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Jaiswal SK, Fedkenheuer K, Khamar R, Tan H, Gotea V, Raj S, Fedkenheuer M, Elkahloun A, Zhao M, Jenkins LM, Annunziata CM, Elnitski L. The Megacomplex protects ER-alpha from degradation by Fulvestrant in epithelial ovarian cancer. Cancer Lett 2024:217129. [PMID: 39048045 DOI: 10.1016/j.canlet.2024.217129] [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: 01/21/2024] [Revised: 07/03/2024] [Accepted: 07/19/2024] [Indexed: 07/27/2024]
Abstract
Ovarian cancer, a significant contributor to cancer-related mortality, exhibits limited responsiveness to hormonal therapies targeting the estrogen receptor (ERα). This study aimed to elucidate the mechanisms behind ERα resistance to the therapeutic drug Fulvestrant (ICI182780 or ICI). Notably, compared to the cytoplasmic version, nuclear ERα was minimally degraded by ICI, suggesting a mechanism for drug resistance via the protective confines of the nuclear substructures. Of these substructures, we identified a 1.3MDa Megacomplex comprising transcription factors ERα, FOXA1, and PITX1 using size exclusion chromatography (SEC) in the ovarian cancer cell line, PEO4. ChIP-seq revealed these factors colocalized at 6,775 genomic positions representing sites of Megacomplex formation. Megacomplex ERα exhibited increased resistance to degradation by ICI compared to cytoplasmic and nuclear ERα. A small molecule inhibitor of active chromatin and super-enhancers, JQ1, in combination with ICI significantly enhanced ERα degradation from Megacomplex as revealed by SEC and ChIP-seq. Interestingly, this combination degraded both the cytoplasmic as well as nuclear ERa. Pathway enrichment analysis showed parallel results for RNA-seq gene sets following Estradiol, ICI, or ICI plus JQ1 treatments as those defined by Megacomplex binding identified through ChIP-seq. Furthermore, similar pathway enrichments were confirmed in mass-spec analysis of the Megacomplex macromolecule fractions after modulation by Estradiol or ICI. These findings implicate Megacomplex in ERα-driven ovarian cancer chromatin regulation. This combined treatment strategy exhibited superior inhibition of cell proliferation and viability. Therefore, by uncovering ERα's resistance within the Megacomplex, the combined ICI plus JQ1 treatment elucidates a novel drug treatment vulnerability.
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Affiliation(s)
- Sushil Kumar Jaiswal
- Translational and Functional Genomics Branch, National Human Genome Research Institute, Bethesda, MD 20892
| | - Kevin Fedkenheuer
- Translational and Functional Genomics Branch, National Human Genome Research Institute, Bethesda, MD 20892
| | - Ronak Khamar
- Translational and Functional Genomics Branch, National Human Genome Research Institute, Bethesda, MD 20892
| | - Hua Tan
- Translational and Functional Genomics Branch, National Human Genome Research Institute, Bethesda, MD 20892
| | - Valer Gotea
- Translational and Functional Genomics Branch, National Human Genome Research Institute, Bethesda, MD 20892
| | - Sonam Raj
- Genitourinary Malignancies Branch, National Cancer Institute, Bethesda, MD 20892
| | - Michael Fedkenheuer
- Genomics and Immunity Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, Bethesda, MD 20892
| | - Abdel Elkahloun
- Microarrays and Single-Cell Genomics Core, National Human Genome Research Institute, Bethesda, MD 20892
| | - Ming Zhao
- HPLC Core, National Institute of Allergy and Infectious Diseases, Rockville, MD 20852
| | - Lisa M Jenkins
- Mass Spec Core, National Cancer Institute, Bethesda, MD 20892
| | | | - Laura Elnitski
- Translational and Functional Genomics Branch, National Human Genome Research Institute, Bethesda, MD 20892.
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Zhao J, Xu Y. PITX1 plays essential functions in cancer. Front Oncol 2023; 13:1253238. [PMID: 37841446 PMCID: PMC10570508 DOI: 10.3389/fonc.2023.1253238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 09/15/2023] [Indexed: 10/17/2023] Open
Abstract
PITX1, also known as the pituitary homeobox 1 gene, has emerged as a key regulator in animal growth and development, attracting significant research attention. Recent investigations have revealed the implication of dysregulated PITX1 expression in tumorigenesis, highlighting its involvement in cancer development. Notably, PITX1 interacts with p53 and exerts control over crucial cellular processes including cell cycle progression, apoptosis, and chemotherapy resistance. Its influence extends to various tumors, such as esophageal, colorectal, gastric, and liver cancer, contributing to tumor progression and metastasis. Despite its significance, a comprehensive review examining PITX1's role in oncology remains lacking. This review aims to address this gap by providing a comprehensive overview of PITX1 in different cancer types, with a particular focus on its clinicopathological significance.
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Affiliation(s)
- Jingpu Zhao
- Affiliated Hospital of Weifang Medical University, School of Clinical Medicine, Weifang Medical University, Weifang, Shandong, China
| | - Yongfeng Xu
- Abdominal Oncology Ward, Cancer Center, West China Hospital of Sichuan University, Chengdu, Sichuan, China
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Wesoly J, Pstrąg N, Derylo K, Michalec-Wawiórka B, Derebecka N, Nowicka H, Kajdasz A, Kluzek K, Srebniak M, Tchórzewski M, Kwias Z, Bluyssen H. Structural, topological, and functional characterization of transmembrane proteins TMEM213, 207, 116, 72 and 30B provides a potential link to ccRCC etiology. Am J Cancer Res 2023; 13:1863-1883. [PMID: 37293153 PMCID: PMC10244102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 04/02/2023] [Indexed: 06/10/2023] Open
Abstract
Due to their involvement in the development of various cancers Transmembrane Proteins (TMEMs) are the focus of many recent studies. Previously we reported TMEM de-regulation in clear cell Renal Cell Carcinoma (ccRCC) with TMEM213, 207, 116, 72 and 30B being among the most downregulated on mRNA level. TMEM down-regulation was also more pronounced in advanced ccRCC tumors and was potentially linked to clinical parameters such as: metastasis (TMEM72 and 116), Fuhrman grade (TMEM30B) and overall survival (TMEM30B). To further investigate these findings, first, we set off to prove experimentally that selected TMEMs are indeed membrane-bound as predicted in silico, we verified the presence of signaling peptides on their N-termini, orientation of TMEMs within the membrane and validated their predicted cellular localization. To investigate the potential role of selected TMEMs in cellular processes overexpression studies in HEK293 and HK-2 cell lines were carried out. Additionally, we tested TMEM isoform expression in ccRCC tumors, identified mutations in TMEM genes and examined chromosomal aberrations in their loci. We confirmed the membrane-bound status of all selected TMEMs, assigned TMEM213, and 207 to early endosomes, TMEM72 to early endosomes and plasma membrane, TMEM116 and 30B to the endoplasmic reticulum. The N-terminus of TMEM213 was found to be exposed to the cytoplasm, the C-terminus of TMEM207, 116 and 72 were directed toward the cytoplasm, and both termini of TMEM30B faced the cytoplasm. Interestingly, TMEM mutations and chromosomal aberrations were infrequent in ccRCC tumors, yet we identified potentially damaging mutations in TMEM213 and TMEM30B and found deletions in the TMEM30B locus in nearly 30% of the tumors. Overexpression studies suggested selected TMEMs may take part in carcinogenesis processes such as cell adhesion, regulation of epithelial cell proliferation, and regulation of adaptive immune response, which could indicate a link to the development and progression of ccRCC.
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Affiliation(s)
- Joanna Wesoly
- Laboratory of High Throughput Technologies, Adam Mickiewicz UniversityPoznan, Poland
| | - Natalia Pstrąg
- Laboratory of High Throughput Technologies, Adam Mickiewicz UniversityPoznan, Poland
| | - Kamil Derylo
- Department of Molecular Biology, Maria Curie-Sklodowska UniversityLublin, Poland
| | | | - Natalia Derebecka
- Laboratory of High Throughput Technologies, Adam Mickiewicz UniversityPoznan, Poland
| | - Hanna Nowicka
- Laboratory of High Throughput Technologies, Adam Mickiewicz UniversityPoznan, Poland
| | - Arkadiusz Kajdasz
- Laboratory of Human Molecular Genetics, Adam Mickiewicz UniversityPoznan, Poland
| | - Katarzyna Kluzek
- Laboratory of Human Molecular Genetics, Adam Mickiewicz UniversityPoznan, Poland
| | | | - Marek Tchórzewski
- Department of Molecular Biology, Maria Curie-Sklodowska UniversityLublin, Poland
| | - Zbigniew Kwias
- Department of Urology and Urological Oncology, Poznan University of Medical SciencesPoznan, Poland
| | - Hans Bluyssen
- Laboratory of Human Molecular Genetics, Adam Mickiewicz UniversityPoznan, Poland
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Punzón-Jiménez P, Lago V, Domingo S, Simón C, Mas A. Molecular Management of High-Grade Serous Ovarian Carcinoma. Int J Mol Sci 2022; 23:13777. [PMID: 36430255 PMCID: PMC9692799 DOI: 10.3390/ijms232213777] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 11/04/2022] [Accepted: 11/07/2022] [Indexed: 11/11/2022] Open
Abstract
High-grade serous ovarian carcinoma (HGSOC) represents the most common form of epithelial ovarian carcinoma. The absence of specific symptoms leads to late-stage diagnosis, making HGSOC one of the gynecological cancers with the worst prognosis. The cellular origin of HGSOC and the role of reproductive hormones, genetic traits (such as alterations in P53 and DNA-repair mechanisms), chromosomal instability, or dysregulation of crucial signaling pathways have been considered when evaluating prognosis and response to therapy in HGSOC patients. However, the detection of HGSOC is still based on traditional methods such as carbohydrate antigen 125 (CA125) detection and ultrasound, and the combined use of these methods has yet to support significant reductions in overall mortality rates. The current paradigm for HGSOC management has moved towards early diagnosis via the non-invasive detection of molecular markers through liquid biopsies. This review presents an integrated view of the relevant cellular and molecular aspects involved in the etiopathogenesis of HGSOC and brings together studies that consider new horizons for the possible early detection of this gynecological cancer.
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Affiliation(s)
- Paula Punzón-Jiménez
- Carlos Simon Foundation, INCLIVA Health Research Institute, 46010 Valencia, Spain
| | - Victor Lago
- Department of Gynecologic Oncology, La Fe University and Polytechnic Hospital, 46026 Valencia, Spain
- Department of Obstetrics and Gynecology, CEU Cardenal Herrera University, 46115 Valencia, Spain
| | - Santiago Domingo
- Department of Gynecologic Oncology, La Fe University and Polytechnic Hospital, 46026 Valencia, Spain
- Department of Pediatrics, Obstetrics and Gynecology, Universidad de Valencia, 46010 Valencia, Spain
| | - Carlos Simón
- Carlos Simon Foundation, INCLIVA Health Research Institute, 46010 Valencia, Spain
- Department of Pediatrics, Obstetrics and Gynecology, Universidad de Valencia, 46010 Valencia, Spain
- Department of Pediatrics, Obstetrics and Gynecology, Beth Israel Deaconess Medical Center, Harvard University, Boston, MA 02215, USA
- Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Aymara Mas
- Carlos Simon Foundation, INCLIVA Health Research Institute, 46010 Valencia, Spain
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Garcia-Mayea Y, Mir C, Carballo L, Sánchez-García A, Bataller M, LLeonart ME. TSPAN1, a novel tetraspanin member highly involved in carcinogenesis and chemoresistance. Biochim Biophys Acta Rev Cancer 2021; 1877:188674. [PMID: 34979155 DOI: 10.1016/j.bbcan.2021.188674] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 12/22/2021] [Accepted: 12/27/2021] [Indexed: 12/11/2022]
Abstract
The tetraspanin (TSPAN) family constitutes a poorly explored family of membrane receptors involved in various physiological processes, with relevant roles in anchoring multiple proteins, acting as scaffolding proteins, and cell signaling. Recent studies have increasingly demonstrated the involvement of TSPANs in cancer. In particular, tetraspanin 1 (also known as TSPAN1, NET-1, TM4C, C4.8 or GEF) has been implicated in cell survival, proliferation and invasion. Recently, our laboratory revealed a key role of TSPAN1 in the acquired resistance of tumor cells to conventional chemotherapy (e.g., cisplatin). In this review, we summarize and discuss the latest research on the physiological mechanisms of TSPANs in cancer and, in particular, on TSPAN1 regulating resistance to chemotherapy. A model of TSPAN1 action is proposed, and the potential of targeting TSPAN1 in anticancer therapeutic strategies is discussed.
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Affiliation(s)
- Yoelsis Garcia-Mayea
- Biomedical Research in Cancer Stem Cells Group, Vall d'Hebron Research Institute (VHIR), Universitat Autònoma de Barcelona, Passeig Vall d'Hebron 119-129, 08035 Barcelona, Spain
| | - Cristina Mir
- Biomedical Research in Cancer Stem Cells Group, Vall d'Hebron Research Institute (VHIR), Universitat Autònoma de Barcelona, Passeig Vall d'Hebron 119-129, 08035 Barcelona, Spain
| | - Laia Carballo
- Biomedical Research in Cancer Stem Cells Group, Vall d'Hebron Research Institute (VHIR), Universitat Autònoma de Barcelona, Passeig Vall d'Hebron 119-129, 08035 Barcelona, Spain
| | - Almudena Sánchez-García
- Biomedical Research in Cancer Stem Cells Group, Vall d'Hebron Research Institute (VHIR), Universitat Autònoma de Barcelona, Passeig Vall d'Hebron 119-129, 08035 Barcelona, Spain
| | - Marina Bataller
- Biomedical Research in Cancer Stem Cells Group, Vall d'Hebron Research Institute (VHIR), Universitat Autònoma de Barcelona, Passeig Vall d'Hebron 119-129, 08035 Barcelona, Spain
| | - Matilde E LLeonart
- Biomedical Research in Cancer Stem Cells Group, Vall d'Hebron Research Institute (VHIR), Universitat Autònoma de Barcelona, Passeig Vall d'Hebron 119-129, 08035 Barcelona, Spain; Spanish Biomedical Research Network Center in Oncology, CIBERONC, Spain.
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