1
|
Wang Y, Wang S, Wang Y, Gao P, Wang L, Wang Q, Zhang Y, Liu K, Xia Q, Tu P. The natural compound sinometumine E derived from Corydalis decumbens promotes angiogenesis by regulating HIF-1/ VEGF pathway in vivo and in vitro. Biomed Pharmacother 2024; 178:117113. [PMID: 39067164 DOI: 10.1016/j.biopha.2024.117113] [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: 05/29/2024] [Revised: 07/04/2024] [Accepted: 07/07/2024] [Indexed: 07/30/2024] Open
Abstract
The rhizome of Corydalis decumbens is a traditional Chinese medicine commonly utilized in the clinical treatment of acute ischemic stroke. Numerous phytochemical and biological investigations have demonstrated that protoberberine alkaloids from C. decumbens exhibit diverse pharmaceutical activities against various diseases. Sinometumine E (SE), a protoberberine alkaloid isolated from C. decumbens for the first time, is characterized by a complex 6/6/6/6/6/6 hexacyclic skeleton. In the current study, we investigated the protective effects of SE on endothelial cell injury and its angiogenesis effects in zebrafish. The results suggested that SE showed significant anti-ischemic effects on OGD/R-induced HBEC-5i and HUVECs cell ischemia/reperfusion injury model. Furthermore, it promoted angiogenesis in PTK787-induced, MPTP-induced, and atorvastatin-induced vessel injury models of zebrafish, while also suppressing hypoxia-induced locomotor impairment in zebrafish. Transcriptome sequencing analysis provided a sign that SE likely to promotes angiogenesis through the HIF-1/VEGF signaling pathway to exert anti-ischemic effects. Consistently, SE modulated several genes related to HIF-1/VEGF signal pathway, such as hif-1, vegf, vegfr-2, pi3k, erk, akt and plcγ. Molecular docking analysis revealed that VEGFR-2 exhibited high binding affinity with SE, and western blot analysis confirmed that SE treatment enhanced the expression of VEGFR-2. In conclusion, our study profiled the angiogenic activities of SE in vitro and in vivo. The key targets and related pathways involved in anti-ischemic effects of SE, shedding light on the pharmacodynamic components and mechanisms of Corydalis decumbens, and provides valuable insights for identifying effective substances for the treatment of ischemic stroke.
Collapse
Affiliation(s)
- Yuqi Wang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
| | - Shuhui Wang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
| | - Yanhang Wang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
| | - Peng Gao
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
| | - Le Wang
- School of Pharmacy, Minzu University of China, Beijing 100081, China
| | - Qiqi Wang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
| | - Yun Zhang
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250103, China
| | - Kechun Liu
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250103, China
| | - Qing Xia
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250103, China.
| | - Pengfei Tu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China.
| |
Collapse
|
2
|
Alva R, Wiebe JE, Stuart JA. Revisiting reactive oxygen species production in hypoxia. Pflugers Arch 2024:10.1007/s00424-024-02986-1. [PMID: 38955833 DOI: 10.1007/s00424-024-02986-1] [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: 05/02/2024] [Revised: 06/20/2024] [Accepted: 06/24/2024] [Indexed: 07/04/2024]
Abstract
Cellular responses to hypoxia are crucial in various physiological and pathophysiological contexts and have thus been extensively studied. This has led to a comprehensive understanding of the transcriptional response to hypoxia, which is regulated by hypoxia-inducible factors (HIFs). However, the detailed molecular mechanisms of HIF regulation in hypoxia remain incompletely understood. In particular, there is controversy surrounding the production of mitochondrial reactive oxygen species (ROS) in hypoxia and how this affects the stabilization and activity of HIFs. This review examines this controversy and attempts to shed light on its origin. We discuss the role of physioxia versus normoxia as baseline conditions that can affect the subsequent cellular response to hypoxia and highlight the paucity of data on pericellular oxygen levels in most experiments, leading to variable levels of hypoxia that might progress to anoxia over time. We analyze the different outcomes reported in isolated mitochondria, versus intact cells or whole organisms, and evaluate the reliability of various ROS-detecting tools. Finally, we examine the cell-type and context specificity of oxygen's various effects. We conclude that while recent evidence suggests that the effect of hypoxia on ROS production is highly dependent on the cell type and the duration of exposure, efforts should be made to conduct experiments under carefully controlled, physiological microenvironmental conditions in order to rule out potential artifacts and improve reproducibility in research.
Collapse
Affiliation(s)
- Ricardo Alva
- Department of Biological Sciences, Brock University, St. Catharines, ON, L2S 3A1, Canada.
| | - Jacob E Wiebe
- Department of Biological Sciences, Brock University, St. Catharines, ON, L2S 3A1, Canada
| | - Jeffrey A Stuart
- Department of Biological Sciences, Brock University, St. Catharines, ON, L2S 3A1, Canada.
| |
Collapse
|
3
|
Alva R, Wiebe JE, Stuart JA. The effect of baseline O 2 conditions on the response of prostate cancer cells to hypoxia. Am J Physiol Cell Physiol 2024; 327:C97-C112. [PMID: 38646786 DOI: 10.1152/ajpcell.00155.2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Revised: 04/14/2024] [Accepted: 04/15/2024] [Indexed: 04/23/2024]
Abstract
The transcriptional response to hypoxia is largely regulated by the hypoxia-inducible factors (HIFs), which induce the expression of genes involved in glycolysis, angiogenesis, proliferation, and migration. Virtually all cell culture-based hypoxia experiments have used near-atmospheric (18% O2) oxygen levels as the baseline for comparison with hypoxia. However, this is hyperoxic compared with mammalian tissue microenvironments, where oxygen levels range from 2% to 9% O2 (physioxia). Thus, these experiments actually compare hyperoxia to hypoxia. To determine how the baseline O2 level affects the subsequent response to hypoxia, we cultured PC-3 prostate cancer cells in either 18% or 5% O2 for 2 wk before exposing them to hypoxia (∼1.1% pericellular O2) for 12-48 h. RNA-seq revealed that the transcriptional response to hypoxia was dependent on the baseline O2 level. Cells grown in 18% O2 before hypoxia exposure showed an enhanced induction of HIF targets, particularly genes involved in glucose metabolism, compared with cells grown in physioxia before hypoxia. Consistent with this, hypoxia significantly increased glucose consumption and metabolic activity only in cells previously cultured in 18% O2, but not in cells preadapted to 5% O2. Transcriptomic analyses also indicated effects on cell proliferation and motility, which were followed up by functional assays. Although unaffected by hypoxia, both proliferation and migration rates were greater in cells cultured in 5% O2 versus 18% O2. We conclude that an inappropriately hyperoxic starting condition affects the transcriptional and metabolic responses of PC-3 cells to hypoxia, which may compromise experiments on cancer metabolism in vitro.NEW & NOTEWORTHY Although human cell culture models have been instrumental to our understanding of the mechanisms involved in the cellular response to hypoxia, in virtually all experiments, cells are routinely cultured in near-atmospheric (∼18% O2) oxygen levels, which are hyperoxic relative to physiological conditions in vivo. Here, we show for the first time that cells cultured in physiological O2 levels (5% O2) respond differently to subsequent hypoxia than cells grown at 18%.
Collapse
Affiliation(s)
- Ricardo Alva
- Department of Biological SciencesBrock University, St. Catharines, Ontario, Canada
| | - Jacob E Wiebe
- Department of Biological SciencesBrock University, St. Catharines, Ontario, Canada
| | - Jeffrey A Stuart
- Department of Biological SciencesBrock University, St. Catharines, Ontario, Canada
| |
Collapse
|
4
|
Chettouh-Hammas N, Grillon C. Physiological skin oxygen levels: An important criterion for skin cell functionality and therapeutic approaches. Free Radic Biol Med 2024; 222:259-274. [PMID: 38908804 DOI: 10.1016/j.freeradbiomed.2024.06.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2024] [Revised: 06/15/2024] [Accepted: 06/18/2024] [Indexed: 06/24/2024]
Abstract
The skin is made up of different layers with various gradients, which maintain a complex microenvironment, particularly in terms of oxygen levels. However, all types of skin cells are cultured in conventional incubators that do not reproduce physiological oxygen levels. Instead, they are cultured at atmospheric oxygen levels, a condition that is far removed from physiology and may lead to the generation of free radicals known to induce skin ageing. This review aims to summarize the current literature on the effect of physiological oxygen levels on skin cells, highlight the shortcomings of current in vitro models, and demonstrate the importance of respecting skin oxygen levels. We begin by clarifying the terminology used about oxygen levels and describe the specific distribution of oxygen in the skin. We review and discuss how skin cells adapt their oxygen consumption and metabolism to oxygen levels environment, as well as the changes that are induced, particularly, their redox state, life cycle and functions. We examine the effects of oxygen on both simple culture models and more complex reconstructed skin models. Finally, we present the implications of oxygen modulation for a more therapeutic approach.
Collapse
Affiliation(s)
- Nadira Chettouh-Hammas
- Center for Molecular Biophysics UPR4301 CNRS, Rue Charles Sadron, 45071, Orléans, Cedex 2, France.
| | - Catherine Grillon
- Center for Molecular Biophysics UPR4301 CNRS, Rue Charles Sadron, 45071, Orléans, Cedex 2, France.
| |
Collapse
|
5
|
Wang W, Chen S, Qiao L, Zhang S, Liu Q, Yang K, Pan Y, Liu J, Liu W. Four Markers Useful for the Distinction of Intrauterine Growth Restriction in Sheep. Animals (Basel) 2023; 13:3305. [PMID: 37958061 PMCID: PMC10648371 DOI: 10.3390/ani13213305] [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: 09/03/2023] [Revised: 10/14/2023] [Accepted: 10/23/2023] [Indexed: 11/15/2023] Open
Abstract
Intrauterine growth restriction (IUGR) is a common perinatal complication in animal reproduction, with long-lasting negative effects on neonates and postnatal animals, which seriously negatively affects livestock production. In this study, we aimed to identify potential genes associated with the diagnosis of IUGR through bioinformatics analysis. Based on the 73 differentially expressed related genes obtained by differential analysis and weighted gene co-expression network analysis, we used three machine learning algorithms to identify 4 IUGR-related hub genes (IUGR-HGs), namely, ADAM9, CRYL1, NDP52, and SERPINA7, whose ROC curves showed that they are a good diagnostic target for IUGR. Next, we identified two molecular subtypes of IUGR through consensus clustering analysis and constructed a gene scoring system based on the IUGR-HGs. The results showed that the IUGR score was positively correlated with the risk of IUGR. The AUC value of IUGR scoring accuracy was 0.970. Finally, we constructed a new artificial neural network model based on the four IUGR-HGs to diagnose sheep IUGR, and its accuracy reached 0.956. In conclusion, the IUGR-HGs we identified provide new potential molecular markers and models for the diagnosis of IUGR in sheep; they can better diagnose whether sheep have IUGR. The present findings provide new perspectives on the diagnosis of IUGR.
Collapse
Affiliation(s)
- Wannian Wang
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, Shanxi Agricultural University, Taigu, Jinzhong 030801, China; (W.W.); (S.C.); (L.Q.); (S.Z.); (K.Y.); (Y.P.); (J.L.)
| | - Sijia Chen
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, Shanxi Agricultural University, Taigu, Jinzhong 030801, China; (W.W.); (S.C.); (L.Q.); (S.Z.); (K.Y.); (Y.P.); (J.L.)
| | - Liying Qiao
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, Shanxi Agricultural University, Taigu, Jinzhong 030801, China; (W.W.); (S.C.); (L.Q.); (S.Z.); (K.Y.); (Y.P.); (J.L.)
| | - Siying Zhang
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, Shanxi Agricultural University, Taigu, Jinzhong 030801, China; (W.W.); (S.C.); (L.Q.); (S.Z.); (K.Y.); (Y.P.); (J.L.)
| | - Qiaoxia Liu
- Shanxi Animal Husbandry Technology Extension Service Center, Taiyuan 030001, China;
| | - Kaijie Yang
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, Shanxi Agricultural University, Taigu, Jinzhong 030801, China; (W.W.); (S.C.); (L.Q.); (S.Z.); (K.Y.); (Y.P.); (J.L.)
| | - Yangyang Pan
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, Shanxi Agricultural University, Taigu, Jinzhong 030801, China; (W.W.); (S.C.); (L.Q.); (S.Z.); (K.Y.); (Y.P.); (J.L.)
| | - Jianhua Liu
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, Shanxi Agricultural University, Taigu, Jinzhong 030801, China; (W.W.); (S.C.); (L.Q.); (S.Z.); (K.Y.); (Y.P.); (J.L.)
| | - Wenzhong Liu
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, Shanxi Agricultural University, Taigu, Jinzhong 030801, China; (W.W.); (S.C.); (L.Q.); (S.Z.); (K.Y.); (Y.P.); (J.L.)
- Key Laboratory of Farm Animal Genetic Resources Exploration and Breeding of Shanxi Province, Jinzhong 030801, China
| |
Collapse
|
6
|
Kubaichuk K, Kietzmann T. USP10 Contributes to Colon Carcinogenesis via mTOR/S6K Mediated HIF-1α but Not HIF-2α Protein Synthesis. Cells 2023; 12:1585. [PMID: 37371055 DOI: 10.3390/cells12121585] [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: 04/28/2023] [Revised: 06/01/2023] [Accepted: 06/06/2023] [Indexed: 06/29/2023] Open
Abstract
Colorectal cancer ranks among the third most common human malignant diseases and is one of the leading causes of cancer-related deaths globally. Colon cancer cells are hypoxic and display disturbed protein homeostasis. Ubiquitin-ligase-initiated proteasomal degradation as well as its prevention by deubiquitinases (DUBs) are supposed to contribute to the above-mentioned disturbances. However, not much is known about the involvement of ubiquitinating and deubiquitinating enzymes in colon cancer and their effect on the hypoxia response. Here, we identify the DUB ubiquitin-specific protease 10 (USP10) as an important player in the control of colon cancer progression and a new modifier of the hypoxia response. Mechanistically, we show that knockout of USP10 in different colon cancer cells causes an elevation in HIF-1α but not HIF-2α protein levels under both normoxic and hypoxic conditions. In addition, the lack of USP10 increased cellular migration, reduced cell adhesion, and switched the energy phenotype towards increased glycolysis and enhanced extracellular acidification. These changes were at least partially caused by HIF-1α, as the knockdown of HIF-1α rescued the cellular phenotype caused by USP10 deficiency. Interestingly, the USP10-dependent increase in HIF-1 α was neither caused by enhanced transcription nor prolonged half-life but via mTOR/S6K mediated HIF-1α protein synthesis. Together, the current findings indicate that USP10 is able to participate in colon carcinogenesis by modulating the hypoxia response and may therefore represent a new therapeutic target.
Collapse
Affiliation(s)
- Kateryna Kubaichuk
- Faculty of Biochemistry and Molecular Biology, University of Oulu, 90570 Oulu, Finland
| | - Thomas Kietzmann
- Faculty of Biochemistry and Molecular Biology, University of Oulu, 90570 Oulu, Finland
| |
Collapse
|
7
|
Bayaraa O, Dashnyam K, Singh RK, Mandakhbayar N, Lee JH, Park JT, Lee JH, Kim HW. Nanoceria-GO-intercalated multicellular spheroids revascularize and salvage critical ischemic limbs through anti-apoptotic and pro-angiogenic functions. Biomaterials 2023; 292:121914. [PMID: 36436306 DOI: 10.1016/j.biomaterials.2022.121914] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 11/07/2022] [Accepted: 11/11/2022] [Indexed: 11/15/2022]
Abstract
Critical limb ischemia (CLI) is a serious form of peripheral arterial disease that involves severe blockage of blood flow in lower extremities, often leading to foot necrosis and limb loss. Lack of blood flow and high pro-inflammation with overproduced reactive oxygen species (ROS) in CLI aggravate the degenerative events. Among other therapies, cell delivery is considered potential for restoring regenerative capacity, and preservation of cell survival under high oxidative stress has been challenging and prerequisite to harness cellular functions. Here, we introduce a multicellular delivery system that is intercalated with nanoceria-decorated graphene oxide (CeGO), which is considered to have high ROS scavenging ability while providing cell-matrix interaction signals. The CeGO nano-microsheets (8-nm-nanoceria/0.9-μm-GO) incorporated in HUVEC/MSC (7/3) could form cell-material hybrid spheroids mediated by cellular contraction. Under in vitro oxidative-stress-challenge with H2O2, the CeGO-intercalation enhanced the survival and anti-apoptotic capacity of cellular spheroids. Pro-angiogenic events of cellular spheroids, including cell sprouting and expression of angiogenic markers (HIF1α, VEGF, FGF2, eNOS) were significantly enhanced by the CeGO-intercalation. Proteomics analysis also confirmed substantial up-regulation of a series of angiogenesis-related secretome molecules. Such pro-angiogenic events with CeGO-intercalation were proven to be mediated by the APE/Ref-1 signaling pathway. When delivered to ischemic hindlimb in mice, the CeGO-cell spheroids could inhibit the accumulation of in vivo ROS rapidly, preserving high cell survival rate (cells were more proliferative and less apoptotic vs. those in cell-only spheroids), and up-regulated angiogenic molecular expressions. Monitoring over 28 days revealed significantly enhanced blood reperfusion and tissue recovery, and an ultimate limb salvage with the CeGO-cell delivery (∼60% salvaged vs. ∼29% in cell-only delivery vs. 0% in ischemia control). Together, the CeGO intercalated in HUVEC/MSC delivery is considered a potential nano-microplatform for CLI treatment, by scavenging excessive ROS and enhancing transplanted cell survival, while stimulating angiogenic events, which collectively help revascularization and tissue recovery, salvaging critical ischemic limbs.
Collapse
Affiliation(s)
- Oyunchimeg Bayaraa
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, Republic of Korea; Department of Nanobiomedical Science and BK21 NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea; Drug Research Institute, Mongolian University of Pharmaceutical Science, 14250, Mongolia
| | - Khandmaa Dashnyam
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, Republic of Korea; Drug Research Institute, Mongolian University of Pharmaceutical Science, 14250, Mongolia
| | - Rajendra K Singh
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, Republic of Korea; Department of Nanobiomedical Science and BK21 NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea
| | - Nandin Mandakhbayar
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, Republic of Korea; Department of Nanobiomedical Science and BK21 NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea
| | - Jun Hee Lee
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, Republic of Korea; Department of Nanobiomedical Science and BK21 NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea; Department of Biomaterials Science, College of Dentistry, Dankook University, Cheonan, 31116, Republic of Korea; Mechanobiology Dental Medicine Research Center, Dankook University, Cheonan, 31116, Republic of Korea
| | - Jong-Tae Park
- Mechanobiology Dental Medicine Research Center, Dankook University, Cheonan, 31116, Republic of Korea; Department of Oral Anatomy, College of Dentistry, Dankook University, Cheonan, 31116, Republic of Korea
| | - Jung-Hwan Lee
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, Republic of Korea; Department of Nanobiomedical Science and BK21 NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea; Department of Biomaterials Science, College of Dentistry, Dankook University, Cheonan, 31116, Republic of Korea; Mechanobiology Dental Medicine Research Center, Dankook University, Cheonan, 31116, Republic of Korea; Cell & Matter Institute, Dankook University, Cheonan, 31116, Republic of Korea; UCL Eastman-Korea Dental Medicine Innovation Centre, Dankook University, Cheonan, 31116, Republic of Korea
| | - Hae-Won Kim
- Institute of Tissue Regeneration Engineering (ITREN), Dankook University, Cheonan, 31116, Republic of Korea; Department of Nanobiomedical Science and BK21 NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea; Department of Biomaterials Science, College of Dentistry, Dankook University, Cheonan, 31116, Republic of Korea; Mechanobiology Dental Medicine Research Center, Dankook University, Cheonan, 31116, Republic of Korea; Cell & Matter Institute, Dankook University, Cheonan, 31116, Republic of Korea; UCL Eastman-Korea Dental Medicine Innovation Centre, Dankook University, Cheonan, 31116, Republic of Korea.
| |
Collapse
|
8
|
Adebayo AK, Nakshatri H. Modeling Preclinical Cancer Studies under Physioxia to Enhance Clinical Translation. Cancer Res 2022; 82:4313-4321. [PMID: 36169928 PMCID: PMC9722631 DOI: 10.1158/0008-5472.can-22-2311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 08/31/2022] [Accepted: 09/23/2022] [Indexed: 01/24/2023]
Abstract
Oxygen (O2) plays a key role in cellular homeostasis. O2 levels are tightly regulated in vivo such that each tissue receives an optimal amount to maintain physiologic status. Physiologic O2 levels in various organs range between 2% and 9% in vivo, with the highest levels of 9% in the kidneys and the lowest of 0.5% in parts of the brain. This physiologic range of O2 tensions is disrupted in pathologic conditions such as cancer, where it can reach as low as 0.5%. Regardless of the state, O2 tension in vivo is maintained at significantly lower levels than ambient O2, which is approximately 21%. Yet, routine in vitro cellular manipulations are carried out in ambient air, regardless of whether or not they are eventually transferred to hypoxic conditions for subsequent studies. Even brief exposure of hematopoietic stem cells to ambient air can cause detrimental effects through a mechanism termed extraphysiologic oxygen shock/stress (EPHOSS), leading to reduced engraftment capabilities. Here, we provide an overview of the effects of ambient air exposure on stem and non-stem cell subtypes, with a focus on recent findings that reveal the impact of EPHOSS on cancer cells.
Collapse
Affiliation(s)
- Adedeji K. Adebayo
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, USA
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
- Indiana University Simon Comprehensive Cancer Center, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Harikrishna Nakshatri
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, USA
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
- Indiana University Simon Comprehensive Cancer Center, Indiana University School of Medicine, Indianapolis, IN 46202, USA
- Roudebush VA Medical Center, Indianapolis, IN 46202, USA
| |
Collapse
|
9
|
Hong J, Yoon S, Choi Y, Chu EA, Sik Jin K, Lee HY, Choi J. Rational Design of Nanoliposomes by Tuning their Bilayer Rigidity for the Controlled Release of Oxygen. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.121003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
10
|
In Vitro Angiogenesis Inhibition and Endothelial Cell Growth and Morphology. Int J Mol Sci 2022; 23:ijms23084277. [PMID: 35457095 PMCID: PMC9025250 DOI: 10.3390/ijms23084277] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 04/04/2022] [Accepted: 04/08/2022] [Indexed: 02/05/2023] Open
Abstract
A co-culture assay with human umbilical vein endothelial cells (HUVECs) and normal human dermal fibroblasts (NHDFs) was used to study whether selected angiogenesis inhibitors were able to inhibit differentiation and network formation of HUVECs in vitro. The effect of the inhibitors was determined by the morphology and the calculated percentage area covered by HUVECs. Neutralizing VEGF with avastin and polyclonal goat anti-VEGF antibody and inhibiting VEGFR2 with sorafenib and vatalanib resulted in the formation of HUVEC clusters of variable sizes as a result of inhibited EC differentiation. Furthermore, numerous inhibitors of the VEGF signaling pathways were tested for their effect on the growth and differentiation of HUVECs. The effects of these inhibitors did not reveal a cluster morphology, either individually or when combined to block VEGFR2 downstream pathways. Only the addition of N-methyl-p-bromolevamisole revealed a similar morphology as when targeting VEGF and VEGFR2, meaning it may have an inhibitory influence directly on VEGFR signaling. Additionally, several nuclear receptor ligands and miscellaneous compounds that might affect EC growth and differentiation were tested, but only dexamethasone gave rise to cluster formation similarly to VEGF-neutralizing compounds. These results point to a link between angiogenesis, HUVEC differentiation and glucocorticoid receptor activation.
Collapse
|
11
|
Yoon S, Hong J, Park B, Choi Y, Khan MS, Hwang J, Tanaka M, Choi J. Oxygen transport to mammalian cell and bacteria using nano-sized liposomes encapsulating oxygen molecules. J Biosci Bioeng 2021; 132:657-665. [PMID: 34538590 DOI: 10.1016/j.jbiosc.2021.08.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Revised: 08/25/2021] [Accepted: 08/26/2021] [Indexed: 12/23/2022]
Abstract
Hypoxic microenvironments emerge as tumor grow, leading to the over-expression and stabilization of hypoxia-inducible factor 1-alpha (HIF-1α). HIF-1α lowers the sensitization against chemotherapy, radiation therapy and photodynamic therapy in cancer. In this study, nano-sized oxygen carrier, namely oxygen dissolved nanoliposome (ODL) was synthesized, and oxygen was efficiently delivered to different types of mammalian cells to help relieve hypoxia. ODL confirmed that oxygen was released without inducing toxicity to cells. After artificially creating hypoxia in cancer cells, normal cells, and immune cells; various parameters such as cell morphology, HIF-1α expression, and degree of hypoxia were examined. The cellular environment was found to be altered by treatment with the ODL. Under hypoxia, the shape of the cells changed, and the cells began to die. After treatment with the ODL, the degree of hypoxia was reduced, indicating that HIF-1α expression and the rate of cell death decreased. Furthermore, bacteria proliferation was observed with the ODL. Therefore, ODL can be used for oxygen delivery platform in cancer therapy. ODL has a potential application in other microorganisms which needs future research.
Collapse
Affiliation(s)
- Semi Yoon
- School of Integrative Engineering, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Joohye Hong
- School of Integrative Engineering, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Bumjin Park
- School of Integrative Engineering, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Yonghyun Choi
- School of Integrative Engineering, Chung-Ang University, Seoul 06974, Republic of Korea
| | | | - Jangsun Hwang
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Masayoshi Tanaka
- Department of Chemical Science and Engineering, Tokyo Institute of Technology, 2-12-1-S1-24 O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Jonghoon Choi
- School of Integrative Engineering, Chung-Ang University, Seoul 06974, Republic of Korea.
| |
Collapse
|
12
|
Honda T, Hirakawa Y, Mizukami K, Yoshihara T, Tanaka T, Tobita S, Nangaku M. A distinctive distribution of hypoxia-inducible factor-1α in cultured renal tubular cells with hypoperfusion simulated by coverslip placement. Physiol Rep 2021; 9:e14689. [PMID: 33369883 PMCID: PMC7769172 DOI: 10.14814/phy2.14689] [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] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 11/11/2020] [Accepted: 11/12/2020] [Indexed: 11/24/2022] Open
Abstract
Chronic hypoxia in the renal tubulointerstitium plays a key role in the progression of chronic kidney disease (CKD). It is therefore important to investigate tubular hypoxia and the activity of hypoxia-inducible factor (HIF)-1α in response to hypoxia. Rarefaction of the peritubular capillary causes hypoperfusion in CKD; however, the effect of hypoperfusion on HIFs has rarely been investigated. We induced hypoperfusion caused by coverslip placement in human kidney-2 cells, and observed an oxygen gradient under the coverslip. Immunocytochemistry of HIF-1α showed a doughnut-shaped formation on the edge of a pimonidazole-positive area, which we named the "HIF-ring". The oxygen tension of the HIF-ring was estimated to be between approximately 4 mmHg and 20 mmHg. This result was not compatible with those of past research showing HIF-1α accumulation in the anoxic range with homogeneous oxygen tension. We further observed the presence of a pH gradient under a coverslip, as well as a shift of the HIF ring due to changes in the pH of the culture medium, suggesting that the HIF ring was formed by suppression of HIF-1α related to low pH. This research demonstrated that HIF-1α activation mimics the physiological state in cultured cells with hypoperfusion.
Collapse
Affiliation(s)
- Tomoko Honda
- Division of Nephrology and EndocrinologyGraduate School of MedicineThe University of TokyoTokyoJapan
| | - Yosuke Hirakawa
- Division of Nephrology and EndocrinologyGraduate School of MedicineThe University of TokyoTokyoJapan
| | - Kiichi Mizukami
- Graduate School of Science and TechnologyGunma UniversityGunmaJapan
| | | | - Tetsuhiro Tanaka
- Division of Nephrology and EndocrinologyGraduate School of MedicineThe University of TokyoTokyoJapan
| | - Seiji Tobita
- Graduate School of Science and TechnologyGunma UniversityGunmaJapan
| | - Masaomi Nangaku
- Division of Nephrology and EndocrinologyGraduate School of MedicineThe University of TokyoTokyoJapan
| |
Collapse
|
13
|
Ekpenyong‐Akiba AE, Poblocka M, Althubiti M, Rada M, Jurk D, Germano S, Kocsis‐Fodor G, Shi Y, Canales JJ, Macip S. Amelioration of age-related brain function decline by Bruton's tyrosine kinase inhibition. Aging Cell 2020; 19:e13079. [PMID: 31736210 PMCID: PMC6974713 DOI: 10.1111/acel.13079] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 10/10/2019] [Accepted: 10/31/2019] [Indexed: 01/17/2023] Open
Abstract
One of the hallmarks of aging is the progressive accumulation of senescent cells in organisms, which has been proposed to be a contributing factor to age-dependent organ dysfunction. We recently reported that Bruton's tyrosine kinase (BTK) is an upstream component of the p53 responses to DNA damage. BTK binds to and phosphorylates p53 and MDM2, which results in increased p53 activity. Consistent with this, blocking BTK impairs p53-induced senescence. This suggests that sustained BTK inhibition could have an effect on organismal aging by reducing the presence of senescent cells in tissues. Here, we show that ibrutinib, a clinically approved covalent inhibitor of BTK, prolonged the maximum lifespan of a Zmpste24-/- progeroid mice, which also showed a reduction in general age-related fitness loss. Importantly, we found that certain brain functions were preserved, as seen by reduced anxiety-like behaviour and better long-term spatial memory. This was concomitant to a decrease in the expression of specific markers of senescence in the brain, which confirms a lower accumulation of senescent cells after BTK inhibition. Our data show that blocking BTK has a modest increase in lifespan in Zmpste24-/- mice and protects them from a decline in brain performance. This suggests that specific inhibitors could be used in humans to treat progeroid syndromes and prevent the age-related degeneration of organs such as the brain.
Collapse
Affiliation(s)
- Akang E. Ekpenyong‐Akiba
- Mechanisms of Cancer and Aging Laboratory Department of Molecular and Cell Biology University of Leicester Leicester UK
| | - Marta Poblocka
- Mechanisms of Cancer and Aging Laboratory Department of Molecular and Cell Biology University of Leicester Leicester UK
| | - Mohammad Althubiti
- Mechanisms of Cancer and Aging Laboratory Department of Molecular and Cell Biology University of Leicester Leicester UK
- Department of Biochemistry Faculty of Medicine Umm Al‐Qura University Mecca Saudi Arabia
| | - Miran Rada
- Mechanisms of Cancer and Aging Laboratory Department of Molecular and Cell Biology University of Leicester Leicester UK
| | - Diana Jurk
- Ageing Research Laboratories Institute for Ageing and Health Newcastle University Newcastle upon Tyne UK
- Centre for Integrated Systems Biology of Ageing and Nutrition Institute for Ageing and Health Newcastle University Newcastle upon Tyne UK
- Department of Physiology and Biomedical Engineering, Robert and Arlene Kogod Center on Aging Mayo Clinic Rochester MN USA
| | - Sandra Germano
- Mechanisms of Cancer and Aging Laboratory Department of Molecular and Cell Biology University of Leicester Leicester UK
| | - Gabriella Kocsis‐Fodor
- Mechanisms of Cancer and Aging Laboratory Department of Molecular and Cell Biology University of Leicester Leicester UK
| | - Yu Shi
- Mechanisms of Cancer and Aging Laboratory Department of Molecular and Cell Biology University of Leicester Leicester UK
| | - Juan J. Canales
- Division of Psychology School of Medicine University of Tasmania Hobart TAS Australia
| | - Salvador Macip
- Mechanisms of Cancer and Aging Laboratory Department of Molecular and Cell Biology University of Leicester Leicester UK
| |
Collapse
|
14
|
Keeley TP, Mann GE. Defining Physiological Normoxia for Improved Translation of Cell Physiology to Animal Models and Humans. Physiol Rev 2019; 99:161-234. [PMID: 30354965 DOI: 10.1152/physrev.00041.2017] [Citation(s) in RCA: 169] [Impact Index Per Article: 33.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The extensive oxygen gradient between the air we breathe (Po2 ~21 kPa) and its ultimate distribution within mitochondria (as low as ~0.5-1 kPa) is testament to the efforts expended in limiting its inherent toxicity. It has long been recognized that cell culture undertaken under room air conditions falls short of replicating this protection in vitro. Despite this, difficulty in accurately determining the appropriate O2 levels in which to culture cells, coupled with a lack of the technology to replicate and maintain a physiological O2 environment in vitro, has hindered addressing this issue thus far. In this review, we aim to address the current understanding of tissue Po2 distribution in vivo and summarize the attempts made to replicate these conditions in vitro. The state-of-the-art techniques employed to accurately determine O2 levels, as well as the issues associated with reproducing physiological O2 levels in vitro, are also critically reviewed. We aim to provide the framework for researchers to undertake cell culture under O2 levels relevant to specific tissues and organs. We envisage that this review will facilitate a paradigm shift, enabling translation of findings under physiological conditions in vitro to disease pathology and the design of novel therapeutics.
Collapse
Affiliation(s)
- Thomas P Keeley
- King's British Heart Foundation Centre of Research Excellence, School of Cardiovascular Medicine and Sciences, Faculty of Life Sciences and Medicine, King's College London , London , United Kingdom
| | - Giovanni E Mann
- King's British Heart Foundation Centre of Research Excellence, School of Cardiovascular Medicine and Sciences, Faculty of Life Sciences and Medicine, King's College London , London , United Kingdom
| |
Collapse
|
15
|
BTK modulates p73 activity to induce apoptosis independently of p53. Cell Death Discov 2018; 4:30. [PMID: 30245853 PMCID: PMC6134113 DOI: 10.1038/s41420-018-0097-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 08/02/2018] [Accepted: 08/06/2018] [Indexed: 02/07/2023] Open
Abstract
Bruton’s tyrosine kinase (BTK) is a key component of B cell receptor signalling. Because of this, BTK plays an important role in cell proliferation and survival in various B cell malignancies. However, in certain contexts, BTK can also have tumour suppressor functions. We have previously shown that BTK activates the p53 transcriptional activity by binding to and phosphorylating p53, as well as acting on MDM2 to reduce its inhibitory effects. This results in increased p53 functions, including enhanced cell death. Here, we report that BTK can also induce cell death and increase responses to DNA damage independently of p53. This is concomitant to the induction of p21, PUMA and MDM2, which are classic target genes of the p53 family of proteins. Our results show that these p53-independent effects of BTK are mediated through p73. Similar to what we observed in the p53 pathway, BTK can upregulate p73 after DNA damage and induce expression of its target genes, suggesting that BTK is a modulator of p73 functions and in the absence of p53. This effect allows BTK to have pro-apoptotic functions independently of its effects on the p53 pathway and thus play an important role in the DNA damage-related induction of apoptosis in the absence of p53. This provides a novel role of BTK in tumour suppression and contributes to the understanding of its complex pleiotropic functions
Collapse
|
16
|
Araos J, Sleeman JP, Garvalov BK. The role of hypoxic signalling in metastasis: towards translating knowledge of basic biology into novel anti-tumour strategies. Clin Exp Metastasis 2018; 35:563-599. [DOI: 10.1007/s10585-018-9930-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Accepted: 08/13/2018] [Indexed: 02/06/2023]
|
17
|
Physiological Hypoxia (Physioxia) Impairs the Early Adhesion of Single Lymphoma Cell to Marrow Stromal Cell and Extracellular Matrix. Optical Tweezers Study. Int J Mol Sci 2018; 19:ijms19071880. [PMID: 29949925 PMCID: PMC6073489 DOI: 10.3390/ijms19071880] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 06/20/2018] [Accepted: 06/21/2018] [Indexed: 12/29/2022] Open
Abstract
Adhesion is critical for the maintenance of cellular structures as well as intercellular communication, and its dysfunction occurs prevalently during cancer progression. Recently, a growing number of studies indicated the ability of oxygen to regulate adhesion molecules expression, however, the influence of physiological hypoxia (physioxia) on cell adhesion remains elusive. Thus, here we aimed: (i) to develop an optical tweezers based assay to precisely evaluate single diffuse large B-cell lymphoma (DLBCL) cell adhesion to neighbor cells (mesenchymal stromal cells) and extracellular matrix (Matrigel) under normoxia and physioxia; and, (ii) to explore the role of integrins in adhesion of single lymphoma cell. We identified the pronouncedly reduced adhesive properties of lymphoma cell lines and primary lymphocytes B under physioxia to both stromal cells and Matrigel. Corresponding effects were shown in bulk adhesion assays. Then we emphasized that impaired β1, β2 integrins, and cadherin-2 expression, studied by confocal microscopy, account for reduction in lymphocyte adhesion in physioxia. Additionally, the blockade studies conducted with anti-integrin antibodies have revealed the critical role of integrins in lymphoma adhesion. To summarize, the presented approach allows for precise confirmation of the changes in single cell adhesion properties provoked by physiological hypoxia. Thus, our findings reveal an unprecedented role of using physiologically relevant oxygen conditioning and single cell adhesion approaches when investigating tumor adhesion in vitro.
Collapse
|
18
|
Tang H, Babicheva A, McDermott KM, Gu Y, Ayon RJ, Song S, Wang Z, Gupta A, Zhou T, Sun X, Dash S, Wang Z, Balistrieri A, Zheng Q, Cordery AG, Desai AA, Rischard F, Khalpey Z, Wang J, Black SM, Garcia JGN, Makino A, Yuan JXJ. Endothelial HIF-2α contributes to severe pulmonary hypertension due to endothelial-to-mesenchymal transition. Am J Physiol Lung Cell Mol Physiol 2018; 314:L256-L275. [PMID: 29074488 PMCID: PMC5866501 DOI: 10.1152/ajplung.00096.2017] [Citation(s) in RCA: 101] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 10/16/2017] [Accepted: 10/18/2017] [Indexed: 12/26/2022] Open
Abstract
Pulmonary vascular remodeling characterized by concentric wall thickening and intraluminal obliteration is a major contributor to the elevated pulmonary vascular resistance in patients with idiopathic pulmonary arterial hypertension (IPAH). Here we report that increased hypoxia-inducible factor 2α (HIF-2α) in lung vascular endothelial cells (LVECs) under normoxic conditions is involved in the development of pulmonary hypertension (PH) by inducing endothelial-to-mesenchymal transition (EndMT), which subsequently results in vascular remodeling and occlusive lesions. We observed significant EndMT and markedly increased expression of SNAI, an inducer of EndMT, in LVECs from patients with IPAH and animals with experimental PH compared with normal controls. LVECs isolated from IPAH patients had a higher level of HIF-2α than that from normal subjects, whereas HIF-1α was upregulated in pulmonary arterial smooth muscle cells (PASMCs) from IPAH patients. The increased HIF-2α level, due to downregulated prolyl hydroxylase domain protein 2 (PHD2), a prolyl hydroxylase that promotes HIF-2α degradation, was involved in enhanced EndMT and upregulated SNAI1/2 in LVECs from patients with IPAH. Moreover, knockdown of HIF-2α (but not HIF-1α) with siRNA decreases both SNAI1 and SNAI2 expression in IPAH-LVECs. Mice with endothelial cell (EC)-specific knockout (KO) of the PHD2 gene, egln1 (egln1EC-/-), developed severe PH under normoxic conditions, whereas Snai1/2 and EndMT were increased in LVECs of egln1EC-/- mice. EC-specific KO of the HIF-2α gene, hif2a, prevented mice from developing hypoxia-induced PH, whereas EC-specific deletion of the HIF-1α gene, hif1a, or smooth muscle cell (SMC)-specific deletion of hif2a, negligibly affected the development of PH. Also, exposure to hypoxia for 48-72 h increased protein level of HIF-1α in normal human PASMCs and HIF-2α in normal human LVECs. These data indicate that increased HIF-2α in LVECs plays a pathogenic role in the development of severe PH by upregulating SNAI1/2, inducing EndMT, and causing obliterative pulmonary vascular lesions and vascular remodeling.
Collapse
Affiliation(s)
- Haiyang Tang
- Division of Translational and Regenerative Medicine, College of Medicine, University of Arizona , Tucson, Arizona
| | - Aleksandra Babicheva
- Division of Translational and Regenerative Medicine, College of Medicine, University of Arizona , Tucson, Arizona
| | - Kimberly M McDermott
- Division of Translational and Regenerative Medicine, College of Medicine, University of Arizona , Tucson, Arizona
| | - Yali Gu
- Division of Translational and Regenerative Medicine, College of Medicine, University of Arizona , Tucson, Arizona
| | - Ramon J Ayon
- Division of Translational and Regenerative Medicine, College of Medicine, University of Arizona , Tucson, Arizona
| | - Shanshan Song
- Division of Translational and Regenerative Medicine, College of Medicine, University of Arizona , Tucson, Arizona
| | - Ziyi Wang
- Division of Translational and Regenerative Medicine, College of Medicine, University of Arizona , Tucson, Arizona
| | - Akash Gupta
- Division of Cardiology, College of Medicine, University of Arizona , Tucson, Arizona
| | - Tong Zhou
- Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, Department of Medicine, College of Medicine, University of Arizona , Tucson, Arizona
| | - Xutong Sun
- Division of Translational and Regenerative Medicine, College of Medicine, University of Arizona , Tucson, Arizona
| | - Swetaleena Dash
- Division of Translational and Regenerative Medicine, College of Medicine, University of Arizona , Tucson, Arizona
| | - Zilu Wang
- Division of Translational and Regenerative Medicine, College of Medicine, University of Arizona , Tucson, Arizona
| | - Angela Balistrieri
- Division of Translational and Regenerative Medicine, College of Medicine, University of Arizona , Tucson, Arizona
| | - Qiuyu Zheng
- State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medicine University , Guangzhou , China
| | - Arlette G Cordery
- Division of Translational and Regenerative Medicine, College of Medicine, University of Arizona , Tucson, Arizona
| | - Ankit A Desai
- Division of Translational and Regenerative Medicine, College of Medicine, University of Arizona , Tucson, Arizona
- Division of Cardiology, College of Medicine, University of Arizona , Tucson, Arizona
| | - Franz Rischard
- Division of Translational and Regenerative Medicine, College of Medicine, University of Arizona , Tucson, Arizona
- Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, Department of Medicine, College of Medicine, University of Arizona , Tucson, Arizona
| | - Zain Khalpey
- Division of Translational and Regenerative Medicine, College of Medicine, University of Arizona , Tucson, Arizona
- Department of Surgery, College of Medicine, University of Arizona , Tucson, Arizona
| | - Jian Wang
- Division of Translational and Regenerative Medicine, College of Medicine, University of Arizona , Tucson, Arizona
- State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medicine University , Guangzhou , China
| | - Stephen M Black
- Division of Translational and Regenerative Medicine, College of Medicine, University of Arizona , Tucson, Arizona
| | - Joe G N Garcia
- Division of Translational and Regenerative Medicine, College of Medicine, University of Arizona , Tucson, Arizona
- Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, Department of Medicine, College of Medicine, University of Arizona , Tucson, Arizona
| | - Ayako Makino
- Division of Translational and Regenerative Medicine, College of Medicine, University of Arizona , Tucson, Arizona
- Department of Physiology, College of Medicine, University of Arizona , Tucson, Arizona
| | - Jason X-J Yuan
- Division of Translational and Regenerative Medicine, College of Medicine, University of Arizona , Tucson, Arizona
- Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, Department of Medicine, College of Medicine, University of Arizona , Tucson, Arizona
- Department of Physiology, College of Medicine, University of Arizona , Tucson, Arizona
| |
Collapse
|
19
|
Rada M, Althubiti M, Ekpenyong-Akiba AE, Lee KG, Lam KP, Fedorova O, Barlev NA, Macip S. BTK blocks the inhibitory effects of MDM2 on p53 activity. Oncotarget 2017; 8:106639-106647. [PMID: 29290977 PMCID: PMC5739762 DOI: 10.18632/oncotarget.22543] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Accepted: 10/30/2017] [Indexed: 12/29/2022] Open
Abstract
p53 is a tumour suppressor that is activated in response to various types of stress. It is regulated by a complex pattern of over 50 different post-translational modifications, including ubiquitination by the E3 ligase MDM2, which leads to its proteasomal degradation. We have previously reported that expression of Bruton’s Tyrosine Kinase (BTK) induces phosphorylation of p53 at the N-terminus, including Serine 15, and increases its protein levels and activity. The mechanisms involved in this process are not completely understood. Here, we show that BTK also increases MDM2 and is necessary for MDM2 upregulation after DNA damage, consistent with what we have shown for other p53 target genes. Moreover, we found that BTK binds to MDM2 on its PH domain and induces its phosphorylation. This suggested a negative regulation of MDM2 functions by BTK, supported by the fact BTK expression rescued the inhibitory effects of MDM2 on p53 transcriptional activity. Indeed, we observed that BTK mediated the loss of the ubiquitination activity of MDM2, a process that was dependent on the phosphorylation functions of BTK. Our data together shows that the kinase activity of BTK plays an important role in disrupting the MDM2-p53 negative feedback loop by acting at different levels, including binding to and inactivation of MDM2. This study provides a potential mechanism to explain how BTK modulates p53 functions.
Collapse
Affiliation(s)
- Miran Rada
- Department of Molecular and Cell Biology, Mechanisms of Cancer and Aging Laboratory, University of Leicester, Leicester, UK
| | - Mohammad Althubiti
- Department of Molecular and Cell Biology, Mechanisms of Cancer and Aging Laboratory, University of Leicester, Leicester, UK.,Department of Biochemistry, Faculty of Medicine, Umm Al-Qura University, Mecca, Saudi Arabia
| | - Akang E Ekpenyong-Akiba
- Department of Molecular and Cell Biology, Mechanisms of Cancer and Aging Laboratory, University of Leicester, Leicester, UK
| | - Koon-Guan Lee
- Bioprocessing Technology Institute, ASTAR, Singapore
| | - Kong Peng Lam
- Bioprocessing Technology Institute, ASTAR, Singapore
| | - Olga Fedorova
- Institute of Cytology, RAS, Saint-Petersburg, Russia
| | | | - Salvador Macip
- Department of Molecular and Cell Biology, Mechanisms of Cancer and Aging Laboratory, University of Leicester, Leicester, UK
| |
Collapse
|
20
|
Riffle S, Hegde RS. Modeling tumor cell adaptations to hypoxia in multicellular tumor spheroids. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2017; 36:102. [PMID: 28774341 PMCID: PMC5543535 DOI: 10.1186/s13046-017-0570-9] [Citation(s) in RCA: 112] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Accepted: 07/18/2017] [Indexed: 12/17/2022]
Abstract
Under hypoxic conditions, tumor cells undergo a series of adaptations that promote evolution of a more aggressive tumor phenotype including the activation of DNA damage repair proteins, altered metabolism, and decreased proliferation. Together these changes mitigate the negative impact of oxygen deprivation and allow preservation of genomic integrity and proliferative capacity, thus contributing to tumor growth and metastasis. As a result the presence of a hypoxic microenvironment is considered a negative clinical feature of many solid tumors. Hypoxic niches in tumors also represent a therapeutically privileged environment in which chemo- and radiation therapy is less effective. Although the negative impact of tumor hypoxia has been well established, the precise effect of oxygen deprivation on tumor cell behavior, and the molecular signals that allow a tumor cell to survive in vivo are poorly understood. Multicellular tumor spheroids (MCTS) have been used as an in vitro model for the avascular tumor niche, capable of more accurately recreating tumor genomic profiles and predicting therapeutic response. However, relatively few studies have used MCTS to study the molecular mechanisms driving tumor cell adaptations within the hypoxic tumor environment. Here we will review what is known about cell proliferation, DNA damage repair, and metabolic pathways as modeled in MCTS in comparison to observations made in solid tumors. A more precise definition of the cell populations present within 3D tumor models in vitro could better inform our understanding of the heterogeneity within tumors as well as provide a more representative platform for the testing of therapeutic strategies.
Collapse
Affiliation(s)
- Stephen Riffle
- Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, 3333 Burnet Avenue, Cincinnati, OH, 45229, USA
| | - Rashmi S Hegde
- Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, 3333 Burnet Avenue, Cincinnati, OH, 45229, USA.
| |
Collapse
|
21
|
Abstract
BACKGROUND Oxygen (O2) homeostasis is an indispensable requirement of eukaryotes. O2 concentration in cellular milieu is defined as normoxia (∼21% O2), physoxia (∼1-13% O2) or hypoxia (∼0.1-1% O2). Hypoxia, a striking micro-environmental feature in tumorigenesis, is countered by tumor cells via induction of O2 governed transcription factor, hypoxia inducible factor-1 (HIF-1). Post discovery, HIF-1 has emerged as a promising anticancer therapeutic target during the last two decades. Recent reports have highlighted that enhanced levels of HIF-1 correlate with tumor metastasis leading to poor patient prognosis. MATERIAL AND METHODS A systematic search in PubMed and SciFinder for the literature on HIF-1 biology and therapeutic importance in cancer was carried out. RESULTS This review highlights the initial description as well as the recent insights into HIF-1 biology and regulation. We have focused on emerging data regarding varied classes of HIF-1 target genes affecting various levels of crosstalk among tumorigenic pathways. We have emphasized on the fact that HIF-1 acts as a networking hub coordinating activities of multiple signaling molecules influencing tumorigenesis. Emerging evidences indicate role of many HIF-induced proteomic and genomic alterations in malignant progression by mediating a myriad of genes stimulating angiogenesis, anaerobic metabolism and survival of cancer cells in O2-deficient microenvironment. CONCLUSIONS Better understanding of the crucial role of HIF-1 in carcinogenesis could offer promising new avenues to researchers and aid in elucidating various open issues regarding the use of HIF-1 as an anticancer therapeutic target. In spite of large efforts in this field, many questions still remain unanswered. Hence, future investigations are necessary to devise, assess and refine methods for translating previous research efforts into novel clinical practices in cancer treatment.
Collapse
Affiliation(s)
- Sourabh Soni
- Pharmacology and Toxicology Lab, Food and Nutraceuticals Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, India
- Academy of Scientific and Innovative Research, New Delhi, India
| | - Yogendra S. Padwad
- Pharmacology and Toxicology Lab, Food and Nutraceuticals Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, India
- Academy of Scientific and Innovative Research, New Delhi, India
| |
Collapse
|
22
|
Bredell MG, Ernst J, El-Kochairi I, Dahlem Y, Ikenberg K, Schumann DM. Current relevance of hypoxia in head and neck cancer. Oncotarget 2016; 7:50781-50804. [PMID: 27434126 PMCID: PMC5226620 DOI: 10.18632/oncotarget.9549] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Accepted: 04/28/2016] [Indexed: 01/23/2023] Open
Abstract
Head and Neck cancer (HNC) is a complex mix of cancers and one of the more common cancers with a relatively poor prognosis. One of the factors that may assist us in predicting survival and allow us to adjust our treatment strategies is the presence of tumor hypoxia. In this overview we aim to evaluate the current evidence and potential clinical relevance of tumor hypoxia in head and neck cancer according to an extensive search of current literature.An abundance of evidence and often contradictory evidence is found in the literature. Even the contradictory evidence and comparisons are difficult to judge as criteria and methodologies differ greatly, furthermore few prospective observational studies exist for verification of the pre-clinical studies. Despite these discrepancies there is clear evidence of associations between prognosis and poor tumor oxygenation biomarkers such as HIF-1α, GLUT-1 and lactate, though these associations are not exclusive. The use of genetic markers is expanding and will probably lead to significantly more and complex evidence. The lack of oxygenation in head and neck tumors is of paramount importance for the prediction of treatment outcomes and prognosis. Despite the wide array of conflicting evidence, the drive towards non-invasive prediction of tumor hypoxia should continue.
Collapse
Affiliation(s)
- Marius G. Bredell
- Department of Cranio-, Maxillofacial and Oral Surgery, University Hospital Zürich, Zürich, Switzerland
| | - Jutta Ernst
- Department of Cranio-, Maxillofacial and Oral Surgery, University Hospital Zürich, Zürich, Switzerland
| | - Ilhem El-Kochairi
- Department of Cranio-, Maxillofacial and Oral Surgery, University Hospital Zürich, Zürich, Switzerland
| | - Yuliya Dahlem
- Department of Cranio-, Maxillofacial and Oral Surgery, University Hospital Zürich, Zürich, Switzerland
| | - Kristian Ikenberg
- Department of Pathology, University Hospital of Zürich, Zürich, Switzerland
| | - Desiree M. Schumann
- Department of Cranio-, Maxillofacial and Oral Surgery, University Hospital Zürich, Zürich, Switzerland
| |
Collapse
|
23
|
Althubiti M, Rada M, Samuel J, Escorsa JM, Najeeb H, Lee KG, Lam KP, Jones GDD, Barlev NA, Macip S. BTK Modulates p53 Activity to Enhance Apoptotic and Senescent Responses. Cancer Res 2016; 76:5405-14. [PMID: 27630139 DOI: 10.1158/0008-5472.can-16-0690] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Accepted: 06/28/2016] [Indexed: 11/16/2022]
Abstract
p53 is a tumor suppressor that prevents the emergence of transformed cells by inducing apoptosis or senescence, among other responses. Its functions are regulated tightly by posttranslational modifications. Here we show that Bruton's tyrosine kinase (BTK) is a novel modulator of p53. We found that BTK is induced in response to DNA damage and p53 activation. BTK induction leads to p53 phosphorylation, which constitutes a positive feedback loop that increases p53 protein levels and enhances the transactivation of its target genes in response to stress. Inhibiting BTK reduced both p53-dependent senescence and apoptosis. Further, BTK expression also upregulated DNA damage signals and apoptosis. We conclude that despite being involved in oncogenic signals in blood malignancies, BTK has antineoplastic properties in other contexts, such as the enhancement of p53's tumor suppressor responses. Along with evidence that BTK expression correlates with good prognosis in some epithelial tumors, our findings may encourage a reevaluation of the clinical uses of BTK inhibitors in cancer therapy. Cancer Res; 76(18); 5405-14. ©2016 AACR.
Collapse
Affiliation(s)
- Mohammad Althubiti
- Mechanisms of Cancer and Aging Laboratory, Department of Molecular and Cell Biology, University of Leicester, Leicester, United Kingdom. Cancer Research UK Leicester Centre, Leicester, United Kingdom. Department of Biochemistry, Faculty of Medicine, Umm Al-Qura University, Mecca, Saudi Arabia
| | - Miran Rada
- Mechanisms of Cancer and Aging Laboratory, Department of Molecular and Cell Biology, University of Leicester, Leicester, United Kingdom. Cancer Research UK Leicester Centre, Leicester, United Kingdom. Department of Biology, School of Science, Faculty of Science and Education Sciences, University of Sulaimani, Sulaimaniyah, Kurdistan Region, Iraq
| | - Jesvin Samuel
- Mechanisms of Cancer and Aging Laboratory, Department of Molecular and Cell Biology, University of Leicester, Leicester, United Kingdom. Cancer Research UK Leicester Centre, Leicester, United Kingdom
| | - Josep M Escorsa
- Mechanisms of Cancer and Aging Laboratory, Department of Molecular and Cell Biology, University of Leicester, Leicester, United Kingdom. Cancer Research UK Leicester Centre, Leicester, United Kingdom
| | - Hishyar Najeeb
- Cancer Research UK Leicester Centre, Leicester, United Kingdom. Department of Cancer Studies, University of Leicester, Leicester, United Kingdom
| | - Koon-Guan Lee
- Bioprocessing Technology Institute, A*STAR, Singapore
| | - Kong-Peng Lam
- Bioprocessing Technology Institute, A*STAR, Singapore
| | - George D D Jones
- Cancer Research UK Leicester Centre, Leicester, United Kingdom. Department of Cancer Studies, University of Leicester, Leicester, United Kingdom
| | | | - Salvador Macip
- Mechanisms of Cancer and Aging Laboratory, Department of Molecular and Cell Biology, University of Leicester, Leicester, United Kingdom. Cancer Research UK Leicester Centre, Leicester, United Kingdom.
| |
Collapse
|
24
|
Richards R, Jenkinson MD, Haylock BJ, See V. Cell cycle progression in glioblastoma cells is unaffected by pathophysiological levels of hypoxia. PeerJ 2016; 4:e1755. [PMID: 26966676 PMCID: PMC4782743 DOI: 10.7717/peerj.1755] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Accepted: 02/12/2016] [Indexed: 12/31/2022] Open
Abstract
Hypoxia is associated with the increased malignancy of a broad range of solid tumours. While very severe hypoxia has been widely shown to induce cell cycle arrest, the impact of pathophysiological hypoxia on tumour cell proliferation is poorly understood. The aim of this study was to investigate the effect of different oxygen levels on glioblastoma (GBM) cell proliferation and survival. GBM is an extremely aggressive brain tumour with a heterogeneous oxygenation pattern. The effects of a range of oxygen tensions on GBM cell lines and primary cells were assessed using flow cytometry. Results indicate that cell cycle distribution and viability are unaffected by long term exposure (24–96 h) to pathophysiological levels of oxygen (1–8% O2). Both transient cell cycle arrest and small amounts of cell death could only be detected when cells were exposed to severe hypoxia (0.1% O2). No significant changes in p21 protein expression levels were detected. These findings reinforce the importance of using physiologically relevant oxygen tensions when investigating tumour hypoxia, and help to explain how solid tumours can be both hypoxic and highly proliferative, as is the case with GBM.
Collapse
Affiliation(s)
- Rosalie Richards
- Institute of Integrative Biology, Department of Biochemistry, University of Liverpool , Liverpool , United Kingdom
| | - Michael D Jenkinson
- Institute of Translational Medicine, Clinical Science Centre, University of Liverpool , Liverpool , United Kingdom
| | - Brian J Haylock
- Department of Clinical Oncology, Clatterbridge Cancer Centre , Bebington , United Kingdom
| | - Violaine See
- Institute of Integrative Biology, Department of Biochemistry, University of Liverpool , Liverpool , United Kingdom
| |
Collapse
|
25
|
Sanhueza C, Wehinger S, Castillo Bennett J, Valenzuela M, Owen GI, Quest AFG. The twisted survivin connection to angiogenesis. Mol Cancer 2015; 14:198. [PMID: 26584646 PMCID: PMC4653922 DOI: 10.1186/s12943-015-0467-1] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Accepted: 11/08/2015] [Indexed: 12/15/2022] Open
Abstract
Survivin, a member of the inhibitor of apoptosis family of proteins (IAPs) that controls cell division, apoptosis, metastasis and angiogenesis, is overexpressed in essentially all human cancers. As a consequence, the gene/protein is considered an attractive target for cancer treatment. Here, we discuss recent findings related to the regulation of survivin expression and its role in angiogenesis, particularly in the context of hypoxia. We propose a novel role for survivin in cancer, whereby expression of the protein in tumor cells promotes VEGF synthesis, secretion and angiogenesis. Mechanistically, we propose the existence of a positive feed-back loop involving PI3-kinase/Akt activation and enhanced β-Catenin-TCF/LEF-dependent VEGF expression followed by secretion. Finally, we elaborate on the possibility that this mechanism operating in cancer cells may contribute to enhanced tumor vascularization by vasculogenic mimicry together with conventional angiogenesis.
Collapse
Affiliation(s)
- C Sanhueza
- Cellular and Molecular Physiology Laboratory (CMPL), Division of Obstetrics and Gynecology, School of Medicine, Faculty of Medicine, Pontificia Universidad Católica de Chile, Santiago, 8330024, Chile
| | - S Wehinger
- Interdisciplinary Excellence Research Program on Healthy Aging (PIEI-ES), Universidad de Talca, Talca, Chile
| | - J Castillo Bennett
- Cellular Communication Laboratory, Center for Molecular Studies of the Cell (CEMC), Program of Cell and Molecular Biology, Institute of Biomedical Sciences (ICBM), Faculty of Medicine, Av. Independencia 1027, Santiago, Chile.,Advanced Center for Chronic Diseases (ACCDiS), Santiago, Chile
| | - M Valenzuela
- Cellular Communication Laboratory, Center for Molecular Studies of the Cell (CEMC), Program of Cell and Molecular Biology, Institute of Biomedical Sciences (ICBM), Faculty of Medicine, Av. Independencia 1027, Santiago, Chile.,Advanced Center for Chronic Diseases (ACCDiS), Santiago, Chile
| | - G I Owen
- Advanced Center for Chronic Diseases (ACCDiS), Santiago, Chile.,Facultad de Ciencias Biológicas & Center UC Investigation in Oncology, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - A F G Quest
- Cellular Communication Laboratory, Center for Molecular Studies of the Cell (CEMC), Program of Cell and Molecular Biology, Institute of Biomedical Sciences (ICBM), Faculty of Medicine, Av. Independencia 1027, Santiago, Chile. .,Advanced Center for Chronic Diseases (ACCDiS), Santiago, Chile.
| |
Collapse
|
26
|
Hypoxia Inducible Factor Pathway and Physiological Adaptation: A Cell Survival Pathway? Mediators Inflamm 2015; 2015:584758. [PMID: 26491231 PMCID: PMC4600544 DOI: 10.1155/2015/584758] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Accepted: 12/28/2014] [Indexed: 12/14/2022] Open
Abstract
Oxygen homeostasis reflects the constant body requirement to generate energy. Hypoxia (0.1–1% O2), physioxia or physoxia (∼1–13%), and normoxia (∼20%) are terms used to define oxygen concentration in the cellular environment. A decrease in oxygen (hypoxia) or excess oxygen (hyperoxia) could be deleterious for cellular adaptation and survival. Hypoxia can occur under both physiological (e.g., exercise, embryonic development, underwater diving, or high altitude) and pathological conditions (e.g., inflammation, solid tumor formation, lung disease, or myocardial infarction). Hypoxia plays a key role in the pathophysiology of heart disease, cancers, stroke, and other causes of mortality. Hypoxia inducible factor(s) (HIFs) are key oxygen sensors that mediate the ability of the cell to cope with decreased oxygen tension. These transcription factors regulate cellular adaptation to hypoxia and protect cells by responding acutely and inducing production of endogenous metabolites and proteins to promptly regulate metabolic pathways. Here, we review the role of the HIF pathway as a metabolic adaptation pathway and how this pathway plays a role in cell survival. We emphasize the roles of the HIF pathway in physiological adaptation, cell death, pH regulation, and adaptation during exercise.
Collapse
|
27
|
Rodemann HP, Bodis S. Cutting-edge research in basic and translational radiation biology/oncology reflections from the 14th International Wolfsberg Meeting on Molecular Radiation Biology/Oncology 2015. Radiother Oncol 2015; 116:335-41. [DOI: 10.1016/j.radonc.2015.09.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Revised: 09/04/2015] [Accepted: 09/05/2015] [Indexed: 01/11/2023]
|