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Wu Y, Lee M, Mutlu AS, Wang M, Reiner DJ. RAL-1 signaling regulates lipid composition in C. elegans. MICROPUBLICATION BIOLOGY 2024; 2024:10.17912/micropub.biology.001054. [PMID: 38454952 PMCID: PMC10918476 DOI: 10.17912/micropub.biology.001054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Revised: 01/31/2024] [Accepted: 02/20/2024] [Indexed: 03/09/2024]
Abstract
Signaling by the Ral small GTPase is poorly understood in vivo . Caenorhabditis elegans animals with constitutively activated RAL-1 or deficient for the inhibitory RalGAP, HGAP-1 /2, display pale intestines. Staining with Oil Red O detected decreased intestinal lipids in the hgap-1 deletion mutant relative to the wild type. Constitutively activated RAL-1 decreased lipid detected by stimulated Raman scattering (SRS) microscopy, a label-free method of detecting lipid by laser excitation and detection. A signaling-deficient missense mutant for RAL-1 also displayed reduced lipid staining via SRS. We conclude that RAL-1 signaling regulates lipid homeostasis, biosynthesis or storage in live animals.
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Affiliation(s)
- You Wu
- Department of Translational Medical Sciences, School of Medicine, Texas A&M University, Houston, TX
| | - Minjung Lee
- Department of Translational Medical Sciences, School of Medicine, Texas A&M University, Houston, TX
| | - A. Sena Mutlu
- Huffington Center on Aging, Baylor College of Medicine, Houston, Texas, United States
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, United States
| | - Meng Wang
- Janelia Research Campus, Ashburn, Virginia, United States
| | - David J. Reiner
- Department of Translational Medical Sciences, School of Medicine, Texas A&M University, Houston, TX
- Institute of Biosciences and Technology, Texas A&M Health Science Center, Texas A&M University, Houston, TX
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2
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Capela AM, Tavares-Marcos C, Estima-Arede HF, Nóbrega-Pereira S, Bernardes de Jesus B. NORAD-Regulated Signaling Pathways in Breast Cancer Progression. Cancers (Basel) 2024; 16:636. [PMID: 38339387 PMCID: PMC10854850 DOI: 10.3390/cancers16030636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 01/27/2024] [Accepted: 01/30/2024] [Indexed: 02/12/2024] Open
Abstract
Long non-coding RNA activated by DNA damage (NORAD) has recently been associated with pathologic mechanisms underlying cancer progression. Due to NORAD's extended range of interacting partners, there has been contradictory data on its oncogenic or tumor suppressor roles in BC. This review will summarize the function of NORAD in different BC subtypes and how NORAD impacts crucial signaling pathways in this pathology. Through the preferential binding to pumilio (PUM) proteins PUM1 and PUM2, NORAD has been shown to be involved in the control of cell cycle, angiogenesis, mitosis, DNA replication and transcription and protein translation. More recently, NORAD has been associated with PUM-independent roles, accomplished by interacting with other ncRNAs, mRNAs and proteins. The intricate network of NORAD-mediated signaling pathways may provide insights into the potential design of novel unexplored strategies to overcome chemotherapy resistance in BC treatment.
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Affiliation(s)
| | | | | | - Sandrina Nóbrega-Pereira
- Department of Medical Sciences, Institute of Biomedicine—iBiMED, University of Aveiro, 3810-193 Aveiro, Portugal; (A.M.C.); (C.T.-M.); (H.F.E.-A.)
| | - Bruno Bernardes de Jesus
- Department of Medical Sciences, Institute of Biomedicine—iBiMED, University of Aveiro, 3810-193 Aveiro, Portugal; (A.M.C.); (C.T.-M.); (H.F.E.-A.)
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3
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Wright CA, Gordon ER, Cooper SJ. Genomic analysis reveals HDAC1 regulates clinically relevant transcriptional programs in Pancreatic cancer. BMC Cancer 2023; 23:1137. [PMID: 37996815 PMCID: PMC10666341 DOI: 10.1186/s12885-023-11645-0] [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: 04/27/2023] [Accepted: 11/15/2023] [Indexed: 11/25/2023] Open
Abstract
Novel strategies are needed to combat multidrug resistance in pancreatic ductal adenocarcinoma (PDAC). We applied genomic approaches to understand mechanisms of resistance in order to better inform treatment and precision medicine. Altered function of chromatin remodeling complexes contribute to chemoresistance. Our study generates and analyzes genomic and biochemical data from PDAC cells overexpressing HDAC1, a histone deacetylase involved in several chromatin remodeling complexes. We characterized the impact of overexpression on drug response, gene expression, HDAC1 binding, and chromatin structure using RNA-sequencing and ChIP-sequencing for HDAC1 and H3K27 acetylation. Integrative genomic analysis shows that HDAC1 overexpression promotes activation of key resistance pathways including epithelial to mesenchymal transition, cell cycle, and apoptosis through global chromatin remodeling. Target genes are similarly altered in patient tissues and show correlation with patient survival. We also demonstrate that direct targets of HDAC1 that also show altered chromatin are enriched near genes associated with altered GTPase activity. HDAC1 target genes identified using in vitro methods and observed in patient tissues were used to develop a clinically relevant nine-transcript signature associated with patient prognosis. Integration of multiple genomic and biochemical data types enables understanding of multidrug resistance and tumorigenesis in PDAC, a disease in desperate need of novel treatment strategies.
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Affiliation(s)
- Carter A Wright
- The University of Alabama in Huntsville, Huntsville, AL, 35899, USA
- HudsonAlpha Institute for Biotechnology, 601 Genome Way, Huntsville, AL, 35806, USA
| | - Emily R Gordon
- HudsonAlpha Institute for Biotechnology, 601 Genome Way, Huntsville, AL, 35806, USA
| | - Sara J Cooper
- HudsonAlpha Institute for Biotechnology, 601 Genome Way, Huntsville, AL, 35806, USA.
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4
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Gunn K, Myllykoski M, Cao JZ, Ahmed M, Huang B, Rouaisnel B, Diplas BH, Levitt MM, Looper R, Doench JG, Ligon KL, Kornblum HI, McBrayer SK, Yan H, Duy C, Godley LA, Koivunen P, Losman JA. (R)-2-Hydroxyglutarate Inhibits KDM5 Histone Lysine Demethylases to Drive Transformation in IDH-Mutant Cancers. Cancer Discov 2023; 13:1478-1497. [PMID: 36847506 PMCID: PMC10238656 DOI: 10.1158/2159-8290.cd-22-0825] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 12/21/2022] [Accepted: 02/22/2023] [Indexed: 03/01/2023]
Abstract
Oncogenic mutations in isocitrate dehydrogenase 1 (IDH1) and IDH2 occur in a wide range of cancers, including acute myeloid leukemia (AML) and glioma. Mutant IDH enzymes convert 2-oxoglutarate (2OG) to (R)-2-hydroxyglutarate [(R)-2HG], an oncometabolite that is hypothesized to promote cellular transformation by dysregulating 2OG-dependent enzymes. The only (R)-2HG target that has been convincingly shown to contribute to transformation by mutant IDH is the myeloid tumor suppressor TET2. However, there is ample evidence to suggest that (R)-2HG has other functionally relevant targets in IDH-mutant cancers. Here, we show that (R)-2HG inhibits KDM5 histone lysine demethylases and that this inhibition contributes to cellular transformation in IDH-mutant AML and IDH-mutant glioma. These studies provide the first evidence of a functional link between dysregulation of histone lysine methylation and transformation in IDH-mutant cancers. SIGNIFICANCE Mutant IDH is known to induce histone hypermethylation. However, it is not known if this hypermethylation is functionally significant or is a bystander effect of (R)-2HG accumulation in IDH-mutant cells. Here, we provide evidence that KDM5 inhibition by (R)-2HG contributes to mutant IDH-mediated transformation in AML and glioma. This article is highlighted in the In This Issue feature, p. 1275.
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Affiliation(s)
- Kathryn Gunn
- Division of Molecular and Cellular Oncology, Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | - Matti Myllykoski
- Biocenter Oulu, Faculty of Biochemistry and Molecular Medicine, University of Oulu, FI-90220, Oulu, Finland; Oulu Center for Cell-Matrix Research, University of Oulu, FI-90220, Oulu, Finland
| | - John Z. Cao
- Committee on Cancer Biology, Biological Sciences Division, University of Chicago, Chicago, IL 60637, USA
| | - Manna Ahmed
- Cancer Signaling and Epigenetics Program, Cancer Epigenetic Institute, Fox Chase Cancer Center, Philadelphia, PA 19111
| | - Bofu Huang
- Division of Molecular and Cellular Oncology, Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | - Betty Rouaisnel
- Division of Molecular and Cellular Oncology, Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | - Bill H. Diplas
- Department of Pathology, Duke University Medical Center, Durham, NC 27710, USA
| | - Michael M. Levitt
- Children’s Medical Center Research Institute and Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Ryan Looper
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, USA
| | - John G. Doench
- Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Keith L. Ligon
- Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
- Department of Pathology, Boston Children’s Hospital and Brigham and Women’s Hospital, Boston, MA 02115, USA
- Department of Oncologic Pathology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | - Harley I. Kornblum
- Intellectual and Developmental Disabilities Research Center, David Geffen School of Medicine at UCLA, Los Angeles, California 90095, USA
| | - Samuel K. McBrayer
- Children’s Medical Center Research Institute and Department of Pediatrics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Hai Yan
- Department of Pathology, Duke University Medical Center, Durham, NC 27710, USA
| | - Cihangir Duy
- Cancer Signaling and Epigenetics Program, Cancer Epigenetic Institute, Fox Chase Cancer Center, Philadelphia, PA 19111
| | - Lucy A. Godley
- Committee on Cancer Biology, Biological Sciences Division, University of Chicago, Chicago, IL 60637, USA
- Section of Hematology/Oncology, Departments of Medicine and Human Genetics, University of Chicago, Chicago, IL 60637, USA
| | - Peppi Koivunen
- Biocenter Oulu, Faculty of Biochemistry and Molecular Medicine, University of Oulu, FI-90220, Oulu, Finland; Oulu Center for Cell-Matrix Research, University of Oulu, FI-90220, Oulu, Finland
| | - Julie-Aurore Losman
- Division of Molecular and Cellular Oncology, Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, MA 02215, USA
- Division of Hematology, Department of Medicine, Brigham and Women’s Hospital, Boston, MA 02115, USA
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5
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Cao M, Li X, Trinh DA, Yoshimachi S, Goto K, Sakata N, Ishida M, Ohtsuka H, Unno M, Wang Y, Shirakawa R, Horiuchi H. Ral GTPase promotes metastasis of pancreatic ductal adenocarcinoma via elevation of TGF-β1 production. J Biol Chem 2023; 299:104754. [PMID: 37116704 DOI: 10.1016/j.jbc.2023.104754] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 03/28/2023] [Accepted: 04/10/2023] [Indexed: 04/30/2023] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC), caused by activating mutations in K-Ras, is an aggressive malignancy due to its early invasion and metastasis. Ral GTPases are activated downstream of Ras and play a crucial role in the development and progression of PDAC. However, the underlying mechanisms remain unclear. In this study, we investigated the mechanism of Ral-induced invasion and metastasis of PDAC cells using RalGAPβ-deficient PDAC cells with highly activated Ral GTPases. Array analysis and enzyme-linked immunosorbent assays revealed increased expression and secretion of TGF-β1 in RalGAPβ-deficient PDAC cells compared to control cells. Blockade of TGF-β1 signaling suppressed RalGAPβ deficiency-enhanced migration and invasion in vitro and metastasis in vivo to levels similar to controls. Phosphorylation of c-Jun N-terminal kinase (JNK), a repressor of TGF-β1 expression, was decreased by RalGAPβ deficiency. These results indicate that Ral contributes to invasion and metastasis of PDAC cells by elevating autocrine TGF-β1 signaling at least in part by decreasing JNK activity.
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Affiliation(s)
- Mingxin Cao
- Department of Molecular and Cellular Biology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Miyagi, Japan; Department of Oral Cancer Therapeutics, Graduate School of Dentistry, Tohoku University, Sendai, Miyagi, Japan; State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Oral and Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, Chengdu, China; School and Hospital of Stomatology, Tianjin Medical University, Tianjin, China
| | - Xinming Li
- Tianjin Key Laboratory of Oral and Maxillofacial Function Reconstruction, Tianjin Stomatological Hospital, The Affiliated Stomatological Hospital of Nankai University, Tianjin, China
| | - Duc-Anh Trinh
- Department of Molecular and Cellular Biology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Miyagi, Japan
| | - Shingo Yoshimachi
- Department of Molecular and Cellular Biology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Miyagi, Japan; Department of Surgery, Graduate School of Medicine, Tohoku University, Sendai, Miyagi, Japan
| | - Kota Goto
- Department of Molecular and Cellular Biology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Miyagi, Japan
| | - Natsumi Sakata
- Department of Molecular and Cellular Biology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Miyagi, Japan
| | - Masaharu Ishida
- Department of Surgery, Graduate School of Medicine, Tohoku University, Sendai, Miyagi, Japan
| | - Hideo Ohtsuka
- Department of Surgery, Graduate School of Medicine, Tohoku University, Sendai, Miyagi, Japan
| | - Michiaki Unno
- Department of Surgery, Graduate School of Medicine, Tohoku University, Sendai, Miyagi, Japan
| | - Yuxia Wang
- Tianjin Key Laboratory of Oral and Maxillofacial Function Reconstruction, Tianjin Stomatological Hospital, The Affiliated Stomatological Hospital of Nankai University, Tianjin, China
| | - Ryutaro Shirakawa
- Department of Molecular and Cellular Biology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Miyagi, Japan.
| | - Hisanori Horiuchi
- Department of Molecular and Cellular Biology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Miyagi, Japan; Department of Oral Cancer Therapeutics, Graduate School of Dentistry, Tohoku University, Sendai, Miyagi, Japan.
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6
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Richardson DS, Spehar JM, Han DT, Chakravarthy PA, Sizemore ST. The RAL Enigma: Distinct Roles of RALA and RALB in Cancer. Cells 2022; 11:cells11101645. [PMID: 35626682 PMCID: PMC9139244 DOI: 10.3390/cells11101645] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 04/29/2022] [Accepted: 05/05/2022] [Indexed: 11/16/2022] Open
Abstract
RALA and RALB are highly homologous small G proteins belonging to the RAS superfamily. Like other small GTPases, the RALs are molecular switches that can be toggled between inactive GDP-bound and active GTP-bound states to regulate diverse and critical cellular functions such as vesicle trafficking, filopodia formation, mitochondrial fission, and cytokinesis. The RAL paralogs are activated and inactivated by a shared set of guanine nucleotide exchange factors (GEFs) and GTPase-activating proteins (GAPs) and utilize similar sets of downstream effectors. In addition to their important roles in normal cell biology, the RALs are known to be critical mediators of cancer cell survival, invasion, migration, and metastasis. However, despite their substantial similarities, the RALs often display striking functional disparities in cancer. RALA and RALB can have redundant, unique, or even antagonistic functions depending on cancer type. The molecular basis for these discrepancies remains an important unanswered question in the field of cancer biology. In this review we examine the functions of the RAL paralogs in normal cellular physiology and cancer biology with special consideration provided to situations where the roles of RALA and RALB are non-redundant.
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7
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Yoshimachi S, Shirakawa R, Cao M, Trinh DA, Gao P, Sakata N, Miyazaki K, Goto K, Miura T, Ariake K, Maeda S, Masuda K, Ishida M, Ohtsuka H, Unno M, Horiuchi H. Ral GTPase-activating protein regulates the malignancy of pancreatic ductal adenocarcinoma. Cancer Sci 2021; 112:3064-3073. [PMID: 34009715 PMCID: PMC8353909 DOI: 10.1111/cas.14970] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Revised: 04/22/2021] [Accepted: 04/30/2021] [Indexed: 02/05/2023] Open
Abstract
The small GTPases RalA and RalB are members of the Ras family and activated downstream of Ras. Ral proteins are found in GTP-bound active and GDP-bound inactive forms. The activation process is executed by guanine nucleotide exchange factors, while inactivation is mediated by GTPase-activating proteins (GAPs). RalGAPs are complexes that consist of a catalytic α1 or α2 subunit together with a common β subunit. Several reports implicate the importance of Ral in pancreatic ductal adenocarcinoma (PDAC). However, there are few reports on the relationship between levels of RalGAP expression and malignancy in PDAC. We generated RalGAPβ-deficient PDAC cells by CRISPR-Cas9 genome editing to investigate how increased Ral activity affects malignant phenotypes of PDAC cells. RalGAPβ-deficient PDAC cells exhibited several-fold higher Ral activity relative to control cells. They had a high migratory and invasive capacity. The RalGAPβ-deficient cells grew more rapidly than control cells when injected subcutaneously into nude mice. When injected into the spleen, the RalGAPβ-deficient cells formed larger splenic tumors with more liver metastases, and unlike controls, they disseminated into the abdominal cavity. These results indicate that RalGAPβ deficiency in PDAC cells contributes to high activities of RalA and RalB, leading to enhanced cell migration and invasion in vitro, and tumor growth and metastasis in vivo.
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Affiliation(s)
- Shingo Yoshimachi
- Department of Molecular and Cellular BiologyInstitute of Development, Aging and CancerTohoku UniversitySendaiJapan
- Department of SurgeryTohoku University Graduate School of MedicineSendaiJapan
| | - Ryutaro Shirakawa
- Department of Molecular and Cellular BiologyInstitute of Development, Aging and CancerTohoku UniversitySendaiJapan
| | - Mingxin Cao
- Department of Molecular and Cellular BiologyInstitute of Development, Aging and CancerTohoku UniversitySendaiJapan
| | - Duc Anh Trinh
- Department of Molecular and Cellular BiologyInstitute of Development, Aging and CancerTohoku UniversitySendaiJapan
| | - Pan Gao
- Department of Molecular and Cellular BiologyInstitute of Development, Aging and CancerTohoku UniversitySendaiJapan
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of General and Emergency DentistryWest China Hospital of StomatologySichuan UniversityChengduChina
| | - Natsumi Sakata
- Department of Molecular and Cellular BiologyInstitute of Development, Aging and CancerTohoku UniversitySendaiJapan
| | - Kento Miyazaki
- Department of Molecular and Cellular BiologyInstitute of Development, Aging and CancerTohoku UniversitySendaiJapan
- Department of SurgeryTohoku University Graduate School of MedicineSendaiJapan
| | - Kota Goto
- Department of Molecular and Cellular BiologyInstitute of Development, Aging and CancerTohoku UniversitySendaiJapan
| | - Takayuki Miura
- Department of SurgeryTohoku University Graduate School of MedicineSendaiJapan
| | - Kyohei Ariake
- Department of SurgeryTohoku University Graduate School of MedicineSendaiJapan
| | - Shimpei Maeda
- Department of SurgeryTohoku University Graduate School of MedicineSendaiJapan
| | - Kunihiro Masuda
- Department of SurgeryTohoku University Graduate School of MedicineSendaiJapan
| | - Masaharu Ishida
- Department of SurgeryTohoku University Graduate School of MedicineSendaiJapan
| | - Hideo Ohtsuka
- Department of SurgeryTohoku University Graduate School of MedicineSendaiJapan
| | - Michiaki Unno
- Department of SurgeryTohoku University Graduate School of MedicineSendaiJapan
| | - Hisanori Horiuchi
- Department of Molecular and Cellular BiologyInstitute of Development, Aging and CancerTohoku UniversitySendaiJapan
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