corresponded to a twofold increase in Ki67 mRNA levels. IHC analysis showed a progressive increase in CPD from 11.4 ± 2.1% in benign to 21.8 ± 3.2% in low-grade (P = 0.007), 40.7 ± 4.0% in high-grade (P < 0.0001) and 50.0 ± 9.5% in castration-recurrent PCa (P < 0.0001). Immunostaining for nitrotyrosines and Ki67 mirrored these increases during PCa progression. CPD, nitrotyrosines, and Ki67 tended to co-localize, as did phospho-Stat5. CONCLUSIONS CPD, nitrotyrosine, and Ki67 levels were higher in PCa than in benign and tended to co-localize, along with phospho-Stat5. The strong correlation in expression of these proteins in benign and malignant prostate tissues, combined with abundant AR and PRLR, supports in vitro evidence that the CPD-Arg-NO pathway is involved in the regulation of PCa cell proliferation. It further highlights a role for PRL in the development and progression of PCa.
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Affiliation(s)
- Lynn N Thomas
- Department of Biochemistry and Molecular Biology, Dalhousie University, Halifax, NS, Canada
| | - Jennifer Merrimen
- Department of Pathology, Dalhousie University, Halifax, NS, Canada
- Department of Urology, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada
| | - David G Bell
- Department of Urology, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada
| | - Ricardo Rendon
- Department of Urology, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada
| | - Catherine K L Too
- Department of Biochemistry and Molecular Biology, Dalhousie University, Halifax, NS, Canada
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Harvey S, Martínez-Moreno CG, Luna M, Arámburo C. Autocrine/paracrine roles of extrapituitary growth hormone and prolactin in health and disease: An overview. Gen Comp Endocrinol 2015; 220:103-11. [PMID: 25448258 DOI: 10.1016/j.ygcen.2014.11.004] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Accepted: 11/03/2014] [Indexed: 02/07/2023]
Abstract
Growth hormone (GH) and prolactin (PRL) are both endocrines that are synthesized and released from the pituitary gland into systemic circulation. Both are therefore hormones and both have numerous physiological roles mediated through a myriad of target sites and both have pathophysiological consequences when present in excess or deficiency. GH or PRL gene expression is not, however, confined to the anterior pituitary gland and it occurs widely in many of their central and peripheral sites of action. This may reflect "leaky gene" phenomena and the fact that all cells have the potential to express every gene that is present in their genome. However, the presence of GH or PRL receptors in these extrapituitary sites of GH and PRL production suggests that they are autocrine or paracrine sites of GH and PRL action. These local actions often occur prior to the ontogeny of pituitary somatotrophs and lactotrophs and they may complement or differ from the roles of their pituitary counterparts. Many of these local actions are also of physiological significance, since they are impaired by a blockade of local GH or PRL production or by an antagonism of local GH or PRL action. These local actions may also be of pathophysiological significance, since autocrine or paracrine actions of GH and PRL are thought to be causally involved in a number of disease states, particularly in cancer. Autocrine GH for instance, is thought to be more oncogenic than pituitary GH and selective targeting of the autocrine moiety may provide a therapeutic approach to prevent tumor progression. In summary, GH and PRL are not just endocrine hormones, as they have autocrine and/or paracrine roles in health and disease.
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Affiliation(s)
- Steve Harvey
- Department of Physiology, University of Alberta, Edmonton T6G 2H7, Canada.
| | | | - Maricela Luna
- Departamento de Neurobiología, Celular y Molecular Instituto de Neurobiología, Universidad Nacional Autónoma de México, Querétaro, Qro. 76230, Mexico
| | - Carlos Arámburo
- Departamento de Neurobiología, Celular y Molecular Instituto de Neurobiología, Universidad Nacional Autónoma de México, Querétaro, Qro. 76230, Mexico
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Goffin V, Touraine P. The prolactin receptor as a therapeutic target in human diseases: browsing new potential indications. Expert Opin Ther Targets 2015; 19:1229-44. [PMID: 26063597 DOI: 10.1517/14728222.2015.1053209] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
INTRODUCTION Prolactin (PRL) signaling has emerged as a relevant target in breast and prostate cancers. This has encouraged various laboratories to develop compounds targeting the PRL receptor (PRLR). As the latter is widely distributed, it is timely to address whether other conditions could also benefit from such inhibitors. AREAS COVERED The authors briefly overview the two classes of PRLR blockers, which involve: i) PRL-core based analogs that have been validated as competitive antagonists in various preclinical models, and ii) anti-PRLR neutralizing antibodies that are currently in clinical Phase I for advanced breast and prostate cancers. The main purpose of this review is to discuss the multiple organs/diseases that may be considered as potential targets/indications for such inhibitors. This is done in light of reports suggesting that PRLR expression/signaling is increased in disease, and/or that systemic or locally elevated PRL levels correlate with (or promote) organ pathogenesis. EXPERT OPINION The two immediate challenges in the field are i) to provide the scientific community with potent anti-prolactin receptor antibodies to map prolactin receptor expression in target organs, and ii) to take advantage of the availability of functionally validated PRLR blockers to establish the relevance of these potential indications in humans.
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Affiliation(s)
- Vincent Goffin
- Research Director at Inserm, Head of the 'PRL/GH Pathophysiology: Translational Approaches' Laboratory,University Paris Descartes, Institut Necker Enfants Malades (INEM), Inserm Unit 1151, Faculté de Médecine Paris Descartes , Bâtiment Leriche, 14 Rue Maria Helena Vieira Da Silva, CS61431, 75993 Paris Cedex 14 , France +33 1 72 60 63 68 +33 1 72 60 64 01 ;
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Abstract
Prolactin is a hormone that is mainly secreted by lactotroph cells of the anterior pituitary gland, and is involved in many biological processes including lactation and reproduction. Animal models have provided insights into the biology of prolactin proteins and offer compelling evidence that the different prolactin isoforms each have independent biological functions. The major isoform, 23 kDa prolactin, acts via its membrane receptor, the prolactin receptor (PRL-R), which is a member of the haematopoietic cytokine superfamily and for which the mechanism of activation has been deciphered. The 16 kDa prolactin isoform is a cleavage product derived from native prolactin, which has received particular attention as a result of its newly described inhibitory effects on angiogenesis and tumorigenesis. The discovery of multiple extrapituitary sites of prolactin secretion also increases the range of known functions of this hormone. This Review summarizes current knowledge of the biology of prolactin and its receptor, as well as its physiological and pathological roles. We focus on the role of prolactin in human pathophysiology, particularly the discovery of the mechanism underlying infertility associated with hyperprolactinaemia and the identification of the first mutation in human PRLR.
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Affiliation(s)
- Valérie Bernard
- Inserm U1185, 63 rue Gabriel Péri, 94276 Le Kremlin-Bicêtre Cedex, France
| | - Jacques Young
- Hôpital Bicêtre, Service d'Endocrinologie et des Maladies de la Reproduction, 78 rue du Général Leclerc 94275 Le Kremlin-Bicêtre Cedex, France
| | - Philippe Chanson
- Hôpital Bicêtre, Service d'Endocrinologie et des Maladies de la Reproduction, 78 rue du Général Leclerc 94275 Le Kremlin-Bicêtre Cedex, France
| | - Nadine Binart
- Inserm U1185, 63 rue Gabriel Péri, 94276 Le Kremlin-Bicêtre Cedex, France
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Faje AT, Klibanski A. The treatment of hyperprolactinemia in postmenopausal women with prolactin-secreting microadenomas: cons. Endocrine 2015; 48:79-82. [PMID: 24888765 DOI: 10.1007/s12020-014-0308-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Accepted: 05/16/2014] [Indexed: 10/25/2022]
Affiliation(s)
- Alexander T Faje
- BUL 457, Neuroendocrine Unit, Massachusetts General Hospital and Harvard Medical School, 55 Fruit Street, Boston, MA, 02114, USA
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Prolactin-Induced Prostate Tumorigenesis. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2015; 846:221-42. [DOI: 10.1007/978-3-319-12114-7_10] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Yang N, Liu C, Peck AR, Girondo MA, Yanac AF, Tran TH, Utama FE, Tanaka T, Freydin B, Chervoneva I, Hyslop T, Kovatich AJ, Hooke JA, Shriver CD, Rui H. Prolactin-Stat5 signaling in breast cancer is potently disrupted by acidosis within the tumor microenvironment. Breast Cancer Res 2014; 15:R73. [PMID: 24004716 PMCID: PMC3978581 DOI: 10.1186/bcr3467] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Accepted: 07/12/2013] [Indexed: 02/07/2023] Open
Abstract
INTRODUCTION Emerging evidence in estrogen receptor-positive breast cancer supports the notion that prolactin-Stat5 signaling promotes survival and maintenance of differentiated luminal cells, and loss of nuclear tyrosine phosphorylated Stat5 (Nuc-pYStat5) in clinical breast cancer is associated with increased risk of antiestrogen therapy failure. However, the molecular mechanisms underlying loss of Nuc-pYStat5 in breast cancer remain poorly defined. METHODS We investigated whether moderate extracellular acidosis of pH 6.5 to 6.9 frequently observed in breast cancer inhibits prolactin-Stat5 signaling, using in vitro and in vivo experimental approaches combined with quantitative immunofluorescence protein analyses to interrogate archival breast cancer specimens. RESULTS Moderate acidosis at pH 6.8 potently disrupted signaling by receptors for prolactin but not epidermal growth factor, oncostatin M, IGF1, FGF or growth hormone. In breast cancer specimens there was mutually exclusive expression of Nuc-pYStat5 and GLUT1, a glucose transporter upregulated in glycolysis-dependent carcinoma cells and an indirect marker of lactacidosis. Mutually exclusive expression of GLUT1 and Nuc-pYStat5 occurred globally or regionally within tumors, consistent with global or regional acidosis. All prolactin-induced signals and transcripts were suppressed by acidosis, and the acidosis effect was rapid and immediately reversible, supporting a mechanism of acidosis disruption of prolactin binding to receptor. T47D breast cancer xenotransplants in mice displayed variable acidosis (pH 6.5 to 6.9) and tumor regions with elevated GLUT1 displayed resistance to exogenous prolactin despite unaltered levels of prolactin receptors and Stat5. CONCLUSIONS Moderate extracellular acidosis effectively blocks prolactin signaling in breast cancer. We propose that acidosis-induced prolactin resistance represents a previously unrecognized mechanism by which breast cancer cells may escape homeostatic control.
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Neradugomma NK, Sainathan S, Baranda J, Subramaniam D, Anant S. Role of Prolactin and Its Receptor in Colorectal Cancer. CURRENT COLORECTAL CANCER REPORTS 2014. [DOI: 10.1007/s11888-014-0248-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Navari M, Zare M, Javanmardi M, Asadi-Ghalehni M, Modjtahedi H, Rasaee MJ. Epitope mapping of epidermal growth factor receptor (EGFR) monoclonal antibody and induction of growth-inhibitory polyclonal antibodies by vaccination with EGFR mimotope. Immunopharmacol Immunotoxicol 2014; 36:309-15. [PMID: 25070131 DOI: 10.3109/08923973.2014.945127] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
One of the proposed approaches in cancer therapy is to induce and direct the patient's own immune system against cancer cells. In this study, we determined the epitope mapping of the rat anti-human epidermal growth factor receptor (EGFR) monoclonal antibody ICR-62 using a phage display of random peptide library and identified a 12 amino acids peptide, which was recognized as a mimotope. The peptide was synthesized and conjugated to bovine serum albumin (BSA) as carrier protein (P-BSA). We have shown that ICR-62 can react specifically with P-BSA as well as native EGFR. Two rabbits were immunized either by BSA or P-BSA and the rabbits IgGs were purified and examined for binding to the antigens, mimotope and the EGFR protein purified from the EGFR overexpressing A431 cell line. We showed that the rabbit IgG generated against the mimotope is capable of inhibiting the growth of A431 cells by 15%, but does not have any effect on the growth of EGFR-negative MDA-MB-453 cell line in vitro. Our results support the need for further investigations on the potential of vaccination with either mimotope of the EGFR or epitope displayed on the surface of phage particles for use in active immunotherapy of cancer.
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Affiliation(s)
- Mohsen Navari
- Department of Medical Biotechnology, School of Medical Sciences, Tarbiat Modares University , Tehran , Islamic Republic of Iran and
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Prolactin receptor attenuation induces zinc pool redistribution through ZnT2 and decreases invasion in MDA-MB-453 breast cancer cells. Exp Cell Res 2014; 321:190-200. [DOI: 10.1016/j.yexcr.2013.12.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2013] [Revised: 12/01/2013] [Accepted: 12/03/2013] [Indexed: 11/15/2022]
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Walker SR, Xiang M, Frank DA. Distinct roles of STAT3 and STAT5 in the pathogenesis and targeted therapy of breast cancer. Mol Cell Endocrinol 2014; 382:616-621. [PMID: 23531638 PMCID: PMC3732813 DOI: 10.1016/j.mce.2013.03.010] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2013] [Accepted: 03/14/2013] [Indexed: 02/04/2023]
Abstract
The transcription factors STAT3 and STAT5 play important roles in the regulation of mammary gland function during pregnancy, lactation, and involution. Given that STAT3 and STAT5 regulate genes involved in proliferation and survival, it is not surprising that inappropriate activation of STAT3 and STAT5 occurs commonly in breast cancer. Although these proteins are structurally similar, they have divergent and opposing effects on gene expression and cellular phenotype. Notably, when STAT5 and STAT3 are activated simultaneously, STAT5 has a dominant effect, and leads to decreased proliferation and increased sensitivity to cell death. Similarly, in breast cancer, activation of both STAT5 and STAT3 is associated with longer patient survival than activation of STAT3 alone. Pharmacological inhibitors of STAT3 and STAT5 are being developed for cancer therapy, though understanding the activation state and functional interaction of STAT3 and STAT5 in a patient's tumor may be critical for the optimal use of this strategy.
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Affiliation(s)
- Sarah R Walker
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA; Department of Medicine, Brigham and Women's Hospital, Boston, MA, USA; Department of Medicine, Harvard Medical School, Boston, MA, USA
| | - Michael Xiang
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA; Department of Medicine, Brigham and Women's Hospital, Boston, MA, USA; Department of Medicine, Harvard Medical School, Boston, MA, USA
| | - David A Frank
- Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA, USA; Department of Medicine, Brigham and Women's Hospital, Boston, MA, USA; Department of Medicine, Harvard Medical School, Boston, MA, USA.
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O'Leary KA, Jallow F, Rugowski DE, Sullivan R, Sinkevicius KW, Greene GL, Schuler LA. Prolactin activates ERα in the absence of ligand in female mammary development and carcinogenesis in vivo. Endocrinology 2013; 154:4483-92. [PMID: 24064365 PMCID: PMC3836081 DOI: 10.1210/en.2013-1533] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Resistance of estrogen receptor positive (ERα+) breast cancers to antiestrogens is a major factor in the mortality of this disease. Although activation of ERα in the absence of ligand is hypothesized to contribute to this resistance, the potency of this mechanism in vivo is not clear. Epidemiologic studies have strongly linked prolactin (PRL) to both development of ERα+ breast cancer and resistance to endocrine therapies. Here we employed genetically modified mouse models to examine the ability of PRL and cross talk with TGFα to activate ERα, using a mutated ERα, ERα(G525L), which is refractory to endogenous estrogens. We demonstrate that PRL promotes pubertal ERα-dependent mammary ductal elongation and gene expression in the absence of estrogen, which are abrogated by the antiestrogen, ICI 182,780 (ICI). PRL and TGFα together reduce sensitivity to estrogen, and 30% of their combined stimulation of ductal proliferation is inhibited by ICI, implicating ligand-independent activation of ERα as a component of their interaction. However, PRL/TGFα-induced heterogeneous ERα+ tumors developed more rapidly in the presence of ICI and contained altered transcripts for surface markers associated with epithelial subpopulations and increased signal transducer and activator of transcription 5b expression. Together, these data support strong interactions between PRL and estrogen on multiple levels. Ligand-independent activation of ERα suggests that PRL may contribute to resistance to antiestrogen therapies. However, these studies also underscore ERα-mediated moderation of tumor phenotype. In light of the high expression of PRL receptors in ERα+ cancers, understanding the actions of PRL and cross talk with other oncogenic factors and ERα itself has important implications for therapeutic strategies.
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Affiliation(s)
- Kathleen A O'Leary
- Department of Comparative Biosciences, 2015 Linden Drive, University of Wisconsin-Madison, Madison, WI 53706.
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Abstract
PURPOSE OF REVIEW Animals born with a deficiency in the cell surface receptor for growth hormone (GH) have a significantly reduced risk of developing cancer. Conversely, increased expression levels of GH and the GH receptor (GHR) are detectable in a variety of different human cancers. Here we discuss recent literature contributing to our understanding of the field. RECENT FINDINGS In addition to animal evidence, studies of individuals with Laron syndrome suggest that congenital GHR deficiency may also protect humans against cancer. GH expression in certain malignancies is correlated with clinicohistopathological parameters and may contribute the therapeutic resistance. Other recent studies have identified novel aspects of the GH signal transduction pathway, including receptor crosstalk and the involvement of microRNA in endocrine regulation of GH. SUMMARY Substantial evidence suggests the GH/insulin-like growth factor-1 axis initiates and promotes progression of cancer. However, important questions remain unanswered regarding the therapeutic utility of GH or GHR antagonism in cancer. Further clinical studies regarding the clinical association of GH expression with human malignancies and translational studies investigating GHR antagonism in animal models of human cancer are critical.
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Affiliation(s)
- Jo K Perry
- Liggins Institute, University of Auckland, Auckland, New Zealand.
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Ferraris J, Bernichtein S, Pisera D, Goffin V. Use of prolactin receptor antagonist to better understand prolactin regulation of pituitary homeostasis. Neuroendocrinology 2013; 98:171-9. [PMID: 23969780 DOI: 10.1159/000354701] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Accepted: 07/19/2013] [Indexed: 11/19/2022]
Abstract
The anterior pituitary is permanently regulated by processes of apoptosis and proliferation in order to maintain tissue homeostasis. Several factors have been implicated in this regulation and lately, prolactin (PRL) has been included into that list. However, since PRL is secreted by anterior pituitary lactotropes, the actual outcome of its autocrine/paracrine actions on pituitary cells has remained difficult to assess. The availability of the pure PRL receptor antagonist Del1-9-G129R-hPRL has been helpful to circumvent this problem. While PRL has been traditionally associated with increased cell proliferation, recent studies revealed that this hormone actually induces apoptosis and decreases proliferation of anterior pituitary cells, by mechanisms involving the PRL receptor. The aim of this short review is to overview our current understanding of the regulation of pituitary homeostasis by PRL. Moreover, studies involving Del1-9-G129R-hPRL have helped anticipate to what extent future treatments involving PRL receptor inhibitors may interfere with processes regulated by PRL at the central level.
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Affiliation(s)
- Jimena Ferraris
- Institute of Biomedical Research, School of Medicine, University of Buenos Aires-CONICET, Buenos Aires, Argentina
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