1
|
Dong Y, Wang J, Yang C, Bao J, Liu X, Chen H, Zhang X, Shi W, Zhang L, Qi Q, Li Y, Wang S, Ma R, Cong B, Zhang G. Phosphorylated CPI-17 and MLC2 as Biomarkers of Coronary Artery Spasm-Induced Sudden Cardiac Death. Int J Mol Sci 2024; 25:2941. [PMID: 38474189 PMCID: PMC10932290 DOI: 10.3390/ijms25052941] [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: 01/04/2024] [Revised: 02/19/2024] [Accepted: 02/28/2024] [Indexed: 03/14/2024] Open
Abstract
Coronary artery spasm (CAS) plays an important role in the pathogeneses of various ischemic heart diseases and has gradually become a common cause of life-threatening arrhythmia. The specific molecular mechanism of CAS has not been fully elucidated, nor are there any specific diagnostic markers for the condition. Therefore, this study aimed to examine the specific molecular mechanism underlying CAS, and screen for potential diagnostic markers. To this end, we successfully constructed a rat CAS model and achieved in vitro culture of a human coronary-artery smooth-muscle cell (hCASMC) contraction model. Possible molecular mechanisms by which protein kinase C (PKC) regulated CAS through the C kinase-potentiated protein phosphatase 1 inhibitor of 17 kDa (CPI-17)/myosin II regulatory light chain (MLC2) pathway were studied in vivo and in vitro to screen for potential molecular markers of CAS. We performed hematoxylin and eosin staining, myocardial zymogram, and transmission electron microscopy to determine myocardial and coronary artery injury in CAS rats. Then, using immunohistochemical staining, immunofluorescence staining, and Western blotting, we further demonstrated a potential molecular mechanism by which PKC regulated CAS via the CPI-17/MLC2 pathway. The results showed that membrane translocation of PKCα occurred in the coronary arteries of CAS rats. CPI-17/MLC2 signaling was observably activated in coronary arteries undergoing CAS. In addition, in vitro treatment of hCASMCs with angiotensin II (Ang II) increased PKCα membrane translocation while consistently activating CPI-17/MLC2 signaling. Conversely, GF-109203X and calphostin C, specific inhibitors of PKC, inactivated CPI-17/MLC2 signaling. We also collected the coronary artery tissues from deceased subjects suspected to have died of CAS and measured their levels of phosphorylated CPI-17 (p-CPI-17) and MLC2 (p-MLC2). Immunohistochemical staining was positive for p-CPI-17 and p-MLC2 in the tissues of these subjects. These findings suggest that PKCα induced CAS through the CPI-17/MLC2 pathway; therefore, p-CPI-17 and p-MLC2 could be used as potential markers for CAS. Our data provide novel evidence that therapeutic strategies against PKC or CPI-17/MLC2 signaling might be promising in the treatment of CAS.
Collapse
Affiliation(s)
- Yiming Dong
- Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China; (Y.D.); (J.W.); (C.Y.); (J.B.); (X.L.); (H.C.); (X.Z.); (W.S.); (L.Z.); (Q.Q.); (Y.L.); (S.W.); (R.M.); (B.C.)
| | - Jianfeng Wang
- Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China; (Y.D.); (J.W.); (C.Y.); (J.B.); (X.L.); (H.C.); (X.Z.); (W.S.); (L.Z.); (Q.Q.); (Y.L.); (S.W.); (R.M.); (B.C.)
| | - Chenteng Yang
- Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China; (Y.D.); (J.W.); (C.Y.); (J.B.); (X.L.); (H.C.); (X.Z.); (W.S.); (L.Z.); (Q.Q.); (Y.L.); (S.W.); (R.M.); (B.C.)
| | - Junxia Bao
- Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China; (Y.D.); (J.W.); (C.Y.); (J.B.); (X.L.); (H.C.); (X.Z.); (W.S.); (L.Z.); (Q.Q.); (Y.L.); (S.W.); (R.M.); (B.C.)
| | - Xia Liu
- Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China; (Y.D.); (J.W.); (C.Y.); (J.B.); (X.L.); (H.C.); (X.Z.); (W.S.); (L.Z.); (Q.Q.); (Y.L.); (S.W.); (R.M.); (B.C.)
| | - Hao Chen
- Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China; (Y.D.); (J.W.); (C.Y.); (J.B.); (X.L.); (H.C.); (X.Z.); (W.S.); (L.Z.); (Q.Q.); (Y.L.); (S.W.); (R.M.); (B.C.)
| | - Xiaojing Zhang
- Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China; (Y.D.); (J.W.); (C.Y.); (J.B.); (X.L.); (H.C.); (X.Z.); (W.S.); (L.Z.); (Q.Q.); (Y.L.); (S.W.); (R.M.); (B.C.)
| | - Weibo Shi
- Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China; (Y.D.); (J.W.); (C.Y.); (J.B.); (X.L.); (H.C.); (X.Z.); (W.S.); (L.Z.); (Q.Q.); (Y.L.); (S.W.); (R.M.); (B.C.)
| | - Lihua Zhang
- Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China; (Y.D.); (J.W.); (C.Y.); (J.B.); (X.L.); (H.C.); (X.Z.); (W.S.); (L.Z.); (Q.Q.); (Y.L.); (S.W.); (R.M.); (B.C.)
| | - Qian Qi
- Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China; (Y.D.); (J.W.); (C.Y.); (J.B.); (X.L.); (H.C.); (X.Z.); (W.S.); (L.Z.); (Q.Q.); (Y.L.); (S.W.); (R.M.); (B.C.)
| | - Yingmin Li
- Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China; (Y.D.); (J.W.); (C.Y.); (J.B.); (X.L.); (H.C.); (X.Z.); (W.S.); (L.Z.); (Q.Q.); (Y.L.); (S.W.); (R.M.); (B.C.)
| | - Songjun Wang
- Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China; (Y.D.); (J.W.); (C.Y.); (J.B.); (X.L.); (H.C.); (X.Z.); (W.S.); (L.Z.); (Q.Q.); (Y.L.); (S.W.); (R.M.); (B.C.)
| | - Rufei Ma
- Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China; (Y.D.); (J.W.); (C.Y.); (J.B.); (X.L.); (H.C.); (X.Z.); (W.S.); (L.Z.); (Q.Q.); (Y.L.); (S.W.); (R.M.); (B.C.)
| | - Bin Cong
- Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China; (Y.D.); (J.W.); (C.Y.); (J.B.); (X.L.); (H.C.); (X.Z.); (W.S.); (L.Z.); (Q.Q.); (Y.L.); (S.W.); (R.M.); (B.C.)
| | - Guozhong Zhang
- Hebei Key Laboratory of Forensic Medicine, Collaborative Innovation Center of Forensic Medical Molecular Identification, College of Forensic Medicine, Hebei Medical University, Shijiazhuang 050017, China; (Y.D.); (J.W.); (C.Y.); (J.B.); (X.L.); (H.C.); (X.Z.); (W.S.); (L.Z.); (Q.Q.); (Y.L.); (S.W.); (R.M.); (B.C.)
- Hebei Province Laboratory of Experimental Animal, Shijiazhuang 050017, China
| |
Collapse
|
2
|
Patchen BK, Balte P, Bartz TM, Barr RG, Fornage M, Graff M, Jacobs DR, Kalhan R, Lemaitre RN, O'Connor G, Psaty B, Seo J, Tsai MY, Wood AC, Xu H, Zhang J, Gharib SA, Manichaikul A, North K, Steffen LM, Dupuis J, Oelsner E, Hancock DB, Cassano PA. Investigating Associations of Omega-3 Fatty Acids, Lung Function Decline, and Airway Obstruction. Am J Respir Crit Care Med 2023; 208:846-857. [PMID: 37470492 DOI: 10.1164/rccm.202301-0074oc] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 06/26/2023] [Indexed: 07/21/2023] Open
Abstract
Rationale: Inflammation contributes to lung function decline and the development of chronic obstructive pulmonary disease. Omega-3 fatty acids have antiinflammatory properties and may benefit lung health. Objectives: To investigate associations of omega-3 fatty acids with lung function decline and incident airway obstruction in a diverse sample of adults from general-population cohorts. Methods: Complementary study designs: 1) longitudinal study of plasma phospholipid omega-3 fatty acids and repeated FEV1 and FVC measures in the NHLBI Pooled Cohorts Study and 2) two-sample Mendelian randomization (MR) study of genetically predicted omega-3 fatty acids and lung function parameters. Measurements and Main Results: The longitudinal study found that higher omega-3 fatty acid levels were associated with attenuated lung function decline in 15,063 participants, with the largest effect sizes for the most metabolically downstream omega-3 fatty acid, docosahexaenoic acid (DHA). An increase in DHA of 1% of total fatty acids was associated with attenuations of 1.4 ml/yr for FEV1 (95% confidence interval [CI], 1.1-1.8) and 2.0 ml/yr for FVC (95% CI, 1.6-2.4) and a 7% lower incidence of spirometry-defined airway obstruction (95% CI, 0.89-0.97). DHA associations persisted across sexes and smoking histories and in Black, White, and Hispanic participants, with associations of the largest magnitude in former smokers and Hispanic participants. The MR study showed similar trends toward positive associations of genetically predicted downstream omega-3 fatty acids with FEV1 and FVC. Conclusions: The longitudinal and MR studies provide evidence supporting beneficial effects of higher levels of downstream omega-3 fatty acids, especially DHA, on lung health.
Collapse
Affiliation(s)
- Bonnie K Patchen
- Division of Nutritional Sciences, Cornell University, Ithaca, New York
| | - Pallavi Balte
- Department of Medicine, Columbia University College of Physicians and Surgeons, New York, New York
| | - Traci M Bartz
- Cardiovascular Health Research Unit, Departments of Medicine, Epidemiology, and Health Systems and Population Health
| | - R Graham Barr
- Department of Medicine, Columbia University College of Physicians and Surgeons, New York, New York
| | - Myriam Fornage
- Brown Foundation Institute of Molecular Medicine, McGovern Medical School, University of Texas Health Science Center, Houston, Texas
| | - Mariaelisa Graff
- Department of Epidemiology, University of North Carolina, Chapel Hill, North Carolina
| | - David R Jacobs
- Division of Epidemiology and Community Health, University of Minnesota School of Public Health, Minneapolis, Minnesota
| | - Ravi Kalhan
- Departments of Medicine and Preventative Medicine, Northwestern Medicine, Chicago, Illinois
| | - Rozenn N Lemaitre
- Cardiovascular Health Research Unit, Departments of Medicine, Epidemiology, and Health Systems and Population Health
| | - George O'Connor
- Pulmonary, Allergy, Sleep and Critical Care Medicine, Boston University School of Medicine, Boston, Massachusetts
| | - Bruce Psaty
- Cardiovascular Health Research Unit, Departments of Medicine, Epidemiology, and Health Systems and Population Health
| | - Jungkyun Seo
- Department of Epidemiology, University of North Carolina, Chapel Hill, North Carolina
| | - Michael Y Tsai
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, Minnesota
| | - Alexis C Wood
- U.S. Department of Agriculture/Agricultural Research Service Children Nutrition Research Center, Houston, Texas
| | - Hanfei Xu
- Departments of Biostatistics and Epidemiology, Boston University School of Public Health, Boston, Massachusetts
| | - Jingwen Zhang
- Departments of Biostatistics and Epidemiology, Boston University School of Public Health, Boston, Massachusetts
| | - Sina A Gharib
- Division of Pulmonary, Critical Care, and Sleep Medicine, University of Washington, Seattle, Washington
| | - Ani Manichaikul
- Center for Public Health Genomics, University of Virginia, Charlottesville, Virginia
| | - Kari North
- Brown Foundation Institute of Molecular Medicine, McGovern Medical School, University of Texas Health Science Center, Houston, Texas
| | - Lyn M Steffen
- Department of Epidemiology, University of North Carolina, Chapel Hill, North Carolina
| | - Josée Dupuis
- U.S. Department of Agriculture/Agricultural Research Service Children Nutrition Research Center, Houston, Texas
- Department of Epidemiology, Biostatistics and Occupational Health, School of Population and Global Health, McGill University, Montréal, Québec, Canada
| | - Elizabeth Oelsner
- Department of Medicine, Columbia University College of Physicians and Surgeons, New York, New York
| | - Dana B Hancock
- RTI International, Research Triangle Park, North Carolina; and
| | - Patricia A Cassano
- Division of Nutritional Sciences, Cornell University, Ithaca, New York
- Department of Population Health Sciences, Weill Cornell Medicine, New York, New York
| |
Collapse
|
3
|
Heras A, Gomi R, Young M, Chang CL, Wasserman E, Sharma A, Wu W, Gu J, Balaji U, White R, Permaul P, Janahi I, Worgall TS, Worgall S. Dietary long-chain omega 3 fatty acids modify sphingolipid metabolism to facilitate airway hyperreactivity. Sci Rep 2022; 12:19735. [PMID: 36396956 PMCID: PMC9672127 DOI: 10.1038/s41598-022-21083-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 09/22/2022] [Indexed: 11/19/2022] Open
Abstract
Omega-3 polyunsaturated fatty acids (n-3 PUFAs) are essential nutrients that can affect inflammatory responses. While n-3 PUFAs are generally considered beneficial for cardiovascular disease and obesity, the effects on asthma, the most common inflammatory lung disease are unclear. While prenatal dietary n-3 PUFAs decrease the risk for childhood wheezing, postnatal dietary n-3 PUFAs can worsen allergic airway inflammation. Sphingolipid metabolism is also affected by dietary n-3 PUFAs. Decreased sphingolipid synthesis leads to airway hyperreactivity, besides inflammation, a cardinal feature of asthma, and common genetic asthma risk alleles lead to lower sphingolipid synthesis. We investigated the effect of dietary n-3 PUFAs on sphingolipid metabolism and airway reactivity. Comparing a fish-oil diet with a high n-3 PUFA content (FO) to an isocaloric coconut oil-enriched diet (CO), we found an n-3 PUFA-dependent effect on increased airway reactivity, that was not accompanied by inflammation. Lung and whole blood content of dihydroceramides, ceramides, sphingomyelins, and glucosylceramides were lower in mice fed the n-3 PUFA enriched diet consistent with lower sphingolipid synthesis. In contrast, phosphorylated long chain bases such as sphingosine 1-phosphate were increased. These findings suggest that dietary n-3 PUFAs affect pulmonary sphingolipid composition to favor innate airway hyperreactivity, independent of inflammation, and point to an important role of n-3 PUFAs in sphingolipid metabolism.
Collapse
Affiliation(s)
- Andrea Heras
- Department of Pediatrics, Weill Cornell Medicine, 413 East 69th Street, Room 1200, New York, NY, 10021, USA
| | - Rika Gomi
- Department of Pediatrics, Weill Cornell Medicine, 413 East 69th Street, Room 1200, New York, NY, 10021, USA
| | - Madeline Young
- Department of Pediatrics, Weill Cornell Medicine, 413 East 69th Street, Room 1200, New York, NY, 10021, USA
| | - Chuchun L Chang
- Institute of Human Nutrition/Department of Pediatrics, Columbia University Medical Center, New York, NY, USA
| | - Emily Wasserman
- Department of Pediatrics, Weill Cornell Medicine, 413 East 69th Street, Room 1200, New York, NY, 10021, USA
- Weill Cornell Medicine, Drukier Institute for Children's Health, New York, USA
| | - Anurag Sharma
- Department of Pediatrics, Weill Cornell Medicine, 413 East 69th Street, Room 1200, New York, NY, 10021, USA
| | - Wenzhu Wu
- Department of Pediatrics, Weill Cornell Medicine, 413 East 69th Street, Room 1200, New York, NY, 10021, USA
| | - Jinghua Gu
- Weill Cornell Medicine, Drukier Institute for Children's Health, New York, USA
| | - Uthra Balaji
- Weill Cornell Medicine, Drukier Institute for Children's Health, New York, USA
| | - Rachel White
- Department of Pediatrics, Weill Cornell Medicine, 413 East 69th Street, Room 1200, New York, NY, 10021, USA
| | - Perdita Permaul
- Department of Pediatrics, Weill Cornell Medicine, 413 East 69th Street, Room 1200, New York, NY, 10021, USA
| | | | - Tilla S Worgall
- Department of Pathology and Cell Biology, Columbia University Medical Center, New York, USA
| | - Stefan Worgall
- Department of Pediatrics, Weill Cornell Medicine, 413 East 69th Street, Room 1200, New York, NY, 10021, USA.
- Weill Cornell Medicine, Drukier Institute for Children's Health, New York, USA.
- Department of Genetic Medicine, Weill Cornell Medicine, New York, USA.
| |
Collapse
|
4
|
Potential Role of Omega-3 Polyunsaturated Fatty Acids in Pediatric Food Allergy. Nutrients 2021; 14:nu14010152. [PMID: 35011028 PMCID: PMC8746967 DOI: 10.3390/nu14010152] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2021] [Revised: 12/22/2021] [Accepted: 12/24/2021] [Indexed: 02/07/2023] Open
Abstract
Polyunsaturated fatty acids (PUFAs) are involved both in immune system regulation and inflammation. In particular, within the PUFAs category, omega-3 (ω-3) may reduce inflammation, whereas omega-6 (ω-6) PUFAs are generally considered to have a proinflammatory effect. Recent evidence highlights an imbalance in the ω-3:ω-6 ratio with an increased intake of ω-6, as a consequence of the shift towards a westernized diet. In critical age groups such as infants, toddlers and young children, as well as pregnant and lactating women or fish allergic patients, ω-3 intake may be inadequate. This review aims to discuss the potential beneficial effects of PUFAs on pediatric food allergy prevention and treatment, both at prenatal and postnatal ages. Data from preclinical studies with PUFAs supplementation show encouraging effects in suppressing allergic response. Clinical studies results are still conflicting about the best timing and dosages of supplementation and which individuals are most likely to benefit; therefore, it is still not possible to draw firm conclusions. With regard to food-allergic children, it is still debated whether PUFAs could slow disease progression or not, since consistent data are lacking. In conclusion, more data on the effects of ω-3 PUFAs supplementation alone or in combination with other nutrients are warranted, both in the general and food allergic population.
Collapse
|
5
|
Pan J, Ma N, Zhong J, Yu B, Wan J, Zhang W. Age-associated changes in microglia and astrocytes ameliorate blood-brain barrier dysfunction. MOLECULAR THERAPY. NUCLEIC ACIDS 2021; 26:970-986. [PMID: 34760339 PMCID: PMC8561003 DOI: 10.1016/j.omtn.2021.08.030] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Accepted: 08/30/2021] [Indexed: 02/06/2023]
Abstract
Blood-brain barrier (BBB) dysfunction is associated with an accumulation of neurotoxic molecules and increased infiltration of peripheral cells within the brain parenchyma. Accruing evidence suggests that microglia and astrocytes play a crucial role in the recovery of BBB integrity and the corralling of infiltrating cells into clusters after brain damage, but the mechanisms involved remain unclear. Intriguingly, the results of flow cytometry and immunofluorescence analyses have shown that BBB permeability to peripheral cells is substantially enhanced during normal aging at 12 months in mice. Thus, we used the SMART-seq2 method to perform RNA sequencing of microglia and astrocytes at five time points before and immediately after the BBB permeability change. Our comprehensive analyses revealed that microglia are characterized by marked alterations in the negative regulation of protein phosphorylation and phagocytic vesicles, whereas astrocytes show elevated enzyme or peptidase-inhibitor activity in the recovery of BBB function. Moreover, we identified a cassette of key genes that might ameliorate the insults of pathophysiological events in aging and neurodegenerative disease.
Collapse
Affiliation(s)
- Jie Pan
- Greater Bay Biomedical Innocenter, Shenzhen Bay Laboratory, Shenzhen, Guangdong Province, China.,Department of Pathology and Neuropathology, Stanford University School of Medicine, CA 94305, USA
| | - Nana Ma
- Greater Bay Biomedical Innocenter, Shenzhen Bay Laboratory, Shenzhen, Guangdong Province, China
| | - Jie Zhong
- Shenzhen Key Laboratory for Neuronal Structural Biology, Biomedical Research Institute, Shenzhen Peking University - The Hong Kong University of Science and Technology Medical Center, Shenzhen, Guangdong Province, China
| | - Bo Yu
- Shenzhen Key Laboratory for Translational Medicine of Dermatology, Biomedical Research Institute, Shenzhen Peking University - The Hong Kong University of Science and Technology Medical Center, Shenzhen, Guangdong Province, China.,Department of Dermatology, Peking University Shenzhen Hospital, Shenzhen, Guangdong Province, China
| | - Jun Wan
- Greater Bay Biomedical Innocenter, Shenzhen Bay Laboratory, Shenzhen, Guangdong Province, China.,Department of Biology, School of Life Sciences, Southern University of Science and Technology, Shenzhen, Guangdong Province, PRC
| | - Wei Zhang
- Greater Bay Biomedical Innocenter, Shenzhen Bay Laboratory, Shenzhen, Guangdong Province, China
| |
Collapse
|
6
|
Iwamoto A, Hamajima H, Tsuge K, Tsuruta Y, Nagata Y, Yotsumoto H, Yanagita T. Inhibitory Effects of Green Asparagus Extract, Especially Phospholipids, on Allergic Responses in Vitro and in Vivo. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:15199-15207. [PMID: 33306387 DOI: 10.1021/acs.jafc.0c05615] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Asparagus (Asparagus officinalis L.) is one of the widely consumed vegetables. To investigate the mechanism underlying the anti-allergic responses of asparagus, we extracted different fractions from asparagus and measured their inhibitory effects on β-hexosaminidase release in RBL-2H3 cells in vitro and an atopic dermatitis NC/Nga mouse model in vivo. The lipid fractions from asparagus were extracted with 50% ethanol, separated using chloroform by liquid-liquid phase separation, and fractionated by solid-phase extraction. Among them, acetone fraction (rich in glycolipid) and MeOH fraction (rich in phospholipid) markedly inhibited β-hexosaminidase release from RBL-2H3 cells. In NC/Nga mice treated with picryl chloride, atopic dermatitis was alleviated following exposure to the 50% EtOH extract, acetone fraction, and methanol fraction. The inhibitory effects of asparagus fractions in vivo were supported by the significant decrease in serum immunoglobulin E (IgE) levels. The phospholipid fractions showed significantly better inhibitory effects, and phosphatidic acid from this fraction showed the best inhibitory effect on β-hexosaminidase release. In mice challenged with ovalbumin (OVA), oral administration of asparagus extract and its fractions decreased the OVA-specific IgE level and total IgE, indicating that these effects may be partly mediated through the downregulation of antigen-specific IgE production. Taken together, the present study shows for the first time that asparagus extract and its lipid fractions could potentially mitigate allergic reactions by decreasing degranulation in granulocytes. Our study provides useful information to develop nutraceuticals and functional foods fortified with asparagus.
Collapse
Affiliation(s)
- Akira Iwamoto
- Division of Food Industry, Industrial Technology Center of Saga, 114 Yaemizo, Nabeshima-machi, Saga 829-0932, Japan
| | - Hiroshi Hamajima
- Saga Food & Cosmetic Laboratory, Division of Research and Development Promotion, Saga Regional Industry Support Center, 114 Yaemizo, Nabeshima-machi, Saga 829-0932, Japan
| | - Keisuke Tsuge
- Division of Food Industry, Industrial Technology Center of Saga, 114 Yaemizo, Nabeshima-machi, Saga 829-0932, Japan
| | - Yumi Tsuruta
- Division of Food Industry, Industrial Technology Center of Saga, 114 Yaemizo, Nabeshima-machi, Saga 829-0932, Japan
| | - Yasuo Nagata
- Saga Food & Cosmetic Laboratory, Division of Research and Development Promotion, Saga Regional Industry Support Center, 114 Yaemizo, Nabeshima-machi, Saga 829-0932, Japan
- Center for Industry, University and Government Cooperation, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan
| | - Hiroaki Yotsumoto
- Department of Health and Nutrition Sciences, Nishikyushu University, 4490-9 Ozaki, Saga 842-8585, Japan
| | - Teruyoshi Yanagita
- Saga Food & Cosmetic Laboratory, Division of Research and Development Promotion, Saga Regional Industry Support Center, 114 Yaemizo, Nabeshima-machi, Saga 829-0932, Japan
- Department of Health and Nutrition Sciences, Nishikyushu University, 4490-9 Ozaki, Saga 842-8585, Japan
- Department of Applied Biochemistry and Food Science, Saga University, 1 Honjo, Honjo-machi, Saga 840-8502, Japan
| |
Collapse
|
7
|
DHA reduces hypothalamic inflammation and improves central leptin signaling in mice. Life Sci 2020; 257:118036. [PMID: 32622949 DOI: 10.1016/j.lfs.2020.118036] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 06/17/2020] [Accepted: 06/29/2020] [Indexed: 01/09/2023]
Abstract
AIMS Anti-obesity effects and improved leptin sensitivity from n-3 polyunsaturated fatty acids (n-3 PUFAs) have been reported in diet-induced obese animals. This study sought to determine the beneficial central effects and mechanism of docosahexaenoic acid (DHA, 22:6 n-3) in high-fat (HF) diet fed mice. MAIN METHODS Male C57BL/6J mice were given HF diet with or without intracerebroventricular (icv) injection of docosahexaenoic acid (DHA, 22:6 n-3) for two days. Central leptin sensitivity, hypothalamic inflammation, leptin signaling molecules and tyrosine hydroxylase (TH) were examined by central leptin sensitivity test and Western blot. Furthermore, the expression of hepatic genes involved in lipid metabolism was examined by RT-PCR. KEY FINDINGS We found that icv administration of DHA not only reduced energy intake and body weight gain but also corrected the HF diet-induced hypothalamic inflammation. DHA decreased leptin signaling inhibitor SOCS3 and improved the leptin JAK2-Akt signaling pathways in the hypothalamus. Furthermore, icv administration of DHA improved the effects of leptin in the regulation of mRNA expression of enzymes related to lipogenesis, fatty acid β-oxidation, and cholesterol synthesis in the liver. DHA increased leptin-induced activation of TH in the hypothalamus. SIGNIFICANCE Therefore, increasing central DHA concentration may prevent the deficit of hypothalamic regulation, which is associated with disorders of energy homeostasis in the liver as a result of a high-fat diet.
Collapse
|
8
|
Gazzola M, Flamand N, Bossé Y. [Extracellular molecules controlling the contraction of airway smooth muscle and their potential contribution to bronchial hyperresponsiveness]. Rev Mal Respir 2020; 37:462-473. [PMID: 32487422 DOI: 10.1016/j.rmr.2020.03.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Accepted: 03/12/2020] [Indexed: 02/06/2023]
Abstract
INTRODUCTION A significant portion of symptoms in some lung diseases results from an excessive constriction of airways due to the contraction of smooth muscle and bronchial hyperresponsiveness. A better understanding of the extracellular molecules that control smooth muscle contractility is necessary to identify the underlying causes of the problem. STATE OF KNOWLEDGE Almost a hundred molecules, some of which newly identified, influence the contractility of airway smooth muscle. While some molecules activate the contraction, others activate the relaxation, thus acting directly as bronchoconstrictors and bronchodilators, respectively. Other molecules do not affect contraction directly but rather influence it indirectly by modifying the effect of bronchoconstrictors and bronchodilators. These are called bronchomodulators. Some of these bronchomodulators increase the contractile effect of bronchoconstrictors and could thus contribute to bronchial hyperresponsiveness. PROSPECTS Considering the high number of molecules potentially involved, as well as the level of functional overlap between some of them, identifying the extracellular molecules responsible for excessive airway constriction in a patient is a major contemporary challenge.
Collapse
Affiliation(s)
| | | | - Y Bossé
- Université Laval, Québec, Canada.
| |
Collapse
|
9
|
Omega-3 fatty acids as adjunctive therapeutics: prospective of nanoparticles in its formulation development. Ther Deliv 2020; 11:851-868. [DOI: 10.4155/tde-2019-0072] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Omega-3 polyunsaturated fatty acids (ω-3-PUFAs) are dietary components that have been extensively recognized for their therapeutic value and have shown diverse therapeutic effects including anti-inflammatory, antiarrhythmic, antithrombotic, immunomodulatory and antineoplastic activities. Most of the ω-3-PUFAs are obtained through diet or supplements because the body does not synthesize them. The high instability of ω-3-PUFAs to oxidative deterioration, lower bioavailability at the target tissues and reduced bioactivity of ω-3-PUFAs is an impediment for achieving their therapeutic potential. The present review provides an overview of potential therapeutic activities of ω-3-PUFAs and different novel technical approaches based on nanotechnology, which have been emphasized to overcome instability problems as well as enhance the bioactivity of ω-3-PUFAs. Future prospects related to this area of research are also provided.
Collapse
|
10
|
Transcriptional Suppression of CPI-17 Gene Expression in Vascular Smooth Muscle Cells by Tumor Necrosis Factor, Krüppel-Like Factor 4, and Sp1 Is Associated with Lipopolysaccharide-Induced Vascular Hypocontractility, Hypotension, and Mortality. Mol Cell Biol 2019; 39:MCB.00070-19. [PMID: 30936247 PMCID: PMC6517596 DOI: 10.1128/mcb.00070-19] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 03/22/2019] [Indexed: 12/15/2022] Open
Abstract
Vasodilatory shock in sepsis is caused by the failure of the vasculature to respond to vasopressors, which results in hypotension, multiorgan failure, and ultimately patient death. Recently, it was reported that CPI-17, a key player in the regulation of smooth muscle contraction, was downregulated by lipopolysaccharide (LPS) in mesenteric arteries concordant with vascular hypocontractilty. Vasodilatory shock in sepsis is caused by the failure of the vasculature to respond to vasopressors, which results in hypotension, multiorgan failure, and ultimately patient death. Recently, it was reported that CPI-17, a key player in the regulation of smooth muscle contraction, was downregulated by lipopolysaccharide (LPS) in mesenteric arteries concordant with vascular hypocontractilty. While Sp1 has been shown to activate CPI-17 transcription, it is unknown whether Sp1 is involved in LPS-induced smooth muscle CPI-17 downregulation. Here we report that tumor necrosis factor (TNF) was critical for LPS-induced smooth muscle CPI-17 downregulation. Mechanistically, we identified two GC boxes as a key TNF response element in the CPI-17 promoter and demonstrated that KLF4 was upregulated by TNF, competed with Sp1 for the binding to the GC boxes in the CPI-17 promoter, and repressed CPI-17 transcription through histone deacetylases (HDACs). Moreover, genetic deletion of TNF or pharmacological inhibition of HDACs protected mice from LPS-induced smooth muscle CPI-17 downregulation, vascular hypocontractility, hypotension, and mortality. In summary, these data provide a novel mechanism of the transcriptional control of CPI-17 in vascular smooth muscle cells under inflammatory conditions and suggest a new potential therapeutic strategy for the treatment of vasodilatory shock in sepsis.
Collapse
|
11
|
Xiang SJ, Li MH, Chan CO, Shen Q, Chen SB, An BC, Yuen ACY, Wu WF, Tang HH, Cao SW, Ruan SF, Wang ZX, Weng LD, Zhu HX, Chen HJ, Wong MYM, Zhang Y, Mok DKW, Liu Q. Altered metabolites in guinea pigs with allergic asthma after acupoint sticking therapy: New insights from a metabolomics approach. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2019; 54:182-194. [PMID: 30668368 DOI: 10.1016/j.phymed.2018.09.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Revised: 06/16/2018] [Accepted: 09/03/2018] [Indexed: 06/09/2023]
Abstract
BACKGROUND Clinical evidence gathered in Chinese communities suggested that acupoint sticking therapy could be an alternative treatment for asthma-related diseases. However, its underlying mechanism is still poorly understood. AIM/HYPOTHESIS In this study, we aimed to investigate the mechanism of the anti-inflammatory effect of acupoint sticking application with 'Treatment of Winter Disease in Summer' (TWDS) prescription by using metabolomics. METHODS Allergic asthma in guinea pig was sensitized and challenged by ovalbumin (OVA). Histopathological evaluation of the lung tissue was performed by hematoxylin and eosin (H&E) staining and Masson's trichrome staining. The levels of Th2 cytokine and IgE level in serum were measured using enzyme-linked immunoassay (ELISA). The mRNA expression levels of IL-4, IL-5, IL-13 and orosomucoid-like 3 (ORMDL3) were measured using quantitative reverse transcription polymerase chain reaction (RT-qPCR). Proteins of NF-κB signaling pathway were measured using western blot. The serum metabolomics profiles were obtained by using ultra-performance liquid chromatography combined with electrospray ionization quadrupole time-of-flight mass spectrometry (UPLC-ESI-QTOF-MS). RESULTS The overall results confirmed that AST with TWDS prescription had a significant protective effect against OVA-induced allergic asthma in guinea pig. This treatment not only attenuated airway inflammation and collagen deposition in the airway, but also decreased the levels of IL-4, IL-5, IL-13 and IgE in serum. In addition, metabolomics results indicated that metabolisms of phospholipid, sphingolipid, purine, amino acid and level of epinephrine were restored back to the normal control level. Moreover, results of the gene expression of ORMDL3 in lung tissues indicated that AST using TWDS could alter the sphingolipid metabolism. Further western blotting analysis also showed that its anti-inflammatory mechanism was by decreasing the phosphorylation of p65 and IκB. CONCLUSION The study demonstrated that metabolomics provides a better understanding of the actions of TWDS acupoint sticking therapy on OVA-induced allergic asthma.
Collapse
Affiliation(s)
- Shi-Jian Xiang
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China
| | - Meng-Heng Li
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China
| | - Chi-On Chan
- State Key Laboratory of Chinese Medicine and Molecular Pharmacology (Incubation), Shenzhen 518057, China; Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China
| | - Qun Shen
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China
| | - Si-Bao Chen
- State Key Laboratory of Chinese Medicine and Molecular Pharmacology (Incubation), Shenzhen 518057, China; Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China
| | - Bai-Chao An
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China
| | - Ailsa Chui-Ying Yuen
- State Key Laboratory of Chinese Medicine and Molecular Pharmacology (Incubation), Shenzhen 518057, China; Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China
| | - Wen-Feng Wu
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China
| | - Hok-Him Tang
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China
| | - Si-Wei Cao
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China
| | - Shi-Fa Ruan
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China
| | - Zhu-Xian Wang
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China
| | - Li-Dong Weng
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China
| | - Hong-Xia Zhu
- Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510315, China
| | - Huo-Ji Chen
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China
| | - Melody Yee-Man Wong
- University Research Facility in Chemical and Environmental Analysis, The Hong Kong Polytechnic University, Hong Kong, China
| | - Yan Zhang
- Spine Disease Research Institute, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Daniel Kam-Wah Mok
- State Key Laboratory of Chinese Medicine and Molecular Pharmacology (Incubation), Shenzhen 518057, China; Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China.
| | - Qiang Liu
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China.
| |
Collapse
|
12
|
Krishnamoorthy N, Abdulnour REE, Walker KH, Engstrom BD, Levy BD. Specialized Proresolving Mediators in Innate and Adaptive Immune Responses in Airway Diseases. Physiol Rev 2018; 98:1335-1370. [PMID: 29717929 DOI: 10.1152/physrev.00026.2017] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Airborne pathogens and environmental stimuli evoke immune responses in the lung. It is critical to health that these responses be controlled to prevent tissue damage and the compromise of organ function. Resolution of inflammation is a dynamic process that is coordinated by biochemical and cellular mechanisms. Recently, specialized proresolving mediators (SPMs) have been identified in resolution exudates. These molecules orchestrate anti-inflammatory and proresolving actions that are cell type specific. In this review, we highlight SPM biosynthesis, the influence of SPMs on the innate and adaptive immune responses in the lung, as well as recent insights from SPMs on inflammatory disease pathophysiology. Uncovering these mediators and cellular mechanisms for resolution is providing new windows into physiology and disease pathogenesis.
Collapse
Affiliation(s)
- Nandini Krishnamoorthy
- Pulmonary and Critical Care Medicine, Brigham and Women's Hospital and Harvard Medical School , Boston, Massachusetts ; and Department of Anesthesiology, Center for Experimental Therapeutics and Reperfusion Injury, Perioperative and Pain Medicine, Brigham and Women's Hospital and Harvard Medical School , Boston, Massachusetts
| | - Raja-Elie E Abdulnour
- Pulmonary and Critical Care Medicine, Brigham and Women's Hospital and Harvard Medical School , Boston, Massachusetts ; and Department of Anesthesiology, Center for Experimental Therapeutics and Reperfusion Injury, Perioperative and Pain Medicine, Brigham and Women's Hospital and Harvard Medical School , Boston, Massachusetts
| | - Katherine H Walker
- Pulmonary and Critical Care Medicine, Brigham and Women's Hospital and Harvard Medical School , Boston, Massachusetts ; and Department of Anesthesiology, Center for Experimental Therapeutics and Reperfusion Injury, Perioperative and Pain Medicine, Brigham and Women's Hospital and Harvard Medical School , Boston, Massachusetts
| | - Braden D Engstrom
- Pulmonary and Critical Care Medicine, Brigham and Women's Hospital and Harvard Medical School , Boston, Massachusetts ; and Department of Anesthesiology, Center for Experimental Therapeutics and Reperfusion Injury, Perioperative and Pain Medicine, Brigham and Women's Hospital and Harvard Medical School , Boston, Massachusetts
| | - Bruce D Levy
- Pulmonary and Critical Care Medicine, Brigham and Women's Hospital and Harvard Medical School , Boston, Massachusetts ; and Department of Anesthesiology, Center for Experimental Therapeutics and Reperfusion Injury, Perioperative and Pain Medicine, Brigham and Women's Hospital and Harvard Medical School , Boston, Massachusetts
| |
Collapse
|
13
|
Abstract
The Western world has witnessed a tremendous increase in the occurrence of allergy and autoimmunity in the second half of the 20th century. Extensive efforts have been made to explain this phenomenon and various hypotheses have been formulated. Among them, two concepts have attracted the most attention: the "hygiene hypothesis," identifying the reduced exposure to environmental microorganisms as a driving force behind the observed epidemiological trends; and the "diet hypotheses," pointing to the importance of changes in our dietary habits. In this review, we discuss the interplay between the Western diet, microbiota, and inflammatory conditions, with particular emphasis on respiratory diseases. This is followed by an in-depth overview of the immunomodulatory potential of different dietary fatty acids. We conclude by identifying the outstanding questions, which, if answered, could shed further light on the impact of dietary habits on immunity and interconnect it with postulates proposed by the hygiene hypothesis. Linking these two concepts will be an important step towards understanding how Western lifestyle shapes disease susceptibility.
Collapse
|
14
|
Morin C, Cantin AM, Vézina FA, Fortin S. The Efficacy of MAG-DHA for Correcting AA/DHA Imbalance of Cystic Fibrosis Patients. Mar Drugs 2018; 16:md16060184. [PMID: 29861448 PMCID: PMC6025526 DOI: 10.3390/md16060184] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 05/16/2018] [Accepted: 05/25/2018] [Indexed: 11/22/2022] Open
Abstract
Omega-3 polyunsaturated fatty acid (n-3 PUFA) supplementations are thought to improve essential fatty acid deficiency (EFAD) as well as reduce inflammation in Cystic Fibrosis (CF), but their effectiveness in clinical studies remains unknown. The aim of the study was to determine how the medical food containing docosahexaenoic acid monoglyceride (MAG-DHA) influenced erythrocyte fatty acid profiles and the expression levels of inflammatory circulating mediators. We conducted a randomized, double blind, pilot trial including fifteen outpatients with Cystic Fibrosis, ages 18–48. The patients were divided into 2 groups and received MAG-DHA or a placebo (sunflower oil) for 60 days. Patients took 8 × 625 mg MAG-DHA softgels or 8 × 625 mg placebo softgels every day at bedtime for 60 days. Lipid analyses revealed that MAG-DHA increased docosahexaenoic acid (DHA) levels and decrease arachidonic acid (AA) ratio (AA/DHA) in erythrocytes of CF patients following 1 month of daily supplementation. Data also revealed a reduction in plasma human leukocyte elastase (pHLE) complexes and interleukin-6 (IL-6) expression levels in blood samples of MAG-DHA supplemented CF patients. This pilot study indicates that MAG-DHA supplementation corrects erythrocyte AA/DHA imbalance and may exert anti-inflammatory properties through the reduction of pHLE complexes and IL6 in blood samples of CF patients. Trial registration: Pro-resolving Effect of MAG-DHA in Cystic Fibrosis (PREMDIC), NCT02518672.
Collapse
Affiliation(s)
- Caroline Morin
- SCF Pharma, 235, route du Fleuve Ouest, Ste-Luce, QC G0K 1P0, Canada.
| | - André M Cantin
- Department of Medicine, Respiratory Division, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada.
| | - Félix-Antoine Vézina
- Department of Medicine, Respiratory Division, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada.
| | - Samuel Fortin
- SCF Pharma, 235, route du Fleuve Ouest, Ste-Luce, QC G0K 1P0, Canada.
| |
Collapse
|
15
|
Yan Y, Wang Z, Wang D, Lawrence P, Wang X, Kothapalli KSD, Greenwald J, Liu R, Park HG, Brenna JT. BCFA-enriched vernix-monoacylglycerol reduces LPS-induced inflammatory markers in human enterocytes in vitro. Pediatr Res 2018; 83:874-879. [PMID: 29166379 DOI: 10.1038/pr.2017.297] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 11/08/2017] [Indexed: 01/28/2023]
Abstract
BackgroundExcess vernix caseosa produced by the fetal skin appears as particles suspended in the amniotic fluid in late gestation, is swallowed by the fetus, and is found throughout the newborn gastrointestinal tract as the first organisms are arriving to colonize the gut. Lipid-rich vernix contains an unusually high 29% branched chain fatty acids (BCFA). BCFAs reduce the incidence of necrotizing enterocolitis in an animal model, and were recently found predominantly in the sn-2 position of human milk triacylglycerols. Nothing is known about the influence of vernix BCFA on proinflammatory markers in human enterocytes.MethodsWe investigated the effect of vernix-monoacylglycerides (MAGs) (enriched with 30% BCFA) on interleukin (IL)-8 and NF-κB production in a human intestinal epithelial cell line (Caco-2). Caco-2 cells were pretreated with vernix-MAG or vernix-free fatty acid (FFA) prior to lipopolysaccharide (LPS) activation.ResultsBoth vernix-MAG and vernix-FFA increased cell BCFA and eliminated an LPS-induced 20% reduction in cell viability. In stimulated Caco-2 cells, vernix-MAG was more effective than vernix-FFA in suppressing IL-8 and NF-κB. Activated vernix-MAG-treated cells expressed less of the cell-surface Toll-like receptor4 (TLR-4) compared with controls.ConclusionThis is the first study to show the reduction of proinflammatory markers in human cells mediated by BCFA-MAG.
Collapse
Affiliation(s)
- Yuanyuan Yan
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, National Engineering Research Center for Functional Food, School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Zhen Wang
- Division of Nutritional Sciences, Cornell University, Ithaca, New York
| | - Donghao Wang
- Division of Nutritional Sciences, Cornell University, Ithaca, New York
| | - Peter Lawrence
- Division of Nutritional Sciences, Cornell University, Ithaca, New York
| | - Xingguo Wang
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, National Engineering Research Center for Functional Food, School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Kumar S D Kothapalli
- Department of Pediatrics, Dell Pediatric Research Institute, Dell Medical School, University of Texas at Austin, Austin, Texas
| | - Jacelyn Greenwald
- Division of Nutritional Sciences, Cornell University, Ithaca, New York
| | - Ruijie Liu
- Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, National Engineering Research Center for Functional Food, School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Hui Gyu Park
- Department of Pediatrics, Dell Pediatric Research Institute, Dell Medical School, University of Texas at Austin, Austin, Texas
| | - J Thomas Brenna
- Department of Pediatrics, Dell Pediatric Research Institute, Dell Medical School, University of Texas at Austin, Austin, Texas
| |
Collapse
|
16
|
Di X, Oskarsson JT, Omarsdottir S, Freysdottir J, Hardardottir I. Lipophilic fractions from the marine sponge Halichondria sitiens decrease secretion of pro-inflammatory cytokines by dendritic cells and decrease their ability to induce a Th1 type response by allogeneic CD4 + T cells. PHARMACEUTICAL BIOLOGY 2017; 55:2116-2122. [PMID: 28876152 PMCID: PMC6130455 DOI: 10.1080/13880209.2017.1373832] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
CONTEXT Halichondria (Halichondriidae) marine sponges contain components possessing various biological activities, but immunomodulation is not among the ones reported. OBJECTIVE This study evaluated the immunomodulatory effects of fractions/compounds from Halichondria sitiens Schmidt. MATERIALS AND METHODS Crude dichloromethane/methanol extracts of H. sitiens were subjected to various chromatographic techniques to obtain fractions/compounds with immunomodulatory activity, using bioassay-guided isolation. The effects of the fractions/compounds were determined by measuring secretion of cytokines and expression of surface molecules by dendritic cells (DCs) and their ability to stimulate and modify cytokine secretion by allogeneic CD4+ T cells. The bioactive fractions were chemically analyzed to identify the immunomodulatory constituents by 1D, 2D NMR, and HRMS data. RESULTS Several lipophilic fractions from H. sitiens at 10 μg/mL decreased secretion of the pro-inflammatory cytokines IL-12p40 and IL-6 by the DCs, with maximum inhibition being 64% and 25%, respectively. In addition, fractions B3b3F and B3b3J decreased the ability of DCs to induce T cell secretion of IFN-γ. Fraction B3b3 induced morphological changes in DCs, characterized by extreme elongation of dendrites and cell clustering. Chemical screening revealed the presence of glycerides and some minor unknown constituents in the biologically active fractions. One new glyceride, 2,3-dihydroxypropyl 2-methylhexadecanoate (1), was isolated from one fraction and two known compounds, 3-[(1-methoxyhexadecyl)oxy]propane-1,2-diol (2) and monoheptadecanoin (3), were identified in another, but none of them had immunomodulatory activity. DISCUSSION AND CONCLUSIONS These results demonstrate that several lipophilic fractions from H. sitiens have anti-inflammatory effects on DCs and decrease their ability to induce a Th1 type immune response.
Collapse
Affiliation(s)
- Xiaxia Di
- Faculty of Pharmaceutical Sciences, University of Iceland, Reykjavik, Iceland
- Department of Immunology, Landspitali – The National University Hospital of Iceland, Reykjavik, Iceland
| | - Jon T. Oskarsson
- Department of Immunology, Landspitali – The National University Hospital of Iceland, Reykjavik, Iceland
- Centre for Rheumatology Research, Landspitali – The National University Hospital of Iceland, Reykjavik, Iceland
- Faculty of Medicine, Biomedical Center, University of Iceland, Reykjavik, Iceland
| | | | - Jona Freysdottir
- Department of Immunology, Landspitali – The National University Hospital of Iceland, Reykjavik, Iceland
- Centre for Rheumatology Research, Landspitali – The National University Hospital of Iceland, Reykjavik, Iceland
- Faculty of Medicine, Biomedical Center, University of Iceland, Reykjavik, Iceland
| | - Ingibjorg Hardardottir
- Department of Immunology, Landspitali – The National University Hospital of Iceland, Reykjavik, Iceland
- Faculty of Medicine, Biomedical Center, University of Iceland, Reykjavik, Iceland
- CONTACT Ingibjorg HardardottirFaculty of Medicine, Biomedical Center, University of Iceland, Vatnsmyrarvegur 16, 101Reykjavik, Iceland
| |
Collapse
|
17
|
Therapeutic potential of omega-3 fatty acid-derived epoxyeicosanoids in cardiovascular and inflammatory diseases. Pharmacol Ther 2017; 183:177-204. [PMID: 29080699 DOI: 10.1016/j.pharmthera.2017.10.016] [Citation(s) in RCA: 142] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Numerous benefits have been attributed to dietary long-chain omega-3 polyunsaturated fatty acids (n-3 LC-PUFAs), including protection against cardiac arrhythmia, triglyceride-lowering, amelioration of inflammatory, and neurodegenerative disorders. This review covers recent findings indicating that a variety of these beneficial effects are mediated by "omega-3 epoxyeicosanoids", a class of novel n-3 LC-PUFA-derived lipid mediators, which are generated via the cytochrome P450 (CYP) epoxygenase pathway. CYP enzymes, previously identified as arachidonic acid (20:4n-6; AA) epoxygenases, accept eicosapentaenoic acid (20:5n-3; EPA) and docosahexaenoic acid (22:6n-3; DHA), the major fish oil n-3 LC-PUFAs, as efficient alternative substrates. In humans and rodents, dietary EPA/DHA supplementation causes a profound shift of the endogenous CYP-eicosanoid profile from AA- to EPA- and DHA-derived metabolites, increasing, in particular, the plasma and tissue levels of 17,18-epoxyeicosatetraenoic acid (17,18-EEQ) and 19,20-epoxydocosapentaenoic acid (19,20-EDP). Based on preclinical studies, these omega-3 epoxyeicosanoids display cardioprotective, vasodilatory, anti-inflammatory, and anti-allergic properties that contribute to the beneficial effects of n-3 LC-PUFAs in diverse disease conditions ranging from cardiac disease, bronchial disorders, and intraocular neovascularization, to allergic intestinal inflammation and inflammatory pain. Increasing evidence also suggests that background nutrition as well as genetic and disease state-related factors could limit the response to EPA/DHA-supplementation by reducing the formation and/or enhancing the degradation of omega-3 epoxyeicosanoids. Recently, metabolically robust synthetic analogs mimicking the biological activities of 17,18-EEQ have been developed. These drug candidates may overcome limitations of dietary EPA/DHA supplementation and provide novel options for the treatment of cardiovascular and inflammatory diseases.
Collapse
|
18
|
Wypych TP, Marsland BJ. Diet Hypotheses in Light of the Microbiota Revolution: New Perspectives. Nutrients 2017; 9:nu9060537. [PMID: 28538698 PMCID: PMC5490516 DOI: 10.3390/nu9060537] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 05/12/2017] [Accepted: 05/19/2017] [Indexed: 02/06/2023] Open
Abstract
From an evolutionary standpoint, allergy has only recently emerged as a significant health problem. Various hypotheses were proposed to explain this, but they all indicated the importance of rapid lifestyle changes, which occurred in industrialized countries in the last few decades. In this review, we discuss evidence from epidemiological and experimental studies that indicate changes in dietary habits may have played an important role in this phenomenon. Based on the example of dietary fiber, we discuss molecular mechanisms behind this and point towards the importance of diet-induced changes in the microbiota. Finally, we reason that future studies unraveling mechanisms governing these changes, along with the development of better tools to manipulate microbiota composition in individuals will be crucial for the design of novel strategies to combat numerous inflammatory disorders, including atopic diseases.
Collapse
Affiliation(s)
- Tomasz P Wypych
- Faculty of Biology and Medicine, University of Lausanne, Service de Pneumologie, CHUV, Epalinges 1066, Switzerland.
| | - Benjamin J Marsland
- Faculty of Biology and Medicine, University of Lausanne, Service de Pneumologie, CHUV, Epalinges 1066, Switzerland.
| |
Collapse
|
19
|
Morin C, Charbonneau L, Ouellet N, Ouellet H, Blier PU, Dufresne F, Fortin S. Eicosapentaenoic acid monoglyceride resolves inflammation in an ex vivo model of human peripheral blood mononuclear cell. Eur J Pharmacol 2017; 807:205-211. [PMID: 28501579 DOI: 10.1016/j.ejphar.2017.05.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Revised: 05/04/2017] [Accepted: 05/10/2017] [Indexed: 11/24/2022]
Abstract
Phosphorylation and activation of p38 MAPK and NFκB pathways, along with the resulting overproduction of interleukin IL-1β, IL-6, and tumor necrosis factor a (TNFα) is a hallmark of inflammatory disorders. Omega-3 polyunsaturated fatty acid (n-3 PUFA) supplementations are known to exert anti-inflammatory properties by reduction of keys cytokines and enzymes involved in inflammation. Here, we investigated the anti-inflammatory pathways and mediators modulated by eicosapentaenoic acid monoglyceride (MAG-EPA) on human peripheral blood mononuclear cells (PBMCs) from healthy donors and stimulated, ex vivo, with lipopolysaccharide (LPS). LPS stimulation increased p38 MAPK and NFκB phosphorylation, which was abolished by MAG-EPA treatments. Concomitantly, MAG-EPA also abolished LPS-induced inflammation in PBMCs by reducing IL-1β, IL-6, and TNFα cytokines at protein and transcript levels. Moreover, MAG-EPA decreased the levels of HIF1α in LPS-induced human PBMCs. Results also revealed a decreased of pro-inflammatory enzymes such as Cyclooxygenase-2 (COX-2) and 5-lipoxygenase (5-LOX) in LPS-induced PBMCs. Altogether, the present data suggest that MAG-EPA, represents a new potential therapeutic strategy for resolving inflammation in inflammatory disorders including autoimmune diseases, allergies, asthma, arthritis and cancer.
Collapse
Affiliation(s)
| | - Léane Charbonneau
- Départment de Sciences infirmières, Université du Québec à Rimouski, Rimouski, QC, Canada
| | - Nicole Ouellet
- Départment de Sciences infirmières, Université du Québec à Rimouski, Rimouski, QC, Canada
| | - Hélène Ouellet
- Départment de Sciences infirmières, Université du Québec à Rimouski, Rimouski, QC, Canada
| | - Pierre U Blier
- Départment de Biologie, Université du Québec à Rimouski, Rimouski, QC, Canada
| | - France Dufresne
- Départment de Biologie, Université du Québec à Rimouski, Rimouski, QC, Canada
| | - Samuel Fortin
- SCF Pharma, Ste-Luce, QC, Canada; Départment de Biologie, Université du Québec à Rimouski, Rimouski, QC, Canada.
| |
Collapse
|
20
|
Khaddaj-Mallat R, Sirois C, Sirois M, Rizcallah E, Marouan S, Morin C, Rousseau É. Pro-Resolving Effects of Resolvin D2 in LTD4 and TNF-α Pre-Treated Human Bronchi. PLoS One 2016; 11:e0167058. [PMID: 27935998 PMCID: PMC5148597 DOI: 10.1371/journal.pone.0167058] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Accepted: 11/08/2016] [Indexed: 12/12/2022] Open
Abstract
Inflammation is a major burden in respiratory diseases, resulting in airway hyperresponsiveness. Our hypothesis is that resolution of inflammation may represent a long-term solution in preventing human bronchial dysfunctions. The aim of the present study was to assess the anti-inflammatory effects of RvD2, a member of the D-series resolving family, with concomitant effects on ASM mechanical reactivity. The role and mode of action of RvD2 were assessed in an in vitro model of human bronchi under pro-inflammatory conditions, induced either by 1 μM LTD4 or 10 ng/ml TNF-α pre-treatment for 48h. TNF-α and LTD4 both induced hyperreactivity in response to pharmacological stimuli. Enhanced 5-Lipoxygenase (5-LOX) and cysteinyl leukotriene receptor 1 (CysLTR1) detection was documented in LTD4 or TNF-α pre-treated human bronchi when compared to control (untreated) human bronchi. In contrast, RvD2 treatments reversed 5-LOX/β-actin and CysLTR1/β-actin ratios and decreased the phosphorylation levels of AP-1 subunits (c-Fos, c-Jun) and p38-MAP kinase, while increasing the detection of the ALX/FPR2 receptor. Moreover, various pharmacological agents revealed the blunting effects of RvD2 on LTD4 or TNF-α induced hyper-responsiveness. Combined treatment with 300 nM RvD2 and 1 μM WRW4 (an ALX/FPR2 receptor inhibitor) blunted the pro-resolving and broncho-modulatory effects of RvD2. The present data provide new evidence regarding the role of RvD2 in a human model of airway inflammation and hyperrresponsiveness.
Collapse
Affiliation(s)
- Rayan Khaddaj-Mallat
- Department of Obstetrics-Gynecology Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Chantal Sirois
- Service of Thoracic Surgery, CHUS Felurimont, Sherbrooke, Quebec, Canada
| | - Marco Sirois
- Service of Thoracic Surgery, CHUS Felurimont, Sherbrooke, Quebec, Canada
| | - Edmond Rizcallah
- Department of Pathology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Sofia Marouan
- Department of Pathology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Caroline Morin
- Nursery School, Université de Montréal, Montreal, Quebec, Canada
| | - Éric Rousseau
- Department of Obstetrics-Gynecology Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Quebec, Canada
- * E-mail:
| |
Collapse
|
21
|
Novel n-3 PUFA monoacylglycerides of pharmacological and medicinal interest: Anti-inflammatory and anti-proliferative effects. Eur J Pharmacol 2016; 792:70-77. [PMID: 27818127 DOI: 10.1016/j.ejphar.2016.10.038] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 09/26/2016] [Accepted: 10/31/2016] [Indexed: 12/25/2022]
Abstract
Newly-synthesized, eicosapentaenoic acid monoacylglyceride (MAG-EPA), docosahexaenoic acid monoacylglyceride (MAG-DHA) and docosapentaenoic acid monoacylglyceride (MAG-DPA) have been demonstrated to display beneficial effects in several disorders including chronic airway inflammatory diseases, pulmonary hypertension, rheumatoid arthritis, and lung and colorectal adenocarcinoma. Recent evidence reveals that omega-3 polyunsaturated fatty acid (n-3 PUFA) precursors provide a window to explore the pathobiology of inflammatory disease as well as structural templates for the design of novel pro-resolving precursors that are well absorbed by the gastrointestinal (GI) tract and metabolized into bioactive metabolites. These metabolites are found in blood circulation and tissues thereby mediating numerous immuno-modulatory effects through the activation of specific receptors. Bioactive metabolites regulate cell membrane functions, lipid signaling and gene expressions encoding for enzymes responsible for lipid storage and fatty acid metabolism. This review highlights recent experimental findings regarding n-3 PUFA monoacylglyceride research, as well as the pharmacological and medicinal relevance of these stereospecific derivatives in the resolution of chronic inflammatory diseases.
Collapse
|
22
|
Morin C, Blier PU, Fortin S. MAG-EPA reduces severity of DSS-induced colitis in rats. Am J Physiol Gastrointest Liver Physiol 2016; 310:G808-21. [PMID: 27012773 DOI: 10.1152/ajpgi.00136.2015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Accepted: 03/16/2016] [Indexed: 01/31/2023]
Abstract
Ulcerative colitis (UC) is a chronic disease characterized by diffuse inflammation of the intestinal mucosa of the large bowel. Omega-3 (ω3) fatty acid supplementation has been associated with a decreased production of inflammatory cytokines involved in UC pathogenesis. The aim of this study was to determine the preventive and therapeutic potential of eicosapentaenoic acid monoglyceride (MAG-EPA) in an in vivo rats model of UC induced by dextran sulfate sodium (DSS). DSS rats were untreated or treated per os with MAG-EPA. Morphological, histological, and biochemical analyses were performed following MAG-EPA administrations. Morphological and histological analyses revealed that MAG-EPA pretreatment (12 days pre-DSS) and treatment (6 days post-DSS) exhibited strong activity in reducing severity of disease in DSS rats. Following MAG-EPA administrations, tissue levels of the proinflammatory cytokines TNF-α, IL-1β, and IL-6 were markedly lower compared with rats treated only with DSS. MAG-EPA per os administration decrease neutrophil infiltration in colon tissues, as depicted by myelohyperoxidase activity. Results also revealed a reduced activation of NF-κB pathways correlated with a decreased expression of COX-2 in colon homogenates derived from MAG-EPA-pretreated and treated rats. Tension measurements performed on colon tissues revealed that contractile responses to methacholine and relaxing effect induced by sodium nitroprusside were largely increased following MAG-EPA treatment. The combined treatment of MAG-EPA and vitamin E displayed an antagonistic effect on anti-inflammatory properties of MAG-EPA in DSS rats.
Collapse
Affiliation(s)
- Caroline Morin
- SCF Pharma, Ste-Luce, Quebec, Canada; Department of Physiology and Biophysics, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Quebec, Canada; and
| | - Pierre U Blier
- Department of Biology, Université du Québec à Rimouski, Rimouski, Quebec, Canada
| | - Samuel Fortin
- SCF Pharma, Ste-Luce, Quebec, Canada; Department of Biology, Université du Québec à Rimouski, Rimouski, Quebec, Canada
| |
Collapse
|
23
|
Morin C, Cantin AM, Rousseau É, Sirois M, Sirois C, Rizcallah E, Fortin S. Proresolving Action of Docosahexaenoic Acid Monoglyceride in Lung Inflammatory Models Related to Cystic Fibrosis. Am J Respir Cell Mol Biol 2015; 53:574-83. [PMID: 25781052 DOI: 10.1165/rcmb.2014-0223oc] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Cystic fibrosis (CF) is a hereditary, chronic disease of the exocrine glands, characterized by the production of viscid mucus that obstructs the pancreatic ducts and bronchi, leading to infection and fibrosis. ω3 fatty acid supplementations are known to improve the essential fatty acid deficiency as well as reduce inflammation in CF. The objective of this study was to determine the effects of docosahexaenoic acid monoacylglyceride (MAG-DHA) on mucin overproduction and resolution of airway inflammation in two in vitro models related to CF. Isolated human bronchi reverse permeabilized with CF transmembrane conductance regulator (CFTR) silencing (si) RNA and stable Calu3 cells expressing a short hairpin (sh) RNA directed against CFTR (shCFTR) were used. Lipid analyses revealed that MAG-DHA increased DHA/arachidonic acid (AA) ratio in shCFTR Calu-3 cells. MAG-DHA treatments, moreover, resulted in a decreased activation of Pseudomonas aeruginosa LPS-induced NF-κB in CF and non-CF Calu-3 cells. Data also revealed a reduction in MUC5AC, IL-6, and IL-8 expression levels in MAG-DHA-treated shCFTR cells stimulated, or not, with LPS. Antiinflammatory properties of MAG-DHA were also investigated in a reverse-permeabilized human bronchi model with CFTR siRNA. After MAG-DHA treatments, messenger RNA transcript levels for MUC5AC, IL-6, and IL-8 were markedly reduced in LPS-treated CFTR siRNA bronchi. MAG-DHA displays antiinflammatory properties and reduces mucin overexpression in Calu-3 cells and human bronchi untreated or treated with P. aeruginosa LPS, a finding consistent with the effects of resolvinD1, a known antiinflammatory mediator.
Collapse
Affiliation(s)
- Caroline Morin
- 1 SCF Pharma, Ste-Luce, Quebec, Canada; and.,Departments of 2 Physiology and Biophysics, Faculty of Medicine and Health Sciences
| | | | - Éric Rousseau
- Departments of 2 Physiology and Biophysics, Faculty of Medicine and Health Sciences
| | - Marco Sirois
- 4 Thoracic Surgery, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Chantal Sirois
- 4 Thoracic Surgery, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | | | | |
Collapse
|
24
|
Auger L, Mailhot-Larouche S, Tremblay F, Poirier M, Farah C, Bossé Y. The contractile lability of smooth muscle in asthmatic airway hyperresponsiveness. Expert Rev Respir Med 2015; 10:19-27. [PMID: 26561333 DOI: 10.1586/17476348.2016.1111764] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The contractile capacity of airway smooth muscle is not fixed but modulated by an impressive number of extracellular inflammatory mediators. Targeting the transient component of airway hyperresponsiveness ascribed to this contractile lability of ASM is a quest of great promises in order to alleviate asthma symptoms during inflammatory flares. However, owing to the plethora of mediators putatively involved and the molecular heterogeneity of asthma, it is more likely that many mediators conspire to increase the contractile capacity of ASM, each of which contributing to a various extent and in a time-varying fashion in individuals suffering from asthma. The task of identifying a common mend for a tissue rendered hypercontractile by imponderable assortments of inflammatory mediators is puzzling.
Collapse
Affiliation(s)
- Laurence Auger
- a Institut Universitaire de Cardiologie et de Pneumologie de Québec , Université Laval , Québec , Canada
| | - Samuel Mailhot-Larouche
- a Institut Universitaire de Cardiologie et de Pneumologie de Québec , Université Laval , Québec , Canada
| | - Francis Tremblay
- a Institut Universitaire de Cardiologie et de Pneumologie de Québec , Université Laval , Québec , Canada
| | - Mathilde Poirier
- a Institut Universitaire de Cardiologie et de Pneumologie de Québec , Université Laval , Québec , Canada
| | - Claude Farah
- a Institut Universitaire de Cardiologie et de Pneumologie de Québec , Université Laval , Québec , Canada
| | - Ynuk Bossé
- a Institut Universitaire de Cardiologie et de Pneumologie de Québec , Université Laval , Québec , Canada
| |
Collapse
|
25
|
Reversal of IL-13-induced inflammation and Ca2+ sensitivity by resolvin and MAG-DHA in association with ASA in human bronchi. Prostaglandins Other Lipid Mediat 2015; 121:145-54. [DOI: 10.1016/j.prostaglandins.2015.04.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Revised: 04/02/2015] [Accepted: 04/14/2015] [Indexed: 01/03/2023]
|
26
|
Morin C, Rousseau E, Blier PU, Fortin S. Effect of docosahexaenoic acid monoacylglyceride on systemic hypertension and cardiovascular dysfunction. Am J Physiol Heart Circ Physiol 2015; 309:H93-H102. [DOI: 10.1152/ajpheart.00823.2014] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Accepted: 04/18/2015] [Indexed: 02/05/2023]
Abstract
ω-3 Fatty acid supplementation has been associated with lower blood pressure. Cardiovascular diseases are also known to be linked directly to an increase in ω-6 and a reduction in ω-3 fatty acid levels in blood circulation and tissues. To determine the effect of docosahexaenoic acid monoglycerides (MAG-DHA) on blood pressure, lipid profiles, and vascular remodeling in rats fed a high-fat/high-carbohydrate (HFHC) diet. Studies were performed in male rats subjected to 8 wk of HFHC diet supplemented or not with 3 g/day MAG-DHA. After 8 wk of daily MAG-DHA treatment, rats in the HFHC + MAG-DHA group had lower arterial blood pressure and heart rate compared with the HFHC group. Moreover, MAG-DHA prevented the increase aortic wall thickness, whereas lipid analysis of aortic tissues revealed an increase in DHA/AA ratio correlated with the production of resolvin D2 and D3 metabolites. Histological analysis revealed that MAG-DHA prevented the development of LVH in the HFHC group. Serum lipid profile analysis further showed a decrease in total cholesterol (TC) and LDL, including very low-density lipoprotein (VLDL) and triglyceride (TG) levels, together with an increase in HDL levels after 8 wk of MAG-DHA treatment compared with the HFHC group. Furthermore, daily MAG-DHA treatment resulted in reduced proinflammatory marker levels such as CRP, IL-6, TNFα, and IL-1β. Altogether, these findings revealed that per os administration of MAG-DHA prevents HFHC-diet induced hypertension and LVH in rats.
Collapse
Affiliation(s)
- Caroline Morin
- SCF Pharma, Sainte-Luce, Quebec, Canada
- Department of Physiology and Pharmacology, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Eric Rousseau
- Department of Obstetric Gynecology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Quebec, Canada, and
| | - Pierre U. Blier
- Department of Biology, Université du Québec à Rimouski, Rimouski, Quebec, Canada
| | - Samuel Fortin
- SCF Pharma, Sainte-Luce, Quebec, Canada
- Department of Biology, Université du Québec à Rimouski, Rimouski, Quebec, Canada
| |
Collapse
|
27
|
Morin C, Blier PU, Fortin S. Eicosapentaenoic acid and docosapentaenoic acid monoglycerides are more potent than docosahexaenoic acid monoglyceride to resolve inflammation in a rheumatoid arthritis model. Arthritis Res Ther 2015; 17:142. [PMID: 26022389 PMCID: PMC4624173 DOI: 10.1186/s13075-015-0653-y] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Accepted: 05/12/2015] [Indexed: 12/20/2022] Open
Abstract
INTRODUCTION Rheumatoid arthritis (RA) is a chronic inflammatory autoimmune disease of the joints and bones. Omega-3 (ω3) fatty acid supplementation has been associated with a decreased production of inflammatory cytokines and eicosanoids involved in RA pathogenesis. The aim of this study was to determine the therapeutic potential of ω3 monoglyceride (MAG-ω3) compounds in an in vivo rat model of RA induced by Complete Freund's Adjuvant (CFA). METHOD CFA rats were untreated or treated per os with three specific compounds, namely, MAG-docosahexaenoic acid (MAG-DHA), MAG-eicosapentaenoic acid (MAG-EPA) and MAG-docosapentaenoic acid (MAG-DPA). Morphological and histological analyses, as well as pro-inflammatory marker levels were determined following MAG-ω3 treatments. RESULTS Morphological and histological analyses revealed that MAG-EPA and MAG-DPA exhibited strong activity in reducing the progression and severity of arthritic disease in CFA rats. Following MAG-EPA and MAG-DPA treatments, plasma levels of the pro-inflammatory cytokines; interleukin 17A (IL-17A), IL-1β, IL-6 and tumor necrosis factor α (TNFα) were markedly lower when compared to CFA-untreated rats. Results also revealed a decreased activation of p38 mitogen-activated protein kinases (p38 MAPK) and nuclear factor-kappa B (NFκB) pathways correlated with a reduced expression of TNFα, cyclooxygenase-2 (COX-2), matrix metalloproteinase-2 (MMP-2) and MMP-9 in paw homogenates derived from MAG-EPA and MAG-DPA-treated rats. Of interest, the combined treatment of MAG-EPA and vitamin E displayed an antagonistic effect on anti-inflammatory properties of MAG-EPA in CFA rats. CONCLUSION Altogether, the present data suggest that MAG-EPA, without vitamin E, represents a new potential therapeutic strategy for resolving inflammation in arthritis.
Collapse
Affiliation(s)
- Caroline Morin
- SCF Pharma, 235, route du Fleuve Ouest, Ste-Luce, QC, G0K 1P0, Canada. .,Department of Pharmacology-Physiology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada.
| | - Pierre U Blier
- Department of Biology, Université du Québec à Rimouski, Rimouski, QC, Canada.
| | - Samuel Fortin
- SCF Pharma, 235, route du Fleuve Ouest, Ste-Luce, QC, G0K 1P0, Canada. .,Department of Biology, Université du Québec à Rimouski, Rimouski, QC, Canada.
| |
Collapse
|
28
|
Cantin AM, Hartl D, Konstan MW, Chmiel JF. Inflammation in cystic fibrosis lung disease: Pathogenesis and therapy. J Cyst Fibros 2015; 14:419-30. [PMID: 25814049 DOI: 10.1016/j.jcf.2015.03.003] [Citation(s) in RCA: 315] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Revised: 03/08/2015] [Accepted: 03/08/2015] [Indexed: 11/16/2022]
Abstract
Lung disease is the major cause of morbidity and mortality in patients with cystic fibrosis (CF). Although CF lung disease is primarily an infectious disorder, the associated inflammation is both intense and ineffective at clearing pathogens. Persistent high-intensity inflammation leads to permanent structural damage of the CF airways and impaired lung function that eventually results in respiratory failure and death. Several defective inflammatory responses have been linked to cystic fibrosis transmembrane conductance regulator (CFTR) deficiency including innate and acquired immunity dysregulation, cell membrane lipid abnormalities, various transcription factor signaling defects, as well as altered kinase and toll-like receptor responses. The inflammation of the CF lung is dominated by neutrophils that release oxidants and proteases, particularly elastase. Neutrophil elastase in the CF airway secretions precedes the appearance of bronchiectasis, and correlates with lung function deterioration and respiratory exacerbations. Anti-inflammatory therapies are therefore of particular interest for CF lung disease but must be carefully studied to avoid suppressing critical elements of the inflammatory response and thus worsening infection. This review examines the role of inflammation in the pathogenesis of CF lung disease, summarizes the results of past clinical trials and explores promising new anti-inflammatory options.
Collapse
Affiliation(s)
- André M Cantin
- Pulmonary Division, University of Sherbrooke, 3001, 12th Avenue North, Sherbrooke, QC, Canada.
| | - Dominik Hartl
- CF Center, Children's Hospital of the University of Tübingen, Tübingen, Germany
| | - Michael W Konstan
- Rainbow Babies and Children's Hospital, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - James F Chmiel
- Rainbow Babies and Children's Hospital, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| |
Collapse
|
29
|
Kanagaratham C, Kalivodová A, Najdekr L, Friedecký D, Adam T, Hajduch M, De Sanctis JB, Radzioch D. Fenretinide prevents inflammation and airway hyperresponsiveness in a mouse model of allergic asthma. Am J Respir Cell Mol Biol 2015; 51:783-92. [PMID: 24885263 DOI: 10.1165/rcmb.2014-0121oc] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Arachidonic acid (AA) and docosahexaenoic acid (DHA) play important roles in inflammation and disease progression, where AA is viewed as proinflammatory and DHA as antiinflammatory. We observe in our model of allergic asthma that the AA/DHA ratio is significantly skewed in a proinflammatory direction. Fenretinide, a vitamin A derivative, has been shown to correct fatty acid imbalances in other diseases. Therefore, we explored if fenretinide can have a protective effect in allergic asthma. To accomplish this, we measured the levels of AA and DHA in the lungs of nonallergic, ovalbumin-induced allergic, and fenretinide-treated allergic mice. We also investigated the effect of allergic asthma and fenretinide treatment on markers of oxidative stress, levels of metabolites, IgE production, airway hyperresponsiveness, and histological changes. Our data demonstrate that treatment of allergen-sensitized mice with fenretinide before allergen challenge prevents ovalbumin-induced changes in the AA/DHA ratio. The levels of several metabolites, such as serotonin, and markers of cellular stress, which are increased after ovalbumin challenge, are also controlled by fenretinide treatment. We observed the protective effect of fenretinide against ovalbumin-induced airway hyperresponsiveness and inflammation in the lungs, illustrated by a complete block in the infiltration of inflammatory cells to the airways and dramatically diminished goblet cell proliferation, even though IgE remained high. Our results demonstrate that fenretinide is an effective agent targeting inflammation, oxidation, and lung pathology observed in allergic asthma.
Collapse
|
30
|
Miyata J, Arita M. Role of omega-3 fatty acids and their metabolites in asthma and allergic diseases. Allergol Int 2015; 64:27-34. [PMID: 25572556 DOI: 10.1016/j.alit.2014.08.003] [Citation(s) in RCA: 144] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Revised: 08/20/2014] [Accepted: 08/21/2014] [Indexed: 12/19/2022] Open
Abstract
Omega-3 fatty acids, docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA), are found naturally in fish oil and are commonly thought to be anti-inflammatory nutrients, with protective effects in inflammatory diseases including asthma and allergies. The mechanisms of these effects remain mostly unknown but are of great interest for their potential therapeutic applications. Large numbers of epidemiological and observational studies investigating the effect of fish intake or omega-3 fatty acid supplementation during pregnancy, lactation, infancy, childhood, and adulthood on asthmatic and allergic outcomes have been conducted. They mostly indicate protective effects and suggest a causal relationship between decreased intake of fish oil in modernized diets and an increasing number of individuals with asthma or other allergic diseases. Specialized pro-resolving mediators (SPM: protectins, resolvins, and maresins) are generated from omega-3 fatty acids such as EPA and DHA via several enzymatic reactions. These mediators counter-regulate airway eosinophilic inflammation and promote the resolution of inflammation in vivo. Several reports have indicated that the biosynthesis of SPM is impaired, especially in severe asthma, which suggests that chronic inflammation in the lung might result from a resolution defect. This article focuses on the beneficial aspects of omega-3 fatty acids and offers recent insights into their bioactive metabolites including resolvins and protectins.
Collapse
|
31
|
Tremblay H, St-Georges C, Legault MA, Morin C, Fortin S, Marsault E. One-pot synthesis of polyunsaturated fatty acid amides with anti-proliferative properties. Bioorg Med Chem Lett 2014; 24:5635-5638. [DOI: 10.1016/j.bmcl.2014.10.084] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Revised: 10/24/2014] [Accepted: 10/27/2014] [Indexed: 10/24/2022]
|
32
|
Schuster GU, Bratt JM, Jiang X, Pedersen TL, Grapov D, Adkins Y, Kelley DS, Newman JW, Kenyon NJ, Stephensen CB. Dietary long-chain omega-3 fatty acids do not diminish eosinophilic pulmonary inflammation in mice. Am J Respir Cell Mol Biol 2014; 50:626-36. [PMID: 24134486 PMCID: PMC4068931 DOI: 10.1165/rcmb.2013-0136oc] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Accepted: 10/07/2013] [Indexed: 12/30/2022] Open
Abstract
Although the effects of fish oil supplements on airway inflammation in asthma have been studied with varying results, the independent effects of the fish oil components, eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), administered separately, are untested. Here, we investigated airway inflammation and hyperresponsiveness using a mouse ovalbumin exposure model of asthma assessing the effects of consuming EPA (1.5% wt/wt), DHA (1.5% wt/wt), EPA plus DHA (0.75% each), or a control diet with no added omega-3 polyunsaturated fatty acids. Consuming these diets for 6 weeks resulted in erythrocyte membrane EPA contents (molar %) of 9.0 (± 0.6), 3.2 (± 0.2), 6.8 (± 0.5), and 0.01 (± 0.0)%; DHA contents were 6.8 (± 0.1), 15.6 (± 0.5), 12.3 (± 0.3), and 3.8 (± 0.2)%, respectively. The DHA group had the highest bronchoalveolar lavage (BAL) fluid eosinophil and IL-6 levels (P < 0.05). Similar trends were seen for macrophages, IL-4, and IL-13, whereas TNF-α was lower in omega-3 polyunsaturated fatty acid groups than the control (P < 0.05). The DHA group also had the highest airway resistance, which differed significantly from the EPA plus DHA group (P < 0.05), which had the lowest. Oxylipins were measured in plasma and BAL fluid, with DHA and EPA suppressing arachidonic acid-derived oxylipin production. DHA-derived oxylipins from the cytochrome P450 and 15-lipoxygenase pathways correlated significantly with BAL eosinophil levels. The proinflammatory effects of DHA suggest that the adverse effects of individual fatty acid formulations should be thoroughly considered before any use as therapeutic agents in asthma.
Collapse
Affiliation(s)
- Gertrud U. Schuster
- United States Department of Agriculture (USDA), Agricultural Research Service (ARS), Western Human Nutrition Research Center, Immunity and Disease Prevention Unit, Davis, California
- Nutrition Department, University of California, Davis, California
| | - Jennifer M. Bratt
- Division of Pulmonary and Critical Care Medicine, University of California, Davis, California; and
| | - Xiaowen Jiang
- United States Department of Agriculture (USDA), Agricultural Research Service (ARS), Western Human Nutrition Research Center, Immunity and Disease Prevention Unit, Davis, California
| | - Theresa L. Pedersen
- USDA, ARS, Western Human Nutrition Research Center, Obesity and Metabolism Research Prevention, Davis, California
| | - Dmitry Grapov
- Nutrition Department, University of California, Davis, California
| | - Yuriko Adkins
- United States Department of Agriculture (USDA), Agricultural Research Service (ARS), Western Human Nutrition Research Center, Immunity and Disease Prevention Unit, Davis, California
| | - Darshan S. Kelley
- United States Department of Agriculture (USDA), Agricultural Research Service (ARS), Western Human Nutrition Research Center, Immunity and Disease Prevention Unit, Davis, California
- Nutrition Department, University of California, Davis, California
| | - John W. Newman
- Nutrition Department, University of California, Davis, California
- USDA, ARS, Western Human Nutrition Research Center, Obesity and Metabolism Research Prevention, Davis, California
| | - Nicholas J. Kenyon
- Division of Pulmonary and Critical Care Medicine, University of California, Davis, California; and
| | - Charles B. Stephensen
- United States Department of Agriculture (USDA), Agricultural Research Service (ARS), Western Human Nutrition Research Center, Immunity and Disease Prevention Unit, Davis, California
- Nutrition Department, University of California, Davis, California
| |
Collapse
|
33
|
Corriveau S, Berthiaume M, Girard I, Nolin MA, Rousseau E, Pasquier JC. Effect of cytochrome P-450 epoxygenase and hydroxylase metabolites on rat myometrium contractility in non-pregnancy, late pregnancy and late pregnancy under inflammatory conditions. J Obstet Gynaecol Res 2013; 40:661-9. [PMID: 24321039 DOI: 10.1111/jog.12247] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Accepted: 07/22/2013] [Indexed: 12/18/2022]
Abstract
AIM The aim of the present experimental study was to assess the tocolytic effect of eicosanoids on myometrium from non-pregnant and pregnant rats with or without an induced inflammatory condition. METHODS Three hundred myometrial rings were obtained by median laparotomy from 50 Sprague-Dawley rats divided into three groups: (i) non-pregnant (n = 15); (ii) pregnant in absence (n = 20); or (iii) pregnant in presence (n = 15) of lipopolysaccharide treatment, timed at 22 days of pregnancy. Spontaneous contractile activities were compared by isometric tension measurements. The effects of epoxy- and hydroxyeicosanoids derived from arachidonic acid as well as specific enzyme inhibitors were assessed. Changes were expressed as percentage of basal activity by calculating the area under the curve as a function of drug concentration and compared to the effect of the vehicle. RESULTS A decrease in contractile activity ranging 10-25% was observed upon addition of epoxy- and hydroxyeicosanoids. Increasing epoxyeicosanoid bioavailability by inhibiting their degradation induced a tocolytic effect in the non-pregnant group (20%) and in inflammation-induced condition (40%). There was a significant difference in reactivity between groups and pregnancy condition. Semiquantification of metabolic enzymes that produce (cytochrome P-450 epoxygenase) and degrade (soluble epoxide hydrolase) epoxyeicosanoids by western blot analysis revealed that these enzymes were mainly detected in the non-pregnant group. CONCLUSION Eicosanoids can modify myometrial reactivity and their presence and effects are amplified in non-pregnant and in inflammation-induced condition. Our data suggest that in contrast to prostaglandins, epoxyeicosatrienoic acids are likely involved in the quiescence phase of parturition because they reduce the rhythmic contractile activity of uterine tissues in pregnant rats.
Collapse
Affiliation(s)
- Stéphanie Corriveau
- Obstetrics and Gynecology, CRC E-Lebel - CHUS, Sherbrooke, Quebec, Canada; Physiology and Biophysics, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | | | | | | | | | | |
Collapse
|
34
|
Morin C, Fortin S, Cantin AM, Rousseau É. MAG-EPA resolves lung inflammation in an allergic model of asthma. Clin Exp Allergy 2013; 43:1071-82. [DOI: 10.1111/cea.12162] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Revised: 06/12/2013] [Accepted: 06/14/2013] [Indexed: 01/13/2023]
Affiliation(s)
| | | | - A. M. Cantin
- Department of Medicine; Respiratory Division; Université de Sherbrooke; Sherbrooke; QC; Canada
| | - É. Rousseau
- Department of Physiology and Biophysics; Faculty of Medicine and Health Sciences; Sherbrooke; QC; Canada
| |
Collapse
|
35
|
Klil-Drori AJ, Ariel A. 15-Lipoxygenases in cancer: a double-edged sword? Prostaglandins Other Lipid Mediat 2013; 106:16-22. [PMID: 23933488 DOI: 10.1016/j.prostaglandins.2013.07.006] [Citation(s) in RCA: 215] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Revised: 07/11/2013] [Accepted: 07/30/2013] [Indexed: 11/26/2022]
Abstract
Among the lipoxygenases, a diverse family of fatty acid dioxygenases with varying tissue-specific expression, 15-lipoxygenase (15-LOX) was found to be involved in many aspects of human cancer, such as angiogenesis, chronic inflammation, metastasis formation, and direct and indirect tumor suppression. Herein, evidence for the expression and action of 15-LOX and its orthologs in various neoplasms, including solid tumors and hematologic malignancies, is reviewed. The debate surrounding the impact of 15-LOX as either a tumor-promoting or a tumor-suppressing enzyme is highlighted and discussed in the context of its role in other biological systems.
Collapse
Affiliation(s)
- Adi J Klil-Drori
- Department of Hematology and Bone Marrow Transplantation, Rambam Health Care Campus, P.O. Box 9602, Haifa 31096, Israel
| | | |
Collapse
|
36
|
Smooth muscle hypercontractility in airway hyperresponsiveness: innate, acquired, or nonexistent? J Allergy (Cairo) 2013; 2013:938046. [PMID: 23843801 PMCID: PMC3703427 DOI: 10.1155/2013/938046] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Accepted: 02/21/2013] [Indexed: 12/28/2022] Open
|
37
|
The effectiveness of fish oil supplementation in asthmatic rats is limited by an inefficient action on ASM function. Lipids 2013; 48:889-97. [PMID: 23743575 DOI: 10.1007/s11745-013-3804-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Accepted: 05/14/2013] [Indexed: 01/20/2023]
Abstract
Episodes of acute exacerbation are the major clinical feature of asthma and therefore represent an important focus for developing novel therapies for this disease. There are many reports that the n-3 fatty acids found in fish oil exert anti-inflammatory effects, but there are few studies of the action of fish oil on airway smooth muscle (ASM) function. In the present investigation, we evaluated the effect of fish oil supplementation on smooth muscle force of contraction in ovalbumin-induced asthmatic Wistar rats, and its consequences on static lung compliance, mucus production, leukocyte chemotaxis and production of proinflammatory cytokines. Fish oil supplementation suppressed the infiltration of inflammatory cells into the lung in asthmatic animals (2.04 ± 0.19 × 10(6) cells vs. 3.33 ± 0.43 × 10(6) cells in the control asthmatic group; P < 0.05). Static lung compliance increased with fish oil supplementation in asthmatic rats (0.640 ± 0.053 mL/cm H2O vs. 0.399 ± 0.043 mL/cm H2O; P < 0.05). However, fish oil did not prevent asthma-associated lung eosinophilia and did not affect the concentrations of tumor necrosis factor-α and interleukin-1β in lung tissue or the proportion of the airways obliterated with mucus. Fish oil had no effect on the force of contraction in asthmatic rats in response to acetylcholine (3.026 ± 0.274 mN vs. 2.813 ± 0.364 mN in the control asthmatic group). In conclusion, although fish oil exerts some benefits in this model of asthma, its effectiveness appears to be limited by an inefficient action on airway smooth muscle function.
Collapse
|
38
|
Beneficial effects of n-3 PUFA on chronic airway inflammatory diseases. Prostaglandins Other Lipid Mediat 2012; 99:57-67. [DOI: 10.1016/j.prostaglandins.2012.09.006] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2012] [Revised: 09/26/2012] [Accepted: 09/27/2012] [Indexed: 12/14/2022]
|
39
|
Bossé Y. Asthmatic airway hyperresponsiveness: the ants in the tree. Trends Mol Med 2012; 18:627-33. [PMID: 23062358 DOI: 10.1016/j.molmed.2012.09.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2012] [Revised: 08/28/2012] [Accepted: 09/10/2012] [Indexed: 01/27/2023]
Abstract
Airways from asthmatics have a propensity to narrow excessively in response to spasmogens (i.e., contractile agonists), a feature called airway hyperresponsiveness (AHR). AHR is an important contributor to asthma symptoms because the degree of responsiveness dictates the amount of airway narrowing that occurs in response to inflammation-derived spasmogens produced endogenously following exposure to environmental triggers, such as allergens, viruses, or pollutants. The smooth muscle encircling the airways is responsible for responsiveness because it constricts the airway lumen when commanded to contract by spasmogens. However, whether AHR seen in asthmatics is due to stronger muscle is equivocal. In this opinion article, I propose that environmental triggers and other inflammatory molecules released during asthma attacks contribute to AHR by increasing muscle force.
Collapse
Affiliation(s)
- Ynuk Bossé
- Institut Universitaire de Cardiologie et de Pneumologie de Québec, Université Laval, Québec, QC, G1V 4G5, Canada.
| |
Collapse
|
40
|
Eto M, Brautigan DL. Endogenous inhibitor proteins that connect Ser/Thr kinases and phosphatases in cell signaling. IUBMB Life 2012; 64:732-9. [PMID: 22815089 DOI: 10.1002/iub.1067] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2012] [Accepted: 06/05/2012] [Indexed: 01/23/2023]
Abstract
Protein phosphatase activity acts as a primary determinant of the extent and duration of phosphorylation of cellular proteins in response to physiological stimuli. Ser/Thr protein phosphatase-1 (PP1) belongs to the PPP superfamily, and is associated with regulatory subunits that confer substrate specificity, allosteric regulation, and subcellular compartmentalization. In addition, all eukaryotic cells contain multiple heat-stable proteins that originally were thought to inhibit phosphatase catalytic subunits released from the regulatory subunits, as a fail-safe mechanism. However, discovery of C-kinase-activated PP1 inhibitor, Mr of 17 kDa (CPI-17) required fresh thinking about the endogenous inhibitors as specific regulators of particular phosphatase complexes, acting in addition to, not instead of, regulatory subunits. The cellular actions of the endogenous inhibitors are controlled by phosphorylation, connecting them to kinase pathways. More recent progress has unveiled additional functions of PP1 inhibitor-2 (I-2), including regulation of protein kinases. Transcriptional mechanisms govern the expression levels of CPI-17 in response to stimuli. If true for other inhibitor proteins, they have the potential of being diagnostic markers for pathological conditions. We discuss specific examples of PP1 inhibitor proteins regulating particular cellular functions and the rationale for incorporating phosphatase inhibitor proteins in development of new therapeutic strategies.
Collapse
Affiliation(s)
- Masumi Eto
- Department of Molecular Physiology and Biophysics, and Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA 19107, USA.
| | | |
Collapse
|
41
|
Docosahexaenoic acid monoacylglyceride decreases endothelin-1 induced Ca(2+) sensitivity and proliferation in human pulmonary arteries. Am J Hypertens 2012; 25:756-63. [PMID: 22534795 DOI: 10.1038/ajh.2012.45] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND Pulmonary artery vasoconstriction and vascular remodeling contribute to a sustained elevation of pulmonary vascular resistance and pressure in patients with pulmonary arterial hypertension (PH), an often fatal hemodynamic disease. The effect of docosahexaenoic acid monoacylglyceride (MAG-DHA) and the role of the 17 kDa protein kinase C-potentiated inhibitor protein (CPI-17) were determined on vasoconstriction and smooth muscle cell proliferation of human pulmonary arteries (HPA). METHODS HPA were obtained from 16 patients undergoing lung resection for carcinoma. The mechanical tension and Ca(2+) sensitivity were measured on arterial rings treated with endothelin-1 (ET-1) in the absence or presence of MAG-DHA. The effect of MAG-DHA on the level of proliferation of smooth muscle cells isolated from HPA was evaluated in order to determine the role of CPI-17 protein. RESULTS MAG-DHA treatment decreased the reactivity and Ca(2+) sensitivity induced by ET-1 in HPA. MAG-DHA treatment also decreased the expression of vascular endothelial growth factor (VEGF) induced by ET-1. Moreover, both VEGF inhibitor and MAG-DHA treatments reduced Ca(2+) hypersensitivity induced by ET-1, which was associated to a reduction in CPI-17 and myosin-binding subunit of the myosin light chain phosphatase (MYPT-1) phosphorylation levels. Proliferation of ET-1-stimulated HPA smooth muscle cells (PASMc) was also decreased following CPI-17 small interfering RNA transfection and MAG-DHA treatments. Western blot analyses revealed that MAG-DHA treatment resulted in decreased phosphorylation levels of CPI-17 and extracellular signal-regulated kinases (ERK) in PASMc treated with ET-1. CONCLUSIONS We have demonstrated that VEGF interacts with CPI-17 signaling pathway resulting in an increase in Ca(2+) sensitivity and proliferation of PASMc, whereas MAG-DHA treatment reversed these effects.
Collapse
|
42
|
Wright DB, Tripathi S, Sikarwar A, Santosh KT, Perez-Zoghbi J, Ojo OO, Irechukwu N, Ward JPT, Schaafsma D. Regulation of GPCR-mediated smooth muscle contraction: implications for asthma and pulmonary hypertension. Pulm Pharmacol Ther 2012; 26:121-31. [PMID: 22750270 DOI: 10.1016/j.pupt.2012.06.005] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2012] [Revised: 06/15/2012] [Accepted: 06/18/2012] [Indexed: 11/28/2022]
Abstract
Contractile G-protein-coupled receptors (GPCRs) have emerged as key regulators of smooth muscle contraction, both under healthy and diseased conditions. This brief review will discuss some key topics and novel insights regarding GPCR-mediated airway and vascular smooth muscle contraction as discussed at the 7th International Young Investigators' Symposium on Smooth Muscle (2011, Winnipeg, Manitoba, Canada) and will in particular focus on processes driving Ca(2+)-mobilization and -sensitization.
Collapse
Affiliation(s)
- D B Wright
- Department of Asthma, Allergy, and Lung Biology, King's College, London, United Kingdom
| | | | | | | | | | | | | | | | | |
Collapse
|
43
|
Ma Y, Lindsey ML, Halade GV. DHA derivatives of fish oil as dietary supplements: a nutrition-based drug discovery approach for therapies to prevent metabolic cardiotoxicity. Expert Opin Drug Discov 2012; 7:711-21. [PMID: 22724444 DOI: 10.1517/17460441.2012.694862] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
INTRODUCTION During the early 1970s, Danish physicians Jorn Dyerberg and colleagues observed that Greenland Eskimos consuming fatty fishes exhibited low incidences of heart disease. Fish oil is now one of the most commonly consumed dietary supplements. In 2004, concentrated fish oil was approved as a drug by the FDA for the treatment of hyperlipidemia. Fish oil contains two major omega-3 fatty acids: eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). With advancements in lipid concentration and purification techniques, EPA- or DHA-enriched products are now commercially available, and the availability of these components in isolation allows their individual effects to be examined. Newly synthesized derivatives and endogenously discovered metabolites of DHA exhibit therapeutic utility for obesity, metabolic syndrome and cardiovascular disease. AREAS COVERED This review summarizes our current knowledge on the distinct effects of EPA and DHA to prevent metabolic syndrome and reduce cardiotoxicity risk. Since EPA is an integral component of fish oil, we will briefly review EPA effects, but our main theme will be to summarize effects of the DHA derivatives that are available today. We focus on using nutrition-based drug discovery to explore the potential of DHA derivatives for the treatment of obesity, metabolic syndrome and cardiovascular diseases. EXPERT OPINION The safety and efficacy evaluation of DHA derivatives will provide novel biomolecules for the drug discovery arsenal. Novel nutritional-based drug discoveries of DHA derivatives or metabolites may provide realistic and alternative strategies for the treatment of metabolic and cardiovascular disease.
Collapse
Affiliation(s)
- Yonggang Ma
- The University of Texas Health Science Center at San Antonio, Division of Geriatrics, Gerontology and Palliative Medicine, Department of Medicine, San Antonio, TX 78245, USA
| | | | | |
Collapse
|
44
|
Kim JI, Urban M, Young GD, Eto M. Reciprocal regulation controlling the expression of CPI-17, a specific inhibitor protein for the myosin light chain phosphatase in vascular smooth muscle cells. Am J Physiol Cell Physiol 2012; 303:C58-68. [PMID: 22538237 DOI: 10.1152/ajpcell.00118.2012] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Cellular activity of the myosin light chain phosphatase (MLCP) determines agonist-induced force development of smooth muscle (SM). CPI-17 is an endogenous inhibitor protein for MLCP, responsible for mediating G-protein signaling into SM contraction. Fluctuations in CPI-17 expression occur in response to pathological stresses, altering excitation-contraction coupling in SM. Here, we determined the signaling pathways regulating CPI-17 expression in rat aorta tissues and the cell culture using a pharmacological approach. CPI-17 transcription was suppressed in response to the proliferative stimulus with platelet-derived growth factor (PDGF) through the ERK1/2 pathway, whereas it was elevated in response to inflammatory, stress-induced and excitatory stimuli with transforming growth factor-β, IL-1β, TNFα, sorbitol, and serotonin. CPI-17 transcription was repressed by inhibition of JNK, p38, PKC, and Rho-kinase (ROCK). The mouse and human CPI-17 gene promoters were governed by the proximal GC-boxes at the 5'-flanking region, where Sp1/Sp3 transcription factors bound. Sp1 binding to the region was more prominent in intact aorta tissues, compared with the SM cell culture, where the CPI-17 gene is repressed. The 173-bp proximal promoter activity was negatively and positively regulated through PDGF-induced ERK1/2 and sorbitol-induced p38/JNK pathways, respectively. By contrast, PKC and ROCK inhibitors failed to repress the 173-bp promoter activity, suggesting distal enhancer elements. CPI-17 transcription was insensitive to knockdown of myocardin/Kruppel-like factor 4 small interfering RNA or histone deacetylase inhibition. The reciprocal regulation of Sp1/Sp3-driven CPI-17 expression through multiple kinases may be responsible for the adaptation of MLCP signal and SM tone to environmental changes.
Collapse
Affiliation(s)
- Jee In Kim
- Department of Molecular Physiology and Biophysics, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | | | | | | |
Collapse
|