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Wang Z, Song B, Yao J, Li X, Zhang Y, Tang Z, Yi G. Whole-genome analysis reveals distinct adaptation signatures to diverse environments in Chinese domestic pigs. J Anim Sci Biotechnol 2024; 15:97. [PMID: 38982489 PMCID: PMC11234542 DOI: 10.1186/s40104-024-01053-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Accepted: 05/20/2024] [Indexed: 07/11/2024] Open
Abstract
BACKGROUND Long-term natural and artificial selection has resulted in many genetic footprints within the genomes of pig breeds across distinct agroecological zones. Nevertheless, the mechanisms by which these signatures contribute to phenotypic diversity and facilitate environmental adaptation remain unclear. RESULTS Here, we leveraged whole-genome sequencing data from 82 individuals from 6 domestic pig breeds originating in tropical, high-altitude, and frigid regions. Population genetic analysis suggested that habitat isolation significantly shaped the genetic diversity and contributed to population stratification in local Chinese pig breeds. Analysis of selection signals revealed regions under selection for adaptation in tropical (55.5 Mb), high-altitude (43.6 Mb), and frigid (17.72 Mb) regions. The potential functions of the selective sweep regions were linked to certain complex traits that might play critical roles in different geographic environments, including fat coverage in frigid environments and blood indicators in tropical and high-altitude environments. Candidate genes under selection were significantly enriched in biological pathways involved in environmental adaptation. These pathways included blood circulation, protein degradation, and inflammation for adaptation to tropical environments; heart and lung development, hypoxia response, and DNA damage repair for high-altitude adaptation; and thermogenesis, cold-induced vasodilation (CIVD), and the cell cycle for adaptation to frigid environments. By examining the chromatin state of the selection signatures, we identified the lung and ileum as two candidate functional tissues for environmental adaptation. Finally, we identified a mutation (chr1: G246,175,129A) in the cis-regulatory region of ABCA1 as a plausible promising variant for adaptation to tropical environments. CONCLUSIONS In this study, we conducted a genome-wide exploration of the genetic mechanisms underlying the adaptability of local Chinese pig breeds to tropical, high-altitude, and frigid environments. Our findings shed light on the prominent role of cis-regulatory elements in environmental adaptation in pigs and may serve as a valuable biological model of human plateau-related disorders and cardiovascular diseases.
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Affiliation(s)
- Zhen Wang
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, 518124, China
- Kunpeng Institute of Modern Agriculture at Foshan, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Foshan, 528226, China
| | - Bangmin Song
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, 518124, China
- School of Life Sciences, Henan University, Kaifeng, 475004, China
- Shenzhen Research Institute of Henan University, Shenzhen, 518000, China
| | - Jianyu Yao
- State Key Laboratory of Pharmaceutical Biotechnology, The University of Hong Kong, Hong Kong SAR, China
| | - Xingzheng Li
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, 518124, China
- Kunpeng Institute of Modern Agriculture at Foshan, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Foshan, 528226, China
| | - Yan Zhang
- Key Laboratory of Tropical Animal Breeding and Disease Research, Institute of Animal Science and Veterinary Medicine, Hainan Academy of Agricultural Sciences, Haikou, 571100, China
| | - Zhonglin Tang
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, 518124, China.
- Kunpeng Institute of Modern Agriculture at Foshan, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Foshan, 528226, China.
- Bama Yao Autonomous County Rural Revitalization Research Institute, Bama, 547500, China.
| | - Guoqiang Yi
- Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Key Laboratory of Livestock and Poultry Multi-Omics of MARA, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen, 518124, China.
- Kunpeng Institute of Modern Agriculture at Foshan, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Foshan, 528226, China.
- Bama Yao Autonomous County Rural Revitalization Research Institute, Bama, 547500, China.
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Niclou A, Sarma MS. The now and future of human biology at the extremes: An introduction to the special issue. Am J Hum Biol 2024; 36:e24006. [PMID: 37885124 PMCID: PMC10939965 DOI: 10.1002/ajhb.24006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 10/06/2023] [Accepted: 10/09/2023] [Indexed: 10/28/2023] Open
Abstract
OBJECTIVES A hallmark of the human species is our adaptability to a wide range of different ecologies and ecosystems, including some of the most extreme settings. Human biologists have long studied how humans have successfully (and sometimes unsuccessfully) adapted to such extremes, particularly ecological extremes like environments at lower limits of temperature and high altitude. In this special issue, we revisit traditional definitions and explore new conceptions of work in extreme environments. We argue that our definitions of extremes should change with our changing world, and account for extremes unique to the Anthropocene, including environments of inequality and precarity, pandemic landscapes, climate-impacted settings, obesogenic environments, and the environments of human spaceflight. We also explore the future of work at the extremes and provide some suggested guidelines on how human biologists can continue to build and expand on foundational work in this area. CONCLUSION While human biologists have done critical work on groups living in extreme environments, our definitions of humans at the limits continue to change as the world around us also changes. Scholars in this area have a responsibility to re-examine the parameters of extremes to stay at the forefront of scientific exploration and collaboration so human biology, as a discipline, can continue to shape our understanding of adaptability, and thus contribute to the continued thriving of all humans as we endure new climatic, environmental, and societal extremes.
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Affiliation(s)
- Alexandra Niclou
- Pennington Biomedical Research Center, Baton Rouge, Louisiana, United States of America
| | - Mallika S. Sarma
- Johns Hopkins Medicine, Baltimore, Maryland, United States of America
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Leonard WR. Pearl Memorial Lecture. Humans at the extremes: Exploring human adaptation to ecological and social stressors. Am J Hum Biol 2024; 36:e24010. [PMID: 37974340 DOI: 10.1002/ajhb.24010] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 10/22/2023] [Accepted: 10/25/2023] [Indexed: 11/19/2023] Open
Abstract
The field of human biology has long explored how human populations have adapted to extreme environmental circumstances. Yet, it has become increasingly clear that conditions of social stress, poverty, and lifestyle change play equally important roles in shaping human biological variation and health. In this paper, I provide a brief background on the foundational human adaptability research of the International Biological Programme (IBP) from the 1960s, highlighting how its successes and critiques have shaped current research directions in the field. I then discuss and reflect on my own field research that has examined the influence of both environmental and social stresses on human populations living in different ecosystems: the Peruvian Andes, the Siberian arctic, and the Bolivian rainforest. Finally, I consider how the papers in this special issue advance our understanding of human adaptability to extreme conditions and offer directions for future research. Drawing on our field's distinctive evolutionary and biocultural perspectives, human biologists are uniquely positioned to examine how the interplay between social and ecological domains influences the human condition.
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Affiliation(s)
- William R Leonard
- Department of Anthropology & Program in Global Health Studies, Northwestern University, Evanston, Illinois, USA
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Zhang X, Mu H, Zhong Y, Wang R, Li W. Effect of High Altitude Environment on Pharmacokinetic and Pharmacodynamic of Warfarin in Rats. Curr Drug Metab 2024; 25:54-62. [PMID: 38409697 DOI: 10.2174/0113892002277930240201101256] [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: 10/27/2023] [Revised: 12/22/2023] [Accepted: 01/12/2024] [Indexed: 02/28/2024]
Abstract
BACKGROUND High altitude environment affects the pharmacokinetic (PK) parameters of drugs and the PK parameters are an important theoretical basis for guiding the rational clinical use of drugs. Warfarin is an oral anticoagulant of the coumarin class commonly used in clinical practice, but it has a narrow therapeutic window and wide individual variation. However, the effect of high altitude environment on PK and pharmacodynamic (PD) of warfarin is unclear. OBJECTIVE The objective of this study is to investigate the effect of a high altitude environment on PK and PD of warfarin in rats. METHOD Rats were randomly divided into plain group and high altitude group and blood samples were collected through the orbital venous plexus after administration of 2 mg/kg warfarin. Warfarin concentrations in plasma samples were determined by liquid chromatography-tandem mass spectrometry (LC-MS/MS) and PK parameters were calculated by the non-compartment model using WinNonlin 8.1 software. Meanwhile, the expression of PXR, P-gp and CYP2C9 in liver tissues was also determined by western blotting. The effect of high altitude environment on PD of warfarin was explored by measuring activated partial thromboplastin time (APTT) and prothrombin time (PT) values and then calculated international normalized ratio (INR) values based on PT. RESULTS Significant changes in PK behaviors and PD of warfarin in high altitude-rats were observed. Compared with the plain-rats, the peak concentration (Cmax) and the area under the plasma concentration-time curve (AUC) increased significantly by 50.9% and 107.46%, respectively. At the same time, high altitude environment significantly inhibited the expression of PXR, P-gp and CYP2C9 in liver tissues. The results of the PD study showed that high altitude environments significantly prolonged PT, APTT and INR values. CONCLUSION High altitude environment inhibited the metabolism and increased the absorption of warfarin in rats and increased the effect of anticoagulant effect, suggesting that the optimal dose of warfarin for patients at high altitude should be reassessed.
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Affiliation(s)
- Xiaojing Zhang
- Department of Pharmacy, 940th Hospital of Joint Logistic Support Force of Chinese People's Liberation Army, Lanzhou, China
| | - Hongfang Mu
- Department of Pharmacy, 940th Hospital of Joint Logistic Support Force of Chinese People's Liberation Army, Lanzhou, China
| | - Yan Zhong
- Department of Pharmacy, 940th Hospital of Joint Logistic Support Force of Chinese People's Liberation Army, Lanzhou, China
| | - Rong Wang
- Department of Pharmacy, 940th Hospital of Joint Logistic Support Force of Chinese People's Liberation Army, Lanzhou, China
| | - Wenbin Li
- Department of Pharmacy, 940th Hospital of Joint Logistic Support Force of Chinese People's Liberation Army, Lanzhou, China
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Mazzatenta A, Maffei M, Di Giulio C, Neri G. COVID-19 Smell Impairment and Crosstalk with Hypoxia Physiology. Life (Basel) 2022; 12:life12091408. [PMID: 36143443 PMCID: PMC9505897 DOI: 10.3390/life12091408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 09/04/2022] [Accepted: 09/06/2022] [Indexed: 12/21/2022] Open
Abstract
Since its apomorphic appearance in 2019, severe acute respiratory syndrome Coronavirus type 2 (SARS-CoV-2) nowadays circulates as a plesiomorphic human virus in several synapomorphic variants. The respiratory tract is the most important site of infection, the viral effects in the lungs are well described, and more than half of the patients could develop shortness of breath and dyspnea and require ventilatory support. The physiological sign of this condition is the decrease in the partial pressure of oxygen in the blood, leading to acute hypoxia, which could be a factor in the disease. In severe patients, we recorded several physiological parameters: breath frequency (BF), partial pressure of oxygen in the blood (pO2), partial pressure of carbon dioxide in the blood (pCO2), hemoglobin (Hb), heart rate (HR), and blood pressure in correlation with the olfactory threshold. We found significant correlations between reduced olfactory threshold with pO2 and hemoglobin levels, changes in heart rate, and increased HR and pCO2. These results suggest that COVID-19 causes an impaired sense of smell that decreases in threshold corresponding to the disease severity.
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Affiliation(s)
- Andrea Mazzatenta
- Neurophysiology, Olfaction and Chemoreception Laboratory, Physiology and Physiopathology Section, Neuroscience, Imaging and Clinical Sciences Department, G. d’Annunzio University of Chieti-Pescara, 66100 Chieti, Italy
- Correspondence:
| | - Margherita Maffei
- Istituto di Neuroscienze, Consiglio Nazionale delle Ricerche, 56124 Pisa, Italy
| | - Camillo Di Giulio
- Neurophysiology, Olfaction and Chemoreception Laboratory, Physiology and Physiopathology Section, Neuroscience, Imaging and Clinical Sciences Department, G. d’Annunzio University of Chieti-Pescara, 66100 Chieti, Italy
| | - Giampiero Neri
- Neurophysiology, Olfaction and Chemoreception Laboratory, Physiology and Physiopathology Section, Neuroscience, Imaging and Clinical Sciences Department, G. d’Annunzio University of Chieti-Pescara, 66100 Chieti, Italy
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Storz JF, Bautista NM. Altitude acclimatization, hemoglobin-oxygen affinity, and circulatory oxygen transport in hypoxia. Mol Aspects Med 2022; 84:101052. [PMID: 34879970 PMCID: PMC8821351 DOI: 10.1016/j.mam.2021.101052] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 11/12/2021] [Accepted: 11/15/2021] [Indexed: 01/01/2023]
Abstract
In mammals and other air-breathing vertebrates that live at high altitude, adjustments in convective O2 transport via changes in blood hemoglobin (Hb) content and/or Hb-O2 affinity can potentially mitigate the effects of arterial hypoxemia. However, there are conflicting views about the optimal values of such traits in hypoxia, partly due to the intriguing observation that hypoxia-induced acclimatization responses in humans and other predominantly lowland mammals are frequently not aligned in the same direction as evolved phenotypic changes in high-altitude natives. Here we review relevant theoretical and empirical results and we highlight experimental studies of rodents and humans that provide insights into the combination of hematological changes that help attenuate the decline in aerobic performance in hypoxia. For a given severity of hypoxia, experimental results suggest that optimal values for hematological traits are conditional on the states of other interrelated phenotypes that govern different steps in the O2-transport pathway.
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Affiliation(s)
- Jay F Storz
- School of Biological Sciences, University of Nebraska, Lincoln, NE, USA.
| | - Naim M Bautista
- School of Biological Sciences, University of Nebraska, Lincoln, NE, USA
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7
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Ortiz-Prado E, Espinosa PS, Borrero A, Cordovez SP, Vasconez JE, Barreto-Grimales A, Coral-Almeida M, Henriquez-Trujillo AR, Simbaña-Rivera K, Gomez-Barreno L, Viscor G, Roderick P. Stroke-Related Mortality at Different Altitudes: A 17-Year Nationwide Population-Based Analysis From Ecuador. Front Physiol 2021; 12:733928. [PMID: 34675818 PMCID: PMC8525493 DOI: 10.3389/fphys.2021.733928] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 09/08/2021] [Indexed: 12/23/2022] Open
Abstract
Introduction: Worldwide, more than 5.7% of the population reside above 1,500 m of elevation. It has been hypothesized that acute short-term hypoxia exposure could increase the risk of developing a stroke. Studies assessing the effect of altitude on stroke have provided conflicting results, some analyses suggest that long-term chronic exposure could be associated with reduced mortality and lower stroke incidence rates. Methods: An ecological analysis of all stroke hospital admissions, mortality rates, and disability-adjusted life years in Ecuador was performed from 2001 to 2017. The cases and population at risk were categorized in low (<1,500 m), moderate (1,500–2,500 m), high (2,500–3,500 m), and very high altitude (3,500–5,500 m) according to the place of residence. The derived crude and direct standardized age-sex adjusted mortality and hospital admission rates were calculated. Results: A total of 38,201 deaths and 75,893 stroke-related hospital admissions were reported. High altitude populations (HAP) had lower stroke mortality in men [OR: 0.91 (0.88–0.95)] and women [OR: 0.83 (0.79–0.86)]. In addition, HAP had a significant lower risk of getting admitted to the hospital when compared with the low altitude group in men [OR: 0.55 (CI 95% 0.54–0.56)] and women [OR: 0.65 (CI 95% 0.64–0.66)]. Conclusion: This is the first epidemiological study that aims to elucidate the association between stroke and altitude using four different elevation ranges. Our findings suggest that living at higher elevations offers a reduction or the risk of dying due to stroke as well as a reduction in the probability of being admitted to the hospital. Nevertheless, this protective factor has a stronger effect between 2,000 and 3,500 m.
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Affiliation(s)
- Esteban Ortiz-Prado
- One Health Research Group, Faculty of Medicine, Universidad de Las Américas, Quito, Ecuador.,Departamento de Biología Celular, Fisiología e Inmunología, Universitat de Barcelona, Barcelona, Spain
| | - Patricio S Espinosa
- Neurology, Marcus Neuroscience Institute, Boca Raton Regional Hospital, Boca Raton, FL, United States
| | - Alfredo Borrero
- One Health Research Group, Faculty of Medicine, Universidad de Las Américas, Quito, Ecuador
| | - Simone P Cordovez
- One Health Research Group, Faculty of Medicine, Universidad de Las Américas, Quito, Ecuador
| | - Jorge E Vasconez
- One Health Research Group, Faculty of Medicine, Universidad de Las Américas, Quito, Ecuador
| | | | - Marco Coral-Almeida
- One Health Research Group, Faculty of Medicine, Universidad de Las Américas, Quito, Ecuador
| | | | | | - Lenin Gomez-Barreno
- One Health Research Group, Faculty of Medicine, Universidad de Las Américas, Quito, Ecuador
| | - Gines Viscor
- Departamento de Biología Celular, Fisiología e Inmunología, Universitat de Barcelona, Barcelona, Spain
| | - Paul Roderick
- Faculty of Medicine, School of Primary Care, Population Sciences and Medical Education, University of Southampton, Southampton, United Kingdom
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Calderón-Gerstein WS, Torres-Samaniego G. High altitude and cancer: An old controversy. Respir Physiol Neurobiol 2021; 289:103655. [PMID: 33766749 DOI: 10.1016/j.resp.2021.103655] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 03/05/2021] [Accepted: 03/16/2021] [Indexed: 10/21/2022]
Abstract
Ecological studies have found that individuals that live at high altitude regions and in places where ultraviolet radiation is maximal, have lower rates of different types of cancer. However, there is evidence that in these same regions, genetic mutations that are prooncogenic, develop, as they are needed to increase human adaptability to hypoxic environments. Debate has arisen between researchers who consider high altitude environments as suitable for human longevity because of its protective effects against malignancies, and scientists that have reported an increased incidence of different type of cancers in these same regions. Evidence is presented that altitude is related to the development of genetic alterations in micro RNAs, p53 protein, lymphocyte activity, decrease in Fas Ligand and other proapoptotic molecules, as well as increase in prometastatic VGEF an HIF. Notwithstanding, higher vitamin D and ultraviolet B levels, and a better metabolic profile, taken together with lower pollution levels hves been related to lower incidence and mortality rates from malignancies in a series of epidemiological studies.
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Affiliation(s)
- Walter S Calderón-Gerstein
- Universidad Continental, Huancayo, Peru; EsSalud Junín, Peru; Altitude Medicine Research Association (ASIMEDIAL), Peru.
| | - Gabriela Torres-Samaniego
- San Pedro de Cajas Health Post, EsSalud, Tarma, Peru; Altitude Medicine Research Association (ASIMEDIAL), Peru
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Paul S, Gangwar A, Bhargava K, Ahmad Y. D4F prophylaxis enables redox and energy homeostasis while preventing inflammation during hypoxia exposure. Biomed Pharmacother 2021; 133:111083. [PMID: 33378979 DOI: 10.1016/j.biopha.2020.111083] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 11/18/2020] [Accepted: 11/28/2020] [Indexed: 02/02/2023] Open
Abstract
Apo-A1 is correlated with conditions like hyperlipidemia, cardiovascular diseases, high altitude pulmonary edema and etc. where hypoxia constitutes an important facet.Hypoxia causes oxidative stress, vaso-destructive and inflammatory outcomes.Apo-A1 is reported to have vasoprotective, anti-oxidative, anti-apoptotic, and anti-inflammatory effects. However, effects of Apo-A1 augmentation during hypoxia exposure are unknown.In this study, we investigated the effects of exogenously supplementing Apo-A1-mimetic peptide on SD rats during hypoxia exposure. For easing the processes of delivery, absorption and bio-availability, Apo-A1 mimetic peptide D4F was used. The rats were given 10 mg/kg BW dose (i.p.) of D4F for 7 days and then exposed to hypoxia. D4F was observed to attenuate both oxidative stress and inflammation during hypoxic exposure. D4F improved energy homeostasis during hypoxic exposure. D4F did not affect HIF-1a levels during hypoxia but increased MnSOD levels while decreasing CRP and Apo-B levels. D4F showed promise as a prophylactic against hypoxia exposure.
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Affiliation(s)
- Subhojit Paul
- Defence Institute of Physiology & Allied Sciences (DIPAS), Defence R&D Organization (DRDO), Timarpur, New Delhi, 110054, India
| | - Anamika Gangwar
- Defence Institute of Physiology & Allied Sciences (DIPAS), Defence R&D Organization (DRDO), Timarpur, New Delhi, 110054, India
| | - Kalpana Bhargava
- Defence Institute of Physiology & Allied Sciences (DIPAS), Defence R&D Organization (DRDO), Timarpur, New Delhi, 110054, India
| | - Yasmin Ahmad
- Defence Institute of Physiology & Allied Sciences (DIPAS), Defence R&D Organization (DRDO), Timarpur, New Delhi, 110054, India.
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Soliz J, Schneider-Gasser EM, Arias-Reyes C, Aliaga-Raduan F, Poma-Machicao L, Zubieta-Calleja G, Furuya WI, Trevizan-Baú P, Dhingra RR, Dutschmann M. Coping with hypoxemia: Could erythropoietin (EPO) be an adjuvant treatment of COVID-19? Respir Physiol Neurobiol 2020; 279:103476. [PMID: 32522574 PMCID: PMC7275159 DOI: 10.1016/j.resp.2020.103476] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Revised: 05/29/2020] [Accepted: 05/30/2020] [Indexed: 12/13/2022]
Abstract
A very recent epidemiological study provides preliminary evidence that living in habitats located at 2500 m above sea level (masl) might protect from the development of severe respiratory symptoms following infection with the novel SARS-CoV-2 virus. This epidemiological finding raises the question of whether physiological mechanisms underlying the acclimatization to high altitude identifies therapeutic targets for the effective treatment of severe acute respiratory syndrome pivotal to the reduction of global mortality during the COVID-19 pandemic. This article compares the symptoms of acute mountain sickness (AMS) with those of SARS-CoV-2 infection and explores overlapping patho-physiological mechanisms of the respiratory system including impaired oxygen transport, pulmonary gas exchange and brainstem circuits controlling respiration. In this context, we also discuss the potential impact of SARS-CoV-2 infection on oxygen sensing in the carotid body. Finally, since erythropoietin (EPO) is an effective prophylactic treatment for AMS, this article reviews the potential benefits of implementing FDA-approved erythropoietin-based (EPO) drug therapies to counteract a variety of acute respiratory and non-respiratory (e.g. excessive inflammation of vascular beds) symptoms of SARS-CoV-2 infection.
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Affiliation(s)
- Jorge Soliz
- Institute Universitaire de Cardiologie et de Pneumologie de Québec (IUCPQ), Faculty of Medicine, Université Laval, Québec, QC, Canada; High Altitude Pulmonary and Pathology Institute IPPA, La Paz, Bolivia.
| | - Edith M Schneider-Gasser
- Institute of Veterinary Physiology, Vetsuisse-Faculty University of Zurich, Winterthurerstrasse 260, Switzerland
| | - Christian Arias-Reyes
- Institute Universitaire de Cardiologie et de Pneumologie de Québec (IUCPQ), Faculty of Medicine, Université Laval, Québec, QC, Canada
| | - Fernanda Aliaga-Raduan
- Institute Universitaire de Cardiologie et de Pneumologie de Québec (IUCPQ), Faculty of Medicine, Université Laval, Québec, QC, Canada
| | - Liliana Poma-Machicao
- Institute Universitaire de Cardiologie et de Pneumologie de Québec (IUCPQ), Faculty of Medicine, Université Laval, Québec, QC, Canada
| | | | - Werner I Furuya
- Florey Institute of Neuroscience and Mental Health, Melbourne Victoria, Australia; The Florey Department of Neuroscience, University of Melbourne, Melbourne Victoria, Australia
| | - Pedro Trevizan-Baú
- Florey Institute of Neuroscience and Mental Health, Melbourne Victoria, Australia; The Florey Department of Neuroscience, University of Melbourne, Melbourne Victoria, Australia
| | - Rishi R Dhingra
- Florey Institute of Neuroscience and Mental Health, Melbourne Victoria, Australia
| | - Mathias Dutschmann
- Florey Institute of Neuroscience and Mental Health, Melbourne Victoria, Australia; The Florey Department of Neuroscience, University of Melbourne, Melbourne Victoria, Australia
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11
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Moreng RE. Incubation and Growth of Fowls and Turkeys in High Altitude Environments. WORLD POULTRY SCI J 2019. [DOI: 10.1079/wps19830005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- R. E. Moreng
- Colorado State University, Fort Collins, Colorado 80523
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12
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Ketfi A, Gharnaout M, Ben Saad H. Les équations de référence pléthysmographiques établies chez les adultes natifs de l’Est Algérien sont inapplicables pour ceux natifs du Nord Algérien. Rev Mal Respir 2019; 36:870-879. [DOI: 10.1016/j.rmr.2019.05.042] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Accepted: 05/17/2019] [Indexed: 01/10/2023]
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Berger E, Magliaro C, Paczia N, Monzel AS, Antony P, Linster CL, Bolognin S, Ahluwalia A, Schwamborn JC. Millifluidic culture improves human midbrain organoid vitality and differentiation. LAB ON A CHIP 2018; 18:3172-3183. [PMID: 30204191 DOI: 10.1039/c8lc00206a] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Human midbrain-specific organoids (hMOs) serve as an experimental in vitro model for studying the pathogenesis of Parkinson's disease (PD). In hMOs, neuroepithelial stem cells (NESCs) give rise to functional midbrain dopaminergic (mDA) neurons that are selectively degenerating during PD. A limitation of the hMO model is an under-supply of oxygen and nutrients to the densely packed core region, which leads eventually to a "dead core". To reduce this phenomenon, we applied a millifluidic culture system that ensures media supply by continuous laminar flow. We developed a computational model of oxygen transport and consumption in order to predict oxygen levels within the hMOs. The modelling predicts higher oxygen levels in the hMO core region under millifluidic conditions. In agreement with the computational model, a significantly smaller "dead core" was observed in hMOs cultured in a bioreactor system compared to those ones kept under conventional shaking conditions. Comparing the necrotic core regions in the organoids with those obtained from the model allowed an estimation of the critical oxygen concentration necessary for ensuring cell vitality. Besides the reduced "dead core" size, the differentiation efficiency from NESCs to mDA neurons was elevated in hMOs exposed to medium flow. Increased differentiation involved a metabolic maturation process that was further developed in the millifluidic culture. Overall, bioreactor conditions that improve hMO quality are worth considering in the context of advanced PD modelling.
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Affiliation(s)
- Emanuel Berger
- University of Luxembourg (UL), Centre for Systems Biomedicine (LCSB) - Developmental and Cellular Biology group, Luxembourg.
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Rathnasamy G, Foulds WS, Ling EA, Kaur C. Retinal microglia - A key player in healthy and diseased retina. Prog Neurobiol 2018; 173:18-40. [PMID: 29864456 DOI: 10.1016/j.pneurobio.2018.05.006] [Citation(s) in RCA: 127] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Revised: 03/09/2018] [Accepted: 05/29/2018] [Indexed: 01/04/2023]
Abstract
Microglia, the resident immune cells of the brain and retina, are constantly engaged in the surveillance of their surrounding neural tissue. During embryonic development they infiltrate the retinal tissues and participate in the phagocytosis of redundant neurons. The contribution of microglia in maintaining the purposeful and functional histo-architecture of the adult retina is indispensable. Within the retinal microenvironment, robust microglial activation is elicited by subtle changes caused by extrinsic and intrinsic factors. When there is a disturbance in the cell-cell communication between microglia and other retinal cells, for example in retinal injury, the activated microglia can manifest actions that can be detrimental. This is evidenced by activated microglia secreting inflammatory mediators that can further aggravate the retinal injury. Microglial activation as a harbinger of a variety of retinal diseases is well documented by many studies. In addition, a change in the microglial phenotype which may be associated with aging, may predispose the retina to age-related diseases. In light of the above, the focus of this review is to highlight the role played by microglia in the healthy and diseased retina, based on findings of our own work and from that of others.
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Affiliation(s)
- Gurugirijha Rathnasamy
- Department of Anatomy, Yong Loo Lin School of Medicine, Blk MD10, 4 Medical Drive, National University of Singapore, 117594, Singapore; Department of Ophthalmology and Visual Sciences, School of Medicine and Public Health, University of Wisconsin, Madison, WI, 53706, United States
| | - Wallace S Foulds
- Singapore Eye Research Institute Level 6, The Academia, Discovery Tower, 20 College Road, 169856, Singapore; University of Glasgow, Glasgow, Scotland, G12 8QQ, United Kingdom
| | - Eng-Ang Ling
- Department of Anatomy, Yong Loo Lin School of Medicine, Blk MD10, 4 Medical Drive, National University of Singapore, 117594, Singapore
| | - Charanjit Kaur
- Department of Anatomy, Yong Loo Lin School of Medicine, Blk MD10, 4 Medical Drive, National University of Singapore, 117594, Singapore.
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15
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Leonard WR. Centennial perspective on human adaptability. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2018; 165:813-833. [DOI: 10.1002/ajpa.23401] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2017] [Revised: 12/19/2017] [Accepted: 12/20/2017] [Indexed: 12/19/2022]
Affiliation(s)
- William R. Leonard
- Department of Anthropology; Northwestern University; Evanston Illinois 60208
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16
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Goldstein DS, Kopin IJ. Homeostatic systems, biocybernetics, and autonomic neuroscience. Auton Neurosci 2017; 208:15-28. [PMID: 28918243 PMCID: PMC5819891 DOI: 10.1016/j.autneu.2017.09.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 09/02/2017] [Accepted: 09/04/2017] [Indexed: 12/20/2022]
Abstract
In this review we describe a series of major concepts introduced during the past 150years that have contributed to our current understanding about how physiological processes required for well-being and survival are regulated. One can theorize that hierarchical networks involving input-output relationships continuously orchestrate and learn adaptive patterns of observable behaviors, cognition, memory, mood, and autonomic systems. Taken together, these networks function as "good regulators" determining levels of internal variables and act as if there were homeostatic comparators ("homeostats"). The consequences of models with vs. without homeostats remain the same in terms of allostatic load and the eventual switch from stabilizing negative feedback loops to destabilizing, pathogenic positive feedback loops. Understanding this switch seems important for comprehending senescence-related, neurodegenerative disorders that involve the autonomic nervous system. Our general proposal is that disintegration of homeostatic systems causes disorders of regulation in degenerative diseases and that medical cybernetics can inspire and rationalize new approaches to treatment and prevention.
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Affiliation(s)
- David S Goldstein
- Clinical Neurocardiology Section, Clinical Neurosciences Program, Division of Intramural Research, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892-1620, USA.
| | - Irwin J Kopin
- Clinical Neurocardiology Section, Clinical Neurosciences Program, Division of Intramural Research, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892-1620, USA
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Gao Z, Luo G, Ni B. Progress in Mass Spectrometry-Based Proteomics in Hypoxia-Related Diseases and High-Altitude Medicine. OMICS-A JOURNAL OF INTEGRATIVE BIOLOGY 2017; 21:305-313. [PMID: 28486083 DOI: 10.1089/omi.2016.0187] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Human migration, influenced by social conflict and natural disasters as well as global climate change, has become recognized as a major "planetary force." It has also brought to the forefront, new specialties of integrative biology-such as high-altitude medicine-and the impact of hitherto understudied environmental factors on human pathophysiology in these new geographical settings. For people migrating to or living in high-altitude regions, environmental hypoxia is a primary challenge. Decreased partial pressure of oxygen in environmental air, caused by lower barometric pressure, puts living organisms in a hypoxic state. When there is a serious inability to adapt, death may ensue. Research efforts over the past few years have applied mass spectrometry-based proteomics analyses to uncover the mechanisms of hypoxia-related high-altitude pathophysiology. The differential proteomic profiles in plasma and tissues under high-altitude hypoxia conditions, as compared with sea level controls, and the multitudinous hypoxia-specific proteins identified elucidate mechanisms underlying high-altitude hypoxia acclimatization and diseases, and provide a foundation for development of new therapeutic, prophylactic, and diagnostic approaches. In this expert review and innovation analysis, we highlight the current proteomics findings on high-altitude hypoxia, and suggest paths forward toward effective interventions to address this key challenge in high-altitude medicine.
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Affiliation(s)
- Zhiqi Gao
- Department of Pathophysiology and High-Altitude Pathology/Key Laboratory of High-Altitude Environment Medicine (Third Military Medical University), Ministry of Education/Key Laboratory of High-Altitude Medicine, College of High-Altitude Military Medicine, Third Military Medical University , Chongqing, PR China
| | - Gang Luo
- Department of Pathophysiology and High-Altitude Pathology/Key Laboratory of High-Altitude Environment Medicine (Third Military Medical University), Ministry of Education/Key Laboratory of High-Altitude Medicine, College of High-Altitude Military Medicine, Third Military Medical University , Chongqing, PR China
| | - Bing Ni
- Department of Pathophysiology and High-Altitude Pathology/Key Laboratory of High-Altitude Environment Medicine (Third Military Medical University), Ministry of Education/Key Laboratory of High-Altitude Medicine, College of High-Altitude Military Medicine, Third Military Medical University , Chongqing, PR China
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Zhang LC, Huang Z, Li PB, Nie HJ, Deng BN, Duan RF, Xiao ZH, Peng H, Feng H, Liu W. Diazoxide protects rat vascular endothelial cells against hypoxia and cold-induced damage. Exp Ther Med 2017; 13:3257-3266. [PMID: 28587398 PMCID: PMC5450562 DOI: 10.3892/etm.2017.4437] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Accepted: 01/26/2017] [Indexed: 02/07/2023] Open
Abstract
The present study aimed to examine the effects of hypoxia and cold on vascular endothelial cells (VECs), as well as the protective ability of novel VECs-protective drugs against these injuries. A rat model simulating exposure to hypoxia and cold at high altitude environments was established. Based on these animal experiments, rat aortic VECs were established as injury models and exposed to hypoxia and/or adrenaline (ADR) in vitro. The results revealed that hypoxia significantly altered the levels of nitric oxide and vascular endothelial growth factor, while the cold temperature significantly increased the release of ADR and noradrenaline. Exposure to hypoxia combined with cold temperature significantly affected all these indices. In vitro experiments demonstrated that hypoxia, ADR (which was used to simulate cold in the animal experiments) and the combination of the two factors resulted in damage to the VECs and endothelial dysfunction. In addition, the results also showed that diazoxide, a highly selective mitoKATP opener, protected VECs against these injuries. In conclusion, hypoxia and cold temperature induced endothelial cell dysfunction and endocrine disorders, respectively. Improving endothelial function using diazoxide may be an effective therapeutic strategy in patients with altitude-associated disorders. However, the potential for clinical application requires further study.
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Affiliation(s)
- Lian-Cheng Zhang
- Department of Environment and Pharmacy, Tianjin Institute of Health and Environmental Medicine, Tianjin 300050, P.R. China
| | - Zhao Huang
- Tianjin Key Laboratory of Exercise Physiology and Sports Medicine, Tianjin University of Sport, Tianjin 300381, P.R. China
| | - Pei-Bing Li
- Department of Environment and Pharmacy, Tianjin Institute of Health and Environmental Medicine, Tianjin 300050, P.R. China
| | - Hong-Jing Nie
- Department of Environment and Pharmacy, Tianjin Institute of Health and Environmental Medicine, Tianjin 300050, P.R. China
| | - Bing-Nan Deng
- Department of Environment and Pharmacy, Tianjin Institute of Health and Environmental Medicine, Tianjin 300050, P.R. China
| | - Rui-Feng Duan
- Department of Environment and Pharmacy, Tianjin Institute of Health and Environmental Medicine, Tianjin 300050, P.R. China
| | - Zhong-Hai Xiao
- Department of Environment and Pharmacy, Tianjin Institute of Health and Environmental Medicine, Tianjin 300050, P.R. China
| | - Hui Peng
- Department of Environment and Pharmacy, Tianjin Institute of Health and Environmental Medicine, Tianjin 300050, P.R. China
| | - Hong Feng
- Tianjin Key Laboratory of Exercise Physiology and Sports Medicine, Tianjin University of Sport, Tianjin 300381, P.R. China
| | - Wei Liu
- Department of Environment and Pharmacy, Tianjin Institute of Health and Environmental Medicine, Tianjin 300050, P.R. China
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19
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On the adhesion-cohesion balance and oxygen consumption characteristics of liver organoids. PLoS One 2017; 12:e0173206. [PMID: 28267799 PMCID: PMC5340403 DOI: 10.1371/journal.pone.0173206] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Accepted: 02/16/2017] [Indexed: 01/16/2023] Open
Abstract
Liver organoids (LOs) are of interest in tissue replacement, hepatotoxicity and pathophysiological studies. However, it is still unclear what triggers LO self-assembly and what the optimal environment is for their culture. Hypothesizing that LO formation occurs as a result of a fine balance between cell-substrate adhesion and cell-cell cohesion, we used 3 cell types (hepatocytes, liver sinusoidal endothelial cells and mesenchymal stem cells) to investigate LO self-assembly on different substrates keeping the culture parameters (e.g. culture media, cell types/number) and substrate stiffness constant. As cellular spheroids may suffer from oxygen depletion in the core, we also sought to identify the optimal culture conditions for LOs in order to guarantee an adequate supply of oxygen during proliferation and differentiation. The oxygen consumption characteristics of LOs were measured using an O2 sensor and used to model the O2 concentration gradient in the organoids. We show that no LO formation occurs on highly adhesive hepatic extra-cellular matrix-based substrates, suggesting that cellular aggregation requires an optimal trade-off between the adhesiveness of a substrate and the cohesive forces between cells and that this balance is modulated by substrate mechanics. Thus, in addition to substrate stiffness, physicochemical properties, which are also critical for cell adhesion, play a role in LO self-assembly.
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20
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Wei W, Wang X, Gong Q, Fan M, Zhang J. Cortical Thickness of Native Tibetans in the Qinghai-Tibetan Plateau. AJNR Am J Neuroradiol 2017; 38:553-560. [PMID: 28104637 DOI: 10.3174/ajnr.a5050] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 10/24/2016] [Indexed: 02/05/2023]
Abstract
BACKGROUND AND PURPOSE High-altitude environmental factors and genetic variants together could have exerted their effects on the human brain. The present study was designed to investigate the cerebral morphology in high-altitude native Tibetans. MATERIALS AND METHODS T1-weighted brain images were obtained from 77 Tibetan adolescents on the Qinghai-Tibetan Plateau (altitude, 2300-5300 m) and 80 matched Han controls living at sea level. Cortical thickness, curvature, and sulcus were analyzed by using FreeSurfer. RESULTS Cortical thickness was significantly decreased in the left posterior cingulate cortex, lingual gyrus, superior parietal cortex, precuneus, and rostral middle frontal cortex and the right medial orbitofrontal cortex, lateral occipital cortex, precuneus, and paracentral lobule. Curvature was significantly decreased in the left superior parietal cortex and right superior marginal gyrus; the depth of the sulcus was significantly increased in the left inferior temporal gyrus and significantly decreased in the right superior marginal gyrus, superior temporal gyrus, and insular cortex. Moreover, cortical thickness was negatively correlated with altitude in the left superior and middle temporal gyri, rostral middle frontal cortex, insular cortex, posterior cingulate cortex, precuneus, lingual gyrus, and the right superior temporal gyrus. Curvature was positively correlated with altitude in the left rostral middle frontal cortex, insular cortex, and middle temporal gyrus. The depth of the sulcus was negatively correlated with altitude in the left lingual gyrus and right medial orbitofrontal cortex. CONCLUSIONS Differences in cortical morphometry in native Tibetans may reflect adaptations related to high altitude.
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Affiliation(s)
- W Wei
- From the MRI Center (W.W.), First Affiliated Hospital of Xiamen University, Xiamen, China.,Institute of Brain Disease and Cognition (W.W., J.Z.), Medical College of Xiamen University, Xiamen, China
| | - X Wang
- Department of Neurology (X.W.), Affiliated Hospital of Hangzhou Normal University, Hangzhou, China
| | - Q Gong
- Huaxi Magnetic Resonance Research Center (Q.G.), West China Hospital, Sichuan University, Chengdu, China
| | - M Fan
- Department of Cognitive Sciences (M.F.), Institute of Basic Medical Sciences, Beijing, China
| | - J Zhang
- Institute of Brain Disease and Cognition (W.W., J.Z.), Medical College of Xiamen University, Xiamen, China
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Wang R, Sun Y, Yin Q, Xie H, Li W, Wang C, Guo J, Hao Y, Tao R, Jia Z. The effects of metronidazole on Cytochrome P450 Activity and Expression in rats after acute exposure to high altitude of 4300m. Biomed Pharmacother 2017; 85:296-302. [DOI: 10.1016/j.biopha.2016.11.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Revised: 10/14/2016] [Accepted: 11/08/2016] [Indexed: 11/28/2022] Open
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22
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Liu B, Huang H, Wang SX, Wu G, Xu G, Sun BD, Zhang EL, Gao YQ. Physiological Adjustments and Circulating MicroRNA Reprogramming Are Involved in Early Acclimatization to High Altitude in Chinese Han Males. Front Physiol 2016; 7:601. [PMID: 27994555 PMCID: PMC5133430 DOI: 10.3389/fphys.2016.00601] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Accepted: 11/18/2016] [Indexed: 01/08/2023] Open
Abstract
Background: Altitude acclimatization is a physiological process that restores oxygen delivery to the tissues and promotes oxygen use under high altitude hypoxia. High altitude sickness occurs in individuals without acclimatization. Unraveling the molecular underpinnings of altitude acclimatization could help understand the beneficial body responses to high altitude hypoxia as well as the altered biological events in un-acclimatized individuals. This study assessed physiological adjustments and circulating microRNA (cmiRNA) profiles in individuals exposed to high altitude, aiming to explore altitude acclimatization in humans. Methods: Ninety volunteers were enrolled in this study. Among them, 22 individuals provided samples for microRNA arrays; 68 additional individuals constituted the validation set. Un-acclimatized individuals were identified by the Lake Louise Scoring System. Thirty-three phenotypes were recorded pre- and post-exposure to high altitude, including stress hormones, lipid profiles, hematological indices, myocardial enzyme spectrum, and liver and kidney function related enzymes. CmiRNA expression profiles were assessed using miRCURYTM LNA Array (v.18.0) screening, with data validated by quantitative reverse-transcription polymerase chain reaction (qRT-PCR). Then, associations of plasma microRNA expression with physiological adjustments were evaluated. The biological relevance of the main differentially expressed cmiRNAs was explored by bioinformatics prediction. Results: Nineteen of the 33 phenotypes were significantly altered during early altitude acclimatization, including hematological indices, lipid profiles, and stress hormones; meanwhile, 86 cmiRNAs (79 up-regulated and 7 down-regulated) showed differential expression with statistical significance. Among them, 32 and 25 microRNAs were strongly correlated with low-density lipoprotein-cholesterol and total cholesterol elevations, respectively. In addition, 22 microRNAs were closely correlated with cortisol increase. In un-acclimatized individuals, 55 cmiRNAs were up-regulated and 36 down-regulated, compared with acclimatized individuals. The HIF signaling pathway was suppressed in un-acclimatized individuals. Conclusion: Physiological adjustments, including the hematological system, stress hormones, and lipid molecules contributed to early altitude acclimatization, and showed strong correlations with cmiRNA reprogramming. Moreover, acclimatized and un-acclimatized individuals showed different cmiRNA profile. Suppression of the HIF-1 signaling pathway by microRNA regulation may play a key role in the pathogenesis of un-acclimatization with high altitude hypoxia.
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Affiliation(s)
- Bao Liu
- Key Laboratory of High Altitude Environmental Medicine, Third Military Medical University, Ministry of EducationChongqing, China
- Key Laboratory of High Altitude Medicine, PLAChongqing, China
- Key Laboratory of High Altitude Medicine, Institute of Medicine and Hygienic Equipment for High Altitude Region, College of High Altitude Military Medicine, Third Military Medical University, Ministry of Education of ChinaChongqing, China
| | - He Huang
- Key Laboratory of High Altitude Environmental Medicine, Third Military Medical University, Ministry of EducationChongqing, China
- Key Laboratory of High Altitude Medicine, PLAChongqing, China
- Key Laboratory of High Altitude Medicine, Institute of Medicine and Hygienic Equipment for High Altitude Region, College of High Altitude Military Medicine, Third Military Medical University, Ministry of Education of ChinaChongqing, China
| | - Shou-Xian Wang
- Key Laboratory of High Altitude Environmental Medicine, Third Military Medical University, Ministry of EducationChongqing, China
- Key Laboratory of High Altitude Medicine, PLAChongqing, China
- Key Laboratory of High Altitude Medicine, Institute of Medicine and Hygienic Equipment for High Altitude Region, College of High Altitude Military Medicine, Third Military Medical University, Ministry of Education of ChinaChongqing, China
| | - Gang Wu
- Key Laboratory of High Altitude Environmental Medicine, Third Military Medical University, Ministry of EducationChongqing, China
- Key Laboratory of High Altitude Medicine, PLAChongqing, China
- Key Laboratory of High Altitude Medicine, Institute of Medicine and Hygienic Equipment for High Altitude Region, College of High Altitude Military Medicine, Third Military Medical University, Ministry of Education of ChinaChongqing, China
| | - Gang Xu
- Key Laboratory of High Altitude Environmental Medicine, Third Military Medical University, Ministry of EducationChongqing, China
- Key Laboratory of High Altitude Medicine, PLAChongqing, China
- Key Laboratory of High Altitude Medicine, Institute of Medicine and Hygienic Equipment for High Altitude Region, College of High Altitude Military Medicine, Third Military Medical University, Ministry of Education of ChinaChongqing, China
| | - Bing-Da Sun
- Key Laboratory of High Altitude Environmental Medicine, Third Military Medical University, Ministry of EducationChongqing, China
- Key Laboratory of High Altitude Medicine, PLAChongqing, China
- Key Laboratory of High Altitude Medicine, Institute of Medicine and Hygienic Equipment for High Altitude Region, College of High Altitude Military Medicine, Third Military Medical University, Ministry of Education of ChinaChongqing, China
| | - Er-Long Zhang
- Key Laboratory of High Altitude Environmental Medicine, Third Military Medical University, Ministry of EducationChongqing, China
- Key Laboratory of High Altitude Medicine, PLAChongqing, China
- Key Laboratory of High Altitude Medicine, Institute of Medicine and Hygienic Equipment for High Altitude Region, College of High Altitude Military Medicine, Third Military Medical University, Ministry of Education of ChinaChongqing, China
| | - Yu-Qi Gao
- Key Laboratory of High Altitude Environmental Medicine, Third Military Medical University, Ministry of EducationChongqing, China
- Key Laboratory of High Altitude Medicine, PLAChongqing, China
- Key Laboratory of High Altitude Medicine, Institute of Medicine and Hygienic Equipment for High Altitude Region, College of High Altitude Military Medicine, Third Military Medical University, Ministry of Education of ChinaChongqing, China
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Storz JF. Hemoglobin-oxygen affinity in high-altitude vertebrates: is there evidence for an adaptive trend? J Exp Biol 2016; 219:3190-3203. [PMID: 27802149 PMCID: PMC5091379 DOI: 10.1242/jeb.127134] [Citation(s) in RCA: 80] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
In air-breathing vertebrates at high altitude, fine-tuned adjustments in hemoglobin (Hb)-O2 affinity provide an energetically efficient means of mitigating the effects of arterial hypoxemia. However, it is not always clear whether an increased or decreased Hb-O2 affinity should be expected to improve tissue O2 delivery under different degrees of hypoxia, due to the inherent trade-off between arterial O2 loading and peripheral O2 unloading. Theoretical results indicate that the optimal Hb-O2 affinity varies as a non-linear function of environmental O2 availability, and the threshold elevation at which an increased Hb-O2 affinity becomes advantageous depends on the magnitude of diffusion limitation (the extent to which O2 equilibration at the blood-gas interface is limited by the kinetics of O2 exchange). This body of theory provides a framework for interpreting the possible adaptive significance of evolved changes in Hb-O2 affinity in vertebrates that have colonized high-altitude environments. To evaluate the evidence for an empirical generalization and to test theoretical predictions, I synthesized comparative data in a phylogenetic framework to assess the strength of the relationship between Hb-O2 affinity and native elevation in mammals and birds. Evidence for a general trend in mammals is equivocal, but there is a remarkably strong positive relationship between Hb-O2 affinity and native elevation in birds. Evolved changes in Hb function in high-altitude birds provide one of the most compelling examples of convergent biochemical adaptation in vertebrates.
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Affiliation(s)
- Jay F Storz
- School of Biological Sciences, University of Nebraska, Lincoln, NE 68588, USA
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Llapur CJ, Martínez MR, Grassino PT, Stok A, Altieri HH, Bonilla F, Caram MM, Krowchuk NM, Kirby M, Coxson HO, Tepper RS. Chronic Hypoxia Accentuates Dysanaptic Lung Growth. Am J Respir Crit Care Med 2016; 194:327-32. [DOI: 10.1164/rccm.201509-1851oc] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Staempfli R, Schmid JP, Schenker S, Eser P, Trachsel LD, Deluigi C, Wustmann K, Thomet C, Greutmann M, Tobler D, Stambach D, Wilhelm M, Schwerzmann M. Cardiopulmonary adaptation to short-term high altitude exposure in adult Fontan patients. Heart 2016; 102:1296-301. [DOI: 10.1136/heartjnl-2016-309682] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Accepted: 04/28/2016] [Indexed: 11/04/2022] Open
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Eichstaedt CA, Antão T, Cardona A, Pagani L, Kivisild T, Mormina M. Genetic and phenotypic differentiation of an Andean intermediate altitude population. Physiol Rep 2015; 3:e12376. [PMID: 25948820 PMCID: PMC4463816 DOI: 10.14814/phy2.12376] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Revised: 03/15/2015] [Accepted: 03/19/2015] [Indexed: 12/21/2022] Open
Abstract
Highland populations living permanently under hypobaric hypoxia have been subject of extensive research because of the relevance of their physiological adaptations for the understanding of human health and disease. In this context, what is considered high altitude is a matter of interpretation and while the adaptive processes at high altitude (above 3000 m) are well documented, the effects of moderate altitude (below 3000 m) on the phenotype are less well established. In this study, we compare physiological and anthropometric characteristics as well as genetic variations in two Andean populations: the Calchaquíes (2300 m) and neighboring Collas (3500 m). We compare their phenotype and genotype to the sea-level Wichí population. We measured physiological (heart rate, oxygen saturation, respiration rate, and lung function) as well as anthropometric traits (height, sitting height, weight, forearm, and tibia length). We conducted genome-wide genotyping on a subset of the sample (n = 74) and performed various scans for positive selection. At the phenotypic level (n = 179), increased lung capacity stood out in both Andean groups, whereas a growth reduction in distal limbs was only observed at high altitude. At the genome level, Calchaquíes revealed strong signals around PRKG1, suggesting that the nitric oxide pathway may be a target of selection. PRKG1 was highlighted by one of four selection tests among the top five genes using the population branch statistic. Selection tests results of Collas were reported previously. Overall, our study shows that some phenotypic and genetic differentiation occurs at intermediate altitude in response to moderate lifelong selection pressures.
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Affiliation(s)
- Christina A Eichstaedt
- Division of Biological Anthropology, University of Cambridge, Cambridge, Cambridgeshire, UK Centre for Pulmonary Hypertension, Thoraxclinic at the University Hospital Heidelberg, Heidelberg, Baden-Württemberg, Germany
| | - Tiago Antão
- Department of Vector Biology, Liverpool School of Tropical Medicine, Liverpool, Lancashire, UK
| | - Alexia Cardona
- Division of Biological Anthropology, University of Cambridge, Cambridge, Cambridgeshire, UK
| | - Luca Pagani
- Division of Biological Anthropology, University of Cambridge, Cambridge, Cambridgeshire, UK Wellcome Trust Sanger Institute, Hinxton, Cambridgeshire, UK
| | - Toomas Kivisild
- Division of Biological Anthropology, University of Cambridge, Cambridge, Cambridgeshire, UK
| | - Maru Mormina
- Division of Biological Anthropology, University of Cambridge, Cambridge, Cambridgeshire, UK Faculty of Humanities and Social Sciences, University of Winchester, Winchester, Hampshire, UK School of Chemistry, University of East Anglia, Norwich, Norfolk, UK
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Design Criteria for Generating Physiologically Relevant In Vitro Models in Bioreactors. Processes (Basel) 2014. [DOI: 10.3390/pr2030548] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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28
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Frisancho AR. Developmental functional adaptation to high altitude: review. Am J Hum Biol 2014; 25:151-68. [PMID: 24065360 DOI: 10.1002/ajhb.22367] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/26/2012] [Indexed: 11/12/2022] Open
Abstract
Various approaches have been used to understand the origins of the functional traits that characterize the Andean high-altitude native. Based on the conceptual framework of developmental functional adaptation which postulates that environmental influences during the period of growth and development have long lasting effects that may be expressed during adulthood, we initiated a series of studies addressed at determining the pattern of physical growth and the contribution of growth and development to the attainment of full functional adaptation to high-altitude of low and high altitude natives living under rural and urban conditions. Current research indicate that: (a) the pattern of growth at high altitude due to limited nutritional resources, physical growth in body size is delayed but growth in lung volumes is accelerated because of hypoxic stress); (b) low-altitude male and female urban natives can attain a full functional adaptation to high altitude by exposure to high-altitude hypoxia during the period of growth and development; (c) both experimental studies on animals and comparative human studies indicate that exposure to high altitude during the period of growth and development results in the attainment of a large residual lung volume; (d) this developmentally acquired enlarged residual lung volume and its associated increase in alveolar area when combined with the increased tissue capillarization and moderate increase in red blood cells and hemoglobin concentration contributes to the successful functional adaptation of the Andean high-altitude native to hypoxia; and (e) any specific genetic traits that are related to the successful functional adaptation of Andean high-altitude natives have yet to be identified.
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Affiliation(s)
- A Roberto Frisancho
- Department of Anthropology and Center for Human Growth and Development, University of Michigan, Ann Arbor, Michigan, 48109-1092
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Klepsatel P, Gáliková M, Huber CD, Flatt T. SIMILARITIES AND DIFFERENCES IN ALTITUDINAL VERSUS LATITUDINAL VARIATION FOR MORPHOLOGICAL TRAITS INDROSOPHILA MELANOGASTER. Evolution 2014; 68:1385-98. [DOI: 10.1111/evo.12351] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2013] [Accepted: 12/17/2013] [Indexed: 11/30/2022]
Affiliation(s)
- Peter Klepsatel
- Institut für Populationsgenetik; Vetmeduni Vienna; Veterinärplatz 1, A-1210 Vienna Austria
| | - Martina Gáliková
- Institut für Populationsgenetik; Vetmeduni Vienna; Veterinärplatz 1, A-1210 Vienna Austria
| | - Christian D. Huber
- Institut für Populationsgenetik; Vetmeduni Vienna; Veterinärplatz 1, A-1210 Vienna Austria
- Max F. Perutz Laboratories; University of Vienna; Campus Vienna Biocenter 5, Dr. Bohr Gasse 9 A-1030 Vienna Austria
| | - Thomas Flatt
- Institut für Populationsgenetik; Vetmeduni Vienna; Veterinärplatz 1, A-1210 Vienna Austria
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30
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Zhang G, Zhou SM, Yuan C, Tian HJ, Li P, Gao YQ. The Effects of Short-Term and Long-Term Exposure to a High Altitude Hypoxic Environment on Neurobehavioral Function. High Alt Med Biol 2013; 14:338-41. [DOI: 10.1089/ham.2012.1091] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Gang Zhang
- Department of High Altitude Military Hygiene, College of High Altitude Military Medicine, Third Military Medical University, Chongqing, China
- Key Laboratory of High Altitude Medicine, 2Third Military Medical University, Ministry of Education, Chongqing, China
- PLA, Ministry of Education, Chongqing, China
| | - Si-Min Zhou
- Department of High Altitude Military Hygiene, College of High Altitude Military Medicine, Third Military Medical University, Chongqing, China
- Key Laboratory of High Altitude Medicine, 2Third Military Medical University, Ministry of Education, Chongqing, China
- PLA, Ministry of Education, Chongqing, China
| | - Chao Yuan
- Key Laboratory of High Altitude Medicine, 2Third Military Medical University, Ministry of Education, Chongqing, China
- PLA, Ministry of Education, Chongqing, China
- Department of Military Medical Geography, College of High Altitude Military Medicine, Third Military Medical University, Chongqing, China
| | - Huai-Jun Tian
- Department of High Altitude Military Hygiene, College of High Altitude Military Medicine, Third Military Medical University, Chongqing, China
- Key Laboratory of High Altitude Medicine, 2Third Military Medical University, Ministry of Education, Chongqing, China
- PLA, Ministry of Education, Chongqing, China
| | - Peng Li
- Department of High Altitude Military Hygiene, College of High Altitude Military Medicine, Third Military Medical University, Chongqing, China
- Key Laboratory of High Altitude Medicine, 2Third Military Medical University, Ministry of Education, Chongqing, China
- PLA, Ministry of Education, Chongqing, China
| | - Yu-Qi Gao
- Key Laboratory of High Altitude Medicine, 2Third Military Medical University, Ministry of Education, Chongqing, China
- PLA, Ministry of Education, Chongqing, China
- Department of Pathophysiology and High Altitude Physiology, College of High Altitude Military Medicine, Third Military Medical University, Chongqing, China
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Abstract
During dynamic exercise, the healthy pulmonary system faces several major challenges, including decreases in mixed venous oxygen content and increases in mixed venous carbon dioxide. As such, the ventilatory demand is increased, while the rising cardiac output means that blood will have considerably less time in the pulmonary capillaries to accomplish gas exchange. Blood gas homeostasis must be accomplished by precise regulation of alveolar ventilation via medullary neural networks and sensory reflex mechanisms. It is equally important that cardiovascular and pulmonary system responses to exercise be precisely matched to the increase in metabolic requirements, and that the substantial gas transport needs of both respiratory and locomotor muscles be considered. Our article addresses each of these topics with emphasis on the healthy, young adult exercising in normoxia. We review recent evidence concerning how exercise hyperpnea influences sympathetic vasoconstrictor outflow and the effect this might have on the ability to perform muscular work. We also review sex-based differences in lung mechanics.
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Affiliation(s)
- Andrew William Sheel
- The School of Kinesiology, The University of British Columbia, Vancouver, Canada.
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Singh M, Tulsawani R, Koganti P, Chauhan A, Manickam M, Misra K. Cordyceps sinensis increases hypoxia tolerance by inducing heme oxygenase-1 and metallothionein via Nrf2 activation in human lung epithelial cells. BIOMED RESEARCH INTERNATIONAL 2013; 2013:569206. [PMID: 24063008 PMCID: PMC3770031 DOI: 10.1155/2013/569206] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/18/2013] [Revised: 07/11/2013] [Accepted: 07/11/2013] [Indexed: 12/30/2022]
Abstract
Cordyceps sinensis, an edible mushroom growing in Himalayan regions, is widely recognized in traditional system of medicine. In the present study, we report the efficacy of Cordyceps sinensis in facilitating tolerance to hypoxia using A549 cell line as a model system. Treatment with aqueous extract of Cordyceps sinensis appreciably attenuated hypoxia induced ROS generation, oxidation of lipids and proteins and maintained antioxidant status similar to that of controls via induction of antioxidant gene HO1 (heme oxygenase-1), MT (metallothionein) and Nrf2 (nuclear factor erythroid-derived 2-like 2). In contrast, lower level of NF κ B (nuclear factor kappaB) and tumor necrosis factor- α observed which might be due to higher levels of HO1, MT and transforming growth factor- β . Further, increase in HIF1 (hypoxia inducible factor-1) and its regulated genes; erythropoietin, vascular endothelial growth factor, and glucose transporter-1 was observed. Interestingly, Cordyceps sinensis treatment under normoxia did not regulate the expression HIF1, NF κ B and their regulated genes evidencing that Cordyceps sinensis per se did not have an effect on these transcription factors. Overall, Cordyceps sinensis treatment inhibited hypoxia induced oxidative stress by maintaining higher cellular Nrf2, HIF1 and lowering NF κ B levels. These findings provide a basis for possible use of Cordyceps sinensis in tolerating hypoxia.
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Affiliation(s)
- Mrinalini Singh
- Defence Institute of Physiology and Allied Science, Lucknow Road, Timarpur, Delhi 110 054, India
| | - Rajkumar Tulsawani
- Defence Institute of Physiology and Allied Science, Lucknow Road, Timarpur, Delhi 110 054, India
| | - Praveen Koganti
- Defence Institute of Physiology and Allied Science, Lucknow Road, Timarpur, Delhi 110 054, India
| | - Amitabh Chauhan
- Defence Institute of Physiology and Allied Science, Lucknow Road, Timarpur, Delhi 110 054, India
| | - Manimaran Manickam
- Defence Institute of Physiology and Allied Science, Lucknow Road, Timarpur, Delhi 110 054, India
| | - Kshipra Misra
- Defence Institute of Physiology and Allied Science, Lucknow Road, Timarpur, Delhi 110 054, India
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33
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Little BB, Malina RM, Pena Reyes ME, Bali Chavez G. Altitude effects on growth of indigenous children in Oaxaca, Southern Mexico. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2013; 152:1-10. [PMID: 23900786 DOI: 10.1002/ajpa.22326] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Revised: 04/10/2013] [Accepted: 06/05/2013] [Indexed: 11/09/2022]
Abstract
The effect of altitude of residence on the growth status of 11,454 indigenous school children 6-14 years of age in Oaxaca, southern Mexico, was examined. Indicators of living conditions (human development index [HDI], index of community nutritional risk [INR], index of marginalization [IM], index of relative isolation [II]) were regressed on z-scores for height, weight and BMI, and the residuals were regressed on altitude of residence (km). Independent of other environmental conditions, altitude negatively affected height by approximately -0.07 z-scores per kilometer altitude above sea level. The estimated average decrease in stature was 0.92 cm per kilometer elevation. BMI was significantly increased, 1.2 units per kilometer elevation, consistent with earlier studies of growth status and altitude. In contrast, weight was not affected by altitude of residence. Approximately 36% of the reduction in height and 54% of the increase in BMI were due to altitude effects; the remaining changes in height and BMI were associated with environmental factors reflected in the indices of community well-being considered.
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Affiliation(s)
- Bertis B Little
- Departments of Mathematics, Physics, and Engineering, and Division of Academic Affairs, Tarleton State University, Stephenville, TX
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34
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An insight into the changes in human plasma proteome on adaptation to hypobaric hypoxia. PLoS One 2013; 8:e67548. [PMID: 23844025 PMCID: PMC3699623 DOI: 10.1371/journal.pone.0067548] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Accepted: 05/20/2013] [Indexed: 12/19/2022] Open
Abstract
Adaptation to hypobaric hypoxia is required by animals and human in several physiological and pathological situations. Hypobaric hypoxia is a pathophysiological condition triggering redox status disturbances of cell organization leading, via oxidative stress, to proteins, lipids, and DNA damage. Identifying the molecular variables playing key roles in this process would be of paramount importance to shed light on the mechanisms known to counteract the negative effects of oxygen lack. To obtain a molecular signature, changes in the plasma proteome were studied by using proteomic approach. To enrich the low-abundance proteins in human plasma, two highly abundant proteins, albumin and IgG, were first removed. By comparing the plasma proteins of high altitude natives with those of a normal control group, several proteins with a significant alteration were found. The up-regulated proteins were identified as vitamin D-binding protein, hemopexin, alpha-1-antitrypsin, haptoglobin β-chain, apolipoprotein A1, transthyretin and hemoglobin beta chain. The down-regulated proteins were transferrin, complement C3, serum amyloid, complement component 4A and plasma retinol binding protein. Among these proteins, the alterations of transthyretin and transferrin were further confirmed by ELISA and Western blotting analysis. Since all the up- and down- regulated proteins identified above are well-known inflammation inhibitors and play a positive anti-inflammatory role, these results show that there is some adaptive mechanism that sustains the inflammation balance in high altitude natives exposed to hypobaric hypoxia.
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35
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Little MA, Thomas RB, Garruto RM. A Half Century of High-Altitude Studies in Anthropology: Introduction to the Plenary Session. Am J Hum Biol 2013; 25:148-50. [DOI: 10.1002/ajhb.22356] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2012] [Accepted: 11/19/2012] [Indexed: 11/10/2022] Open
Affiliation(s)
- Michael A. Little
- Department of Anthropology; Binghamton University; State University of New York, Binghamton, NY
| | - R. Brooke Thomas
- Department of Anthropology; University of Massachusetts; Amherst, MA
| | - Ralph M. Garruto
- Department of Anthropology; Binghamton University; State University of New York, Binghamton, NY
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36
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Frisancho AR. Developmental Functional Adaptation to High Altitude: Review. Am J Hum Biol 2013. [DOI: 10.1002/jhb.22367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Affiliation(s)
- A. Roberto Frisancho
- Department of Anthropology and Center for Human Growth and Development; University of Michigan; Ann Arbor; Michigan; 48109-1092
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37
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Beall CM. Human adaptability studies at high altitude: Research designs and major concepts during fifty years of discovery. Am J Hum Biol 2013; 25:141-7. [DOI: 10.1002/ajhb.22355] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2012] [Accepted: 11/19/2012] [Indexed: 11/08/2022] Open
Affiliation(s)
- Cynthia M. Beall
- Department of Anthropology; Case Western Reserve University; Cleveland; Ohio; 44106-7125
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38
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Moderate altitude is not associated with adverse postoperative outcomes for patients undergoing bidirectional cavopulmonary anastomosis and Fontan operation: a comparative study among Denver, Edmonton, and Toronto. J Thorac Cardiovasc Surg 2013; 146:1165-71. [PMID: 23353110 DOI: 10.1016/j.jtcvs.2012.12.073] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2012] [Revised: 11/25/2012] [Accepted: 12/18/2012] [Indexed: 11/23/2022]
Abstract
OBJECTIVE Outcomes of patients with single ventricle physiology undergoing cavopulmonary palliations depend on pulmonary vascular resistance (PVR) and have been suggested to be adversely affected by living at elevated altitude. We compared the pulmonary hemodynamic data in correlation with postoperative outcomes at the 3 centers of Denver, Edmonton, and Toronto at altitudes of 1604, 668, and 103 meters, respectively. METHODS Hemodynamic data at pre-bidirectional cavopulmonary anastomosis (BCPA) and pre-Fontan catheterization between 1995 and 2007 were collected. Death from cardiac failure or heart transplantation in the same period was used to define palliation failure. RESULTS There was no significant correlation between altitude (ranged from 1 to 2572 meters) and PVR, pulmonary artery pressure (PAP) or transpulmonary gradient (TPG) at pre-BCPA and pre-Fontan catheterization. BCPA failure occurred in 11 (9.2%) patients in Denver, 3 (2.9%) in Edmonton, and 34 (11.9%) in Toronto. Fontan failure occurred in 3 (6.1%) patients in Denver, 5 (7.2%) in Edmonton, and 11 (7.0%) in Toronto. There was no significant difference in BCPA and Fontan failure among the 3 centers. BCPA failure positively correlated with PVR and the presence of a right ventricle as the systemic ventricle. Fontan failure positively correlated with PAP and TPG. CONCLUSIONS Moderate altitude is not associated with an increased PVR or adverse outcomes in patients with a functional single ventricle undergoing BCPA and the Fontan operation. The risk factors for palliation failure are higher PVR, PAP, and TPG and a systemic right ventricle, but not altitude. Our study reemphasizes the importance of cardiac catheterization assessments of pulmonary hemodynamics before BCPA and Fontan operations.
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39
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Halsey LG, Stroud MA. 100 Years Since Scott Reached the Pole: A Century of Learning About the Physiological Demands of Antarctica. Physiol Rev 2012; 92:521-36. [DOI: 10.1152/physrev.00031.2011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The 1910–1913 Terra Nova Expedition to the Antarctic, led by Captain Robert Falcon Scott, was a venture of science and discovery. It is also a well-known story of heroism and tragedy since his quest to reach the South Pole and conduct research en route, while successful was also fateful. Although Scott and his four companions hauled their sledges to the Pole, they died on their return journey either directly or indirectly from the extreme physiological stresses they experienced. One hundred years on, our understanding of such stresses caused by Antarctic extremes and how the body reacts to severe exercise, malnutrition, hypothermia, high altitude, and sleep deprivation has greatly advanced. On the centenary of Scott's expedition to the bottom of the Earth, there is still controversy surrounding whether the deaths of those five men could have, or should have, been avoided. This paper reviews present-day knowledge related to the physiology of sustained man-hauling in Antarctica and contrasts this with the comparative ignorance about these issues around the turn of the 20th century. It closes by considering whether, with modern understanding about the effects of such a scenario on the human condition, Scott could have prepared and managed his team differently and so survived the epic 1,600-mile journey. The conclusion is that by carrying rations with a different composition of macromolecules, enabling greater calorific intake at similar overall weight, Scott might have secured the lives of some of the party, and it is also possible that enhanced levels of vitamin C in his rations, albeit difficult to achieve in 1911, could have significantly improved their survival chances. Nevertheless, even with today's knowledge, a repeat attempt at his expedition would by no means be bound to succeed.
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Affiliation(s)
- Lewis G. Halsey
- University of Roehampton, London, and National Institute for Health Research Biomedical Research Unit in Nutrition, Southampton University Hospitals Trust, Southampton, United Kingdom
| | - Mike A. Stroud
- University of Roehampton, London, and National Institute for Health Research Biomedical Research Unit in Nutrition, Southampton University Hospitals Trust, Southampton, United Kingdom
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40
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Weinberg I, Borohovitz A, Krichevsky S, Perlman R, Ben-Yehuda A, Ben-Yehuda D. Janus Kinase V617F mutation in cigarette smokers. Am J Hematol 2012; 87:5-8. [PMID: 21953826 DOI: 10.1002/ajh.22180] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2011] [Accepted: 08/28/2011] [Indexed: 01/30/2023]
Abstract
The JAK2 V617F mutation is responsible for the constitutive activation of the erythropoietin receptor signaling pathway in most cases of polycythemia vera (PV). The mutation has also been described in healthy people. As smoking may result in secondary polycythemia, the goal of this trial was to examine the effect of smoking on the prevalence of the JAK2 mutation and its correlation to erythrocytosis. The study was case-control. Hospitalized smokers (n = 81) and nonsmokers (n = 61) were recruited. Serum was drawn for complete blood count, erythropoietin, ferritin and venous blood gases. JAK2 mutation was analyzed by highly sensitive allele-specific Quantitative Real Time PCR. The JAK2 mutation was found in 29/81 (35.8%) of smokers in comparison to only 9/61 (14.8%) of the control group (P = 0.007). The frequency of the mutation among smokers who were positive for the JAK2 mutation had a mean of 6.78 × 10(-4) ± 1.08 × 10(-3) vs. 1.51 × 10(-4) ± 2.04 × 10(-4) among nonsmokers (P = 0.027). Both frequencies are much lower than those found in PV. There was a medium correlation between older age and mutation frequency in nonsmokers (r= 0.67, P = 0.043). Hematocrit was higher in smokers (47.8 ± 6 vs. 41.7 ± 4.7, P < 0.0001), but no correlation was found to JAK2 mutation. In a cohort of hospitalized smokers and nonsmokers, JAK2 mutation was more prevalent and found in higher frequencies among smokers than nonsmokers. We suggest that accelerated erythropoiesis renders the cells susceptible to JAK2 mutation.
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Affiliation(s)
- Ido Weinberg
- Internal Medicine Division, Hadassah Hebrew University Medical Center, Jerusalem, Israel.
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41
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Yan X, Zhang J, Gong Q, Weng X. Cerebrovascular reactivity among native-raised high altitude residents: an fMRI study. BMC Neurosci 2011; 12:94. [PMID: 21943208 PMCID: PMC3213017 DOI: 10.1186/1471-2202-12-94] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2011] [Accepted: 09/26/2011] [Indexed: 12/02/2022] Open
Abstract
Background The impact of long term residence on high altitude (HA) on human brain has raised concern among researchers in recent years. This study investigated the cerebrovascular reactivity among native-born high altitude (HA) residents as compared to native sea level (SL) residents. The two groups were matched on the ancestral line, ages, gender ratios, and education levels. A visual cue guided maximum inspiration task with brief breath holding was performed by all the subjects while Blood-Oxygenation-Level-Dependent (BOLD) functional Magnetic Resonance Imaging (fMRI) data were acquired from them. Results Compared to SL controls, the HA group showed generally decreased cerebrovascular reactivity and longer delay in hemodynamic response. Clusters showing significant differences in the former aspect were located at the bilateral primary motor cortex, the right somatosensory association cortex, the right thalamus and the right caudate, the bilateral precuneus, the right cingulate gyrus and the right posterior cingulate cortex, as well as the left fusiform gyrus and the right lingual cortex; clusters showing significant differences in the latter aspect were located at the precuneus, the insula, the superior frontal and temporal gyrus, the somatosensory cortex (the postcentral gyrus) and the cerebellar tonsil. Inspiratory reserve volume (IRV), which is an important aspect of pulmonary function, demonstrated significant correlation with the amount of BOLD signal change in multiple brain regions, particularly at the bilateral insula among the HA group. Conclusions Native-born HA residents generally showed reduced cerebrovascular reactivity as demonstrated in the hemodynamic response during a visual cue guided maximum inspiration task conducted with BOLD-fMRI. This effect was particularly manifested among brain regions that are typically involved in cerebral modulation of respiration.
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Affiliation(s)
- Xiaodan Yan
- Laboratory for Higher Brain Function, Institute of Psychology, Chinese Academy of Sciences, Beijing, China.
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Wu YC, Wang YJ, Tseng GF. Ascorbic acid and α-tocopherol supplement starting prenatally enhances the resistance of nucleus tractus solitarius neurons to hypobaric hypoxic challenge. Brain Struct Funct 2011; 216:105-22. [PMID: 21287201 DOI: 10.1007/s00429-010-0300-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2010] [Accepted: 12/30/2010] [Indexed: 12/15/2022]
Abstract
Hypobaric hypoxia, encountered at high altitude, could result in severe consequences. Ascorbic acid (AA) and α-tocopherol (αTC), the two readily available over-the-counter antioxidants, are known to protect nervous tissue against oxidative stress. Here we study whether AA or αTC supplement starting prenatally protects animals against hypobaric hypoxic challenge at adulthood. Expressions of c-fos and the NR1 subunit of the N-methyl-D-aspartate receptors in the nucleus tractus solitarius (NTS) subserving cardiorespiratory functions were investigated. AA and αTC supplement reduced the number of c-fos immunoreactive neurons and intensity of NR1 expression in young and adult animals under normoxia. The treatment, in addition, attenuated the activation of NTS neurons, in terms of c-fos and NR1 expressions, and reduced the anxiety behaviors of adult rats subjected to hypobaric hypoxic challenge. Reduction of c-fos immunoreactive neurons was found concentrated in the chemoreceptor, baroreceptor, and tracheobronchial tree NTS subnuclei that receive corresponding afferents. The protective effect was not found in normal adult animals supplemented with AA or αTC a week before hypobaric hypoxic challenge. In short, prenatal and sustained AA or αTC supplement altered NTS substrate and ameliorated animals' reactions to hypobaric hypoxic insult, suggesting that this may be considered to protect animals from hypoxic insults from young to adult.
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Affiliation(s)
- Ya-Chieh Wu
- Institute of Anatomy and Cell Biology, College of Medicine, National Taiwan University, No. 1, Section 1, Jen-Ai Road, Taipei, Taiwan
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44
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Zhang J, Yan X, Shi J, Gong Q, Weng X, Liu Y. Structural modifications of the brain in acclimatization to high-altitude. PLoS One 2010; 5:e11449. [PMID: 20625426 PMCID: PMC2897842 DOI: 10.1371/journal.pone.0011449] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2010] [Accepted: 06/11/2010] [Indexed: 12/30/2022] Open
Abstract
Adaptive changes in respiratory and cardiovascular responses at high altitude (HA) have been well clarified. However, the central mechanisms underlying HA acclimatization remain unclear. Using voxel-based morphometry (VBM) and diffusion tensor imaging (DTI) with fractional anisotropy (FA) calculation, we investigated 28 Han immigrant residents (17–22 yr) born and raised at HA of 2616–4200 m in Qinghai-Tibetan Plateau for at least 17 years and who currently attended college at sea-level (SL). Their family migrated from SL to HA 2–3 generations ago and has resided at HA ever since. Control subjects were matched SL residents. HA residents (vs. SL) showed decreased grey matter volume in the bilateral anterior insula, right anterior cingulate cortex, bilateral prefrontal cortex, left precentral cortex, and right lingual cortex. HA residents (vs. SL) had significantly higher FA mainly in the bilateral anterior limb of internal capsule, bilateral superior and inferior longitudinal fasciculus, corpus callosum, bilateral superior corona radiata, bilateral anterior external capsule, right posterior cingulum, and right corticospinal tract. Higher FA values in those regions were associated with decreased or unchanged radial diffusivity coinciding with no change of longitudinal diffusivity in HA vs. SL group. Conversely, HA residents had lower FA in the left optic radiation and left superior longitudinal fasciculus. Our data demonstrates that HA acclimatization is associated with brain structural modifications, including the loss of regional cortical grey matter accompanied by changes in the white matter, which may underlie the physiological adaptation of residents at HA.
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Affiliation(s)
- Jiaxing Zhang
- Laboratory for Higher Brain Function, Institute of Psychology, Chinese Academy of Sciences, Beijing, China.
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45
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Yan X, Zhang J, Shi J, Gong Q, Weng X. Cerebral and functional adaptation with chronic hypoxia exposure: a multi-modal MRI study. Brain Res 2010; 1348:21-9. [PMID: 20599837 DOI: 10.1016/j.brainres.2010.06.024] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2010] [Revised: 05/25/2010] [Accepted: 06/09/2010] [Indexed: 11/30/2022]
Abstract
The current study obtained multi-modal MRI data from 28 immigrant high altitude (HA) young adults who were born and grew up at Qinghai-Tibetan plateau matched with 28 matched sea level (SL) controls. We compared their regional gray matter volumes (VBM) and white matter quality (DAI FA values) as well as resting state brain activity (Regional Homogeneity (ReHo) of BOLD-fMRI). We found that HA residents showed decreased gray matter volume at bilateral anterior insula, bilateral prefrontal cortex, the left precentral, the left cingulate and the right lingual cortex; accompanied by changed FA and ReHo values in relevant and other regions. The resting state activity at the hippocampus and the right insula were increasing with SL relocation. The HA subjects performed worse on a series of working memory tasks, with the ReHo values of several regions as significant predictors of their performance. This study demonstrated the cerebral and functional modifications with chronic high altitude hypoxia.
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Affiliation(s)
- Xiaodan Yan
- Laboratory for Higher Brain Function, Institute of Psychology, Chinese Academy of Sciences, Beijing 100101, China
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46
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Vivanco P, Rol MÁ, Madrid JA. TEMPERATURE CYCLES TRIGGER NOCTURNALISM IN THE DIURNAL HOMEOTHERMOCTODON DEGUS. Chronobiol Int 2010; 27:517-34. [DOI: 10.3109/07420521003743660] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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47
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Weinstein RS, Haas JD. Part two: Early stress and later reproductive performance under conditions of malnutrition and high altitude hypoxia. Med Anthropol 2010. [DOI: 10.1080/01459740.1977.9965815] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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48
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Mueller WH, Chakraborty R, Barton SA, Rothhammer F, Schull WJ. Part IV: Genes and epidemiology in anthropological adaptation studies: Familial correlations in lung function in populations residing at different altitudes in Chile. Med Anthropol 2010. [DOI: 10.1080/01459740.1980.9965876] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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49
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The significance of genome-wide transcriptional regulation in the evolution of stress tolerance. Evol Ecol 2010. [DOI: 10.1007/s10682-009-9345-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Abstract
High altitude problems like hypoxia, acute mountain sickness, high altitude cerebral edema, pulmonary edema, insomnia, tiredness, lethargy, lack of appetite, body pain, dementia, and depression may occur when a person or a soldier residing in a lower altitude ascends to high-altitude areas. These problems arise due to low atmospheric pressure, severe cold, high intensity of solar radiation, high wind velocity, and very high fluctuation of day and night temperatures in these regions. These problems may escalate rapidly and may sometimes become life-threatening. Shilajit is a herbomineral drug which is pale-brown to blackish-brown, is composed of a gummy exudate that oozes from the rocks of the Himalayas in the summer months. It contains humus, organic plant materials, and fulvic acid as the main carrier molecules. It actively takes part in the transportation of nutrients into deep tissues and helps to overcome tiredness, lethargy, and chronic fatigue. Shilajit improves the ability to handle high altitudinal stresses and stimulates the immune system. Thus, Shilajit can be given as a supplement to people ascending to high-altitude areas so that it can act as a "health rejuvenator" and help to overcome high-altitude related problems.
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Affiliation(s)
- Harsahay Meena
- Herbal Medicine Division, Defence Research and Development Organization, DIBER, Field Station, Pithoragarh - 262 501, Uttarakhand, India
| | - H. K. Pandey
- Herbal Medicine Division, Defence Research and Development Organization, DIBER, Field Station, Pithoragarh - 262 501, Uttarakhand, India
| | - M. C. Arya
- Herbal Medicine Division, Defence Research and Development Organization, DIBER, Field Station, Pithoragarh - 262 501, Uttarakhand, India
| | - Zakwan Ahmed
- Herbal Medicine Division, Defence Research and Development Organization, DIBER, Field Station, Pithoragarh - 262 501, Uttarakhand, India
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