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Coronel-Hernández J, Delgado-Waldo I, Cantú de León D, López-Camarillo C, Jacobo-Herrera N, Ramos-Payán R, Pérez-Plasencia C. HypoxaMIRs: Key Regulators of Hallmarks of Colorectal Cancer. Cells 2022; 11:1895. [PMID: 35741024 PMCID: PMC9221210 DOI: 10.3390/cells11121895] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 06/03/2022] [Accepted: 06/07/2022] [Indexed: 01/27/2023] Open
Abstract
Hypoxia in cancer is a thoroughly studied phenomenon, and the logical cause of the reduction in oxygen tension is tumor growth itself. While sustained hypoxia leads to death by necrosis in cells, there is an exquisitely regulated mechanism that rescues hypoxic cells from their fatal fate. The accumulation in the cytoplasm of the transcription factor HIF-1α, which, under normoxic conditions, is marked for degradation by a group of oxygen-sensing proteins known as prolyl hydroxylases (PHDs) in association with the von Hippel-Lindau anti-oncogene (VHL) is critical for the cell, as it regulates different mechanisms through the genes it induces. A group of microRNAs whose expression is regulated by HIF, collectively called hypoxaMIRs, have been recognized. In this review, we deal with the hypoxaMIRs that have been shown to be expressed in colorectal cancer. Subsequently, using data mining, we analyze a panel of hypoxaMIRs expressed in both normal and tumor tissues obtained from TCGA. Finally, we assess the impact of these hypoxaMIRs on cancer hallmarks through their target genes.
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Affiliation(s)
- Jossimar Coronel-Hernández
- Genomics Laboratory, The National Cancer Institute of México, Tlalpan, Mexico City 14080, Mexico; (I.D.-W.); (D.C.d.L.)
- Functional Genomics Laboratory, Biomedicine Unit, FES-IZTACALA, UNAM, Tlalnepantla 54090, Mexico
| | - Izamary Delgado-Waldo
- Genomics Laboratory, The National Cancer Institute of México, Tlalpan, Mexico City 14080, Mexico; (I.D.-W.); (D.C.d.L.)
| | - David Cantú de León
- Genomics Laboratory, The National Cancer Institute of México, Tlalpan, Mexico City 14080, Mexico; (I.D.-W.); (D.C.d.L.)
| | - César López-Camarillo
- Posgrado en Ciencias Genómicas, Universidad Autónoma de la Ciudad de México, Mexico City 03100, Mexico;
| | - Nadia Jacobo-Herrera
- Biochemistry Unit, Institute of Medical Sciences and Nutrition, Salvador Zubirán, Tlalpan, Mexico City 14080, Mexico;
| | - Rosalío Ramos-Payán
- Facultad de Ciencias Químico Biológicas, Universidad Autónoma de Sinaloa, Culiacan City 80030, Mexico;
| | - Carlos Pérez-Plasencia
- Genomics Laboratory, The National Cancer Institute of México, Tlalpan, Mexico City 14080, Mexico; (I.D.-W.); (D.C.d.L.)
- Functional Genomics Laboratory, Biomedicine Unit, FES-IZTACALA, UNAM, Tlalnepantla 54090, Mexico
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Coronel-Hernández J, Salgado-García R, Cantú-De León D, Jacobo-Herrera N, Millan-Catalan O, Delgado-Waldo I, Campos-Parra AD, Rodríguez-Morales M, Delgado-Buenrostro NL, Pérez-Plasencia C. Combination of Metformin, Sodium Oxamate and Doxorubicin Induces Apoptosis and Autophagy in Colorectal Cancer Cells via Downregulation HIF-1α. Front Oncol 2021; 11:594200. [PMID: 34123772 PMCID: PMC8187873 DOI: 10.3389/fonc.2021.594200] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 04/30/2021] [Indexed: 01/07/2023] Open
Abstract
Colorectal cancer (CRC) is the third leading cause of cancer-related death worldwide in both sexes. Current therapies include surgery, chemotherapy, and targeted therapy; however, prolonged exposure to chemical agents induces toxicity in patients and drug resistance. So, we implemented a therapeutic strategy based on the combination of doxorubicin, metformin, and sodium oxamate called triple therapy (Tt). We found that Tt significantly reduced proliferation by inhibiting the mTOR/AKT pathway and promoted apoptosis and autophagy in CRC derived cells compared with doxorubicin. Several autophagy genes were assessed by western blot; ULK1, ATG4, and LC3 II were overexpressed by Tt. Interestingly, ULK1 was the only one autophagy-related protein gradually overexpressed during Tt administration. Thus, we assumed that there was a post-transcriptional mechanism mediating by microRNAs that regulate UKL1 expression during autophagy activation. Through bioinformatics approaches, we ascertained that ULK1 could be targeted by mir-26a, which is overexpressed in advanced stages of CRC. In vitro experiments revealed that overexpression of mir-26a decreased significantly ULK1, mRNA, and protein expression. Contrariwise, the Tt recovered ULK1 expression by mir-26a decrease. Due to triple therapy repressed mir-26a expression, we hypothesized this drug combination could be involved in mir-26a transcription regulation. Consequently, we analyzed the mir-26a promoter sequence and found two HIF-1α transcription factor recognition sites. We developed two different HIF-1α stabilization models. Both showed mir-26a overexpression and ULK1 reduction in hypoxic conditions. Immunoprecipitation experiments were performed and HIF-1α enrichment was observed in mir-26a promoter. Surprisingly, Tt diminished HIF-1α detection and restored ULK1 mRNA expression. These results reveal an important regulation mechanism controlled by the signaling that activates HIF-1α and that in turn regulates mir-26a transcription.
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Affiliation(s)
- Jossimar Coronel-Hernández
- Laboratorio de Genómica Funcional, Unidad de Biomedicina, FES-Iztacala, UNAM, Tlalnepantla, Mexico,Laboratorio de Genómica, Instituto Nacional de Cancerología, Tlalpan, Mexico
| | | | - David Cantú-De León
- Laboratorio de Genómica, Instituto Nacional de Cancerología, Tlalpan, Mexico
| | | | | | | | | | | | | | - Carlos Pérez-Plasencia
- Laboratorio de Genómica Funcional, Unidad de Biomedicina, FES-Iztacala, UNAM, Tlalnepantla, Mexico,Laboratorio de Genómica, Instituto Nacional de Cancerología, Tlalpan, Mexico,*Correspondence: Carlos Pérez-Plasencia,
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Bernardini A, Wolf A, Brockmeier U, Riffkin H, Metzen E, Acker-Palmer A, Fandrey J, Acker H. Carotid body type I cells engage flavoprotein and Pin1 for oxygen sensing. Am J Physiol Cell Physiol 2020; 318:C719-C731. [PMID: 31967857 DOI: 10.1152/ajpcell.00320.2019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Carotid body (CB) type I cells sense the blood Po2 and generate a nervous signal for stimulating ventilation and circulation when blood oxygen levels decline. Three oxygen-sensing enzyme complexes may be used for this purpose: 1) mitochondrial electron transport chain metabolism, 2) heme oxygenase 2 (HO-2)-generating CO, and/or 3) an NAD(P)H oxidase (NOX). We hypothesize that intracellular redox changes are the link between the sensor and nervous signals. To test this hypothesis type I cell autofluorescence of flavoproteins (Fp) and NAD(P)H within the mouse CB ex vivo was recorded as Fp/(Fp+NAD(P)H) redox ratio. CB type I cell redox ratio transiently declined with the onset of hypoxia. Upon reoxygenation, CB type I cells showed a significantly increased redox ratio. As a control organ, the non-oxygen-sensing sympathetic superior cervical ganglion (SCG) showed a continuously reduced redox ratio upon hypoxia. CN-, diphenyleneiodonium, or reactive oxygen species influenced chemoreceptor discharge (CND) with subsequent loss of O2 sensitivity and inhibited hypoxic Fp reduction only in the CB but not in SCG Fp, indicating a specific role of Fp in the oxygen-sensing process. Hypoxia-induced changes in CB type I cell redox ratio affected peptidyl prolyl isomerase Pin1, which is believed to colocalize with the NADPH oxidase subunit p47phox in the cell membrane to trigger the opening of potassium channels. We postulate that hypoxia-induced changes in the Fp-mediated redox ratio of the CB regulate the Pin1/p47phox tandem to alter type I cell potassium channels and therewith CND.
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Affiliation(s)
- André Bernardini
- Institute of Physiology, University of Duisburg-Essen, Essen, Germany
| | - Alexandra Wolf
- Institute of Physiology, University of Duisburg-Essen, Essen, Germany
| | - Ulf Brockmeier
- Institute of Physiology, University of Duisburg-Essen, Essen, Germany
| | - Helena Riffkin
- Institute of Physiology, University of Duisburg-Essen, Essen, Germany
| | - Eric Metzen
- Institute of Physiology, University of Duisburg-Essen, Essen, Germany
| | - Amparo Acker-Palmer
- Institute for Cell Biology and Neuroscience, Goethe University, Frankfurt, Germany
| | - Joachim Fandrey
- Institute of Physiology, University of Duisburg-Essen, Essen, Germany
| | - Helmut Acker
- Institute of Physiology, University of Duisburg-Essen, Essen, Germany
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