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Davis JS, Chavez JC, Kok M, Miguel YS, Lee HY, Henderson H, Overman MJ, Morris VK, Kee B, Fogelman D, Advani SM, Johnson B, Parseghian C, Shen JP, Dasari A, Shaw KR, Vilar E, Raghav KP, Shureiqi I, Wolff RA, Meric-Bernstam F, Maru D, Menter DG, Kopetz S, Chang S. Abstract A023: Influence of pre-diagnosis obesity and post-diagnosis aspirin use on survival from stage IV colorectal cancer. Cancer Res 2022. [DOI: 10.1158/1538-7445.crc22-a023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
Abstract
Background: The relationship between obesity and colorectal cancer (CRC) outcome is poorly understood in late-stage patients. Increased body mass may negate aspirin use for cancer prevention, but the influence of body mass index (BMI) on post-diagnosis aspirin use is unclear. This study aims to evaluate impacts of pre-diagnosis BMI and post-diagnosis aspirin use on overall survival in late-stage CRC patients on the Assessment of Targeted Therapies Against Colorectal Cancer (ATTACC) clinical protocol. Methods: Patients with metastatic or treatment refractory disease were consented on the ATTACC protocol at MD Anderson Cancer Center and invited to complete a survey on risk factors relevant to CRC etiology. Using survey data, BMI was calculated from the decade prior to initial CRC diagnosis for 656 patients. Survival was measured from stage IV diagnosis until death or last follow-up. Cox Proportional Hazards models were constructed to estimate associations of pre-diagnosis obesity and post-diagnosis aspirin use with overall survival. Results: Controlling for age, sex, race, stage at initial diagnosis, and weight change between pre-diagnosis and survey date, patients with pre-diagnosis obesity had significantly higher likelihood of death (HR 1.45, 95% CI: 1.11, 1.91) compared to those with normal pre-diagnosis BMI. Further, only patients with normal weight pre-diagnosis experienced a survival benefit with post-diagnosis aspirin use (HR 0.59, 95% CI: 0.39, 0.90). Conclusions: Our findings suggest potentially differential tumor development resulting from the long-term physiologic host environment, here obesity. Confirmation and further evaluation are needed to determine whether pre-diagnosis BMI may predict benefit from post-diagnosis aspirin use.
Citation Format: Jennifer S. Davis, Janelle C. Chavez, Melissa Kok, Yazmin San Miguel, Hwa Young Lee, Henry Henderson, Michael J. Overman, Van Karlyle Morris, Bryan Kee, David Fogelman, Shailesh M. Advani, Benny Johnson, Christine Parseghian, John Paul Shen, Arvind Dasari, Kenna R. Shaw, Eduardo Vilar, Kanwal P. Raghav, Imad Shureiqi, Robert A. Wolff, Funda Meric-Bernstam, Dipen Maru, David G. Menter, Scott Kopetz, Shine Chang. Influence of pre-diagnosis obesity and post-diagnosis aspirin use on survival from stage IV colorectal cancer [abstract]. In: Proceedings of the AACR Special Conference on Colorectal Cancer; 2022 Oct 1-4; Portland, OR. Philadelphia (PA): AACR; Cancer Res 2022;82(23 Suppl_1):Abstract nr A023.
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Affiliation(s)
| | | | - Melissa Kok
- 2The University of Texas MD Anderson Cancer Center, Houston, TX
| | | | - Hwa Young Lee
- 2The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Henry Henderson
- 2The University of Texas MD Anderson Cancer Center, Houston, TX
| | | | | | - Bryan Kee
- 2The University of Texas MD Anderson Cancer Center, Houston, TX
| | - David Fogelman
- 2The University of Texas MD Anderson Cancer Center, Houston, TX
| | | | - Benny Johnson
- 2The University of Texas MD Anderson Cancer Center, Houston, TX
| | | | - John Paul Shen
- 2The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Arvind Dasari
- 2The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Kenna R. Shaw
- 2The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Eduardo Vilar
- 2The University of Texas MD Anderson Cancer Center, Houston, TX
| | | | - Imad Shureiqi
- 2The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Robert A. Wolff
- 2The University of Texas MD Anderson Cancer Center, Houston, TX
| | | | - Dipen Maru
- 2The University of Texas MD Anderson Cancer Center, Houston, TX
| | - David G. Menter
- 2The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Scott Kopetz
- 2The University of Texas MD Anderson Cancer Center, Houston, TX
| | - Shine Chang
- 2The University of Texas MD Anderson Cancer Center, Houston, TX
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2
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Davis JS, Chavez JC, Kok M, San Miguel Y, Lee HY, Henderson H, Overman MJ, Morris V, Kee B, Fogelman D, Advani SM, Johnson B, Parseghian C, Shen JP, Dasari A, Shaw KR, Vilar E, Raghav KP, Shureiqi I, Wolff RA, Meric-Bernstam F, Maru D, Menter DG, Kopetz S, Chang S. Association of Prediagnosis Obesity and Postdiagnosis Aspirin With Survival From Stage IV Colorectal Cancer. JAMA Netw Open 2022; 5:e2236357. [PMID: 36239938 PMCID: PMC9568800 DOI: 10.1001/jamanetworkopen.2022.36357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
IMPORTANCE The potential relationship between obesity and colorectal cancer (CRC) outcome is poorly understood in patients with late-stage disease. Increased body mass index may negate aspirin use for cancer prevention, but its role as a factor on the effectiveness of postdiagnosis aspirin use is unclear. OBJECTIVE To evaluate how prediagnosis obesity and postdiagnosis aspirin use may be associated with overall survival in patients with late-stage colorectal cancer. DESIGN, SETTING, AND PARTICIPANTS This cross-sectional study used self-reported data from patients with metastatic or treatment-refractory disease who consented to a clinical protocol at MD Anderson Cancer Center, a large US cancer treatment center. Patients were enrolled between 2010 and 2018 and followed up for mortality through July 2020. Analyses were conducted through March 2022. EXPOSURES Body mass index in the decade prior to initial diagnosis and regular aspirin use at survey completion. MAIN OUTCOMES AND MEASURES Overall survival was measured from stage IV diagnosis until death or last follow-up. Cox proportional hazards models were constructed to estimate associations of prediagnosis obesity and postdiagnosis aspirin use with overall survival. RESULTS Of 656 patients included in this analysis, 280 (42.7%) were women, 135 (20.6%) were diagnosed with CRC before age 45 years, 414 (63.1%) were diagnosed between ages 45 and 65 years, and 107 (16.3%) were diagnosed at 65 years or older; 105 patients (16.0%) were Black or Hispanic, and 501 (76.4%) were non-Hispanic White. Controlling for age, sex, race, stage at initial diagnosis, and weight change between prediagnosis and survey date, patients with obesity in the decade prior to CRC diagnosis had significantly higher likelihood of death (hazard ratio, 1.45; 95% CI, 1.11-1.91) compared with those with normal prediagnosis body mass index. Furthermore, only patients with normal prediagnosis body mass index experienced significant survival benefit with postdiagnosis aspirin use (hazard ratio, 0.59; 95% CI, 0.39-0.90). CONCLUSIONS AND RELEVANCE In this cross-sectional study, our findings suggest potentially differential tumor development in the long-term physiologic host environment of obesity. Confirmation and further evaluation are needed to determine whether prediagnosis body mass index may be used to estimate the benefit from postdiagnosis aspirin use.
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Affiliation(s)
- Jennifer S. Davis
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston
- Now with Department of Cancer Biology, University of Kansas Medical Center, Kansas City
| | - Janelle C. Chavez
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston
- Department of Cancer Prevention Research Training Program, The University of Texas MD Anderson Cancer Center, Houston
- Now with Stanford University School of Medicine, Stanford, California
| | - Melissa Kok
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston
- Department of Cancer Prevention Research Training Program, The University of Texas MD Anderson Cancer Center, Houston
- Now with Baylor College of Medicine, Houston, Texas
| | - Yazmin San Miguel
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston
- Department of Cancer Prevention Research Training Program, The University of Texas MD Anderson Cancer Center, Houston
- Now with Abbott Laboratories, Chicago, Illinois
| | - Hwa Young Lee
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston
- Department of Cancer Prevention Research Training Program, The University of Texas MD Anderson Cancer Center, Houston
| | - Henry Henderson
- Department of Cancer Prevention Research Training Program, The University of Texas MD Anderson Cancer Center, Houston
- Department of Cancer Systems Imaging, The University of Texas MD Anderson Cancer Center, Houston
- Now with Foundation Medicine, Atlanta, Georgia
| | - Michael J. Overman
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston
| | - Van Morris
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston
| | - Bryan Kee
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston
| | - David Fogelman
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston
- Now with Merck & Co, Philadelphia, Pennsylvania
| | - Shailesh M. Advani
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston
- Now with Terasaki Institute of Biomedical Innovation, Los Angeles, California
| | - Benny Johnson
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston
| | - Christine Parseghian
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston
| | - John Paul Shen
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston
| | - Arvind Dasari
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston
| | - Kenna R. Shaw
- Department of Sheikh Khalifa Nahyan Ben Zayed Institute for Personalized Cancer Therapy, The University of Texas MD Anderson Cancer Center, Houston
| | - Eduardo Vilar
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston
- Department of Clinical Cancer Prevention, The University of Texas MD Anderson Cancer Center, Houston
| | - Kanwal P. Raghav
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston
| | - Imad Shureiqi
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston
- Now with Department of Cancer Biology, University of Michigan Medical School, Ann Arbor
| | - Robert A. Wolff
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston
| | - Funda Meric-Bernstam
- Department of Investigational Cancer Therapeutics, The University of Texas MD Anderson Cancer Center, Houston
| | - Dipen Maru
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston
| | - David G. Menter
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston
| | - Scott Kopetz
- Department of Gastrointestinal Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston
| | - Shine Chang
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston
- Department of Cancer Prevention Research Training Program, The University of Texas MD Anderson Cancer Center, Houston
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Kok MY, Chavez JC, Quesada PR, Adegoke OT, Chang S. Pathways and Barriers to Careers in Academic Clinical Cancer Prevention: a Qualitative Study. J Cancer Educ 2022; 37:1069-1075. [PMID: 33184755 PMCID: PMC7660128 DOI: 10.1007/s13187-020-01921-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/02/2020] [Indexed: 06/11/2023]
Abstract
National surveys document steady declines over time in interest in academic medicine and cancer prevention careers (Am J Prev Med 54(3):444-8, 2018). Through interviews with 16 academic cancer prevention physicians at one comprehensive cancer center, this study identifies motivations and barriers to physician careers in academic cancer prevention and proposes recommendations to increase recruitment. Participants reported that cancer prevention was vague to them early in training, impairing career exploration. Further, without role models and opportunities to learn about cancer prevention, many were ignorant of career options. Many had incorrect views about cancer prevention practice being mainly within the scope of primary care physicians, and some reported colleagues viewing the rigor of cancer prevention skeptically. However, all described notable experiences-in classes, with mentors, on research projects, or from encounters with patients, motivating them to pursue academic clinical cancer prevention regardless of challenges. Clearly, a lack of both information and guidance towards careers in clinical cancer prevention has been critical barriers to robust recruitment of physicians to the field and must be addressed urgently. Helping physicians earlier during training to both understand the value of prevention and cultivate their interests in it, particularly for clinical cancer prevention, would have widespread benefits.
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Affiliation(s)
| | | | - Pompeyo R Quesada
- Otolaryngology-Head and Neck Surgery, The University of Kansas Medical Center, Kansas City, KS, USA
| | - Oluwapelumi T Adegoke
- Department of Psychiatry and Behavioral Health, Virginia Tech Carilion School of Medicine, Roanoke, VA, USA
| | - Shine Chang
- Department of Epidemiology, Division of Cancer Prevention and Population Sciences, The University of Texas MD Anderson Cancer Center, Houston, TX, USA.
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Abstract
This study uses data from the American Trauma Society’s Trauma Information Exchange Program to evaluate trends in nationwide 60-minute access to American College of Surgeons Committee on Trauma–verified level I-IV trauma centers between 2013 and 2019.
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Affiliation(s)
- Jeff Choi
- Department of Surgery, Stanford University, Stanford, California
| | - Sarah Karr
- Department of Computer Science, Stanford University, Stanford, California
| | - Arjun Jain
- Department of Computer Science, Stanford University, Stanford, California
| | | | | | - David A. Spain
- Department of Surgery, Stanford University, Stanford, California
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Chavez JC, Wren SM, Knowlton LM. Disparities in Outcomes after Emergency Surgery in the Rio Grande Valley of Texas. J Am Coll Surg 2021. [DOI: 10.1016/j.jamcollsurg.2021.07.249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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6
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Kanhai K, Goulooze SC, Stevens J, Hay JL, Dent G, Verma A, Hankemeier T, de Boer T, Meijering H, Chavez JC, Cohen AF, Groeneveld GJ. Quantifying Beta-Galactosylceramide Kinetics in Cerebrospinal Fluid of Healthy Subjects Using Deuterium Labeling. Clin Transl Sci 2016; 9:321-327. [PMID: 27743499 PMCID: PMC5351000 DOI: 10.1111/cts.12424] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 09/08/2016] [Indexed: 12/12/2022] Open
Abstract
Therapeutics promoting myelin synthesis may enhance recovery in demyelinating diseases, such as multiple sclerosis. However, no suitable method exists to quantify myelination. The turnover of galactosylceramide (myelin component) is indicative of myelination in mice, but its turnover has not been determined in humans. Here, six healthy subjects consumed 120 mL 70% D2O daily for 70 days to label galactosylceramide. We then used mass spectrometry and compartmental modeling to quantify the turnover rate of galactosylceramide in cerebrospinal fluid. Maximum deuterium enrichment of body water ranged from 1.5–3.9%, whereas that of galactosylceramide was much lower: 0.05–0.14%. This suggests a slow turnover rate, which was confirmed by the model‐estimated galactosylceramide turnover rate of 0.00168 day−1, which corresponds to a half‐life of 413 days. Additional studies in patients with multiple sclerosis are needed to investigate whether galactosylceramide turnover could be used as an outcome measure in clinical trials with remyelination therapies.
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Affiliation(s)
- Kms Kanhai
- Centre for Human Drug Research, Leiden, The Netherlands
| | - S C Goulooze
- Centre for Human Drug Research, Leiden, The Netherlands
| | - J Stevens
- Centre for Human Drug Research, Leiden, The Netherlands
| | - J L Hay
- Centre for Human Drug Research, Leiden, The Netherlands
| | - G Dent
- Experimental Medicine, Biogen Cambridge, Massachusetts, USA
| | - A Verma
- Experimental Medicine, Biogen Cambridge, Massachusetts, USA
| | - T Hankemeier
- Netherlands Metabolomics Centre, Leiden, The Netherlands
| | - T de Boer
- Analytical Biochemical Laboratory BV, Assen, The Netherlands
| | - H Meijering
- Analytical Biochemical Laboratory BV, Assen, The Netherlands
| | - J C Chavez
- Experimental Medicine, Biogen Cambridge, Massachusetts, USA
| | - A F Cohen
- Centre for Human Drug Research, Leiden, The Netherlands
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Pozo Devoto VM, Giusti S, Chavez JC, de Plazas SF. Hypoxia-induced apoptotic cell death is prevented by oestradiol via oestrogen receptors in the developing central nervous system. J Neuroendocrinol 2008; 20:375-80. [PMID: 18208555 DOI: 10.1111/j.1365-2826.2008.01652.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
The neuroprotective effects of oestrogens have been demonstrated against a variety of insults, including excitotoxicity, oxidative stress and cerebral ischemia under certain conditions. However, the molecular mechanisms underlying oestrogen neuroprotection are still unclear. We aimed to determine whether 17beta-oestradiol (E(2)) administration post-hypoxia (p-hx) was neuroprotective and whether these actions were mediated through oestrogen receptors (ER). For this purpose, 12-embyonic day-old chickens were subjected to acute hypoxia [8% (O(2)), 60 min], followed by different reoxygenation periods. To test the neuroprotective effect of E(2) and its mechanism, embryos were injected 30 min after the end of hypoxia with E(2) alone or with ICI 182 780, a competitive antagonist of ER. Cytochrome c (cyt c) release, an indicator of mitochondrial apoptotic pathway, was measured by western blot in optic lobe cytosolic extracts. DNA fragmentation by TUNEL fluorescence and caspase-3 fragmentation by immunofluorescence were detected on optic lobe sections. Acute hypoxia produces a significant increase in cyt c release from mitochondria at 4 h p-hx, followed by an increase in TUNEL positive cells 2 h later (6 h p-hx). Administration of E(2) (0.5 mg/egg) produced a significant decrease in cytosolic cyt c levels at 4 h p-hx, in caspase-3 activation and in TUNEL positive cells at 6 h p-hx compared to vehicle treated embryos. In the E(2)-ICI 182 780 treated embryos, cyt c release, caspase-3 fragmentation and TUNEL positive cells were similar to the hypoxic embryos, thus suggesting the requirement of an E(2)-ER interaction for E(2) mediated neuroprotective effects. In conclusion, E(2) prevents hypoxia-induced cyt c release and posterior cell death and these effects are mediated by oestrogen receptors.
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Affiliation(s)
- V M Pozo Devoto
- Institute of Cell Biology and Neuroscience Prof. E. De Robertis, School of Medicine, University of Buenos Aires, Paraguay, Buenos Aires, Argentina
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Pozo Devoto VM, Chavez JC, Fiszer de Plazas S. Acute hypoxia and programmed cell death in developing CNS: Differential vulnerability of chick optic tectum layers. Neuroscience 2006; 142:645-53. [PMID: 16904833 DOI: 10.1016/j.neuroscience.2006.06.054] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2006] [Revised: 06/06/2006] [Accepted: 06/23/2006] [Indexed: 11/25/2022]
Abstract
The chick optic tectum displays an alternating pattern of cellular and plexiform layers and at embryonic day (ED) 12 there are mainly four cellular layers: transient cell compartment 3 (TCC3), compartment "h-i-j"(C"h-i-j"), stratum griseum centrale (SGC) and subventricular zone (SvZ). In the present work we characterized the programmed cell death (PCD) of these layers and their vulnerability to acute hypoxia at ED12, and also identified the main cellular type involved in hypoxic cell death. The colocalization of three independent markers of cell degeneration: pyknotic nuclei by Hoechst staining, fragmented DNA by TdT-mediated dUTP nick-end labeling (TUNEL), and presence of active caspase-3 by immunofluorescence, was analyzed in embryos that developed in normoxic conditions (control embryos) and embryos that were subjected to hypoxia (8% O(2)/92% N(2)) for 60 min (hypoxic embryos), followed by 0-12 h of normoxic recovery. In control embryos cell death rate within each layer was constant through time, but there were significant differences (P<0.01) in cell death rates among the different layers. In contrast, in hypoxic embryos, a significant increase (P<0.01) in cell death rate was observed in layers TCC3, C"h-i-j" and SGC. This change was evident only at 6 h post-hypoxia, and at later time points cell death rate was similar to control values. Each of these layers had a different vulnerability to the hypoxic event while the SvZ layer was not affected. In addition, the significant colocalization between the neuron specific nuclear protein (NeuN) and TUNEL signal showed that hypoxia affected primarily neurons. In conclusion, our findings demonstrate that in the chick optic tectum at ED12, PCD is layer dependent and that acute hypoxia causes a transient increase in neuronal death in a delayed fashion, which is also layer dependent. The morphological features of the neuronal death process at the light microscope level resembled apoptosis.
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Affiliation(s)
- V M Pozo Devoto
- Institute of Cell Biology and Neuroscience "Prof. E. De Robertis," School of Medicine, University of Buenos Aires, Paraguay 2155, 1121 Buenos Aires, Argentina
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Rodríguez-Montalvo C, Escobedo M, Muñoz L, Pérez E, Martínez A, Palacios D, Náñez H, Chavez JC, Rodríguez LC, Tijerina L, Esponda M. Liver transplantation experience in the north of Mexico. Transplant Proc 2002; 34:314. [PMID: 11959303 DOI: 10.1016/s0041-1345(01)02779-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- C Rodríguez-Montalvo
- Liver Trasplant Units, Hospital Universitario Dr. José E. González UANL, Hospital San José-TEC, Monterrey, Nuevo León, Mexico
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10
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Agani FH, Pichiule P, Chavez JC, LaManna JC. The role of mitochondria in the regulation of hypoxia-inducible factor 1 expression during hypoxia. J Biol Chem 2000; 275:35863-7. [PMID: 10961998 DOI: 10.1074/jbc.m005643200] [Citation(s) in RCA: 149] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Hypoxia-inducible factor 1 (HIF-1) is a heterodimeric transcription factor that regulates transcriptional activation of several genes responsive to the lack of oxygen, including erythropoietin, vascular endothelial growth factor, glycolytic enzymes, and glucose transporters. Because the involvement of mitochondria in the regulation of HIF-1 has been postulated, we tested the effects of mitochondrial electron transport chain deficiency on HIF-1 protein expression and DNA binding in hypoxic cells. The neurotoxin 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) inhibits electron transport chain at the level of complex I. MPTP is first converted to a pharmacologically active metabolite 1-methyl-4-phenylpyridinum (MPP+). MPP+ effectively inhibited both complex I activity and hypoxic accumulation of HIF-1alpha protein in dopaminergic cell lines PC12 and CATH.a. In C57BL/6 mice, a single dose of MPTP (15 mg/kg, intraperitoneal) inhibited complex I activity and HIF-1alpha protein accumulation in the striatum in response to a subsequent hypoxic challenge (8% O(2), 4 h). In a genetic model system, 40% complex I-inhibited human-ape xenomitochondrial cybrids, hypoxic induction of HIF-1alpha was severely reduced, and HIF-1 DNA binding was diminished. However, succinate, the mitochondrial complex II substrate, restored the hypoxic response in cybrid cells, suggesting that electron transport chain activity is required for activation of HIF-1. A partial complex I deficiency and a mild reduction in intact cell oxygen consumption effectively prevented hypoxic induction of HIF-1alpha protein.
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MESH Headings
- 1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine/pharmacology
- 1-Methyl-4-phenylpyridinium/pharmacology
- Animals
- Brain/drug effects
- Brain/metabolism
- DNA/genetics
- DNA/metabolism
- DNA, Mitochondrial/genetics
- DNA-Binding Proteins/antagonists & inhibitors
- DNA-Binding Proteins/genetics
- DNA-Binding Proteins/metabolism
- Disease Models, Animal
- Electron Transport/drug effects
- Electron Transport Complex I
- Gene Expression Regulation/drug effects
- Humans
- Hybrid Cells/drug effects
- Hybrid Cells/metabolism
- Hypoxia-Inducible Factor 1
- Hypoxia-Inducible Factor 1, alpha Subunit
- Mice
- Mice, Inbred C57BL
- Mitochondria/drug effects
- Mitochondria/genetics
- Mitochondria/metabolism
- NADH, NADPH Oxidoreductases/antagonists & inhibitors
- NADH, NADPH Oxidoreductases/deficiency
- NADH, NADPH Oxidoreductases/metabolism
- Neostriatum/drug effects
- Neostriatum/metabolism
- Nuclear Proteins/antagonists & inhibitors
- Nuclear Proteins/genetics
- Nuclear Proteins/metabolism
- Oxygen/metabolism
- Parkinsonian Disorders/chemically induced
- Parkinsonian Disorders/genetics
- Parkinsonian Disorders/metabolism
- Parkinsonian Disorders/pathology
- Primates
- Protein Binding/drug effects
- Succinic Acid/pharmacology
- Transcription Factors
- Tumor Cells, Cultured
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Affiliation(s)
- F H Agani
- Department of Anatomy, School of Medicine, Case Western Reserve University, Cleveland, Ohio 44106-4938, USA
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Haxhiu MA, Chavez JC, Pichiule P, Erokwu B, Dreshaj IA. The excitatory amino acid glutamate mediates reflexly increased tracheal blood flow and airway submucosal gland secretion. Brain Res 2000; 883:77-86. [PMID: 11063990 DOI: 10.1016/s0006-8993(00)02890-0] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In six decerebrated and in eight alpha-chloralose anesthetized, paralyzed and mechanically ventilated beagle dogs, we have studied involvement of glutamate and glutamate receptors in transmission of excitatory inputs from the airway sensory receptors to the nucleus tractus solitarius and from this site to airway-related vagal preganglionic cells that regulate the tracheal circulation and the submucosal gland secretion. Stimulation of airway sensory fibers by lung deflation-induced reflex increase in tracheal blood flow and submucosal gland secretion. These responses were diminished by prior administration of AMPA/kainate receptor antagonist CNQX into the fourth ventricle (n=6). Furthermore, topical application or microinjection of AMPA/kainate receptor blockers, into the region of the ventrolateral medulla, where airway-related vagal preganglionic neurons are located, abolished the reflex changes in tracheal submucosal gland secretion (n=8); in these dogs mucosal blood flow was not measured). These findings indicate that reflex increase in tracheal blood flow and submucosal gland secretions are mediated mainly via release of glutamate and activation of the AMPA/kainate subtype of glutamate receptors.
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Affiliation(s)
- M A Haxhiu
- Department of Pediatrics, Case Western Reserve University School of Medicine, 10900 Euclid Avenue, Cleveland, OH 44106, USA.
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12
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Affiliation(s)
- P Pichiule
- Department of Neurology, Case Western Reserve University, School of Medicine, Cleveland, Ohio 44106, USA
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13
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León-Velarde F, Richalet JP, Chavez JC, Kacimi R, Rivera-Chira M, Palacios JA, Clark D. Inter and intra-species-related differences in the regulation of the cardiac autonomic system. Comp Biochem Physiol B Biochem Mol Biol 1998; 119:819-23. [PMID: 9787772 DOI: 10.1016/s0305-0491(98)00059-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The heart rate response to isoproterenol (HR-Iso), density and affinity (kd) of beta-adrenergic (beta-AR) and muscarinic (M2) receptors were compared among three rodents with different generation-life histories of confinement and of high altitude exposure. The European guinea pig (Cavia porcellus) (EGp), a laboratory animal that arrived in Europe after the Spanish Conquest of South America and the Peruvian guinea pig (C. porcellus) (PGp), a semi-wild animal that came from the altiplano to sea level at least 25 generations ago, were used for intra-species comparison. Wistar rats (WR) were used for inter-species comparison as representative of a typical sea level laboratory animal. The HR-Iso was lower in EGp than in the PGp. The PGp showed the highest beta-AR density (P < 0.0005) and the highest beta-AR kd values (P < 0.0005) when compared to both EGp and WR groups (beta-AR Bmax (fmol mg-1 prot), WR, 19 +/- 4; Egp, 34 +/- 10; PGp, 74 +/- 15. beta-AR kd (pM), WR, 24 +/- 10; Egp, 17 +/- 7; PGp, 39 +/- 14). In contrast, PGp showed lower M2 receptor density values than the EGp (P < 0.0005). The WR had the highest M2 receptor densities (M2 Bmax (fmol mg-1 prot), WR, 188 +/- 15; Egp, 147 +/- 9; PGp, 118 +/- 6 and M2 kd (pM), WR, 65 +/- 12; Egp, 67 +/- 6; PGp, 92 +/- 2). The inter and intra-species differences found may be related to their respective history of confinement rather than to their history of exposure to high altitude.
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Affiliation(s)
- F León-Velarde
- Universidad Peruana Cayetano Heredia, Dpto. de Ciencias Fisiológicas/Instituto de Investigaciones de la Altura (IIA), Lima, Peru
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León-Velarde F, Richalet JP, Chavez JC, Kacimi R, Rivera-Chira M, Palacios JA, Clark D. Hypoxia- and normoxia-induced reversibility of autonomic control in Andean guinea pig heart. J Appl Physiol (1985) 1996; 81:2229-34. [PMID: 8941549 DOI: 10.1152/jappl.1996.81.5.2229] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
We herein describe the regulation of cardiac receptors in a typical high-altitude native animal. Heart rate response to isoproterenol (HRIso) (beats.min-1.mg Iso.kg-1) and atropine, the density of beta-adrenergic (beta AR) and muscarinic (M2) receptors, and the ventricular content of norepinephrine (NE) and dopamine (DA) were studied in guinea pigs (Cavia porcellus). Animals native to Lima, Peru (150 m) were studied at sea level (SL) and after 5 wk at 4,300-m altitude (SL-HA). Animals native to Rancas [Pasco, Peru (4,300 m)] were studied at high altitude (HA) and after 5 wk at SL (HA-SL). HA animals had a lower HRIso, maximum number of beta AR binding sites (Bmax), beta AR dissociation constant (Kd), NE, and DA (P < 0.05) and a higher M2 Bmax (P < 0.001) when compared with the SL group. HA-SL showed an increase of the HRIso, beta Ar Kd, and NE (P < 0.05) and a decrease of the M2 Bmax and Kd (P < 0.0001) when compared with the HA group. The present study demonstrates the differential regulation and reversibility of the autonomic control in the guinea pig heart.
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Affiliation(s)
- F León-Velarde
- Universidad Peruana Cayetano Heredia, Departamento de Ciencias Fisiológicas/Instituto de Investigaciones de la Altura, Lima, Peru
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