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Liu W, Zou M, Chen M, Zhang Z, Mao Y, Yang Y, Liu Y, Shi Q, Wang X, Zhang F. Hypoxic environment promotes angiogenesis and bone bridge formation by activating Notch/RBPJ signaling pathway in HUVECs. Genomics 2024; 116:110838. [PMID: 38537807 DOI: 10.1016/j.ygeno.2024.110838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 02/09/2024] [Accepted: 03/24/2024] [Indexed: 05/27/2024]
Abstract
After epiphyseal fracture, the epiphyseal plate is prone to ischemia and hypoxia, leading to the formation of bone bridge and deformity. However, the exact mechanism controlling the bone bridge formation remains unclear. Notch/RBPJ signaling axis has been indicated to regulate angiogenesis and osteogenic differentiation. Our study aims to investigate the mechanism of bone bridge formation after epiphyseal plate injury, and to provide a theoretical basis for new therapeutic approaches to prevent the bone bridge formation. The expression of DLL4 and RBPJ was significantly up-regulated in HUVECs after ischemia and hypoxia treatment. Notch/RBPJ pathway positively regulated the osteogenic differentiation of BMSCs. HUVECs can induce osteogenic differentiation of BMSCs under ischemia and hypoxia. Notch/RBPJ pathway is involved in the regulation of the trans-epiphyseal bridge formation. Notch/RBPJ in HUVECs is associated with osteogenic differentiation of BMSCs and may participate in the regulation of the bone bridge formation across the epiphyseal plate.
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Affiliation(s)
- Wendong Liu
- Department of Orthopaedics, Children's Hospital of Soochow University, 92 Zhongnan St., Suzhou 215000, Jiangsu Province, China; Clinical Pediatrics School, Soochow University, 92 Zhongnan St., Suzhou 215000, Jiangsu Province, China
| | - Mincheng Zou
- Department of Orthopaedics, Children's Hospital of Soochow University, 92 Zhongnan St., Suzhou 215000, Jiangsu Province, China; Clinical Pediatrics School, Soochow University, 92 Zhongnan St., Suzhou 215000, Jiangsu Province, China
| | - Mimi Chen
- Department of Orthopaedics, Children's Hospital of Soochow University, 92 Zhongnan St., Suzhou 215000, Jiangsu Province, China
| | - Zheng Zhang
- Department of Orthopaedics, Children's Hospital of Soochow University, 92 Zhongnan St., Suzhou 215000, Jiangsu Province, China
| | - Yunpeng Mao
- Department of Orthopaedics, Children's Hospital of Soochow University, 92 Zhongnan St., Suzhou 215000, Jiangsu Province, China
| | - Yuhao Yang
- Department of Orthopaedics, Children's Hospital of Soochow University, 92 Zhongnan St., Suzhou 215000, Jiangsu Province, China
| | - Ya Liu
- Department of Orthopaedics, Children's Hospital of Soochow University, 92 Zhongnan St., Suzhou 215000, Jiangsu Province, China
| | - Qin Shi
- Department of Orthopaedic Surgery, The First Affiliated Hospital of Soochow University, 188 Shizi St., Suzhou 215006, Jiangsu, China
| | - Xiaodong Wang
- Department of Orthopaedics, Children's Hospital of Soochow University, 92 Zhongnan St., Suzhou 215000, Jiangsu Province, China; Clinical Pediatrics School, Soochow University, 92 Zhongnan St., Suzhou 215000, Jiangsu Province, China
| | - Fuyong Zhang
- Department of Orthopaedics, Children's Hospital of Soochow University, 92 Zhongnan St., Suzhou 215000, Jiangsu Province, China.
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Monaci S, Coppola F, Filippi I, Falsini A, Carraro F, Naldini A. Targeting hypoxia signaling pathways in angiogenesis. Front Physiol 2024; 15:1408750. [PMID: 38725568 PMCID: PMC11079266 DOI: 10.3389/fphys.2024.1408750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Accepted: 04/10/2024] [Indexed: 05/12/2024] Open
Abstract
Oxygen (O2) supply is constantly maintained by the vascular network for a proper tissue oxygenation. Hypoxia is the result of an increased O2 demand and/or decreased supply and is common in both physiological conditions and human diseases. Angiogenesis is one of the adaptive responses to hypoxia and is mainly regulated by the hypoxia-inducible factors, HIFs. These heterodimeric transcription factors are composed of one of three O2-dependent α subunits (HIF-1, HIF-2, and HIF-3) and a constitutively expressed O2-insensitive subunit (HIF-1β). Among them HIF-1α is the most characterized and its activity is tightly controlled. Under hypoxia, its intracellular accumulation triggers the transcription of several genes, involved in cell survival/proliferation, autophagy, apoptosis, cell metabolism, and angiogenesis. HIF pathway is also modulated by specific microRNAs (miRNAs), thus resulting in the variation of several cellular responses, including alteration of the angiogenic process. The pro-angiogenic activity of HIF-1α is not restricted to endothelial cells, as it also affects the behavior of other cell types, including tumor and inflammatory/immune cells. In this context, exosomes play a crucial role in cell-cell communication by transferring bio-active cargos such as mRNAs, miRNAs, and proteins (e.g., VEGFA mRNA, miR210, HIF-1α). This minireview will provide a synopsis of the multiple factors able to modulate hypoxia-induced angiogenesis especially in the tumor microenvironment context. Targeting hypoxia signaling pathways by up-to-date approaches may be relevant in the design of therapeutic strategies in those pathologies where angiogenesis is dysregulated.
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Affiliation(s)
- Sara Monaci
- Cellular and Molecular Physiology Unit, Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy
| | - Federica Coppola
- Cellular and Molecular Physiology Unit, Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy
| | - Irene Filippi
- Cellular and Molecular Physiology Unit, Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy
| | - Alessandro Falsini
- Cellular and Molecular Physiology Unit, Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy
| | - Fabio Carraro
- Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Antonella Naldini
- Cellular and Molecular Physiology Unit, Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy
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Böpple K, Oren Y, Henry WS, Dong M, Weller S, Thiel J, Kleih M, Gaißler A, Zipperer D, Kopp HG, Aylon Y, Oren M, Essmann F, Liang C, Aulitzky WE. ATF3 characterizes aggressive drug-tolerant persister cells in HGSOC. Cell Death Dis 2024; 15:290. [PMID: 38658567 PMCID: PMC11043376 DOI: 10.1038/s41419-024-06674-x] [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: 07/18/2023] [Revised: 03/19/2024] [Accepted: 04/11/2024] [Indexed: 04/26/2024]
Abstract
High-grade serous ovarian cancer (HGSOC) represents the most common and lethal subtype of ovarian cancer. Despite initial response to platinum-based standard therapy, patients commonly suffer from relapse that likely originates from drug-tolerant persister (DTP) cells. We generated isogenic clones of treatment-naïve and cisplatin-tolerant persister HGSOC cells. In addition, single-cell RNA sequencing of barcoded cells was performed in a xenograft model with HGSOC cell lines after platinum-based therapy. Published single-cell RNA-sequencing data from neo-adjuvant and non-treated HGSOC patients and patient data from TCGA were analyzed. DTP-derived cells exhibited morphological alterations and upregulation of epithelial-mesenchymal transition (EMT) markers. An aggressive subpopulation of DTP-derived cells showed high expression of the stress marker ATF3. Knockdown of ATF3 enhanced the sensitivity of aggressive DTP-derived cells to cisplatin-induced cell death, implying a role for ATF3 stress response in promoting a drug tolerant persister cell state. Furthermore, single cell lineage tracing to detect transcriptional changes in a HGSOC cell line-derived xenograft relapse model showed that cells derived from relapsed solid tumors express increased levels of EMT and multiple endoplasmic reticulum (ER) stress markers, including ATF3. Single cell RNA sequencing of epithelial cells from four HGSOC patients also identified a small cell population resembling DTP cells in all samples. Moreover, analysis of TCGA data from 259 HGSOC patients revealed a significant progression-free survival advantage for patients with low expression of the ATF3-associated partial EMT genes. These findings suggest that increased ATF3 expression together with partial EMT promote the development of aggressive DTP, and thereby relapse in HGSOC patients.
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Affiliation(s)
- Kathrin Böpple
- Dr. Margarete Fischer-Bosch - Institute of Clinical Pharmacology and University of Tuebingen, Auerbachstr. 112, 70376, Stuttgart, Germany.
| | - Yaara Oren
- Department of Human Molecular Genetics & Biochemistry, Faculty of Medicine, Tel Aviv University, Tel Aviv-Yafo, Israel
| | - Whitney S Henry
- Whitehead Institute for Biomedical Research, 455 Main St., Cambridge, MA, 02142, USA
| | - Meng Dong
- Dr. Margarete Fischer-Bosch - Institute of Clinical Pharmacology and University of Tuebingen, Auerbachstr. 112, 70376, Stuttgart, Germany
| | - Sandra Weller
- Dr. Margarete Fischer-Bosch - Institute of Clinical Pharmacology and University of Tuebingen, Auerbachstr. 112, 70376, Stuttgart, Germany
- Robert Bosch Center for Tumor Diseases (RBCT), Auerbachstr. 110, 70376, Stuttgart, Germany
| | - Julia Thiel
- Dr. Margarete Fischer-Bosch - Institute of Clinical Pharmacology and University of Tuebingen, Auerbachstr. 112, 70376, Stuttgart, Germany
| | - Markus Kleih
- Dr. Margarete Fischer-Bosch - Institute of Clinical Pharmacology and University of Tuebingen, Auerbachstr. 112, 70376, Stuttgart, Germany
| | - Andrea Gaißler
- Dr. Margarete Fischer-Bosch - Institute of Clinical Pharmacology and University of Tuebingen, Auerbachstr. 112, 70376, Stuttgart, Germany
| | - Damaris Zipperer
- Dr. Margarete Fischer-Bosch - Institute of Clinical Pharmacology and University of Tuebingen, Auerbachstr. 112, 70376, Stuttgart, Germany
| | - Hans-Georg Kopp
- Robert Bosch Hospital, Auerbachstr. 110, 70376, Stuttgart, Germany
- Robert Bosch Center for Tumor Diseases (RBCT), Auerbachstr. 110, 70376, Stuttgart, Germany
| | - Yael Aylon
- Weizmann Institute of Science, 234 Herzl St, Rehovot, Israel
| | - Moshe Oren
- Weizmann Institute of Science, 234 Herzl St, Rehovot, Israel
| | - Frank Essmann
- Dr. Margarete Fischer-Bosch - Institute of Clinical Pharmacology and University of Tuebingen, Auerbachstr. 112, 70376, Stuttgart, Germany
- Robert Bosch Center for Tumor Diseases (RBCT), Auerbachstr. 110, 70376, Stuttgart, Germany
| | - Chunguang Liang
- Department of Bioinformatics, Biocenter Am Hubland, University of Wuerzburg, 97074, Wuerzburg, Germany.
- Institute of Immunology, Jena University Hospital, Friedrich-Schiller-University, Leutragraben 3, 07743, Jena, Germany.
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Ziganshina MM, Kulikova GV, Muminova KT, Shchegolev AI, Yarotskaya EL, Khodzhaeva ZS, Sukhikh GT. Features and Comparative Characteristics of Fucosylated Glycans Expression in Endothelial Glycocalyx of Placental Terminal Villi in Patients with Preeclampsia Treated with Different Antihypertensive Regimens. Int J Mol Sci 2023; 24:15611. [PMID: 37958597 PMCID: PMC10649041 DOI: 10.3390/ijms242115611] [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: 09/14/2023] [Revised: 10/18/2023] [Accepted: 10/23/2023] [Indexed: 11/15/2023] Open
Abstract
Antihypertensive therapy is an essential part of management of patients with preeclampsia (PE). Methyldopa (Dopegyt®) and nifedipine (Cordaflex®) are basic medications of therapy since they stabilize blood pressure without affecting the fetus. Their effect on the endothelium of placental vessels has not yet been studied. In this study, we analyzed the effect of antihypertensive therapy on the expression of fucosylated glycans in fetal capillaries of placental terminal villi in patients with early-onset PE (EOPE) and late-onset PE (LOPE), and determined correlation between their expression and mother's hemodynamic parameters, fetoplacental system, factors reflecting inflammatory response, and destructive processes in the endothelial glycocalyx (eGC). A total of 76 women were enrolled in the study: the comparison group consisted of 15 women with healthy pregnancy, and the main group comprised 61 women with early-onset and late-onset PE, who received one-component or two-component antihypertensive therapy. Hemodynamic status was assessed by daily blood pressure monitoring, dopplerometry of maternal placental and fetoplacental blood flows, and the levels of IL-18, IL-6, TNFα, galectin-3, endocan-1, syndecan-1, and hyaluronan in the blood of the mother. Expression of fucosylated glycans was assessed by staining placental sections with AAL, UEA-I, LTL lectins, and anti-LeY MAbs. It was found that (i) expression patterns of fucosylated glycans in eGC capillaries of placental terminal villi in EOPE and LOPE are characterized by predominant expression of structures with a type 2 core and have a similar pattern of quantitative changes, which seems to be due to the impact of one-component and two-component antihypertensive therapy on their expression; (ii) correlation patterns indicate interrelated changes in the molecular composition of eGC fucoglycans and indicators reflecting changes in maternal hemodynamics, fetoplacental hemodynamics, and humoral factors associated with eGC damage. The presented study is the first to demonstrate the features of placental eGC in women with PE treated with antihypertensive therapy. This study also considers placental fucoglycans as a functional part of the eGC, which affects hemodynamics in the mother-placenta-fetus system.
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Affiliation(s)
- Marina M. Ziganshina
- Laboratory of Clinical Immunology, National Medical Research Center for Obstetrics, Gynecology, and Perinatology Named after Academician V.I. Kulakov of the Ministry of Health of the Russian Federation, Oparina Str. 4, 117997 Moscow, Russia;
| | - Galina V. Kulikova
- Department of Perinatal Pathology, National Medical Research Center for Obstetrics, Gynecology, and Perinatology Named after Academician V.I. Kulakov of the Ministry of Health of the Russian Federation, Oparina Str. 4, 117997 Moscow, Russia; (G.V.K.); (A.I.S.)
| | - Kamilla T. Muminova
- High Risk Pregnancy Department, National Medical Research Center for Obstetrics, Gynecology, and Perinatology Named after Academician V.I. Kulakov of the Ministry of Health of the Russian Federation, Oparina Str. 4, 117997 Moscow, Russia; (K.T.M.); (Z.S.K.)
| | - Alexander I. Shchegolev
- Department of Perinatal Pathology, National Medical Research Center for Obstetrics, Gynecology, and Perinatology Named after Academician V.I. Kulakov of the Ministry of Health of the Russian Federation, Oparina Str. 4, 117997 Moscow, Russia; (G.V.K.); (A.I.S.)
| | - Ekaterina L. Yarotskaya
- Department of International Cooperation, National Medical Research Center for Obstetrics, Gynecology, and Perinatology Named after Academician V.I. Kulakov of the Ministry of Health of the Russian Federation, Oparina Str. 4, 117997 Moscow, Russia;
| | - Zulfiya S. Khodzhaeva
- High Risk Pregnancy Department, National Medical Research Center for Obstetrics, Gynecology, and Perinatology Named after Academician V.I. Kulakov of the Ministry of Health of the Russian Federation, Oparina Str. 4, 117997 Moscow, Russia; (K.T.M.); (Z.S.K.)
| | - Gennady T. Sukhikh
- Laboratory of Clinical Immunology, National Medical Research Center for Obstetrics, Gynecology, and Perinatology Named after Academician V.I. Kulakov of the Ministry of Health of the Russian Federation, Oparina Str. 4, 117997 Moscow, Russia;
- Department of Obstetrics, Gynecology, Perinatology and Reproductology, Faculty for Postgraduate and Advanced Training of Physicians, I.M. Sechenov First Moscow State Medical University of the Ministry of Health of the Russian Federation (Sechenov University), 119991 Moscow, Russia
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Kapanadze T, Gamrekelashvili J, Sablotny S, Kijas D, Haller H, Schmidt-Ott K, Limbourg FP. CSF-1 and Notch signaling cooperate in macrophage instruction and tissue repair during peripheral limb ischemia. Front Immunol 2023; 14:1240327. [PMID: 37691936 PMCID: PMC10484478 DOI: 10.3389/fimmu.2023.1240327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 08/14/2023] [Indexed: 09/12/2023] Open
Abstract
Ischemia causes an inflammatory response featuring monocyte-derived macrophages (MF) involved in angiogenesis and tissue repair. Angiogenesis and ischemic macrophage differentiation are regulated by Notch signaling via Notch ligand Delta-like 1 (Dll1). Colony stimulating factor 1 (CSF-1) is an essential MF lineage factor, but its role in ischemic macrophage development and the interaction with Notch signaling is so far unclear. Using a mouse model of hind limb ischemia with CSF-1 inhibitor studies and Dll1 heterozygous mice we show that CSF-1 is induced in the ischemic niche by a subpopulation of stromal cells expressing podoplanin, which was paralleled by the development of ischemic macrophages. Inhibition of CSF-1 signaling with small molecules or blocking antibodies impaired macrophage differentiation but prolonged the inflammatory response, resulting in impaired perfusion recovery and tissue regeneration. Yet, despite high levels of CSF-1, macrophage maturation and perfusion recovery were impaired in mice with Dll1 haploinsufficiency, while inflammation was exaggerated. In vitro, CSF-1 was not sufficient to induce full MF differentiation from donor monocytes in the absence of recombinant DLL1, while the presence of DLL1 in a dose-dependent manner stimulated MF differentiation in combination with CSF-1. Thus, CSF-1 is an ischemic niche factor that cooperates with Notch signaling in a non-redundant fashion to instruct macrophage cell fate and maturation, which is required for ischemic perfusion recovery and tissue repair.
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Affiliation(s)
- Tamar Kapanadze
- Vascular Medicine Research, Hannover Medical School, Hannover, Germany
- Department of Nephrology and Hypertension, Hannover Medical School, Hannover, Germany
| | - Jaba Gamrekelashvili
- Vascular Medicine Research, Hannover Medical School, Hannover, Germany
- Department of Nephrology and Hypertension, Hannover Medical School, Hannover, Germany
| | - Stefan Sablotny
- Vascular Medicine Research, Hannover Medical School, Hannover, Germany
- Department of Nephrology and Hypertension, Hannover Medical School, Hannover, Germany
| | - Dustin Kijas
- Vascular Medicine Research, Hannover Medical School, Hannover, Germany
- Department of Nephrology and Hypertension, Hannover Medical School, Hannover, Germany
| | - Hermann Haller
- Department of Nephrology and Hypertension, Hannover Medical School, Hannover, Germany
| | - Kai Schmidt-Ott
- Department of Nephrology and Hypertension, Hannover Medical School, Hannover, Germany
| | - Florian P. Limbourg
- Vascular Medicine Research, Hannover Medical School, Hannover, Germany
- Department of Nephrology and Hypertension, Hannover Medical School, Hannover, Germany
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Mahapatra C, Kumar P, Paul MK, Kumar A. Angiogenic stimulation strategies in bone tissue regeneration. Tissue Cell 2022; 79:101908. [DOI: 10.1016/j.tice.2022.101908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 03/24/2022] [Accepted: 08/22/2022] [Indexed: 11/28/2022]
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Tran KA, Baldwin-Leclair A, DeOre BJ, Antisell M, Galie PA. Oxygen gradients dictate angiogenesis but not barriergenesis in a 3D brain microvascular model. J Cell Physiol 2022; 237:3872-3882. [PMID: 35901247 DOI: 10.1002/jcp.30840] [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: 02/08/2022] [Revised: 06/01/2022] [Accepted: 07/12/2022] [Indexed: 11/10/2022]
Abstract
A variety of biophysical properties are known to regulate angiogenic sprouting, and in vitro systems can parse the individual effects of these factors in a controlled setting. Here, a three-dimensional brain microvascular model interrogates how variables including extracellular matrix composition, fluid shear stress, and radius of curvature affect angiogenic sprouting of cerebral endothelial cells. Tracking endothelial migration over several days reveals that application of fluid shear stress and enlarged vessel radius of curvature both attenuate sprouting. Computational modeling informed by oxygen consumption assays suggests that sprouting correlates to reduced oxygen concentration: both fluid shear stress and vessel geometry alter the local oxygen levels dictated by both ambient conditions and cellular respiration. Moreover, increasing cell density and consequently lowering the local oxygen levels yields significantly more sprouting. Further analysis reveals that the magnitude of oxygen concentration is not as important as its spatial concentration gradient: decreasing ambient oxygen concentration causes significantly less sprouting than applying an external oxygen gradient to the vessels. In contrast, barriergenesis is dictated by shear stress independent of local oxygen concentrations, suggesting that different mechanisms mediate angiogenesis and barrier formation and that angiogenic sprouting can occur without compromising the barrier. Overall, these results improve our understanding of how specific biophysical variables regulate the function and activation of cerebral vasculature, and identify spatial oxygen gradients as the driving factor of angiogenesis in the brain.
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Affiliation(s)
- Kiet A Tran
- Department of Biomedical Engineering, Rowan University, Glassboro, New Jersey, USA
| | | | - Brandon J DeOre
- Department of Biomedical Engineering, Rowan University, Glassboro, New Jersey, USA
| | - Morgan Antisell
- Department of Biomedical Engineering, Rowan University, Glassboro, New Jersey, USA
| | - Peter A Galie
- Department of Biomedical Engineering, Rowan University, Glassboro, New Jersey, USA
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Effects of Ultrafine Single-Nanometer Oxygen Bubbles on Radiation Sensitivity in a Tumor-Bearing Mouse Model. Int J Mol Sci 2022; 23:ijms23126838. [PMID: 35743281 PMCID: PMC9224848 DOI: 10.3390/ijms23126838] [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: 04/30/2022] [Revised: 06/09/2022] [Accepted: 06/17/2022] [Indexed: 12/02/2022] Open
Abstract
Radiation therapy against cancer cells often causes radiation resistance via accumulation of hypoxia-inducible factor 1 subunit alpha (HIF-1α) under hypoxic conditions and severe side effects. Radiation sensitizers without side effects are required to overcome hypoxia-induced radiation resistance and decrease radiation-related side effects in patients with refractory cancer. We previously developed oxygen nanobubble water (NBO2 water) and demonstrated that it suppresses hypoxia-induced radiation resistance in cancer cell lines within the single-nanometer range. This study aimed to elucidate whether NBO2 water could act as a radiosensitizer via regulation of HIF-1α in a tumor-bearing mouse model. Six-week-old female BALB/c mice subcutaneously injected with tumor cells received control water or NBO2 water for 28 days, after which biochemical examinations and radiation treatment were performed. Hypoxic tumor regions were detected immunohistochemically. We found that NBO2 water sensitized radiation reactivity in the xenografted tumors. Notably, NBO2 water administration downregulated the accumulation of HIF-1α in xenografted tumors and did not affect the vital organs of healthy mice. The combination of radiation and single-nanometer NBO2 water without severe side effects may be a promising therapeutic option to improve radiation sensitivity in cancer patients without tolerance to invasive treatments.
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Nangole FW, Agak G. The effects of negative pressure wound therapy on wounds with cerebrospinal fluid leakages. J Wound Care 2022; 31:348-351. [DOI: 10.12968/jowc.2022.31.4.348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Objective: Negative pressure wound therapy (NPWT) has been widely used for a variety of wounds with good outcomes. However, it is contraindicated in the management of wounds with cerebrospinal fluid (CSF) leakages. The reason is the fear of a sudden shift of CSF fluid as a result of suction leading to brain herniation or coning. There is a paucity of data to either support or negate such claims. We aimed to determine the effect of NPWT in the management of patients with wounds with CSF leakages. Method: This was a longitudinal prospective study of patients having wounds with CSF leakages managed with NPWT in our institute. Outcome measures evaluated were changes in the level of consciousness, Glasgow Coma Scale (GCS) score, length of hospital stay, mean effluent collected, time taken for the wounds to heal/close and complications related to NPWT. Results: A total of 12 patients with wounds that had CSF leakage were managed with NPWT over two years. Of the patients, nine had wounds in communication with the brain, with three patients having spinal cord wounds. The average effluent collected on the first day of applying NPWT was 510ml, and by the third day this had fallen to approximately 200ml. The mean time taken for wounds to close was 12.3 days. There was no evidence of herniation nor any other morbidities or mortalities reported in any of our patients. Conclusion: NPWT, as indicated in this series, had a beneficial effect in the management of wounds with CSF leakage. NPWT, once applied to the wound, caused a tamponade effect that resulted in stoppage of the leakage of the CSF and did not lead to suction of the fluid, as previously thought. The dressings ensured an airtight system, preventing communication between the wound and the external environment, thus reducing sepsis while awaiting definitive wound closure.
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Affiliation(s)
| | - George Agak
- Division of Dermatology, David Geffen School of Medicine, University of California, Los Angeles, CA, US
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Nishi K, Haji T, Matsumoto T, Hayakawa C, Maeda K, Okano S, Yokoo T, Iwai S. Timing urinary tract reconstruction in rats to avoid hydronephrosis and fibrosis in the transplanted fetal metanephros as assessed using imaging. PLoS One 2021; 16:e0231233. [PMID: 33449930 PMCID: PMC7810319 DOI: 10.1371/journal.pone.0231233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Accepted: 12/29/2020] [Indexed: 11/18/2022] Open
Abstract
Chronic kidney disease leads to high morbidity rates among humans. Kidney transplantation is often necessary for severe symptoms; however, options for new curative treatments are desired because of donor shortage. For example, it has been established that the kidneys can efficiently generate urine after transplantation of the metanephros, ureter, and bladder as a group. After transplantation, the urine can indirectly flow into the recipient's bladder using a stepwise peristaltic ureter system method where the anastomosis is created via the recipient's ureter for urinary tract reconstruction. However, the growth of the regenerated metanephros varies significantly, whereas the time window for successful completion of the stepwise peristaltic ureter system that does not cause hydronephrosis of the metanephros with bladder (ureter) is quite narrow. Therefore, this study was conducted to periodically and noninvasively evaluate the growth of the transplanted metanephros, ureter, and bladder in rats through computed tomography and ultrasonography. The ultrasonographic findings highly correlated to the computed tomography findings and clearly showed the metanephros and bladder. We found that the degree of growth of the metanephros and the bladder after transplantation differed in each case. Most of the rats were ready for urinary tract reconstruction within 21 days after transplantation. Optimizing the urinary tract reconstruction using ultrasonography allowed for interventions to reduce long-term tubular dilation of the metanephros due to inhibited overdilation of the fetal bladder, thereby decreasing the fibrosis caused possibly by transforming growth factor-β1. These results may be significantly related to the long-term maturation of the fetal metanephros and can provide new insights into the physiology of transplant regeneration of the metanephros in higher animals. Thus, this study contributes to the evidence base for the possibility of kidney regeneration in human clinical trials.
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Affiliation(s)
- Kotaro Nishi
- Laboratory of Small Animal Surgery 2, School of Veterinary Medicine, Kitasato University, Towada, Aomori, Japan
| | - Takafumi Haji
- Laboratory of Small Animal Surgery 2, School of Veterinary Medicine, Kitasato University, Towada, Aomori, Japan
| | - Takuya Matsumoto
- Laboratory of Small Animal Surgery 2, School of Veterinary Medicine, Kitasato University, Towada, Aomori, Japan
| | - Chisato Hayakawa
- Laboratory of Small Animal Surgery 2, School of Veterinary Medicine, Kitasato University, Towada, Aomori, Japan
| | - Kenichi Maeda
- Laboratory of Small Animal Surgery 2, School of Veterinary Medicine, Kitasato University, Towada, Aomori, Japan
| | - Shozo Okano
- Laboratory of Small Animal Surgery 2, School of Veterinary Medicine, Kitasato University, Towada, Aomori, Japan
| | - Takashi Yokoo
- Division of Nephrology and Hypertension, Department of Internal Medicine, The Jikei University School of Medicine, Minato-ku, Tokyo, Japan
- Meiji University International Institute for Bio-Resource Research, Kawasaki, Kanagawa, Japan
| | - Satomi Iwai
- Laboratory of Small Animal Surgery 2, School of Veterinary Medicine, Kitasato University, Towada, Aomori, Japan
- Meiji University International Institute for Bio-Resource Research, Kawasaki, Kanagawa, Japan
- * E-mail:
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Vedenko A, Panara K, Goldstein G, Ramasamy R, Arora H. Tumor Microenvironment and Nitric Oxide: Concepts and Mechanisms. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1277:143-158. [PMID: 33119871 DOI: 10.1007/978-3-030-50224-9_10] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The cancer tissue exists not as a single entity, but as a combination of different cellular phenotypes which, taken together, dramatically contribute to the entirety of their ecosystem, collectively termed as the tumor microenvironment (TME). The TME is composed of both immune and nonimmune cell types, stromal components, and vasculature-all of which cooperate to promote cancer progression. Not all immune cells, however, are immune-suppressive; some of them can promote the immune microenvironment to fight the invading and uncontrollably dividing cell populations at the initial stages of tumor growth. Yet, many of these processes and cellular phenotypes fall short, and the immune ecosystem more often than not ends up stabilizing in favor of the "resistant" resident cells that begin clonal expansion and may progress to metastatic forms. Stromal components, making up the extracellular matrix and basement membrane, are also not the most innocuous: CAFs embedded throughout secrete proteases that allow the onset of one of the most invasive processes-angiogenesis-through destruction of the ECM and the basement membrane. Vasculature formation, because of angiogenesis, is the largest invader of the TME and the reason metastasis happens. Vasculature is so sporadic and omnipresent in the TME that most drug therapies are mainly focused on stopping this uncontrollable process. As the tumor continues to grow, different processes are constantly supplying it with the ingredients favorable for tumor progression and eventual metastasis. For example, angiogenesis promotes blood vessel formation that will allow the bona fide escape of tumor cells to take place. Another process like hypoxia will present itself in several forms throughout the tumor (mild or acute, cycling or permanent), starting mechanisms such as epithelial to mesenchymal transitions (EMT) of resident cells and inadvertently placing the cells in such a stressful condition that production of ROS and DNA damage is unavoidable. DNA damage can induce mutagenicity while allowing resistant cells to survive. This is where drugs and treatments can subsequently suffer in effectiveness. Finally, another molecule has just surfaced as being a very important player in the TME: nitric oxide. Often overlooked and equated with ROS and initially assigned in the category of pathogenic molecules, nitric oxide can definitely do some damage by causing metabolic reprogramming and promotion of immunosuppressive phenotypes at low concentrations. However, its actions seem to be extremely dose-dependent, and this issue has become a hot target of current treatment goals. Shockingly, nitric oxide, although omnipresent in the TME, can have a positive effect on targeting the TME broadly. Thus, while the TME is a myriad of cellular phenotypes and a combination of different tumor-promoting processes, each process is interconnected into one whole: the tumor microenvironment.
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Affiliation(s)
- Anastasia Vedenko
- Department of Urology, Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Kush Panara
- The Interdisciplinary Stem Cell Institute, University of Miami, Miller School of Medicine, Miami, FL, USA
| | - Gabriella Goldstein
- College of Health Professions and Sciences, University of Central Florida, Orlando, FL, USA
| | - Ranjith Ramasamy
- Department of Urology, Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Himanshu Arora
- Department of Urology, Miller School of Medicine, University of Miami, Miami, FL, USA.
- The Interdisciplinary Stem Cell Institute, University of Miami, Miller School of Medicine, Miami, FL, USA.
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12
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Nour S, Imani R, Chaudhry GR, Sharifi AM. Skin wound healing assisted by angiogenic targeted tissue engineering: A comprehensive review of bioengineered approaches. J Biomed Mater Res A 2020; 109:453-478. [PMID: 32985051 DOI: 10.1002/jbm.a.37105] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 09/23/2020] [Accepted: 09/26/2020] [Indexed: 12/16/2022]
Abstract
Skin injuries and in particular, chronic wounds, are one of the major prevalent medical problems, worldwide. Due to the pivotal role of angiogenesis in tissue regeneration, impaired angiogenesis can cause several complications during the wound healing process and skin regeneration. Therefore, induction or promotion of angiogenesis can be considered as a promising approach to accelerate wound healing. This article presents a comprehensive overview of current and emerging angiogenesis induction methods applied in several studies for skin regeneration, which are classified into the cell, growth factor, scaffold, and biological/chemical compound-based strategies. In addition, the advantages and disadvantages of these angiogenic strategies along with related research examples are discussed in order to demonstrate their potential in the treatment of wounds.
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Affiliation(s)
- Shirin Nour
- Department of Biomedical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
| | - Rana Imani
- Department of Biomedical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
| | - G Rasul Chaudhry
- OU-WB Institute for Stem Cell and Regenerative Medicine, Department of Biological Sciences, Oakland University, Rochester, Michigan, USA
| | - Ali Mohammad Sharifi
- Stem Cell and Regenerative Medicine Research Center, Iran University of Medical Sciences, Tehran, Iran.,Tissue Engineering Group (NOCERAL), Department of Orthopedics Surgery, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.,Department of Tissue Engineering and Regenerative Medicine, School of Advanced Technologies in Medicine, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
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13
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Boufraqech M, Nilubol N. Multi-omics Signatures and Translational Potential to Improve Thyroid Cancer Patient Outcome. Cancers (Basel) 2019; 11:cancers11121988. [PMID: 31835496 PMCID: PMC6966476 DOI: 10.3390/cancers11121988] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Accepted: 12/03/2019] [Indexed: 02/07/2023] Open
Abstract
Recent advances in high-throughput molecular and multi-omics technologies have improved our understanding of the molecular changes associated with thyroid cancer initiation and progression. The translation into clinical use based on molecular profiling of thyroid tumors has allowed a significant improvement in patient risk stratification and in the identification of targeted therapies, and thereby better personalized disease management and outcome. This review compiles the following: (1) the major molecular alterations of the genome, epigenome, transcriptome, proteome, and metabolome found in all subtypes of thyroid cancer, thus demonstrating the complexity of these tumors and (2) the great translational potential of multi-omics studies to improve patient outcome.
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Wei H, Duan Y, Gou W, Cui J, Ning H, Li D, Qin Y, Liu Q, Li Y. Design, synthesis and biological evaluation of novel 4-anilinoquinazoline derivatives as hypoxia-selective EGFR and VEGFR-2 dual inhibitors. Eur J Med Chem 2019; 181:111552. [DOI: 10.1016/j.ejmech.2019.07.055] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 07/10/2019] [Accepted: 07/19/2019] [Indexed: 12/13/2022]
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15
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Hypoxia Induced Heparan Sulfate Primes the Extracellular Matrix for Endothelial Cell Recruitment by Facilitating VEGF-Fibronectin Interactions. Int J Mol Sci 2019; 20:ijms20205065. [PMID: 31614727 PMCID: PMC6829205 DOI: 10.3390/ijms20205065] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 10/07/2019] [Accepted: 10/09/2019] [Indexed: 12/20/2022] Open
Abstract
Vascular endothelial growth factor-A (VEGF) is critical for the development, growth, and survival of blood vessels. Retinal pigmented epithelial (RPE) cells are a major source of VEGF in the retina, with evidence that the extracellular matrix (ECM)-binding forms are particularly important. VEGF associates with fibronectin in the ECM to mediate distinct signals in endothelial cells that are required for full angiogenic activity. Hypoxia stimulates VEGF expression and angiogenesis; however, little is known about whether hypoxia also affects VEGF deposition within the ECM. Therefore, we investigated the role of hypoxia in modulating VEGF-ECM interactions using a primary retinal cell culture model. We found that retinal endothelial cell attachment to RPE cell layers was enhanced in cells maintained under hypoxic conditions. Furthermore, we found that agents that disrupt VEGF-fibronectin interactions inhibited endothelial cell attachment to RPE cells. We also found that hypoxia induced a general change in the chemical structure of the HS produced by the RPE cells, which correlated to changes in the deposition of VEGF in the ECM, and we further identified preferential binding of VEGFR2 over VEGFR1 to VEGF laden-fibronectin matrices. Collectively, these results indicate that hypoxia-induced HS may prime fibronectin for VEGF deposition and endothelial cell recruitment by promoting VEGF-VEGFR2 interactions as a potential means to control angiogenesis in the retina and other tissues.
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Hasegawa T, Miyamoto-Takasaki Y, Abe M, Qiu Z, Yamamoto T, Yoshida T, Yoshino H, Hongo H, Yokoyama A, Sasaki M, Kuroshima S, Hara K, Kobayashi M, Akiyama Y, Maeda T, Luiz de Freitas PH, Li M, Amizuka N. Histochemical examination on principal collagen fibers in periodontal ligaments of ascorbic acid-deficient ODS-od/od rats. Microscopy (Oxf) 2019; 68:349-358. [PMID: 31271212 DOI: 10.1093/jmicro/dfz021] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 04/24/2019] [Indexed: 12/13/2022] Open
Abstract
In this study, we aimed to clarify the role of ascorbic acid in collagen synthesis in periodontal ligaments using osteogenic disorder Shionogi (ODS)/ShiJcl-od/od rats lacking L-gulonolactone oxidase. These rats cannot synthesize ascorbic acid in vivo. Eight-week-old ODS/ShiJcl-od/od male rats were administered ascorbic acid solution at a concentration of 200 mg/dL (control group, n = 6) or ascorbic acid solution at concentration of 0.3 mg/dL (insufficient group, n = 12). Six rats of the insufficient group were then given with ascorbic acid solution at concentration of 200 mg/dL for additional 3 weeks (rescued group, n = 6), and then, their mandibles were histochemically examined. Consequently, the insufficient group specimens were seen to possess fewer collagen fibers, and silver impregnation revealed numerous fine, reticular fiber-like fibrils branching off from collagen in the periodontal ligaments. In control group, faint immunoreactivities for matrix metalloproteinase (MMP)2 and cathepsin H were seen in the periphery of blood vessels and throughout the ligament, respectively. In contrast, in the insufficient group, intense MMP2-immunoreactivity was observed to be associated with collagen fibrils in the periodontal ligaments, and cathepsin H-immunopositivity was seen in ligamentous cells. The rescued group showed abundant collagen fibers filling the periodontal ligament space. Under transmission electron microscopy, ligamentous fibroblasts incorporated collagen fibrils into tubular endosomes/lysosomes while simultaneously synthesizing collagen fibril bundles. Thus, ascorbic acid insufficiency affected the immunolocalization of cathepsin H and MMP2; however, ligamentous fibroblasts appear to possess the potential to synthesize collagen fibers when supplied with ascorbic acid.
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Affiliation(s)
- Tomoka Hasegawa
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Sapporo Japan
| | - Yukina Miyamoto-Takasaki
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Sapporo Japan
| | - Miki Abe
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Sapporo Japan
| | - Zixuan Qiu
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Sapporo Japan
| | - Tomomaya Yamamoto
- Section of Dentistry, Japan Ground Self-Defense Forces Camp Asaka, Tokyo, Japan
| | - Taiji Yoshida
- School of Dental Medicine, Hokkaido University, Sapporo Japan
| | - Hirona Yoshino
- School of Dental Medicine, Hokkaido University, Sapporo Japan
| | - Hiromi Hongo
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Sapporo Japan
| | - Ayako Yokoyama
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Sapporo Japan.,Gerodontology, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Sapporo Japan
| | - Muneteru Sasaki
- Department of Applied Prosthodontics, Medical and Dental Sciences, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Shinichiro Kuroshima
- Department of Applied Prosthodontics, Medical and Dental Sciences, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Kuniko Hara
- Pharmacological Evaluation Section, Eisai, Co. Ltd, Tokyo, Japan
| | | | - Yasuhiro Akiyama
- Pharmacological Evaluation Section, Eisai, Co. Ltd, Tokyo, Japan
| | - Takeyasu Maeda
- Center for Advanced Oral Science, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan.,Faculty of Dental Medicine, University of Airlangga, Surabaya, Indonesia
| | | | - Minqi Li
- Division of Basic Science of Stomatology, The School of Stomatology, Shandong University, Jinan, China
| | - Norio Amizuka
- Developmental Biology of Hard Tissue, Graduate School of Dental Medicine and Faculty of Dental Medicine, Hokkaido University, Sapporo Japan
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17
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Ohkawara H, Miyagawa S, Fukushima S, Yajima S, Saito A, Nagashima H, Sawa Y. Development of a vitrification method for preserving human myoblast cell sheets for myocardial regeneration therapy. BMC Biotechnol 2018; 18:56. [PMID: 30200961 PMCID: PMC6131806 DOI: 10.1186/s12896-018-0467-5] [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: 05/05/2018] [Accepted: 09/03/2018] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Tissue-engineered cardiac constructs have potential in the functional recovery of heart failure; however, the preservation of these constructs is crucial for the development and widespread application of this treatment. We hypothesized that tissue-engineered skeletal myoblast (SMB) constructs may be preserved by vitrification to conserve biological function and structure. RESULTS Scaffold-free cardiac cell-sheet constructs were prepared from SMBs and immersed in a vitrification solution containing ethylene glycol, sucrose, and carboxyl poly-L-lysine. The cell sheet was wrapped in a thin film and frozen rapidly above liquid nitrogen to achieve vitrification (vitrification group, n = 8); fresh, untreated SMB sheets (fresh group, n = 8) were used as the control. The cryopreserved SMB sheets were thawed at 2 days, 1 week, 1 month, and 3 months after cryopreservation for assessment. Thawed, cryopreserved SMB sheets were transplanted into rat hearts in a myocardial infarction nude rat model, and their effects on cardiac function were evaluated. Cell viability in the cardiac constructs of the vitrification group was comparable to that of the fresh group, independent of the period of cryopreservation (p > 0.05). The structures of the cell-sheet constructs, including cell-cell junctions such as desmosomes, extracellular matrix, and cell membranes, were maintained in the vitrification group for 3 months. The expression of cytokine genes and extracellular matrix proteins (fibronectin, collagen I, N-cadherin, and integrin α5) showed similar levels in the vitrification and fresh groups. Moreover, in an in vivo experiment, the ejection fraction was significantly improved in animals treated with the fresh or cryopreserved constructs as compared to that in the sham-treated group (p < 0.05). CONCLUSIONS Overall, these results show that the vitrification method proposed here preserves the functionality and structure of scaffold-free cardiac cell-sheet constructs using human SMBs after thawing, suggesting the potential clinical application of this method in cell-sheet therapy.
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Affiliation(s)
- Hirotatsu Ohkawara
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Shigeru Miyagawa
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Satsuki Fukushima
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Shin Yajima
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Atsuhiro Saito
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Hiroshi Nagashima
- Laboratory of Developmental Engineering, Department of Life Sciences, School of Agriculture, Meiji University, Tama-ku, Kawasaki, Kanagawa, Japan
| | - Yoshiki Sawa
- Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
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18
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Wen Y, Chen R, Zhu C, Qiao H, Liu Y, Ji H, Miao J, Chen L, Liu X, Yang Y. MiR-503 suppresses hypoxia-induced proliferation, migration and angiogenesis of endothelial progenitor cells by targeting Apelin. Peptides 2018; 105:58-65. [PMID: 29800588 DOI: 10.1016/j.peptides.2018.05.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 05/15/2018] [Accepted: 05/20/2018] [Indexed: 01/08/2023]
Abstract
Endothelial progenitor cells (EPCs) are of great importance in the process of endogenous blood vessel repair to maintain endothelial integrity and have been applied in a wide range of models of ischemic diseases. MicroRNAs represent a class of non-protein coding endogenous RNAs with 19-24 nucleotides in length and serve an important role in multiple physiological and pathological processes, including angiogenesis. It has been reported that miR-503 reduces angiogenesis in tumorigenesis. However, to our knowledge, the precise role of miR-503 in the regulation of EPCs remains unclear. In the current study, we found that the expression of miR-503 was decreased in mouse bone marrow derived EPCs under the hypoxic condition. Importantly, upregulation of miR-503 suppressed the proliferation, migration and capillary-like tube formation of EPCs induced by hypoxia. Furthermore, a dual luciferase reporter assay showed that Apelin, an endogenous ligand of the G protein-coupled receptor APJ, was a direct target of miR-503 and overexpression of miR-503 significantly inhibited the protein level of Apelin in EPCs. Moreover, hypoxia treatment enhanced the expression of Apelin in EPCs. Meanwhile ectopic expression of Apelin promoted cellular proliferation, migration and tube formation of EPCs in vitro. In summary, our results indicate that miR-503 regulates proliferation, migration and angiogenesis of EPCs by targeting Apelin.
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Affiliation(s)
- Ya Wen
- Department of Neurology, Second Hospital of Hebei Medical University, Shijiazhuang 050000 Hebei, PR China; Laboratory of Neurology of Hebei Province, Shijiazhuang 050000 Hebei, PR China
| | - Rong Chen
- Department of Neurology, Second Hospital of Hebei Medical University, Shijiazhuang 050000 Hebei, PR China; Laboratory of Neurology of Hebei Province, Shijiazhuang 050000 Hebei, PR China
| | - Chunhua Zhu
- Department of Neurology, Second Hospital of Hebei Medical University, Shijiazhuang 050000 Hebei, PR China; Laboratory of Neurology of Hebei Province, Shijiazhuang 050000 Hebei, PR China
| | - Huimin Qiao
- Department of Neurology, Second Hospital of Hebei Medical University, Shijiazhuang 050000 Hebei, PR China; Laboratory of Neurology of Hebei Province, Shijiazhuang 050000 Hebei, PR China
| | - Ying Liu
- Department of Neurology, Second Hospital of Hebei Medical University, Shijiazhuang 050000 Hebei, PR China; Laboratory of Neurology of Hebei Province, Shijiazhuang 050000 Hebei, PR China
| | - Hui Ji
- Department of Neurology, Second Hospital of Hebei Medical University, Shijiazhuang 050000 Hebei, PR China; Laboratory of Neurology of Hebei Province, Shijiazhuang 050000 Hebei, PR China
| | - Jiangyong Miao
- Department of Neurology, Second Hospital of Hebei Medical University, Shijiazhuang 050000 Hebei, PR China; Laboratory of Neurology of Hebei Province, Shijiazhuang 050000 Hebei, PR China
| | - Linyu Chen
- Department of Neurology, Second Hospital of Hebei Medical University, Shijiazhuang 050000 Hebei, PR China; Laboratory of Neurology of Hebei Province, Shijiazhuang 050000 Hebei, PR China
| | - Xiaoxia Liu
- Department of Neurology, Second Hospital of Hebei Medical University, Shijiazhuang 050000 Hebei, PR China; Laboratory of Neurology of Hebei Province, Shijiazhuang 050000 Hebei, PR China
| | - Yi Yang
- Department of Neurology, Second Hospital of Hebei Medical University, Shijiazhuang 050000 Hebei, PR China; Laboratory of Neurology of Hebei Province, Shijiazhuang 050000 Hebei, PR China.
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Zhang Y, Zhu Y, Zhao E, He X, Zhao L, Wang Z, Fu X, Qi Y, Ma B, Song Y, Gao Q. Autologous cytokine-induced killer cell immunotherapy may improve overall survival in advanced malignant melanoma patients. Immunotherapy 2018; 9:1165-1174. [PMID: 29067881 DOI: 10.2217/imt-2017-0061] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
AIMS Our study was conducted to explore the efficacy of autologous cytokine-induced killer (CIK) cells in patients with advanced malignant melanoma. Materials & Methods: Here we reviewed 113 stage IV malignant melanoma patients among which 68 patients received CIK cell immunotherapy alone, while 45 patients accepted CIK cell therapy combined with chemotherapy. Results: We found that the median survival time in CIK cell group was longer than the combined therapy group (21 vs 15 months, p = 0.07). In addition, serum hemoglobin level as well as monocyte proportion and lymphocyte count were associated with patients' survival time. CONCLUSIONS These indicated that CIK cell immunotherapy might extend survival time in advanced malignant melanoma patients. Furthermore, serum hemoglobin level, monocyte proportion and lymphocyte count could be prognostic indicators for melanoma.
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Affiliation(s)
- Yong Zhang
- Department of Immunotherapy, Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, 127 Dong Ming Road, Zhengzhou 450003, China
| | - Yu'nan Zhu
- Department of Hematology, the 3rd People's Hospital of Zhengzhou, Zhengzhou, China
| | - Erjiang Zhao
- Department of Biostatistics Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, China
| | - Xiaolei He
- Department of Respiration, Shangqiu First People's Hospital, Zhengzhou, China
| | - Lingdi Zhao
- Department of Immunotherapy, Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, 127 Dong Ming Road, Zhengzhou 450003, China
| | - Zibing Wang
- Department of Immunotherapy, Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, 127 Dong Ming Road, Zhengzhou 450003, China
| | - Xiaomin Fu
- Department of Immunotherapy, Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, 127 Dong Ming Road, Zhengzhou 450003, China
| | - Yalong Qi
- Department of Immunotherapy, Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, 127 Dong Ming Road, Zhengzhou 450003, China
| | - Baozhen Ma
- Department of Immunotherapy, Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, 127 Dong Ming Road, Zhengzhou 450003, China
| | - Yongping Song
- Department of Hematology, Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, 127 Dong Ming Road, Zhengzhou 450003, China
| | - Quanli Gao
- Department of Immunotherapy, Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, 127 Dong Ming Road, Zhengzhou 450003, China
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20
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Cifuentes-Rius A, Butler LM, Voelcker NH. Precision nanomedicines for prostate cancer. Nanomedicine (Lond) 2018; 13:803-807. [DOI: 10.2217/nnm-2018-0034] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Affiliation(s)
- Anna Cifuentes-Rius
- Drug Delivery, Disposition & Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville Campus, 381 Royal Parade, Parkville VIC 3052, Australia
- Melbourne Centre for Nanofabrication, Victorian Node of the Australian National Fabrication Facility, 151 Wellington Road, Clayton, VIC 3168, Australia
| | - Lisa M Butler
- Adelaide Medical School & Freemasons Foundation Centre for Men's Health, University of Adelaide, Adelaide SA 5005, Australia
- South Australian Health & Medical Research Institute, Adelaide SA 5001, Australia
| | - Nicolas H Voelcker
- Drug Delivery, Disposition & Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville Campus, 381 Royal Parade, Parkville VIC 3052, Australia
- Melbourne Centre for Nanofabrication, Victorian Node of the Australian National Fabrication Facility, 151 Wellington Road, Clayton, VIC 3168, Australia
- South Australian Health & Medical Research Institute, Adelaide SA 5001, Australia
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21
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Vilalta M, Hughes NP, Von Eyben R, Giaccia AJ, Graves EE. Patterns of Vasculature in Mouse Models of Lung Cancer Are Dependent on Location. Mol Imaging Biol 2017; 19:215-224. [PMID: 27709411 DOI: 10.1007/s11307-016-1010-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
PURPOSE Preclinical studies of hypoxia are generally done using ectopic xenograft tumors, which behave differently from human tumors. Our previous findings have shown that subcutaneously implanted lung tumors exhibit more hypoxia than their orthotopic implanted or spontaneous K-ras-induced counterparts. We hypothesize that differences in hypoxia are due to site-specific differences in vascularity and perfusion. PROCEDURES To compare the presence and functionality of vessels in these tumor models, we studied vascular perfusion in vivo in real time. RESULTS Orthotopically implanted and spontaneous K-ras-induced lung tumors showed elevated perfusion, demonstrating vasculature functionality. Little contrast agent uptake was observed within the subcutaneously implanted tumors, indicating vascular dysfunction. These findings were corroborated at the microscopic level with Hoechst 33342 and Meca-32 staining. CONCLUSIONS From these observations, we concluded that differences in hypoxia in experimental models is related to vessel perfusion. Thus, appropriate selection of preclinical lung tumor models is essential for the study of hypoxia, angiogenesis and therapies targeting these phenomena.
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Affiliation(s)
- Marta Vilalta
- Department of Radiation Oncology, Molecular Imaging Program at Stanford and Bio-X Program, Stanford University, Stanford, CA, USA
| | - Nicholas P Hughes
- Department of Radiation Oncology, Molecular Imaging Program at Stanford and Bio-X Program, Stanford University, Stanford, CA, USA
| | - Rie Von Eyben
- Department of Radiation Oncology, Molecular Imaging Program at Stanford and Bio-X Program, Stanford University, Stanford, CA, USA
| | - Amato J Giaccia
- Department of Radiation Oncology, Molecular Imaging Program at Stanford and Bio-X Program, Stanford University, Stanford, CA, USA
| | - Edward E Graves
- Department of Radiation Oncology, Molecular Imaging Program at Stanford and Bio-X Program, Stanford University, Stanford, CA, USA.
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22
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Krishnaswamy VR, Balaguru UM, Chatterjee S, Korrapati PS. Dermatopontin augments angiogenesis and modulates the expression of transforming growth factor beta 1 and integrin alpha 3 beta 1 in endothelial cells. Eur J Cell Biol 2017; 96:266-275. [DOI: 10.1016/j.ejcb.2017.02.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2016] [Revised: 02/28/2017] [Accepted: 02/28/2017] [Indexed: 02/01/2023] Open
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23
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Zhang Y, Ren YJ, Guo LC, Ji C, Hu J, Zhang HH, Xu QH, Zhu WD, Ming ZJ, Yuan YS, Ren X, Song J, Yang JM. Nucleus accumbens-associated protein-1 promotes glycolysis and survival of hypoxic tumor cells via the HDAC4-HIF-1α axis. Oncogene 2017; 36:4171-4181. [PMID: 28319066 PMCID: PMC5537617 DOI: 10.1038/onc.2017.51] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 01/25/2017] [Accepted: 01/27/2017] [Indexed: 12/25/2022]
Abstract
Nucleus accumbens-associated protein-1 (NAC1), a nuclear factor of the BTB/POZ gene family, has emerging roles in cancer. In this study, we identified the NAC1-HDAC4-HIF-1α axis as an important pathway in regulating glycolysis and hypoxic adaptation in tumor cells. We show that nuclear NAC1 binds to histone deacetylase type 4 (HDAC4), hindering phosphorylation of HDAC4 at Ser246 and preventing its nuclear export that leads to cytoplasmic degradation of the deacetylase. Accumulation of HDAC4 in the nuclei results in an attenuation of HIF-1α acetylation, enhancing the stabilization and transcriptional activity of HIF-1α and strengthening adaptive response of cells to hypoxia. We also show the role of NAC1 in promoting glycolysis in a mouse xenograft model, and demonstrate that knockdown of NAC1 expression can reinforce the antitumor efficacy of bevacizumab, an inhibitor of angiogenesis. Clinical implication of the NAC1-HDAC4-HIF-1α pathway is suggested by the results showing that expression levels of these proteins are significantly correlative in human tumor specimens and associated with the disease progression. This study not only reveals an important function of NAC1 in regulating glycolysis, but also identifies the NAC1-HDAC4-HIF-1α axis as a novel molecular pathway that promotes survival of hypoxic tumor cells.
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Affiliation(s)
- Y Zhang
- Department of Pharmacology, College of Pharmaceutical Sciences, First Affiliated Hospital, Soochow University, Jiangsu, China
| | - Y-J Ren
- Department of Pharmacology, College of Pharmaceutical Sciences, First Affiliated Hospital, Soochow University, Jiangsu, China
| | - L-C Guo
- Department of Pharmacology, College of Pharmaceutical Sciences, First Affiliated Hospital, Soochow University, Jiangsu, China
| | - C Ji
- Department of Pharmacology, College of Pharmaceutical Sciences, First Affiliated Hospital, Soochow University, Jiangsu, China
| | - J Hu
- Department of Pharmacology, College of Pharmaceutical Sciences, First Affiliated Hospital, Soochow University, Jiangsu, China
| | - H-H Zhang
- Department of Pharmacology, College of Pharmaceutical Sciences, First Affiliated Hospital, Soochow University, Jiangsu, China
| | - Q-H Xu
- Department of Pharmacology, College of Pharmaceutical Sciences, First Affiliated Hospital, Soochow University, Jiangsu, China
| | - W-D Zhu
- Department of Pharmacology, College of Pharmaceutical Sciences, First Affiliated Hospital, Soochow University, Jiangsu, China
| | - Z-J Ming
- Department of Pharmacology, College of Pharmaceutical Sciences, First Affiliated Hospital, Soochow University, Jiangsu, China
| | - Y-S Yuan
- Engineering Research Center of Cell and Therapeutic Antibody, School of Pharmacy, Shanghai Jiao Tong University, Shanghai, China
| | - X Ren
- Department of Pharmacology and Microbiology and Immunology, The Penn State Hershey Cancer Institute, The Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - J Song
- Department of Pharmacology and Microbiology and Immunology, The Penn State Hershey Cancer Institute, The Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - J-M Yang
- Department of Pharmacology and Microbiology and Immunology, The Penn State Hershey Cancer Institute, The Pennsylvania State University College of Medicine, Hershey, PA, USA
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Wang Z, Zhang K, Zhu Y, Wang D, Shao Y, Zhang J. Curcumin inhibits hypoxia-induced proliferation and invasion of MG-63 osteosarcoma cells via downregulating Notch1. Mol Med Rep 2017; 15:1747-1752. [PMID: 28138706 DOI: 10.3892/mmr.2017.6159] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Accepted: 11/11/2016] [Indexed: 11/05/2022] Open
Abstract
Curcumin is a biologically active ingredient abundantly present in the ground rhizomes of Curcuma longa with a wide range of bioactive properties, including antitumor effects. Hypoxia is a common characteristic of solid tumors, including osteosarcoma. However, whether curcumin has antitumor effects on osteosarcoma under hypoxic conditions, and its underlying molecular mechanisms, remain unclear. The present study demonstrated that the MG‑63 osteosarcoma cell line exhibited increased proliferation and enhanced invasiveness upon exposure to hypoxic conditions. However, these effects were prevented by curcumin treatment. Further investigation revealed that curcumin may inhibit Notch1 upregulation induced by hypoxia. Overexpression of Notch1 via Notch1 cDNA transfection ameliorated curcumin‑inhibited MG‑63 cell growth under hypoxic conditions. Taken together, these data revealed that curcumin may suppress the growth of osteosarcoma cells in hypoxia via inhibiting Notch1 signaling.
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Affiliation(s)
- Zhan Wang
- Department of Orthopaedics, Hong Hui Hospital, Xi'an Jiaotong University School of Medicine, Xi'an, Shaanxi 710054, P.R. China
| | - Kun Zhang
- Department of Orthopaedics, Hong Hui Hospital, Xi'an Jiaotong University School of Medicine, Xi'an, Shaanxi 710054, P.R. China
| | - Yangjun Zhu
- Department of Orthopaedics, Hong Hui Hospital, Xi'an Jiaotong University School of Medicine, Xi'an, Shaanxi 710054, P.R. China
| | - Dengfeng Wang
- Department of Orthopaedics, Hong Hui Hospital, Xi'an Jiaotong University School of Medicine, Xi'an, Shaanxi 710054, P.R. China
| | - Yuxiong Shao
- Department of Orthopaedics, Hong Hui Hospital, Xi'an Jiaotong University School of Medicine, Xi'an, Shaanxi 710054, P.R. China
| | - Jun Zhang
- Department of Orthopaedics, Hong Hui Hospital, Xi'an Jiaotong University School of Medicine, Xi'an, Shaanxi 710054, P.R. China
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25
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Muz B, de la Puente P, Azab F, Azab AK. The role of hypoxia in cancer progression, angiogenesis, metastasis, and resistance to therapy. HYPOXIA (AUCKLAND, N.Z.) 2016. [PMID: 27774485 DOI: 10.2147/hp.s93413.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Hypoxia is a non-physiological level of oxygen tension, a phenomenon common in a majority of malignant tumors. Tumor-hypoxia leads to advanced but dysfunctional vascularization and acquisition of epithelial-to-mesenchymal transition phenotype resulting in cell mobility and metastasis. Hypoxia alters cancer cell metabolism and contributes to therapy resistance by inducing cell quiescence. Hypoxia stimulates a complex cell signaling network in cancer cells, including the HIF, PI3K, MAPK, and NFĸB pathways, which interact with each other causing positive and negative feedback loops and enhancing or diminishing hypoxic effects. This review provides background knowledge on the role of tumor hypoxia and the role of the HIF cell signaling involved in tumor blood vessel formation, metastasis, and development of the resistance to therapy. Better understanding of the role of hypoxia in cancer progression will open new windows for the discovery of new therapeutics targeting hypoxic tumor cells and hypoxic microenvironment.
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Affiliation(s)
- Barbara Muz
- Department of Radiation Oncology, Cancer Biology Division, Washington University School of Medicine in St Louis, MO, USA
| | - Pilar de la Puente
- Department of Radiation Oncology, Cancer Biology Division, Washington University School of Medicine in St Louis, MO, USA
| | - Feda Azab
- Department of Radiation Oncology, Cancer Biology Division, Washington University School of Medicine in St Louis, MO, USA
| | - Abdel Kareem Azab
- Department of Radiation Oncology, Cancer Biology Division, Washington University School of Medicine in St Louis, MO, USA
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26
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Elshaer SL, Lorys RE, El-Remessy AB. Cell Therapy and Critical Limb Ischemia: Evidence and Window of Opportunity in Obesity. ACTA ACUST UNITED AC 2016; 3. [PMID: 28979948 DOI: 10.15226/2374-8354/3/1/00121] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Sally L Elshaer
- Clinical and Experimental Therapeutics, College of Pharmacy, University of Georgia, Augusta, Georgia 30912, USA
| | - Renee E Lorys
- Clinical and Experimental Therapeutics, College of Pharmacy, University of Georgia, Augusta, Georgia 30912, USA
| | - A B El-Remessy
- Clinical and Experimental Therapeutics, College of Pharmacy, University of Georgia, Augusta, Georgia 30912, USA
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27
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Target hepatic artery regional chemotherapy and bevacizumab perfusion in liver metastatic colorectal cancer after failure of first-line or second-line systemic chemotherapy. Anticancer Drugs 2016; 27:118-26. [PMID: 26566233 DOI: 10.1097/cad.0000000000000290] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Colorectal cancer liver metastasis (CRLM) is a refractory disease after failure of first-line or second-line chemotherapy. Bevacizumab is recommended as first-line therapy for advanced colorectal cancer, but is unproven in CRLM through the hepatic artery. We report favorable outcomes with targeted vessel regional chemotherapy (TVRC) for liver metastatic gastric cancer. TVRC with FOLFOX and bevacizumab perfusion through the hepatic artery was attempted for CRLM for efficacy and safety evaluation. In a single-institution retrospective observational study, 246 patients with CRLM after at least first-line or second-line failure of systemic chemotherapy received TVRC with FOLFOX (i.e. oxaliplatin, leucovorin, and 5-fluorouracil). Of 246 patients, 63 were enrolled into two groups: group 1 (n=30) received bevacizumab and TVRC following tumor progression during previous TVRC treatments; group 2 (n=33) received TVRC plus bevacizumab for CRLM on initiating TVRC. There were no significant differences in the median survival time (14.7 vs. 13.2 months, P=0.367), although the median time to progression was significant (3.3 vs. 5.5 months, P=0.026) between groups. No severe adverse events related to TVRC plus bevacizumab perfusion occurred. Target vessel regional chemotherapy with FOLFOX plus bevacizumab perfusion through the hepatic artery was effective and safe in CRLM. The optimal combination of TVRC and bevacizumab needs further confirmation in future phase II-III clinical trials.
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28
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Helman AM, Murphy MP. Vascular cognitive impairment: Modeling a critical neurologic disease in vitro and in vivo. Biochim Biophys Acta Mol Basis Dis 2015; 1862:975-82. [PMID: 26704178 DOI: 10.1016/j.bbadis.2015.12.009] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Revised: 12/04/2015] [Accepted: 12/07/2015] [Indexed: 01/23/2023]
Abstract
BACKGROUND Vascular contributions to cognitive impairment and dementia (VCID) is a complex form of dementia, combining aspects of vascular disease and other forms of dementia, such as Alzheimer's disease. VCID encompasses a wide spectrum of cerebrovascular-driven cognitive impairment, from mild cognitive impairment to fully developed dementia. This disease state is further complicated by metabolic disorders, such as type 2 diabetes and hypertension, and lifestyle factors, like obesity and high fat diets. SCOPE OF REVIEW This manuscript is meant to both define VCID and review the in vitro and in vivo models of the disease state. This includes in vitro models of the neurovascular unit, models of chronic cerebral hypoperfusion, animals with NOTCH3 mutations as a model of small vessel disease, large animals with cerebral amyloid angiopathy (CAA), and animal models of mixed dementia. MAJOR CONCLUSIONS Synthetic microvessels are a promising technique to study the neurovascular unit and canines, despite the cost, are an excellent model to study CAA. While there are several good models of individual aspects of VCID, the heterogeneity of the disease states prevents them from being a model of all aspects of the disease. Therefore, VCID needs to be further defined into disease states that exist within this umbrella term. This includes specific guidelines for stroke counts and stroke locations and further categorization of overlapping cerebrovascular and AD pathologies that contribute to dementia. This will allow for better models and a more thorough understanding of how vascular disease contributes to dementia. GENERAL SIGNIFICANCE VCID is the second most common form of dementia and is expected to increase in coming years. The heterogeneity of VCID makes it difficult to study, but without better definitions and models, VCID presents a major public health problem for our aging population. This article is part of a Special Issue entitled: Vascular Contributions to Cognitive Impairment and Dementia, edited by M. Paul Murphy, Roderick A. Corriveau and Donna M. Wilcock.
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Affiliation(s)
- Alex M Helman
- Department of Molecular and Cellular Biochemistry, University of Kentucky, 800 South Limestone, Lexington, KY 40536, USA; Sanders-Brown Center on Aging, University of Kentucky, 800 South Limestone, Lexington, KY 40536, USA
| | - M Paul Murphy
- Department of Molecular and Cellular Biochemistry, University of Kentucky, 800 South Limestone, Lexington, KY 40536, USA; Sanders-Brown Center on Aging, University of Kentucky, 800 South Limestone, Lexington, KY 40536, USA.
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29
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Muz B, de la Puente P, Azab F, Azab AK. The role of hypoxia in cancer progression, angiogenesis, metastasis, and resistance to therapy. HYPOXIA 2015; 3:83-92. [PMID: 27774485 PMCID: PMC5045092 DOI: 10.2147/hp.s93413] [Citation(s) in RCA: 1179] [Impact Index Per Article: 131.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Hypoxia is a non-physiological level of oxygen tension, a phenomenon common in a majority of malignant tumors. Tumor-hypoxia leads to advanced but dysfunctional vascularization and acquisition of epithelial-to-mesenchymal transition phenotype resulting in cell mobility and metastasis. Hypoxia alters cancer cell metabolism and contributes to therapy resistance by inducing cell quiescence. Hypoxia stimulates a complex cell signaling network in cancer cells, including the HIF, PI3K, MAPK, and NFĸB pathways, which interact with each other causing positive and negative feedback loops and enhancing or diminishing hypoxic effects. This review provides background knowledge on the role of tumor hypoxia and the role of the HIF cell signaling involved in tumor blood vessel formation, metastasis, and development of the resistance to therapy. Better understanding of the role of hypoxia in cancer progression will open new windows for the discovery of new therapeutics targeting hypoxic tumor cells and hypoxic microenvironment.
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Affiliation(s)
- Barbara Muz
- Department of Radiation Oncology, Cancer Biology Division, Washington University School of Medicine in St Louis, MO, USA
| | - Pilar de la Puente
- Department of Radiation Oncology, Cancer Biology Division, Washington University School of Medicine in St Louis, MO, USA
| | - Feda Azab
- Department of Radiation Oncology, Cancer Biology Division, Washington University School of Medicine in St Louis, MO, USA
| | - Abdel Kareem Azab
- Department of Radiation Oncology, Cancer Biology Division, Washington University School of Medicine in St Louis, MO, USA
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30
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Shiozawa T, Iyama S, Toshima S, Sakata A, Usui S, Minami Y, Sato Y, Hizawa N, Noguchi M. Dimethylarginine dimethylaminohydrolase 2 promotes tumor angiogenesis in lung adenocarcinoma. Virchows Arch 2015; 468:179-90. [PMID: 26515557 PMCID: PMC4778151 DOI: 10.1007/s00428-015-1863-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Revised: 08/28/2015] [Accepted: 09/29/2015] [Indexed: 12/22/2022]
Abstract
Although embryonal proteins have been used as tumor marker, most are not useful for detection of early malignancy. In the present study, we developed mouse monoclonal antibodies against fetal lung of miniature swine, and screened them to find an embryonal protein that is produced at the early stage of malignancy, focusing on lung adenocarcinoma. We found an antibody clone that specifically stained stroma of lung adenocarcinoma. LC-MS/MS identified the protein recognized by this clone as dimethylarginine dimethylaminohydrolase 2 (DDAH2), an enzyme known for antiatherosclerotic activity. DDAH2 was found to be expressed in fibroblasts of stroma of malignancies, with higher expression in minimally invasive adenocarcinoma (MIA) and invasive adenocarcinoma than in adenocarcinoma in situ (AIS). Moreover, tumors with high stromal expression of DDAH2 had a poorer prognosis than those without. In vitro analysis showed that DDAH2 increases expression of endothelial nitric oxide synthase (eNOS), inducing proliferation and capillary-like tube formation of vascular endothelial cells. In resected human tissues, eNOS also showed higher expression in invasive adenocarcinoma than in AIS and normal lung, similarly to DDAH2. Our data indicate that expression of DDAH2 is associated with invasiveness of lung adenocarcinoma via tumor angiogenesis. DDAH2 expression might be a prognostic factor in lung adenocarcinoma.
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Affiliation(s)
- Toshihiro Shiozawa
- Department of Pathology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan.,Department of Pulmonary Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Shinji Iyama
- Department of Pathology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Shotaro Toshima
- Department of Pathology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Akiko Sakata
- Department of Pathology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Shingo Usui
- Department of Thoracic Surgery, NHO Ibarakihigashi National Hospital, Tokai, Ibaraki, Japan
| | - Yuko Minami
- Department of Pathology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Yukio Sato
- Department of Thoracic Surgery, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Nobuyuki Hizawa
- Department of Pulmonary Medicine, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Masayuki Noguchi
- Department of Pathology, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan.
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31
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Clanton R, Saucier D, Ford J, Akabani G. Microbial influences on hormesis, oncogenesis, and therapy: A review of the literature. ENVIRONMENTAL RESEARCH 2015; 142:239-256. [PMID: 26183884 DOI: 10.1016/j.envres.2015.06.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Revised: 06/11/2015] [Accepted: 06/23/2015] [Indexed: 06/04/2023]
Abstract
Utilization of environmental stimuli for growth is the main factor contributing to the evolution of prokaryotes and eukaryotes, independently and mutualistically. Epigenetics describes an organism's ability to vary expression of certain genes based on their environmental stimuli. The diverse degree of dose-dependent responses based on their variances in expressed genetic profiles makes it difficult to ascertain whether hormesis or oncogenesis has or is occurring. In the medical field this is shown where survival curves used in determining radiotherapeutic doses have substantial uncertainties, some as large as 50% (Barendsen, 1990). Many in-vitro radiobiological studies have been limited by not taking into consideration the innate presence of microbes in biological systems, which have either grown symbiotically or pathogenically. Present in-vitro studies neglect to take into consideration the varied responses that commensal and opportunistic pathogens will have when exposed to the same stimuli and how such responses could act as stimuli for their macro/microenvironment. As a result many theories such as radiation carcinogenesis explain microscopic events but fail to describe macroscopic events (Cohen, 1995). As such, this review shows how microorganisms have the ability to perturb risks of cancer and enhance hormesis after irradiation. It will also look at bacterial significance in the microenvironment of the tumor before and during treatment. In addition, bacterial systemic communication after irradiation and the host's immune responses to infection could explain many of the phenomena associated with bystander effects. Therefore, the present literature review considers the paradigms of hormesis and oncogenesis in order to find a rationale that ties them all together. This relationship was thus characterized to be the microbiome.
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Affiliation(s)
- Ryan Clanton
- Department of Nuclear Engineering, Texas A&M University, College Station, TX 77843, USA; Texas A&M Institute for Preclinical Studies, Texas A&M University, College Station, TX 77843, USA
| | - David Saucier
- Department of Nuclear Engineering, Texas A&M University, College Station, TX 77843, USA
| | - John Ford
- Department of Nuclear Engineering, Texas A&M University, College Station, TX 77843, USA
| | - Gamal Akabani
- Department of Nuclear Engineering, Texas A&M University, College Station, TX 77843, USA; Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, TX 77843, USA; Texas A&M Institute for Preclinical Studies, Texas A&M University, College Station, TX 77843, USA
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Cumsille P, Coronel A, Conca C, Quiñinao C, Escudero C. Proposal of a hybrid approach for tumor progression and tumor-induced angiogenesis. Theor Biol Med Model 2015; 12:13. [PMID: 26133367 PMCID: PMC4509478 DOI: 10.1186/s12976-015-0009-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Accepted: 06/12/2015] [Indexed: 11/26/2022] Open
Abstract
One of the main challenges in cancer modelling is to improve the knowledge of tumor progression in areas related to tumor growth, tumor-induced angiogenesis and targeted therapies efficacy. For this purpose, incorporate the expertise from applied mathematicians, biologists and physicians is highly desirable. Despite the existence of a very wide range of models, involving many stages in cancer progression, few models have been proposed to take into account all relevant processes in tumor progression, in particular the effect of systemic treatments and angiogenesis. Composite biological experiments, both in vitro and in vivo, in addition with mathematical modelling can provide a better understanding of theses aspects. In this work we proposed that a rational experimental design associated with mathematical modelling could provide new insights into cancer progression. To accomplish this task, we reviewed mathematical models and cancer biology literature, describing in detail the basic principles of mathematical modelling. We also analyze how experimental data regarding tumor cells proliferation and angiogenesis in vitro may fit with mathematical modelling in order to reconstruct in vivo tumor evolution. Additionally, we explained the mathematical methodology in a comprehensible way in order to facilitate its future use by the scientific community.
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Affiliation(s)
- Patricio Cumsille
- Department of Basic Sciences, Faculty of Sciences, Universidad del Bío-Bío, Campus Fernando May, Av. Andrés Bello s/n, Casilla 447 Chillán, Chile.
- Centre for Biotechnology and Bioengineering, University of Chile, Beaucheff 851, Santiago, Chile.
- Group of Applied Mathematics (GMA), Chillán, Chile.
- Group of Investigation in Tumor Angiogenesis (GIANT), Chillán, Chile.
| | - Aníbal Coronel
- Department of Basic Sciences, Faculty of Sciences, Universidad del Bío-Bío, Campus Fernando May, Av. Andrés Bello s/n, Casilla 447 Chillán, Chile.
- Group of Applied Mathematics (GMA), Chillán, Chile.
| | - Carlos Conca
- Centre for Biotechnology and Bioengineering, University of Chile, Beaucheff 851, Santiago, Chile.
- Department of Mathematical Engineering (DIM) and Center for Mathematical Modelling (CMM), University of Chile, (UMI CNRS 2807), Beaucheff 851, Correo 3 Santiago, P.O. Box 170-3, Chile.
| | - Cristóbal Quiñinao
- Laboratoire Jacques-Louis Lions, Université Pierre et Marie Curie and Mathematical Neuroscience Team, CIRB, Collège de France, (UMR CNRS 7598), 4 place de Jussieu, Paris, F-75005, France.
| | - Carlos Escudero
- Department of Basic Sciences, Faculty of Sciences, Universidad del Bío-Bío, Campus Fernando May, Av. Andrés Bello s/n, Casilla 447 Chillán, Chile.
- Group of Investigation in Tumor Angiogenesis (GIANT), Chillán, Chile.
- Group of Research and Innovation in Vascular Health (GRIVAS Health), Chillán, Chile.
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Yang H, Lee JW, Noh JK, Kim HC, Park CJ, Park JW, Hwang IJ, Kim SY, Lee JH. Expression of Vimentin Intermediate Filament for Vascular Development in Olive Flounder (Paralichthys olivaceus). Dev Reprod 2015; 18:107-15. [PMID: 25949178 PMCID: PMC4282252 DOI: 10.12717/dr.2014.18.2.107] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Revised: 05/14/2014] [Accepted: 05/20/2014] [Indexed: 01/11/2023]
Abstract
Cardiovascular system is the primary organ to develop and reach a functional state, which underscores the essential role of the vasculature in the developing embryo. The vasculature is a highly specialized organ that functions in a number of key physiological works including the carrying of oxygen and nutrients to tissues. It is closely involved in the formation of heart, and hence it is essential for survival during the hatching period. The expression of genes involved during vascular development in the olive flounder (Paralichthys olivaceus) in the days after hatching is not fully understood. Therefore, we examined the expression patterns of genes activated during the development of flounder. Microscopic observations showed that formation of blood vessels is related to the expression of the vimentin gene. Also, the temporal expression patterns of this vimentin-like gene in the developmental stages and in the normal tissues of olive flounder. The purpose of this study was to examine the expression patterns of vimentin in normal tissues of the olive flounder and during the development of the vascular system in newly hatched olive flounders and HIF-1 plays a vital role in the formation of blood vessels during development. Vimentin expression was strong at the beginning of the development of blood vessels, and was present throughout all developmental stages. Our findings have important implications with respect to the roles of vimentin and HIF-1 in the development and evolution of the first blood vessels in olive flounder. Further studies are required to elucidate the vimentin-mediated hypoxic response signal transduction and to decipher the functional role of vimentin in developmental stages.
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Affiliation(s)
- Hyun Yang
- Genetics and Breeding Research Center, NFRDI, Geoje 656-842, Republic of Korea
| | - Jang-Wook Lee
- Genetics and Breeding Research Center, NFRDI, Geoje 656-842, Republic of Korea
| | - Jae Koo Noh
- Genetics and Breeding Research Center, NFRDI, Geoje 656-842, Republic of Korea
| | - Hyun Chul Kim
- Genetics and Breeding Research Center, NFRDI, Geoje 656-842, Republic of Korea
| | - Choul-Ji Park
- Genetics and Breeding Research Center, NFRDI, Geoje 656-842, Republic of Korea
| | - Jong-Won Park
- Genetics and Breeding Research Center, NFRDI, Geoje 656-842, Republic of Korea
| | - In Joon Hwang
- Genetics and Breeding Research Center, NFRDI, Geoje 656-842, Republic of Korea
| | - Sung Yeon Kim
- Genetics and Breeding Research Center, NFRDI, Geoje 656-842, Republic of Korea
| | - Jeong-Ho Lee
- Genetics and Breeding Research Center, NFRDI, Geoje 656-842, Republic of Korea
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34
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Cooke JP, Losordo DW. Modulating the vascular response to limb ischemia: angiogenic and cell therapies. Circ Res 2015; 116:1561-78. [PMID: 25908729 PMCID: PMC4869986 DOI: 10.1161/circresaha.115.303565] [Citation(s) in RCA: 158] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Accepted: 03/31/2015] [Indexed: 12/29/2022]
Abstract
The age-adjusted prevalence of peripheral arterial disease in the US population has been estimated to approach 12%. The clinical consequences of occlusive peripheral arterial disease include pain on walking (claudication), pain at rest, and loss of tissue integrity in the distal limbs; the latter may ultimately lead to amputation of a portion of the lower extremity. Surgical bypass techniques and percutaneous catheter-based interventions may successfully reperfuse the limbs of certain patients with peripheral arterial disease. In many patients, however, the anatomic extent and distribution of arterial occlusion is too severe to permit relief of pain and healing of ischemic ulcers. No effective medical therapy is available for the treatment of such patients, for many of whom amputation represents the only hope for alleviation of symptoms. The ultimate failure of medical treatment and procedural revascularization in significant numbers of patients has led to attempts to develop alternative therapies for ischemic disease. These strategies include administration of angiogenic cytokines, either as recombinant protein or as gene therapy, and more recently, to investigations of stem/progenitor cell therapy. The purpose of this review is to provide an outline of the preclinical basis for angiogenic and stem cell therapies, review the clinical research that has been done, summarize the lessons learned, identify gaps in knowledge, and suggest a course toward successfully addressing an unmet medical need in a large and growing patient population.
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Affiliation(s)
- John P Cooke
- From the Department of Cardiovascular Sciences, Houston Methodist Research Institute, TX (J.P.C.); and NeoStem Inc, New York, NY (D.W.L.).
| | - Douglas W Losordo
- From the Department of Cardiovascular Sciences, Houston Methodist Research Institute, TX (J.P.C.); and NeoStem Inc, New York, NY (D.W.L.).
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Fletcher JW, Logan TF, Eitel JA, Mathias CJ, Ng Y, Lacy JL, Hutchins GD, Green MA. Whole-body PET/CT evaluation of tumor perfusion using generator-based 62Cu-ethylglyoxal bis(thiosemicarbazonato)copper(II): validation by direct comparison to 15O-water in metastatic renal cell carcinoma. J Nucl Med 2014; 56:56-62. [PMID: 25525184 DOI: 10.2967/jnumed.114.148106] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
UNLABELLED This study was undertaken to demonstrate the feasibility of whole-body (62)Cu-ethylglyoxal bis(thiosemicarbazonato)copper(II) ((62)Cu-ETS) PET/CT tumor perfusion imaging in patients with metastatic renal carcinoma and to validate (62)Cu-ETS as a quantitative marker of tumor perfusion by direct comparison with (15)O-water perfusion imaging. METHODS PET/CT imaging of 10 subjects with stage IV renal cell cancer was performed after intravenous administration of (15)O-water (10-min dynamic list-mode study) with the heart and at least 1 tumor in the PET field of view, followed 10 min later by intravenous (62)Cu-ETS (6-min list-mode study). Whole-body (62)Cu imaging was then performed from 6 to 20 min at 2-3 min/bed position. Blood flow (K1) was quantified with both agents for normal and malignant tissues in the 21.7-cm dynamic field of view. The required arterial input functions were derived from the left atrium and, in the case of (62)Cu-ETS, corrected for partial decomposition of the agent by blood with data from an in vitro analysis using a sample of each patient's blood. This imaging protocol was repeated at an interval of 3-4 wk after initiation of a standard clinical treatment course of the antiangiogenic agent sunitinib. RESULTS All subjects received the scheduled (62)Cu-ETS doses for the dynamic and subsequent whole-body PET/CT scans, but technical issues resulted in no baseline (15)O-water data for 2 subjects. Direct comparisons of the perfusion estimates for normal tissues and tumor metastases were made in 18 paired baseline and treatment studies (10 subjects; 8 baseline studies, 10 repeated studies during treatment). There was an excellent correlation between the blood flow estimates made with (62)Cu-ETS and (15)O-water for normal tissues (muscle, thyroid, myocardium) and malignant lesions (pulmonary nodules, bone lesions); the regression line was y = 0.85x + 0.15, R(2) = 0.83, for the 88 regions analyzed. CONCLUSION (62)Cu-ETS provided high-quality whole-body PET/CT images, and (62)Cu-ETS measures of blood flow were highly and linearly correlated with (15)O-water-derived K1 values (mL(-1) ⋅ min(-1) ⋅ g). This tracer is suitable for use as a PET tracer of tumor perfusion in patients with metastatic renal cell carcinoma.
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Affiliation(s)
- James W Fletcher
- Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, Indiana
| | - Theodore F Logan
- The Melvin and Bren Simon Cancer Center, Indiana University School of Medicine, Indianapolis, Indiana; and
| | - Jacob A Eitel
- Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, Indiana
| | - Carla J Mathias
- Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, Indiana
| | - Yen Ng
- Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, Indiana
| | | | - Gary D Hutchins
- Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, Indiana
| | - Mark A Green
- Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, Indiana
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Qu X, Zhang T, Ma H, Sui P, Du J. Lower mean corpuscular hemoglobin concentration is associated with unfavorable prognosis of resected lung cancer. Future Oncol 2014; 10:2149-59. [PMID: 25471030 DOI: 10.2217/fon.14.121] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
ABSTRACT Background: The association of preoperative red blood cell indexes in non-anemic patients undergoing lung resections for non-small-cell lung cancer with recurrence-free survival (RFS) and overall survival (OS) has never been investigated. Methods: We retrospectively examined the impact of preoperative red blood cell indexes on RFS and OS and the relationships between the indexes and clinicopathological factors in lung cancer. Results: A total of 649 patients were evaluated. The mean corpuscular hemoglobin concentration was showed as an independent prognostic factor in all patients for OS (hazard ratio [HR]: 0.697; 95% CI: 0.502–0.969; p = 0.032) and RFS (HR: 0.688; 95% CI: 0.519–0.914; p = 0.010). The mean corpuscular volume was an independent prognostic factor in all patients for OS (HR: 0.589; 95% CI: 0.380–0.912; p = 0.018), but not for RFS (HR: 0.684; 95% CI: 0.461–1.015; p = 0.059). Conclusion: In conclusion, the results of this study suggest that mean corpuscular hemoglobin concentration is an independent prognostic factor for OS and RFS in non-small-cell lung cancer.
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Affiliation(s)
- Xiao Qu
- Institute of Oncology, Shandong Provincial Hospital Affiliated to Shandong University, Shandong University, 324 Jingwu Road, Jinan, 250021, PR China
| | - Tiehong Zhang
- Institute of Oncology, Shandong Provincial Hospital Affiliated to Shandong University, Shandong University, 324 Jingwu Road, Jinan, 250021, PR China
| | - Honghai Ma
- Institute of Oncology, Shandong Provincial Hospital Affiliated to Shandong University, Shandong University, 324 Jingwu Road, Jinan, 250021, PR China
| | - Ping Sui
- Institute of Oncology, Shandong Provincial Hospital Affiliated to Shandong University, Shandong University, 324 Jingwu Road, Jinan, 250021, PR China
| | - Jiajun Du
- Institute of Oncology, Shandong Provincial Hospital Affiliated to Shandong University, Shandong University, 324 Jingwu Road, Jinan, 250021, PR China
- Department of Thoracic Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Shandong University, 324 Jingwu Road, Jinan, 250021, PR China
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Jiang X, Guo X, Xu X, Teng M, Huang C, Zhang D, Zhang Q, Zhang J, Huang Y. Hypoxia regulates CD9-mediated keratinocyte migration via the P38/MAPK pathway. Sci Rep 2014; 4:6304. [PMID: 25200404 PMCID: PMC4158574 DOI: 10.1038/srep06304] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Accepted: 08/15/2014] [Indexed: 12/12/2022] Open
Abstract
Keratinocyte migration is an early event in the wound healing process. Although we previously found that CD9 downregulation is required for the keratinocyte migration during wound repair, the mechanism of how CD9 expression is regulated remains unclear. Here, we observed the effect of hypoxia (2% O2) on CD9 expression and keratinocyte migration. CD9 expression was downregulated and keratinocyte migration was increased under hypoxic conditions. In addition, CD9 overexpression reversed hypoxia-induced cell migration. We also found that hypoxia activated the p38/MAPK pathway. SB203580, a p38/MAPK inhibitor, increased CD9 expression and inhibited keratinocyte migration under hypoxia, while MKK6 (Glu) overexpression decreased CD9 expression and promoted hypoxic keratinocyte migration. Our results demonstrate that hypoxia regulates CD9 expression and CD9-mediated keratinocyte migration via the p38/MAPK pathway.
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Affiliation(s)
- Xupin Jiang
- Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Southwest Hospital, The Third Military Medical University, Chongqing, China
| | - Xiaowei Guo
- Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Southwest Hospital, The Third Military Medical University, Chongqing, China
| | - Xue Xu
- The No. 324 Hospital of PLA, Chongqing, China
| | - Miao Teng
- Department of Burn and Plastic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Chong Huang
- Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Southwest Hospital, The Third Military Medical University, Chongqing, China
| | - Dongxia Zhang
- Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Southwest Hospital, The Third Military Medical University, Chongqing, China
| | - Qiong Zhang
- Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Southwest Hospital, The Third Military Medical University, Chongqing, China
| | - Jiaping Zhang
- Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Southwest Hospital, The Third Military Medical University, Chongqing, China
| | - Yuesheng Huang
- Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Southwest Hospital, The Third Military Medical University, Chongqing, China
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Chou CH, Sinden JD, Couraud PO, Modo M. In vitro modeling of the neurovascular environment by coculturing adult human brain endothelial cells with human neural stem cells. PLoS One 2014; 9:e106346. [PMID: 25187991 PMCID: PMC4154686 DOI: 10.1371/journal.pone.0106346] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Accepted: 08/01/2014] [Indexed: 11/18/2022] Open
Abstract
Brain and vascular cells form a functionally integrated signalling network that is known as the neurovascular unit (NVU). The signalling (autocrine, paracrine and juxtacrine) between different elements of this unit, especially in humans, is difficult to disentangle in vivo. Developing representative in vitro models is therefore essential to better understand the cellular interactions that govern the neurovascular environment. We here describe a novel approach to assay these cellular interactions by combining a human adult cerebral microvascular endothelial cell line (hCMEC/D3) with a fetal ganglionic eminence-derived neural stem cell (hNSC) line. These cell lines provide abundant homogeneous populations of cells to produce a consistently reproducible in vitro model of endothelial morphogenesis and the ensuing NVU. Vasculature-like structures (VLS) interspersed with patches of differentiating neural cells only occurred when hNSCs were seeded onto a differentiated endothelium. These VLS emerged within 3 days of coculture and by day 6 were stabilizing. After 7 days of coculture, neuronal differentiation of hNSCs was increased 3-fold, but had no significant effect on astrocyte or oligodendrocyte differentiation. ZO1, a marker of adherens and tight junctions, was highly expressed in both undifferentiated and differentiated endothelial cells, but the adherens junction markers CD31 and VE-cadherin were significantly reduced in coculture by approximately 20%. A basement membrane, consisting of laminin, vitronectin, and collagen I and IV, separated the VLS from neural patches. This simple assay can assist in elucidating the cellular and molecular signaling involved in the formation of VLS, as well as the enhancement of neuronal differentiation through endothelial signaling.
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Affiliation(s)
- Chung-Hsing Chou
- University of Pittsburgh, McGowan Institute for Regenerative Medicine, Pittsburgh, Pennsylvania, United States of America
- Kings College London, Institute of Psychiatry, Department of Neuroscience, London, United Kingdom
- Tri-service General Hospital, Department of Neurology, National Defense Medical Centre, Taipei, Taiwan
| | | | - Pierre-Olivier Couraud
- INSERM U1016, Institut Cochin, Paris, France
- CNRS, UMR8104, Paris, France
- Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Michel Modo
- University of Pittsburgh, McGowan Institute for Regenerative Medicine, Pittsburgh, Pennsylvania, United States of America
- University of Pittsburgh, Department of Radiology, Pittsburgh, Pennsylvania, United States of America
- University of Pittsburgh, Department of Bioengineering, Pittsburgh, Pennsylvania, United States of America
- * E-mail:
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To combine or not combine: the role of radiotherapy and targeted agents in the treatment for renal cell carcinoma. World J Urol 2013; 32:59-67. [DOI: 10.1007/s00345-013-1068-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2012] [Accepted: 03/26/2013] [Indexed: 12/23/2022] Open
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Pacheco-Torres J, López-Larrubia P, Ballesteros P, Cerdán S. Imaging tumor hypoxia by magnetic resonance methods. NMR IN BIOMEDICINE 2011; 24:1-16. [PMID: 21259366 DOI: 10.1002/nbm.1558] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2009] [Revised: 03/21/2010] [Accepted: 04/01/2010] [Indexed: 05/10/2023]
Abstract
Tumor hypoxia results from the negative balance between the oxygen demands of the tissue and the capacity of the neovasculature to deliver sufficient oxygen. The resulting oxygen deficit has important consequences with regard to the aggressiveness and malignancy of tumors, as well as their resistance to therapy, endowing the imaging of hypoxia with vital repercussions in tumor prognosis and therapy design. The molecular and cellular events underlying hypoxia are mediated mainly through hypoxia-inducible factor, a transcription factor with pleiotropic effects over a variety of cellular processes, including oncologic transformation, invasion and metastasis. However, few methodologies have been able to monitor noninvasively the oxygen tensions in vivo. MRI and MRS are often used for this purpose. Most MRI approaches are based on the effects of the local oxygen tension on: (i) the relaxation times of (19)F or (1)H indicators, such as perfluorocarbons or their (1)H analogs; (ii) the hemodynamics and magnetic susceptibility effects of oxy- and deoxyhemoglobin; and (iii) the effects of paramagnetic oxygen on the relaxation times of tissue water. (19)F MRS approaches monitor tumor hypoxia through the selective accumulation of reduced nitroimidazole derivatives in hypoxic zones, whereas electron spin resonance methods determine the oxygen level through its influence on the linewidths of appropriate paramagnetic probes in vivo. Finally, Overhauser-enhanced MRI combines the sensitivity of EPR methodology with the resolution of MRI, providing a window into the future use of hyperpolarized oxygen probes.
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Affiliation(s)
- Jesús Pacheco-Torres
- Laboratory for Imaging and Spectroscopy by Magnetic Resonance LISMAR, Institute of Biomedical Research Alberto Sols, CSIC/UAM, c/Arturo Duperier 4, Madrid, Spain
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How do tumors actively escape from host immunosurveillance? Arch Immunol Ther Exp (Warsz) 2010; 58:435-48. [PMID: 20922572 DOI: 10.1007/s00005-010-0102-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2010] [Accepted: 05/28/2010] [Indexed: 12/12/2022]
Abstract
The immunological background for the process of tumor growth is still obscure. However, our understanding of what happens could have important consequences, namely in the context of cancer immunotherapy. A tumor is able to grow in the host environment either because it is recognizable as normal tissue and tolerated by host immune cells, or because it can "escape" from host immunosurveillance. According to the second option the mechanisms of tumor recognition and consequent destruction are actively disturbed by such processes as: change of tumor immunogenicity, production of tumor-derived regulatory molecules, and interaction of cancer cells with tumor-infiltrating immune cells. The results of studies devoted to the problem of immunoregulation in the tumor environment seem to support the "escape" hypothesis.
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Horsman MR. Angiogenesis and vascular targeting: Relevance for hyperthermia. Int J Hyperthermia 2009; 24:57-65. [DOI: 10.1080/02656730701829710] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Jackson IL, Batinic-Haberle I, Sonveaux P, Dewhirst MW, Vujaskovic Z. ROS production and angiogenic regulation by macrophages in response to heat therapy. Int J Hyperthermia 2009; 22:263-73. [PMID: 16754348 DOI: 10.1080/02656730600594027] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
PURPOSE It has been well established that inadequate blood supply combined with high metabolic rates of oxygen consumption results in areas of low oxygen tension (<1%) within malignant tumours and that elevating tumour temperatures above 39 degrees Celsius results in significant improvement in tumour oxygenation. Macrophages play a dual role in tumour initiation and progression having both pro-tumour and anti-tumour effects. However, the response of macrophages to heat within a hypoxic environment has not yet been clearly defined. METHODS Raw 264.7 murine macrophages were incubated under normoxia and chronic hypoxia at temperatures ranging from 37-43 degrees Celsius. Under normoxia at 41 degrees Celsius, macrophages start to release significant levels of superoxide. The combination of heat with hypoxia constitutes an additional stimulus leading to increased respiratory burst of macrophages. RESULTS The high levels of superoxide were found to be associated with changes in macrophage production of pro-angiogenic cytokines. While hypoxia alone (37 degrees Celsius) increased levels of hypoxia inducible factor-1alpha (HIF-1alpha) in macrophages, the combination of hypoxia and mild hyperthermia (39-41 degrees Celsius) induced a strong reduction in HIF-1alpha expression. The HIF-regulated vascular endothelial growth factor (VEGF) decreased simultaneously, revealing that heat inhibits both HIF-1alpha stabilization and transcriptional activity. CONCLUSION The data suggest that temperatures which are readily achievable in the clinic (39-41 degrees Celsius) might be optimal for maximizing hyperthermic response. At higher temperatures, these effects are reversed, thereby limiting the therapeutic benefits of more severe hyperthermic exposure.
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Affiliation(s)
- I L Jackson
- Department of Radiation Oncology, Duke University Medical Center, Durham, NC 27710, USA
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Bley CR, Jochum W, Orlowski K, Furmanova P, Vuong V, McSheehy PM, Pruschy M. Role of the Microenvironment for Radiosensitization by Patupilone. Clin Cancer Res 2009; 15:1335-42. [DOI: 10.1158/1078-0432.ccr-08-0969] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kim E, Bowsher J, Thomas AS, Sakhalkar H, Dewhirst M, Oldham M. Improving the quantitative accuracy of optical-emission computed tomography by incorporating an attenuation correction: application to HIF1 imaging. Phys Med Biol 2008; 53:5371-83. [PMID: 18765891 DOI: 10.1088/0031-9155/53/19/007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Optical computed tomography (optical-CT) and optical-emission computed tomography (optical-ECT) are new techniques for imaging the 3D structure and function (including gene expression) of whole unsectioned tissue samples. This work presents a method of improving the quantitative accuracy of optical-ECT by correcting for the 'self'-attenuation of photons emitted within the sample. The correction is analogous to a method commonly applied in single-photon-emission computed tomography reconstruction. The performance of the correction method was investigated by application to a transparent cylindrical gelatin phantom, containing a known distribution of attenuation (a central ink-doped gelatine core) and a known distribution of fluorescing fibres. Attenuation corrected and uncorrected optical-ECT images were reconstructed on the phantom to enable an evaluation of the effectiveness of the correction. Significant attenuation artefacts were observed in the uncorrected images where the central fibre appeared approximately 24% less intense due to greater attenuation from the surrounding ink-doped gelatin. This artefact was almost completely removed in the attenuation-corrected image, where the central fibre was within approximately 4% of the others. The successful phantom test enabled application of attenuation correction to optical-ECT images of an unsectioned human breast xenograft tumour grown subcutaneously on the hind leg of a nude mouse. This tumour cell line had been genetically labelled (pre-implantation) with fluorescent reporter genes such that all viable tumour cells expressed constitutive red fluorescent protein and hypoxia-inducible factor 1 transcription-produced green fluorescent protein. In addition to the fluorescent reporter labelling of gene expression, the tumour microvasculature was labelled by a light-absorbing vasculature contrast agent delivered in vivo by tail-vein injection. Optical-CT transmission images yielded high-resolution 3D images of the absorbing contrast agent, and revealed highly inhomogeneous vasculature perfusion within the tumour. Optical-ECT emission images yielded high-resolution 3D images of the fluorescent protein distribution in the tumour. Attenuation-uncorrected optical-ECT images showed clear loss of signal in regions of high attenuation, including regions of high perfusion, where attenuation is increased by increased vascular ink stain. Application of attenuation correction showed significant changes in an apparent expression of fluorescent proteins, confirming the importance of the attenuation correction. In conclusion, this work presents the first development and application of an attenuation correction for optical-ECT imaging. The results suggest that successful attenuation correction for optical-ECT is feasible and is essential for quantitatively accurate optical-ECT imaging.
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Affiliation(s)
- E Kim
- Department of Radiation Oncology, Duke University Medical Center, Durham, NC, USA
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Prudovsky I, Tarantini F, Landriscina M, Neivandt D, Soldi R, Kirov A, Small D, Kathir KM, Rajalingam D, Kumar TKS. Secretion without Golgi. J Cell Biochem 2008; 103:1327-43. [PMID: 17786931 PMCID: PMC2613191 DOI: 10.1002/jcb.21513] [Citation(s) in RCA: 100] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A growing number of proteins devoid of signal peptides have been demonstrated to be released through the non-classical pathways independent of endoplasmic reticulum and Golgi. Among them are two potent proangiogenic cytokines FGF1 and IL1alpha. Stress-induced transmembrane translocation of these proteins requires the assembly of copper-dependent multiprotein release complexes. It involves the interaction of exported proteins with the acidic phospholipids of the inner leaflet of the cell membrane and membrane destabilization. Not only stress, but also thrombin treatment and inhibition of Notch signaling stimulate the export of FGF1. Non-classical release of FGF1 and IL1alpha presents a promising target for treatment of cardiovascular, oncologic, and inflammatory disorders.
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Affiliation(s)
- Igor Prudovsky
- Maine Medical Center Research Institute, Maine Medical Center, Scarborough, Maine 04074, USA.
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Uto Y, Nagasawa H, Jin CZ, Nakayama S, Tanaka A, Kiyoi S, Nakashima H, Shimamura M, Inayama S, Fujiwara T, Takeuchi Y, Uehara Y, Kirk KL, Nakata E, Hori H. Design of antiangiogenic hypoxic cell radiosensitizers: 2-nitroimidazoles containing a 2-aminomethylene-4-cyclopentene-1,3-dione moiety. Bioorg Med Chem 2008; 16:6042-53. [PMID: 18474428 PMCID: PMC3113482 DOI: 10.1016/j.bmc.2008.04.041] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2008] [Revised: 04/17/2008] [Accepted: 04/19/2008] [Indexed: 11/15/2022]
Abstract
We designed chiral 2-nitroimidazole derivatives containing a 2-aminomethylene-4-cyclopentene-1,3-dione moiety as antiangiogenic hypoxic cell radiosensitizers. Based on results of molecular orbital calculations, the 2-aminomethylene-4-cyclopentene-1,3-dione moiety is expected to show high electrophilicity comparable to that of the 2-methylene-4-cyclopentene-1,3-dione moiety included in TX-1123 and tyrphostin AG17. We evaluated the antiangiogenic and radiosensitizing effects of the new compounds, along with other biological properties including their activities as hypoxic cytotoxicities and protein tyrosine kinase (PTK) inhibitory activities. Among the compounds tested, 5 (TX-2036) proved to be the strongest antiangiogenic hypoxic cell radiosensitizer. All the other chiral 2-nitroimidazole derivatives having 2-aminomethylene-4-cyclopentene-1,3-dione moiety tested were also antiangiogenic hypoxic cell radiosensitizers. The PTK inhibitory activity of 5 (TX-2036) showed this to be a promising and potent EGFR kinase inhibitor, having an IC(50) value of lower than 2microM. This compound also was an Flt-1 kinase inhibitor having an IC(50) value of lower than 20microM. Our results show that these chiral 2-nitroimidazole derivatives that contain the 2-aminomethylene-4-cyclopentene-1,3-dione moiety as a potent antiangiogenic pharmacophoric descriptor are promising lead candidates for the development of antiangiogenic hypoxic cell radiosensitizers.
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Affiliation(s)
- Yoshihiro Uto
- Department of Life System, Institute of Technology and Science, Graduate School, The University of Tokushima, Tokushima 770-8506, Japan
| | - Hideko Nagasawa
- Department of Life System, Institute of Technology and Science, Graduate School, The University of Tokushima, Tokushima 770-8506, Japan
- Laboratory of Pharmaceutical Chemistry, Gifu Pharmaceutical University, Mitahorahigashi-5, Gifu 502-8585, Japan
| | - Cheng-Zhe Jin
- Department of Life System, Institute of Technology and Science, Graduate School, The University of Tokushima, Tokushima 770-8506, Japan
| | - Shinichi Nakayama
- Department of Life System, Institute of Technology and Science, Graduate School, The University of Tokushima, Tokushima 770-8506, Japan
| | - Ayako Tanaka
- Department of Life System, Institute of Technology and Science, Graduate School, The University of Tokushima, Tokushima 770-8506, Japan
| | - Saori Kiyoi
- Department of Life System, Institute of Technology and Science, Graduate School, The University of Tokushima, Tokushima 770-8506, Japan
| | - Hitomi Nakashima
- Department of Life System, Institute of Technology and Science, Graduate School, The University of Tokushima, Tokushima 770-8506, Japan
| | - Mariko Shimamura
- Medical Research and Development Center, The Tokyo Metropolitan Institute of Medical Science,3-18-22 Honkomagome, Bunkyo-ku, Tokyo 113-8613, Japan
| | - Seiichi Inayama
- Institute of Oriental Medical Sciences,2-6-3 Ebisunishi, Shibuya-ku, Tokyo 155-0021, Japan
| | - Tomoya Fujiwara
- Graduate School of Medicine and Pharmaceutrical Sciences for Research, University of Toyama, Sugitani 2630, Toyama 930-0194, Japan
| | - Yoshio Takeuchi
- Graduate School of Medicine and Pharmaceutrical Sciences for Research, University of Toyama, Sugitani 2630, Toyama 930-0194, Japan
| | - Yoshimasa Uehara
- Department of Bioactive Molecules, National Institutes of Health, 1-23-1, Shinjuku-ku, Tokyo 162-8640, Japan
| | - Kenneth L. Kirk
- Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, DHHS, Bethesda, MD 20892, USA
| | - Eiji Nakata
- Department of Life System, Institute of Technology and Science, Graduate School, The University of Tokushima, Tokushima 770-8506, Japan
| | - Hitoshi Hori
- Department of Life System, Institute of Technology and Science, Graduate School, The University of Tokushima, Tokushima 770-8506, Japan
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Kalliomäki TM, McCallum G, Lunt SJ, Wells PG, Hill RP. Analysis of the effects of exposure to acute hypoxia on oxidative lesions and tumour progression in a transgenic mouse breast cancer model. BMC Cancer 2008; 8:151. [PMID: 18507854 PMCID: PMC2427038 DOI: 10.1186/1471-2407-8-151] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2007] [Accepted: 05/28/2008] [Indexed: 12/21/2022] Open
Abstract
Background Tumour hypoxia is known to be a poor prognostic indicator, predictive of increased risk of metastatic disease and reduced survival. Genomic instability has been proposed as one of the potential mechanisms for hypoxic tumour progression. Both of these features are commonly found in many cancer types, but their relationship and association with tumour progression has not been examined in the same model. Methods To address this issue, we determined the effects of 6 week in vivo acute hypoxic exposure on the levels of mutagenic lipid peroxidation product, malondialdehyde, and 8-oxo-7,8-dihydro-2'-deoxyguanosine DNA (8-oxo-dG) lesions in the transgenic polyomavirus middle T (PyMT) breast cancer mouse model. Results We observed significantly increased plasma lipid peroxidation and 8-oxo-dG lesion levels in the hypoxia-exposed mice. Consumption of malondialdehyde also induced a significant increase in the PyMT tumour DNA lesion levels, however, these increases did not translate into enhanced tumour progression. We further showed that the in vivo exposure to acute hypoxia induced accumulation of F4/80 positive tumour-associated macrophages (TAMs), demonstrating a relationship between hypoxia and macrophages in an experimental model. Conclusion These data suggest that although exposure to acute hypoxia causes an increase in 8-oxo-dG lesions and TAMs in the PyMT tumours, these increases do not translate into significant changes in tumour progression at the primary or metastatic levels in this strong viral oncogene-driven breast cancer model.
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Affiliation(s)
- Tuula M Kalliomäki
- Applied Molecular Oncology Division, Ontario Cancer Institute/Princess Margaret Hospital, Canada.
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Konecky SD, Choe R, Corlu A, Lee K, Wiener R, Srinivas SM, Saffer JR, Freifelder R, Karp JS, Hajjioui N, Azar F, Yodh AG. Comparison of diffuse optical tomography of human breast with whole-body and breast-only positron emission tomography. Med Phys 2008; 35:446-55. [PMID: 18383664 DOI: 10.1118/1.2826560] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
We acquire and compare three-dimensional tomographic breast images of three females with suspicious masses using diffuse optical tomography (DOT) and positron emission tomography (PET). Co-registration of DOT and PET images was facilitated by a mutual information maximization algorithm. We also compared DOT and whole-body PET images of 14 patients with breast abnormalities. Positive correlations were found between total hemoglobin concentration and tissue scattering measured by DOT, and fluorodeoxyglucose (18F-FDG) uptake. In light of these observations, we suggest potential benefits of combining both PET and DOT for characterization of breast lesions.
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Affiliation(s)
- Soren D Konecky
- Department of Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, Philadelphia, Pennsylvania 19104, USA.
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Oldham M, Sakhalkar H, Oliver T, Allan Johnson G, Dewhirst M. Optical clearing of unsectioned specimens for three-dimensional imaging via optical transmission and emission tomography. JOURNAL OF BIOMEDICAL OPTICS 2008; 13:021113. [PMID: 18465962 PMCID: PMC2746042 DOI: 10.1117/1.2907968] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Optical computed tomography (optical-CT) and optical emission computed tomography (optical-ECT) are new techniques that enable unprecedented high-resolution 3-D multimodal imaging of tissue structure and function. Applications include imaging macroscopic gene expression and microvasculature structure in unsectioned biological specimens up to 8 cm(3). A key requisite for these imaging techniques is effective sample preparation including optical clearing, which enables light transport through the sample while preserving the signal (either light absorbing stain or fluorescent proteins) in representative form. We review recent developments in optical-CT and optical-ECT, and compatible "fluorescence-friendly" optical clearing protocols.
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Affiliation(s)
- Mark Oldham
- Duke University Medical Center, Department of Radiation Oncology, Durham, North Carolina 27710, USA.
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