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Chen Y, Liu Y, Xia H, Xia G, Xu J, Lin S, Guo L, Liu Y. The effect of the Litcubanine A on the treatment of murine experimental periodontitis by inhibiting monocyte-macrophage chemotaxis and osteoc last differentiation. J Periodontal Res 2023; 58:948-958. [PMID: 37409514 DOI: 10.1111/jre.13154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 05/11/2023] [Accepted: 06/06/2023] [Indexed: 07/07/2023]
Abstract
BACKGROUND Periodontal disease is an inflammatory disease of periodontal tissues that is closely connected with systemic diseases. During periodontitis, the inappropriate recruitment and activation of monocytes-macrophages causes an increase in osteoclast activity and disrupts bone homeostasis. Therefore, it is a promising therapeutic strategy to treat periodontitis by regulating the functions of monocytes-macrophages. Litcubanine A (LA) is an isoquinoline alkaloid extracted from the traditional Chinese medicine Litsea cubeba, which was proven to have reproducible anti-inflammatory effects, but its regulatory role on bone homeostasis in periodontitis is still not clear. METHODS In this study, zebrafish experiments and a mouse ligature-induced periodontitis model were performed, and histological analysis was used to investigate the effect of LA on macrophage chemotaxis under the inflammatory environment. Real-time PCR was used to detect the regulatory effect of LA (100 nM ~ 100 μM) on the chemotaxis function of macrophages induced by LPS. Apoptosis assay and flow cytometry were used to elucidate the influence of LA on macrophage apoptosis and proliferation. To further clarify the regulatory role of LA on macrophage osteoclast differentiation, real-time PCR, histological analysis, western blot, and micro-computed tomography (micro-CT) were performed in vivo and in vitro to verify the impact of LA on bone homeostasis. RESULTS Compared with the control group, the chemotaxis function of macrophage was significantly attenuated by LA in vivo. LA could significantly inhibit the expression of genes encoding the chemokine receptors Ccr1 and Cxcr4, and its ligand chemokine Cxcl12 in macrophages, and suppresses the differentiation of osteoclastic precursors to osteoclasts through the MAPK signaling pathway. There were significantly lower osteoclast differentiation and bone loss in the LA group compared with the control in the ligature-induced periodontitis model. CONCLUSION LA is a promising candidate for the treatment of periodontitis through its reproducible functions of inhibiting monocyte-macrophage chemotaxis and osteoclast differentiation.
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Affiliation(s)
- Yingyi Chen
- Laboratory of Tissue Regeneration and Immunology and Department of Periodontics, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, School of Stomatology, Capital Medical University, Beijing, China
- Immunology Research Center for Oral and Systemic Health, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Yitong Liu
- Laboratory of Tissue Regeneration and Immunology and Department of Periodontics, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, School of Stomatology, Capital Medical University, Beijing, China
- Immunology Research Center for Oral and Systemic Health, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Huan Xia
- Key Laboratory of Chinese Internal Medicine of Ministry of Education and Beijing, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Guiyang Xia
- Key Laboratory of Chinese Internal Medicine of Ministry of Education and Beijing, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Junji Xu
- Laboratory of Tissue Regeneration and Immunology and Department of Periodontics, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, School of Stomatology, Capital Medical University, Beijing, China
- Immunology Research Center for Oral and Systemic Health, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Sheng Lin
- Key Laboratory of Chinese Internal Medicine of Ministry of Education and Beijing, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Lijia Guo
- Department of Orthodontics, School of Stomatology, Capital Medical University, Beijing, China
| | - Yi Liu
- Laboratory of Tissue Regeneration and Immunology and Department of Periodontics, Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, School of Stomatology, Capital Medical University, Beijing, China
- Immunology Research Center for Oral and Systemic Health, Beijing Friendship Hospital, Capital Medical University, Beijing, China
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Kobayashi M, Namiki H, Hayashi H. Quantitative analysis of powder samples using screen-printing techniques as sample preparation methods for LA-ICP-MS. ANAL SCI 2023; 39:1757-1762. [PMID: 37528280 DOI: 10.1007/s44211-023-00390-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Accepted: 06/19/2023] [Indexed: 08/03/2023]
Abstract
The combination of laser ablation and inductively coupled plasma mass spectrometry (LA-ICP-MS) offers a powerful tool for directly analyzing solid samples. However, LA-ICP-MS has a limitation in quantitative analyses owing to a requirement for matrix-matched standard materials. In this study, we have developed a sample preparation method that facilitates quantitative analyses by LA-ICP-MS. The sample powder is dispersed in a liquid resin and film-like samples are prepared from the resulting paste by a screen-printing technique. The sample includes the analyte spiked with internal standards and is prepared by mixing standard solutions in the sample paste. Because all reagents except for the sample powder are liquids, homogeneous samples can be easily obtained. The internal standard and concentration of the spiked analyte can be tailored for each sample, which is a requirement for accurate quantitative analyses. The amount of sample and concentration of the spiked analyte are controlled against an internal standard, enabling internal standardization without the need to have an element of known concentration in the sample. The accuracy of this method was evaluated by analyzing impurity elements in TiO2 powder; however, it is expected that other materials could also be analyzed. The versatility and flexibility of this method suggest great potential for quantitative analyses by LA-ICP-MS, for which reliable matrix-matched standard materials are required.
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Affiliation(s)
- Masahiro Kobayashi
- Tokyo Metropolitan Industrial Technology Research Institute, 2-4-10 Aomi, Koto-ku, Tokyo, 135-0064, Japan.
| | - Hiromasa Namiki
- Tokyo Metropolitan Industrial Technology Research Institute, 2-4-10 Aomi, Koto-ku, Tokyo, 135-0064, Japan
| | - Hideo Hayashi
- Tokyo Metropolitan Industrial Technology Research Institute, 2-4-10 Aomi, Koto-ku, Tokyo, 135-0064, Japan
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San-Juan D, Mercado WP, Lorenzana ÁL, Torres JEG, Delgado CAR, Leyva Oceguera RA, Lee Á, Kimaid PAT. Intraoperative neurophysiological monitoring in Latin America: A bibliometric analysis. J Clin Monit Comput 2022; 36:1827-1832. [PMID: 35235105 DOI: 10.1007/s10877-022-00831-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Accepted: 02/07/2022] [Indexed: 11/29/2022]
Abstract
PURPOSE Intraoperative Neurophysiological Monitoring (IOMM) has been used worldwide in the attempt to reduce postsurgical neurological deficits, however, most of the publications are from developed countries. There is a global bibliometric analysis of IOMN in spinal surgery, however, the contribution of Latin America (LA) is not mentioned. The aim of this study is to describe scientific productivity, patterns of publications, and thematic trends of IONM in LA. METHODS Data was collected using Scopus database, by searching scientific articles with LA affiliation, using 18 keywords. We excluded duplicates, not original articles, reviews, surveys, and articles not related to humans. Articles were analyzed and classified as follows: year of publication, language of the original document, journals metrics, country, IONM modality, etiology, location of surgery, medical specialties, and outcome. Descriptive statistics were used. RESULTS We obtained 8,699 scientific articles of which 41 scientific articles from 7 LA countries were selected. Mexico has the highest number of publications. In most countries, supratentorial location showed the highest frequency. Somatosensory evoked potentials and electrocorticography were the most performed modalities. Neurosurgery was the most involved specialty of our 41 scientific articles, and 95.1% of these publications concluded that IONM is useful to guide surgical procedures. CONCLUSIONS Mexico and Brazil have led IONM publications in LA. The lower reference in publications of visual evoked potentials and brainstem auditory evoked potentials IONM modalities, could be considered in the future to boost tailored research in LA.
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Affiliation(s)
- Daniel San-Juan
- Epilepsy Clinic, National Institute of Neurology and Neurosurgery Manuel Velasco Suárez, Juan. Av. Insurgentes Sur 3877, Col. La Fama, 14269, Tlalpan, Mexico.
| | - Wirton Peña Mercado
- Clinical Neurophysiology Department, Centro Medico Nacional 20 de Noviembre, Mexico, Mexico
| | - Ángel Labra Lorenzana
- Epilepsy Clinic, National Institute of Neurology and Neurosurgery Manuel Velasco Suárez, Juan. Av. Insurgentes Sur 3877, Col. La Fama, 14269, Tlalpan, Mexico
| | - Jacob Eli García Torres
- Epilepsy Clinic, National Institute of Neurology and Neurosurgery Manuel Velasco Suárez, Juan. Av. Insurgentes Sur 3877, Col. La Fama, 14269, Tlalpan, Mexico
| | - César Alessandro Ramos Delgado
- Epilepsy Clinic, National Institute of Neurology and Neurosurgery Manuel Velasco Suárez, Juan. Av. Insurgentes Sur 3877, Col. La Fama, 14269, Tlalpan, Mexico
| | - Rodolfo Alejandro Leyva Oceguera
- Epilepsy Clinic, National Institute of Neurology and Neurosurgery Manuel Velasco Suárez, Juan. Av. Insurgentes Sur 3877, Col. La Fama, 14269, Tlalpan, Mexico
| | - Ángel Lee
- Comision Coordinadora de Institutos Nacionales de Salud, Mexico, Mexico
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Vastolo A, Iliano S, Laperuta F, Pennacchio S, Pompameo M, Cutrignelli MI. Hemp Seed Cake as a Novel Ingredient for Dog's Diet. Front Vet Sci 2022; 8:754625. [PMID: 34970613 PMCID: PMC8712657 DOI: 10.3389/fvets.2021.754625] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 11/17/2021] [Indexed: 11/23/2022] Open
Abstract
In the last few years, the popularity of industrial hemp and its products is increased. From a nutritional point of view, hemp and its products are rich in protein, polyunsaturated fatty acids, vitamins, and useful minerals. Nowadays, the European Commission authorizes the use of hempseed and hempseed oil co-products in animal nutrition. This study is aimed to evaluate the use of hempseed cake in dogs' nutrition, comparing the effect of the supplementation of two lipid sources: swine tallow (T-diet) and hempseed cake (H-diet). A double-blind nutritional trial was performed at a municipal kennel located in Naples. Eight crossbreed neutered dogs recognized in good health were recruited and divided into two homogeneous groups (T- vs. H-group). Both diets were analyzed for chemical composition and fatty acid profile. Blood count and biochemical profile were evaluated at recruitment (T0) and the end of the trial (T30). Oleic, palmitic, and stearic acids were the most representative fatty acids in both diets; however, the H-diet contains more than double concentration of linoleic and α-linoleic acids compared to the T-diet (p < 0.01). The H-diet has shown significantly (p < 0.01) higher peroxidation index as the only negative aspect, which could compromise its shelf-life. After 30 days of administration, the H-group has shown a significant (p < 0.01 and p < 0.05) reduction of liver and renal markers [aspartate transferase (AST), alanine transaminase (ALT), and creatinine] and cholesterol, due to the healthier fatty acid profile. Hempseed cake seems a suggestable source of polyunsaturated fatty acids for dogs considering these preliminary results.
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Affiliation(s)
- Alessandro Vastolo
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Naples, Italy
| | - Sergio Iliano
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Naples, Italy
| | | | - Saverio Pennacchio
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Naples, Italy
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Di Q, Piersanti A, Zhang Q, Miceli C, Li H, Liu X. Genome-Wide Association Study Identifies Candidate Genes Re lated to the Linoleic Acid Content in Soybean Seeds. Int J Mol Sci 2021; 23:454. [PMID: 35008885 PMCID: PMC8745128 DOI: 10.3390/ijms23010454] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 12/28/2021] [Accepted: 12/29/2021] [Indexed: 02/02/2023] Open
Abstract
Soybean (Glycine max (L.) Merrill) oil is a complex mixture of five fatty acids (palmitic, stearic, oleic, linoleic, and linolenic). The high content of linoleic acid (LA) contributes to the oil having poor oxidative stability. Therefore, soybean seed with a lower LA content is desirable. To investigate the genetic architecture of LA, we performed a genome-wide association study (GWAS) using 510 soybean cultivars collected from China. The phenotypic identification results showed that the content of LA varied from 36.22% to 72.18%. The GWAS analysis showed that there were 37 genes related to oleic acid content, with a contribution rate of 7%. The candidate gene Glyma.04G116500.1 (GmWRI14) on chromosome 4 was detected in three consecutive years. The GmWRI14 showed a negative correlation with the LA content and the correlation coefficient was -0.912. To test whether GmWRI14 can lead to a lower LA content in soybean, we introduced GmWRI14 into the soybean genome. Matrix-assisted laser desorption/ionization time-of-flight imaging mass spectrometry (MALDI-TOF IMS) showed that the overexpression of GmWRI14 leads to a lower LA content in soybean seeds. Meanwhile, RNA-seq verified that GmWRI14-overexpressed soybean lines showed a lower accumulation of GmFAD2-1A and GmFAD2-1B than control lines. Our results indicate that the down-regulation of the FAD2 gene triggered by the transcription factor GmWRI14 is the underlying mechanism reducing the LA level of seed. Our results provide novel insights into the genetic architecture of LA and pinpoint potential candidate genes for further in-depth studies.
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Affiliation(s)
- Qin Di
- Research Center of Integrative Medicine, School of Basic Medical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China;
- Innovative Institute for Plant Health, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China;
- School of Biosciences and Veterinary Medicine, University of Camerino, 62032 Camerino, Italy; (A.P.); (C.M.)
| | - Angela Piersanti
- School of Biosciences and Veterinary Medicine, University of Camerino, 62032 Camerino, Italy; (A.P.); (C.M.)
| | - Qi Zhang
- Innovative Institute for Plant Health, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China;
| | - Cristina Miceli
- School of Biosciences and Veterinary Medicine, University of Camerino, 62032 Camerino, Italy; (A.P.); (C.M.)
| | - Hui Li
- Research Center of Integrative Medicine, School of Basic Medical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China;
| | - Xiaoyi Liu
- Research Center of Integrative Medicine, School of Basic Medical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China;
- School of Biosciences and Veterinary Medicine, University of Camerino, 62032 Camerino, Italy; (A.P.); (C.M.)
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Moser LB, Bauer C, Jeyakumar V, Niculescu-Morzsa EP, Nehrer S. Hyaluronic Acid as a Carrier Supports the Effects of Glucocorticoids and Diminishes the Cytotoxic Effects of Local Anesthetics in Human Articu lar Chondrocytes In Vitro. Int J Mol Sci 2021; 22:11503. [PMID: 34768933 DOI: 10.3390/ijms222111503] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 10/21/2021] [Accepted: 10/22/2021] [Indexed: 02/06/2023] Open
Abstract
The current study aimed to investigate the cytotoxicity of co-administrating local anesthetics (LA) with glucocorticoids (GC) and hyaluronic acid (HA) in vitro. Human articular cartilage was obtained from five patients undergoing total knee arthroplasty. Chondrocytes were isolated, expanded, and seeded in 24-well plates for experimental testing. LA (lidocaine, bupivacaine, ropivacaine) were administered separately and co-administered with the following substances: GC, HA, and GC/HA. Viability was confirmed by microscopic images, flow cytometry, metabolic activity, and live/dead assay. The addition of HA and GC/HA resulted in enhanced attachment and branched appearance of the chondrocytes compared to LA and LA/GC. Metabolic activity was better in all LA co-administered with HA and GC/HA than with GC and only LA. Flow cytometry revealed the lowest cell viability in lidocaine and the highest cell viability in ropivacaine. This finding was also confirmed by live/dead assay. In conclusion, HA supports the effect of GC and reduces chondrotoxic effects of LA in vitro. Thereby, the co-administration of HA to LA and GC offers an alternative less chondrotoxic approach for treating patients with symptomatic osteoarthritis of the knee.
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Skarpengland T, Macpherson ME, Hov JR, Kong XY, Bohov P, Halvorsen B, Fevang B, Berge RK, Aukrust P, Jørgensen SF. Altered Plasma Fatty Acids Associate with Gut Microbial Composition in Common Variable Immunodeficiency. J Clin Immunol 2021. [PMID: 34669143 DOI: 10.1007/s10875-021-01146-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Accepted: 09/27/2021] [Indexed: 12/11/2022]
Abstract
PURPOSE Fatty acid (FA) abnormalities are found in various inflammatory disorders and have been related to disturbed gut microbiota. Patients with common variable immunodeficiency (CVID) have inflammatory complications associated with altered gut microbial composition. We hypothesized that there is an altered FA profile in CVID patients, related to gut microbial dysbiosis. METHODS Plasma FAs were measured in 39 CVID patients and 30 healthy controls. Gut microbial profile, a food frequency questionnaire, and the effect of the oral antibiotic rifaximin were investigated in CVID patients. RESULTS The n-3 polyunsaturated fatty acids (PUFAs), eicosapentaenoic acid (EPA) (1.4 [1.0-1.8] vs. 1.9 [1.2-2.5], median (IQR), P < 0.05), and docosahexaenoic acid (DHA) (3.2 [2.4-3.9] vs. 3.5 [2.9-4.3], P < 0.05), all values expressed as weight percent of total plasma FAs, were reduced in CVID compared to controls. Also, n-6 PUFAs (34.3 ± 3.4 vs. 37.1 ± 2.8, mean ± SD, P < 0.001) and linoleic acid (LA) (24.5 ± 3.3 vs. 28.1 ± 2.7, P < 0.0001) and the FA anti-inflammatory index (98.9 [82.1-119.4] vs. 117.0 [88.7-153.1], median (IQR), P < 0.05) were reduced in CVID. The microbial alpha diversity was positively associated with plasma n-6 PUFAs (r = 0.41, P < 0.001) and LA (r = 0.51, P < 0.001), but not n-3 PUFAs (P = 0.78). Moreover, a 2-week course of rifaximin significantly reduced the proportion of n-6 PUFAs (P = 0.04, UNIANOVA). Serum immunoglobulin G (IgG) levels correlated with plasma n-3 PUFAs (rho = 0.36, P = 0.03) and DHA (rho = 0.41, P = 0.009). CONCLUSION We found a potentially unfavorable FA profile in CVID, related to low IgG levels. High plasma n-6 PUFAs were related to increased gut microbial diversity and altered by rifaximin therapy.
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Hartling I, Cremonesi A, Osuna E, Lou PH, Lucchinetti E, Zaugg M, Hersberger M. Quantitative profiling of inf lammatory and pro-resolving lipid mediators in human adolescents and mouse plasma using UHPLC-MS/MS. Clin Chem Lab Med 2021; 59:1811-1823. [PMID: 34243224 DOI: 10.1515/cclm-2021-0644] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 06/29/2021] [Indexed: 02/07/2023]
Abstract
OBJECTIVES Lipid mediators are bioactive lipids which help regulate inflammation. We aimed to develop an ultra-high-performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) method to quantify 58 pro-inflammatory and pro-resolving lipid mediators in plasma, determine preliminary reference ranges for adolescents, and investigate how total parenteral nutrition (TPN) containing omega-3 polyunsaturated fatty acid (n-3 PUFA) or n-6 PUFA based lipid emulsions influence lipid mediator concentrations in plasma. METHODS Lipid mediators were extracted from plasma using SPE and measured using UHPLC-MS/MS. EDTA plasma was collected from healthy adolescents between 13 and 17 years of age to determine preliminary reference ranges and from mice given intravenous TPN for seven days containing either an n-3 PUFA or n-6 PUFA based lipid emulsion. RESULTS We successfully quantified 43 lipid mediators in human plasma with good precision and recovery including several leukotrienes, prostaglandins, resolvins, protectins, maresins, and lipoxins. We found that the addition of methanol to human plasma after blood separation reduces post blood draw increases in 12-hydroxyeicosatetraenoic acid (12-HETE), 12-hydroxyeicosapentaenoic acid (12-HEPE), 12S-hydroxyeicosatrienoic acid (12S-HETrE), 14-hydroxydocosahexaenoic acid (14-HDHA) and thromboxane B2 (TXB2). Compared to the n-6 PUFA based TPN, the n-3 PUFA based TPN increased specialized pro-resolving mediators such as maresin 1 (MaR1), MaR2, protectin D1 (PD1), PDX, and resolvin D5 (RvD5), and decreased inflammatory lipid mediators such as leukotriene B4 (LTB4) and prostaglandin D2 (PGD2). CONCLUSIONS Our method provides an accurate and sensitive quantification of 58 lipid mediators from plasma samples, which we used to establish a preliminary reference range for lipid mediators in plasma samples of adolescents; and to show that n-3 PUFA, compared to n-6 PUFA rich TPN, leads to a less inflammatory lipid mediator profile in mice.
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Affiliation(s)
- Ivan Hartling
- Division of Clinical Chemistry and Biochemistry, Children's Research Center, University Children's Hospital Zurich, University of Zurich, Zurich, Switzerland.,Zurich Centre for Integrative Human Physiology, University of Zurich, Zurich, Switzerland
| | - Alessio Cremonesi
- Division of Clinical Chemistry and Biochemistry, Children's Research Center, University Children's Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Ester Osuna
- Human Nutrition Laboratory, Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland
| | - Phing-How Lou
- Department of Anesthesiology and Pain Medicine, Cardiovascular Research Centre, University of Alberta, Edmonton, Canada
| | | | - Michael Zaugg
- Department of Anesthesiology and Pain Medicine, Cardiovascular Research Centre, University of Alberta, Edmonton, Canada.,Department of Pharmacology, University of Alberta, Edmonton, Canada
| | - Martin Hersberger
- Division of Clinical Chemistry and Biochemistry, Children's Research Center, University Children's Hospital Zurich, University of Zurich, Zurich, Switzerland.,Zurich Centre for Integrative Human Physiology, University of Zurich, Zurich, Switzerland
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Luo W, Sun R, Chen X, Li J, Jiang J, He Y, Shi S, Wen H. ERK Activation-Mediated Autophagy Induction Resists Licochalcone A-Induced Anticancer Activities in Lung Cancer Cells in vitro. Onco Targets Ther 2021; 13:13437-13450. [PMID: 33447049 PMCID: PMC7802906 DOI: 10.2147/ott.s278268] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 12/03/2020] [Indexed: 12/17/2022] Open
Abstract
Introduction The incidence and mortality rates of lung cancer rank top in the different types of cancers in China. Licochalcone A (LA) is a flavonoid extracted from the roots of licorice with antitumor effects in various cancers in vitro and in vivo. However, the role of LA in non-small cell lung cancer (NSCLC) remains largely unclear. Methods The cell viability was measured by MTT assay, Edu staining and colony formation assay. Apoptosis was investigated using Annexin V/PI double-stained assays with flow cytometry. Real-time quantitative RT-PCR was carried out to investigate the expression of mRNA of related proteins. Western blotting was used to investigate the expression of related proteins. Results The results show that LA inhibits the proliferation of NSCLC cells in a dose-dependent manner and induces apoptotic cell death. Moreover, LA significantly suppresses the expression of c-IAP1, c-IAP2, XIAP, Survivin, c-FLIPL and RIP1 without influencing the level of mRNA. Cycloheximide chase assay demonstrates that LA greatly decreases the stability of Survivin, XIAP and RIP1. Mechanistic studies indicate that LA induces cytoprotective autophagy since block of autophagy with CQ greatly enhances LA-induced anticancer activities. Furthermore, LA rapidly induces ERK and p38 activation in a time-dependent manner in both A549 and H460 cells, but suppresses the activities of c-Jun N-terminal kinase (JNK); suppression of ERK not p38 with inhibitor attenuates LA-induced autophagy, while it remarkably enhances LA-induced cytotoxicity in lung cancer cells and further promotes the degradation of apoptosis-related proteins. Discussion The results of this study provide novel insights on the role of apoptosis-related proteins and the MAPKs pathway in the anticancer activities of LA.
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Affiliation(s)
- Wei Luo
- Department of Respiratory and Critical Care Medicine, The People's Hospital of Leshan, Leshan, Sichuan, People's Republic of China
| | - Ruifen Sun
- Center for Scientific Research, Yunnan University of Chinese Traditional Medicine, Kunming, Yunnan, People's Republic of China
| | - Xin Chen
- College of Chinese Medicine, Yunnan University of Chinese Medicine, Kunming, Yunnan, People's Republic of China
| | - Ju Li
- College of Basic Medicine, Yunnan University of Chinese Medicine, Kunming, Yunnan, People's Republic of China
| | - Jike Jiang
- College of Basic Medicine, Yunnan University of Chinese Medicine, Kunming, Yunnan, People's Republic of China
| | - Yuxiao He
- College of Basic Medicine, Yunnan University of Chinese Medicine, Kunming, Yunnan, People's Republic of China
| | - Shaoqing Shi
- Center for Scientific Research, Yunnan University of Chinese Traditional Medicine, Kunming, Yunnan, People's Republic of China
| | - Heling Wen
- Department of Cardiology, Sichuan Academy of Medical Sciences and Sichuan Provincial People's Hospital, Chengdu, Sichuan, People's Republic of China
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Eun LY, Park HK, Choi JY. Comparison of the Change in Diastolic Dysfunction after Transcatheter Atrial Septal Defect Closure between Asymptomatic Younger and Older Age Groups. J Clin Med 2020; 9:jcm9113637. [PMID: 33198239 PMCID: PMC7696672 DOI: 10.3390/jcm9113637] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Revised: 11/06/2020] [Accepted: 11/09/2020] [Indexed: 11/16/2022] Open
Abstract
Transcatheter device closure of a secundum atrial septal defect (ASD) is followed by a noticeable change in the left atrium (LA) and left ventricle (LV) over a long-term follow-up. This study aimed to assess the remodeling of the atrial and ventricular myocardium with respect to diastolic function in adult ASD patients. Around 38 asymptomatic patients (age: 48.6 ± 17.1 years, range: 23–69 years) diagnosed with ASD during routine health check-up and who underwent ASD device closure with the Amplatzer septal occluder were included in this retrospective study, and their medical records (containing echocardiographic data) were reviewed. The defect size was 21.77 + 6.79 mm, while the balloon measurement of the defect was 24.29 ± 6.64 mm. The patients were divided into two groups, namely, Group I (with 18 patients aged <50 years [mean: 33.06 ± 9.43 years] and Group II (with 20 patients aged ≥50 years [mean: 62.55 ± 7.54 years]). Comparison of echocardiographic data collected before closure and at a follow-up 2 years later revealed significant differences between pre-closure and post-closure states in the left ventricular end-diastolic dimension (40.76 ± 3.28 vs. 43.39 ± 3.52), left ventricular mass (99.64 ± 28.81 vs. 116.57 ± 32.03), and right ventricular pressure (36.88 ± 12.20 vs. 31.81 ± 11.11). Tissue Doppler measurements were significantly decreased 2 years after closure, while the post-closure E/E’ was higher than the pre-closure E/E’ (11.58 ± 4.80 vs. 8.79 + 3.19, p < 0.005). In both groups, mitral A and tissue Doppler E’, A’, and S’ values decreased post-closure, while the E/E’ was higher in Group II than in Group I at both pre-closure and long-term follow-up measurements (pre-closure: 9.60 ± 5.15 vs. 7.41 ± 1.42, p < 0.003; post-closure: 13.03 + 4.05 vs. 10.49 ± 3.95, p < 0.02). The LA size and LV function exhibited recognizable remodeling after transcatheter ASD closure. Because the LV preload elevation (i.e., E/E’) after ASD closure can be pronounced in older patients, caution should be provided more in older patients than in younger patients. Hence, it may be beneficial to close the ASD at an earlier age in adults even after a late diagnosis; a relatively younger age may be more suited for adaptation to the remodeling process to protect the myocardial function. Careful consideration should be given to the previous underloaded left heart after long-term closure.
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Affiliation(s)
- Lucy Youngmin Eun
- Division of Pediatric Cardiology, Department of Pediatrics, Yonsei University College of Medicine, Seoul 03722, Korea;
| | - Han Ki Park
- Division of Cardiovascular Surgery, Department of Thoracic and Cardiovascular Surgery, Yonsei University College of Medicine, Seoul 03722, Korea
- Correspondence: (H.K.P.); (J.Y.C.)
| | - Jae Young Choi
- Division of Pediatric Cardiology, Department of Pediatrics, Yonsei University College of Medicine, Seoul 03722, Korea;
- Correspondence: (H.K.P.); (J.Y.C.)
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11
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Rauch J, Fehr M, Beyerbach M, Hungerbuehler SO. Comparative assessment of left atrial volume in healthy cats by two-dimensional and three-dimensional echocardiography. BMC Vet Res 2020; 16:263. [PMID: 32727447 PMCID: PMC7391821 DOI: 10.1186/s12917-020-02473-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Accepted: 07/13/2020] [Indexed: 12/03/2022] Open
Abstract
Background The left atrium (LA) is an important prognostic parameter in cardiac pathologies of cats. Its size is currently measured in one-dimensional methods, while human medicine considers two- and three-dimensional echocardiography as standard. The objectives of this study were to compare monoplane, biplane, triplane and real-time three dimensional echocardiography for volumetric measurement of the left atrium in healthy cats and establish a reference interval for further studies on cats with heart disease. Additionally, the influence of age, sex and weight on left atrial volume (LAV) was tested. Results One dimensional monoplane Simpson method of discs (SMOD) in the right parasternal four chamber view (r4) and the left apical 2 chamber view (l2) as well as biplane SMOD had no significant difference for left atrial maximum volume (LAMax). They can be used as equivalent in future studies and one common reference range was set up (1.96 ± 0.54 ml). Those three methods produced significantly higher volumes than triplane echocardiography (RTTPE) and real time three dimensional echocardiography (RT3DE) using TomTec® software. LA volumetry with RTTPE and RT3DE-TomTec™ was more feasible than expected, but low RT3DE image quality was the main reason for excluding patients. Neither age nor weight had an influence on LA volume in healthy cats. Male LAV results were only slightly, but in 2D and RTTPE significantly higher than those of female cats with a range of + 10.46% to + 19.58%. Conclusions Monoplane, biplane, triplane and real-time three dimensional echocardiography were feasible for LA volumetry in healthy cats and showed acceptable intra- and interobserver variability. One common LAMax reference range for monoplane r4, l2 and biplane SMOD was set up. Raw data can be used for LA volumes and does not need to be correlated with the cat’s weight or age. Male cats have only slightly but significantly larger atria than females in 2D and RTTPE. Therefore, under reservation, also sex related limit values were defined.
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Affiliation(s)
- Janina Rauch
- Small Animal Clinic, University of Veterinary Medicine Hannover, Foundation, Bünteweg 9, D-30559, Hannover, Germany.
| | - Michael Fehr
- Small Animal Clinic, University of Veterinary Medicine Hannover, Foundation, Bünteweg 9, D-30559, Hannover, Germany
| | - Martin Beyerbach
- Department of Biometry, Epidemiology and Information Processing, University of Veterinary Medicine Hannover, Foundation, Bünteweg 2, D-30559, Hannover, Germany
| | - Stephan O Hungerbuehler
- Tiergesundheitszentrum Hungerbühler, Tierärztliche Klinik für Kleintiere Salzgitter, Gerichtsweg 3, 38229, Salzgitter, Germany
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12
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Nayak M, Giri SS, Pradhan A, Samanta M, Saha A. Effects of dietary α-linolenic acid/linoleic acid ratio on growth performance, tissue fatty acid profile, serum metabolites and Δ6 fad and elovl5 gene expression in silver barb (Puntius gonionotus). J Sci Food Agric 2020; 100:1643-1652. [PMID: 31802501 DOI: 10.1002/jsfa.10177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 11/26/2019] [Accepted: 11/28/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND Silver barb (Puntius gonionotus) is a medium-sized carp that is promising for freshwater aquaculture in Asia. This study's aim was to investigate the ideal dietary α-linolenic acid (ALA): linoleic acid (LA) ratio for maximizing long-chain polyunsaturated fatty acid (LC-PUFA) synthesis and their deposition in the muscle of silver barb, as that of fish oil based control diet. RESULT Fish (with an initial body weight of 11.07 ± 0.12 g) were fed for 60 days with five experimental iso-proteinous, iso-lipidic, and iso-caloric diets, supplemented with linseed oil and peanut oil at varying levels to obtain ALA:LA ratios of 0.35, 0.51, 0.91, 2.04, 2.66. A control diet was prepared by supplementing fish oil. The dietary ALA:LA ratio did not influence the growth performance of fish. With increased dietary ALA:LA ratios, LA content decreased and ALA content increased in the muscle and liver of silver barb. The n-3 LC-PUFA level in muscle and liver was not influenced by feeding different ratios of ALA:LA, whereas n-6 LC-PUFA was decreased in the muscle and increased in the liver with increased dietary ALA:LA ratios. Increasing dietary ALA:LA ratio increased the Δ6fad and elovl5mRNA expression in the liver, muscle, brain, and intestinal tissues of silver barbs. CONCLUSION Silver barb possess the ability to elongate and desaturate ALA and LA to their end products EPA and DHA. The highest level expression of Δ6 fad and elovl5 mRNA at the dietary ALA:LA ratio of 2.66 suggests greater affinity of these enzymes towards ALA than LA in silver barb. © 2019 Society of Chemical Industry.
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Affiliation(s)
- Madhusmita Nayak
- Nutrigenomics Laboratory, Fish Nutrition and Physiology Division, ICAR- Central Institute of Freshwater Aquaculture, Kausalyaganga, Bhubaneswar, India
| | - Shiba Shankar Giri
- Nutrigenomics Laboratory, Fish Nutrition and Physiology Division, ICAR- Central Institute of Freshwater Aquaculture, Kausalyaganga, Bhubaneswar, India
| | - Avinash Pradhan
- Nutrigenomics Laboratory, Fish Nutrition and Physiology Division, ICAR- Central Institute of Freshwater Aquaculture, Kausalyaganga, Bhubaneswar, India
| | - Mrinal Samanta
- Nutrigenomics Laboratory, Fish Nutrition and Physiology Division, ICAR- Central Institute of Freshwater Aquaculture, Kausalyaganga, Bhubaneswar, India
| | - Ashis Saha
- Nutrigenomics Laboratory, Fish Nutrition and Physiology Division, ICAR- Central Institute of Freshwater Aquaculture, Kausalyaganga, Bhubaneswar, India
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Burns-Whitmore B, Froyen E, Heskey C, Parker T, San Pablo G. Alpha-Linolenic and Linoleic Fatty Acids in the Vegan Diet: Do They Require Dietary Reference Intake/Adequate Intake Special Consideration? Nutrients 2019; 11:nu11102365. [PMID: 31590264 PMCID: PMC6835948 DOI: 10.3390/nu11102365] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 09/22/2019] [Accepted: 09/27/2019] [Indexed: 01/16/2023] Open
Abstract
Good sources of the long-chain n-3 fatty acids, eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) include cold-water fish and seafood; however, vegan diets (VGNs) do not include animal-origin foods. Typically, US omnivores obtain enough dietary EPA and DHA, but unless VGNs consume algal n-3 supplements, they rely on endogenous production of long-chain fatty acids. VGN diets have several possible concerns: (1) VGNs have high intakes of linoleic acid (LA) as compared to omnivore/non-vegetarian diets. (2) High intakes of LA competitively interfere with the endogenous conversion of alpha-linolenic acid (ALA) to EPA and DHA. (3) High somatic levels of LA/low ALA indicate a decreased ALA conversion to EPA and DHA. (4) Some, not all VGNs meet the Dietary Reference Intake Adequate Intake (DRI-AI) for dietary ALA and (5) VGN diets are high in fiber, which possibly interferes with fat absorption. Consequently, health professionals and Registered Dietitians/Registered Dietitian Nutritionists working with VGNs need specific essential fatty acid diet guidelines. The purpose of this review was: (1) to suggest that VGNs have a DRI-AI Special Consideration requirement for ALA and LA based on VGN dietary and biochemical indicators of status and (2) to provide suggestions to ensure that VGNs receive adequate intakes of LA and ALA.
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Affiliation(s)
- Bonny Burns-Whitmore
- Nutrition and Food Science Department, Don B Huntley College of Agriculture, California State Polytechnic University, Pomona, CA 91768, USA.
| | - Erik Froyen
- Nutrition and Food Science Department, Don B Huntley College of Agriculture, California State Polytechnic University, Pomona, CA 91768, USA.
| | - Celine Heskey
- Nutrition Department, School of Public Health, Loma Linda University, Loma Linda, CA 92354, USA.
| | - Temetra Parker
- Nutrition and Food Science Department, Don B Huntley College of Agriculture, California State Polytechnic University, Pomona, CA 91768, USA.
| | - Gregorio San Pablo
- Nutrition and Food Science Department, Don B Huntley College of Agriculture, California State Polytechnic University, Pomona, CA 91768, USA.
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Jouve A, Cattaneo S, Capelli S, Stucchi M, Evangelisti C, Villa A, Prati L. CNF-Functionalization as Versatile Tool for Tuning Activity in Cellulose-Derived Product Hydrogenation. Molecules 2019; 24:E316. [PMID: 30654554 DOI: 10.3390/molecules24020316] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Revised: 01/11/2019] [Accepted: 01/12/2019] [Indexed: 11/27/2022] Open
Abstract
Carbon nanofibers (CNFs) have been functionalized by introducing O, N, and P containing groups in order to investigate the effect of support functionalization in Ru catalysed hydroxymethyl furfural (HMF) and levulinic acid (LA) hydrogenation. In the case of HMF, despite the fact that no effect on selectivity was observed (all the catalysts produced selectively gamma-valerolactone (GVL)), the functionalization strongly affected the activity of the reaction. O-containing and N-containing supports presented a higher activity compared to the bare support. On the contrary, in HMF hydrogenation, functionalization of the support did not have a beneficial effect on the activity of a Ru-catalysed reaction with respect to bare support and only CNFs-O behaved similarly to bare CNFs. In fact, when CNFs-N or CNFs-P were used as the supports, a lower activity was observed, as well as a change in selectivity in which the production of ethers (from the reaction with the solvent) greatly increased.
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15
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Alzen JL, Langdon LS, Otero VK. A logistic regression investigation of the relationship between the Learning Assistant model and failure rates in introductory STEM courses. Int J STEM Educ 2018; 5:56. [PMID: 30631745 PMCID: PMC6310447 DOI: 10.1186/s40594-018-0152-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Accepted: 12/10/2018] [Indexed: 06/02/2023]
Abstract
BACKGROUND Large introductory STEM courses historically have high failure rates, and failing such courses often leads students to change majors or even drop out of college. Instructional innovations such as the Learning Assistant model can influence this trend by changing institutional norms. In collaboration with faculty who teach large-enrollment introductory STEM courses, undergraduate learning assistants (LAs) use research-based instructional strategies designed to encourage active student engagement and elicit student thinking. These instructional innovations help students master the types of skills necessary for college success such as critical thinking and defending ideas. In this study, we use logistic regression with pre-existing institutional data to investigate the relationship between exposure to LA support in large introductory STEM courses and general failure rates in these same and other introductory courses at University of Colorado Boulder. RESULTS Our results indicate that exposure to LA support in any STEM gateway course is associated with a 63% reduction in odds of failure for males and a 55% reduction in odds of failure for females in subsequent STEM gateway courses. CONCLUSIONS The LA program appears related to lower course failure rates in introductory STEM courses, but each department involved in this study implements the LA program in different ways. We hypothesize that these differences may influence student experiences in ways that are not apparent in the current analysis, but more work is necessary to support this hypothesis. Despite this potential limitation, we see that the LA program is consistently associated with lower failure rates in introductory STEM courses. These results extend the research base regarding the relationship between the LA program and positive student outcomes.
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16
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Lamontagne-Kam DM, Chalil A, Aristizabal Henao JJ, Hogenhout SJ, Stark KD. Concentrations of docosahexaenoic acid are reduced in maternal liver, adipose, and heart in rats fed high-fat diets without docosahexaenoic acid throughout pregnancy. Prostaglandins Leukot Essent Fatty Acids 2018; 138:30-37. [PMID: 30392578 DOI: 10.1016/j.plefa.2018.10.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 10/03/2018] [Accepted: 10/04/2018] [Indexed: 11/20/2022]
Abstract
Fetal accretion for DHA is high during late pregnancy due to the brain growth spurt. Prior evidence suggests that DHA is mobilized from maternal liver and adipose to meet fetal accretion and physiological requirements. However, changes in the DHA levels of various maternal tissues throughout pregnancy and into lactation of mothers on diets with and without dietary DHA, and with a background dietary fatty acid profile that resembles human intake has not been examined. Sprague Dawley rats were fed a total western diet with (TWD + ) or without DHA (TWD-) along with a commercial rodent chow control (Chow) throughout pregnancy and postpartum. The fatty acid compositions of adipose, brain, heart, liver, erythrocytes, and plasma were determined before pregnancy, at 15 and 20 days of pregnancy, and 7 days postpartum. The placenta, fetuses, and pups were also examined when available. Maternal DHA concentrations were increased in plasma at 20 days pregnancy in all the diets with TWD + > Chow > TWD-. Maternal DHA concentrations in the TWD- group were lower in adipose throughout pregnancy as compared with the other diets. At postpartum, DHA concentrations decreased below baseline levels in the heart of the TWD- and Chow dams and the liver of the TWD- dams. Whole body DHA concentrations of the fetuses did not differ but there was evidence of decreased DHA in the whole body and tissues of the TWD- and Chow 7d old pups. In conclusion, it appears that in this rodent model of pregnancy, maternal adaptations were made to meet fetal DHA requirements, but they may compromise maternal DHA status and the ability to deliver DHA during lactation.
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Affiliation(s)
- Daniel M Lamontagne-Kam
- Department of Kinesiology, University of Waterloo, 200 University Avenue, Waterloo, ON, Canada, N2L 3G1
| | - Alan Chalil
- Department of Kinesiology, University of Waterloo, 200 University Avenue, Waterloo, ON, Canada, N2L 3G1
| | - Juan J Aristizabal Henao
- Department of Kinesiology, University of Waterloo, 200 University Avenue, Waterloo, ON, Canada, N2L 3G1
| | - Sam J Hogenhout
- Department of Kinesiology, University of Waterloo, 200 University Avenue, Waterloo, ON, Canada, N2L 3G1
| | - Ken D Stark
- Department of Kinesiology, University of Waterloo, 200 University Avenue, Waterloo, ON, Canada, N2L 3G1.
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Lee JH, Lee HJ, Sim DY, Jung JH, Kim KR, Kim SH. Apoptotic effect of lambertianic acid through AMPK/FOXM1 signaling in MDA-MB231 breast cancer cells. Phytother Res 2018; 32:1755-1763. [PMID: 29722086 DOI: 10.1002/ptr.6105] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 04/04/2018] [Accepted: 04/05/2018] [Indexed: 01/05/2023]
Abstract
Though lambertianic acid (LA) was known to exert antitumor effect in liver and prostate cancers, its underlying anticancer mechanism is never reported in breast cancers so far. Thus, in this study, apoptotic mechanism of LA was elucidated in MDA-MB-231 breast cancer cells. Here, LA increased cytotoxicity in MCF-7 and MDA-MB-231 cells; enhanced sub-G1 population, G2/M arrest, and cleaved poly(ADP-ribose) polymerase; activated phosphorylation of AMP-activated protein kinase (AMPK)/acetyl-CoA carboxylase pathway; and also suppressed phosphorylation of AKT and the expression of forkhead box M1 (FOXM1), X-linked inhibitor of apoptosis protein, B-cell lymphoma 2, and CyclinB1 in MDA-MB-231 cells. Furthermore, AMPK inhibitor compound C reversed the effect of LA on FOXM1, Cyclin B1, and cleaved poly(ADP-ribose) polymerase in MDA-MB-231 cells. Notably, immunoprecipitation revealed that LA disturbed the direct binding of AKT and FOXM1 in MDA-MB-231 cells. Overall, these findings suggest that LA-induced apoptosis is mediated via activation of AMPK and inhibition of AKT/FOXM1 signaling pathway.
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Affiliation(s)
- Jae Hee Lee
- College of Korean Medicine, Kyung Hee University, Seoul, 02447, South Korea
| | - Hyo-Jung Lee
- College of Korean Medicine, Kyung Hee University, Seoul, 02447, South Korea
| | - Deok Yong Sim
- College of Korean Medicine, Kyung Hee University, Seoul, 02447, South Korea
| | - Ji Hoon Jung
- College of Korean Medicine, Kyung Hee University, Seoul, 02447, South Korea
| | - Ka Ram Kim
- College of Korean Medicine, Kyung Hee University, Seoul, 02447, South Korea
| | - Sung-Hoon Kim
- College of Korean Medicine, Kyung Hee University, Seoul, 02447, South Korea
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18
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Top LM, Schoonraad SA, Otero VK. Development of pedagogical knowledge among learning assistants. Int J STEM Educ 2018; 5:1. [PMID: 30631691 PMCID: PMC6310379 DOI: 10.1186/s40594-017-0097-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Accepted: 12/06/2017] [Indexed: 06/02/2023]
Abstract
BACKGROUND Successful outcomes of the Learning Assistant (LA) model include increased learning outcomes in STEM gateway courses and increased persistence to graduation among LAs and the students they serve. While there are many possible reasons that the LA program is effective, the pedagogical development of the LAs themselves has not yet been systematically studied. The research reported here investigated how deeply first-time LAs enrolled in a one-semester pedagogy course took up the language associated with the course's essential pedagogical principles. By reviewing prior research as well as assessing our target population and our pedagogy course learning goals, we developed a set of three essential pedagogical principles that are critical for effective classroom instruction and developed a coding scheme for identifying these principles in LAs' written work. We then looked at LA's development of language with respect to these principles by analyzing weekly teaching reflections submitted by LAs during five iterations of our pedagogy course. RESULTS Our research indicated that the language used to introduce particular pedagogical principles might play an important role in initiating LAs' uptake of these concepts.We found that LAs began to develop an understanding of the language that values students' prior ideas in learning, but the depth of this understanding varied. In addition, LAs did not demonstrate as much growth in their language with respect to the formative assessment or to the idea that students play a role in constructing knowledge. CONCLUSIONS In developing a pedagogy course for LAs, relating to their prior backgrounds in STEM appears to be critical. Using language that is accessible seems to increase LAs' ability to develop pedagogical principles. Although LAs' development of language related to the essential pedagogical principles is small, it may be enough to allow them to create contexts that facilitate learning.
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Affiliation(s)
- Laken M. Top
- School of Education, University of Colorado Boulder, Boulder, CO 80309 USA
| | | | - Valerie K. Otero
- School of Education, University of Colorado Boulder, Boulder, CO 80309 USA
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Ko JA, Furuta N, Lim HB. Quantitative mapping of elements in basil leaves (Ocimum basilicum) based on cesium concentration and growth period using laser ablation ICP-MS. Chemosphere 2018; 190:368-374. [PMID: 29024882 DOI: 10.1016/j.chemosphere.2017.10.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 09/20/2017] [Accepted: 10/01/2017] [Indexed: 06/07/2023]
Abstract
Quantitative elemental mapping of metallic pollutants in sweet basil was studied by laser ablation (LA)-ICP-MS. For this, the sweet basil was cultivated in Hoagland nutrient solution spiked with 100 and 1000 ng mL-1 of Cs for 10-60 days. Then, the Cs distribution in collected leaves was determined by LA-ICP-MS using lab-synthesized standard pellets based on NIST 1573a tomato leaves. For comparison, S, Ca, and K were also simultaneously determined in this measurement with a13C+ signal from the leaves as an internal standard. The obtained calibration curves showed linear coefficient of determination (R2) of 0.991 for K and 0.999 for Cs. The concentration of Cs measured in the basil leaves increased with growth period and pollutant concentration, and accumulation followed the order of leaf margin, petiole, midrib, and veins. Although no visible symptom was detected, significant suppression of the growth rate was observed due to the presence of high-concentration Cs. The experimental model demonstrated herein showed potential for studying the influence of radioactive pollutants on plants and other organisms in the food chain.
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Affiliation(s)
- Jung Aa Ko
- Department of Chemistry, Dankook University, Yongin-si, Gyeonggi-do 448-701, South Korea; Future Environmental Research Center, Korea Institute of Toxicology, Jinju 660-844, South Korea
| | - Naoki Furuta
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo, Tokyo 112-8551, Japan
| | - Heung Bin Lim
- Department of Chemistry, Dankook University, Yongin-si, Gyeonggi-do 448-701, South Korea.
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Shikhagaie MM, Björklund ÅK, Mjösberg J, Erjefält JS, Cornelissen AS, Ros XR, Bal SM, Koning JJ, Mebius RE, Mori M, Bruchard M, Blom B, Spits H. Neuropilin-1 Is Expressed on Lymphoid Tissue Residing LTi-like Group 3 Innate Lymphoid Cells and Associated with Ectopic Lymphoid Aggregates. Cell Rep 2017; 18:1761-1773. [PMID: 28199847 PMCID: PMC5318658 DOI: 10.1016/j.celrep.2017.01.063] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 11/09/2016] [Accepted: 01/24/2017] [Indexed: 10/26/2022] Open
Abstract
Here, we characterize a subset of ILC3s that express Neuropilin1 (NRP1) and are present in lymphoid tissues, but not in the peripheral blood or skin. NRP1+ group 3 innate lymphoid cells (ILC3s) display in vitro lymphoid tissue inducer (LTi) activity. In agreement with this, NRP1+ ILC3s are mainly located in proximity to high endothelial venules (HEVs) and express cell surface molecules involved in lymphocyte migration in secondary lymphoid tissues via HEVs. NRP1 was also expressed on mouse fetal LTi cells, indicating that NRP1 is a conserved marker for LTi cells. Human NRP1+ ILC3s are primed cells because they express CD45RO and produce higher amounts of cytokines than NRP1- cells, which express CD45RA. The NRP1 ligand vascular endothelial growth factor A (VEGF-A) served as a chemotactic factor for NRP1+ ILC3s. NRP1+ ILC3s are present in lung tissues from smokers and patients with chronic obstructive pulmonary disease, suggesting a role in angiogenesis and/or the initiation of ectopic pulmonary lymphoid aggregates.
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Affiliation(s)
- Medya Mara Shikhagaie
- Department of Experimental Medicine, Academic Medical Center, University of Amsterdam, 1105 AZ Amsterdam, the Netherlands.
| | - Åsa K Björklund
- Department of Cell and Molecular Biology, Karolinska Institutet, 171 77 Stockholm, Sweden
| | - Jenny Mjösberg
- Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, 171 77 Stockholm, Sweden
| | - Jonas S Erjefält
- Unit of Airway Inflammation, Department of Experimental Medical Sciences, Lund University, 221 84 Lund, Sweden
| | - Anne S Cornelissen
- Department of Hematopoiesis, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, University of Amsterdam, 1006 AN Amsterdam, the Netherlands
| | - Xavier Romero Ros
- Department of Experimental Medicine, Academic Medical Center, University of Amsterdam, 1105 AZ Amsterdam, the Netherlands
| | - Suzanne M Bal
- Department of Experimental Medicine, Academic Medical Center, University of Amsterdam, 1105 AZ Amsterdam, the Netherlands
| | - Jasper J Koning
- Department of Molecular Cell Biology and Immunology, VU University Medical Center, 1081 HV Amsterdam, the Netherlands
| | - Reina E Mebius
- Department of Molecular Cell Biology and Immunology, VU University Medical Center, 1081 HV Amsterdam, the Netherlands
| | - Michiko Mori
- Unit of Airway Inflammation, Department of Experimental Medical Sciences, Lund University, 221 84 Lund, Sweden
| | - Melanie Bruchard
- Department of Experimental Medicine, Academic Medical Center, University of Amsterdam, 1105 AZ Amsterdam, the Netherlands
| | - Bianca Blom
- Department of Experimental Medicine, Academic Medical Center, University of Amsterdam, 1105 AZ Amsterdam, the Netherlands
| | - Hergen Spits
- Department of Experimental Medicine, Academic Medical Center, University of Amsterdam, 1105 AZ Amsterdam, the Netherlands.
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Mohan B, Chhabra ST, Gulati A, Mohan Mittal C, Mohan G, Tandon R, Kumbkarni S, Aslam N, Sood NK, Wander GS. Clinical and echocardiographic diagnosis, follow up and management of right-sided cardiac thrombi. Indian Heart J 2015; 65:529-35. [PMID: 24206876 DOI: 10.1016/j.ihj.2013.08.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2013] [Revised: 05/08/2013] [Accepted: 08/10/2013] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Right-sided cardiac masses are infrequent and have varied clinical presentation. The present study describes the clinical features, echocardiographic findings and management of 19 patients presenting with right-sided cardiac thrombi in a tertiary care center in north India. METHODS This is a retrospective, single center observational study of consecutive patients over the period January 2003-2008 admitted in our emergency intensive care unit (EICU). We identified 38 patients with right-sided cardiac masses admitted to EICU diagnosed by transthoracic echocardiography of which 19 patients had right-sided thrombus. The echocardiographic findings were reviewed by two cardiologists in all patients. Treatment was not standardized and choice of therapy was based on judgment of attending physician. RESULTS The mean age of patients with cardiac thrombus was 36.6 ± 11.8 years. Right atrial (n = 17) and right ventricle (n = 2) thrombi were associated with deep vein thrombosis (DVT) in 7 (36.8%) and pulmonary embolism in 3 (15%) patients. 13 (68.4%) patients appeared to have in situ mural thrombus. 12 patients were managed with oral anticoagulants, 3 patients underwent surgery and 4 patients were thrombolysed. All the survivors had a mean follow-up of 40 ± 6 months (range--18-50 months). CONCLUSIONS Prompt echocardiographic examination in an appropriate clinical setting facilitates faster diagnosis and management of patients with right-sided cardiac thrombi. High incidence of in situ mural thrombus and varied comorbidities predisposing to right-sided cardiac thrombi besides DVT and pulmonary embolism need to be recognized. Oral anticoagulation and thrombolysis appear to be the mainstay of treatment with surgery limited for selected patients.
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Affiliation(s)
- Bishav Mohan
- Department of Cardiology, Dayanand Medical College & Hospital, Unit Hero DMC Heart Institute, Ludhiana, Punjab, India.
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Evans SJ, Assari S, Harrington GJ, Chang YW, Burant CF, McInnis MG. P lasma linoleic acid partially mediates the association of bipolar disorder on self-reported mental health scales. J Psychiatr Res 2015; 68:61-7. [PMID: 26228402 DOI: 10.1016/j.jpsychires.2015.06.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 06/03/2015] [Accepted: 06/04/2015] [Indexed: 01/03/2023]
Abstract
We have shown that bipolar individuals have reduced quality diets, including lower intake of polyunsaturated fatty acids (PUFA). We have also reported reduced plasma levels of the n-6 PUFA, linoleic acid (LA), and the n-3 PUFA, eicosapentaenoic acid (EPA) in bipolar subjects. In the current analysis we hypothesized that LA and EPA plasma levels would mediate lower self-reported mental health and life functioning scores in bipolar subjects. In a cross-sectional study, we collected a 7-day diet record in bipolar (n = 56) and control subjects (n = 46) followed by a fasted blood draw. We used structured equation modeling path analysis to test for mediating effects of dietary intake and plasma levels of LA and EPA on self-reported mental health questionnaire scores, including the Life Functioning Questionnaire (LFQ), the Patient Health Questionnaire (PHQ9), and the Short Form Health Survey (SF12), extracting the mental health component summary score (SF12-MH). We adjusted for age, gender, psychiatric medication use, body mass index (BMI), and total caloric intake as covariates with bipolar disorder as the primary predictor. We found a significant path association from bipolar disorder to lower plasma LA levels (p = 0.03) and significant paths from plasma LA to PHQ9 (p = 0.05), LFQ (p = 0.01) and SF12-MH (p = 0.05) scores, such that lower plasma LA predicted worse outcomes. We found no significant paths from plasma EPA levels to any of the outcome measures. These findings suggest that plasma LA levels partially mediate the effect of bipolar disorder on self-reported measures of mental health and life functioning.
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Liu Z, Guo J, Sun H, Huang Y, Zhao R, Yang X. α-Lipoic acid attenuates LPS-induced liver injury by improving mitochondrial function in association with GR mitochondrial DNA occupancy. Biochimie 2015; 116:52-60. [PMID: 26133658 DOI: 10.1016/j.biochi.2015.06.023] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2015] [Accepted: 06/22/2015] [Indexed: 12/21/2022]
Abstract
α-Lipoic acid (LA) has been demonstrated to be a key regulator of energy metabolism. However, whether LA can protect the liver from inflammation, as well as the underlying mechanism involved, are still largely unclear. In the present study, mice treated with lipopolysaccharide (LPS) and injected with LA were used as a model. Liver injury, energy metabolism and mitochondrial regulation were investigated to assess the protective effect of LA on the liver and explore the possible mechanisms involved. Our results showed that LA attenuated liver injury, as evidenced by the decreased plasma alanine aminotransferase (ALT) and aspartate aminotransferase (AST) levels after LA treatment compared with the LPS-treated group. The hepatic ATP and NADH levels, expression levels of most mitochondrial DNA (mtDNA)-encoded genes as well as mitochondrial complex I, IV and V activities were all significantly increased in the LA-treated group compared with the LPS-treated group. Levels of Sirt3 protein, which is essential for the regulation of mitochondrial metabolism, were also increased in the LA-treated group. Regarding the regulation of mtDNA-encoded genes expression, we observed no obvious change in the methylation status of the mtDNA D-loop region. However, compared to the LPS-treated group, LA treatment increased glucocorticoid receptor (GR) protein expression in the liver, as well as the level of GR occupancy on the mtDNA D-loop region. Our study demonstrates that LA exerts a liver-protective effect in an inflammation state by improving mitochondrial function. Furthermore, to the best of our knowledge, we demonstrate for the first time that GR may be involved in this effect via an enhanced binding to the mtDNA transcriptional control region, thereby regulating the expression of mtDNA-encoded genes.
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Affiliation(s)
- Zhiqing Liu
- Key Laboratory of Animal Physiology & Biochemistry, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Jun Guo
- Key Laboratory of Animal Physiology & Biochemistry, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Hailin Sun
- Key Laboratory of Animal Physiology & Biochemistry, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Yanping Huang
- Key Laboratory of Animal Physiology & Biochemistry, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Ruqian Zhao
- Key Laboratory of Animal Physiology & Biochemistry, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Xiaojing Yang
- Key Laboratory of Animal Physiology & Biochemistry, Nanjing Agricultural University, Nanjing 210095, PR China.
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Santos CL, Bobermin LD, Souza DG, Bellaver B, Bellaver G, Arús BA, Souza DO, Gonçalves CA, Quincozes-Santos A. Lipoic acid and N-acetylcysteine prevent ammonia-induced inflammatory response in C6 astroglial cells: The putative role of ERK and HO1 signaling pathways. Toxicol In Vitro 2015; 29:1350-7. [PMID: 26043815 DOI: 10.1016/j.tiv.2015.05.023] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Revised: 05/03/2015] [Accepted: 05/30/2015] [Indexed: 02/05/2023]
Abstract
Hyperammonemia induces significant changes in the central nervous system (CNS) in direct association with astroglial functions, such as oxidative damage, glutamatergic excitotoxicity, and impaired glutamine synthetase (GS) activity and pro-inflammatory cytokine release. Classically, lipoic acid (LA) and N-acetylcysteine (NAC) exhibit antioxidant and anti-inflammatory activities by increasing glutathione (GSH) biosynthesis and decreasing pro-inflammatory mediator levels in glial cells. Thus, we evaluated the protective effects of LA and NAC against ammonia cytotoxicity in C6 astroglial cells. Ammonia decreased GSH levels and increased cytokine release and NFκB transcriptional activation. LA and NAC prevented these effects by the modulation of ERK and HO1 pathways. Taken together, these observations show that LA and NAC prevent the ammonia-induced inflammatory response.
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Affiliation(s)
- Camila Leite Santos
- Departamento de Bioquímica, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Larissa Daniele Bobermin
- Departamento de Bioquímica, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Débora Guerini Souza
- Departamento de Bioquímica, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Bruna Bellaver
- Departamento de Bioquímica, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Gabriela Bellaver
- Departamento de Bioquímica, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Bernardo Assein Arús
- Departamento de Bioquímica, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Diogo Onofre Souza
- Departamento de Bioquímica, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Carlos-Alberto Gonçalves
- Departamento de Bioquímica, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - André Quincozes-Santos
- Departamento de Bioquímica, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
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Wood KE, Mantzioris E, Gibson RA, Ramsden CE, Muhlhausler BS. The effect of modifying dietary LA and ALA intakes on omega-3 long chain polyunsaturated fatty acid (n-3 LCPUFA) status in human adults: a systematic review and commentary. Prostaglandins Leukot Essent Fatty Acids 2015; 95:47-55. [PMID: 25687496 PMCID: PMC9406118 DOI: 10.1016/j.plefa.2015.01.001] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Revised: 12/19/2014] [Accepted: 01/05/2015] [Indexed: 11/18/2022]
Abstract
This paper presents a systematic review of human studies investigating the effect of altering dietary omega-3 polyunsaturated fatty acid (n-3 PUFA) alpha-linolenic acid (ALA) and omega-6 polyunsaturated fatty acid (n-6 PUFA) linoleic acid (LA) intakes on n-3 long-chain polyunsaturated fatty acid (LCPUFA) status in adult humans. The results suggest that it is possible to increase n-3 LCPUFA status by reducing LA and/or increasing ALA intake in humans, although decreasing LA intake to below 2.5%E may be required to specifically increase levels of the n-3 LCPUFA docosahexaenoic acid (DHA). The majority of studies in this area to date have been relatively poor in quality, which limits the ability to draw robust conclusions, and we present a series of recommendations to improve the quality of future studies in fatty acid nutrition in humans.
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Affiliation(s)
- K E Wood
- FOODplus Research Centre, School of Agriculture, Food and Wine, The University of Adelaide, Adelaide, SA 5064, Australia
| | - E Mantzioris
- School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, SA 5001, Australia
| | - R A Gibson
- FOODplus Research Centre, School of Agriculture, Food and Wine, The University of Adelaide, Adelaide, SA 5064, Australia
| | - C E Ramsden
- Laboratory of Membrane Biochemistry and Biophysics, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD, USA
| | - B S Muhlhausler
- FOODplus Research Centre, School of Agriculture, Food and Wine, The University of Adelaide, Adelaide, SA 5064, Australia.
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Yang TY, Xu ZF, Liu W, Xu B, Deng Y, Li YH, Feng S. Alpha-lipoic acid protects against methylmercury-induced neurotoxic effects via inhibition of oxidative stress in rat cerebral cortex. Environ Toxicol Pharmacol 2015; 39:157-166. [PMID: 25522843 DOI: 10.1016/j.etap.2014.11.020] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Revised: 11/24/2014] [Accepted: 11/26/2014] [Indexed: 06/04/2023]
Abstract
MeHg is one of the environmental pollutants that lead to oxidative stress and an indirect excitotoxicity caused by altered glutamate (Glu) concentration. However, little was known of the interaction. Therefore, we developed a rat model of MeHg poisoning to explore its neurotoxic effects, and whether LA could attenuate MeHg-induced neurotoxicity. Seventy-two rats were randomly divided into four groups: control group, MeHg-treated groups (4 and 12μmol/kg), and LA pre-treatment group. Administration of the 12μmol/kg MeHg for 4 weeks significantly increased ROS formation that might be critical to aggravate oxidative damages in cerebral cortex. Meanwhile, Glu metabolism as well as GLAST and GLT-1 appeared to be disrupted by MeHg exposure. Pre-treatment of the 35μmol/kg LA significantly prevented MeHg-induced oxidative stress and Glu dyshomoestasis. In conclusion, findings indicated that MeHg could induce oxidative stress and Glu uptake/metabolism disorders in cerebral cortex, LA might antagonize these neurotoxic effects induced by MeHg.
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Affiliation(s)
- Tian-Yao Yang
- Department of Environmental Health, School of Public Health, China Medical University, Shenyang 110001, Liaoning Province, People's Republic of China
| | - Zhao-Fa Xu
- Department of Environmental Health, School of Public Health, China Medical University, Shenyang 110001, Liaoning Province, People's Republic of China.
| | - Wei Liu
- Department of Environmental Health, School of Public Health, China Medical University, Shenyang 110001, Liaoning Province, People's Republic of China
| | - Bin Xu
- Department of Environmental Health, School of Public Health, China Medical University, Shenyang 110001, Liaoning Province, People's Republic of China
| | - Yu Deng
- Department of Environmental Health, School of Public Health, China Medical University, Shenyang 110001, Liaoning Province, People's Republic of China
| | - Yue-Hui Li
- Department of Environmental Health, School of Public Health, China Medical University, Shenyang 110001, Liaoning Province, People's Republic of China
| | - Shu Feng
- Department of Environmental Health, School of Public Health, China Medical University, Shenyang 110001, Liaoning Province, People's Republic of China
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Laitman BM, Gajewski ND, Mann GL, Kubin L, Morrison AR, Ross RJ. The α1 adrenoceptor antagonist prazosin enhances sleep continuity in fear-conditioned Wistar-Kyoto rats. Prog Neuropsychopharmacol Biol Psychiatry 2014; 49:7-15. [PMID: 24246572 PMCID: PMC3969852 DOI: 10.1016/j.pnpbp.2013.11.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2013] [Revised: 11/06/2013] [Accepted: 11/06/2013] [Indexed: 11/16/2022]
Abstract
Fragmentation of rapid eye movement sleep (REMS) is well described in individuals with posttraumatic stress disorder (PTSD) and likely has significant functional consequences. Fear-conditioned rodents may offer an attractive model of the changes in sleep that characterize PTSD. Following fear conditioning (FC), Wistar-Kyoto (WKY) rats, a strain known to be particularly stress-sensitive, have increased REMS fragmentation that can be quantified as a shift in the distribution of REMS episodes towards the more frequent occurrence of sequential REMS (inter-REMS episode interval≤3 min) vs. single REMS (interval>3 min). The α1 adrenoceptor antagonist prazosin has demonstrated efficacy in normalizing sleep in PTSD. To determine the utility of fear-conditioned WKY rats as a model of sleep disturbances typical of PTSD and as a platform for the development of new treatments, we tested the hypothesis that prazosin would reduce REMS fragmentation in fear-conditioned WKY rats. Sleep parameters and freezing (a standard measure of anxiety in rodents) were quantified at baseline and on Days 1, 7, and 14 following FC, with either prazosin (0.01mg/kg, i.p.) or vehicle injections administered prior to testing in a between-group design. Fear conditioning was achieved by pairing tones with a mild electric foot shock (1.0mA, 0.5s). One, 7, and 14 days following FC, prazosin or vehicle was injected, the tone was presented, freezing was measured, and then sleep was recorded from 11 AM to 3 PM. WKY rats given prazosin, compared to those given vehicle, had a lower amount of seq-REMS relative to total REMS time 14 days after FC. They also had a shorter non-REMS latency and fewer non-REMS arousals at baseline and on Days 1 and 7 after FC. Thus, in FC rats, prazosin reduced both REMS fragmentation and non-REMS discontinuity.
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Affiliation(s)
- Benjamin M. Laitman
- Department of Animal Biology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA,Address correspondence to: Benjamin M. Laitman, The Graduate School of Biological Sciences, Mount Sinai School of Medicine, 1 Gustave L. Levy Place, New York, NY 10029, Tel. 516 2368979, Fax. 215 8235171 (Attn: Dr. Richard Ross),
| | - Nicholas D. Gajewski
- Department of Animal Biology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA
| | - Graziella L. Mann
- Department of Animal Biology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA
| | - Leszek Kubin
- Department of Animal Biology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA
| | - Adrian R. Morrison
- Department of Animal Biology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA
| | - Richard J. Ross
- Department of Animal Biology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA,Department of Psychiatry, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA,Veterans Affairs Medical Center, Philadelphia, PA
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Augustine AH, Lowenstein LM, Harris WS, Shearer GC, Block RC. Treatment with omega-3 fatty acid ethyl-ester alters fatty acid composition of lipoproteins in overweight or obese adults with insulin resistance. Prostaglandins Leukot Essent Fatty Acids 2014; 90:69-75. [PMID: 24378016 PMCID: PMC3959884 DOI: 10.1016/j.plefa.2013.12.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2013] [Revised: 11/28/2013] [Accepted: 12/09/2013] [Indexed: 11/26/2022]
Abstract
INTRODUCTION The effects of dietary fatty acid supplementation on lipoprotein fatty acid composition have rarely been described. PATIENTS AND METHODS Sixty-one overweight and obese adults with dyslipidemia and insulin resistance were randomized to placebo, 2g/day extended-release nicotinic acid (ERN), 4g/day prescription omega-3 fatty acid ethyl ester (P-OM3), or combination therapy for 16 weeks. Lipoprotein fatty acid composition was analyzed by gas chromatography pre- and post-treatment. RESULTS Treatment with P-OM3 or combination, but not ERN, increased proportions of eicosapentaenoic acid, docosahexaenoic acid, and docosapentaenoic acid, and reduced those for arachidonic acid in all lipoprotein fractions, with greatest impact in the high-density lipoprotein fraction. P-OM3-induced changes in eicosapentaenoic acid within low-density lipoproteins and very low-density lipoproteins were associated with beneficial effects on mean arterial pressure and pulse pressure. CONCLUSIONS P-OM3 supplementation, with or without ERN, was associated with differentially altered lipoprotein fatty acid composition and improved blood pressure parameters.
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Affiliation(s)
- Alicia H Augustine
- Department of Public Health Sciences, University of Rochester Medical Center, Rochester, NY, United States
| | - Lisa M Lowenstein
- Department of Public Health Sciences, University of Rochester Medical Center, Rochester, NY, United States
| | - William S Harris
- Cardiovascular Health Research Center, Sanford Research, Sioux Falls, SD, United States; Department of Internal Medicine, Sanford School of Medicine, University of South Dakota, Sioux Falls, SD, United States; Department of Basic Biomedical Sciences, Sanford School of Medicine, University of South Dakota, Sioux Falls, SD, United States
| | - Gregory C Shearer
- Cardiovascular Health Research Center, Sanford Research, Sioux Falls, SD, United States; Department of Internal Medicine, Sanford School of Medicine, University of South Dakota, Sioux Falls, SD, United States; Department of Basic Biomedical Sciences, Sanford School of Medicine, University of South Dakota, Sioux Falls, SD, United States
| | - Robert C Block
- Department of Public Health Sciences, University of Rochester Medical Center, Rochester, NY, United States; Department of Medicine, University of Rochester Medical Center, United States.
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Pearl DS, Masoodi M, Eiden M, Brümmer J, Gullick D, McKeever TM, Whittaker MA, Nitch-Smith H, Brown JF, Shute JK, Mills G, Calder PC, Trebble TM. Altered colonic mucosal avai lability of n-3 and n-6 polyunsaturated fatty acids in ulcerative colitis and the relationship to disease activity. J Crohns Colitis 2014; 8:70-9. [PMID: 23619007 DOI: 10.1016/j.crohns.2013.03.013] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2013] [Revised: 03/05/2013] [Accepted: 03/28/2013] [Indexed: 02/08/2023]
Abstract
BACKGROUND AND AIMS The polyunsaturated fatty acids (PUFA) arachidonic acid (AA, n-6) and eicosapentaenoic acid (EPA, n-3) are precursors of eicosanoids and other lipid mediators which have critical roles in inflammation. The mediators formed from the different PUFA have different potencies. We hypothesised that metabolic changes associated with colonic mucosal inflammation would modify the bioavailability of the eicosanoid precursors AA and EPA. METHODS Colonic mucosa biopsies were obtained from patients with ulcerative colitis and from matched controls. Inflammation was graded endoscopically and histologically. Esterified and non-esterified fatty acids were determined within the biopsies using gas chromatography-mass spectrometry and liquid chromatography-mass spectrometry, respectively. RESULTS Biopsy samples were collected from 69 UC patients (54 providing both inflamed and non-inflamed mucosa) and 69 controls. Inflamed mucosa had higher AA (p<0.001) and lower EPA (p<0.010) contents and a higher AA:EPA ratio (p<0.001). Inflamed mucosa also had higher docosapentaenoic acid (DPA) and docosahexaenoic acid (DHA) and lower linoleic acid (LA) and α-linolenic acid (α-LNA) contents (all p<0.001), compared to non-inflamed and controls. There were significant correlations between severity of inflammation and contents of AA, DPA and DHA (positive correlations) and of LA, α-LNA and EPA (negative correlations). CONCLUSIONS Higher AA, AA:EPA ratio, DPA and DHA and lower LA, α-LNA and EPA are seen in inflamed mucosa in UC and correlate with severity of inflammation. This suggests an alteration in fatty acid metabolism in the inflamed gut mucosa, which may offer novel targets for intervention and should be considered if nutritional strategies are used.
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Abstract
Kikuchi disease is a self-limited disorder of unknown etiology characterized by focal painful lymphadenitis, fever, and weight loss that can be mistaken for malignancy. Diagnosis is established by node biopsy. Kikuchi disease is endemic in Asia; 10 cases have been reported in the US to date. We report 3 cases and review other US cases.
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Affiliation(s)
- Henry M Feder
- Departments of Family Medicine and Pediatrics, University of Connecticut Health Center, Farmington, CT.
| | - Jinli Liu
- Department of Pathology and Laboratory Medicine, Hartford Hospital, Hartford, CT
| | - William N Rezuke
- Department of Pathology and Laboratory Medicine, Hartford Hospital, Hartford, CT
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Hahn RT, Abraham T, Adams MS, Bruce CJ, Glas KE, Lang RM, Reeves ST, Shanewise JS, Siu SC, Stewart W, Picard MH. Guidelines for performing a comprehensive transesophageal echocardiographic examination: recommendations from the American Society of Echocardiography and the Society of Cardiovascular Anesthesiologists. J Am Soc Echocardiogr 2013; 26:921-64. [PMID: 23998692 DOI: 10.1016/j.echo.2013.07.009] [Citation(s) in RCA: 723] [Impact Index Per Article: 65.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Sakai K. Single unit activity of the suprachiasmatic nucleus and surrounding neurons during the wake-sleep cycle in mice. Neuroscience 2013; 260:249-64. [PMID: 24355494 DOI: 10.1016/j.neuroscience.2013.12.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Revised: 11/18/2013] [Accepted: 12/07/2013] [Indexed: 01/22/2023]
Abstract
The suprachiasmatic nucleus (SCN) of the mammalian hypothalamus contains a circadian clock for timing of diverse neuronal, endocrine, and behavioral rhythms, such as the cycle of sleep and wakefulness. Using extracellular single unit recordings, we have determined, for the first time, the discharge activity of individual SCN neurons during the complete wake-sleep cycle in non-anesthetized, head restrained mice. SCN neurons (n=79) were divided into three types according to their regular (type I; n=38) or irregular (type II; n=19) discharge activity throughout the wake-sleep cycle or their quiescent activity during waking and irregular discharge activity during sleep (type III; n=22). The type I and II neurons displayed a long-duration action potential, while the type III neurons displayed either a short-duration or long-duration action potential. The type I neurons discharged exclusively as single isolated spikes, whereas the type II and III neurons fired as single isolated spikes, clusters, or bursts. The type I and II neurons showed wake-active, wake/paradoxical (or rapid eye movement) sleep-active, or state-unrelated activity profiles and were, respectively, mainly located in the ventral or dorsal region of the SCN. In contrast, the type III neurons displayed sleep-active discharge profiles and were mainly located in the lateral region of the SCN. The majority of type I and II neurons tested showed an increase in discharge rate following application of light to the animal's eyes. Of the 289 extra-SCN neurons recorded, those displaying sleep-active discharge profiles were mainly located dorsal to the SCN, whereas those displaying wake-active discharge profiles were mainly located lateral or dorsolateral to the SCN. This study shows heterogeneity of mouse SCN and surrounding anterior hypothalamic neurons and suggests differences in their topographic organization and roles in mammalian circadian rhythms and the regulation of sleep and wakefulness.
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Affiliation(s)
- K Sakai
- Integrative Physiology of the Brain Arousal System, Lyon Neuroscience Research Center, INSERM U1028-CNRS UMR5292, School of Medicine, Claude Bernard University Lyon 1, F-69373 Lyon, France.
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Wang B, Van Veldhoven PP, Brees C, Rubio N, Nordgren M, Apanasets O, Kunze M, Baes M, Agostinis P, Fransen M. Mitochondria are targets for peroxisome-derived oxidative stress in cultured mammalian cells. Free Radic Biol Med 2013; 65:882-894. [PMID: 23988789 DOI: 10.1016/j.freeradbiomed.2013.08.173] [Citation(s) in RCA: 101] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Revised: 08/13/2013] [Accepted: 08/19/2013] [Indexed: 12/16/2022]
Abstract
Many cellular processes are driven by spatially and temporally regulated redox-dependent signaling events. Although mounting evidence indicates that organelles such as the endoplasmic reticulum and mitochondria can function as signaling platforms for oxidative stress-regulated pathways, little is known about the role of peroxisomes in these processes. In this study, we employ targeted variants of the genetically encoded photosensitizer KillerRed to gain a better insight into the interplay between peroxisomes and cellular oxidative stress. We show that the phototoxic effects of peroxisomal KillerRed induce mitochondria-mediated cell death and that this process can be counteracted by targeted overexpression of a select set of antioxidant enzymes, including peroxisomal glutathione S-transferase kappa 1, superoxide dismutase 1, and mitochondrial catalase. We also present evidence that peroxisomal disease cell lines deficient in plasmalogen biosynthesis or peroxisome assembly are more sensitive to KillerRed-induced oxidative stress than control cells. Collectively, these findings confirm and extend previous observations suggesting that disturbances in peroxisomal redox control and metabolism can sensitize cells to oxidative stress. In addition, they lend strong support to the ideas that peroxisomes and mitochondria share a redox-sensitive relationship and that the redox communication between these organelles is not only mediated by diffusion of reactive oxygen species from one compartment to the other. Finally, these findings indicate that mitochondria may act as dynamic receivers, integrators, and transmitters of peroxisome-derived mediators of oxidative stress, and this may have profound implications for our views on cellular aging and age-related diseases.
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Affiliation(s)
- Bo Wang
- Laboratory of Lipid Biochemistry and Protein Interactions, Katholieke Universiteit Leuven, 3000 Leuven, Belgium
| | - Paul P Van Veldhoven
- Laboratory of Lipid Biochemistry and Protein Interactions, Katholieke Universiteit Leuven, 3000 Leuven, Belgium
| | - Chantal Brees
- Laboratory of Lipid Biochemistry and Protein Interactions, Katholieke Universiteit Leuven, 3000 Leuven, Belgium
| | - Noemí Rubio
- Laboratory of Cell Death Research and Therapy, Department of Cellular and Molecular Medicine, Katholieke Universiteit Leuven, 3000 Leuven, Belgium
| | - Marcus Nordgren
- Laboratory of Lipid Biochemistry and Protein Interactions, Katholieke Universiteit Leuven, 3000 Leuven, Belgium
| | - Oksana Apanasets
- Laboratory of Lipid Biochemistry and Protein Interactions, Katholieke Universiteit Leuven, 3000 Leuven, Belgium
| | - Markus Kunze
- Center for Brain Research, Medical University of Vienna, 1090 Vienna, Austria
| | - Myriam Baes
- Laboratory of Cell Metabolism, Department of Pharmaceutical and Pharmacological Sciences, Katholieke Universiteit Leuven, 3000 Leuven, Belgium
| | - Patrizia Agostinis
- Laboratory of Cell Death Research and Therapy, Department of Cellular and Molecular Medicine, Katholieke Universiteit Leuven, 3000 Leuven, Belgium
| | - Marc Fransen
- Laboratory of Lipid Biochemistry and Protein Interactions, Katholieke Universiteit Leuven, 3000 Leuven, Belgium.
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Rubenstein JH, Morgenstern H, Mcconell D, Scheiman JM, Schoenfeld P, Appelman H, Mcmahon LF, Kao JY, Metko V, Zhang M, Inadomi JM. Associations of diabetes mellitus, insulin, leptin, and ghrelin with gastroesophageal reflux and Barrett's esophagus. Gastroenterology 2013; 145:1237-44.e1-5. [PMID: 23999171 PMCID: PMC3914630 DOI: 10.1053/j.gastro.2013.08.052] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2013] [Revised: 08/20/2013] [Accepted: 08/27/2013] [Indexed: 02/07/2023]
Abstract
BACKGROUND & AIMS Insulin and leptin have proliferative and anti-apoptotic effects. Ghrelin promotes gastric emptying and secretion of growth hormone and inhibits inflammation. We assessed whether diabetes mellitus and serum levels of insulin, leptin, and ghrelin are associated with gastroesophageal reflux disease (GERD) and Barrett's esophagus. METHODS We conducted a case-control study in 822 men undergoing colorectal cancer screening who were recruited to also undergo upper endoscopy. We identified 70 with Barrett's esophagus; 80 additional men with Barrett's esophagus were recruited shortly after their clinical diagnoses. Serum levels of insulin, leptin, and ghrelin were assayed in all 104 fasting men with Barrett's esophagus without diabetes and 271 without diabetes or Barrett's esophagus. Logistic regression was used to estimate the effects of diabetes and levels of insulin, leptin, and ghrelin on GERD and Barrett's esophagus. RESULTS Among men with GERD, diabetes was inversely associated with Barrett's esophagus (adjusted odds ratio [OR] = 0.383; 95% confidence interval [CI]: 0.179-0.821). Among nondiabetics, hyperinsulinemia was positively associated with Barrett's esophagus, but the association was attenuated by adjustment for leptin and ghrelin. Leptin was positively associated with Barrett's esophagus, adjusting for obesity, GERD, and levels of insulin and ghrelin (OR for 3(rd) vs 1(st) tertile = 3.25; 95% CI: 1.29-8.17); this association was stronger in men with GERD (P = .01 for OR heterogeneity). Ghrelin was positively associated with Barrett's esophagus (OR for an increment of 400 pg/mL = 1.39; 95% CI: 1.09-1.76), but inversely associated with GERD (OR for 3(rd) vs 1(st) tertile = 0.364; 95% CI: 0.195-0.680). CONCLUSIONS Based on a case-control study, leptin was associated with Barrett's esophagus, particularly in men with GERD. Serum insulin level was associated with Barrett's esophagus, but might be mediated by leptin. Serum ghrelin was inversely associated with GERD, as hypothesized, but positively associated with Barrett's esophagus, contrary to our hypothesis. Additional studies are needed in men and women to replicate these findings.
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Affiliation(s)
- Joel H. Rubenstein
- Center for Clinical Management Research, Ann Arbor Veterans Affairs Medical Center, Ann Arbor, Michigan,Division of Gastroenterology, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, Michigan
| | - Hal Morgenstern
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, Michigan,Department of Environmental Health Sciences, School of Public Health, University of Michigan, Ann Arbor, Michigan,Department of Urology, University of Michigan Medical School, Ann Arbor, Michigan
| | - Daniel Mcconell
- Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, Michigan
| | - James M. Scheiman
- Division of Gastroenterology, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, Michigan
| | - Philip Schoenfeld
- Center for Clinical Management Research, Ann Arbor Veterans Affairs Medical Center, Ann Arbor, Michigan,Division of Gastroenterology, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, Michigan
| | - Henry Appelman
- Department of Pathology, University of Michigan Medical School, Ann Arbor, Michigan
| | - Laurence F. Mcmahon
- Division of General Internal Medicine, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, Michigan
| | - John Y. Kao
- Division of Gastroenterology, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, Michigan
| | - Val Metko
- Division of Gastroenterology, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, Michigan
| | - Min Zhang
- Division of Gastroenterology, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, Michigan
| | - John M. Inadomi
- Division of Gastroenterology, Department of Internal Medicine, University of Washington Medical School, Seattle, Washington
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Cohen G, Riahi Y, Sunda V, Deplano S, Chatgilialoglu C, Ferreri C, Kaiser N, Sasson S. Signaling properties of 4-hydroxyalkenals formed by lipid peroxidation in diabetes. Free Radic Biol Med 2013; 65:978-987. [PMID: 23973638 DOI: 10.1016/j.freeradbiomed.2013.08.163] [Citation(s) in RCA: 265] [Impact Index Per Article: 24.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Revised: 08/11/2013] [Accepted: 08/13/2013] [Indexed: 11/29/2022]
Abstract
Peroxidation of polyunsaturated fatty acids is intensified in cells subjected to oxidative stress and results in the generation of various bioactive compounds, of which 4-hydroxyalkenals are prominent. During the progression of type 2 diabetes mellitus, the ensuing hyperglycemia promotes the generation of reactive oxygen species (ROS) that contribute to the development of diabetic complications. It has been suggested that ROS-induced lipid peroxidation and the resulting 4-hydroxyalkenals markedly contribute to the development and progression of these pathologies. Recent findings, however, also suggest that noncytotoxic levels of 4-hydroxyalkenals play important signaling functions in the early phase of diabetes and act as hormetic factors to induce adaptive and protective responses in cells, enabling them to function in the hyperglycemic milieu. Our studies and others' have proposed such regulatory functions for 4-hydroxynonenal and 4-hydroxydodecadienal in insulin secreting β-cells and vascular endothelial cells, respectively. This review presents and discusses the mechanisms regulating the generation of 4-hydroxyalkenals under high glucose conditions and the molecular interactions underlying the reciprocal transition from hormetic to cytotoxic agents.
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Affiliation(s)
- Guy Cohen
- Department of Pharmacology, Institute for Drug Research, Faculty of Medicine, The Hebrew University, Jerusalem Israel
| | - Yael Riahi
- Department of Pharmacology, Institute for Drug Research, Faculty of Medicine, The Hebrew University, Jerusalem Israel
| | - Valentina Sunda
- Lipinutragen srl, Lipidomic Laboratory, Consiglio Nazionale delle Ricerche, Bologna, Italy
| | - Simone Deplano
- Lipinutragen srl, Lipidomic Laboratory, Consiglio Nazionale delle Ricerche, Bologna, Italy
| | | | - Carla Ferreri
- ISOF, Consiglio Nazionale delle Ricerche, Bologna, Italy
| | - Nurit Kaiser
- Endocrinology & Metabolism Service, The Hebrew University-Hadassah Faculty of Medicine, Jerusalem, Israel
| | - Shlomo Sasson
- Department of Pharmacology, Institute for Drug Research, Faculty of Medicine, The Hebrew University, Jerusalem Israel.
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Neilan TG, Mongeon FP, Shah RV, Coelho-Filho O, Abbasi SA, Dodson JA, McMullan CJ, Heydari B, Michaud GF, John RM, Blankstein R, Jerosch-Herold M, Kwong RY. Myocardial extracellular volume expansion and the risk of recurrent atrial fibrillation after pulmonary vein isolation. JACC Cardiovasc Imaging 2013; 7:1-11. [PMID: 24290570 DOI: 10.1016/j.jcmg.2013.08.013] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2013] [Accepted: 08/12/2013] [Indexed: 01/01/2023]
Abstract
OBJECTIVES This study tested whether myocardial extracellular volume (ECV) is increased in patients with hypertension and atrial fibrillation (AF) undergoing pulmonary vein isolation and whether there is an association between ECV and post-procedural recurrence of AF. BACKGROUND Hypertension is associated with myocardial fibrosis, an increase in ECV, and AF. Data linking these findings are limited. T1 measurements pre-contrast and post-contrast in a cardiac magnetic resonance (CMR) study provide a method for quantification of ECV. METHODS Consecutive patients with hypertension and recurrent AF referred for pulmonary vein isolation underwent a contrast CMR study with measurement of ECV and were followed up prospectively for a median of 18 months. The endpoint of interest was late recurrence of AF. RESULTS Patients had elevated left ventricular (LV) volumes, LV mass, left atrial volumes, and increased ECV (patients with AF, 0.34 ± 0.03; healthy control patients, 0.29 ± 0.03; p < 0.001). There were positive associations between ECV and left atrial volume (r = 0.46, p < 0.01) and LV mass and a negative association between ECV and diastolic function (early mitral annular relaxation [E'], r = -0.55, p < 0.001). In the best overall multivariable model, ECV was the strongest predictor of the primary outcome of recurrent AF (hazard ratio: 1.29; 95% confidence interval: 1.15 to 1.44; p < 0.0001) and the secondary composite outcome of recurrent AF, heart failure admission, and death (hazard ratio: 1.35; 95% confidence interval: 1.21 to 1.51; p < 0.0001). Each 10% increase in ECV was associated with a 29% increased risk of recurrent AF. CONCLUSIONS In patients with AF and hypertension, expansion of ECV is associated with diastolic function and left atrial remodeling and is a strong independent predictor of recurrent AF post-pulmonary vein isolation.
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Affiliation(s)
- Tomas G Neilan
- Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts; Division of Cardiology, Department of Medicine, Cardiac MR PET CT Program, Division of Radiology, Massachusetts General Hospital, Boston, Massachusetts
| | - Francois-Pierre Mongeon
- Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts; Department of Medicine, Montreal Heart Institute, University of Montreal, Montreal, Quebec, Canada
| | - Ravi V Shah
- Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts; Division of Cardiology, Department of Medicine, Cardiac MR PET CT Program, Division of Radiology, Massachusetts General Hospital, Boston, Massachusetts
| | - Otavio Coelho-Filho
- Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts; Department of Internal Medicine, State University of Campinas (UNICAMP), Campinas, São Paulo, Brazil
| | - Siddique A Abbasi
- Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - John A Dodson
- Division of Aging, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Ciaran J McMullan
- Division of Nephrology, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Bobak Heydari
- Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Gregory F Michaud
- Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Roy M John
- Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Ron Blankstein
- Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Michael Jerosch-Herold
- Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Raymond Y Kwong
- Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts.
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Tserendejid Z, Hwang J, Lee J, Park H. The consumption of more vegetables and less meat is associated with higher levels of acculturation among Mongolians in South Korea. Nutr Res 2013; 33:1019-25. [PMID: 24267041 DOI: 10.1016/j.nutres.2013.09.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2012] [Revised: 08/27/2013] [Accepted: 09/03/2013] [Indexed: 11/28/2022]
Abstract
Although Mongolian immigrants are a rapidly growing population in South Korea, the 2 countries have distinct diets because of climatic and geographical differences. The Mongolian diet is mostly animal-based with few vegetables and fruits, whereas the Korean diet is largely plant based. The purpose of this study was to examine the association between acculturation and dietary intakes among Mongolians living in South Korea. We hypothesized that higher levels of acculturation would be associated with higher vegetable, fruit, and plant-based food intakes among Mongolian immigrants. A total of 500 Mongolian immigrants participated in this study conducted between December 2010 and May 2011. To measure the acculturation level, we developed an acculturation scale based on the Suinn-Lew Asian self-identity acculturation scale. Dietary intakes were assessed using the 24-hour dietary recall method. Associations between acculturation and dietary intakes were investigated using a general linear model adjusted for demographic characteristics. The participants were grouped into either a low-acculturation group or a high-acculturation group. The high-acculturation group reported significantly higher consumption of vegetables and rice and significantly lower consumption of meat, potatoes, and flour products compared with their low-acculturation counterparts. However, a higher level of acculturation was also significantly related to a higher intake of sodium. These findings could be used to tailor nutrition programs to different acculturation levels.
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Affiliation(s)
- Zuunnast Tserendejid
- Department of Food and Nutrition, Myongji University, Gyeonggi-do 449-728, South Korea
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Okamoto Y, Kawamura K, Nakamura Y, Ono K. Pathological impact of hyperpo larization-activated chloride current peculiar to rat pulmonary vein cardiomyocytes. J Mol Cell Cardiol 2014; 66:53-62. [PMID: 24239603 DOI: 10.1016/j.yjmcc.2013.11.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Revised: 10/28/2013] [Accepted: 11/04/2013] [Indexed: 01/10/2023]
Abstract
Pulmonary veins (PVs) are believed to be a crucial origin of atrial fibrillation. We recently reported that rat PV cardiomyocytes exhibit arrhythmogenic automaticity in response to norepinephrine. Herein, we further characterized the electrophysiological properties underlying the potential arrhythmogenicity of PV cardiomyocytes. Patch clamping studies revealed a time dependent hyperpolarization-activated inward current in rat PV cardiomyocytes, but not in left atrial (LA) myocytes. The current was Cs(+) resistant, and was not affected by removal of external Na(+) or K(+). The current was inhibited with Cd(2+), and the reversal potential was sensitive to changes in [Cl(-)] on either side of the membrane in a manner consistent with a Cl(-) selective channel. Cl(-) channel blockers attenuated the current, and slowed or completely inhibited the norepinephrine-induced automaticity. The biophysical properties of the hyperpolarization-activated Cl(-) current in rat PVs were different from those of ClC-2 currents previously reported: (i) the voltage-dependent activation of the Cl(-) current in rat PVs was shifted to negative potentials as [Cl(-)]i increased, (ii) the Cl(-) current was enhanced by extracellular acidification, and (iii) extracellular hyper-osmotic stress increased the current, whereas hypo-osmotic cell swelling suppressed the current. qPCR analysis revealed negligible ClC-2 mRNA expression in the rat PV. These findings suggest that rat PV cardiomyocytes possess a peculiar voltage-dependent Cl(-) channel, and that the channel may play a functional role in norepinephrine-induced automaticity.
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Mesher D, Soldan K, Howell-Jones R, Panwar K, Manyenga P, Jit M, Beddows S, Gill ON. Reduction in HPV 16/18 prevalence in sexually active young women following the introduction of HPV immunisation in Eng land. Vaccine 2013; 32:26-32. [PMID: 24211166 PMCID: PMC3898718 DOI: 10.1016/j.vaccine.2013.10.085] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Revised: 10/21/2013] [Accepted: 10/24/2013] [Indexed: 12/12/2022]
Abstract
We monitor HPV infection in sexually active young women in England. The prevalence of HPV 16/18 has reduced within 3 years of HPV immunisation. Reductions in HPV 16/18 were greatest at ages with highest immunisation coverage. The data suggest reductions in HPV 16/18 amongst unvaccinated young women and men.
Background Reduction in the prevalence of vaccine type HPV infection in young women is an early indication of the impact of the HPV immunisation programme and a necessary outcome if the subsequent impact on cervical cancer is to be realised. Methods Residual vulva-vaginal swab (VVS) specimens from young women aged 16–24 years undergoing chlamydia screening in community sexual health services (formerly known as family planning clinics), general practice (GP), and youth clinics in 2010–2012 were submitted from 10 laboratories in seven regions around England. These specimens were linked to demographic and sexual behaviour data reported with the chlamydia test, anonymised, and tested for type-specific HPV DNA using a multiplex PCR and Luminex-based genotyping test. Estimated immunisation coverage was calculated and findings were compared to a baseline survey conducted prior to the introduction of HPV immunisation in 2008. Results A total of 4664 eligible specimens were collected and 4178 had a valid test result. The post-immunisation prevalence of HPV 16/18 infection was lowest in this youngest age group (16–18 years) and increased with age. This increase with age was a reversal of the pattern seen prior to immunisation and was inversely associated with estimates of age-specific immunisation coverage (65% for 16–18 year olds). The prevalence of HPV 16/18 infection in the post-immunisation survey was 6.5% amongst 16–18 year olds, compared to 19.1% in the similar survey conducted prior to the introduction of HPV immunisation. Conclusions These findings are the first indication that the national HPV immunisation programme is successfully preventing HPV 16/18 infection in sexually active young women in England. The reductions seen suggest, for the estimated coverage, high vaccine effectiveness and some herd-protection benefits. Continued surveillance is needed to determine the effects of immunisation on non-vaccine HPV types.
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Affiliation(s)
- D Mesher
- Public Health England, HIV & STI Department, 61 Colindale Avenue, London NW9 5EQ, UK.
| | - K Soldan
- Public Health England, HIV & STI Department, 61 Colindale Avenue, London NW9 5EQ, UK
| | - R Howell-Jones
- Public Health England, HIV & STI Department, 61 Colindale Avenue, London NW9 5EQ, UK
| | - K Panwar
- Public Health England, Virus Reference Department, 61 Colindale Avenue, London NW9 5EQ, UK
| | - P Manyenga
- Public Health England, Virus Reference Department, 61 Colindale Avenue, London NW9 5EQ, UK
| | - M Jit
- Public Health England, Statistics and Modelling Economics Department, 61 Colindale Avenue, London NW9 5EQ, UK
| | - S Beddows
- Public Health England, Virus Reference Department, 61 Colindale Avenue, London NW9 5EQ, UK
| | - O N Gill
- Public Health England, HIV & STI Department, 61 Colindale Avenue, London NW9 5EQ, UK
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Hoganson DM, Gazit AZ, Boston US, Sweet SC, Grady RM, Huddleston CB, Eghtesady P. Paracorporeal lung assist devices as a bridge to recovery or lung transp lantation in neonates and young children. J Thorac Cardiovasc Surg 2013; 147:420-6. [PMID: 24199759 DOI: 10.1016/j.jtcvs.2013.08.078] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2013] [Revised: 08/16/2013] [Accepted: 08/27/2013] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To evaluate paracorporeal lung assist devices to treat neonates and children with decompensated respiratory failure as a bridge to recovery or lung transplantation. METHODS One neonate (23 days old) and 3 young children (aged 2, 9, and 23 months) presented with primary lung disease with pulmonary hypertension, including alveolar capillary dysplasia in 2 and right pulmonary hypoplasia and primary pulmonary hypertension in 1. The patients were listed for lung transplantation but decompensated and required extracorporeal membrane oxygenation (ECMO). The patients were transitioned from ECMO to a pumpless paracorporeal lung assist device (Maquet Quadrox-iD oxygenator in 3, Novalung in 1) with inflow from the pulmonary artery and return to the left atrium. RESULTS The patients were weaned from ECMO and supported by the device for 44 ± 29 days (range, 5-74). Three patients were extubated while supported by the device (after 9, 15, and 72 days). One patient was bridged to lung transplant (9 months old, with alveolar capillary dysplasia, supported 5 days). One patient was bridged to recovery with maximal medical therapy (23 months old, with primary pulmonary hypertension, supported 23 days). Two patients died while awaiting a suitable lung donor after a support time of 54 and 72 days. CONCLUSIONS Pediatric patients bridged from ECMO to lung transplantation have poor results. An alternative method for longer term respiratory support was necessary as a bridge for these patients. The use of a paracorporeal lung assist device successfully supported 4 patients to recovery, lung transplantation, or past the average wait time for pediatric donor lungs (27 days). This therapy has the potential to bridge children with decompensated respiratory failure to lung transplantation.
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Affiliation(s)
- David M Hoganson
- Division of Cardiothoracic Surgery, Department of Surgery, St Louis Children's Hospital and Washington University, St Louis, Mo
| | - Avihu Z Gazit
- Division of Critical Care, St Louis Children's Hospital and Washington University, St Louis, Mo; Division of Cardiology, St Louis Children's Hospital and Washington University, St Louis, Mo
| | - Umar S Boston
- Division of Cardiothoracic Surgery, Department of Surgery, St Louis Children's Hospital and Washington University, St Louis, Mo
| | - Stuart C Sweet
- Division of Allergy, Immunology, and Pulmonary Medicine, Department of Pediatrics, St Louis Children's Hospital and Washington University, St Louis, Mo
| | - R Mark Grady
- Division of Cardiology, St Louis Children's Hospital and Washington University, St Louis, Mo
| | - Charles B Huddleston
- Division of Pediatric Cardiothoracic Surgery, Department of Surgery, St Louis University, St Louis, Mo
| | - Pirooz Eghtesady
- Division of Cardiothoracic Surgery, Department of Surgery, St Louis Children's Hospital and Washington University, St Louis, Mo.
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Igarashi M, Chang L, Ma K, Rapoport SI. Kinetics of eicosapentaenoic acid in brain, heart and liver of conscious rats fed a high n-3 PUFA containing diet. Prostaglandins Leukot Essent Fatty Acids 2013; 89:403-12. [PMID: 24209500 PMCID: PMC5861380 DOI: 10.1016/j.plefa.2013.09.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2013] [Revised: 09/07/2013] [Accepted: 09/07/2013] [Indexed: 01/06/2023]
Abstract
Eicosapentaenoic acid (EPA, 20:5n-3), a precursor of docosahexaenoic acid (DHA), may benefit cardiovascular and brain health. Quantifying EPA's in vivo kinetics might elucidate these effects. [1-(14)C]EPA was infused i.v. for 5min in unanesthetized male rats fed a standard EPA-DHA diet. Plasma and microwaved tissue were analyzed. Kinetic parameters were calculated using our compartmental model. At 5min, 31-48% of labeled EPA in brain and heart was oxidized, 7% in liver. EPA incorporation rates from brain and liver precursor EPA-CoA pools into lipids, mainly phospholipids, were 36 and 2529nmol/s/g×10(-4), insignificant for heart. Deacylation-reacylation half-lives were 22h and 38-128min. Conversion rates to DHA equaled 0.65 and 25.1nmol/s/g×10(-4), respectively. The low brain concentration and incorporation rate and high oxidation of EPA suggest that, if EPA has a beneficial effect in brain, it might result from its suppression of peripheral inflammation and hepatic conversion to bioactive DHA.
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Affiliation(s)
- Miki Igarashi
- Brain Physiology and Metabolism Section, National Institute on Aging, National Institutes of Health, Building 9, Room 1S126, Bethesda, MD 20892, USA.
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Di Matteo F, Martino M, Rea R, Pandolfi M, Panzera F, Stigliano E, Schena E, Saccomandi P, Silvestri S, Pacella CM, Breschi L, Perrone G, Coppola R, Costamagna G. US-guided application of Nd:YAG laser in porcine pancreatic tissue: an ex vivo study and numerical simulation. Gastrointest Endosc 2013; 78:750-5. [PMID: 23680175 DOI: 10.1016/j.gie.2013.04.178] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Accepted: 04/15/2013] [Indexed: 12/11/2022]
Abstract
BACKGROUND Laser ablation (LA) with a neodymium-doped yttrium aluminum garnet (Nd:YAG) laser is a minimally invasive approach able to achieve a high rate of complete tissue necrosis. In a previous study we described the feasibility of EUS-guided Nd:YAG pancreas LA performed in vivo in a porcine model. OBJECTIVE To establish the best laser setting of Nd:YAG lasers for pancreatic tissue ablation. A secondary aim was to investigate the prediction capability of a mathematical model on ablation volume. DESIGN Ex vivo animal study. SETTING Hospital animal laboratory. SUBJECTS Explanted pancreatic glands from 60 healthy farm pigs. INTERVENTION Laser output powers (OP) of 1.5, 3, 6, 10, 15, and 20 W were supplied. Ten trials for each OP were performed under US guidance on ex vivo healthy porcine pancreatic tissue. MAIN OUTCOME MEASUREMENTS Ablation volume (Va) and central carbonization volume (Vc) were measured on histologic specimens as the sum of the lesion areas multiplied by the thickness of each slide. The theoretical model of the laser-tissue interaction was based on the Pennes equation. RESULTS A circumscribed ablation zone was observed in all histologic specimens. Va values grow with the increase of the OP up to 10 W and reach a plateau between 10 and 20 W. The trend of Vc values rises constantly until 20 W. The theoretical model shows a good agreement with experimental Va and Vc for OP between 1.5 and 10 W. LIMITATIONS Ex vivo study. CONCLUSION Volumes recorded suggest that the best laser OP could be the lowest one to obtain similar Va with smaller Vc in order to avoid the risk of thermal injury to the surrounding tissue. The good agreement between the two models demonstrates the prediction capability of the theoretical model on laser-induced ablation volume in an ex vivo animal model and supports its potential use for estimating the ablation size at different laser OPs.
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Ichi I, Kono N, Arita Y, Haga S, Arisawa K, Yamano M, Nagase M, Fujiwara Y, Arai H. Identification of genes and pathways involved in the synthesis of Mead acid (20:3n-9), an indicator of essential fatty acid deficiency. Biochim Biophys Acta Mol Cell Biol Lipids 2013; 1841:204-13. [PMID: 24184513 DOI: 10.1016/j.bbalip.2013.10.013] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Revised: 10/10/2013] [Accepted: 10/24/2013] [Indexed: 12/18/2022]
Abstract
In mammals, 5,8,11-eicosatrienoic acid (Mead acid, 20:3n-9) is synthesized from oleic acid during a state of essential fatty acid deficiency (EFAD). Mead acid is thought to be produced by the same enzymes that synthesize arachidonic acid and eicosapentaenoic acid, but the genes and the pathways involved in the conversion of oleic acid to Mead acid have not been fully elucidated. The levels of polyunsaturated fatty acids in cultured cells are generally very low compared to those in mammalian tissues. In this study, we found that cultured cells, such as NIH3T3 and Hepa1-6 cells, have significant levels of Mead acid, indicating that cells in culture are in an EFAD state under normal culture conditions. We then examined the effect of siRNA-mediated knockdown of fatty acid desaturases and elongases on the level of Mead acid, and found that knockdown of Elovl5, Fads1, or Fads2 decreased the level of Mead acid. This and the measured levels of possible intermediate products for the synthesis of Mead acid such as 18:2n-9, 20:1n-9 and 20:2n-9 in the knocked down cells indicate two pathways for the synthesis of Mead acid: pathway 1) 18:1n-9→(Fads2)→18:2n-9→(Elovl5)→20:2n-9→(Fads1)→20:3n-9 and pathway 2) 18:1n-9→(Elovl5)→20:1n-9→(Fads2)→20:2n-9→(Fads1)→20:3n-9.
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Affiliation(s)
- Ikuyo Ichi
- Graduate School of Humanities and Sciences, Ochanomizu University, Tokyo 112-8610, Japan
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Damiano RJ, Badhwar V, Acker MA, Veeragandham RS, Kress DC, Robertson JO, Sundt TM. The CURE-AF trial: a prospective, multicenter trial of irrigated radiofrequency ab lation for the treatment of persistent atrial fibrillation during concomitant cardiac surgery. Heart Rhythm 2013; 11:39-45. [PMID: 24184028 DOI: 10.1016/j.hrthm.2013.10.004] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Indexed: 10/26/2022]
Abstract
BACKGROUND Ablation technology has been introduced to replace the surgical incisions of the Cox-Maze procedure in order to simplify the operation. However, the efficacy of these ablation devices has not been prospectively evaluated. OBJECTIVE The purpose of this study was to examine the efficacy and safety of irrigated unipolar and bipolar radiofrequency ablation for the treatment of persistent and long-standing persistent atrial fibrillation (AF) during concomitant cardiac surgical procedures. METHODS Between May 2007 and July 2011, 150 consecutive patients were enrolled at 15 U.S. centers. Patients were followed for 6 to 9 months, at which time a 24-hour Holter recording and echocardiogram were obtained. Recurrent AF was defined as any atrial tachyarrhythmia (ATA) lasting over 30 seconds on the Holter monitor. The safety end-point was the percent of patients who suffered a major adverse event within 30 days of surgery. All patients underwent a biatrial Cox-Maze lesion set. RESULTS Operative mortality was 4%, and there were 4 (3%) 30-day major adverse events. Overall freedom from ATAs was 66%, with 53% of patients free from ATAs and also off antiarrhythmic drugs at 6 to 9 months. Increased left atrial diameter, shorter total ablation time, and an increasing number of concomitant procedures were associated with recurrent AF (P <.05). CONCLUSION Irrigated radiofrequency ablation for treatment of AF during cardiac surgery was associated with a low complication rate. No device-related complications occurred. The Cox-Maze lesion set was effective at restoring sinus rhythm and had higher success rates in patients with smaller left atrial diameters and longer ablation times.
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Affiliation(s)
- Ralph J Damiano
- Division of Cardiothoracic Surgery, Washington University School of Medicine, St. Louis, Missouri.
| | - Vinay Badhwar
- Department of Cardiothoracic Surgery, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
| | - Michael A Acker
- Division of Cardiovascular Surgery, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania
| | | | - David C Kress
- Department of Cardiovascular and Thoracic Surgery, Aurora St. Luke's Medical Center, Milwaukee, Wisconsin
| | - Jason O Robertson
- Division of Cardiothoracic Surgery, Washington University School of Medicine, St. Louis, Missouri
| | - Thoralf M Sundt
- Division of Cardiac Surgery, Massachusetts General Hospital, Boston, Massachusetts
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Kraigher-Krainer E, Shah AM, Gupta DK, Santos A, Claggett B, Pieske B, Zile MR, Voors AA, Lefkowitz MP, Packer M, McMurray JJ, Solomon SD; PARAMOUNT Investigators. Impaired systolic function by strain imaging in heart failure with preserved ejection fraction. J Am Coll Cardiol 2014; 63:447-56. [PMID: 24184245 DOI: 10.1016/j.jacc.2013.09.052] [Citation(s) in RCA: 518] [Impact Index Per Article: 47.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Revised: 09/03/2013] [Accepted: 09/10/2013] [Indexed: 01/08/2023]
Abstract
OBJECTIVES This study sought to determine the frequency and magnitude of impaired systolic deformation in heart failure with preserved ejection fraction (HFpEF). BACKGROUND Although diastolic dysfunction is widely considered a key pathophysiologic mediator of HFpEF, the prevalence of concomitant systolic dysfunction has not been clearly defined. METHODS We assessed myocardial systolic and diastolic function in 219 HFpEF patients from a contemporary HFpEF clinical trial. Myocardial deformation was assessed using a vendor-independent 2-dimensional speckle-tracking software. The frequency and severity of impaired deformation was assessed in HFpEF, and compared to 50 normal controls free of cardiovascular disease and to 44 age- and sex-matched hypertensive patients with diastolic dysfunction (hypertensive heart disease) but no HF. Among HFpEF patients, clinical, echocardiographic, and biomarker correlates of left ventricular strain were determined. RESULTS The HFpEF patients had preserved left ventricular ejection fraction and evidence of diastolic dysfunction. Compared to both normal controls and hypertensive heart disease patients, the HFpEF patients demonstrated significantly lower longitudinal strain (LS) (-20.0 ± 2.1 and -17.07 ± 2.04 vs. -14.6 ± 3.3, respectively, p < 0.0001 for both) and circumferential strain (CS) (-27.1 ± 3.1 and -30.1 ± 3.5 vs. -22.9 ± 5.9, respectively; p < 0.0001 for both). In HFpEF, both LS and CS were related to LVEF (LS, R = -0.46; p < 0.0001; CS, R = -0.51; p < 0.0001) but not to standard echocardiographic measures of diastolic function (E' or E/E'). Lower LS was modestly associated with higher NT-proBNP, even after adjustment for 10 baseline covariates including LVEF, measures of diastolic function, and LV filling pressure (multivariable adjusted p = 0.001). CONCLUSIONS Strain imaging detects impaired systolic function despite preserved global LVEF in HFpEF that may contribute to the pathophysiology of the HFpEF syndrome. (LCZ696 Compared to Valsartan in Patients With Chronic Heart Failure and Preserved Left-ventricular Ejection Fraction; NCT00887588).
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Lin H, Dolmatova EV, Morley MP, Lunetta KL, McManus DD, Magnani JW, Margulies KB, Hakonarson H, del Monte F, Benjamin EJ, Cappola TP, Ellinor PT. Gene expression and genetic variation in human atria. Heart Rhythm 2014; 11:266-71. [PMID: 24177373 DOI: 10.1016/j.hrthm.2013.10.051] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2013] [Indexed: 11/23/2022]
Abstract
BACKGROUND The human left and right atria have different susceptibilities to develop atrial fibrillation (AF). However, the molecular events related to structural and functional changes that enhance AF susceptibility are still poorly understood. OBJECTIVE The purpose of this study was to characterize gene expression and genetic variation in human atria. METHODS We studied the gene expression profiles and genetic variations in 53 left atrial and 52 right atrial tissue samples collected from the Myocardial Applied Genomics Network (MAGNet) repository. The tissues were collected from heart failure patients undergoing transplantation and from unused organ donor hearts with normal ventricular function. Gene expression was profiled using the Affymetrix GeneChip Human Genome U133A Array. Genetic variation was profiled using the Affymetrix Genome-Wide Human SNP Array 6.0. RESULTS We found that 109 genes were differentially expressed between left and right atrial tissues. A total of 187 and 259 significant cis-associations between transcript levels and genetic variants were identified in left and right atrial tissues, respectively. We also found that a single nucleotide polymorphism at a known AF locus, rs3740293, was associated with the expression of MYOZ1 in both left and right atrial tissues. CONCLUSION We found a distinct transcriptional profile between the right and left atrium and extensive cis-associations between atrial transcripts and common genetic variants. Our results implicate MYOZ1 as the causative gene at the chromosome 10q22 locus for AF.
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Caviglioli G, Baldassari S, Cirrincione P, Russo E, Parodi B, Gatti P, Drava G. An innovative matrix controlling drug delivery produced by thermal treatment of DC tablets containing polycarbophil and ethylcellulose. Int J Pharm 2013; 458:74-82. [PMID: 24144954 DOI: 10.1016/j.ijpharm.2013.10.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Revised: 09/30/2013] [Accepted: 10/02/2013] [Indexed: 11/28/2022]
Abstract
An innovative matrix, produced by thermal treatment on direct compression (DC) tablets containing polycarbophil (POL) and ethylcellulose (EC), identified as matrix forming polymers, and able to control the release of diltiazem hydrochloride, was developed. At pH 7.2, 72 ± 1.2% (w/w) of drug loaded was released in 25 h, mostly at constant rate. This swellable and unerodible matrix controls drug release by an anomalous transport mechanism. The modifications induced by the thermal treatment are irreversible and can be used to control and characterize the matrix. A 3-component constrained mixture design allowed the investigation of the experimental domain in which the matrix forms and the computation of a mathematical model that can be used to optimize the formulation properties. The release rate can be modulated (0.032-0.064% drug released/min) through the choice of suitable treatment conditions and tablet composition. The maximum amount of diltiazem hydrochloride released by zero-order kinetics, at the lowest release rate, occurs for POL:EC ratio in the range of 1:1-2:3 with 20-30% of diluent. The tablets are able to load up to 50% (w/w) of diltiazem hydrochloride without losing their properties. A stability study performed on a selected formulation containing DTZ showed stability for at least 2.7 years at RT conditions.
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Affiliation(s)
- Gabriele Caviglioli
- Dipartimento di Farmacia, Università degli Studi di Genova, Via Brigata Salerno, 13, 16147 Genova, Italy.
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Wu P, Zhang S, Zhang L, Chen Y, Li M, Jiang H, Wu G. Functional characterization of two microsomal fatty acid desaturases from Jatropha curcas L. J Plant Physiol 2013; 170:1360-1366. [PMID: 23796520 DOI: 10.1016/j.jplph.2013.04.019] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Revised: 04/16/2013] [Accepted: 04/23/2013] [Indexed: 06/02/2023]
Abstract
Linoleic acid (LA, C18:2) and α-linolenic acid (ALA, C18:3) are polyunsaturated fatty acids (PUFAs) and major storage compounds in plant seed oils. Microsomal ω-6 and ω-3 fatty acid (FA) desaturases catalyze the synthesis of seed oil LA and ALA, respectively. Jatropha curcas L. seed oils contain large proportions of LA, but very little ALA. In this study, two microsomal desaturase genes, named JcFAD2 and JcFAD3, were isolated from J. curcas. Both deduced amino acid sequences possessed eight histidines shown to be essential for desaturases activity, and contained motif in the C-terminal for endoplasmic reticulum localization. Heterologous expression in Saccharomyces cerevisiae and Arabidopsis thaliana confirmed that the isolated JcFAD2 and JcFAD3 proteins could catalyze LA and ALA synthesis, respectively. The results indicate that JcFAD2 and JcFAD3 are functional in controlling PUFA contents of seed oils and could be exploited in the genetic engineering of J. curcas, and potentially other plants.
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Affiliation(s)
- Pingzhi Wu
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
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Sangwallek J, Kaneko Y, Tsukamoto T, Marui M, Sugiyama M, Ono H, Bamba T, Fukusaki E, Harashima S. Cloning and functional analysis of HpFAD2 and HpFAD3 genes encoding Δ12- and Δ15-fatty acid desaturases in Hansenu la polymorpha. Gene 2014; 533:110-8. [PMID: 24100086 DOI: 10.1016/j.gene.2013.09.115] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2013] [Revised: 09/25/2013] [Accepted: 09/26/2013] [Indexed: 12/19/2022]
Abstract
Two fatty acid desaturase genes have been cloned: HpFAD2 and HpFAD3 encode Hansenula polymorpha Δ12-fatty acid desaturase (HpFad2) and Δ15-fatty acid desaturase (HpFad3), which are responsible for the production of linoleic acid (LA, C18:2, Δ9, Δ12) and α-linolenic acid (ALA, αC18:3, Δ9, Δ12, Δ15), respectively. The open reading frame of the HpFAD2 and HpFAD3 genes is 1215bp and 1239bp, encoding 405 and 413 amino acids, respectively. The putative amino acid sequences of HpFad2 and HpFad3 share more than 60% similarity and three conserved histidine-box motifs with other known yeast Fad homologs. Hpfad2Δ disruptant cannot produce C18:2 and αC18:3, while the deletion of HpFAD3 only causes the absence of αC18:3. Heterologous expression of either the HpFAD2 or the HpFAD3 gene in Saccharomyces cerevisiae resulted in the presence of C18:2 and αC18:3 when the C18:2 precursor was added. Taken together, these observations indicate that HpFAD2 and HpFAD3 indeed encode Δ12- and Δ15-fatty acid desaturases that function as the only ones responsible for desaturation of oleic acid (C18:1) and linoleic acid (C18:2), respectively, in H. polymorpha. Because a Fatty Acid Regulated (FAR) region and a Low Oxygen Response Element (LORE), which are responsible for regulation of a Δ9-fatty acid desaturase gene (ScOLE1) in S. cerevisiae, are present in the upstream regions of both genes, we investigated whether the transcriptional levels of HpFAD2 and HpFAD3 are affected by supplementation with nutrient unsaturated fatty acids or by low oxygen conditions. Whereas both genes were up-regulated under low oxygen conditions, only HpFAD3 transcription was repressed by an excess of C18:1, C18:2 and C18:3, while the HpFAD2 transcript level did not significantly change. These observations indicate that HpFAD2 expression is not controlled at the transcriptional level by fatty acids even though it contains a FAR-like region. This study indicates that HpFAD2 may be regulated by post-transcriptional mechanisms, whereas HpFAD3 may be mainly controlled at a transcriptional level.
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50
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Khurram IM, Beinart R, Zipunnikov V, Dewire J, Yarmohammadi H, Sasaki T, Spragg DD, Marine JE, Berger RD, Halperin HR, Calkins H, Zimmerman SL, Nazarian S. Magnetic resonance image intensity ratio, a normalized measure to enable interpatient comparability of left atrial fibrosis. Heart Rhythm 2013; 11:85-92. [PMID: 24096166 DOI: 10.1016/j.hrthm.2013.10.007] [Citation(s) in RCA: 128] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2013] [Indexed: 10/26/2022]
Abstract
BACKGROUND The measurement of late gadolinium-enhanced magnetic resonance imaging (LGE-MRI) intensity in arbitrary units limits the objectivity of thresholds for focal scar detection and interpatient comparisons of scar burden. OBJECTIVE To develop and validate a normalized measure, the image intensity ratio (IIR), for the assessment of left atrial (LA) scar on LGE-MRI. METHODS Electrocardiogram- and respiratory-gated 1.5 Tesla LGE-MRI was performed in 75 patients (75% men; 62 ± 8 years) before atrial fibrillation ablation. The local IIR was defined as LA myocardial signal intensity for each of the 20 sectors on contiguous axial image planes divided by the mean LA blood pool image intensity. Intracardiac point-by-point sampled electroanatomic map points were coregistered with the corresponding image sectors. RESULTS The average bipolar voltage for all 8153 electroanatomic map points was 0.9 ± 1.1 mV. In a mixed effects model accounting for within patient clustering, and adjusting for age, LA volume, mass, body mass index, sex, CHA2DS2-VASc score, atrial fibrillation type, history of previous ablations, and contrast delay time, each unit increase in local IIR was associated with 91.3% decrease in bipolar LA voltage (P < .001). Local IIR thresholds of >0.97 and >1.61 corresponded to bipolar voltage <0.5 and <0.1 mV, respectively. CONCLUSIONS Normalization of LGE-MRI intensity by the mean blood pool intensity results in a metric that is closely associated with intracardiac voltage as a surrogate of atrial fibrosis.
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Affiliation(s)
- Irfan M Khurram
- Department of Medicine/Cardiology, Johns Hopkins University, Baltimore, Maryland
| | - Roy Beinart
- Department of Medicine/Cardiology, Johns Hopkins University, Baltimore, Maryland
| | - Vadim Zipunnikov
- Department of Biostatistics, Johns Hopkins University, Baltimore, Maryland
| | - Jane Dewire
- Department of Medicine/Cardiology, Johns Hopkins University, Baltimore, Maryland
| | - Hirad Yarmohammadi
- Department of Medicine/Cardiology, Johns Hopkins University, Baltimore, Maryland
| | - Takeshi Sasaki
- Department of Medicine/Cardiology, Johns Hopkins University, Baltimore, Maryland
| | - David D Spragg
- Department of Medicine/Cardiology, Johns Hopkins University, Baltimore, Maryland
| | - Joseph E Marine
- Department of Medicine/Cardiology, Johns Hopkins University, Baltimore, Maryland
| | - Ronald D Berger
- Department of Medicine/Cardiology, Johns Hopkins University, Baltimore, Maryland
| | - Henry R Halperin
- Department of Medicine/Cardiology, Johns Hopkins University, Baltimore, Maryland; Department of Radiology, Johns Hopkins University, Baltimore, Maryland
| | - Hugh Calkins
- Department of Medicine/Cardiology, Johns Hopkins University, Baltimore, Maryland
| | | | - Saman Nazarian
- Department of Medicine/Cardiology, Johns Hopkins University, Baltimore, Maryland.
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