1
|
von Hegedus JH, de Jong AJ, Hoekstra AT, Spronsen E, Zhu W, Cabukusta B, Kwekkeboom JC, Heijink M, Bos E, Berkers CR, Giera MA, Toes REM, Ioan-Facsinay A. Oleic acid enhances proliferation and calcium mobilization of CD3/CD28 activated CD4 + T cells through incorporation into membrane lipids. Eur J Immunol 2024; 54:e2350685. [PMID: 38890809 DOI: 10.1002/eji.202350685] [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: 07/26/2023] [Revised: 05/06/2024] [Accepted: 05/10/2024] [Indexed: 06/20/2024]
Abstract
Unsaturated fatty acids (UFA) are crucial for T-cell effector functions, as they can affect the growth, differentiation, survival, and function of T cells. Nonetheless, the mechanisms by which UFA affects T-cell behavior are ill-defined. Therefore, we analyzed the processing of oleic acid, a prominent UFA abundantly present in blood, adipocytes, and the fat pads surrounding lymph nodes, in CD4+ T cells. We found that exogenous oleic acid increases proliferation and enhances the calcium flux response upon CD3/CD28 activation. By using a variety of techniques, we found that the incorporation of oleic acid into membrane lipids, rather than regulation of cellular metabolism or TCR expression, is essential for its effects on CD4+ T cells. These results provide novel insights into the mechanism through which exogenous oleic acid enhances CD4+ T-cell function.
Collapse
Affiliation(s)
- Johannes Hendrick von Hegedus
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Anja J de Jong
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Anna T Hoekstra
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, The Netherlands
- Division of Endocrinology, Department of Medicine, Leiden University Medical Center, Leiden, The Netherlands
| | - Eric Spronsen
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Wahwah Zhu
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Birol Cabukusta
- Department of Cell and Chemical Biology, Oncode Institute, Leiden University Medical Center, Leiden, The Netherlands
| | - Joanneke C Kwekkeboom
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Marieke Heijink
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, The Netherlands
| | - Erik Bos
- Department of Cell and Chemical Biology, Leiden University Medical Center, Leiden, The Netherlands
| | - Celia R Berkers
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, The Netherlands
| | - Martin A Giera
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, The Netherlands
| | - Rene E M Toes
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| | - Andreea Ioan-Facsinay
- Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
| |
Collapse
|
2
|
Shetake NG, Das SK, Kumar A, Pandey BN. Nano-inducer of ferroptosis for targeted chemotherapy of human triple negative breast carcinoma. BIOMATERIALS ADVANCES 2024; 161:213868. [PMID: 38677038 DOI: 10.1016/j.bioadv.2024.213868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Revised: 04/18/2024] [Accepted: 04/19/2024] [Indexed: 04/29/2024]
Abstract
Triple negative breast carcinoma (TNBC) accounts for 15-20 % of all incident breast cancers (BC) and is known to be highly invasive, has fewer treatment options, and tends to have a worse prognosis. However, due to its biological heterogeneity and diverse clinical and epidemiological behaviors, TNBC lacks a tumor-specific targeted therapy. In the present work we have developed a TNBC-specific targeted nano-delivery agent comprising of a cRGD labeled magneto-liposome (T-LMD) co-encapsulated with oleic acid coated iron oxide nanoparticles (MN-OA) and doxorubicin (Dox) in the liposome bilayer and core, respectively. T-LMD was found to show enhanced uptake and induction of ferroptotic cell death in MDA-MB-231, a TNBC model cell line. Additionally, T-LMD induced ferroptosis was found to be accompanied by release of HMGB1, an immunogenic cell death marker, suggesting its immunogenicity for augmenting the activation of anti-tumor immunity in TNBC. The strategic placement of IONPs in the liposome bilayer of T-LMD facilitates the sensitization of MDA-MB-231 cells to undergo ferroptosis; predominantly via the activation of the iron/lipid metabolism pathway, as validated by use of small molecule ferroptosis inhibitor (ferrostatin-1) and iron chelator (deferoxamine). Activation of ferroptotic cell death was also corroborated by ferroptosis specific-ultrastructural alterations in the shape/size of cellular mitochondria and cell ballooning as observed by transmission electron microscopy and bright field imaging, respectively. Thus, our ferroptosis nano-inducer (T-LMD) can efficiently kill TNBC cells via enhanced LPO and ROS generation leading to membrane damage and consequent release of LDH and HMGB1, induce mitochondrial alterations and enhanced DNA double strand breaks. Altogether, our results suggest significant implications of T-LMD for treatment of TNBC.
Collapse
Affiliation(s)
- Neena G Shetake
- Radiation Biology & Health Sciences Division, Bhabha Atomic Research Centre, Mumbai 400085, India; Homi Bhabha National Institute, Anushakti Nagar, Mumbai 400094, India.
| | - Sourav Kumar Das
- Radiation Biology & Health Sciences Division, Bhabha Atomic Research Centre, Mumbai 400085, India; Homi Bhabha National Institute, Anushakti Nagar, Mumbai 400094, India
| | - Amit Kumar
- Radiation Biology & Health Sciences Division, Bhabha Atomic Research Centre, Mumbai 400085, India; Homi Bhabha National Institute, Anushakti Nagar, Mumbai 400094, India
| | - Badri N Pandey
- Radiation Biology & Health Sciences Division, Bhabha Atomic Research Centre, Mumbai 400085, India; Homi Bhabha National Institute, Anushakti Nagar, Mumbai 400094, India
| |
Collapse
|
3
|
Mackei M, Sebők C, Vöröházi J, Tráj P, Mackei F, Oláh B, Fébel H, Neogrády Z, Mátis G. Detrimental consequences of tebuconazole on redox homeostasis and fatty acid profile of honeybee brain. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2023; 159:103990. [PMID: 37488035 DOI: 10.1016/j.ibmb.2023.103990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 07/17/2023] [Accepted: 07/17/2023] [Indexed: 07/26/2023]
Abstract
Excessive use of azole fungicides in agriculture poses a potential threat to honeybees and other pollinator insects; however, the detailed effects of these molecules remain largely unclear. Hence, in the present study it was aimed to investigate the acute sublethal effects of tebuconazole on the redox homeostasis and fatty acid composition in the brain of honeybees. Our findings demonstrate that tebuconazole decreased total antioxidant capacity, the ratio of reduced to oxidized glutathione and disturbed the function of key antioxidant defense enzymes along with the induction of lipid peroxidation indicated by increased malondialdehyde levels, while it also altered the fatty acid profile of the brain. The present study highlights the negative impact of tebuconazole on honeybees and contributes to the understanding of potential consequences related to azole exposure on pollinator insects' health, such as the occurrence of colony collapse disorder.
Collapse
Affiliation(s)
- Máté Mackei
- Division of Biochemistry, Department of Physiology and Biochemistry, University of Veterinary Medicine Budapest, István Street 2, H-1078 Budapest, Hungary; National Laboratory of Infectious Animal Diseases, Antimicrobial Resistance, Veterinary Public Health and Food Chain Safety, University of Veterinary Medicine Budapest, István Street 2, H-1078, Hungary.
| | - Csilla Sebők
- Division of Biochemistry, Department of Physiology and Biochemistry, University of Veterinary Medicine Budapest, István Street 2, H-1078 Budapest, Hungary
| | - Júlia Vöröházi
- Division of Biochemistry, Department of Physiology and Biochemistry, University of Veterinary Medicine Budapest, István Street 2, H-1078 Budapest, Hungary
| | - Patrik Tráj
- Division of Biochemistry, Department of Physiology and Biochemistry, University of Veterinary Medicine Budapest, István Street 2, H-1078 Budapest, Hungary
| | - Fruzsina Mackei
- Division of Biochemistry, Department of Physiology and Biochemistry, University of Veterinary Medicine Budapest, István Street 2, H-1078 Budapest, Hungary
| | - Barnabás Oláh
- Division of Biochemistry, Department of Physiology and Biochemistry, University of Veterinary Medicine Budapest, István Street 2, H-1078 Budapest, Hungary
| | - Hedvig Fébel
- Nutrition Physiology Research Group, Institute of Physiology and Nutrition, Kaposvár Campus, Hungarian University of Agriculture and Life Sciences, Gesztenyés Street 1, H-2053 Herceghalom, Hungary
| | - Zsuzsanna Neogrády
- Division of Biochemistry, Department of Physiology and Biochemistry, University of Veterinary Medicine Budapest, István Street 2, H-1078 Budapest, Hungary
| | - Gábor Mátis
- Division of Biochemistry, Department of Physiology and Biochemistry, University of Veterinary Medicine Budapest, István Street 2, H-1078 Budapest, Hungary; National Laboratory of Infectious Animal Diseases, Antimicrobial Resistance, Veterinary Public Health and Food Chain Safety, University of Veterinary Medicine Budapest, István Street 2, H-1078, Hungary
| |
Collapse
|
4
|
Shin H, Park S, Hong J, Baek AR, Lee J, Kim DJ, Jang AS, Chin SS, Jeong SH, Park SW. Overexpression of fatty acid synthase attenuates bleomycin induced lung fibrosis by restoring mitochondrial dysfunction in mice. Sci Rep 2023; 13:9044. [PMID: 37270622 DOI: 10.1038/s41598-023-36009-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 05/27/2023] [Indexed: 06/05/2023] Open
Abstract
Proper lipid metabolism is crucial to maintain alveolar epithelial cell (AEC) function, and excessive AEC death plays a role in the pathogenesis of idiopathic pulmonary fibrosis (IPF). The mRNA expression of fatty acid synthase (FASN), a key enzyme in the production of palmitate and other fatty acids, is downregulated in the lungs of IPF patients. However, the precise role of FASN in IPF and its mechanism of action remain unclear. In this study, we showed that FASN expression is significantly reduced in the lungs of IPF patients and bleomycin (BLM)-treated mice. Overexpression of FASN significantly inhibited BLM-induced AEC death, which was significantly potentiated by FASN knockdown. Moreover, FASN overexpression reduced BLM-induced loss of mitochondrial membrane potential and the production of mitochondrial reactive oxygen species (ROS). Oleic acid, a fatty acid component increased by FASN overexpression, inhibited BLM-induced cell death in primary murine AECs and rescue BLM induced mouse lung injury/fibrosis. FASN transgenic mice exposed to BLM exhibited attenuated lung inflammation and collagen deposition compared to controls. Our findings suggest that defects in FASN production may be associated with the pathogenesis of IPF, especially mitochondrial dysfunction, and augmentation of FASN in the lung may have therapeutic potential in preventing lung fibrosis.
Collapse
Affiliation(s)
- Hyesun Shin
- Division of Allergy and Respiratory Medicine, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, 170 Jomaru-ro, Wonmi-gu, Bucheon, 14584, Korea
| | - Shinhee Park
- Division of Allergy and Respiratory Medicine, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, 170 Jomaru-ro, Wonmi-gu, Bucheon, 14584, Korea
| | - Jisu Hong
- Division of Allergy and Respiratory Medicine, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, 170 Jomaru-ro, Wonmi-gu, Bucheon, 14584, Korea
| | - Ae-Rin Baek
- Division of Allergy and Respiratory Medicine, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, 170 Jomaru-ro, Wonmi-gu, Bucheon, 14584, Korea
| | - Junehyuk Lee
- Division of Allergy and Respiratory Medicine, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, 170 Jomaru-ro, Wonmi-gu, Bucheon, 14584, Korea
| | - Do-Jin Kim
- Division of Allergy and Respiratory Medicine, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, 170 Jomaru-ro, Wonmi-gu, Bucheon, 14584, Korea
| | - An-Soo Jang
- Division of Allergy and Respiratory Medicine, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, 170 Jomaru-ro, Wonmi-gu, Bucheon, 14584, Korea
| | - Su Sie Chin
- Department of Pathology, Soonchunhyang University Bucheon Hospital, Bucheon, 14584, Gyeonggi-do, South Korea
| | - Sung Hwan Jeong
- Department of Internal Medicine, Gachon University of Medicine and Science, Gil Medical Center, Incheon, Korea
| | - Sung-Woo Park
- Division of Allergy and Respiratory Medicine, Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, 170 Jomaru-ro, Wonmi-gu, Bucheon, 14584, Korea.
| |
Collapse
|
5
|
Laghezza Masci V, Bernini R, Villanova N, Clemente M, Cicaloni V, Tinti L, Salvini L, Taddei AR, Tiezzi A, Ovidi E. In Vitro Anti-Proliferative and Apoptotic Effects of Hydroxytyrosyl Oleate on SH-SY5Y Human Neuroblastoma Cells. Int J Mol Sci 2022; 23:12348. [PMID: 36293207 PMCID: PMC9604296 DOI: 10.3390/ijms232012348] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 10/11/2022] [Accepted: 10/12/2022] [Indexed: 11/24/2022] Open
Abstract
The antitumor activity of polyphenols derived from extra virgin olive oil and, in particular the biological activity of HTyr, has been studied extensively. However, the use of HTyr as a therapeutic agent for clinical applications is limited by its low bioavailability and rapid excretion in humans. To overcome these limitations, several synthetic strategies have been optimized to prepare lipophenols and new compounds derived from HTyr to increase lipophilicity and bioavailability. One very promising ester is hydroxytyrosyl oleate (HTyr-OL) because the chemical structure of HTyr, which is responsible for several biological activities, is linked to the monounsaturated chain of oleic acid (OA), giving the compound high lipophilicity and thus bioavailability in the cellular environment. In this study, the in vitro cytotoxic, anti-proliferative, and apoptotic induction activities of HTyr-OL were evaluated against SH-SY5Y human neuroblastoma cells, and the effects were compared with those of HTyr and OA. The results showed that the biological activity of HTyr was maintained in HTyr-OL treatments at lower dosages. In addition, the shotgun proteomic approach was used to study HTyr-OL-treated and untreated neuroblastoma cells, revealing that the antioxidant, anti-proliferative and anti-inflammatory activities of HTyr-OL were observed in the unique proteins of the two groups of samples.
Collapse
Affiliation(s)
- Valentina Laghezza Masci
- Department for Innovation in Biological, Agro-Food and Forest Systems (DIBAF), University of Tuscia, Largo dell’Università, 01100 Viterbo, Italy
| | - Roberta Bernini
- Department of Agriculture and Forest Sciences (DAFNE), University of Tuscia, Via San Camillo de Lellis snc, 01100 Viterbo, Italy
| | - Noemi Villanova
- Department of Agriculture and Forest Sciences (DAFNE), University of Tuscia, Via San Camillo de Lellis snc, 01100 Viterbo, Italy
| | - Mariangela Clemente
- Department of Agriculture and Forest Sciences (DAFNE), University of Tuscia, Via San Camillo de Lellis snc, 01100 Viterbo, Italy
| | - Vittoria Cicaloni
- Toscana Life Science Foundation, Via Fiorentina 1, 53100 Siena, Italy
| | - Laura Tinti
- Toscana Life Science Foundation, Via Fiorentina 1, 53100 Siena, Italy
| | - Laura Salvini
- Toscana Life Science Foundation, Via Fiorentina 1, 53100 Siena, Italy
| | - Anna Rita Taddei
- High Equipment Centre, Tuscia University, Largo dell’Università snc, 01100 Viterbo, Italy
| | - Antonio Tiezzi
- Department for Innovation in Biological, Agro-Food and Forest Systems (DIBAF), University of Tuscia, Largo dell’Università, 01100 Viterbo, Italy
| | - Elisa Ovidi
- Department for Innovation in Biological, Agro-Food and Forest Systems (DIBAF), University of Tuscia, Largo dell’Università, 01100 Viterbo, Italy
| |
Collapse
|
6
|
Chetta KE, Newton DA, Wagner CL, Baatz JE. Free Fatty Acid and α-Lactalbumin-Oleic Acid Complexes in Preterm Human Milk Are Cytotoxic to Fetal Intestinal Cells in vitro. Front Nutr 2022; 9:918872. [PMID: 35866080 PMCID: PMC9294382 DOI: 10.3389/fnut.2022.918872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 06/13/2022] [Indexed: 12/04/2022] Open
Abstract
Human milk, the best enteral selection for a preterm infant, becomes altered during freezing and soluble free fatty acid is generated over time. Free fatty acids may form complexes, such as the oleic acid-bound protein called HAMLET (human α-lactalbumin made lethal to tumor cells). We determined the in vitro biological activity of preterm human milk protein-oleic complexes (HAMLET-like complexes) and tested the hypothesis that laboratory-synthesized HAMLET exhibits cytotoxicity in human immature epithelial intestinal cell culture. Thirty-four milk samples from 15 mothers of hospitalized preterm infants were donated over time. Milk fractions were tested repeatedly for FHs 74 Int and HIEC-6 fetal cell cytotoxicity, using a sensitive viability assay. Protein and fatty acid identities were confirmed by Western blot, high performance liquid chromatography, and mass spectrometry. Cytotoxicity of intestinal cells exposed to milk increased respective to milk storage time (p < 0.001) and was associated with free oleic acid (p = 0.009). Synthesized HAMLET was cytotoxic in cultures of both lines. Preterm milk samples killed most cells in culture after an average 54 days in frozen storage (95% C.I. 34–72 days). After prolonged storage time, preterm milk and HAMLET showed a degree of cytotoxicity to immature intestinal cells in culture.
Collapse
|
7
|
Valencia FP, Marino AF, Noutsos C, Poon K. Concentration-dependent change in hypothalamic neuronal transcriptome by the dietary fatty acids: oleic and palmitic acids. J Nutr Biochem 2022; 106:109033. [DOI: 10.1016/j.jnutbio.2022.109033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 12/20/2021] [Accepted: 03/18/2022] [Indexed: 11/30/2022]
|
8
|
Chandramoorthy HC, Dera AA, Al-Hakami A, Eid RA, Patel A, Mahmoud Faris N, Devaraj A, Kumar A, Alshahrani MY, Zaman GS, Rajagopalan P. Glucose and oleic acid mediate cellular alterations in GLP-1-induced insulin-positive differentiating UCBMSCs. J Food Biochem 2022; 46:e14087. [PMID: 35246864 DOI: 10.1111/jfbc.14087] [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: 10/28/2021] [Revised: 12/28/2021] [Accepted: 01/06/2022] [Indexed: 11/30/2022]
Abstract
Coordinated effects of glucose and oleic acid on glucagon-like peptide-1 (GLP-1) mediated differentiation of insulin-positive differentiating umbilical cord mesenchymal stromal cells (dUCBMSCs) was studied using a co-culture of NCI-H716 (GLP-1+) and UCBMSCs (insulin+). The addition of 2.5 mM glucose increased the proliferation of NCI-H716 cells by 30% and induced transformation of UCBMSCs into insulin-secreting cells in 18 days as compared to 22 days in control cells. Oleic acid (25 μM) showed decrease in cell proliferation, autophagy, and apoptosis in NCI-H716 cells while no effect was observed in dUCBMSCs. Prolonged glucose and oleic acid resulted in apoptosis and cell cycle changes in dUCBMSCs after day 18 while higher concentrations resulted in cell death. Additionally, the expression of FAS and ACC mRNA was observed in NCI-H716 and dUCBMSCs post 24-hr addition of glucose and/or oleic acid. Absorption of oleic acid was high in NCI-H716 compared to dUCBMSCs. Taken together, optimal concentrations of glucose and oleic acid could be a key factor in stimulating intrinsic GLP-1, which in turn stimulates differentiating MSCs in a glucose-dependent manner. PRACTICAL APPLICATIONS: The aim of this article was to study whether differentiating or differentiated MSCs after mobilization or post-transplant would require optimal glucose and oleic acid to naturally stimulate intrinsic GLP-1, or otherwise, the high or long-term overload of glucose or oleic acid could result in inhibition of differentiated cells resulting in failure of insulin secretion.
Collapse
Affiliation(s)
- Harish C Chandramoorthy
- Centre for Stem Cell Research, College of Medicine, King Khalid University, Abha, Saudi Arabia.,Department of Microbiology & Clinical Parasitology, College of Medicine, King Khalid University, Abha, Saudi Arabia
| | - Ayed A Dera
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Khalid University, Abha, Saudi Arabia.,Central Research Laboratory, College of Applied Medical Sciences, King Khalid University, Abha, Saudi Arabia
| | - Ahmed Al-Hakami
- Centre for Stem Cell Research, College of Medicine, King Khalid University, Abha, Saudi Arabia.,Department of Microbiology & Clinical Parasitology, College of Medicine, King Khalid University, Abha, Saudi Arabia
| | - Refaat A Eid
- Department of Pathology, College of Medicine, King Khalid University, Abha, Saudi Arabia
| | - Ayyub Patel
- Department of Clinical Biochemistry, College of Medicine, King Khalid University, Abha, Saudi Arabia
| | - Nouraldeen Mahmoud Faris
- Department of Clinical Biochemistry, College of Medicine, King Khalid University, Abha, Saudi Arabia
| | - Anantharam Devaraj
- Centre for Stem Cell Research, College of Medicine, King Khalid University, Abha, Saudi Arabia.,Department of Microbiology & Clinical Parasitology, College of Medicine, King Khalid University, Abha, Saudi Arabia
| | - Ashish Kumar
- Department of Microbiology & Clinical Parasitology, College of Medicine, King Khalid University, Abha, Saudi Arabia
| | - Mohammad Y Alshahrani
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Khalid University, Abha, Saudi Arabia
| | - Gaffar S Zaman
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Khalid University, Abha, Saudi Arabia
| | - Prasanna Rajagopalan
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Khalid University, Abha, Saudi Arabia.,Central Research Laboratory, College of Applied Medical Sciences, King Khalid University, Abha, Saudi Arabia
| |
Collapse
|
9
|
Oleic acid promotes atherosclerosis via multiple pathophysiological mechanisms. JOURNAL OF BIO-X RESEARCH 2021. [DOI: 10.1097/jbr.0000000000000117] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
|
10
|
Xu JX, Fang K, Gao XR, Liu S, Ge JF. Resveratrol Protects SH-SY5Y Cells Against Oleic Acid-Induced Glucolipid Metabolic Dysfunction and Cell Injuries Via the Wnt/β-Catenin Signalling Pathway. Neurochem Res 2021; 46:2936-2947. [PMID: 34260003 DOI: 10.1007/s11064-021-03398-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 07/05/2021] [Accepted: 07/07/2021] [Indexed: 12/23/2022]
Abstract
Resveratrol (RES) is a polyphenol with diverse beneficial biological and pharmacological activities, and our previous results have demonstrated its neuroprotective effects in several metabolic diseases, including non-alcoholic fatty liver disease. The aim of the present study is to investigate the potential effect of RES against oleic acid (OA)-induced cell injuries in SH-SY5Y cells and explore the possible mechanism. Based on the dose- and time-dependent effects of OA on cell proliferation and LDH release, SH-SY5Y cells were challenged with OA and incubated with or without RES (10-5-10-9 mM) or sitagliptin (STG, 10-7 mM). Lipid accumulation, SREBP1 and PPARα protein expression, glucose consumption and IRS1, AKT, ERK phosphorylation under insulin stimulation, and ROS production were detected. The protein expression of brain-derived neurotrophic factor (BDNF), Copine 6, and key molecules in the Wnt/β-catenin signalling pathway were measured via western blot. The expression of Wnt 1 was also measured via immunofluorescence staining. The results showed that RES treatment could alleviate the neurotoxicity induced by OA, as indicated by the increased cell proliferation and the decreased concentration of LDH in the supernatant. The increased lipid deposition and protein expression of SREBP1 and PPARα induced by OA was also reversed by treatment with RES. Moreover, RES could upregulate glucose consumption and the protein expression of phosphorylated IRS1, AKT, ERK and reduced ROS production in OA-induced SH-SY5Y cells. Furthermore, RES treatment reversed the imbalanced protein expression of BDNF, Copine 6, p-β-catenin, and Wnt 1 in SH-SY5Y cells induced by OA and decreased the hyperexpression of p-GSK3β. However, these effects were suppressed by DKK1, which is a specific antagonist of the Wnt signalling pathway. These results suggested that RES has a neuroprotective effect against OA-induced cell injury and dysfunctional glucolipid metabolism, and the mechanism might involve its ability to regulate oxidative stress and insulin resistance via the Wnt/β-catenin signalling pathway.
Collapse
Affiliation(s)
- Jing-Xian Xu
- School of Pharmacy, Anhui Medical University, 81 Mei-Shan Road, Hefei, 230032, Anhui, China.,Anhui Provincial Laboratory of Inflammatory and Immune Disease, Anhui Institute of Innovative Drugs, Hefei, China.,The Key Laboratory of Anti-inflammatory and Immune Medicine, Ministry of Education, Anhui Medical University, Hefei, China
| | - Ke Fang
- School of Pharmacy, Anhui Medical University, 81 Mei-Shan Road, Hefei, 230032, Anhui, China.,Anhui Provincial Laboratory of Inflammatory and Immune Disease, Anhui Institute of Innovative Drugs, Hefei, China.,The Key Laboratory of Anti-inflammatory and Immune Medicine, Ministry of Education, Anhui Medical University, Hefei, China
| | - Xin-Ran Gao
- School of Pharmacy, Anhui Medical University, 81 Mei-Shan Road, Hefei, 230032, Anhui, China.,Anhui Provincial Laboratory of Inflammatory and Immune Disease, Anhui Institute of Innovative Drugs, Hefei, China.,The Key Laboratory of Anti-inflammatory and Immune Medicine, Ministry of Education, Anhui Medical University, Hefei, China
| | - Sen Liu
- School of Pharmacy, Anhui Medical University, 81 Mei-Shan Road, Hefei, 230032, Anhui, China.,Anhui Provincial Laboratory of Inflammatory and Immune Disease, Anhui Institute of Innovative Drugs, Hefei, China.,The Key Laboratory of Anti-inflammatory and Immune Medicine, Ministry of Education, Anhui Medical University, Hefei, China
| | - Jin-Fang Ge
- School of Pharmacy, Anhui Medical University, 81 Mei-Shan Road, Hefei, 230032, Anhui, China. .,Anhui Provincial Laboratory of Inflammatory and Immune Disease, Anhui Institute of Innovative Drugs, Hefei, China. .,The Key Laboratory of Anti-inflammatory and Immune Medicine, Ministry of Education, Anhui Medical University, Hefei, China.
| |
Collapse
|
11
|
Li J, Chu T, Yang M. Oleic acid induces A7r5 cell proliferation and migration associated with increased expression of HGF and p‑p38. Mol Med Rep 2021; 24:484. [PMID: 33907848 PMCID: PMC8127074 DOI: 10.3892/mmr.2021.12123] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 03/10/2021] [Indexed: 12/20/2022] Open
Abstract
The phenotypes and mechanisms underlying the proliferation and migration of vascular smooth muscle cells (VSMCs) induced by oleic acid (OA) are not completely understood. Therefore, the aim of the present study was to further elucidate the effects of OA on the proliferation and migration of VSMCs. Using A7r5 cells, the hepatocyte growth factor (HGF) inhibitor PHA665752 and the p38 MAPK inhibitor SB203580 were utilized, and Cell Counting Kit‑8 (CCK‑8) assays, Transwell assays, flow cytometry, ELISAs, western blotting and reverse transcription‑quantitative PCR (RT‑qPCR) were conducted to assess the effects of OA. CCK‑8 assays indicated that OA promoted (at 5 and 50 µmol/l) or inhibited (at 800 µmol/l) A7r5 cell proliferation in a time‑ and concentration‑dependent manner (P<0.05). Transwell assays revealed that OA also promoted (at 50 µmol/l) or inhibited (at 800 µmol/l) A7r5 cell migration (P<0.05). Moreover, cell‑cycle analysis identified that 50 µmol/l OA reduced the cellular population in the G0/G1 phase and enhanced the cellular population in the S phase (P<0.05), whereas 800 µmol/l OA increased the cell number in the G0/G1 phase and decreased the cell number in the S phase (P<0.05). In addition, OA promoted (at 50 µmol/l) or inhibited (at 800 µmol/l) the expression level of HGF in A7r5 cells, as demonstrated via ELISA, western blotting and RT‑qPCR analyses (P<0.05). It was also found that OA promoted (at 50 µmol/l) or inhibited (at 800 µmol/l) the expression level of phosphorylated (p)‑p38 in A7r5 cells, as indicated by western blotting (P<0.05). Furthermore, the cell proliferation, migration and HGF expression induced by OA (50 µmol/l) were mitigated by treatment with PHA665752 (0.1 µmol/l) (P<0.05), and the cell proliferation, migration and p‑p38 expression induced by OA (50 µmol/l) were mitigated by SB203580 (2 µmol/l) (P<0.05). Thus, the results suggested that OA served a role in the proliferation and migration of VSMCs via HGF and the p38 MAPK pathway. Moreover, the proliferation and migration of VSMCs induced by OA was associated with increased expression levels of HGF and p‑p38. Taken together, OA, HGF and p38 MAPK may be potential therapeutic targets for the treatment of atherosclerosis.
Collapse
Affiliation(s)
- Jingjing Li
- Department of Clinical Medicine, Jishou University School of Medicine, Jishou, Hunan 416000, P.R. China
| | - Ting Chu
- Department of Nursing, Jishou University School of Medicine, Jishou, Hunan 416000, P.R. China
| | - Maosheng Yang
- Laboratory of Disorders Genes and Department of Pharmacology, Jishou University School of Pharmacy, Jishou, Hunan 416000, P.R. China
| |
Collapse
|
12
|
Yamagata K, Uzu E, Yoshigai Y, Kato C, Tagami M. Oleic acid and oleoylethanolamide decrease interferon-γ-induced expression of PD-L1 and induce apoptosis in human lung carcinoma cells. Eur J Pharmacol 2021; 903:174116. [PMID: 33957086 DOI: 10.1016/j.ejphar.2021.174116] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Revised: 04/16/2021] [Accepted: 04/20/2021] [Indexed: 01/10/2023]
Abstract
Inhibition of programmed death-ligand 1 (PD-L1) in cancer cells provides a reasonable avenue to prevent cancer progression. Although oleate is known to exert anti-cancer effects, its PD-L1 inhibitory effects have not been proven. This study investigated the effects of oleic acid and an oleic acid metabolite, oleoylethanolamide (OEA), on PD-L1 expression and biomarkers of tumorigenesis in several cancer cell lines, namely A549, HuH-7, MCF-7, DLD-1, and LoVo cells. Specifically, we analyzed the expression of PD-L1 and several apoptosis-related genes using RT-PCR. Interferon-gamma (IFN-γ)-induced modulation of PD-L1 protein expression was investigated using western blotting. Results indicate that IFN-γ stimulation increased the expression of PD-L1 in the chosen cancer cell lines. The IFN-γ-induced expression of PD-L1 was greater in A549 cells, than in other cancerous cell lines. In A549 cells, oleic acid and OEA decreased IFN-γ-induced expression of PD-L1, Bax, Bcl-2, and caspase 3. Oleic acid and OEA decreased IFN-γ-induced phosphorylation of STAT. These results indicate that oleic acid and OEA inhibit PD-1 expression, and induce apoptosis via STAT phosphorylation. Therefore, oleic acid and OEA may prevent cancer formation through STAT phosphorylation with IFN-γ. These findings provide novel insights into the anti-cancer effects of oleic acid-rich oil, such as olive oil.
Collapse
Affiliation(s)
- Kazuo Yamagata
- Department of Food Bioscience and Biotechnology, College of Bioresource Sciences, Nihon University (NUBS), Fujisawa, Japan.
| | - Erika Uzu
- Department of Food Bioscience and Biotechnology, College of Bioresource Sciences, Nihon University (NUBS), Fujisawa, Japan
| | - Yuri Yoshigai
- Department of Food Bioscience and Biotechnology, College of Bioresource Sciences, Nihon University (NUBS), Fujisawa, Japan
| | - Chihiro Kato
- Department of Food Bioscience and Biotechnology, College of Bioresource Sciences, Nihon University (NUBS), Fujisawa, Japan
| | - Motoki Tagami
- Department of Internal Medicine, Sanraku Hospital, Chiyoda-Ku, Tokyo, Japan
| |
Collapse
|
13
|
Sawyer BT, Qamar L, Yamamoto TM, McMellen A, Watson ZL, Richer JK, Behbakht K, Schlaepfer IR, Bitler BG. Targeting Fatty Acid Oxidation to Promote Anoikis and Inhibit Ovarian Cancer Progression. Mol Cancer Res 2020; 18:1088-1098. [PMID: 32198139 PMCID: PMC7335321 DOI: 10.1158/1541-7786.mcr-19-1057] [Citation(s) in RCA: 82] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 02/10/2020] [Accepted: 03/16/2020] [Indexed: 12/22/2022]
Abstract
Epithelial-derived high-grade serous ovarian cancer (HGSOC) is the deadliest gynecologic malignancy. Roughly 80% of patients are diagnosed with late-stage disease, which is defined by wide-spread cancer dissemination throughout the pelvic and peritoneal cavities. HGSOC dissemination is dependent on tumor cells acquiring the ability to resist anoikis (apoptosis triggered by cell detachment). Epithelial cell detachment from the underlying basement membrane or extracellular matrix leads to cellular stress, including nutrient deprivation. In this report, we examined the contribution of fatty acid oxidation (FAO) in supporting anoikis resistance. We examined expression Carnitine Palmitoyltransferase 1A (CPT1A) in a panel of HGSOC cell lines cultured in adherent and suspension conditions. With CPT1A knockdown cells, we evaluated anoikis by caspase 3/7 activity, cleaved caspase 3 immunofluorescence, flow cytometry, and colony formation. We assessed CPT1A-dependent mitochondrial activity and tested the effect of exogenous oleic acid on anoikis and mitochondrial activity. In a patient-derived xenograft model, we administered etomoxir, an FAO inhibitor, and/or platinum-based chemotherapy. CPT1A is overexpressed in HGSOC, correlates with poor overall survival, and is upregulated in HGSOC cells cultured in suspension. CPT1A knockdown promoted anoikis and reduced viability of cells cultured in suspension. HGSOC cells in suspension culture are dependent on CPT1A for mitochondrial activity. In a patient-derived xenograft model of HGSOC, etomoxir significantly inhibited tumor progression. IMPLICATIONS: Targeting FAO in HGSOC to promote anoikis and attenuate dissemination is a potential approach to promote a more durable antitumor response and improve patient outcomes.
Collapse
Affiliation(s)
- Brandon T Sawyer
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of Colorado School of Medicine, Aurora, Colorado
| | - Lubna Qamar
- Division of Reproductive Sciences, Department of Obstetrics and Gynecology, University of Colorado School of Medicine, Aurora, Colorado
| | - Tomomi M Yamamoto
- Division of Reproductive Sciences, Department of Obstetrics and Gynecology, University of Colorado School of Medicine, Aurora, Colorado
| | - Alexandra McMellen
- Division of Reproductive Sciences, Department of Obstetrics and Gynecology, University of Colorado School of Medicine, Aurora, Colorado
| | - Zachary L Watson
- Division of Reproductive Sciences, Department of Obstetrics and Gynecology, University of Colorado School of Medicine, Aurora, Colorado
| | - Jennifer K Richer
- Department of Pathology, University of Colorado School of Medicine, Aurora, Colorado
| | - Kian Behbakht
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of Colorado School of Medicine, Aurora, Colorado
| | - Isabel R Schlaepfer
- Division of Medical Oncology, Department of Medicine, University of Colorado School of Medicine, Aurora, Colorado.
| | - Benjamin G Bitler
- Division of Gynecologic Oncology, Department of Obstetrics and Gynecology, University of Colorado School of Medicine, Aurora, Colorado.
- Division of Reproductive Sciences, Department of Obstetrics and Gynecology, University of Colorado School of Medicine, Aurora, Colorado
| |
Collapse
|
14
|
El-Fakharany EM, Redwan EM. Protein-lipid complexes: molecular structure, current scenarios and mechanisms of cytotoxicity. RSC Adv 2019; 9:36890-36906. [PMID: 35539089 PMCID: PMC9075609 DOI: 10.1039/c9ra07127j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 10/21/2019] [Indexed: 02/04/2023] Open
Abstract
Some natural proteins can be complexed with oleic acid (OA) to form an active protein-lipid formulation that can induce tumor-selective apoptosis. The first explored protein was human milk α-lactalbumin (α-LA), called HAMLET when composed with OA in antitumor form. Several groups have prepared active protein-lipid complexes using a variety of approaches, all of which depend on target protein destabilization or direct OA-protein incubation to alter pH to acid or alkaline condition. In addition to performing vital roles in inflammatory processes and immune responses, fatty acids can disturb different metabolic pathways and cellular signals. Therefore, the tumoricidal action of these complexes is related to OA rather than the protein that keeps OA in solution and acts as a vehicle for transferring OA molecules to tumor cells. However, other studies have suggested that the antitumor efficacy of these complexes was exerted by both protein and OA together. The potential is not limited to the anti-tumor activity of protein-lipid complexes but extends to other functions such as bactericidal activity. The protein shell enhances the solubility and stability of the bound fatty acid. These protein-lipid complexes are promising candidates for fighting various cancer types and managing bacterial and viral infections.
Collapse
Affiliation(s)
- Esmail M El-Fakharany
- Protein Research Department, Genetic Engineering and Biotechnology Research Institute, City for Scientific Research and Technology Applications (SRTA-City) New Borg EL-Arab 21934 Alexandria Egypt
| | - Elrashdy M Redwan
- Protein Research Department, Genetic Engineering and Biotechnology Research Institute, City for Scientific Research and Technology Applications (SRTA-City) New Borg EL-Arab 21934 Alexandria Egypt
- Department of Biological Sciences, Faculty of Sciences, King Abdulaziz University P. O. Box 80203 Jeddah Saudi Arabia
| |
Collapse
|
15
|
Querobino SM, de Faria NC, Vigato AA, da Silva BGM, Machado IP, Costa MS, Costa FN, de Araujo DR, Alberto-Silva C. Sodium alginate in oil-poloxamer organogels for intravaginal drug delivery: Influence on structural parameters, drug release mechanisms, cytotoxicity and in vitro antifungal activity. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 99:1350-1361. [PMID: 30889669 DOI: 10.1016/j.msec.2019.02.036] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 01/28/2019] [Accepted: 02/12/2019] [Indexed: 12/29/2022]
Abstract
Local administration of antimicrobial agents is the first therapeutic approach for the treatment of Candida albicans infections. The duration of contact of formulations with the vaginal mucosa is critical for therapeutic efficacy. This study describes the development of organogels employing an oil phase composed of oleic acid (OA) and an aqueous phase consisting of the poloxamer PL407, alone or in association with PL188, together with 0.25-1% sodium alginate (SA), in order to obtain an intravaginal drug delivery system capable of modulating the release of voriconazole (VRC). VRC was solubilized in oleic acid homogenized with the PL-SA aqueous phase, at a final concentration of 5 mg/mL. Physicochemical characterization was performed for evaluation of the influence of SA on organogel structural organization, biopharmaceutical properties, pharmacological efficacy, and cytotoxicity, envisaging use of the formulation for the treatment of vaginal candidiasis. The enthalpy variation values showed greater changes in the presence of PL188 and after the incorporation of SA or VRC in the organogels. Rheological analysis showed Tsol-gel values in the ranges 11-39 °C and 27-30 °C for the OA-PL407 and OA-PL407-188 formulations, respectively. Oscillatory analysis of OA-PL407-188 showed that G' was ~20-fold higher than G″, even after submitting the formulation to temperature variation. VRC-OA-PL407 showed fast drug release from 0.5 to 4 h, maintaining total release (~100%) up to 24 h. The incorporation of SA in the organogels enabled modulation of VRC release, with different release percentages for 0.25% SA (~75%), 0.5% SA (~55%), and 1% SA (~35%). The formulation was non-cytotoxic towards HeLa and Vero cell lines. In diffusion tests, it was able to prevent the growth of Candida albicans and Candida krusei. In conclusion, the results suggested that OA-PL407-188-SA organogels could be possible new systems for VRC delivery, with potential for use in future vaginal applications.
Collapse
Affiliation(s)
- Samyr M Querobino
- Universidade do Estado de Minas Gerais - UEMG, Av. Juca Stockler, 1130, Bairro Belo Horizonte, Passos, 37900-106, MG, Brazil; Natural and Human Sciences Center, Federal University of ABC (UFABC), Av. dos Estados, n° 5001, Bloco A, Torre 3, Lab, 503-3 Santo André, SP, Brazil
| | - Naially C de Faria
- Natural and Human Sciences Center, Federal University of ABC (UFABC), Av. dos Estados, n° 5001, Bloco A, Torre 3, Lab, 503-3 Santo André, SP, Brazil
| | - Aryane A Vigato
- Natural and Human Sciences Center, Federal University of ABC (UFABC), Av. dos Estados, n° 5001, Bloco A, Torre 3, Lab, 503-3 Santo André, SP, Brazil
| | - Bruna G M da Silva
- Instituto de Pesquisa e Desenvolvimento - IP&D, Universidade do Vale do Paraíba (UNIVAP), Av. Shishima Hifumi, n° 2911, São José dos Campos, SP, Brazil
| | - Ian P Machado
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, 05508-000, SP, Brazil
| | - Maricilia S Costa
- Instituto de Pesquisa e Desenvolvimento - IP&D, Universidade do Vale do Paraíba (UNIVAP), Av. Shishima Hifumi, n° 2911, São José dos Campos, SP, Brazil
| | - Fanny N Costa
- Natural and Human Sciences Center, Federal University of ABC (UFABC), Av. dos Estados, n° 5001, Bloco A, Torre 3, Lab, 503-3 Santo André, SP, Brazil
| | - Daniele R de Araujo
- Natural and Human Sciences Center, Federal University of ABC (UFABC), Av. dos Estados, n° 5001, Bloco A, Torre 3, Lab, 503-3 Santo André, SP, Brazil.
| | - Carlos Alberto-Silva
- Natural and Human Sciences Center, Federal University of ABC (UFABC), Rua Arcturus, n° 03, Bloco Delta, São Bernardo do Campo 09606-070, SP, Brazil.
| |
Collapse
|
16
|
Wu D, Qiao K, Feng M, Fu Y, Cai J, Deng Y, Tachibana H, Cheng X. Apoptosis of Acanthamoeba castellanii Trophozoites Induced by Oleic Acid. J Eukaryot Microbiol 2017; 65:191-199. [PMID: 28787535 DOI: 10.1111/jeu.12454] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2017] [Revised: 08/02/2017] [Accepted: 08/02/2017] [Indexed: 12/20/2022]
Abstract
Acanthamoeba spp. can be parasitic in certain situations and are responsible for serious human infections, including Acanthamoeba keratitis, granulomatous amoebic encephalitis, and cutaneous acanthamoebiasis. We analyzed the fatty acid composition of Acanthamoeba castellanii trophozoites and tested the inhibitory activity of the main fatty acids, oleic acid and arachidonic acid, in vitro. Oleic acid markedly inhibited the growth of A. castellanii, with trophozoite viability of 57.4% at a concentration of 200 μM. Caspase-3 staining and annexin V assays showed that apoptotic death occurred in A. castellanii trophozoites. Quantitative PCR and dot blot analysis showed increased levels of metacaspase and interleukin-1β converting enzyme, which is also an indication of apoptosis. In contrast, arachidonic acid showed negligible inhibition of growth of A. castellanii trophozoites. Stimulated expression of Atg3, Atg8 and LC3A/B genes and monodansylcadaverine labeling suggested that oleic acid induces apoptosis by triggering autophagy of trophozoites.
Collapse
Affiliation(s)
- Duo Wu
- Department of Medical Microbiology and Parasitology, Fudan University School of Medicine, Shanghai, 200032, China
| | - Ke Qiao
- Department of Medical Microbiology and Parasitology, Fudan University School of Medicine, Shanghai, 200032, China
| | - Meng Feng
- Department of Medical Microbiology and Parasitology, Fudan University School of Medicine, Shanghai, 200032, China
| | - Yongfeng Fu
- Department of Medical Microbiology and Parasitology, Fudan University School of Medicine, Shanghai, 200032, China
| | - Junlong Cai
- Department of Medical Microbiology and Parasitology, Fudan University School of Medicine, Shanghai, 200032, China
| | - Yihong Deng
- Department of Medical Microbiology and Parasitology, Fudan University School of Medicine, Shanghai, 200032, China
| | - Hiroshi Tachibana
- Department of Infectious Diseases, Tokai University School of Medicine, Isehara, Kanagawa, 259-1193, Japan
| | - Xunjia Cheng
- Department of Medical Microbiology and Parasitology, Fudan University School of Medicine, Shanghai, 200032, China
| |
Collapse
|
17
|
Kucukgul A, Erdogan S. Low concentration of oleic acid exacerbates LPS-induced cell death and inflammation in human alveolar epithelial cells. Exp Lung Res 2017; 43:1-7. [DOI: 10.1080/01902148.2016.1267823] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Altug Kucukgul
- Department of Biochemistry, Veterinary Faculty, Mustafa Kemal University, Hatay, Turkey
| | - Suat Erdogan
- Department of Medical Biology, Faculty of Medicine, Trakya University, Edirne, Turkey
| |
Collapse
|
18
|
Ao R, Wang Y, Tong J, Wang BF. Altered microRNA-9 Expression Level is Directly Correlated with Pathogenesis of Nonalcoholic Fatty Liver Disease by Targeting Onecut2 and SIRT1. Med Sci Monit 2016; 22:3804-3819. [PMID: 27756894 PMCID: PMC5074799 DOI: 10.12659/msm.897207] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Background MicroRNA-9 (miR-9) was detected in nonalcoholic fatty liver disease (NAFLD) patients to understand the role of miR-9 in NAFLD development. Material/Methods Between February 2014 and February 2015, 105 cases of NAFLD were recruited and confirmed by liver biopsy pathology, including patients with mild NAFLD (n=58) and moderate-severe NAFLD (n=47); nonalcoholic steatohepatitis (NASH) (n=53) and non-NASH (n=52); and 50 healthy participants were regarded as the healthy control group. MiR-9 expression was measured by qRT-PCR. For in vitro experiments, L-02 normal liver cells were divided into normal control group (cultured with original culture medium), dimethyl sulfoxide (DMSO) group (cultured with DMSO) and oleic acid group (cultured with oleic acid to induce fatty change), and MTT assay was used to measure the effect of different oleic acid concentrations on cell proliferation. Nile red staining was used to detect intracellular accumulation of lipid droplets. Further, synthetic miR-9 mimic and its control and miR-9 inhibitors and its control were independently transfected into L-02 cells. Results MiR-9 levels in the mild NAFLD group and moderate-severe NAFLD group were significantly higher than in the healthy control group (both P<0.05). Mean fluorescence intensity of lipid droplets increased with the duration of induction, and were dramatically higher in oleate-treated L-02 cells; intracellular triglyceride (TG) content was also higher. miR-9 levels significantly increased following oleate induction. Importantly, miR-9 levels were significantly elevated upon miR-9 mimic transfection. Conversely, miR-9 level was lowered with miR-9 inhibitors transfection. Additionally, Onecut2 and SIRT1 were identified as miR-9 targets. Conclusions A positive relationship between miR-9 and steatosis was established with our results that miR-9 mimic transfection decreased intracellular lipid content. Finally, we identified 2 miR-9 targets, Onecut2 and SIRT1, which may be crucial players in NAFLD development.
Collapse
Affiliation(s)
- Ran Ao
- Department of Gastroenterology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning, China (mainland)
| | - Ying Wang
- Department of Gastroenterology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning, China (mainland)
| | - Jing Tong
- Department of Gastroenterology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning, China (mainland)
| | - Bai-Fang Wang
- Department of Gastroenterology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning, China (mainland)
| |
Collapse
|
19
|
Kim C, Ross I, Sprando R, Johnson W, Sahu S, Flynn T, Wiesenfeld P, Collins T, O'Neilll R, Sapienza P. Distribution of androstenedione and its effects on total free fatty acids in pregnant rats. Toxicol Ind Health 2016; 23:65-74. [DOI: 10.1177/0748233707076774] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Androstenedione, an anabolic steroid used to enhance athletic performance, was administered in corn oil by gastric intubation once daily in the morning to nonpregnant female rats at a dose of 5 or 60mg/kg/day, beginning two weeks before mating and continuing through gestation day (GD) 19. On GD 20, the distribution of androstenedione and other steroid metabolites was investigated in the maternal plasma and target organs, including brain and liver. The concentration of estradiol in plasma approached a statistically significant increase after treatment as compared with the controls, whereas the levels of androstenedione, testosterone and progesterone were not significantly different from the controls. In the liver, the concentrations of androstenedione and estradiol only were increased in a dose-related manner. None of these steroids was detectable in the brain. Androstenedione treatment also produced changes in the level of selected free fatty acids (FFAs) in the maternal blood, brain, liver and fetal brain. The concentrations of palmitic acid (16:0) and stearic acid (18:0) in the plasma were not significantly different between the controls and treated rats. However, oleic acid (18:1), linoleic acid (18:2) and docosahexaenoic acid (DHA, 22:6) were 17.94 ± 2.06 μg/ml, 24.23 ± 2.42 μg/ml and 4.08 ± 0.53 μg/ml, respectively, in the controls, and none of these fatty acids was detectable in the treated plasma. On the other hand, palmitic, stearic, oleic, linoleic and DHA were present in both control and treated livers. Among the FFAs in liver, linoleic and DHA were increased 87% and 169%, respectively, over controls. Palmitic, stearic and oleic acids were not significantly affected by the 60 mg/kg treatment. These were present in both control maternal and fetal brains, whereas linoleic acid was found only in fetal brain control. DHA was present only in the control maternal brain (0.02 ± 0.02 μg/mg protein) and fetal brain (0.24 ± 0.15 μg/mg protein). The results indicated that androstenedione exhibits significantly different effects on the FFA composition among target organs during pregnancy.
Collapse
Affiliation(s)
- C.S. Kim
- US FDA, Center for Food Safety and Applied Nutrition, Office of Applied Research and Safety Assessment,
| | - I.A. Ross
- US FDA, Center for Food Safety and Applied Nutrition, Office of Applied Research and Safety Assessment
| | - R.L. Sprando
- US FDA, Center for Food Safety and Applied Nutrition, Office of Applied Research and Safety Assessment
| | - W.D. Johnson
- US FDA, Center for Food Safety and Applied Nutrition, Office of Applied Research and Safety Assessment
| | - S.C. Sahu
- US FDA, Center for Food Safety and Applied Nutrition, Office of Applied Research and Safety Assessment
| | - T.J. Flynn
- US FDA, Center for Food Safety and Applied Nutrition, Office of Applied Research and Safety Assessment
| | - P.L. Wiesenfeld
- US FDA, Center for Food Safety and Applied Nutrition, Office of Applied Research and Safety Assessment
| | - T.F.X. Collins
- US FDA, Center for Food Safety and Applied Nutrition, Office of Applied Research and Safety Assessment
| | - R.K. O'Neilll
- Office of the Scientific Analysis and Support, Laurel, MD 20708, USA
| | - P. Sapienza
- US FDA, Center for Food Safety and Applied Nutrition, Office of Applied Research and Safety Assessment
| |
Collapse
|
20
|
Lam T, Avti PK, Pouliot P, Maafi F, Tardif JC, Rhéaume É, Lesage F, Kakkar A. Fabricating Water Dispersible Superparamagnetic Iron Oxide Nanoparticles for Biomedical Applications through Ligand Exchange and Direct Conjugation. NANOMATERIALS (BASEL, SWITZERLAND) 2016; 6:E100. [PMID: 28335228 PMCID: PMC5302624 DOI: 10.3390/nano6060100] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Revised: 04/29/2016] [Accepted: 05/13/2016] [Indexed: 12/20/2022]
Abstract
Stable superparamagnetic iron oxide nanoparticles (SPIONs), which can be easily dispersed in an aqueous medium and exhibit high magnetic relaxivities, are ideal candidates for biomedical applications including contrast agents for magnetic resonance imaging. We describe a versatile methodology to render water dispersibility to SPIONs using tetraethylene glycol (TEG)-based phosphonate ligands, which are easily introduced onto SPIONs by either a ligand exchange process of surface-anchored oleic-acid (OA) molecules or via direct conjugation. Both protocols confer good colloidal stability to SPIONs at different NaCl concentrations. A detailed characterization of functionalized SPIONs suggests that the ligand exchange method leads to nanoparticles with better magnetic properties but higher toxicity and cell death, than the direct conjugation methodology.
Collapse
Affiliation(s)
- Tina Lam
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC H3A 0B8, Canada.
| | - Pramod K Avti
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC H3A 0B8, Canada.
- Department of Electrical Engineering, École Polytechnique de Montréal, C.P. 6079 succ. Centre-ville, Montreal, QC H3C 3A7, Canada.
- Research Center, Montreal Heart Institute, 5000 Bélanger Street, Montreal, QC H1T 1C8, Canada.
| | - Philippe Pouliot
- Department of Electrical Engineering, École Polytechnique de Montréal, C.P. 6079 succ. Centre-ville, Montreal, QC H3C 3A7, Canada.
- Research Center, Montreal Heart Institute, 5000 Bélanger Street, Montreal, QC H1T 1C8, Canada.
| | - Foued Maafi
- Research Center, Montreal Heart Institute, 5000 Bélanger Street, Montreal, QC H1T 1C8, Canada.
| | - Jean-Claude Tardif
- Research Center, Montreal Heart Institute, 5000 Bélanger Street, Montreal, QC H1T 1C8, Canada.
- Department of Medicine, Université de Montréal, Montreal, QC H3T 1J4, Canada.
| | - Éric Rhéaume
- Research Center, Montreal Heart Institute, 5000 Bélanger Street, Montreal, QC H1T 1C8, Canada.
- Department of Medicine, Université de Montréal, Montreal, QC H3T 1J4, Canada.
| | - Frédéric Lesage
- Department of Electrical Engineering, École Polytechnique de Montréal, C.P. 6079 succ. Centre-ville, Montreal, QC H3C 3A7, Canada.
- Research Center, Montreal Heart Institute, 5000 Bélanger Street, Montreal, QC H1T 1C8, Canada.
| | - Ashok Kakkar
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC H3A 0B8, Canada.
| |
Collapse
|
21
|
Mathur R, Das RP, Ranjan A, Shaha C. Elevated ergosterol protects Leishmania parasites against antimony-generated stress. FASEB J 2015; 29:4201-13. [PMID: 26116701 DOI: 10.1096/fj.15-272757] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Accepted: 06/15/2015] [Indexed: 11/11/2022]
Abstract
Parasite lipids can serve as signaling molecules, important membrane components, energy suppliers, and pathogenesis factors critical for survival. Functional roles of lipid changes in response to drug-generated stress in parasite survival remains unclear. To investigate this, Leishmania donovani parasites, the causative agents of kala-azar, were exposed to the antileishmanial agent potassium antimony tartrate (PAT) (half-maximal inhibitory concentration ∼ 284 µg/ml). Analysis of cell extracts using gas chromatography-mass spectrometry showed significant increases in very long-chain fatty acids (VLCFAs) prior to an increase in ergosterol in PAT-treated parasites as compared with vehicle-treated controls. Ergosterol biosynthesis inhibition during PAT treatment decreased cell viability. VLCFA inhibition with specific inhibitors completely abrogated ergosterol upsurge followed by a reduction in cell viability. Following PAT-induced VLCFA increase, an upsurge in reactive oxygen species (ROS) occurred and inhibition of this ROS with antioxidants abrogated ergosterol increase. Genetically engineered parasites expressing low constitutive ergosterol levels showed more susceptibility to PAT as compared with wild-type control cells but ergosterol supplementation during PAT treatment increased cell viability. In conclusion, we propose that during antimony treatment, the susceptibility of parasites is determined by the levels of cellular ergosterol that are regulated by oxidative stress generated by VLCFAs.
Collapse
Affiliation(s)
- Radhika Mathur
- Cell Death and Differentiation Research Laboratory, National Institute of Immunology, New Delhi, India
| | - Rajeev Patrick Das
- Cell Death and Differentiation Research Laboratory, National Institute of Immunology, New Delhi, India
| | - Archana Ranjan
- Cell Death and Differentiation Research Laboratory, National Institute of Immunology, New Delhi, India
| | - Chandrima Shaha
- Cell Death and Differentiation Research Laboratory, National Institute of Immunology, New Delhi, India
| |
Collapse
|
22
|
Kitaura Y, Inoue K, Kato N, Matsushita N, Shimomura Y. Enhanced oleate uptake and lipotoxicity associated with laurate. FEBS Open Bio 2015; 5:485-91. [PMID: 26106523 PMCID: PMC4475777 DOI: 10.1016/j.fob.2015.05.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Revised: 05/21/2015] [Accepted: 05/26/2015] [Indexed: 12/30/2022] Open
Abstract
Free fatty acids have been reported to induce cell death (lipotoxicity), but the effects depend on the carbon chain length and number of double bonds. Medium-chain saturated fatty acids (MC-SFAs), such as laurate, have less lipotoxicity than long-chain saturated fatty acids (LC-SFAs), such as palmitate. Monounsaturated fatty acids, such as oleate, have also been reported not only to exert cytotoxic effects, but also to reduce the lipotoxicity of LC-SFA. However the interaction between MC-SFA and oleate with respect to cell death is unclear. In this report, we found that lipotoxicity was enhanced by a combination of laurate and oleate relative to either fatty acid alone. The possible mechanisms involved were examined by measuring the production of reactive oxygen species, mitochondrial depolarization, caspase-3 activity, and lipid droplet formation. Although the stress signals and cell death pathways were distinct among different cell types, we found a common phenomenon of enhanced lipid droplet formation in all cells tested. Using fluorescent- or radioisotope-labeled fatty acids, we found that oleate, but not laurate, increased the uptake of fluorescent-labeled fatty acids, and the combinatory effect was more efficient than with oleate alone. We also found that laurate increased oleate uptake, but the effect of oleate on laurate uptake varied among cell types. These results suggest that laurate enhances the influx rate of oleate, the increased intracellular concentration of which not only enhances lipid storage, but also induces cell death by lipotoxic stress responses, which vary according to cell type.
Collapse
Affiliation(s)
- Yasuyuki Kitaura
- Laboratory of Nutritional Biochemistry, Department of Applied Molecular Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Aichi 464-8601, Japan
| | - Kana Inoue
- Laboratory of Nutritional Biochemistry, Department of Applied Molecular Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Aichi 464-8601, Japan
| | - Naoki Kato
- Laboratory of Nutritional Biochemistry, Department of Applied Molecular Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Aichi 464-8601, Japan
| | - Nahomi Matsushita
- Laboratory of Nutritional Biochemistry, Department of Applied Molecular Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Aichi 464-8601, Japan
| | - Yoshiharu Shimomura
- Laboratory of Nutritional Biochemistry, Department of Applied Molecular Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Aichi 464-8601, Japan
| |
Collapse
|
23
|
Chung SY, Mattison CP, Reed S, Wasserman RL, Desormeaux WA. Treatment with oleic acid reduces IgE binding to peanut and cashew allergens. Food Chem 2015; 180:295-300. [PMID: 25766831 DOI: 10.1016/j.foodchem.2015.02.056] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Revised: 01/26/2015] [Accepted: 02/12/2015] [Indexed: 01/03/2023]
Abstract
Oleic acid (OA) is known to bind and change the bioactivities of proteins, such as α-lactalbumin and β-lactoglobulin in vitro. The objective of this study was to determine if OA binds to allergens from a peanut extract or cashew allergen and changes their allergenic properties. Peanut extract or cashew allergen (Ana o 2) was treated with or without 5mM sodium oleate at 70°C for 60 min (T1) or under the same conditions with an additional overnight incubation at 37°C (T2). After treatment, the samples were dialyzed and analyzed by SDS-PAGE and for OA content. IgE binding was evaluated by ELISA and western blot, using a pooled serum or plasma from individuals with peanut or cashew allergies. Results showed that OA at a concentration of 5mM reduced IgE binding to the allergens. Peanut sample T2 exhibited a lower IgE binding and a higher OA content (protein-bound) than T1. Cashew allergen T2 also showed a reduction in IgE binding. We conclude that OA reduces the allergenic properties of peanut extract and cashew allergen by binding to the allergens. Our findings indicate that OA in the form of sodium oleate may be potentially useful as a coating to reduce the allergenic properties of peanut and cashew allergens.
Collapse
Affiliation(s)
- Si-Yin Chung
- USDA-ARS, Southern Regional Research Center, New Orleans, LA, USA.
| | | | - Shawndrika Reed
- USDA-ARS, Southern Regional Research Center, New Orleans, LA, USA
| | - Richard L Wasserman
- Allergy Immunology Research Center of North Texas, Department of Pediatrics, University of Texas Southwestern Medical School, Dallas, TX 75390, USA
| | | |
Collapse
|
24
|
Ruggles KV, Garbarino J, Liu Y, Moon J, Schneider K, Henneberry A, Billheimer J, Millar JS, Marchadier D, Valasek MA, Joblin-Mills A, Gulati S, Munkacsi AB, Repa JJ, Rader D, Sturley SL. A functional, genome-wide evaluation of liposensitive yeast identifies the "ARE2 required for viability" (ARV1) gene product as a major component of eukaryotic fatty acid resistance. J Biol Chem 2013; 289:4417-31. [PMID: 24273168 DOI: 10.1074/jbc.m113.515197] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
The toxic subcellular accumulation of lipids predisposes several human metabolic syndromes, including obesity, type 2 diabetes, and some forms of neurodegeneration. To identify pathways that prevent lipid-induced cell death, we performed a genome-wide fatty acid sensitivity screen in Saccharomyces cerevisiae. We identified 167 yeast mutants as sensitive to 0.5 mm palmitoleate, 45% of which define pathways that were conserved in humans. 63 lesions also impacted the status of the lipid droplet; however, this was not correlated to the degree of fatty acid sensitivity. The most liposensitive yeast strain arose due to deletion of the "ARE2 required for viability" (ARV1) gene, encoding an evolutionarily conserved, potential lipid transporter that localizes to the endoplasmic reticulum membrane. Down-regulation of mammalian ARV1 in MIN6 pancreatic β-cells or HEK293 cells resulted in decreased neutral lipid synthesis, increased fatty acid sensitivity, and lipoapoptosis. Conversely, elevated expression of human ARV1 in HEK293 cells or mouse liver significantly increased triglyceride mass and lipid droplet number. The ARV1-induced hepatic triglyceride accumulation was accompanied by up-regulation of DGAT1, a triglyceride synthesis gene, and the fatty acid transporter, CD36. Furthermore, ARV1 was identified as a transcriptional of the protein peroxisome proliferator-activated receptor α (PPARα), a key regulator of lipid homeostasis whose transcriptional targets include DGAT1 and CD36. These results implicate ARV1 as a protective factor in lipotoxic diseases due to modulation of fatty acid metabolism. In conclusion, a lipotoxicity-based genetic screen in a model microorganism has identified 75 human genes that may play key roles in neutral lipid metabolism and disease.
Collapse
|
25
|
Nemashkalova EL, Kazakov AS, Khasanova LM, Permyakov EA, Permyakov SE. Structural characterization of more potent alternatives to HAMLET, a tumoricidal complex of α-lactalbumin and oleic acid. Biochemistry 2013; 52:6286-99. [PMID: 23947814 DOI: 10.1021/bi400643s] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
HAMLET is a complex of human α-lactalbumin (hLA) with oleic acid (OA) that kills various tumor cells and strains of Streptococcus pneumoniae. More potent protein-OA complexes were previously reported for bovine α-lactalbumin (bLA) and β-lactoglobulin (bLG), and pike parvalbumin (pPA), and here we explore their structural features. The concentration dependencies of the tryptophan fluorescence of hLA, bLA, and bLG complexes with OA reveal their disintegration at protein concentrations below the micromolar level. Chemical cross-linking experiments provide evidence that association with OA shifts the distribution of oligomeric forms of hLA, bLA, bLG, and pPA toward higher-order oligomers. This effect is confirmed for bLA and bLG using the dynamic light scattering method, while pPA is shown to associate with OA vesicles. Like hLA binding, OA binding increases the affinity of bLG for small unilamellar dipalmitoylphosphatidylcholine vesicles, while pPA efficiently binds to the vesicles irrespective of OA binding. The association of OA with bLG and pPA increases their α-helix and cross-β-sheet content and resistance to enzymatic proteolysis, which is indicative of OA-induced protein structuring. The lack of excess heat sorption during melting of bLG and pPA in complex with OA and the presence of a cooperative thermal transition at the level of their secondary structure suggest that the OA-bound forms of bLG and pPA lack a fixed tertiary structure but exhibit a continuous thermal transition. Overall, despite marked differences, the HAMLET-like complexes that were studied exhibit a common feature: a tendency toward protein oligomerization. Because OA-induced oligomerization has been reported for other proteins, this phenomenon is inherent to many proteins.
Collapse
Affiliation(s)
- Ekaterina L Nemashkalova
- Institute for Biological Instrumentation of the Russian Academy of Sciences , Pushchino, Moscow region 142290, Russia
| | | | | | | | | |
Collapse
|
26
|
Kataev AA, Zherelova OM, Grishchenko VM. Effects of oleic acid on ionic channels of plasma membranes of green alga Chara corallina. BIOCHEMISTRY (MOSCOW) SUPPLEMENT SERIES A: MEMBRANE AND CELL BIOLOGY 2013. [DOI: 10.1134/s1990747812030105] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
27
|
The biological activities of protein/oleic acid complexes reside in the fatty acid. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2013; 1834:1125-43. [DOI: 10.1016/j.bbapap.2013.02.041] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2013] [Revised: 02/18/2013] [Accepted: 02/20/2013] [Indexed: 12/12/2022]
|
28
|
Nakamura T, Aizawa T, Kariya R, Okada S, Demura M, Kawano K, Makabe K, Kuwajima K. Molecular mechanisms of the cytotoxicity of human α-lactalbumin made lethal to tumor cells (HAMLET) and other protein-oleic acid complexes. J Biol Chem 2013; 288:14408-14416. [PMID: 23580643 PMCID: PMC3656296 DOI: 10.1074/jbc.m112.437889] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2012] [Revised: 04/10/2013] [Indexed: 01/02/2023] Open
Abstract
Although HAMLET (human α-lactalbumin made lethal to tumor cells), a complex formed by human α-lactalbumin and oleic acid, has a unique apoptotic activity for the selective killing of tumor cells, the molecular mechanisms of expression of the HAMLET activity are not well understood. Therefore, we studied the molecular properties of HAMLET and its goat counterpart, GAMLET (goat α-lactalbumin made lethal to tumor cells), by pulse field gradient NMR and 920-MHz two-dimensional NMR techniques. We also examined the expression of HAMLET-like activities of complexes between oleic acid and other proteins that form a stable molten globule state. We observed that both HAMLET and GAMLET at pH 7.5 were heterogeneous, composed of the native protein, the monomeric molten globule-like state, and the oligomeric species. At pH 2.0 and 50 °C, HAMLET and GAMLET appeared in the monomeric state, and we identified the oleic acid-binding site in the complexes by two-dimensional NMR. Rather surprisingly, the binding site thus identified was markedly different between HAMLET and GAMLET. Furthermore, canine milk lysozyme, apo-myoglobin, and β2-microglobulin all formed the HAMLET-like complex with the anti-tumor activity, when the protein was treated with oleic acid under conditions in which their molten globule states were stable. From these results, we conclude that the protein portion of HAMLET, GAMLET, and the other HAMLET-like protein-oleic acid complexes is not the origin of their cytotoxicity to tumor cells and that the protein portion of these complexes plays a role in the delivery of cytotoxic oleic acid molecules into tumor cells across the cell membrane.
Collapse
Affiliation(s)
- Takashi Nakamura
- Okazaki Institute for Integrative Bioscience and Institute for Molecular Science, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki 444-8787, Japan
| | - Tomoyasu Aizawa
- Faculty of Advanced Life Science, Hokkaido University, Kita-10 Nishi-8, Kita-ku, Sapporo 060-0810, Japan
| | - Ryusho Kariya
- Division of Hematopoiesis, Center for AIDS Research, Kumamoto University, 2-2-1, Honjo, Chuo-ku, Kumamoto 860-0811, Japan
| | - Seiji Okada
- Division of Hematopoiesis, Center for AIDS Research, Kumamoto University, 2-2-1, Honjo, Chuo-ku, Kumamoto 860-0811, Japan
| | - Makoto Demura
- Faculty of Advanced Life Science, Hokkaido University, Kita-10 Nishi-8, Kita-ku, Sapporo 060-0810, Japan
| | - Keiichi Kawano
- Faculty of Advanced Life Science, Hokkaido University, Kita-10 Nishi-8, Kita-ku, Sapporo 060-0810, Japan
| | - Koki Makabe
- Okazaki Institute for Integrative Bioscience and Institute for Molecular Science, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki 444-8787, Japan; Department of Functional Molecular Science, School of Physical Sciences, Graduate University for Advanced Studies (Sokendai), 5-1 Higashiyama, Myodaiji, Okazaki 444-8787, Japan
| | - Kunihiro Kuwajima
- Okazaki Institute for Integrative Bioscience and Institute for Molecular Science, National Institutes of Natural Sciences, 5-1 Higashiyama, Myodaiji, Okazaki 444-8787, Japan; Department of Functional Molecular Science, School of Physical Sciences, Graduate University for Advanced Studies (Sokendai), 5-1 Higashiyama, Myodaiji, Okazaki 444-8787, Japan.
| |
Collapse
|
29
|
Brinkmann CR, Thiel S, Otzen DE. Protein-fatty acid complexes: biochemistry, biophysics and function. FEBS J 2013; 280:1733-49. [DOI: 10.1111/febs.12204] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2012] [Revised: 11/29/2012] [Accepted: 02/12/2013] [Indexed: 02/01/2023]
Affiliation(s)
| | - Steffen Thiel
- Department of Biomedicine, Faculty of Health Sciences; Aarhus University; Denmark
| | - Daniel E. Otzen
- Interdisciplinary Nanoscience Centre (iNANO), Centre for Insoluble Protein Structures (inSPIN), Department of Molecular Biology and Genetics; Aarhus University; Denmark
| |
Collapse
|
30
|
Jadhav NV, Prasad AI, Kumar A, Mishra R, Dhara S, Babu KR, Prajapat CL, Misra NL, Ningthoujam RS, Pandey BN, Vatsa RK. Synthesis of oleic acid functionalized Fe3O4 magnetic nanoparticles and studying their interaction with tumor cells for potential hyperthermia applications. Colloids Surf B Biointerfaces 2013; 108:158-68. [PMID: 23537834 DOI: 10.1016/j.colsurfb.2013.02.035] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2012] [Revised: 02/12/2013] [Accepted: 02/22/2013] [Indexed: 11/19/2022]
Abstract
In the present study, oleic acid (OA) functionalized Fe3O4 magnetic nanoparticles (MN) were synthesized following modified wet method of MN synthesis. The optimum amount of OA required for capping of MN and the amount of bound and unbound/free OA was determined by thermogravimetric analysis (TGA). Further, we have studied the effect of water molecules, associated with MN, on the variation in their induction heating ability under alternating current (AC) magnetic field conditions. We have employed a new approach to achieve dispersion of OA functionalized MN (MN-OA) in aqueous medium using sodium carbonate, which improves their biological applicability. Interactions amongst MN, OA and sodium carbonate were studied by Fourier transform infrared spectroscopy (FT-IR). Intracellular localization of MN-OA was studied in mouse fibrosarcoma cells (WEHI-164) by prussian blue staining and confocal laser scanning microscopy (CLSM) using nile blue A as a fluorescent probe. Results showed MN-OA to be interacting mainly with the cell membrane. Their hyperthermic killing ability was evaluated in WEHI-164 cells by trypan blue method. Cells treated with MN-OA in combination with induction heating showed decreased viability as compared to respective induction heating controls. These results were supported by altered cellular morphology after treatment of MN-OA in combination with induction heating. Further, the magnitude of apoptosis was found to be ~5 folds higher in cells treated with MN-OA in combination with induction heating as compared to untreated control. These results suggest the efficacy of MN-OA in killing of tumor cells by cellular hyperthermia.
Collapse
Affiliation(s)
- Neena V Jadhav
- Radiation Biology and Health Sciences Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Permyakov SE, Knyazeva EL, Khasanova LM, Fadeev RS, Zhadan AP, Roche-Hakansson H, Håkansson AP, Akatov VS, Permyakov EA. Oleic acid is a key cytotoxic component of HAMLET-like complexes. Biol Chem 2013; 393:85-92. [PMID: 22628302 DOI: 10.1515/bc-2011-230] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2011] [Accepted: 11/24/2011] [Indexed: 11/15/2022]
Abstract
HAMLET is a complex of α-lactalbumin (α-LA) with oleic acid (OA) that selectively kills tumor cells and Streptococcus pneumoniae. To assess the contribution of the proteinaceous component to cytotoxicity of HAMLET, OA complexes with proteins structurally and functionally distinct from α-LA were prepared. Similar to HAMLET, the OA complexes with bovine β-lactoglobulin (bLG) and pike parvalbumin (pPA) (bLG-OA-45 and pPA-OA-45, respectively) induced S. pneumoniae D39 cell death. The activation mechanisms of S. pneumoniae death for these complexes were analogous to those for HAMLET, and the cytotoxicity of the complexes increased with OA content in the preparations. The half-maximal inhibitory concentration for HEp-2 cells linearly decreased with rise in OA content in the preparations, and OA concentration in the preparations causing HEp-2 cell death was close to the cytotoxicity of OA alone. Hence, the cytotoxic action of these complexes against HEp-2 cells is induced mostly by OA. Thermal stabilization of bLG upon association with OA implies that cytotoxicity of bLG-OA-45 complex cannot be ascribed to molten globule-like conformation of the protein component. Overall, the proteinaceous component of HAMLET-like complexes studied is not a prerequisite for their activity; the cytotoxicity of these complexes is mostly due to the action of OA.
Collapse
Affiliation(s)
- Sergei E Permyakov
- Institute for Biological Instrumentation, Russian Academy of Sciences, Pushchino, Moscow 142290, Russia.
| | | | | | | | | | | | | | | | | |
Collapse
|
32
|
Ho CS J, Rydstrom A, Manimekalai MSS, Svanborg C, Grüber G. Low resolution solution structure of HAMLET and the importance of its alpha-domains in tumoricidal activity. PLoS One 2012; 7:e53051. [PMID: 23300861 PMCID: PMC3531425 DOI: 10.1371/journal.pone.0053051] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2012] [Accepted: 11/26/2012] [Indexed: 11/18/2022] Open
Abstract
HAMLET (Human Alpha-lactalbumin Made LEthal to Tumor cells) is the first member in a new family of protein-lipid complexes with broad tumoricidal activity. Elucidating the molecular structure and the domains crucial for HAMLET formation is fundamental for understanding its tumoricidal function. Here we present the low-resolution solution structure of the complex of oleic acid bound HAMLET, derived from small angle X-ray scattering data. HAMLET shows a two-domain conformation with a large globular domain and an extended part of about 2.22 nm in length and 1.29 nm width. The structure has been superimposed into the related crystallographic structure of human α-lactalbumin, revealing that the major part of α-lactalbumin accommodates well in the shape of HAMLET. However, the C-terminal residues from L105 to L123 of the crystal structure of the human α-lactalbumin do not fit well into the HAMLET structure, resulting in an extended conformation in HAMLET, proposed to be required to form the tumoricidal active HAMLET complex with oleic acid. Consistent with this low resolution structure, we identified biologically active peptide epitopes in the globular as well as the extended domains of HAMLET. Peptides covering the alpha1 and alpha2 domains of the protein triggered rapid ion fluxes in the presence of sodium oleate and were internalized by tumor cells, causing rapid and sustained changes in cell morphology. The alpha peptide-oleate bound forms also triggered tumor cell death with comparable efficiency as HAMLET. In addition, shorter peptides corresponding to those domains are biologically active. These findings provide novel insights into the structural prerequisites for the dramatic effects of HAMLET on tumor cells.
Collapse
Affiliation(s)
- James Ho CS
- Department of Microbiology, Immunology and Glycobiology (MIG), Institute of Laboratory Medicine, Lund University, Lund, Sweden
| | - Anna Rydstrom
- Department of Microbiology, Immunology and Glycobiology (MIG), Institute of Laboratory Medicine, Lund University, Lund, Sweden
| | | | - Catharina Svanborg
- Department of Microbiology, Immunology and Glycobiology (MIG), Institute of Laboratory Medicine, Lund University, Lund, Sweden
- * E-mail: (CS); (GG)
| | - Gerhard Grüber
- School of Biological Sciences, Nanyang Technological University, Singapore, Republic of Singapore
- * E-mail: (CS); (GG)
| |
Collapse
|
33
|
Ho CS J, Rydström A, Trulsson M, Bålfors J, Storm P, Puthia M, Nadeem A, Svanborg C. HAMLET: functional properties and therapeutic potential. Future Oncol 2012; 8:1301-13. [DOI: 10.2217/fon.12.122] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Human α-lactalbumin made lethal to tumor cells (HAMLET) is the first member in a new family of protein–lipid complexes that kills tumor cells with high selectivity. The protein component of HAMLET is α-lactalbumin, which in its native state acts as a substrate specifier in the lactose synthase complex, thereby defining a function essential for the survival of lactating mammals. In addition, α-lactalbumin acquires tumoricidal activity after partial unfolding and binding to oleic acid. The lipid cofactor serves the dual role as a stabilizer of the altered fold of the protein and a coactivator of specific steps in tumor cell death. HAMLET is broadly tumoricidal, suggesting that the complex identifies conserved death pathways suitable for targeting by novel therapies. Sensitivity to HAMLET is defined by oncogene expression including Ras and c-Myc and by glycolytic enzymes. Cellular targets are located in the cytoplasmic membrane, cytoskeleton, mitochondria, proteasomes, lysosomes and nuclei, and specific signaling pathways are rapidly activated, first by interactions of HAMLET with the cell membrane and subsequently after HAMLET internalization. Therapeutic effects of HAMLET have been demonstrated in human skin papillomas and bladder cancers, and HAMLET limits the progression of human glioblastomas, with no evidence of toxicity for normal brain or bladder tissue. These findings open up new avenues for cancer therapy and the understanding of conserved death responses in tumor cells.
Collapse
Affiliation(s)
- James Ho CS
- Department of Microbiology, Immunology & Glycobiology (MIG), Institute of Laboratory Medicine, Lund University, Sölvegatan 23, S-223 62 Lund, Sweden
| | - Anna Rydström
- Department of Microbiology, Immunology & Glycobiology (MIG), Institute of Laboratory Medicine, Lund University, Sölvegatan 23, S-223 62 Lund, Sweden
| | - Maria Trulsson
- Department of Microbiology, Immunology & Glycobiology (MIG), Institute of Laboratory Medicine, Lund University, Sölvegatan 23, S-223 62 Lund, Sweden
| | - Johannes Bålfors
- Department of Microbiology, Immunology & Glycobiology (MIG), Institute of Laboratory Medicine, Lund University, Sölvegatan 23, S-223 62 Lund, Sweden
| | - Petter Storm
- Department of Microbiology, Immunology & Glycobiology (MIG), Institute of Laboratory Medicine, Lund University, Sölvegatan 23, S-223 62 Lund, Sweden
| | - Manoj Puthia
- Department of Microbiology, Immunology & Glycobiology (MIG), Institute of Laboratory Medicine, Lund University, Sölvegatan 23, S-223 62 Lund, Sweden
| | - Aftab Nadeem
- Department of Microbiology, Immunology & Glycobiology (MIG), Institute of Laboratory Medicine, Lund University, Sölvegatan 23, S-223 62 Lund, Sweden
| | - Catharina Svanborg
- Department of Microbiology, Immunology & Glycobiology (MIG), Institute of Laboratory Medicine, Lund University, Sölvegatan 23, S-223 62 Lund, Sweden
| |
Collapse
|
34
|
Kim CS, Ross IA, Sapienza PP, Hanes DE, Johnson W, Hutter JC. Distribution and pharmacokinetics of double-radiolabeled endotoxin in the rat brain and peripheral organs. Toxicol Ind Health 2012; 30:432-41. [PMID: 22933553 DOI: 10.1177/0748233712458139] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The endotoxin, lipopolysaccharide (LPS), of Salmonella typhimurium was biosynthetically labeled with (3)H and (14)C incorporated into the fatty acyl chains and glucosamine residues, respectively. The radio-labeled LPS was isolated from the bacteria and then injected into Sprague-Dawley rats. The distribution of (14)C and (3)H-LPS in plasma and other organs was determined following intraperitoneal (IP) doses of (14)C and (3)H-LPS (200 μg/kg). Plasma concentrations of both fatty acyl chains and glucosamine residues were biphasic, with a relatively rapid decay followed by a slow decline for 48 h. Similar biphasic results were found in the peripheral organs (kidney and heart) and brain barrier tissues (meninges and choroid plexus). In other brain tissues (brain stem, caudate nucleus, hypothalamus, frontal cortex, cerebellum and hippocampus), the glucosamine residue was biphasic, whereas the fatty acyl chains showed accumulation. Highest concentrations of LPS were found in the plasma, spleen and the liver. In addition, in the liver, sustained elevations of (14)C-glucosamine and (3)H-fatty acyl chains were observed. This indicates LPS accumulation in the liver. By contrast, the spleen showed biphasic decay of glucosamine residues and accumulation of fatty acyl chains. In the brain barrier tissues, peak LPS concentrations were significantly reduced (about 70%) and were further reduced (about 95%) in other brain tissues. The high elevation of LPS in the spleen is considered indicative of an immune response. Our findings highlight the potential significant role of lipid A as shown with the sustained elevation of (3)H-fatty acyl chains in the brain.
Collapse
Affiliation(s)
- Chung S Kim
- Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, Food and Drug Administration, Laurel, MD, USA
| | - Ivan A Ross
- Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, Food and Drug Administration, Laurel, MD, USA
| | - Philip P Sapienza
- Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, Food and Drug Administration, Laurel, MD, USA
| | - Darcy E Hanes
- Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, Food and Drug Administration, Laurel, MD, USA
| | - Widmark Johnson
- Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, Food and Drug Administration, Laurel, MD, USA
| | - Joseph C Hutter
- Office of Device Evaluation, Center for Devices and Radiological Health, Silver Spring, MD, USA
| |
Collapse
|
35
|
Kim J, Park YJ, Jang Y, Kwon YH. AMPK activation inhibits apoptosis and tau hyperphosphorylation mediated by palmitate in SH-SY5Y cells. Brain Res 2011; 1418:42-51. [PMID: 21937027 DOI: 10.1016/j.brainres.2011.08.059] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2011] [Revised: 08/16/2011] [Accepted: 08/23/2011] [Indexed: 11/25/2022]
Abstract
Obesity and diabetes have been shown to be associated with cognitive impairment or early neurodegeneration. However, the cellular mechanisms that link between these two pathologies have not been clarified. In this study, we treated SH-SY5Y human neuroblastoma cells with palmitate and observed its effect on cell apoptosis and tau hyperphosphorylation. Dose- and time-dependent effects of palmitate on apoptosis were observed. Palmitate treatment induced endoplasmic reticulum (ER) stress, determined by the expression of spliced X-box binding protein 1 (XBP-1) mRNA and immunoglobin heavy chain-binding protein (BiP). We also observed increases in c-Jun N-terminal kinase (JNK) activation and tau hyperphosphorylation in response to palmitate. Although palmitate did not impair insulin signaling as shown by the immunoblotting analysis of AKT phosphorylation, it did inactivate AMP-activated protein kinase (AMPK). Activation of AMPK by N(1)-(β-d-Ribofuranosyl)-5-aminoimidazole-4-carboxamide (AICAR), significantly reduced the apoptosis of cells treated with palmitate. AICAR also significantly inhibited ER stress, resulting in reduced tau hyperphosphorylation in cells treated with palmitate. Similarly, A769662, a direct activator of AMPK, also abolished the ER stress-mediated apoptosis and tau hyperphosphorylation. Therefore, these data suggest that palmitate triggers ER stress-mediated lipotoxicity and that AMPK activation inhibits apoptosis and tau hyperphosphorylation mediated by palmitate in SH-SY5Y cells.
Collapse
Affiliation(s)
- Juhae Kim
- Department of Food and Nutrition, Seoul National University, 599 Gwanak-ro, Gwanak-Gu, Seoul, 151-742, Republic of Korea
| | | | | | | |
Collapse
|
36
|
Permyakov SE, Knyazeva EL, Leonteva MV, Fadeev RS, Chekanov AV, Zhadan AP, Håkansson AP, Akatov VS, Permyakov EA. A novel method for preparation of HAMLET-like protein complexes. Biochimie 2011; 93:1495-501. [PMID: 21596091 DOI: 10.1016/j.biochi.2011.05.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2011] [Accepted: 05/04/2011] [Indexed: 02/08/2023]
Abstract
Some natural proteins induce tumor-selective apoptosis. α-Lactalbumin (α-LA), a milk calcium-binding protein, is converted into an antitumor form, called HAMLET/BAMLET, via partial unfolding and association with oleic acid (OA). Besides triggering multiple cell death mechanisms in tumor cells, HAMLET exhibits bactericidal activity against Streptococcus pneumoniae. The existing methods for preparation of active complexes of α-LA with OA employ neutral pH solutions, which greatly limit water solubility of OA. Therefore these methods suffer from low scalability and/or heterogeneity of the resulting α-LA - OA samples. In this study we present a novel method for preparation of α-LA - OA complexes using alkaline conditions that favor aqueous solubility of OA. The unbound OA is removed by precipitation under acidic conditions. The resulting sample, bLA-OA-45, bears 11 OA molecules and exhibits physico-chemical properties similar to those of BAMLET. Cytotoxic activities of bLA-OA-45 against human epidermoid larynx carcinoma and S. pneumoniae D39 cells are close to those of HAMLET. Treatment of S. pneumoniae with bLA-OA-45 or HAMLET induces depolarization and rupture of the membrane. The cells are markedly rescued from death upon pretreatment with an inhibitor of Ca(2+) transport. Hence, the activation mechanisms of S. pneumoniae death are analogous for these two complexes. The developed express method for preparation of active α-LA - OA complex is high-throughput and suited for development of other protein complexes with low-molecular-weight amphiphilic substances possessing valuable cytotoxic properties.
Collapse
Affiliation(s)
- Sergei E Permyakov
- Institute for Biological Instrumentation of the Russian Academy of Sciences, Pushchino, Moscow Region 142290, Russia.
| | | | | | | | | | | | | | | | | |
Collapse
|
37
|
Spolaore B, Pinato O, Canton M, Zambonin M, Polverino de Laureto P, Fontana A. α-Lactalbumin Forms with Oleic Acid a High Molecular Weight Complex Displaying Cytotoxic Activity. Biochemistry 2010; 49:8658-67. [DOI: 10.1021/bi1012832] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
38
|
Chen KC, Chang LS. Notexin upregulates Fas and FasL protein expression of human neuroblastoma SK-N-SH cells through p38 MAPK/ATF-2 and JNK/c-Jun pathways. Toxicon 2009; 55:754-61. [PMID: 19944115 DOI: 10.1016/j.toxicon.2009.11.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2009] [Revised: 10/27/2009] [Accepted: 11/10/2009] [Indexed: 12/21/2022]
Abstract
Notechis scutatus scutatus notexin induced an increase in Fas and FasL protein expression of human neuroblastoma SK-N-SH cells in a dose- and time-dependent manner. Moreover, notexin treatment upregulated transcription of Fas/FasL mRNA. Downregulation of FADD blocked notexin-induced procaspase-8 degradation and cleavage of Bid and rescued viability of notexin-treated cells. Upon exposure to notexin, activation of JNK and p38 MAPK was observed in SK-N-SH cells. Notexin-induced upregulation of Fas and FasL was suppressed by SB202190 (p38 MAPK inhibitor) and S600125 (JNK inhibitor). Downregulation of p38alpha MAPK and JNK1 by siRNA proved that upregulation of Fas/FasL was related to p38alpha MAPK and JNK1 activation. Notexin treatment evoked p38alpha MAPK-mediated ATF-2 phosphorylation and JNK1-mediated c-Jun phosphorylation. Knockdown of c-Jun and ATF-2 by siRNA or overexpression of dominant-negative c-Jun and ATF-2 revealed that both c-Jun and ATF-2 were crucial for Fas/FasL upregulation. Taken together, our data indicate that notexin-induced upregulation of Fas and FasL is triggered by p38 MAPK/ATF-2 and JNK/c-Jun signaling pathways in SK-N-SH cells.
Collapse
Affiliation(s)
- Ku-Chung Chen
- Institute of Biomedical Sciences, National Sun Yat-Sen University-Kaohsiung Medical University Joint Research Center, National Sun Yat-Sen University, Kaohsiung 804, Taiwan
| | | |
Collapse
|
39
|
Behrendt M, Sandros MG, McKinney RA, McDonald K, Przybytkowski E, Tabrizian M, Maysinger D. Imaging and organelle distribution of fluorescent InGaP/ZnS nanoparticles in glial cells. Nanomedicine (Lond) 2009; 4:747-61. [DOI: 10.2217/nnm.09.64] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Aim: To assess the effects of oleic acid treatment on subcellular distribution of indium gallium phosphide–zinc sulfide (InGaP/ZnS) nanoparticles in microglia and astrocytes. Materials & methods: The extent of colocalization between the nanoparticles and organelles was assessed by confocal microscopy, spectrofluorometry and cell sorting. Results: Cell treatment with a common fatty acid (oleic acid) within the range of physiological concentrations markedly enhanced the InGaP/ZnS uptake by microglia and afforded their colocalization within lipid droplets/lysosomes but not with mitochondria. Conclusion: These results suggest that the availability of mono-unsaturated fatty acids, such as oleic acid, in different cells could significantly alter nanoparticle uptake and localization, which can in turn affect the functions of cells and tissues coexposed to nanoparticles.
Collapse
Affiliation(s)
- Maik Behrendt
- Department of Pharmacology & Therapeutics, McGill University, 3655 Promenade Sir-William-Osler, Montreal, Quebec, H3G 1Y6, Canada
- Department of Biomedicine, Institute of Anatomy, University of Basel, CH-4056 Basel, Switzerland
| | - Marinella G Sandros
- Department of Biomedical Engineering, McGill University, 3775 University Street, Montreal, Quebec, H3A 2B4, Canada
| | - R Anne McKinney
- Department of Pharmacology & Therapeutics, McGill University, 3655 Promenade Sir-William-Osler, Montreal, Quebec, H3G 1Y6, Canada
| | - Ken McDonald
- McGill Flow Cytometry Facility, McGill University, 3649 Promenade Sir-William-Osler, Montreal, Quebec, H3G 0B1, Canada
| | - Ewa Przybytkowski
- Department of Pharmacology & Therapeutics, McGill University, 3655 Promenade Sir-William-Osler, Montreal, Quebec, H3G 1Y6, Canada
| | - Maryam Tabrizian
- Department of Biomedical Engineering, McGill University, 3775 University Street, Montreal, Quebec, H3A 2B4, Canada
| | - Dusica Maysinger
- Department of Pharmacology & Therapeutics, McGill University, 3655 Promenade Sir-William-Osler, Montreal, Quebec, H3G 1Y6, Canada
| |
Collapse
|
40
|
Wilhelm K, Darinskas A, Noppe W, Duchardt E, Mok KH, Vukojević V, Schleucher J, Morozova-Roche LA. Protein oligomerization induced by oleic acid at the solid-liquid interface - equine lysozyme cytotoxic complexes. FEBS J 2009; 276:3975-89. [DOI: 10.1111/j.1742-4658.2009.07107.x] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
41
|
Abstract
PURPOSE OF REVIEW To present current perspectives on the mediators and mechanisms of cyto-lipotoxic events and their relevance to human health. RECENT FINDINGS The relatively recent isolation of lipid acyltransferase genes from yeast to mice and humans has resulted in a paradigm shift that now establishes all fatty acids as toxic, albeit in tissue specific patterns and by different mechanisms. Furthermore, the dysregulation of glucose homeostasis in combination with excess fatty acids provides a synergistic effect leading to glucolipotoxicity and cell death. These findings are relevant to the development of disease states associated with the pathogenesis of the metabolic syndrome. SUMMARY In an era when an astounding number of people are diagnosed with metabolic disorders, it is imperative that we understand the consequences of a chronic metabolic surplus. Excessive fat, saturated or otherwise, has to be accommodated. Multiple aspects of this homeostasis are emerging, some of which are described here.
Collapse
Affiliation(s)
- Jeanne Garbarino
- Institute of Human Nutrition, Columbia University Medical Center, New York, New York 10032, USA
| | | |
Collapse
|
42
|
Krieglstein J, Hufnagel B, Dworak M, Schwarz S, Kewitz T, Reinbold M, Klumpp S. Influence of various fatty acids on the activity of protein phosphatase type 2C and apoptosis of endothelial cells and macrophages. Eur J Pharm Sci 2008; 35:397-403. [DOI: 10.1016/j.ejps.2008.08.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2007] [Revised: 08/20/2008] [Accepted: 08/20/2008] [Indexed: 10/21/2022]
|
43
|
Abstract
Nonalcoholic fatty liver disease (NAFLD) is characterized by insulin resistance, which results in elevated serum concentration of free fatty acids (FFAs). Circulating FFAs provide the substrate for triacylglycerol formation in the liver, and may also be directly cytotoxic. Hepatocyte apoptosis is a key histologic feature of NAFLD, and correlates with progressive inflammation and fibrosis. The molecular pathways leading to hepatocyte apoptosis are not fully defined; however, recent studies suggest that FFA-induced apoptosis contributes to the pathogenesis of nonalcoholic steatohepatitis. FFAs directly engage the core apoptotic machinery by activating the proapoptotic protein Bax, in a c-jun N-terminal kinase-dependent manner. FFAs also activate the lysosomal pathway of cell death and regulate death receptor gene expression. The role of ER stress and oxidative stress in the pathogenesis of nonalcoholic steatohepatitis has also been described. Understanding the molecular mediators of liver injury should promote development of mechanism-based therapeutic interventions.
Collapse
Affiliation(s)
- Harmeet Malhi
- Miles and Shirley Fiterman Center for Digestive Diseases, Mayo Clinic, College of Medicine, Rochester, Minnesota
| | - Gregory J. Gores
- Miles and Shirley Fiterman Center for Digestive Diseases, Mayo Clinic, College of Medicine, Rochester, Minnesota
| |
Collapse
|
44
|
McNamara RK, Jandacek R, Rider T, Tso P, Stanford KE, Hahn CG, Richtand NM. Deficits in docosahexaenoic acid and associated elevations in the metabolism of arachidonic acid and saturated fatty acids in the postmortem orbitofrontal cortex of patients with bipolar disorder. Psychiatry Res 2008; 160:285-99. [PMID: 18715653 PMCID: PMC2620106 DOI: 10.1016/j.psychres.2007.08.021] [Citation(s) in RCA: 98] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2007] [Revised: 07/03/2007] [Accepted: 08/29/2007] [Indexed: 12/19/2022]
Abstract
Previous antemortem and postmortem tissue fatty acid composition studies have observed significant deficits in the omega-3 fatty acid docosahexaenoic acid (DHA, 22:6n-3) in red blood cell (RBC) and postmortem cortical membranes of patients with unipolar depression. In the present study, we determined the fatty acid composition of postmortem orbitofrontal cortex (OFC, Brodmann area 10) of patients with bipolar disorder (n=18) and age-matched normal controls (n=19) by gas chromatography. After correction for multiple comparisons, DHA (-24%), arachidonic acid (-14%), and stearic acid (C18:0) (-4.5%) compositions were significantly lower, and cis-vaccenic acid (18:1n-7) (+12.5%) composition significantly higher, in the OFC of bipolar patients relative to normal controls. Based on metabolite:precursor ratios, significant elevations in arachidonic acid, stearic acid, and palmitic acid conversion/metabolism were observed in the OFC of bipolar patients, and were inversely correlated with DHA composition. Deficits in OFC DHA and arachidonic acid composition, and elevations in arachidonic acid metabolism, were numerically (but not significantly) greater in drug-free bipolar patients relative to patients treated with mood-stabilizer or antipsychotic medications. OFC DHA and arachidonic acid deficits were greater in patients plus normal controls with high vs. low alcohol abuse severity. These results add to a growing body of evidence implicating omega-3 fatty acid deficiency as well as the OFC in the pathoaetiology of bipolar disorder.
Collapse
Affiliation(s)
- Robert K McNamara
- Department of Psychiatry, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA.
| | | | | | | | | | | | | |
Collapse
|
45
|
Buratta M, Castigli E, Sciaccaluga M, Pellegrino RM, Spinozzi F, Roberti R, Corazzi L. Loss of cardiolipin in palmitate-treated GL15 glioblastoma cells favors cytochrome c release from mitochondria leading to apoptosis. J Neurochem 2008; 105:1019-31. [DOI: 10.1111/j.1471-4159.2007.05209.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
46
|
Reinbold M, Hufnagel B, Kewitz T, Klumpp S, Krieglstein J. Unsaturated fatty acids liberated from VLDL cause apoptosis in endothelial cells. Mol Nutr Food Res 2008; 52:581-8. [DOI: 10.1002/mnfr.200700321] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
47
|
Natali F, Siculella L, Salvati S, Gnoni GV. Oleic acid is a potent inhibitor of fatty acid and cholesterol synthesis in C6 glioma cells. J Lipid Res 2007; 48:1966-75. [PMID: 17568062 DOI: 10.1194/jlr.m700051-jlr200] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Glial cells play a pivotal role in brain fatty acid metabolism and membrane biogenesis. However, the potential regulation of lipogenesis and cholesterologenesis by fatty acids in glial cells has been barely investigated. Here, we show that physiologically relevant concentrations of various saturated, monounsaturated, and polyunsaturated fatty acids significantly reduce [1-(14)C]acetate incorporation into fatty acids and cholesterol in C6 cells. Oleic acid was the most effective at depressing lipogenesis and cholesterologenesis; a decreased label incorporation into cellular palmitic, stearic, and oleic acids was detected, suggesting that an enzymatic step(s) of de novo fatty acid biosynthesis was affected. To clarify this issue, the activities of acetyl-coenzyme A carboxylase (ACC) and FAS were determined with an in situ digitonin-permeabilized cell assay after incubation of C6 cells with fatty acids. ACC activity was strongly reduced ( approximately 80%) by oleic acid, whereas no significant change in FAS activity was observed. Oleic acid also reduced the activity of 3-hydroxy-3-methylglutaryl coenzyme A reductase (HMGCR). The inhibition of ACC and HMGCR activities is corroborated by the decreases in ACC and HMGCR mRNA abundance and protein levels. The downregulation of ACC and HMGCR activities and expression by oleic acid could contribute to the reduced lipogenesis and cholesterologenesis.
Collapse
Affiliation(s)
- Francesco Natali
- Laboratory of Biochemistry and Molecular Biology, Department of Biological and Environmental Sciences and Technologies, University of Salento, 73100 Lecce, Italy
| | | | | | | |
Collapse
|
48
|
Zhu Y, Hoell P, Ahlemeyer B, Sure U, Bertalanffy H, Krieglstein J. Implication of PTEN in production of reactive oxygen species and neuronal death in in vitro models of stroke and Parkinson's disease. Neurochem Int 2006; 50:507-16. [PMID: 17169462 DOI: 10.1016/j.neuint.2006.10.010] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2006] [Revised: 10/17/2006] [Accepted: 10/25/2006] [Indexed: 11/28/2022]
Abstract
Oxidative stress plays crucial role in the pathogenesis of neurodegenerative diseases. However, the precise mechanism for an increased production of reactive oxygen species (ROS) under pathological conditions is not yet fully understood. We have recently demonstrated an implication of phosphatase and tensin homologue deleted on chromosome 10 (PTEN), a tumor suppressor, in ROS generation and neuronal apoptosis induced by staurosporine. These findings raised further interest whether PTEN functions as a common mediator of oxidative stress in neurodegenerative processes. To address this issue, neural cells were exposed to oxygen-glucose deprivation (OGD) and to the neurotoxin 1-methyl-4-phenylpyridinium iodide (MPP(+)), which mimic cerebral ischemia and Parkinson's disease, respectively. OGD for 4 h followed by 16 h of reoxygenation or incubation with MPP(+) (250 microM) for 48 h induced 33% and 45% neuronal death in rat hippocampal and in human dopaminergic SH-SY5Y neurons, respectively, accompanied by a gradual increase in the intracellular level of ROS. The increase in ROS by OGD and by MPP(+) did not cause oxidative inactivation of PTEN and thus, PTEN remains constitutively active. In support, the protein level of PTEN was not reduced in both cell cultures after challenging with OGD or MPP(+). Importantly, the elevated intracellular ROS levels and the neuronal death caused by OGD or by MPP(+) toxicity were significantly inhibited when PTEN was downregulated by a specific antisense oligonucleotide or by siRNA. Because SOD2 protein level is not altered either by knockdown of PTEN nor by an inhibition of the PI3K/Akt signalling, we suggest that SOD2 do not contribute to the pathomechanism of oxidative stress induced by PTEN or by inhibiting the related Akt signalling. The present study highlights PTEN as a crucial and common mediator of ROS generation and neuronal death and suggests that PTEN could become a potential therapeutic target for interfering with neurodegeneration.
Collapse
Affiliation(s)
- Yuan Zhu
- Institut für Pharmakologie und Toxikologie, Philipps-Universität Marburg, Baldingerstrasse, D-35032 Marburg, Germany.
| | | | | | | | | | | |
Collapse
|
49
|
Schwarz S, Hufnagel B, Dworak M, Klumpp S, Krieglstein J. Protein phosphatase type 2Calpha and 2Cbeta are involved in fatty acid-induced apoptosis of neuronal and endothelial cells. Apoptosis 2006; 11:1111-9. [PMID: 16699958 DOI: 10.1007/s10495-006-6982-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Unsaturated fatty acids with special structural features have been shown to activate serine/threonine protein phosphatase type 2C (PP2C) isoforms alpha and beta at physiological Mg(2+)-concentrations in vitro. These compounds also induce apoptosis in neuronal and endothelial cells. In this study we further analysed this striking correlation and tried to elucidate whether or not there is a causative relationship between activation of PP2C and induction of apoptosis. We employed RNA interference to simultaneously knock down PP2Calpha and PP2Cbeta in SH-SY5Y cells or HUVECs, respectively. This downregulation was transient. Treatment of SH-SY5Y cells or HUVECs with oleic acid (18:1,cis-Delta(9)) caused apoptosis in a time- and concentration-dependent manner. In both cases, cells with reduced PP2C-levels were less susceptible to oleic acid-induced cell damage. In conclusion, our results demonstrate that PP2C activation by unsaturated fatty acids actually causes apoptosis in neuronal and endothelial cells.
Collapse
Affiliation(s)
- Stephanie Schwarz
- Institut für Pharmakologie und Toxikologie, Philipps-Universität, Ketzerbach 63, D-35032 Marburg, Germany
| | | | | | | | | |
Collapse
|
50
|
Culmsee C, Krieglstein J. Mechanisms of neuronal degeneration after ischemic stroke – Emerging targets for novel therapeutic strategies. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.ddmec.2005.11.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
|