1
|
Wang XP, Yan D, Jin XP, Zhang WY, Shi T, Wang X, Song W, Xiong X, Guo D, Chen S. The role of amino acid metabolism alterations in acute ischemic stroke: From mechanism to application. Pharmacol Res 2024; 207:107313. [PMID: 39025169 DOI: 10.1016/j.phrs.2024.107313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2024] [Revised: 07/10/2024] [Accepted: 07/15/2024] [Indexed: 07/20/2024]
Abstract
Acute ischemic stroke (AIS) is the most prevalent type of stroke, and due to its high incidence, disability rate, and mortality rate, it imposes a significant burden on the health care system. Amino acids constitute one of the most crucial metabolic products within the human body, and alterations in their metabolic pathways have been identified in the microenvironment of AIS, thereby influencing the pathogenesis, severity, and prognosis of AIS. The amino acid metabolism characteristics in AIS are complex. On one hand, the dynamic progression of AIS continuously reshapes the amino acid metabolism pattern. Conversely, changes in the amino acid metabolism pattern also exert a double-edged effect on AIS. This interaction is bidirectional, dynamic, heterogeneous, and dose-specific. Therefore, the distinctive metabolic reprogramming features surrounding amino acids during the AIS process are systematically summarized in this paper, aiming to provide potential investigative strategies for the early diagnosis, treatment approaches, and prognostic enhancement of AIS.
Collapse
Affiliation(s)
- Xiang-Ping Wang
- First People's Hospital of Linping District; Linping Campus, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 311100, China.
| | - Dan Yan
- Affiliated Xiaoshan Hospital, Hangzhou Normal University, Hangzhou 311202, China.
| | - Xia-Ping Jin
- First People's Hospital of Linping District; Linping Campus, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 311100, China.
| | - Wen-Yan Zhang
- First People's Hospital of Linping District; Linping Campus, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 311100, China.
| | - Tao Shi
- First People's Hospital of Linping District; Linping Campus, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 311100, China.
| | - Xiang Wang
- First People's Hospital of Linping District; Linping Campus, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 311100, China.
| | - Wenjuan Song
- First People's Hospital of Linping District; Linping Campus, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, 311100, China.
| | - Xing Xiong
- Traditional Chinese Medical Hospital of Xiaoshan,The Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou 311200, Zhejiang Province, China.
| | - Duancheng Guo
- Cancer Institute, Fudan University Shanghai Cancer Center; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai 200032, China.
| | - Sheng Chen
- First People's Hospital of Xiaoshan District,Hangzhou 311200, Zhejiang Province, China.
| |
Collapse
|
2
|
Zhao L, Ma D, Wang L, Su X, Feng L, Zhu L, Chen Y, Hao Y, Wang X, Feng J. Metabolic changes with the occurrence of atherosclerotic plaques and the effects of statins. Front Immunol 2023; 14:1301051. [PMID: 38143759 PMCID: PMC10739339 DOI: 10.3389/fimmu.2023.1301051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Accepted: 11/23/2023] [Indexed: 12/26/2023] Open
Abstract
Atherosclerosis is a common cardiovascular disease caused by the abnormal expression of multiple factors and genes influenced by both environmental and genetic factors. The primary manifestation of atherosclerosis is plaque formation, which occurs when inflammatory cells consume excess lipids, affecting their retention and modification within the arterial intima. This triggers endothelial cell (EC) activation, immune cell infiltration, vascular smooth muscle cell (VSMC) proliferation and migration, foam cell formation, lipid streaks, and fibrous plaque development. These processes can lead to vascular wall sclerosis, lumen stenosis, and thrombosis. Immune cells, ECs, and VSMCs in atherosclerotic plaques undergo significant metabolic changes and inflammatory responses. The interaction of cytokines and chemokines secreted by these cells leads to the onset, progression, and regression of atherosclerosis. The regulation of cell- or cytokine-based immune responses is a novel therapeutic approach for atherosclerosis. Statins are currently the primary pharmacological agents utilised for managing unstable plaques owing to their ability to enhance endothelial function, regulate VSMC proliferation and apoptosis by reducing cholesterol levels, and mitigate the expression and activity of inflammatory cytokines. In this review, we provide an overview of the metabolic changes associated with atherosclerosis, describe the effects of inflammatory responses on atherosclerotic plaques, and discuss the mechanisms through which statins contribute to plaque stabilisation. Additionally, we examine the role of statins in combination with other drugs in the management of atherosclerosis.
Collapse
Affiliation(s)
| | - Di Ma
- Bethune First Hospital, Jilin University, Changchun, China
| | - LiJuan Wang
- Bethune First Hospital, Jilin University, Changchun, China
| | | | | | | | | | | | | | | |
Collapse
|
3
|
Zhu Y, Wang J, Yao L, Huang Y, Yang H, Yu X, Chen X, Chen Y. Electroacupuncture at BL15 attenuates chronic fatigue syndrome by downregulating iNOS/NO signaling in C57BL/6 mice. Anat Rec (Hoboken) 2023; 306:3073-3084. [PMID: 35608198 DOI: 10.1002/ar.24953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 03/19/2022] [Accepted: 04/22/2022] [Indexed: 11/11/2022]
Abstract
Chronic fatigue syndrome (CFS) has a high incidence due to the increased pressure of daily life and work in modern society. Our previous clinical studies have found the effects of electroacupuncture (EA) on CFS patients, however, the mechanism of EA on CFS is still unknown. In this study, we investigated the effects of EA on cardiac function in a CFS mouse model to explore its underlying mechanism. The mice were randomly divided into three groups: control, CFS, and CFS mice receiving EA (CFS + EA). After behavioral assessments and echocardiographic measurement, blood and heart tissue of the mice were collected for biochemical tests, and then we evaluated the effects of EA on the CFS mouse model when nitric oxide (NO) levels were enhanced by l-arginine. The results showed that EA ameliorated the injured motor and cardiac function. Meanwhile, EA also inhibited increased expression of inducible nitric oxide synthase (iNOS) at heart tissue and the serum NO levels in mice subjected to sustained forced swimming stress. Furthermore, the NO level in serum increased with l-arginine administration, which blocked the effects of EA on CFS mice. This study suggested that EA could improve the motor function and cardiac function in CFS mice and its effects may be associated with the down-regulation of iNOS/NO signaling.
Collapse
Affiliation(s)
- Yang Zhu
- The First Clinical Medical College, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Jingya Wang
- South China Research Center for Acupuncture and Moxibustion, Medical College of Acu-Moxi and Rehabilitation, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Lin Yao
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yunxuan Huang
- The First Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Haitao Yang
- The First Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xiaojiang Yu
- The First Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xinghua Chen
- The First Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yongjun Chen
- South China Research Center for Acupuncture and Moxibustion, Medical College of Acu-Moxi and Rehabilitation, Guangzhou University of Chinese Medicine, Guangzhou, China
- Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired Intelligence, Guangzhou, China
| |
Collapse
|
4
|
Zhang MQ, Wang CC, Pang XB, Shi JZ, Li HR, Xie XM, Wang Z, Zhang HD, Zhou YF, Chen JW, Han ZY, Zhao LL, He YY. Role of macrophages in pulmonary arterial hypertension. Front Immunol 2023; 14:1152881. [PMID: 37153557 PMCID: PMC10154553 DOI: 10.3389/fimmu.2023.1152881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Accepted: 03/27/2023] [Indexed: 05/09/2023] Open
Abstract
Pulmonary arterial hypertension (PAH) is a severe cardiopulmonary vascular disease characterized by progressive pulmonary artery pressure elevation, increased pulmonary vascular resistance and ultimately right heart failure. Studies have demonstrated the involvement of multiple immune cells in the development of PAH in patients with PAH and in experimental PAH. Among them, macrophages, as the predominant inflammatory cells infiltrating around PAH lesions, play a crucial role in exacerbating pulmonary vascular remodeling in PAH. Macrophages are generally polarized into (classic) M1 and (alternative) M2 phenotypes, they accelerate the process of PAH by secreting various chemokines and growth factors (CX3CR1, PDGF). In this review we summarize the mechanisms of immune cell action in PAH, as well as the key factors that regulate the polarization of macrophages in different directions and their functional changes after polarization. We also summarize the effects of different microenvironments on macrophages in PAH. The insight into the interactions between macrophages and other cells, chemokines and growth factors may provide important clues for the development of new, safe and effective immune-targeted therapies for PAH.
Collapse
Affiliation(s)
- Meng-Qi Zhang
- School of Pharmacy, Henan University, Kaifeng, Henan, China
| | - Chen-Chen Wang
- School of Pharmacy, Henan University, Kaifeng, Henan, China
| | - Xiao-Bin Pang
- School of Pharmacy, Henan University, Kaifeng, Henan, China
| | - Jun-Zhuo Shi
- School of Pharmacy, Henan University, Kaifeng, Henan, China
| | - Hao-Ran Li
- School of Pharmacy, Henan University, Kaifeng, Henan, China
| | - Xin-Mei Xie
- School of Pharmacy, Henan University, Kaifeng, Henan, China
| | - Zhe Wang
- School of Pharmacy, Henan University, Kaifeng, Henan, China
| | - Hong-Da Zhang
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Yun-Feng Zhou
- School of Pharmacy, Henan University, Kaifeng, Henan, China
| | - Ji-Wang Chen
- Department of Medicine, University of Illinois at Chicago, Chicago, IL, United States
| | - Zhi-Yan Han
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
- *Correspondence: Yang-Yang He, ; Lu-Ling Zhao, ; Zhi-Yan Han,
| | - Lu-Ling Zhao
- School of Pharmacy, Henan University, Kaifeng, Henan, China
- *Correspondence: Yang-Yang He, ; Lu-Ling Zhao, ; Zhi-Yan Han,
| | - Yang-Yang He
- School of Pharmacy, Henan University, Kaifeng, Henan, China
- *Correspondence: Yang-Yang He, ; Lu-Ling Zhao, ; Zhi-Yan Han,
| |
Collapse
|
5
|
Wooten SV, Wolf JS, Mendoza D, Bartholomew JB, Stanforth PR, Stanforth D, Tanaka H, Fleming RYD. The Impact of a Multimodal Sport Science-Based Prehabilitation Program on Clinical Outcomes in Abdominal Cancer Patients: A Cohort Study. Am Surg 2022; 88:2302-2308. [PMID: 35608376 DOI: 10.1177/00031348221103657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND The potential for prehabilitation programs to impact clinical outcomes is uncertain in abdominal cancer patients due to the short window of time to intervene and the weakened state of the patients. To improve the effectiveness of prehabilitation intervention, a multimodal sports science approach was implemented. METHODS Prior to cancer-related surgery, 21 patients participated in a 4-week exercise and nutrition prehabilitation program comprised of blood flow restriction exercise (BFR) and a sports nutrition supplement. Retrospective data of 71 abdominal cancer patients who underwent usual preoperative care was used as a comparator control group (CON). At 90 days post-surgery, clinical outcomes were quantified. RESULTS Prehabilitation was associated with a shorter length of hospital stay (P = .02) with 5.5 fewer days (4.7 ± 2.1 vs 10.2 ± 1.2 days in CON) and decreased incidence of any complications (P = .03). Prehabilitation was not related to incidence of serious complications (P = .17) or readmission rate (P = .59). The prehabilitation group recorded 58% more steps on day 5 after surgery (P = .043). DISCUSSION A 4-week home-based prehabilitation program composed of BFR training and sports nutrition supplementation was effective in reducing postoperative complications and length of hospital stay in older patients with abdominal cancer.ClinicalTrials.gov Identifier: NCT04073381.
Collapse
Affiliation(s)
- Savannah V Wooten
- Department of Kinesiology and Health Education, 4002The University of Texas at Austin, Austin, TX, USA
| | - J Stuart Wolf
- Department of Surgery and Periopertative Care, 12330The University of Texas at Austin, Austin, TX, USA
| | - Diana Mendoza
- Department of Surgery and Periopertative Care, 12330The University of Texas at Austin, Austin, TX, USA
| | - John B Bartholomew
- Department of Kinesiology and Health Education, 4002The University of Texas at Austin, Austin, TX, USA
| | - Philip R Stanforth
- Department of Kinesiology and Health Education, 4002The University of Texas at Austin, Austin, TX, USA
| | - Dixie Stanforth
- Department of Kinesiology and Health Education, 4002The University of Texas at Austin, Austin, TX, USA
| | - Hirofumi Tanaka
- Department of Kinesiology and Health Education, 4002The University of Texas at Austin, Austin, TX, USA
| | - R Y Declan Fleming
- Department of Surgery and Periopertative Care, 12330The University of Texas at Austin, Austin, TX, USA
| |
Collapse
|
6
|
Wooten SV, Fleming RYD, Wolf JS, Stray-Gundersen S, Bartholomew JB, Mendoza D, Stanforth PR, Stanforth D, Hernandez LM, Tanaka H. Prehabilitation program composed of blood flow restriction training and sports nutrition improves physical functions in abdominal cancer patients awaiting surgery. Eur J Surg Oncol 2021; 47:2952-2958. [PMID: 34092455 DOI: 10.1016/j.ejso.2021.05.038] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 05/04/2021] [Accepted: 05/25/2021] [Indexed: 01/02/2023] Open
Abstract
INTRODUCTION The impact of prehabilitation remains controversial due to a short presurgical waiting period and the diminished capacity of the patient population. A strategy to augment and optimize the effectiveness of prehabilitations for abdominal cancer patients may be found in the unlikely field of sport science. We investigated the use of blood flow restriction training and sport nutrition supplementation to augment functional capacity and increase muscle strength in twenty-four abdominal cancer patients awaiting surgery. MATERIALS AND METHODS The sport science-based program was comprised of blood flow restriction exercise 5 to 6 times per week and a daily sports nutrition supplement containing l-citrulline, creatine monohydrate, and whey protein. RESULTS After 4 weeks of prehabilitation, 6-min walk test, timed up and go, short physical performance battery, 5-chair stand test and physical component score of quality of life were significantly improved (all p < 0.05). Total body and appendicular lean mass as assessed by dual energy X-ray absorptiometry increased by 0.73 ± 1.04 kg (p = 0.004) and 0.42 ± 0.64 kg (p = 0.006), respectively. Total body fat mass and trunk fat mass decreased (p = 0.004 and p = 0.021). There were no significant changes in hand grip strength, fear of falling, the mental component summary of quality of life, or fasting serum concentrations of myostatin, follistatin, and growth hormone. CONCLUSION A multimodal prehabilitation program, which encompasses blood flow restriction training and sports nutrition supplements, is both feasible and effective in improving lean mass and physical function in abdominal cancer patients prior to surgery.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | | | - Ladia M Hernandez
- Department of Nutritional Sciences, The University of Texas at Austin, Austin, TX, USA
| | | |
Collapse
|
7
|
Protection against Doxorubicin-Induced Cardiotoxicity through Modulating iNOS/ARG 2 Balance by Electroacupuncture at PC6. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:6628957. [PMID: 33824696 PMCID: PMC8007344 DOI: 10.1155/2021/6628957] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 02/24/2021] [Accepted: 02/28/2021] [Indexed: 12/16/2022]
Abstract
Background Doxorubicin (DOX) is a commonly used chemotherapeutic drug but is limited in clinical applications by its cardiotoxicity. Neiguan acupoint (PC6) is a well-recognized acupoint for the treatment of cardiothoracic disease. However, whether acupuncture at PC6 could be effective in preventing DOX-induced cardiotoxicity is still unknown. Methods A set of experiments were performed with myocardial cells, wild type, inducible nitric oxide synthase knockout (iNOS-/-), and myocardial-specific ablation arginase 2 (Myh6-ARG 2-/-) mice. We investigated the protective effect and the underlying mechanisms for electroacupuncture (EA) against DOX-induced cardiotoxicity by echocardiography, immunostaining, biochemical analysis, and molecular biotechnology in vivo and in vitro analysis. Results We found that DOX-mediated nitric oxide (NO) production was positively correlated with the iNOS level but has a negative correlation with the arginase 2 (ARG 2) level in both myocardial cells and tissues. Meanwhile, EA at PC6 alleviated cardiac dysfunction and cardiac hypertrophy in DOX-treated mice. EA at PC6 blocked the upregulation of NO production in accompanied with the downregulated iNOS and upregulated ARG 2 levels in myocardial tissue induced by DOX. Furthermore, knockout iNOS prevented cardiotoxicity and EA treatment did not cause the further improvement of cardiac function in iNOS-/- mice treated by DOX. In contrast, deficiency of myocardial ARG 2 aggravated DOX-induced cardiotoxicity and reduced EA protective effect. Conclusion These results suggest that EA treatment at PC6 can prevent DOX-induced cardiotoxicity through modulating NO production by modulating the iNOS/ARG 2 balance in myocardial cells.
Collapse
|
8
|
Lin X, Onda DA, Yang CH, Lewis JR, Levinger I, Loh K. Roles of bone-derived hormones in type 2 diabetes and cardiovascular pathophysiology. Mol Metab 2020; 40:101040. [PMID: 32544571 PMCID: PMC7348059 DOI: 10.1016/j.molmet.2020.101040] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 05/28/2020] [Accepted: 06/11/2020] [Indexed: 02/07/2023] Open
Abstract
Background Emerging evidence demonstrates that bone is an endocrine organ capable of influencing multiple physiological and pathological processes through the secretion of hormones. Recent research suggests complex crosstalk between the bone and other metabolic and cardiovascular tissues. It was uncovered that three of these bone-derived hormones—osteocalcin, lipocalin 2, and sclerostin—are involved in the endocrine regulations of cardiometabolic health and play vital roles in the pathophysiological process of developing cardiometabolic syndromes such as type 2 diabetes and cardiovascular disease. Chronic low-grade inflammation is one of the hallmarks of cardiometabolic diseases and a major contributor to disease progression. Novel evidence also implicates important roles of bone-derived hormones in the regulation of chronic inflammation. Scope of review In this review, we provide a detailed overview of the physiological and pathological roles of osteocalcin, lipocalin 2, and sclerostin in cardiometabolic health regulation and disease development, with a focus on the modulation of chronic inflammation. Major conclusions Evidence supports that osteocalcin has a protective role in cardiometabolic health, and an increase of lipocalin 2 contributes to the development of cardiometabolic diseases partly via pro-inflammatory effects. The roles of sclerostin appear to be complicated: It exerts pro-adiposity and pro-insulin resistance effects in type 2 diabetes and has an anti-calcification effect during cardiovascular disease. A better understanding of the actions of these bone-derived hormones in the pathophysiology of cardiometabolic diseases will provide crucial insights to help further research develop new therapeutic strategies to treat these diseases.
Collapse
Affiliation(s)
- Xuzhu Lin
- St. Vincent's Institute of Medical Research, Fitzroy, VIC, Australia.
| | - Danise-Ann Onda
- St. Vincent's Institute of Medical Research, Fitzroy, VIC, Australia
| | - Chieh-Hsin Yang
- St. Vincent's Institute of Medical Research, Fitzroy, VIC, Australia
| | - Joshua R Lewis
- School of Medical and Health Sciences, Edith Cowan University, Perth, Australia; Medical School, University of Western Australia, Perth, Australia
| | - Itamar Levinger
- Institute for Health and Sport (IHES), Victoria University, Footscray, VIC, Australia; Australian Institute for Musculoskeletal Science (AIMSS), University of Melbourne and Western Health, St Albans, VIC, Australia
| | - Kim Loh
- St. Vincent's Institute of Medical Research, Fitzroy, VIC, Australia; Department of Medicine, University of Melbourne, Parkville, VIC, Australia.
| |
Collapse
|
9
|
Bazacliu C, Neu J. Pathophysiology of Necrotizing Enterocolitis: An Update. Curr Pediatr Rev 2019; 15:68-87. [PMID: 30387398 DOI: 10.2174/1573396314666181102123030] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 09/12/2018] [Accepted: 09/15/2018] [Indexed: 12/12/2022]
Abstract
NEC is a devastating disease that, once present, is very difficult to treat. In the absence of an etiologic treatment, preventive measures are required. Advances in decoding the pathophysiology of NEC are being made but a more comprehensive understanding is needed for the targeting of preventative strategies. A better definition of the disease as well as diagnostic criteria are needed to be able to specifically label a disease as NEC. Multiple environmental factors combined with host susceptibility appear to contribute to enhanced risks for developing this disease. Several different proximal pathways are involved, all leading to a common undesired outcome: Intestinal necrosis. The most common form of this disease appears to involve inflammatory pathways that are closely meshed with the intestinal microbiota, where a dysbiosis may result in dysregulated inflammation. The organisms present in the intestinal tract prior to the onset of NEC along with their diversity and functional capabilities are just beginning to be understood. Fulfillment of postulates that support causality for particular microorganisms is needed if bacteriotherapies are to be intelligently applied for the prevention of NEC. Identification of molecular effector pathways that propagate inflammation, understanding of, even incipient role of genetic predisposition and of miRNAs may help solve the puzzle of this disease and may bring the researchers closer to finding a treatment. Despite recent progress, multiple limitations of the current animal models, difficulties related to studies in humans, along with the lack of a "clear" definition will continue to make it a very challenging disease to decipher.
Collapse
Affiliation(s)
- Catalina Bazacliu
- Department of Pediatrics, Division of Neonatology, University of Florida, FL, United States
| | - Josef Neu
- Department of Pediatrics, Division of Neonatology, University of Florida, FL, United States
| |
Collapse
|
10
|
Wan X, Zhou C, Kang X, Hu D, Xue W, Li X, Bao H, Peng A. Metabolic Profiling of Amino Acids Associated with Mortality in Patients with Acute Paraquat Poisoning. Med Sci Monit 2018. [PMID: 29513648 PMCID: PMC5854108 DOI: 10.12659/msm.905843] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Background Paraquat is a major cause of fatal poisoning after ingestion in many parts of Asia and the Pacific nations. However, optimal prognostic indicators to evaluate patient mortality have not been unequivocally established. Following acute paraquat poisoning, a number of amino acids (AA), are abnormally expressed in metabolic pathways. However, the alterations in AA metabolite levels after paraquat poisoning remain unknown in humans. Material/Methods In the present study, 40 patients were enrolled, of whom 16 survived and 24 died. A metabolomics approach was used to assess changes in AA metabolites in plasma and its potential prognostic value following paraquat poisoning. Mass spectrometry (MS) based on metabolite identification was conducted. Results Twenty-five AA levels in plasma were abnormally expressed in non-survivor patients. Among them, creatinine, indolelactate, and 3-(4-hydroxyphenyl)lactate were found to be highly correlated with paraquat death prediction. It was noted that the intensity levels of these 3 AA metabolites in the non-survivor group were substantially higher than in the survivor group. Furthermore, we examined receiver operating characteristic (ROC) curves for clinical validation. ROC results showed that 3-(4-hydroxyphenyl)lactate had the highest AUC of 0.84, while indolelactate and creatinine had AUCs of 0.75 and 0.83, respectively, suggesting that they can be used to predict the clinical outcome (although this methodology is expensive to implement). Conclusions Metabolic profiling of AA levels could be a reliable tool to identify effective indicators for the early high precision prognosis of paraquat poisoning.
Collapse
Affiliation(s)
- Xiuxian Wan
- Department of Nephrology and Rheumatology, Affiliated Shanghai Tenth Clinical Medical College of Nanjing Medical University, Nanjing, Jiangsu, China (mainland).,Department of Nephrology, Lianyungang Oriental Hospital, Lianyungang, Jiangsu, China (mainland)
| | - Chunyu Zhou
- Center for Nephrology and Clinical Metabolomics, Tongji University School of Medicine, Shanghai, China (mainland)
| | - Xin Kang
- Center for Nephrology and Clinical Metabolomics, Tongji University School of Medicine, Shanghai, China (mainland)
| | - Dayong Hu
- Center for Nephrology and Clinical Metabolomics, Tongji University School of Medicine, Shanghai, China (mainland)
| | - Wen Xue
- Center for Nephrology and Clinical Metabolomics, Tongji University School of Medicine, Shanghai, China (mainland)
| | - Xinhua Li
- Center for Nephrology and Clinical Metabolomics, Tongji University School of Medicine, Shanghai, China (mainland)
| | - Hui Bao
- Department of Nephrology and Rheumatology, Affiliated Shanghai Tenth Clinical Medical College of Nanjing Medical University, Nanjing, Jiangsu, China (mainland).,Center for Nephrology and Clinical Metabolomics, Tongji University School of Medicine, Shanghai, China (mainland)
| | - Ai Peng
- Department of Nephrology and Rheumatology, Affiliated Shanghai Tenth Clinical Medical College of Nanjing Medical University, Nanjing, Jiangsu, China (mainland).,Center for Nephrology and Clinical Metabolomics, Tongji University School of Medicine, Shanghai, China (mainland)
| |
Collapse
|
11
|
Abstract
Traditionally cellular respiration or metabolism has been viewed as catabolic and anabolic pathways generating energy and biosynthetic precursors required for growth and general cellular maintenance. However, growing literature provides evidence of a much broader role for metabolic reactions and processes in controlling immunological effector functions. Much of this research into immunometabolism has focused on macrophages, cells that are central in pro- as well as anti-inflammatory responses—responses that in turn are a direct result of metabolic reprogramming. As we learn more about the precise role of metabolic pathways and pathway intermediates in immune function, a novel opportunity to target immunometabolism therapeutically has emerged. Here, we review the current understanding of the regulation of macrophage function through metabolic remodeling.
Collapse
Affiliation(s)
- Ciana Diskin
- School of Biochemistry and Immunology, Trinity College Dublin, Trinity Biomedical Science Institute, Dublin, Ireland
| | - Eva M Pålsson-McDermott
- School of Biochemistry and Immunology, Trinity College Dublin, Trinity Biomedical Science Institute, Dublin, Ireland
| |
Collapse
|
12
|
Šafránková B, Hermannová M, Nešporová K, Velebný V, Kubala L. Absence of differences among low, middle, and high molecular weight hyaluronan in activating murine immune cells in vitro. Int J Biol Macromol 2017; 107:1-8. [PMID: 28860059 DOI: 10.1016/j.ijbiomac.2017.08.131] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Revised: 05/17/2017] [Accepted: 08/22/2017] [Indexed: 12/27/2022]
Abstract
Hyaluronan (HA) effects on immune response are suggested to be dependent on HA molecular weight (MW), as low MW HA should activate immune cells in contrast to high MW HA. However, some current studies do not support this conception and emphasize the importance of the form of preparation of HA, particularly with respect to its purity and origin. We compared the activation of mouse immune cells by HA samples (100kDa, 500kDa, and 997kDa) prepared from HA originating from rooster comb, and HA samples (71kDa, 500kDa, and 1000kDa) prepared from pharmacological grade HA originating from Streptococcus equi. Interestingly, in contrast to established theory, only middle and high MW HA originating from rooster comb induced the production of tumor necrosis factor-α by macrophages and in whole blood. Further, all tested preparations of HA failed to induce the expression of inducible nitric oxide synthase, the production of nitric oxide, or the expression of cyclooxygenase 2 in macrophages and splenocytes. Importantly, all HA samples originating from rooster comb were found to be contaminated by endotoxin (up to 1.23EU/ml). Hence, low MW HA did not reveal itself to have significantly higher immunostimulatory activity compared to HA of higher MW.
Collapse
Affiliation(s)
- Barbora Šafránková
- Contipro a.s. 401, 561 02 Dolni Dobrouc, Czech Republic; Institute of Biophysics, Academy of Sciences of the Czech Republic, 612 65 Brno, Czech Republic
| | | | - Kristina Nešporová
- Contipro a.s. 401, 561 02 Dolni Dobrouc, Czech Republic; Institute of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | | | - Lukáš Kubala
- Institute of Biophysics, Academy of Sciences of the Czech Republic, 612 65 Brno, Czech Republic; Institute of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic; International Clinical Research Center - Center of Biomolecular and Cellular Engineering, St. Anne's University Hospital, Brno, Czech Republic.
| |
Collapse
|
13
|
Kheddo P, Golovanov AP, Mellody KT, Uddin S, van der Walle CF, Dearman RJ. The effects of arginine glutamate, a promising excipient for protein formulation, on cell viability: Comparisons with NaCl. Toxicol In Vitro 2016; 33:88-98. [PMID: 26873863 PMCID: PMC4837223 DOI: 10.1016/j.tiv.2016.02.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Revised: 01/28/2016] [Accepted: 02/06/2016] [Indexed: 12/31/2022]
Abstract
The effects of an equimolar mixture of l-arginine and l-glutamate (Arg·Glu) on cell viability and cellular stress using in vitro cell culture systems are examined with reference to NaCl, in the context of monoclonal antibody formulation. Cells relevant to subcutaneous administration were selected: the human monocyte cell line THP-1, grown as a single cell suspension, and adherent human primary fibroblasts. For THP-1 cells, the mechanism of cell death caused by relatively high salt concentrations was investigated and effects on cell activation/stress assessed as a function of changes in membrane marker and cytokine (interleukin-8) expression. These studies demonstrated that Arg·Glu does not have any further detrimental effects on THP-1 viability in comparison to NaCl at equivalent osmolalities, and that both salts at higher concentrations cause cell death by apoptosis; there was no significant effect on measures of THP-1 cellular stress/activation. For adherent fibroblasts, both salts caused significant toxicity at ~400 mOsm/kg, although Arg·Glu caused a more precipitous subsequent decline in viability than did NaCl. These data indicate that Arg·Glu is of equivalent toxicity to NaCl and that the mechanism of toxicity is such that cell death is unlikely to trigger inflammation upon subcutaneous injection in vivo.
Collapse
Affiliation(s)
- Priscilla Kheddo
- Manchester Institute of Biotechnology, University of Manchester, Manchester M1 7DN, UK; Faculty of Life Sciences, University of Manchester, Manchester M13 9PL, UK
| | - Alexander P Golovanov
- Manchester Institute of Biotechnology, University of Manchester, Manchester M1 7DN, UK; Faculty of Life Sciences, University of Manchester, Manchester M13 9PL, UK
| | - Kieran T Mellody
- Faculty of Life Sciences, University of Manchester, Manchester M13 9PL, UK
| | - Shahid Uddin
- MedImmune Ltd, Granta Park, Cambridge CB21 6GH, UK
| | | | - Rebecca J Dearman
- Faculty of Life Sciences, University of Manchester, Manchester M13 9PL, UK.
| |
Collapse
|
14
|
Bone marrow-derived macrophages exclusively expressed caveolin-2: The role of inflammatory activators and hypoxia. Immunobiology 2015. [DOI: 10.1016/j.imbio.2015.06.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
15
|
Pekarova M, Lojek A. The crucial role of l-arginine in macrophage activation: What you need to know about it. Life Sci 2015; 137:44-8. [PMID: 26188591 DOI: 10.1016/j.lfs.2015.07.012] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Revised: 07/07/2015] [Accepted: 07/11/2015] [Indexed: 11/19/2022]
Abstract
Nowadays, it is well recognized that amino acids are powerful molecules responsible for regulatory control over fundamental cellular processes. However, our understanding of the signaling cascades involved in amino acid sensing in organisms, as well as signal initiation, is largely limited. This is also the case of semi-essential amino acid l-arginine, which has multiple metabolic fates, and it is considered as one of the most versatile amino acids. Recently, some new and important facts have been published considering the role of l-arginine in the regulation of inflammatory processes in several human and mouse models, mediated also via the regulation of macrophage activation. Therefore, this mini review focuses on the actual summarization of information about (i) l-arginine bioavailability in organism, (ii) l-arginine-dependent regulation of nitric oxide synthase expression and nitric oxide production, and importantly (iii) its role in the activation of intracellular signaling pathways and G-protein-coupled receptors in macrophages.
Collapse
Affiliation(s)
- Michaela Pekarova
- Institute of Biophysics, Academy of Sciences of the Czech Republic, Kralovopolska 135, 612 65 Brno, Czech Republic.
| | - Antonin Lojek
- Institute of Biophysics, Academy of Sciences of the Czech Republic, Kralovopolska 135, 612 65 Brno, Czech Republic
| |
Collapse
|
16
|
Pekarova M, Koudelka A, Kolarova H, Ambrozova G, Klinke A, Cerna A, Kadlec J, Trundova M, Sindlerova Svihalkova L, Kuchta R, Kuchtova Z, Lojek A, Kubala L. Asymmetric dimethyl arginine induces pulmonary vascular dysfunction via activation of signal transducer and activator of transcription 3 and stabilization of hypoxia-inducible factor 1-alpha. Vascul Pharmacol 2015; 73:138-48. [PMID: 26091577 DOI: 10.1016/j.vph.2015.06.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Revised: 05/02/2015] [Accepted: 06/15/2015] [Indexed: 11/16/2022]
Abstract
Pulmonary hypertension (PH), associated with imbalance in vasoactive mediators and massive remodeling of pulmonary vasculature, represents a serious health complication. Despite the progress in treatment, PH patients typically have poor prognoses with severely affected quality of life. Asymmetric dimethyl arginine (ADMA), endogenous inhibitor of endothelial nitric oxide synthase (eNOS), also represents one of the critical regulators of pulmonary vascular functions. The present study describes a novel mechanism of ADMA-induced dysfunction in human pulmonary endothelial and smooth muscle cells. The effect of ADMA was compared with well-established model of hypoxia-induced pulmonary vascular dysfunction. It was discovered for the first time that ADMA induced the activation of signal transducer and activator of transcription 3 (STAT3) and stabilization of hypoxia inducible factor 1α (HIF-1α) in both types of cells, associated with drastic alternations in normal cellular functions (e.g., nitric oxide production, cell proliferation/Ca(2+) concentration, production of pro-inflammatory mediators, and expression of eNOS, DDAH1, and ICAM-1). Additionally, ADMA significantly enhanced the hypoxia-mediated increase in the signaling cascades. In summary, increased ADMA may lead to manifestation of PH phenotype in human endothelial and smooth muscle cells via the STAT3/HIF-1α cascade. Therefore this signaling pathway represents the potential pathway for future clinical interventions in PH.
Collapse
Affiliation(s)
- Michaela Pekarova
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, 612 65 Brno, Czech Republic.
| | - Adolf Koudelka
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, 612 65 Brno, Czech Republic
| | - Hana Kolarova
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, 612 65 Brno, Czech Republic
| | - Gabriela Ambrozova
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, 612 65 Brno, Czech Republic
| | - Anna Klinke
- Department of Experimental Cardiology, University Hospital of Cologne, Kerpener Str. 62, 50924 Cologne, Germany
| | - Anna Cerna
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, 612 65 Brno, Czech Republic
| | - Jaroslav Kadlec
- Faculty of Electrical Engineering and Communication, Brno University of Technology, Technicka 3058/10, 616 00 Brno, Czech Republic
| | - Maria Trundova
- Institute of Biotechnology, Academy of Sciences of the Czech Republic, v.v.i., BIOCEV, Videnska 1083, 142 20 Prague 4, Czech Republic
| | - Lenka Sindlerova Svihalkova
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, 612 65 Brno, Czech Republic
| | - Radek Kuchta
- Faculty of Electrical Engineering and Communication, Brno University of Technology, Technicka 3058/10, 616 00 Brno, Czech Republic
| | - Zdenka Kuchtova
- Faculty of Electrical Engineering and Communication, Brno University of Technology, Technicka 3058/10, 616 00 Brno, Czech Republic
| | - Antonin Lojek
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, 612 65 Brno, Czech Republic
| | - Lukas Kubala
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, 612 65 Brno, Czech Republic; International Clinical Research Center - Center of Biomolecular and Cellular Engineering, St. Anne's University Hospital, Brno, Czech Republic
| |
Collapse
|
17
|
Badurdeen S, Mulongo M, Berkley JA. Arginine depletion increases susceptibility to serious infections in preterm newborns. Pediatr Res 2015; 77:290-7. [PMID: 25360828 PMCID: PMC4335378 DOI: 10.1038/pr.2014.177] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Accepted: 09/02/2014] [Indexed: 12/21/2022]
Abstract
Preterm newborns are highly susceptible to bacterial infections. This susceptibility is regarded as being due to immaturity of multiple pathways of the immune system. However, it is unclear whether a mechanism that unifies these different, suppressed pathways exists. Here, we argue that the immune vulnerability of the preterm neonate is critically related to arginine depletion. Arginine, a "conditionally essential" amino acid, is depleted in acute catabolic states, including sepsis. Its metabolism is highly compartmentalized and regulated, including by arginase-mediated hydrolysis. Recent data suggest that arginase II-mediated arginine depletion is essential for the innate immune suppression that occurs in newborn models of bacterial challenge, impairing pathways critical for the immune response. Evidence that arginine depletion mediates protection from immune activation during first gut colonization suggests a regulatory role in controlling gut-derived pathogens. Clinical studies show that plasma arginine is depleted during sepsis. In keeping with animal studies, small clinical trials of L-arginine supplementation have shown benefit in reducing necrotizing enterocolitis in premature neonates. We propose a novel, broader hypothesis that arginine depletion during bacterial challenge is a key factor limiting the neonate's ability to mount an adequate immune response, contributing to the increased susceptibility to infections, particularly with respect to gut-derived sepsis.
Collapse
Affiliation(s)
- Shiraz Badurdeen
- Department of Paediatrics, Oxford University Hospitals NHS Trust, Oxford, UK,()
| | - Musa Mulongo
- KEMRI-Wellcome Trust, Centre for Geographic Medicine and Research-Coast, Kilifi, Kenya
| | - James A. Berkley
- KEMRI-Wellcome Trust, Centre for Geographic Medicine and Research-Coast, Kilifi, Kenya,Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
| |
Collapse
|