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Wu S, Liu X, Dong A, Gragnoli C, Griffin C, Wu J, Yau ST, Wu R. The metabolomic physics of complex diseases. Proc Natl Acad Sci U S A 2023; 120:e2308496120. [PMID: 37812720 PMCID: PMC10589719 DOI: 10.1073/pnas.2308496120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Accepted: 08/15/2023] [Indexed: 10/11/2023] Open
Abstract
Human diseases involve metabolic alterations. Metabolomic profiles have served as a vital biomarker for the early identification of high-risk individuals and disease prevention. However, current approaches can only characterize individual key metabolites, without taking into account the reality that complex diseases are multifactorial, dynamic, heterogeneous, and interdependent. Here, we leverage a statistical physics model to combine all metabolites into bidirectional, signed, and weighted interaction networks and trace how the flow of information from one metabolite to the next causes changes in health state. Viewing a disease outcome as the consequence of complex interactions among its interconnected components (metabolites), we integrate concepts from ecosystem theory and evolutionary game theory to model how the health state-dependent alteration of a metabolite is shaped by its intrinsic properties and through extrinsic influences from its conspecifics. We code intrinsic contributions as nodes and extrinsic contributions as edges into quantitative networks and implement GLMY homology theory to analyze and interpret the topological change of health state from symbiosis to dysbiosis and vice versa. The application of this model to real data allows us to identify several hub metabolites and their interaction webs, which play a part in the formation of inflammatory bowel diseases. The findings by our model could provide important information on drug design to treat these diseases and beyond.
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Affiliation(s)
- Shuang Wu
- Center for Computational Biology, College of Biological Sciences and Technology, Beijing Forestry University, Beijing100083, China
| | - Xiang Liu
- Chern Institute of Mathematics, Nankai University, Tianjin300071, China
- Beijing Yanqi Lake Institute of Mathematical Sciences and Applications, Beijing101408, China
| | - Ang Dong
- Center for Computational Biology, College of Biological Sciences and Technology, Beijing Forestry University, Beijing100083, China
| | - Claudia Gragnoli
- Department of Public Health Sciences, Penn State College of Medicine, Hershey, PA17033
- Department of Medicine, Creighton University School of Medicine, Omaha, NE68124
- Molecular Biology Laboratory, Bios Biotech Multi-Diagnostic Health Center, Rome00197, Italy
| | - Christopher Griffin
- Applied Research Laboratory, The Pennsylvania State University, University Park, PA16802
| | - Jie Wu
- Beijing Yanqi Lake Institute of Mathematical Sciences and Applications, Beijing101408, China
| | - Shing-Tung Yau
- Beijing Yanqi Lake Institute of Mathematical Sciences and Applications, Beijing101408, China
- Yau Mathematical Sciences Center, Tsinghua University, Beijing100084, China
| | - Rongling Wu
- Beijing Yanqi Lake Institute of Mathematical Sciences and Applications, Beijing101408, China
- Yau Mathematical Sciences Center, Tsinghua University, Beijing100084, China
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Dutta A, Panchali T, Khatun A, Jarapala SR, Das K, Ghosh K, Chakrabarti S, Pradhan S. Anti-cancer potentiality of linoelaidic acid isolated from marine Tapra fish oil (Ophisthopterus tardoore) via ROS generation and caspase activation on MCF-7 cell line. Sci Rep 2023; 13:14125. [PMID: 37644076 PMCID: PMC10465529 DOI: 10.1038/s41598-023-34885-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Accepted: 05/09/2023] [Indexed: 08/31/2023] Open
Abstract
The implication of inflammation in the pathophysiology of several types of cancers has been under intense investigation. Conjugated fatty acids can modulate inflammation and present anticancer effects, promoting cancer cell death. In this paper, we evaluated the efficacy of new conjugated fatty acids isolated from marine Opisthopterus tardoore (Tapra fish) in human breast cancer cell lines MCF-7. Linoelaidic acid, a marine fish (O. tardoore) derived unsaturated fatty acids, showed effective anticancer activity against MCF-7. Cell viability (MTT) assay revealed a dose-dependent decline in cancer cell viability. It was noteworthy that 5 µM linoelaidic acid decreased the MCF-7 cell viability by 81.82%. Besides that, linoelaidic acid significantly (P< 0.05) increased the level of tumor necrosis factor-α (TNF-α) and interleukin-1 receptor antagonist (IL-1ra) studied by ELISA. Not only that, linoelaidic acid significantly decreased the reduced glutathione level and increased the oxidized glutathione level in MCF-7 cells indicating the oxidative stress inside the cell. Two different cell staining methods with acridine orange-ethidium bromide and DAPI confirmed that the linoelaidic acid rendered their detrimental effect on cancer cells. To decipher the mode of apoptosis Western blotting was performed in which the expression pattern of several proteins (p53, IL-10, and IL-1ra) established the apoptosis in the studied cell lines after linoelaidic acid exposure. Hence it may be conferred that linoelaidic acid has prompt anticancer activity. Therefore this drug can be used further for the treatment of cancer.
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Affiliation(s)
- Ananya Dutta
- Department of Paramedical and Allied Health Sciences, Midnapore City College, Midnapore, 721129, West Bengal, India
| | - Titli Panchali
- Department of Paramedical and Allied Health Sciences, Midnapore City College, Midnapore, 721129, West Bengal, India
| | - Amina Khatun
- Department of Paramedical and Allied Health Sciences, Midnapore City College, Midnapore, 721129, West Bengal, India
| | - Sreenivasa Rao Jarapala
- Department of Food Chemistry and Nutrient Analysis, National Institute of Nutrition (NIN), Hyderabad, Telengana, 500007, India
| | - Koushik Das
- Department of Nutrition, Belda College, Paschim Medinipur, 721424, West Bengal, India
| | - Kuntal Ghosh
- Department of Paramedical and Allied Health Sciences, Midnapore City College, Midnapore, 721129, West Bengal, India
| | - Sudipta Chakrabarti
- Department of Paramedical and Allied Health Sciences, Midnapore City College, Midnapore, 721129, West Bengal, India
| | - Shrabani Pradhan
- Department of Paramedical and Allied Health Sciences, Midnapore City College, Midnapore, 721129, West Bengal, India.
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Da Silva ED, Sandri EC, Fernandes LA, Carraro PC, De Oliveira DE. Conjugated linoleic acid trans-10, cis-12 increases the expression of genes from cell cycle progression and cis-9, trans-11 stimulates apoptotic genes in different mammary tumor explants of female dogs. Mol Biol Rep 2023; 50:4011-4015. [PMID: 36849857 DOI: 10.1007/s11033-023-08287-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 01/17/2023] [Indexed: 03/01/2023]
Abstract
BACKGROUND The conjugated linoleic acid (CLA) isomer cis-9, trans-11 is an anticarcinogen that inhibits cell proliferation and/or induces apoptosis of tumor cells. The objective of this study was to evaluate the expression of genes responsible for cell cycle regulation and apoptosis in tumor explants of mammary anaplastic carcinoma (AC) and mammary tubulopapillary carcinoma (TC) cultured in vitro with the CLA isomers cis-9, trans-11 and trans-10, cis-12. METHODS In this study we used mammary explants from two adult female dogs that revealed two types of malignant tumors: (a) anaplastic mammary carcinoma (AC) and (b) mammary tubulopapillary carcinoma (TC). The explants (n = 6 per treatment) had an average weight of 80.0 ± 2.0 mg and were cultured for 24 h in 35 mm culture plates under the following treatments: (a) Control: Culture medium + fatty acid free bovine serum albumin (BSA); (b) Culture medium + cis-9, trans-11 CLA (75 µM) diluted with fatty acid free bovine serum albumin (BSA), and; (c) Culture medium + trans-10, cis-12 CLA (75 µM) diluted with fatty acid free bovine serum albumin (BSA). After that, total RNA was extracted, complementary DNA was synthesized (cDNA), and quantitative analysis by real-time polymerase chain reaction (RT-qPCR) was conducted. Data were analyzed using the MIXED procedure of SAS. RESULTS Compared with the Control, the CLA trans-10, cis-12 treatment decreased expression of the gene encoding the p53 by 20% (P = 0.02), Caspase-3 by 25% (P = 0.06) and Bax by 51% (P = 0.001) in AC. The CLA cis-9, trans-11 increased the gene expression of proapoptotic protein Bax in TC by 68% (P = 0.01), but increased the expression of the antiapoptotic Bcl2 gene in AC by 72% (P = 0.006). CONCLUSION The CLA cis-9, trans-11 stimulates apoptotic genes in mammary tubulopapillary carcinoma, but has a contrary effect on the anaplastic carcinoma, and the CLA trans-10, cis-12 stimulates cell cycle progression genes and may have an antiapoptotic effect, mainly in mammary anaplastic carcinoma.
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Affiliation(s)
- E D Da Silva
- Department of Animal Production, Santa Catarina State University, 88520-000, Lages, Santa Catarina, Brazil
| | - E C Sandri
- Department of Animal Production, Santa Catarina State University, 88520-000, Lages, Santa Catarina, Brazil
| | - L A Fernandes
- Department of Animal Production, Santa Catarina State University, 88520-000, Lages, Santa Catarina, Brazil
| | - P C Carraro
- Department of Animal Production, Santa Catarina State University, 88520-000, Lages, Santa Catarina, Brazil
| | - D E De Oliveira
- Department of Animal Production, Santa Catarina State University, 88520-000, Lages, Santa Catarina, Brazil.
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Panda M, Kalita E, Rao A, Prajapati VK. Mechanism of cell cycle regulation and cell proliferation during human viral infection. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2023; 135:497-525. [PMID: 37061340 DOI: 10.1016/bs.apcsb.2022.11.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Over the history of the coevolution of Host viral interaction, viruses have customized the host cellular machinery into their use for viral genome replication, causing effective infection and ultimately aiming for survival. They do so by inducing subversions to the host cellular pathways like cell cycle via dysregulation of important cell cycle checkpoints by viral encoded proteins, arresting the cell cycle machinery, blocking cytokinesis as well as targeting subnuclear bodies, thus ultimately disorienting the cell proliferation. Both DNA and RNA viruses have been active participants in such manipulation resulting in serious outcomes of cancer. They achieve this by employing different mechanisms-Protein-protein interaction, protein-phosphorylation, degradation, redistribution, viral homolog, and viral regulation of APC at different stages of cell cycle events. Several DNA viruses cause the quiescent staged cells to undergo cell cycle which increases nucleotide pools logistically significantly persuading viral replication whereas few other viruses arrest a particular stage of cell cycle. This allows the latter group to sustain the infection which allows them to escape host immune response and support viral multiplication. Mechanical study of signaling such viral mediated pathways could give insight into understanding the etiology of tumorigenesis and progression. Overall this chapter highlights the possible strategies employed by DNA/RNA viral families which impact the normal cell cycle but facilitate viral infected cell replication. Such information could contribute to comprehending viral infection-associated disorders to further depth.
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Affiliation(s)
- Mamta Panda
- Department of Biochemistry, School of Life Sciences, Central University of Rajasthan, Bandarsindri, Kishangarh, Ajmer, Rajasthan, India
| | - Elora Kalita
- Department of Biochemistry, School of Life Sciences, Central University of Rajasthan, Bandarsindri, Kishangarh, Ajmer, Rajasthan, India
| | - Abhishek Rao
- Department of Biochemistry, School of Life Sciences, Central University of Rajasthan, Bandarsindri, Kishangarh, Ajmer, Rajasthan, India
| | - Vijay Kumar Prajapati
- Department of Biochemistry, School of Life Sciences, Central University of Rajasthan, Bandarsindri, Kishangarh, Ajmer, Rajasthan, India; Department of Biochemistry, School of Biological Sciences, Central University of Punjab, Bathinda, Punjab, India.
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Roy AC, Prasad A, Ghosh I. Phytochemical Profiling of Tupistra nutans Wall. ex Lindl. Inflorescence Extract and Evaluation of Its Antioxidant Activity and Toxicity in Hepatocarcinoma (HepG2) and Fibroblast (F111) Cells. Appl Biochem Biotechnol 2023; 195:172-195. [PMID: 36070165 DOI: 10.1007/s12010-022-04145-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/28/2022] [Indexed: 01/13/2023]
Abstract
Tupistra nutans Wall. ex Lindl. is a medicinal plant found in the Eastern Himalayan region. Besides being used as a folk medicine for pain and high blood sugar, its inflorescence is consumed as a vegetable. However, its medicinal properties have not been proven in vitro and in vivo till now. Therefore, in this study, we reported the phytochemicals present in the methanolic extract of Tupistra nutans Wall. ex Lindl. inflorescence (METNI) and its comparative effect in liver carcinoma HepG2 cells against non-cancerous murine fibroblast F111 cells. Phytochemical profiling by gas chromatography-mass spectrometry (GC-MS) analysis showed that METNI was rich in unsaturated fatty acids, vitamin E, and anticancer compounds like diosgenin, linoleic acid, and palmitoleic acid. METNI was found to have in vitro antioxidant property as determined by DPPH and pyrogallol methods, and UV protection property as investigated by fluorescence-based and spectrophotometric methods. MTT assay revealed METNI caused significantly more cell proliferation inhibition in HepG2 (IC50 = 138 µg/ml) compared to F111 (IC50 = 347 µg/ml) cells. Although in both HepG2 and F111 cells METNI showed significant antioxidant activity, it led to intracellular ROS generation and cell cycle alteration at higher exposure. The obtained results suggest that Tupistra nutans can be a promising application for anticancer drug and skin care product development, but can be harmful if overconsumed.
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Affiliation(s)
- Ashim Chandra Roy
- Biochemistry and Environmental Toxicology Laboratory, Lab. # 103, School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Abhinav Prasad
- Biochemistry and Environmental Toxicology Laboratory, Lab. # 103, School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Ilora Ghosh
- Biochemistry and Environmental Toxicology Laboratory, Lab. # 103, School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, 110067, India.
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Conjugated Linoleic Acid Treatment Attenuates Cancerous features in Hepatocellular Carcinoma Cells. Stem Cells Int 2022; 2022:1850305. [PMID: 36132168 PMCID: PMC9484933 DOI: 10.1155/2022/1850305] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 07/15/2022] [Accepted: 08/01/2022] [Indexed: 12/24/2022] Open
Abstract
Background. A growing number of hepatocellular carcinoma (HCC), and recurrence frequency recently have drawn researchers’ attention to alternative approaches. The concept of differentiation therapies (DT) relies on inducing differentiation in HCC cells in order to inhibit recurrence and metastasis. Hepatocyte nuclear factor 4 alpha (HNF4α) is the key hepatogenesis transcription factor and its upregulation may decrease the invasiveness of cancerous cells by suppressing epithelial-mesenchymal transition (EMT). This study aimed to evaluate the effect of conjugated linoleic acid (CLA) treatment, natural ligand of HNF4α, on the proliferation, migration, and invasion capacities of HCC cells in vitro. Materials and Method. Sk-Hep-1 and Hep-3B cells were treated with different doses of CLA or BIM5078 [1-(2
-chloro-5
-nitrobenzenesulfonyl)−2-methylbenzimidazole], an HNF4α antagonist. The expression levels of HNF4a and EMT related genes were evaluated and associated to hepatocytic functionalities, migration, and colony formation capacities, as well as to viability and proliferation rate of HCC cells. Results. In both HCC lines, CLA treatment induced HNF4α expression in parallel to significantly decreased EMT marker levels, migration, colony formation capacity, and proliferation rate, whereas BIM5078 treatment resulted in the opposite effects. Moreover, CLA supplementation also upregulated ALB, ZO1, and HNF4α proteins as well as glycogen storage capacity in the treated HCC cells. Conclusion. CLA treatment can induce a remarkable hepatocytic differentiation in HCC cells and attenuates cancerous features. This could be as a result of HNF4a induction and EMT inhibition.
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Wu H, Ganguly S, Tollefsbol TO. Modulating Microbiota as a New Strategy for Breast Cancer Prevention and Treatment. Microorganisms 2022; 10:microorganisms10091727. [PMID: 36144329 PMCID: PMC9503838 DOI: 10.3390/microorganisms10091727] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 08/23/2022] [Accepted: 08/25/2022] [Indexed: 11/18/2022] Open
Abstract
Breast cancer (BC) is the most common cancer in women in the United States. There has been an increasing incidence and decreasing mortality rate of BC cases over the past several decades. Many risk factors are associated with BC, such as diet, aging, personal and family history, obesity, and some environmental factors. Recent studies have shown that healthy individuals and BC patients have different microbiota composition, indicating that microbiome is a new risk factor for BC. Gut and breast microbiota alterations are associated with BC prognosis. This review will evaluate altered microbiota populations in gut, breast tissue, and milk of BC patients, as well as mechanisms of interactions between microbiota modulation and BC. Probiotics and prebiotics are commercially available dietary supplements to alleviate side-effects of cancer therapies. They also shape the population of human gut microbiome. This review evaluates novel means of modulating microbiota by nutritional treatment with probiotics and prebiotics as emerging and promising strategies for prevention and treatment of BC. The mechanistic role of probiotic and prebiotics partially depend on alterations in estrogen metabolism, systematic immune regulation, and epigenetics regulation.
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Affiliation(s)
- Huixin Wu
- Department of Biology, University of Alabama at Birmingham, 1300 University Boulevard, Birmingham, AL 35294, USA
| | - Sebanti Ganguly
- Department of Biology, University of Alabama at Birmingham, 1300 University Boulevard, Birmingham, AL 35294, USA
| | - Trygve O. Tollefsbol
- Department of Biology, University of Alabama at Birmingham, 1300 University Boulevard, Birmingham, AL 35294, USA
- Integrative Center for Aging Research, University of Alabama Birmingham, 1530 3rd Avenue South, Birmingham, AL 35294, USA
- O’Neal Comprehensive Cancer Center, University of Alabama Birmingham, 1802 6th Avenue South, Birmingham, AL 35294, USA
- Nutrition Obesity Research Center, University of Alabama Birmingham, 1675 University Boulevard, Birmingham, AL 35294, USA
- Comprehensive Diabetes Center, University of Alabama Birmingham, 1825 University Boulevard, Birmingham, AL 35294, USA
- University Wide Microbiome Center, University of Alabama Birmingham, 845 19th Street South, Birmingham, AL 35294, USA
- Correspondence: ; Tel.: +1-205-934-4573; Fax: +1-205-975-6097
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Tegopoulos K, Stergiou OS, Kiousi DE, Tsifintaris M, Koletsou E, Papageorgiou AC, Argyri AA, Chorianopoulos N, Galanis A, Kolovos P. Genomic and Phylogenetic Analysis of Lactiplantibacillus plantarum L125, and Evaluation of Its Anti-Proliferative and Cytotoxic Activity in Cancer Cells. Biomedicines 2021; 9:biomedicines9111718. [PMID: 34829947 PMCID: PMC8615743 DOI: 10.3390/biomedicines9111718] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 11/08/2021] [Accepted: 11/16/2021] [Indexed: 01/24/2023] Open
Abstract
Lactiplantibacillus plantarum is a diverse species that includes nomadic strains isolated from a variety of environmental niches. Several L. plantarum strains are being incorporated in fermented foodstuffs as starter cultures, while some of them have also been characterized as probiotics. In this study, we present the draft genome sequence of L. plantarum L125, a potential probiotic strain presenting biotechnological interest, originally isolated from a traditional fermented meat product. Phylogenetic and comparative genomic analysis with other potential probiotic L. plantarum strains were performed to determine its evolutionary relationships. Furthermore, we located genes involved in the probiotic phenotype by whole genome annotation. Indeed, genes coding for proteins mediating host–microbe interactions and bile salt, heat and cold stress tolerance were identified. Concerning the potential health-promoting attributes of the novel strain, we determined that L. plantarum L125 carries an incomplete plantaricin gene cluster, in agreement with previous in vitro findings, where no bacteriocin-like activity was detected. Moreover, we showed that cell-free culture supernatant (CFCS) of L. plantarum L125 exerts anti-proliferative, anti-clonogenic and anti-migration activity against the human colon adenocarcinoma cell line, HT-29. Conclusively, L. plantarum L125 presents desirable probiotic traits. Future studies will elucidate further its biological and health-related properties.
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Affiliation(s)
- Konstantinos Tegopoulos
- Department of Molecular Biology and Genetics, Faculty of Health Sciences, Democritus University of Thrace, 68100 Alexandroupolis, Greece; (K.T.); (O.S.S.); (D.E.K.); (M.T.); (E.K.); (A.C.P.)
| | - Odysseas Sotirios Stergiou
- Department of Molecular Biology and Genetics, Faculty of Health Sciences, Democritus University of Thrace, 68100 Alexandroupolis, Greece; (K.T.); (O.S.S.); (D.E.K.); (M.T.); (E.K.); (A.C.P.)
| | - Despoina Eugenia Kiousi
- Department of Molecular Biology and Genetics, Faculty of Health Sciences, Democritus University of Thrace, 68100 Alexandroupolis, Greece; (K.T.); (O.S.S.); (D.E.K.); (M.T.); (E.K.); (A.C.P.)
| | - Margaritis Tsifintaris
- Department of Molecular Biology and Genetics, Faculty of Health Sciences, Democritus University of Thrace, 68100 Alexandroupolis, Greece; (K.T.); (O.S.S.); (D.E.K.); (M.T.); (E.K.); (A.C.P.)
| | - Ellie Koletsou
- Department of Molecular Biology and Genetics, Faculty of Health Sciences, Democritus University of Thrace, 68100 Alexandroupolis, Greece; (K.T.); (O.S.S.); (D.E.K.); (M.T.); (E.K.); (A.C.P.)
| | - Aristotelis C. Papageorgiou
- Department of Molecular Biology and Genetics, Faculty of Health Sciences, Democritus University of Thrace, 68100 Alexandroupolis, Greece; (K.T.); (O.S.S.); (D.E.K.); (M.T.); (E.K.); (A.C.P.)
| | - Anthoula A. Argyri
- Institute of Technology of Agricultural Products, Hellenic Agricultural Organization DIMITRA, Sofokli Venizelou 1, Lycovrissi, 14123 Attiki, Greece; (A.A.A.); (N.C.)
| | - Nikos Chorianopoulos
- Institute of Technology of Agricultural Products, Hellenic Agricultural Organization DIMITRA, Sofokli Venizelou 1, Lycovrissi, 14123 Attiki, Greece; (A.A.A.); (N.C.)
| | - Alex Galanis
- Department of Molecular Biology and Genetics, Faculty of Health Sciences, Democritus University of Thrace, 68100 Alexandroupolis, Greece; (K.T.); (O.S.S.); (D.E.K.); (M.T.); (E.K.); (A.C.P.)
- Correspondence: (A.G.); (P.K.)
| | - Petros Kolovos
- Department of Molecular Biology and Genetics, Faculty of Health Sciences, Democritus University of Thrace, 68100 Alexandroupolis, Greece; (K.T.); (O.S.S.); (D.E.K.); (M.T.); (E.K.); (A.C.P.)
- Correspondence: (A.G.); (P.K.)
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Liu Y, Bian Y, Luo X, Wang C, Mu D, Pan G, Wu J, Shi H. Synergistic effect of docosahexaenoic acid or conjugated linoleic acid with caffeic acid on ameliorating oxidative stress of HepG2 cells. J Food Sci 2021; 86:3240-3251. [PMID: 34118075 DOI: 10.1111/1750-3841.15775] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 03/16/2021] [Accepted: 04/19/2021] [Indexed: 12/13/2022]
Abstract
Exploring the synergistic effect of docosahexaenoic acid (DHA) or conjugated linoleic acid (CLA) with caffeic acid (CA) on ameliorating oxidative stress, thereby introducing CA to DHA or CLA will contribute significantly to enhance the bioactivity. We observed that DHA or CLA with CA promoted the recovery of intact individual morphology and the decline of cavities inside the nucleus and apoptosis under the observation of confocal laser scanning microscopy and fluorescent inverted microscope. The activity of intracellular antioxidant enzymes catalase (CAT) and glutathione peroxidase (GSH-Px), lactate dehydrogenase (LDH) leakage, pyruvate and malondialdehyde and reactive oxygen species (ROS), cellular morphology, and cell cycle were analyzed. Our results showed that DHA or CLA with CA enhanced the activity of CAT and GSH-Px, decreased LDH leakage and the number of apoptotic, significantly inhibited (ROS-induced cellular injury. Cell arrest in G1 and G2 phase during cell mitosis was reduced by the measurement of flow cytometry. DHA or CLA combined with CA could markedly strengthen the free radical scavenging and endogenous antioxidant defense capacity on HepG2 cells. This study provides a new direction in the application of synergies to antioxidant compounds. PRACTICAL APPLICATION: Caffeic acid (CA) can synergize with docosahexaenoic acid (DHA) or conjugated linoleic acid (CLA) to enhance antioxidant capacity. This study highlighted an effect of ameliorating oxidative stress injury DHA or CLA with CA on HepG2 cells. The data indicated that DHA or CLA with CA might be used to relieve oxidative stress damage.
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Affiliation(s)
- Yumeng Liu
- College of Food Science, Shenyang Agricultural University, Shenyang, P.R. China
| | - Yuanyuan Bian
- College of Food Science, Shenyang Agricultural University, Shenyang, P.R. China
| | - Xue Luo
- College of Food Science, Shenyang Agricultural University, Shenyang, P.R. China
| | - Cong Wang
- College of Food Science, Shenyang Agricultural University, Shenyang, P.R. China
| | - Delun Mu
- College of Food Science, Shenyang Agricultural University, Shenyang, P.R. China
| | - Guoyang Pan
- College of Food Science, Shenyang Agricultural University, Shenyang, P.R. China
| | - Junrui Wu
- College of Food Science, Shenyang Agricultural University, Shenyang, P.R. China
| | - Haisu Shi
- College of Food Science, Shenyang Agricultural University, Shenyang, P.R. China
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Abstract
Conjugated linoleic acids (CLA) are distinctive polyunsaturated fatty acids. They are present in food produced by ruminant animals and they are accumulated in seeds of certain plants. These naturally occurring substances have demonstrated to have anti-carcinogenic activity. Their potential effect to inhibit cancer has been shown in vivo and in vitro studies. In this review, we present the multiple effects of CLA isomers on cancer development such as anti-tumor efficiency, anti-mutagenic and anti-oxidant activity. Although the majority of the studies in vivo and in vitro summarized in this review have demonstrated beneficial effects of CLA on the proliferation and apoptosis of tumor cells, further experimental work is needed to estimate the true value of CLA as a real anti-cancer agent.
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NEO412: A temozolomide analog with transdermal activity in melanoma in vitro and in vivo. Oncotarget 2018; 9:37026-37041. [PMID: 30651933 PMCID: PMC6319336 DOI: 10.18632/oncotarget.26443] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2018] [Accepted: 11/26/2018] [Indexed: 12/17/2022] Open
Abstract
Despite new treatments introduced over the past several years, metastatic melanoma remains difficult to cure. Although melanoma in situ (MIS) has better prognosis, it relies heavily on thorough surgical excision, where ill-defined margins can pose a challenge to successful removal, potentially leading to invasive melanoma. As well, MIS in the head and neck area can create serious aesthetic concerns with regard to the surgical defect and substantial scar formation. Toward improved treatment of localized melanoma, including the targeting of unrecognized invasive components, we have been studying a novel agent, NEO412, designed for transdermal application. NEO412 is a tripartite agent that was created by covalent conjugation of three bioactive agents: temozolomide (TMZ, an alkylating agent), perillyl alcohol (POH, a naturally occurring monoterpene with anticancer properties), and linoleic acid (LA, an omega-6 essential fatty acid). We investigated the anti-melanoma potency of NEO412 in vitro and in mouse models in vivo. The in vitro results showed that NEO412 effectively killed melanoma cells, including TMZ-resistant and BRAF mutant ones, through DNA alkylation and subsequent apoptosis. in vivo, NEO412 inhibited tumor growth when applied topically to the skin of tumor-bearing animals, and this effect involved a combination of increased tumor cell death with decreased blood vessel development. At the same time, drug-treated mice continued to thrive, and there was no apparent damage to normal skin in response to daily drug applications. Combined, our results present NEO412 as a potentially promising new treatment for cutaneous melanoma, in particular MIS, deserving of further study.
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Sun J, Jing S, Jiang R, Wang C, Zhang C, Chen J, Li H. Metabolomics study of the therapeutic mechanism of Schisandra chinensis lignans on aging rats induced by d-galactose. Clin Interv Aging 2018; 13:829-841. [PMID: 29750025 PMCID: PMC5935080 DOI: 10.2147/cia.s163275] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Objective The aim of this study was to evaluate the antiaging effect of Schisandra chinensis lignans (SCL) by analyzing the characteristics in the serum of d-galactose (d-gal)-induced rats. Methods Forty male Wistar rats were randomly divided into control group, d-gal model group, low-dose SCL group (50 mg/kg/d), medium-dose SCL group (100 mg/kg/d), and high-dose SCL group (200 mg/kg/d). A serum metabolomics analysis method based on rapid resolution liquid chromatography coupled with quadruple-time-of-flight mass spectrometry was carried out to study the characteristics of d-gal-induced aging rats and evaluate the antiaging effects of SCL, and multivariate statistical analysis was performed for pattern recognition and characteristic metabolites identification. The relative levels of p19, p53, and p21 genes in the brain tissue were measured by quantitative real-time polymerase chain reaction for investigating the underlying mechanism. Results Metabolomics analysis showed that 15 biomarkers were identified and 13 of them recovered to the normal levels after the administration of SCL. Based on the pathway analysis, the antiaging mechanisms of SCL might be involved in the following metabolic pathways: energy, amino acid, lipid, and phospholipid metabolism. Furthermore, SCL significantly inhibited the mRNA expression level of p19, p53, and p21 in the brain of aging rats induced by d-gal. Conclusion These results suggest that SCL can delay rat aging induced by d-gal through multiple pathways.
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Affiliation(s)
- Jinghui Sun
- Department of Pharmacology, College of Pharmacy, Beihua University, Jilin, People's Republic of China
| | - Shu Jing
- General Surgery Area, Affiliated Hospital of Beihua University, Jilin, People's Republic of China
| | - Rui Jiang
- Jilin Technology Innovation Center for Chinese Medicine Biotechnology, College of Chemistry and Biology, Beihua University, Jilin, People's Republic of China
| | - Chunmei Wang
- Department of Pharmacology, College of Pharmacy, Beihua University, Jilin, People's Republic of China
| | - Chengyi Zhang
- Department of Pharmacology, College of Pharmacy, Beihua University, Jilin, People's Republic of China
| | - Jianguang Chen
- Department of Pharmacology, College of Pharmacy, Beihua University, Jilin, People's Republic of China
| | - He Li
- Department of Pharmacology, College of Pharmacy, Beihua University, Jilin, People's Republic of China
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Rodríguez-Alcalá LM, Ares I, Fontecha J, Martínez-Larrañaga MR, Anadón A, Martínez MA. Absorption Kinetics of the Main Conjugated Linoleic Acid Isomers in Commercial-Rich Oil after Oral Administration in Rats. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:7680-7686. [PMID: 28789519 DOI: 10.1021/acs.jafc.7b02143] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
This study aimed to assess the oral absorption and plasma kinetics of two main isomers contained in commercial conjugated linoleic acid (CLA)-rich oil (Tonalin TG-80), rumenic acid (RA), and C18:2 trans-10, cis-12. The isomer plasma disposition after the single oral dose of 3000 mg of Tonalin TG-80/kg, containing 1200 mg/kg of each isomer, was studied in rats. The isomer plasma concentrations were determined by gas chromatography with flame ionization detection. The plasma kinetics showed rapid oral absorption of RA and C18:2 trans-10, cis-12 (t1/2a 0.34 ± 0.09 and 0.53 ± 0.01 h) and slow elimination (t1/2β 25.68 ± 3.29 and 18.12 ± 1.71 h); the maximal isomer plasma concentrations (Cmax) of 8.48 ± 0.98 and 7.67 ± 0.80 μg mL-1, respectively, were estimated at 2.08 ± 0.14 and 2.26 ± 0.11 h. Our results from a preclinical kinetic study in rats help to design future studies in humans for evaluating the CLA isomer dose-response.
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Affiliation(s)
- Luís M Rodríguez-Alcalá
- Instituto de Investigación en Ciencias de la Alimentación (CIAL, CSIC-UAM), Campus de Cantoblanco de la Universidad Autónoma de Madrid , C/Nicolás Cabrera 9, Madrid 28049, Spain
- Centro de Investigación en Recursos Naturales y Sustentabilidad (CIRENYS), Universidad Bernardo O' Higgins , Fábrica 1990, Segundo Piso, Santiago de Chile 8320000, Chile
| | - Irma Ares
- Department of Toxicology and Pharmacology, Faculty of Veterinary Medicine, Universidad Complutense de Madrid , Madrid 28040, Spain
| | - Javier Fontecha
- Instituto de Investigación en Ciencias de la Alimentación (CIAL, CSIC-UAM), Campus de Cantoblanco de la Universidad Autónoma de Madrid , C/Nicolás Cabrera 9, Madrid 28049, Spain
| | - María-Rosa Martínez-Larrañaga
- Department of Toxicology and Pharmacology, Faculty of Veterinary Medicine, Universidad Complutense de Madrid , Madrid 28040, Spain
| | - Arturo Anadón
- Department of Toxicology and Pharmacology, Faculty of Veterinary Medicine, Universidad Complutense de Madrid , Madrid 28040, Spain
| | - María-Aránzazu Martínez
- Department of Toxicology and Pharmacology, Faculty of Veterinary Medicine, Universidad Complutense de Madrid , Madrid 28040, Spain
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Seidel DV, Azcárate-Peril MA, Chapkin RS, Turner ND. Shaping functional gut microbiota using dietary bioactives to reduce colon cancer risk. Semin Cancer Biol 2017; 46:191-204. [PMID: 28676459 DOI: 10.1016/j.semcancer.2017.06.009] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2017] [Revised: 06/20/2017] [Accepted: 06/23/2017] [Indexed: 12/18/2022]
Abstract
Colon cancer is a multifactorial disease associated with a variety of lifestyle factors. Alterations in the gut microbiota and the intestinal metabolome are noted during colon carcinogenesis, implicating them as critical contributors or results of the disease process. Diet is a known determinant of health, and as a modifier of the gut microbiota and its metabolism, a critical element in maintenance of intestinal health. This review summarizes recent evidence demonstrating the role and responses of the intestinal microbiota during colon tumorigenesis and the ability of dietary bioactive compounds and probiotics to impact colon health from the intestinal lumen to the epithelium and systemically. We first describe changes to the intestinal microbiome, metabolome, and epithelium associated with colon carcinogenesis. This is followed by a discussion of recent evidence indicating how specific classes of dietary bioactives, prebiotics, or probiotics affect colon carcinogenesis. Lastly, we briefly address the prospects of using multiple 'omics' techniques to integrate the effects of diet, host, and microbiota on colon tumorigenesis with the goal of more fully appreciating the interconnectedness of these systems and thus, how these approaches can be used to advance personalized nutrition strategies and nutrition research.
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Affiliation(s)
- Derek V Seidel
- Nutrition and Food Science Department, and Faculty of Genetics, Texas A&M University, College Station, TX 77843-2253, USA.
| | - M Andrea Azcárate-Peril
- Department of Medicine GI Division, University of North Carolina, Chapel Hill, NC 27599-7555, USA.
| | - Robert S Chapkin
- Nutrition and Food Science Department, and Faculty of Genetics, Texas A&M University, College Station, TX 77843-2253, USA.
| | - Nancy D Turner
- Nutrition and Food Science Department, and Faculty of Genetics, Texas A&M University, College Station, TX 77843-2253, USA.
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15
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Romagnolo DF, Donovan MG, Papoutsis AJ, Doetschman TC, Selmin OI. Genistein Prevents BRCA1 CpG Methylation and Proliferation in Human Breast Cancer Cells with Activated Aromatic Hydrocarbon Receptor. Curr Dev Nutr 2017; 1:e000562. [PMID: 29955703 PMCID: PMC5998349 DOI: 10.3945/cdn.117.000562] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Revised: 03/02/2017] [Accepted: 05/19/2017] [Indexed: 01/11/2023] Open
Abstract
Background: Previous studies have suggested a causative role for agonists of the aromatic hydrocarbon receptor (AhR) in the etiology of breast cancer 1, early-onset (BRCA-1)-silenced breast tumors, for which prospects for treatment remain poor. Objectives: We investigated the regulation of BRCA1 by the soy isoflavone genistein (GEN) in human estrogen receptor α (ERα)-positive Michigan Cancer Foundation-7 (MCF-7) and ERα-negative sporadic University of Arizona Cell Culture-3199 (UACC-3199) breast cancer cells, respectively, with inducible and constitutively active AhR. Methods: In MCF-7 cells, we analyzed the dose- and time-dependent effects of GEN and (-)-epigallocatechin-3-gallate (EGCG) control, selected as prototype dietary DNA methyltransferase (DNMT) inhibitors, on BRCA-1 expression after AhR activation with 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) and in TCDD-washout experiments. We compared the effects of GEN and EGCG on BRCA1 cytosine-phosphate-guanine (CpG) methylation and cell proliferation. Controls for DNA methylation and proliferation were changes in expression of DNMT-1, cyclin D1, and p53, respectively. In UACC-3199 cells, we compared the effects of GEN and α-naphthoflavone (αNF; 7,8-benzoflavone), a synthetic flavone and AhR antagonist, on BRCA1 expression and CpG methylation, cyclin D1, and cell growth. Finally, we examined the effects of GEN and αNF on BRCA1, AhR-inducible cytochrome P450 (CYP)-1A1 (CYP1A1) and CYP1B1, and AhR mRNA expression. Results: In MCF-7 cells, GEN exerted dose- and time-dependent preventative effects against TCDD-dependent downregulation of BRCA-1. After TCDD washout, GEN rescued BRCA-1 protein expression while reducing DNMT-1 and cyclin D1. GEN and EGCG reduced BRCA1 CpG methylation and cell proliferation associated with increased p53. In UACC-3199 cells, GEN reduced BRCA1 and estrogen receptor-1 (ESR1) CpG methylation, cyclin D1, and cell growth while inducing BRCA-1 and CYP1A1. Conclusions: Results suggest preventative effects for GEN and EGCG against BRCA1 CpG methylation and downregulation in ERα-positive breast cancer cells with activated AhR. GEN and flavone antagonists of AhR may be useful for reactivation of BRCA1 and ERα via CpG demethylation in ERα-negative breast cancer cells harboring constitutively active AhR.
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Affiliation(s)
- Donato F Romagnolo
- Department of Nutritional Sciences, The University of Arizona, Tucson, AZ
- Department of The University of Arizona Cancer Center, The University of Arizona, Tucson, AZ
| | - Micah G Donovan
- Department of Nutritional Sciences, The University of Arizona, Tucson, AZ
- Department of The University of Arizona Cancer Center, The University of Arizona, Tucson, AZ
| | - Andreas J Papoutsis
- Department of Nutritional Sciences, The University of Arizona, Tucson, AZ
- Department of The University of Arizona Cancer Center, The University of Arizona, Tucson, AZ
| | - Tom C Doetschman
- Department of Cellular and Molecular Medicine, The University of Arizona, Tucson, AZ
- Department of The University of Arizona Cancer Center, The University of Arizona, Tucson, AZ
| | - Ornella I Selmin
- Department of Nutritional Sciences, The University of Arizona, Tucson, AZ
- Department of The University of Arizona Cancer Center, The University of Arizona, Tucson, AZ
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Niezgoda N, Gliszczyńska A, Kempińska K, Wietrzyk J, Wawrzeńczyk C. Synthesis and evaluation of cytotoxic activity of conjugated linoleic acid derivatives (esters, alcohols, and their acetates) toward cancer cell lines. EUR J LIPID SCI TECH 2017. [DOI: 10.1002/ejlt.201600470] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Natalia Niezgoda
- Department of Chemistry; Wrocław University of Environmental and Life Sciences; Wrocław Poland
| | - Anna Gliszczyńska
- Department of Chemistry; Wrocław University of Environmental and Life Sciences; Wrocław Poland
| | - Katarzyna Kempińska
- Ludwik Hirszfeld Institute of Immunology and Experimental Therapy; Polish Academy of Sciences; Wrocław Poland
| | - Joanna Wietrzyk
- Ludwik Hirszfeld Institute of Immunology and Experimental Therapy; Polish Academy of Sciences; Wrocław Poland
| | - Czesław Wawrzeńczyk
- Department of Chemistry; Wrocław University of Environmental and Life Sciences; Wrocław Poland
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17
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De Weirdt R, Hernandez-Sanabria E, Fievez V, Mees E, Geirnaert A, Van Herreweghen F, Vilchez-Vargas R, Van den Abbeele P, Jauregui R, Pieper DH, Vlaeminck B, Van de Wiele T. Mucosa-associated biohydrogenating microbes protect the simulated colon microbiome from stress associated with high concentrations of poly-unsaturated fat. Environ Microbiol 2017; 19:722-739. [DOI: 10.1111/1462-2920.13622] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Rosemarie De Weirdt
- Center for Microbial Ecology and Technology (CMET), Ghent University; Coupure Links 653 Ghent BE-9000 Belgium
| | - Emma Hernandez-Sanabria
- Center for Microbial Ecology and Technology (CMET), Ghent University; Coupure Links 653 Ghent BE-9000 Belgium
| | - Veerle Fievez
- Laboratory for Animal Nutrition and Product Quality (Lanupro); Ghent University; Proefhoevestraat 10 Melle BE-9090 Belgium
| | - Eva Mees
- Center for Microbial Ecology and Technology (CMET), Ghent University; Coupure Links 653 Ghent BE-9000 Belgium
| | - Annelies Geirnaert
- Center for Microbial Ecology and Technology (CMET), Ghent University; Coupure Links 653 Ghent BE-9000 Belgium
| | - Florence Van Herreweghen
- Center for Microbial Ecology and Technology (CMET), Ghent University; Coupure Links 653 Ghent BE-9000 Belgium
| | - Ramiro Vilchez-Vargas
- Center for Microbial Ecology and Technology (CMET), Ghent University; Coupure Links 653 Ghent BE-9000 Belgium
| | - Pieter Van den Abbeele
- Center for Microbial Ecology and Technology (CMET), Ghent University; Coupure Links 653 Ghent BE-9000 Belgium
| | - Ruy Jauregui
- Microbial Interactions and Processes Research Group, Department of Molecular Infection Biology; Helmholtz Centre for Infection Research; Inhoffenstraβe 7 Braunschweig D-38124 Germany
| | - Dietmar H. Pieper
- Microbial Interactions and Processes Research Group, Department of Molecular Infection Biology; Helmholtz Centre for Infection Research; Inhoffenstraβe 7 Braunschweig D-38124 Germany
| | - Bruno Vlaeminck
- Laboratory for Animal Nutrition and Product Quality (Lanupro); Ghent University; Proefhoevestraat 10 Melle BE-9090 Belgium
| | - Tom Van de Wiele
- Center for Microbial Ecology and Technology (CMET), Ghent University; Coupure Links 653 Ghent BE-9000 Belgium
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18
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Wang L, Wang X, Wang P, Xiao Y, Liu Q. Optimization of supercritical carbon dioxide extraction, physicochemical and cytotoxicity properties of Gynostemma pentaphyllum seed oil: A potential source of conjugated linolenic acids. Sep Purif Technol 2016. [DOI: 10.1016/j.seppur.2016.01.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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19
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Selmin OI, Fang C, Lyon AM, Doetschman TC, Thompson PA, Martinez JD, Smith JW, Lance PM, Romagnolo DF. Inactivation of Adenomatous Polyposis Coli Reduces Bile Acid/Farnesoid X Receptor Expression through Fxr gene CpG Methylation in Mouse Colon Tumors and Human Colon Cancer Cells. J Nutr 2016; 146:236-42. [PMID: 26609171 PMCID: PMC6636391 DOI: 10.3945/jn.115.216580] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Accepted: 11/03/2015] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND The farnesoid X receptor (FXR) regulates bile acid (BA) metabolism and possesses tumor suppressor functions. FXR expression is reduced in colorectal tumors of subjects carrying inactivated adenomatous polyposis coli (APC). Identifying the mechanisms responsible for this reduction may offer new molecular targets for colon cancer prevention. OBJECTIVE We investigated how APC inactivation influences the regulation of FXR expression in colonic mucosal cells. We hypothesized that APC inactivation would epigenetically repress nuclear receptor subfamily 1, group H, member 4 (FXR gene name) expression through increased CpG methylation. METHODS Normal proximal colonic mucosa and normal-appearing adjacent colonic mucosa and colon tumors were collected from wild-type C57BL/6J and Apc-deficient (Apc(Min) (/+)) male mice, respectively. The expression of Fxr, ileal bile acid-binding protein (Ibabp), small heterodimer partner (Shp), and cyclooxygenase-2 (Cox-2) were determined by real-time polymerase chain reaction. In both normal and adjacent colonic mucosa and colon tumors, we measured CpG methylation of Fxr in bisulfonated genomic DNA. In vitro, we measured the impact of APC inactivation and deoxycholic acid (DCA) treatment on FXR expression in human colon cancer HCT-116 cells transfected with silencing RNA for APC and HT-29 cells carrying inactivated APC. RESULTS In Apc(Min) (/+) mice, constitutive CpG methylation of the Fxrα3/4 promoter was linked to reduced (60-90%) baseline Fxr, Ibabp, and Shp and increased Cox-2 expression in apparently normal adjacent mucosa and colon tumors. Apc knockdown in HCT-116 cells increased cellular myelocytomatosis (c-MYC) and lowered (∼50%) FXR expression, which was further reduced (∼80%) by DCA. In human HCT-116 but not HT-29 colon cancer cells, DCA induced FXR expression and lowered CpG methylation of FXR. CONCLUSIONS We conclude that the loss of APC function favors the silencing of FXR expression through CpG hypermethylation in mouse colonic mucosa and human colon cells, leading to reduced expression of downstream targets (SHP, IBABP) involved in BA homeostasis while increasing the expression of factors (COX-2, c-MYC) that contribute to inflammation and colon cancer.
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Affiliation(s)
- Ornella I Selmin
- Department of Nutritional Sciences, University of Arizona, Tucson, AZ,University of Arizona Cancer Center, University of Arizona, Tucson, AZ
| | - Changming Fang
- University of Arizona Cancer Center, University of Arizona, Tucson, AZ
| | - Adam M Lyon
- Department of Nutritional Sciences, University of Arizona, Tucson, AZ
| | - Tom C Doetschman
- University of Arizona Cancer Center, University of Arizona, Tucson, AZ
| | | | - Jesse D Martinez
- University of Arizona Cancer Center, University of Arizona, Tucson, AZ
| | - Jeffrey W Smith
- Sanford/Burnham Medical Research Institute, Cancer Center Division, La
Jolla, CA
| | - Peter M Lance
- University of Arizona Cancer Center, University of Arizona, Tucson, AZ
| | - Donato F Romagnolo
- Department of Nutritional Sciences and University of Arizona Cancer Center, University of Arizona, Tucson, AZ; and
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20
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Niezgoda N, Gliszczyńska A, Gładkowski W, Kempińska K, Wietrzyk J, Wawrzeńczyk C. Phosphatidylcholine with cis-9,trans-11 and trans-10,cis-12 Conjugated Linoleic Acid Isomers: Synthesis and Cytotoxic Studies. Aust J Chem 2015. [DOI: 10.1071/ch14606] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Novel phosphatidylcholines and lysophosphatidylcholines with cis-9,trans-11 and trans-10,cis-12 conjugated linoleic acid (CLA) were synthesized in high yields (75–99 %). The in vitro cytotoxic activities of these compounds against three human cancer cell lines (HL-60, MCF-7, and HT-29) were evaluated. The results revealed that there are differences in the activity between phosphatidylcholine with cis-9,trans-11 and trans-10,cis-12 CLA acyl groups. 1,2-Di(9Z,11E)-octadecadienoyl-sn-glycero-3-phosphocholine was the most potent cytotoxic agent among all tested CLA derivatives and its IC50 (concentration of a compound that inhibits the proliferation of 50 % of the cancer cell population) was 29.4 µM against HL-60. Moreover, phosphatidylcholines with CLA acyls exhibited much lower cytotoxicity against non-cancer cells (Balb/3T3) than free CLA isomers.
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21
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The mammary gland in small ruminants: major morphological and functional events underlying milk production--a review. J DAIRY RES 2014; 81:304-18. [PMID: 24901899 DOI: 10.1017/s0022029914000235] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The importance of small ruminants to the dairy industry has increased in recent years, especially in developing countries, where it has a high economic and social impact. Interestingly and despite the fact that the mammary gland is the specialised milk production organ, very few authors studied the modifications occurring in the mammary gland through the lactation period in production animals, particularly in the small ruminants, sheep (Ovis aries) and goat (Capra hircus). Nevertheless, understanding the different mammary gland patterns throughout lactation is essential to improve dairy production. In addition, associating these patterns with different milking frequencies, lactation number or different diets is also of high importance, directly affecting the dairy industry. The mammary gland is commonly composed of parenchyma and stroma, which includes the ductal system, with individual proportions of each changing during the different periods and yields in a lactation cycle. Indeed, during late gestation, as well as during early to mid-lactation, mammary gland expansion occurs, with an increase in the number of epithelial cells and lumen area, which leads to increment of the parenchyma tissue, as well as a reduction of stroma, corresponding macroscopically to the increase in mammary gland volume. Throughout late lactation, the mammary gland volume decreases owing to the regression of the secretory structure. In general, common mammary gland patterns have been shown for both goats and sheep throughout the several lactation stages, although the number of studies is limited. The main objective of this manuscript is to review the colostrogenesis and lactogenesis processes as well as to highlight the mammary gland morphological patterns underlying milk production during the lactation cycle for small ruminants, and to describe potential differences between goats and sheep, hence contributing to a better description of mammary gland development during lactation for these two poorly studied species.
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Trans-10, cis 12-Conjugated Linoleic Acid-Induced Milk Fat Depression Is Associated with Inhibition of PPARγ Signaling and Inflammation in Murine Mammary Tissue. J Lipids 2013; 2013:890343. [PMID: 23762566 PMCID: PMC3666273 DOI: 10.1155/2013/890343] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2012] [Accepted: 03/18/2013] [Indexed: 12/19/2022] Open
Abstract
Exogenous trans-10, cis-12-CLA (CLA) reduces lipid synthesis in murine adipose and mammary (MG) tissues. However, genomewide alterations in MG and liver (LIV) associated with dietary CLA during lactation remain unknown. We fed mice (n = 5/diet) control or control + trans-10, cis-12-CLA (37 mg/day) between d 6 and d 10 postpartum. The 35,302 annotated murine exonic evidence-based oligo (MEEBO) microarray and quantitative RT-PCR were used for transcript profiling. Milk fat concentration was 44% lower on d 10 versus d 6 due to CLA. The CLA diet resulted in differential expression of 1,496 genes. Bioinformatics analyses underscored that a major effect of CLA on MG encompassed alterations in cellular signaling pathways and phospholipid species biosynthesis. Dietary CLA induced genes related to ER stress (Xbp1), apoptosis (Bcl2), and inflammation (Orm1, Saa2, and Cp). It also induced marked inhibition of PPAR γ signaling, including downregulation of Pparg and Srebf1 and several lipogenic target genes (Scd, Fasn, and Gpam). In LIV, CLA induced hepatic steatosis probably through perturbations in the mitochondrial functions and induction of ER stress. Overall, results from this study underscored the role of PPAR γ signaling on mammary lipogenic target regulation. The proinflammatory effect due to CLA could be related to inhibition of PPAR γ signaling.
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Niezgoda N, Mituła P, Kempińska K, Wietrzyk J, Wawrzeńczyk C. Synthesis of Phosphatidylcholine with Conjugated Linoleic Acid and Studies on Its Cytotoxic Activity. Aust J Chem 2013. [DOI: 10.1071/ch12404] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Phospholipids with conjugated linoleic acid (CLA), which are potential lipid prodrugs, were synthesised. CLA was obtained by the alkali-isomerisation of linoleic acid and was subsequently used in the synthesis of 1,2-di(conjugated)linoleoyl-sn-glycero-3-phosphocholine in good (82 %) yield. 1-Palmitoyl-2-(conjugated)linoleoyl-sn-glycero-3-phosphocholine was obtained by a two-step synthesis in 87 % yield. All the compounds were tested in an in vitro cytotoxicity assay against two human cancer cell lines, HL-60 and MCF-7, and a mouse fibroblast cell line, Balb/3T3. The free form of CLA exhibited the highest activity against all cancer cell lines. Results obtained for the Balb/3T3 line proved that phosphatidylcholine derivatives decreased the cytotoxic effect of CLA against healthy cell lines.
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Romagnolo DF, Milner JA. Opportunities and challenges for nutritional proteomics in cancer prevention. J Nutr 2012; 142:1360S-9S. [PMID: 22649262 DOI: 10.3945/jn.111.151803] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Knowledge gaps persist about the efficacy of cancer prevention strategies based on dietary food components. Adaptations to nutrient supply are executed through tuning of multiple protein networks that include transcription factors, histones, modifying enzymes, translation factors, membrane and nuclear receptors, and secreted proteins. However, the simultaneous quantitative and qualitative measurement of all proteins that regulate cancer processes is not practical using traditional protein methodologies. Proteomics offers an attractive opportunity to fill this knowledge gap and unravel the effects of dietary components on protein networks that impinge on cancer. The articles presented in this supplement are from talks proffered in the "Nutrition Proteomics and Cancer Prevention" session at the American Institute for Cancer Research Annual Research Conference on Food, Nutrition, Physical Activity and Cancer held in Washington, DC on October 21 and 22, 2010. Recent advances in MS technologies suggest that studies in nutrition and cancer prevention may benefit from the adoption of proteomic tools to elucidate the impact on biological processes that govern the transition from normal to malignant phenotype; to identify protein changes that determine both positive and negative responses to food components; to assess how protein networks mediate dose-, time-, and tissue-dependent responses to food components; and, finally, for predicting responders and nonresponders. However, both the limited accessibility to proteomic technologies and research funding appear to be hampering the routine adoption of proteomic tools in nutrition and cancer prevention research.
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Affiliation(s)
- Donato F Romagnolo
- Department of Nutritional Sciences and The University of Arizona Cancer Center, The University of Arizona, Tucson, AZ, USA.
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Okui T, Hashimoto M, Katakura M, Shido O. Cis-9,trans-11-conjugated linoleic acid promotes neuronal differentiation through regulation of Hes6 mRNA and cell cycle in cultured neural stem cells. Prostaglandins Leukot Essent Fatty Acids 2011; 85:163-9. [PMID: 21723718 DOI: 10.1016/j.plefa.2011.06.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2010] [Revised: 03/23/2011] [Accepted: 06/08/2011] [Indexed: 10/18/2022]
Abstract
Conjugated linoleic acids (CLAs) are positional and geometrical isomers of linoleic acid (LA). Cis-9,trans-11-CLA (CLA), the main isomer of CLAs in foods derived from ruminants, has several beneficial effects for humans and animals; however, its effects on the central nervous system are largely unknown. In this study, we investigated the effects of LA and CLA on neuronal differentiation of neural stem cells (NSCs). NSCs cultured with or without LA and CLA were assessed by immunofluorescence staining, mRNA measurement of basic helix-loop-helix transcription factors and cyclin-dependent kinase inhibitors by real-time PCR, BrdU incorporation analysis and flow cytometry analysis. In NSCs treated with CLA, the number of Tuj-1-positive cells (neurons) and the mRNA expression levels of Hes6, MAP2, p21(cip1) and p27(kip1) increased, while the proportion of S-phase cells decreased; compared with the control, no change was demonstrated in NSCs treated with LA. These results suggest that CLA promotes neuronal differentiation by increasing, in part, the expression of Hes6 mRNA and by activating p21(cip1) and p27(kip1) to arrest cell cycle.
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Affiliation(s)
- Toshiyuki Okui
- Department of Environmental Physiology, Shimane University Faculty of Medicine, Izumo, Shimane 693-8501, Japan
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Heinze VM, Actis AB. Dietary conjugated linoleic acid and long-chain n-3 fatty acids in mammary and prostate cancer protection: a review. Int J Food Sci Nutr 2011; 63:66-78. [PMID: 21762028 DOI: 10.3109/09637486.2011.598849] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The role of dietary fatty acids on cancer is still controversial. To examine the current literature on the protective role of conjugated linoleic acid (CLA) and marine long-chain fatty acids [eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA)] and the risk of breast and prostate cancer, data from 41 case-control and cohort studies and relevant in vitro and animal experiments were included in this 2000-2010 revision. Epidemiological studies on CLA intake or its tissue concentration related to breast and prostate tumorigenesis are not conclusive; EPA and DHA intake have shown important inverse associations just in some studies. Additional research on the analysed association is required.
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Affiliation(s)
- Verónica M Heinze
- Facultad de Ciencias de la Salud, Universidad Adventista del Plata, 25 de Mayo 99, 3103 Libertador San Martín, Entre Ríos, Argentina.
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Gebauer SK, Chardigny JM, Jakobsen MU, Lamarche B, Lock AL, Proctor SD, Baer DJ. Effects of ruminant trans fatty acids on cardiovascular disease and cancer: a comprehensive review of epidemiological, clinical, and mechanistic studies. Adv Nutr 2011; 2:332-54. [PMID: 22332075 PMCID: PMC3125683 DOI: 10.3945/an.111.000521] [Citation(s) in RCA: 164] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
There are 2 predominant sources of dietary trans fatty acids (TFA) in the food supply, those formed during the industrial partial hydrogenation of vegetable oils (iTFA) and those formed by biohydrogenation in ruminants (rTFA), including vaccenic acid (VA) and the naturally occurring isomer of conjugated linoleic acid, cis-9, trans-11 CLA (c9,t11-CLA). The objective of this review is to evaluate the evidence base from epidemiological and clinical studies to determine whether intake of rTFA isomers, specifically VA and c9,t11-CLA, differentially affects risk of cardiovascular disease (CVD) and cancer compared with iTFA. In addition, animal and cell culture studies are reviewed to explore potential pro- and antiatherogenic mechanisms of VA and c9,t11-CLA. Some epidemiological studies suggest that a positive association with coronary heart disease risk exists between only iTFA isomers and not rTFA isomers. Small clinical studies have been conducted to establish cause-and-effect relationships between these different sources of TFA and biomarkers or risk factors of CVD with inconclusive results. The lack of detection of treatment effects reported in some studies may be due to insufficient statistical power. Many studies have used doses of rTFA that are not realistically attainable via diet; thus, further clinical studies are warranted. Associations between iTFA intake and cancer have been inconsistent, and associations between rTFA intake and cancer have not been well studied. Clinical studies have not been conducted investigating the cause-and-effect relationship between iTFA and rTFA intake and risk for cancers. Further research is needed to determine the health effects of VA and c9,t11-CLA in humans.
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Affiliation(s)
- Sarah K. Gebauer
- USDA, Agricultural Research Service, Beltsville Human Nutrition Research Center, Beltsville, MD 20705
| | - Jean-Michel Chardigny
- Clermont Université, Université d'Auvergne, Unité de Nutrition Humaine, BP 10448, F-63000 Clermont-Ferrand, France
- INRA, UMR 1019, UNH, CRNH Auvergne, F-63000 Clermont-Ferrand, France
| | - Marianne Uhre Jakobsen
- Department of Epidemiology, School of Public Health, Aarhus University, DK-8000 Aarhus, Denmark
| | - Benoît Lamarche
- Institute on Nutraceuticals and Functional Foods, Laval University, Québec, QC, Canada G1V 0A
| | - Adam L. Lock
- Department of Animal Science, Michigan State University, East Lansing, MI 48864
| | - Spencer D. Proctor
- Metabolic and Cardiovascular Laboratory, Alberta Institute for Human Nutrition and Alberta Diabetes Institute, University of Alberta, AB, Canada T6G2P5
| | - David J. Baer
- USDA, Agricultural Research Service, Beltsville Human Nutrition Research Center, Beltsville, MD 20705
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Philippaerts A, Goossens S, Jacobs PA, Sels BF. Catalytic production of conjugated fatty acids and oils. CHEMSUSCHEM 2011; 4:684-702. [PMID: 21634014 DOI: 10.1002/cssc.201100086] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2011] [Indexed: 05/30/2023]
Abstract
The reactive double bonds in conjugated vegetable oils are of high interest in industry. Traditionally, conjugated vegetable oils are added to paints, varnishes, and inks to improve their drying properties, while recently there is an increased interest in their use in the production of bioplastics. Besides the industrial applications, also food manufactures are interested in conjugated vegetable oils due to their various positive health effects. While the isomer type is less important for their industrial purposes, the beneficial health effects are mainly associated with the c9,t11, t10,c12 and t9,t11 CLA isomers. The production of CLA-enriched oils as additives in functional foods thus requires a high CLA isomer selectivity. Currently, CLAs are produced by conjugation of oils high in linoleic acid, for example soybean and safflower oil, using homogeneous bases. Although high CLA productivities and very high isomer selectivities are obtained, this process faces many ecological drawbacks. Moreover, CLA-enriched oils can not be produced directly with the homogeneous bases. Literature reports describe many catalytic processes to conjugate linoleic acid, linoleic acid methyl ester, and vegetable oils rich in linoleic acid: biocatalysts, for example enzymes and cells; metal catalysts, for example homogeneous metal complexes and heterogeneous catalysts; and photocatalysts. This Review discusses state-of-the-art catalytic processes in comparison with some new catalytic production routes. For each category of catalytic process, the CLA productivities and the CLA isomer selectivity are compared. Heterogeneous catalysis seems the most attractive approach for CLA production due to its easy recovery process, provided that the competing hydrogenation reaction is limited and the CLA production rate competes with the current homogeneous base catalysis. The most important criteria to obtain high CLA productivity and isomer selectivity are (1) absence of a hydrogen donor, (2) absence of catalyst acidity, (3) high metal dispersion, and (4) highly accessible pore architecture.
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Affiliation(s)
- An Philippaerts
- Department M2S, K.U. Leuven, Kasteelpark Arenberg 23, 3001 Heverlee, Belgium
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Kadamne JV, Castrodale CL, Proctor A. Measurement of conjugated linoleic acid (CLA) in CLA-rich potato chips by ATR-FTIR spectroscopy. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:2190-2196. [PMID: 21329354 DOI: 10.1021/jf104204e] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A conjugated linoleic acid (CLA)-rich soy oil has been produced by photoisomerization of soy oil linoleic acid. Nutritional studies have shown that CLA possesses health benefits in terms of reducing certain heart disease and diabetes risk factors. Potato chips are snacks that are readily produced in the CLA-rich soy oil containing CLA levels similar to those of the oil used for frying. The objective of this study was to develop an FTIR method to rapidly determine the CLA content of oil in potato chips. Photoirradiated soy oil samples with ∼25% total CLA were mixed with control soy oil, and 100 soy oil samples with total CLA levels ranging from 0.89 to 24.4% were made. Potato chips were fried using each of these 300 g CLA rich soy oil mixtures at 175 °C for approximately 3 min. Duplicate GC-FID fatty acid analyses were conducted on oil extracted from each batch of potato chips. The chip samples were ground and then scanned using ATR-FTIR spectroscopy with the aid of a high-pressure clamp, and duplicate spectra of each sample were averaged to obtain an average spectrum. Calibration models were developed using PLS regression analysis. These correlated the CLA isomer concentrations of potato chips obtained by GC-FID fatty acid analysis with their corresponding FTIR spectral features. The calibration models were fully cross validated and tested using samples that were not used in the calibration sample set. Calibrations for total CLA, trans,trans CLA, trans-10,cis-12 CLA, trans-9,cis-11 CLA, cis-10,trans-12 CLA, and cis-9,trans-11 CLA had coefficients of determinations (R2v) between 0.91 and 0.96 and corresponding root-mean-square error of prediction (RMSEP) ranging from 0.005 to 1.44. The ATR-FTIR technique showed potential as a method for the determination of the CLA levels in unknown potato chip samples.
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Affiliation(s)
- Jeta V Kadamne
- Department of Food Science, University of Arkansas , 2650 North Young Avenue, Fayetteville, Arkansas 72704, United States
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SATO K, SHINOHARA N, HONMA T, ITO J, ARAI T, NOSAKA N, AOYAMA T, TSUDUKI T, IKEDA I. The Change in Conjugated Linoleic Acid Concentration in Blood of Japanese Fed a Conjugated Linoleic Acid Diet. J Nutr Sci Vitaminol (Tokyo) 2011; 57:364-71. [DOI: 10.3177/jnsv.57.364] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Rosberg-Cody E, Stanton C, O'Mahony L, Wall R, Shanahan F, Quigley EM, Fitzgerald GF, Ross RP. Recombinant lactobacilli expressing linoleic acid isomerase can modulate the fatty acid composition of host adipose tissue in mice. MICROBIOLOGY-SGM 2010; 157:609-615. [PMID: 21178166 DOI: 10.1099/mic.0.043406-0] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
We have previously demonstrated that oral administration of a metabolically active Bifidobacterium breve strain, with ability to form cis-9, trans-11 conjugated linoleic acid (CLA), resulted in modulation of the fatty acid composition of the host, including significantly elevated concentrations of c9, t11 CLA and omega-3 (n-3) fatty acids in liver and adipose tissue. In this study, we investigated whether a recombinant lactobacillus expressing linoleic acid isomerase (responsible for production of t10, c12 CLA) from Propionibacterium acnes (PAI) could influence the fatty acid composition of different tissues in a mouse model. Linoleic-acid-supplemented diets (2 %, w/w) were fed in combination with either a recombinant t10, c12 CLA-producing Lactobacillus paracasei NFBC 338 (Lb338), or an isogenic (vector-containing) control strain, to BALB/c mice for 8 weeks. A third group of mice received linoleic acid alone (2 %, w/w). Tissue fatty acid composition was assessed by GLC at the end of the trial. Ingestion of the strain expressing linoleic acid isomerase was associated with a 4-fold increase (P<0.001) in t10, c12 CLA in adipose tissues of the mice when compared with mice that received the isogenic non-CLA-producing strain. The livers of the mice that received the recombinant CLA-producing Lb338 also contained a 2.5-fold (albeit not significantly) higher concentration of t10, c12 CLA, compared to the control group. These data demonstrate that a single gene (encoding linoleic acid isomerase) expressed in an intestinal microbe can influence the fatty acid composition of host fat.
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Affiliation(s)
- Eva Rosberg-Cody
- Teagasc Moorepark Food Research Centre, Fermoy, Co. Cork, Ireland.,Department of Microbiology, University College Cork, National University of Ireland, Co. Cork, Ireland.,Alimentary Pharmabiotic Centre (APC), Cork, Ireland
| | - Catherine Stanton
- Teagasc Moorepark Food Research Centre, Fermoy, Co. Cork, Ireland.,Alimentary Pharmabiotic Centre (APC), Cork, Ireland
| | | | - Rebecca Wall
- Alimentary Pharmabiotic Centre (APC), Cork, Ireland
| | | | | | - Gerald F Fitzgerald
- Department of Microbiology, University College Cork, National University of Ireland, Co. Cork, Ireland.,Alimentary Pharmabiotic Centre (APC), Cork, Ireland
| | - R Paul Ross
- Teagasc Moorepark Food Research Centre, Fermoy, Co. Cork, Ireland.,Alimentary Pharmabiotic Centre (APC), Cork, Ireland
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Flowers M, Schroeder JA, Borowsky AD, Besselsen DG, Thomson CA, Pandey R, Thompson PA. Pilot study on the effects of dietary conjugated linoleic acid on tumorigenesis and gene expression in PyMT transgenic mice. Carcinogenesis 2010; 31:1642-9. [PMID: 20624750 DOI: 10.1093/carcin/bgq148] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Conjugated linoleic acid (CLA) is a class of commercially available fatty acids that have been associated with anticancer properties in rodent models of chemical carcinogenesis. We conducted a pilot study to examine the antitumor effect of dietary CLA in a polyoma virus-middle T antigen (PyMT) mouse model of invasive breast cancer. Virgin 4-week-old PyMT mice were administered a mixed-isomer CLA diet (1% wt/wt) or control AIN-93G diet for 4 weeks (N = 6 and 5, respectively) and tumor burden was assessed at 8 weeks of age. Thoracic mammary glands were prepared as whole mounts with other glands being formalin fixed and paraffin embedded for histology and immunohistochemistry (IHC). Total RNA was prepared for microarray and real-time reverse transcription-polymerase chain reaction analysis. Western blots were performed for protein expression analysis. Tumor incidence was significantly increased in CLA-treated animals compared with controls (P = 0.009) and occurred with extensive lobular-alveolar expansion and loss of mammary adipose tissue. More than 100 genes were downregulated > or = 2-fold in the CLA-treated group compared with controls, including adipose-specific markers, as wells as cytoskeletal and adhesion-related genes. This was supported by dramatic decreases in the epithelial adherens E-cadherin and beta-catenin as demonstrated by IHC. Taken together, these results suggest that dietary CLA affects the mammary stromal environment, leading to tumor progression and cellular expansion in the PyMT mouse model. Further studies of the potential for cancer promotion are needed, especially because mixed-isomer CLA formulations are sold commercially as a nutritional supplement.
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Affiliation(s)
- Margaret Flowers
- Department of Experimental Therapeutics, John Wayne Cancer Institute, 2200 Santa Monica Boulevard, Santa Monica, CA 90404, USA.
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Eder K, Ringseis R. Metabolism and actions of conjugated linoleic acids on atherosclerosis-related events in vascular endothelial cells and smooth muscle cells. Mol Nutr Food Res 2010; 54:17-36. [PMID: 19760681 DOI: 10.1002/mnfr.200900042] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Conjugated linoleic acids (CLAs) are biologically highly active lipid compounds that have attracted great scientific interest due to their ability to cause either inhibition of atherosclerotic plaque development or even regression of pre-established atherosclerotic plaques in mice, hamsters and rabbits. The underlying mechanisms of action, however, are only poorly understood. Since cell culture experiments are appropriate to gain insight into the mechanisms of action of a compound, the present review summarizes data from cell culture studies about the metabolism and the actions of CLAs on atherosclerosis-related events in endothelial cells (ECs) and smooth muscle cells (SMCs), which are important cells contributing to atherosclerotic lesion development. Based on these studies, it can be concluded that CLAs exert several beneficial actions including inhibition of inflammatory and vasoactive mediator release from ECs and SMCs, which may help explain the anti-atherogenic effect of CLAs observed in vivo. The observation that significant levels of CLA metabolites, which have been reported to have significant biological activities, are well detectable in ECs and SMCs indicates that the anti-atherogenic effects observed with CLAs are presumably mediated not only by CLAs themselves but also by their metabolites.
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Affiliation(s)
- Klaus Eder
- Center of Life and Food Sciences Weihenstephan, Technische Universität München, Freising, Germany
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Lau DSY, Archer MC. The 10t,12c isomer of conjugated linoleic acid inhibits fatty acid synthase expression and enzyme activity in human breast, colon, and prostate cancer cells. Nutr Cancer 2010; 62:116-21. [PMID: 20043266 DOI: 10.1080/01635580903191536] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
The objective of this study was to determine whether downregulation of fatty acid synthase (FAS) expression and/or inhibition of its activity by the two major CLA isomers, 10t,12c and 9c,11t CLA, could contribute to their inhibitory effect on the growth of human breast (MCF-7), colon (HT-29) and prostate (LNCaP) cancer cell lines. We first confirmed and extended the results of others showing that the inhibitory action of CLA on proliferation is dependent on the cell type as well as the structure of the isomer, the 10,12 isomer being a more potent inhibitor than the 9,11 isomer in the concentration range 25-100 microM. By Western analysis, we showed that 10,12 CLA downregulated FAS expression in all of the cell lines in a concentration-dependent manner, but the 9,11 isomer had no effect. Both isomers inhibited FAS enzyme activity, but 10,12 CLA was again more potent than the 9,11 isomer. Our results suggest that downregulation of FAS by 10,12 CLA, but not by the 9,11 isomer, as well as inhibition of FAS enzyme activity by both isomers, may contribute to growth inhibition of cancer cells but only at relatively high concentrations.
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Moon HS, Guo DD, Lee HG, Choi YJ, Kang JS, Jo K, Eom JM, Yun CH, Cho CS. Alpha-eleostearic acid suppresses proliferation of MCF-7 breast cancer cells via activation of PPARgamma and inhibition of ERK 1 / 2. Cancer Sci 2010; 101:396-402. [PMID: 19917060 PMCID: PMC11159632 DOI: 10.1111/j.1349-7006.2009.01389.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Alpha-eleostearic acid (alpha-ESA) is known to suppress the growth in cancer cells although its underlying molecular mechanisms have not been fully elucidated. The present study was designed to elucidate and evaluate the anticancer mechanism of alpha-ESA on MCF-7 breast cancer cells. Also, an attempt was made to better understand the anticancer mechanism by which alpha-ESA activated PPARgamma and attenuated the ERK1/2 MAPK phosphorylation state. The MCF-7 breast cancer cell-line and nontumorigenic MCF-10A human mammary epithelial cells were treated with alpha-ESA and compared with negative control (without treatment) and positive control groups (treated with rosiglitazone), and changes of apoptosis-related molecules, PPARgamma and pERK1/2 were examined. In MCF-7 cells treated with alpha-ESA, we found that the expression of p53, p21, and Bax was up-regulated whereas expression of Bcl-2 and procaspase-9 was down-regulated. Moreover, nuclear translocation of PPARgamma by alpha-ESA positively correlated with inhibition of ERK1/2 activation. Our data suggest that alpha-ESA can be considered to be a PPARgamma agonist and thus a candidate for a chemotherapeutic agent against breast cancer.
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Affiliation(s)
- Hyun-Seuk Moon
- Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul, Korea
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Benjamin S, Spener F. Conjugated linoleic acids as functional food: an insight into their health benefits. Nutr Metab (Lond) 2009; 6:36. [PMID: 19761624 PMCID: PMC2754987 DOI: 10.1186/1743-7075-6-36] [Citation(s) in RCA: 151] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2009] [Accepted: 09/18/2009] [Indexed: 12/17/2022] Open
Abstract
This review evaluates the health benefits of the functional food, conjugated linoleic acids (CLA) - a heterogeneous group of positional and geometric isomers of linoleic acid predominantly found in milk, milk products, meat and meat products of ruminants. During the past couple of decades, hundreds of reports - principally based on in vitro, microbial, animal, and of late clinical trials on humans - have been accumulating with varying biological activities of CLA isomers. These studies highlight that CLA, apart form the classical nuclear transcription factors-mediated mechanism of action, appear to exhibit a number of inter-dependent molecular signalling pathways accounting for their reported health benefits. Such benefits relate to anti-obesitic, anti-carcinogenic, anti-atherogenic, anti-diabetagenic, immunomodulatory, apoptotic and osteosynthetic effects. On the other hand, negative effects of CLA have been reported such as fatty liver and spleen, induction of colon carcinogenesis and hyperproinsulinaemia. As far as human consumption is concerned, a definite conclusion for CLA safety has not been reached yet. Parameters such as administration of the type of CLA isomer and/or their combination with other polyunsaturated fatty acids, mode of administration (eg., as free fatty acid or its triglyceride form, liquid or solid), daily dose and duration of consumption, gender, age, or ethnic and geographical backgrounds remain to be determined. Yet, it appears from trials so far conducted that CLA are functional food having prevailing beneficial health effects for humans.
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Affiliation(s)
- Sailas Benjamin
- Department of Biochemistry, University of Münster, 48149 Münster, Germany.
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Abstract
Conjugated linoleic acids (CLA) are biologically highly active lipid compounds that inhibit the development of atherosclerotic plaques in experimental animals. The underlying mechanisms of action, however, are only poorly understood. Since cell-culture experiments are appropriate to provide a detailed view into the mechanisms of action of a compound, the present review summarises results fromin vitrostudies dealing with the effects of CLA isomers and CLA mixtures on functional properties of cells of the vascular wall, such as endothelial cells, smooth muscle cells and monocyte-derived macrophages, which are amongst the major cells contributing to atherosclerotic lesion development. Based on these studies, it can be concluded that CLA exert several beneficial actions in cells of the vascular wall through the activation of nuclear PPAR. These actions of CLA, which may, at least partially, explain the inhibition of atherogenesis by dietary CLA, include modulation of vasoactive mediator release from endothelial cells, inhibition of inflammatory and fibrotic processes in activated smooth muscle cells, abrogation of inflammatory responses in activated macrophages, and reduction of cholesterol accumulation in macrophage-derived foam cells.
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Wall R, Ross RP, Shanahan F, O'Mahony L, O'Mahony C, Coakley M, Hart O, Lawlor P, Quigley EM, Kiely B, Fitzgerald GF, Stanton C. Metabolic activity of the enteric microbiota influences the fatty acid composition of murine and porcine liver and adipose tissues. Am J Clin Nutr 2009; 89:1393-401. [PMID: 19357220 DOI: 10.3945/ajcn.2008.27023] [Citation(s) in RCA: 131] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Recent reports suggest that the metabolic activity of the gut microbiota may contribute to the pathogenesis of obesity and hepatic steatosis. OBJECTIVE The objective was to determine whether the fat composition of host tissues might be influenced by oral administration of commensal bifidobacteria previously shown by us to produce bioactive isomers of conjugated linoleic acid (CLA). DESIGN Murine trials were conducted in which linoleic acid-supplemented diets were fed with or without Bifidobacterium breve NCIMB 702258 (daily dose of 10(9) microorganisms) to healthy BALB/c mice and to severe combined immunodeficient mice for 8-10 wk. To ensure that the observations were not peculiar to mice, a similar trial was conducted in weanling pigs over 21 d. Tissue fatty acid composition was assessed by gas-liquid chromatography. RESULTS In comparison with controls, there was an increase in cis-9, trans-11 CLA in the livers of the mice and pigs after feeding with linoleic acid in combination with B. breve NCIMB 702258 (P < 0.05). In addition, an altered profile of polyunsaturated fatty acid composition was observed, including higher concentrations of the omega-3 (n-3) fatty acids eicosapentaenoic acid and docosahexaenoic acid in adipose tissue (P < 0.05). These changes were associated with reductions in the proinflammatory cytokines tumor necrosis factor-alpha and interferon-gamma (P < 0.05). CONCLUSIONS These results are consistent with the concept that the metabolome is a composite of host and microbe metabolic activity and that the influence of the microbiota on host fatty acid composition can be manipulated by oral administration of CLA-producing microorganisms.
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Flowers M, Thompson PA. t10c12 conjugated linoleic acid suppresses HER2 protein and enhances apoptosis in SKBr3 breast cancer cells: possible role of COX2. PLoS One 2009; 4:e5342. [PMID: 19399184 PMCID: PMC2671134 DOI: 10.1371/journal.pone.0005342] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2009] [Accepted: 03/31/2009] [Indexed: 12/29/2022] Open
Abstract
Background HER2-targeted therapy with the monoclonal antibody trastuzumab (Herceptin®) has improved disease-free survival for women diagnosed with HER2-positive breast cancers; however, treatment resistance and disease progression are not uncommon. Current data suggest that resistance to treatment in HER2 cancers may be a consequence of NF-κB overexpression and increased COX2-derived prostaglandin E2 (PGE2). Conjugated linoleic acid (CLA) has been shown to have anti-tumor properties and to inhibit NF-κB activity and COX2. Methods In this study, HER2-overexpressing SKBr3 breast cancer cells were treated with t10c12 CLA. Protein expression of the HER2 receptor, nuclear NF-κB p65, and total and phosphorylated IκB were examined by western blot and immunofluorescence. PGE2 levels were determined by ELISA. Proliferation was measured by metabolism of 3-(4, 5-Dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide (MTT), and apoptosis was measured by FITC-conjugated Annexin V staining and flow cytometry. Results/Conclusions We observed a significant decrease in HER2 protein expression on western blot following treatment with 40 and 80 µM t10c12 CLA (p<0.01 and 0.001, respectively) and loss of HER2 protein in cells using immunoflourescence that was most pronounced at 80 µM. Protein levels of nuclear NF-κB p65 were also significantly reduced at the 80 µM dose. This was accompanied by a significant decrease in PGE2 levels (p = 0.05). Pretreatment with t10c12 CLA significantly enhanced TNFα-induced apoptosis and the anti-proliferative action of trastuzumab (p = 0.05 and 0.001, respectively). These data add to previous reports of an anti-tumor effect of t10c12 CLA and suggest an effect on the HER2 oncogene that may be through CLA mediated downregulation of COX2-derived PGE2.
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Affiliation(s)
- Margaret Flowers
- Department of Nutritional Sciences, University of Arizona, Tucson, AZ, USA.
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Conjugated Linoleic Acid Decreases MCF-7 Human Breast Cancer Cell Growth and Insulin-Like Growth Factor-1 Receptor Levels. Lipids 2009; 44:449-58. [DOI: 10.1007/s11745-009-3288-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2008] [Accepted: 01/26/2009] [Indexed: 10/21/2022]
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McIntosh FM, Shingfield KJ, Devillard E, Russell WR, Wallace RJ. Mechanism of conjugated linoleic acid and vaccenic acid formation in human faecal suspensions and pure cultures of intestinal bacteria. Microbiology (Reading) 2009; 155:285-294. [DOI: 10.1099/mic.0.022921-0] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Faecal bacteria from four human donors and six species of human intestinal bacteria known to metabolize linoleic acid (LA) were incubated with LA in deuterium oxide-enriched medium to investigate the mechanisms of conjugated linoleic acid (CLA) and vaccenic acid (VA) formation. The main CLA products in faecal suspensions, rumenic acid (cis-9,trans-11-CLA; RA) and trans-9,trans-11-CLA, were labelled at C-13, as were other 9,11 geometric isomers. Traces of trans-10,cis-12-CLA formed were labelled to a much lower extent. In pure culture, Bifidobacterium breve NCFB 2258 formed labelled RA and trans-9,trans-11-CLA, while Butyrivibrio fibrisolvens 16.4, Roseburia hominis A2-183T, Roseburia inulinivorans A2-192T and Ruminococcus obeum-like strain A2-162 converted LA to VA, labelled in a manner indicating that VA was formed via C-13-labelled RA. Propionibacterium freudenreichii subsp. shermanii DSM 4902T, a possible probiotic, formed mainly RA with smaller amounts of trans-10,cis-12-CLA and trans-9,trans-11-CLA, labelled the same as in the mixed microbiota. Ricinoleic acid (12-OH-cis-9-18 : 1) did not form CLA in the mixed microbiota, in contrast to CLA formation described for Lactobacillus plantarum. These results were similar to those reported for the mixed microbiota of the rumen. Thus, although the bacterial genera and species responsible for biohydrogenation in the rumen and the human intestine differ, and a second route of RA formation via a 10-OH-18 : 1 is present in the intestine, the overall labelling patterns of different CLA isomers formation are common to both gut ecosystems. A hydrogen-abstraction enzymic mechanism is proposed that may explain the role of a 10-OH-18 : 1 intermediate in 9,11-CLA formation in pure and mixed cultures.
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Affiliation(s)
- Freda M. McIntosh
- Gut Health Division, Rowett Research Institute, Bucksburn, Aberdeen AB21 9SB, UK
| | | | - Estelle Devillard
- Gut Health Division, Rowett Research Institute, Bucksburn, Aberdeen AB21 9SB, UK
| | - Wendy R. Russell
- Gut Health Division, Rowett Research Institute, Bucksburn, Aberdeen AB21 9SB, UK
| | - R. John Wallace
- Gut Health Division, Rowett Research Institute, Bucksburn, Aberdeen AB21 9SB, UK
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Lee Y, Thompson JT, de Lera AR, Vanden Heuvel JP. Isomer-specific effects of conjugated linoleic acid on gene expression in RAW 264.7. J Nutr Biochem 2008; 20:848-59, 859.e1-5. [PMID: 18993052 DOI: 10.1016/j.jnutbio.2008.07.013] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2007] [Revised: 06/27/2008] [Accepted: 07/29/2008] [Indexed: 11/19/2022]
Abstract
Conjugated linoleic acid (CLA) is a mixture of dietary fatty acids that has various beneficial effects including decreasing cancer, atherosclerosis, diabetes and inflammation in animal models. Some controversy exists on the specific isomers of CLA that are responsible for the benefits observed. This study was conducted to examine how different CLA isomers regulate gene expression in RAW 264.7. A mouse macrophage cell line, RAW 264.7, was treated with five different CLA isomers (9E,11E-, 9Z,11E-, 9Z,11Z-, 10E,12Z- and 11Z,13E-CLA). Gene expression microarrays were performed, and several significantly regulated genes of interest were verified by a real-time polymerase chain reaction (PCR). Examination of the biological functions of various significantly regulated genes by the five CLA isomers showed distinct properties. Isomers 9E,11E-, 9Z,11Z-, 10E,12Z- and 11Z,13E-CLA decreased production of proinflammatory cytokines such as interleukin (IL)-1alpha, IL-1beta and IL-6. Many of CLA's effects are believed to be mediated by the fatty acid receptors such as the peroxisome proliferator-activated receptors (PPAR) and retinoid-X-receptors (RXR). Using PPAR and RXR specific antagonists and coactivator recruitment assays, it was evident that multiple mechanisms were responsible for gene regulation by CLA isomers. Coactivator recruitment by CLA isomers showed their distinct properties as selective receptor modulators for PPARgamma and RXRalpha. These studies demonstrate distinct isomer differences in gene expression by CLA and will have important ramifications for determining the potential therapeutic benefit of these dietary fatty acids in prevention of inflammation-related diseases.
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Affiliation(s)
- Yunkyoung Lee
- Integrative Biosciences, The Huck Institutes of Life Sciences, The Pennsylvania State University, University Park, PA 16802, USA
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43
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N⊘rgaard JV, Baumgard LH, Skau Nielsen T, Theil PK, S⊘rensen MT, Sejrsen K. Mammary cell turnover and expression of lipogenic genes in response to silage induced CLA and diet energy density in lactating cows. ACTA AGR SCAND A-AN 2008. [DOI: 10.1080/09064700802415694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Abstract
We reviewed the literature regarding the effects of conjugated linoleic acid (CLA) preparations enriched in specific isomers, cis9, trans11-CLA (c9, t11-CLA) or trans10, cis12-CLA (t10, c12-CLA), on tumorigenesis in vivo and growth of tumor cell lines in vitro. We also examined the potential mechanisms by which CLA isomers may alter the incidence of cancer. We found no published reports that examined the effects of purified CLA isomers on human cancer in vivo. Incidence of rat mammary tumors induced by methylnitrosourea was decreased by c9, t11-CLA in all studies and by t10, c12-CLA in just a few that included it. Those 2 isomers decreased the incidence of forestomach tumors induced by benzo (a) pyrene in mice. Both isomers reduced breast and forestomach tumorigenesis. The c9, t11-CLA isomer did not affect the development of spontaneous tumors of the intestine or mammary gland, whereas t10, c12-CLA increased development of genetically induced mammary and intestinal tumors. In vitro, t10, c12-CLA inhibited the growth of mammary, colon, colorectal, gastric, prostate, and hepatoma cell lines. These 2 CLA isomers may regulate tumor growth through different mechanisms, because they have markedly different effects on lipid metabolism and regulation of oncogenes. In addition, c9, t11-CLA inhibited the cyclooxygenase-2 pathway and t10, c12-CLA inhibited the lipooxygenase pathway. The t10, c12-CLA isomer induced the expression of apoptotic genes, whereas c9, t11-CLA did not increase apoptosis in most of the studies that assessed it. Several minor isomers including t9, t11-CLA; c11, t13-CLA; c9, c11-CLA; and t7, c11-CLA were more effective than c9, t11-CLA or t10, c12-CLA in inhibiting cell growth in vitro. Additional studies with purified isomers are needed to establish the health benefit and risk ratios of each isomer in humans.
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Affiliation(s)
- Nirvair S Kelley
- Department of Cell Biology and Human Anatomy, School of Medicine, University of California, Davis, CA 95616-8643, USA
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45
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Rosberg-Cody E, Johnson MC, Fitzgerald GF, Ross PR, Stanton C. Heterologous expression of linoleic acid isomerase from Propionibacterium acnes and anti-proliferative activity of recombinant trans-10, cis-12 conjugated linoleic acid. MICROBIOLOGY-SGM 2007; 153:2483-2490. [PMID: 17660413 PMCID: PMC2885616 DOI: 10.1099/mic.0.2006/001966-0] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The linoleic acid isomerase enzyme from Propionibacterium acnes responsible for bioconversion of linoleic acid to trans-10, cis-12 conjugated linoleic acid (t10, c12 CLA) was cloned and overexpressed in Lactococcus lactis and Escherichia coli, resulting in between 30 and 50 % conversion rates of the substrate linoleic acid to t10, c12 CLA. The anti-proliferative activities of the fatty acids produced following isomerization of linoleic acid by L. lactis and E. coli were assessed using the human SW480 colon cancer cell line. Fatty acids generated from both L. lactis and E. coli contained a mixture of linoleic acid and t10, c12 CLA at a ratio of ∼1.35 : 1. Following 5 days of incubation of SW480 cells with 5–20 μg ml−1 (17.8–71.3 μM) of the t10, c12 CLA, there was a significant (P<0.001) reduction in growth of the SW480 cancer cells compared with the linoleic acid control. Cell viability after treatment with the highest concentration (20 μg ml−1) of the t10, c12 CLA was reduced to 7.9 % (L. lactis CLA) and 19.6 % (E. coli CLA), compared with 95.4 % (control linoleic acid) and 31.7 % (pure t10, c12 CLA). In conclusion, this is believed to represent the first report in which recombinant strains are capable of producing CLA with an anti-proliferative potential.
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Affiliation(s)
- Eva Rosberg-Cody
- Teagasc, Moorepark Food Research, Biotechnology Centre, Fermoy, Co. Cork, Ireland
- Microbiology Department, University College Cork, Ireland
| | - Mark C. Johnson
- Teagasc, Moorepark Food Research, Biotechnology Centre, Fermoy, Co. Cork, Ireland
- Alimentary Pharmabiotic Centre, Cork, Ireland
| | - Gerald F. Fitzgerald
- Microbiology Department, University College Cork, Ireland
- Alimentary Pharmabiotic Centre, Cork, Ireland
| | - Paul R. Ross
- Teagasc, Moorepark Food Research, Biotechnology Centre, Fermoy, Co. Cork, Ireland
- Alimentary Pharmabiotic Centre, Cork, Ireland
| | - Catherine Stanton
- Teagasc, Moorepark Food Research, Biotechnology Centre, Fermoy, Co. Cork, Ireland
- Alimentary Pharmabiotic Centre, Cork, Ireland
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Degner SC, Kemp MQ, Hockings JK, Romagnolo DF. Cyclooxygenase-2 Promoter Activation by the Aromatic Hydrocarbon Receptor in Breast Cancer MCF-7 Cells: Repressive Effects of Conjugated Linoleic Acid. Nutr Cancer 2007; 59:248-57. [DOI: 10.1080/01635580701485585] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Murphy EF, Hooiveld GJ, Muller M, Calogero RA, Cashman KD. Conjugated linoleic acid alters global gene expression in human intestinal-like Caco-2 cells in an isomer-specific manner. J Nutr 2007; 137:2359-65. [PMID: 17951470 DOI: 10.1093/jn/137.11.2359] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Conjugated linoleic acid (CLA) exhibits isomer-specific effects on transepithelial calcium (Ca) transport as well as on cell growth in human intestinal-like Caco-2 cells. However, the molecular mechanisms of action are still unclear. Therefore, this study used a transcriptomic approach to help elucidate the molecular mechanisms underlying such isomer-specific effects. Caco-2 cells were treated with 80 micromol/L linoleic acid (control), 80 micromol/L trans-10, cis-12 CLA, or 80 micromol/L cis-9, trans-11 CLA for 12 d. Ca transport was measured radio-isotopically. RNA was isolated from the cells, labeled, and hybridized to the Affymetrix U133 2.0 Plus arrays (n = 3). Data and functional analysis was preformed using Bioconductor. Using a minimum fold-change criterion of 1.6 and a false discovery rate criterion of P-value <or= 0.05, trans-10, cis-12 CLA altered the expression of 918 genes, whereas, cis-9, trans-11 CLA had no effect on gene expression. Gene ontology analysis revealed that trans-10, cis-12 CLA strongly modulated a number of processes inherently related to carcinogenesis, such as cell cycle, cell proliferation, and DNA metabolism. Trans-10, cis-12 CLA, but not cis-9, trans-11 CLA, increased transepithelial Ca transport in Caco-2 cells, which corresponded to changes in molecular mediators of paracellular (including claudin 2 and 4) and transcellular (calbindin D(9)k and vitamin D receptor) Ca transport. This microarray-based study highlighted a number of gene expression patterns of relevance to 2 important intestinal processes (carcinogenesis and Ca transport), which were modulated by trans-10, cis-12 CLA. These may help our mechanistic understanding of the role of CLA in promoting gut function and health.
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Affiliation(s)
- Eileen F Murphy
- Department of Food and Nutritional Sciences, University College, Cork, Ireland
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Guo DD, Moon HS, Arote R, Seo JH, Quan JS, Choi YJ, Cho CS. Enhanced anticancer effect of conjugated linoleic acid by conjugation with Pluronic F127 on MCF-7 breast cancer cells. Cancer Lett 2007; 254:244-54. [PMID: 17482349 DOI: 10.1016/j.canlet.2007.03.007] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2007] [Revised: 03/09/2007] [Accepted: 03/12/2007] [Indexed: 12/31/2022]
Abstract
This study is designed to evaluate whether conjugated linoleic acid-coupled Pluronic F127 (Plu-CLA) enhances anticancer efficacy in MCF-7 breast cancer cells when compared to conjugated linoleic acid (CLA) itself. CLA was simply coupled to Pluronic F127 through ester linkage between carboxyl group of CLA and hydroxyl one of Pluronic at melting state without solvent or catalyst. Plu-CLA significantly enhanced apoptosis with increasing concentration compared with CLA itself. Moreover, it was found that p53, p21, and Bax were up-regulated, whereas Bcl-2 and procaspase 9 were down-regulated with increasing concentration of Plu-CLA. These results were attributed to the sensitization activity of Pluronic F127.
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Affiliation(s)
- Ding-Ding Guo
- School of Agricultural Biotechnology, Seoul National University, Seoul 151-921, South Korea
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49
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Balan KV, Prince J, Han Z, Dimas K, Cladaras M, Wyche JH, Sitaras NM, Pantazis P. Antiproliferative activity and induction of apoptosis in human colon cancer cells treated in vitro with constituents of a product derived from Pistacia lentiscus L. var. chia. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2007; 14:263-72. [PMID: 16713222 DOI: 10.1016/j.phymed.2006.03.009] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
In this report, we demonstrate that a 50% ethanol extract of the plant-derived product, Chios mastic gum (CMG), contains compounds which inhibit proliferation and induce death of HCT116 human colon cancer cells in vitro. CMG-treatment induces cell arrest at G(1), detachment of the cells from the substrate, activation of pro-caspases-8, -9 and -3, and causes several morphological changes typical of apoptosis in cell organelles. These events, furthermore, are time- and dose-dependent, but p53- and p21-independent. Apoptosis induction by CMG is not inhibited in HCT116 cell clones expressing high levels of the anti-apoptotic protein, Bcl-2, or dominant-negative FADD, thereby indicating that CMG induces cell death via a yet-to-be identified pathway, unrelated to the death receptor- and mitochondrion-dependent pathways. The findings presented here suggest that CMG (a) induces an anoikis form of cell death in HCT116 colon cancer cells that includes events associated with caspase-dependent pathways; and (b) might be developed into a chemotherapeutic agent for the treatment of human colon and other cancers.
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Affiliation(s)
- K V Balan
- Department of Biology, University of Miami, Coral Gables, Miami, FL, USA
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50
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Devillard E, McIntosh FM, Duncan SH, Wallace RJ. Metabolism of linoleic acid by human gut bacteria: different routes for biosynthesis of conjugated linoleic acid. J Bacteriol 2007; 189:2566-70. [PMID: 17209019 PMCID: PMC1899373 DOI: 10.1128/jb.01359-06] [Citation(s) in RCA: 178] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A survey of 30 representative strains of human gram-positive intestinal bacteria indicated that Roseburia species were among the most active in metabolizing linoleic acid (cis-9,cis-12-18:2). Different Roseburia spp. formed either vaccenic acid (trans-11-18:1) or a 10-hydroxy-18:1; these compounds are precursors of the health-promoting conjugated linoleic acid cis-9,trans-11-18:2 in human tissues and the intestine, respectively.
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Affiliation(s)
- Estelle Devillard
- Rowett Research Institute, Bucksburn, Aberdeen, AB21 9SB, United Kingdom
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