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do Amaral VSG, Santos SACS, de Andrade PC, Nowatzki J, Júnior NS, de Medeiros LN, Gitirana LB, Pascutti PG, Almeida VH, Monteiro RQ, Kurtenbach E. Pisum sativum Defensin 1 Eradicates Mouse Metastatic Lung Nodules from B16F10 Melanoma Cells. Int J Mol Sci 2020; 21:E2662. [PMID: 32290394 PMCID: PMC7219108 DOI: 10.3390/ijms21082662] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 03/27/2020] [Accepted: 04/01/2020] [Indexed: 11/16/2022] Open
Abstract
Psd1 is a pea plant defensin which can be actively expressed in Pichia pastoris and shows broad antifungal activity. This activity is dependent on fungal membrane glucosylceramide (GlcCer), which is also important for its internalization, nuclear localization, and endoreduplication. Certain cancer cells present a lipid metabolism imbalance resulting in the overexpression of GlcCer in their membrane. In this work, in vitroassays using B16F10 cells showed that labeled fluorescein isothiocyanate FITC-Psd1 internalized into live cultured cells and targeted the nucleus, which underwent fragmentation, exhibiting approximately 60% of cells in the sub-G0/G1 stage. This phenomenon was dependent on GlcCer, and the participation of cyclin-F was suggested. In a murine lung metastatic melanoma model, intravenous injection of Psd1 together with B16F10 cells drastically reduced the number of nodules at concentrations above 0.5 mg/kg. Additionally, the administration of 1 mg/kg Psd1 decreased the number of lung inflammatory cells to near zero without weight loss, unlike animals that received melanoma cells only. It is worth noting that 1 mg/kg Psd1 alone did not provoke inflammation in lung tissue or weight or vital signal losses over 21 days, inferring no whole animal cytotoxicity. These results suggest that Psd1 could be a promising prototype for human lung anti-metastatic melanoma therapy.
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Affiliation(s)
- Virginia Sara Grancieri do Amaral
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brasil; (V.S.G.d.A.); (S.A.C.S.S.); (P.C.d.A.); (J.N.); (N.S.J.); (L.N.d.M.); (P.G.P.)
- Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brasil; (V.H.A.); (R.Q.M.)
| | - Stephanie Alexia Cristina Silva Santos
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brasil; (V.S.G.d.A.); (S.A.C.S.S.); (P.C.d.A.); (J.N.); (N.S.J.); (L.N.d.M.); (P.G.P.)
| | - Paula Cavalcante de Andrade
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brasil; (V.S.G.d.A.); (S.A.C.S.S.); (P.C.d.A.); (J.N.); (N.S.J.); (L.N.d.M.); (P.G.P.)
- Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brasil; (V.H.A.); (R.Q.M.)
| | - Jenifer Nowatzki
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brasil; (V.S.G.d.A.); (S.A.C.S.S.); (P.C.d.A.); (J.N.); (N.S.J.); (L.N.d.M.); (P.G.P.)
- Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brasil; (V.H.A.); (R.Q.M.)
| | - Nilton Silva Júnior
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brasil; (V.S.G.d.A.); (S.A.C.S.S.); (P.C.d.A.); (J.N.); (N.S.J.); (L.N.d.M.); (P.G.P.)
| | - Luciano Neves de Medeiros
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brasil; (V.S.G.d.A.); (S.A.C.S.S.); (P.C.d.A.); (J.N.); (N.S.J.); (L.N.d.M.); (P.G.P.)
| | - Lycia Brito Gitirana
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brasil;
| | - Pedro Geraldo Pascutti
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brasil; (V.S.G.d.A.); (S.A.C.S.S.); (P.C.d.A.); (J.N.); (N.S.J.); (L.N.d.M.); (P.G.P.)
| | - Vitor H. Almeida
- Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brasil; (V.H.A.); (R.Q.M.)
| | - Robson Q. Monteiro
- Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brasil; (V.H.A.); (R.Q.M.)
| | - Eleonora Kurtenbach
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brasil; (V.S.G.d.A.); (S.A.C.S.S.); (P.C.d.A.); (J.N.); (N.S.J.); (L.N.d.M.); (P.G.P.)
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Li X, Liu X, Wang Y, Cao F, Chen Z, Hu Z, Yu B, Feng H, Ba Z, Liu T, Li H, Jiang B, Huang Y, Li L, Wu D. Intervertebral disc degeneration in mice with type II diabetes induced by leptin receptor deficiency. BMC Musculoskelet Disord 2020; 21:77. [PMID: 32024487 PMCID: PMC7003448 DOI: 10.1186/s12891-020-3091-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Accepted: 01/23/2020] [Indexed: 11/10/2022] Open
Abstract
Background The leptin receptor-deficient knockout (db/db) mouse is a well-established model for studying type II diabetes mellitus (T2DM). T2DM is an important risk factor of intervertebral disc degeneration (IVDD). Although the relationship between type I diabetes and IVDD has been reported by many studies, few studies have reported the effects of T2DM on IVDD in db/db mice model. Methods Mice were separated into 3 groups: wild-type (WT), db/db, and IGF-1 groups (leptin receptor-deficient mice were treated with insulin-like growth factor-1 (IGF-1). To observe the effects of T2DM and glucose-lowering treatment on IVDD, IGF-1 injection was used. The IVD phenotype was detected by H&E and safranin O fast green staining among db/db, WT and IGF-1 mice. The levels of blood glucose and weight in mice were also recorded. The changes in the mass of the trabecular bone in the fifth lumbar vertebra were documented by micro-computed tomography (micro-CT). Tunnel assays were used to detect cell apoptosis in each group. Results The weight of the mice were 27.68 ± 1.6 g in WT group, which was less than 57.56 ± 4.8 g in db/db group, and 52.17 ± 3.7 g in IGF-1 injected group (P < 0.05). The blood glucose levels were also significantly higher in the db/db mice group. T2DM caused by leptin receptor knockout showed an association with significantly decreased vertebral bone mass and increased IVDD when compared to WT mice. The db/db mice induced by leptin deletion showed a higher percentage of MMP3 expression as well as cell apoptosis in IVDD mice than WT mice (P < 0.05), while IGF-1 treatment reversed this situation (P < 0.05). Conclusions T2DM induced by leptin receptor knockout led to IVDD by increasing the levels of MMP3 and promoting cell apoptosis. IGF-1 treatment partially rescue the phenotype of IVDD induced by leptin receptor knockout.
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Affiliation(s)
- Xinhua Li
- Department of Spinal Surgery, Shanghai East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai, 200120, China
| | - Xiaoming Liu
- Department of Spinal Surgery, Shanghai East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai, 200120, China.,Department of Orthopedics, Tongren Hospital, Shanghai Jiao Tong University School of Medicine, 1111 XianXia Road, Shanghai, 200336, China
| | - Yiru Wang
- Department of endocrinology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China
| | - Fuming Cao
- Department of endocrinology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, 200120, China
| | - Zhaoxiong Chen
- Department of Spinal Surgery, Shanghai East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai, 200120, China
| | - Zhouyang Hu
- Department of Spinal Surgery, Shanghai East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai, 200120, China
| | - Bin Yu
- Department of Spinal Surgery, Shanghai East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai, 200120, China
| | - Hang Feng
- Department of Spinal Surgery, Shanghai East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai, 200120, China
| | - Zhaoyu Ba
- Department of Spinal Surgery, Shanghai East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai, 200120, China
| | - Tao Liu
- Department of Spinal Surgery, Shanghai East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai, 200120, China
| | - Haoxi Li
- Department of Spinal Surgery, Shanghai East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai, 200120, China
| | - Bei Jiang
- Department of Spinal Surgery, Shanghai East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai, 200120, China
| | - Yufeng Huang
- Department of Spinal Surgery, Shanghai East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai, 200120, China.
| | - Lijun Li
- Department of Spinal Surgery, Shanghai East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai, 200120, China.
| | - Desheng Wu
- Department of Spinal Surgery, Shanghai East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai, 200120, China.
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Shurin MR, Potapovich AI, Tyurina YY, Tourkova IL, Shurin GV, Kagan VE. Recognition of live phosphatidylserine-labeled tumor cells by dendritic cells: a novel approach to immunotherapy of skin cancer. Cancer Res 2009; 69:2487-96. [PMID: 19276376 DOI: 10.1158/0008-5472.can-08-2611] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Dendritic cells (DC) loaded with tumor antigens from apoptotic/necrotic tumor cells are commonly used as vaccines for cancer therapy. However, the use of dead tumor cells may cause both tolerance and immunity, making the effect of vaccination unpredictable. To deliver live tumor "cargoes" into DC, we developed a new approach based on the "labeling" of tumors with a phospholipid "eat-me" signal, phosphatidylserine. Expression of phosphatidylserine on live tumor cells mediated their recognition and endocytosis by DC resulting in the presentation of tumor antigens to antigen-specific T cells. In mice, topical application of phosphatidylserine-containing ointment over melanoma induced tumor-specific CTL, local and systemic antitumor immunity, and inhibited tumor growth. Thus, labeling of tumors with phosphatidylserine is a promising strategy for cancer immunotherapy.
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Affiliation(s)
- Michael R Shurin
- Department of Pathology and Immunology, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA.
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Steinert S, Lee E, Tresset G, Zhang D, Hortsch R, Wetzel R, Hebbar S, Sundram JR, Kesavapany S, Boschke E, Kraut R. A fluorescent glycolipid-binding peptide probe traces cholesterol dependent microdomain-derived trafficking pathways. PLoS One 2008; 3:e2933. [PMID: 18716682 PMCID: PMC2518528 DOI: 10.1371/journal.pone.0002933] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2008] [Accepted: 07/10/2008] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND The uptake and intracellular trafficking of sphingolipids, which self-associate into plasma membrane microdomains, is associated with many pathological conditions, including viral and toxin infection, lipid storage disease, and neurodegenerative disease. However, the means available to label the trafficking pathways of sphingolipids in live cells are extremely limited. In order to address this problem, we have developed an exogenous, non-toxic probe consisting of a 25-amino acid sphingolipid binding domain, the SBD, derived from the amyloid peptide Abeta, and conjugated by a neutral linker with an organic fluorophore. The current work presents the characterization of the sphingolipid binding and live cell trafficking of this novel probe, the SBD peptide. SBD was the name given to a motif originally recognized by Fantini et al in a number of glycolipid-associated proteins, and was proposed to interact with sphingolipids in membrane microdomains. METHODOLOGY/PRINCIPAL FINDINGS In accordance with Fantini's model, optimal SBD binding to membranes depends on the presence of sphingolipids and cholesterol. In synthetic membrane binding assays, SBD interacts preferentially with raft-like lipid mixtures containing sphingomyelin, cholesterol, and complex gangliosides in a pH-dependent manner, but is less glycolipid-specific than Cholera toxin B (CtxB). Using quantitative time-course colocalization in live cells, we show that the uptake and intracellular trafficking route of SBD is unlike that of either the non-raft marker Transferrin or the raft markers CtxB and Flotillin2-GFP. However, SBD traverses an endolysosomal route that partially intersects with raft-associated pathways, with a major portion being diverted at a late time point to rab11-positive recycling endosomes. Trafficking of SBD to acidified compartments is strongly disrupted by cholesterol perturbations, consistent with the regulation of sphingolipid trafficking by cholesterol. CONCLUSIONS/SIGNIFICANCE The current work presents the characterization and trafficking behavior of a novel sphingolipid-binding fluorescent probe, the SBD peptide. We show that SBD binding to membranes is dependent on the presence of cholesterol, sphingomyelin, and complex glycolipids. In addition, SBD targeting through the endolysosomal pathway in neurons is highly sensitive to cholesterol perturbations, making it a potentially useful tool for the analysis of sphingolipid trafficking in disease models that involve changes in cholesterol metabolism and storage.
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Affiliation(s)
- Steffen Steinert
- Institute of Bioengineering and Nanotechnology, A*Star, Singapore, Singapore
| | - Esther Lee
- Institute of Bioengineering and Nanotechnology, A*Star, Singapore, Singapore
| | - Guillaume Tresset
- Institute of Bioengineering and Nanotechnology, A*Star, Singapore, Singapore
| | - Dawei Zhang
- Institute of Bioengineering and Nanotechnology, A*Star, Singapore, Singapore
| | - Ralf Hortsch
- Institute of Bioengineering and Nanotechnology, A*Star, Singapore, Singapore
| | - Richard Wetzel
- Institute of Bioengineering and Nanotechnology, A*Star, Singapore, Singapore
- Institut für Lebensmittel- und Bioverfahrenstechnik, Technische Universitaet Dresden, Dresden, Germany
| | - Sarita Hebbar
- Institute of Bioengineering and Nanotechnology, A*Star, Singapore, Singapore
| | - Jeyapriya Raja Sundram
- Department of Biochemistry, Neurobiology Programme, National University of Singapore, Singapore, Singapore
| | - Sashi Kesavapany
- Department of Biochemistry, Neurobiology Programme, National University of Singapore, Singapore, Singapore
| | - Elke Boschke
- Institut für Lebensmittel- und Bioverfahrenstechnik, Technische Universitaet Dresden, Dresden, Germany
| | - Rachel Kraut
- Institute of Bioengineering and Nanotechnology, A*Star, Singapore, Singapore
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Trombetta A, Maggiora M, Martinasso G, Cotogni P, Canuto RA, Muzio G. Arachidonic and docosahexaenoic acids reduce the growth of A549 human lung-tumor cells increasing lipid peroxidation and PPARs. Chem Biol Interact 2007; 165:239-50. [PMID: 17275799 DOI: 10.1016/j.cbi.2006.12.014] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2006] [Revised: 12/13/2006] [Accepted: 12/13/2006] [Indexed: 11/22/2022]
Abstract
Polyunsaturated fatty acids (PUFAs) play an important role in both induction and prevention of carcinogenic process. It is well known that several types of neoplastic cells show decreased total PUFA content, contributing to their resistance to chemotherapy and lipid peroxidation. In the light of this, human lung cancer A549 cells, with low PUFA content, were exposed to arachidonic or docosahexaenoic acid to investigate the effect of n-6 and n-3 PUFAs on growth and elucidate underlying mechanisms. The bulk of the results showed that both n-6 PUFAs and n-3 PUFAs decrease human lung-tumor cell growth in a concentration-dependent manner, inducing cell death mainly evident at 100microM concentration. The mechanism underlying the antiproliferative effect of n-6 and n-3 PUFAs appeared to be the same, involving changes in fatty acid composition of biomembranes, production of cytostatic aldehydes derived from lipid peroxidation and able to affect DNA-binding activity of AP-1, and induction of PPAR. From these results it may be hypothesized that n-6 PUFAs, like n-3 PUFAs, are able to inhibit tumor growth.
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Affiliation(s)
- Antonella Trombetta
- Dipartimento di Medicina ed Oncologia Sperimentale, University of Turin, Corso Raffaello 30, 10125 Turin, Italy
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Fallani A, Grieco B, Barletta E, Mugnai G, Giorgi G, Salvini L, Ruggieri S. Synthesis of platelet-activating factor (PAF) in transformed cell lines of a different origin. Prostaglandins Other Lipid Mediat 2002; 70:209-26. [PMID: 12428690 DOI: 10.1016/s0090-6980(02)00109-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Interest in the possible involvement of the platelet-activating factor (PAF) in tumor growth and invasiveness has been stimulated by the recognition that PAF influences various biological responses relevant to metastatic diffusion, such as angiogenesis, adhesiveness to endothelia and cellular motility. In the present study, we investigated the extent to which PAF is synthesized by a series of human and murine transformed cell lines of a different histotype. Synthesis of PAF was studied by combining the 14C-acetate incorporation into PAF with the quantitative analysis of PAF performed by a procedure based on gas chromatography-mass spectrometry with a negative ion chemical ionization. In the presence of the Ca2+ ionophore A23187, cultures of human melanoma (Hs294T), fibrosarcoma (HT1080) and colon carcinoma (LS180) cell lines synthesized conspicuous amounts of PAF, comparable to those produced by resident peritoneal macrophages. Substantial quantities of PAF were also synthesized by the murine melanoma (F10-M3 cells). PAF synthesis was rather limited in RSV-transformed Balb/c3T3 (B77-3T3) cells and in one of their high metastatic variants (B77-AA6 cells), although it was more abundant in the latter. We also investigated whether certain cytokines, such as TNFalpha and IFNgamma might induce PAF synthesis in our systems of cell lines which we found to express mRNAs encoding receptors for these cytokines. We observed that PAF synthesis was enhanced in human melanoma and colon carcinoma cell lines and in the murine B77-AA6 cells to levels comparable to those obtained with the Ca2+ ionophore. Synthesis of PAF was not inducible by TNFalpha in murine F10-M3 melanoma cells. IFNgamma also stimulated PAF synthesis in human and murine melanoma lines, and in human LS180 colon carcinoma line, but not in the B77-AA6 cells. PAF synthesis was also inducible by exogenous PAF in the human and murine melanoma lines, and in the human LS180 colon carcinoma line, all of which expressed cell surface PAF receptors. PAF synthesis was not inducible by exogenous PAF in the B77-AA6 cells, which do not express PAF receptors.
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Affiliation(s)
- Anna Fallani
- Department of Experimental Pathology and Oncology, University of Florence, Italy.
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Muzio G, Salvo RA, Trombetta A, Autelli R, Maggiora M, Terreno M, Dianzani MU, Canuto RA. Dose-dependent inhibition of cell proliferation induced by lipid peroxidation products in rat hepatoma cells after enrichment with arachidonic acid. Lipids 1999; 34:705-11. [PMID: 10478928 DOI: 10.1007/s11745-999-0416-2] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Polyunsaturated fatty acids (PUFA) are important constituents of membrane phospholipids, whose levels are decreased in some tumor cells. This deficiency may cause alterations in signal transduction and an interruption of normal cellular events. The enrichment of tumor cells with PUFA may stimulate or inhibit tumor growth, probably depending on the type of PUFA and the cellular concentration of aldehydes derived from restored lipid peroxidation. We examined the effect of several doses of prooxidant on the growth of hepatoma cells with different aldehyde dehydrogenase activities, enriched with arachidonic acid. Two doses of prooxidant were sufficient to reduce growth of hepatoma cells with low aldehyde dehydrogenase activity, whereas three doses were necessary for those with high enzyme activity. In both cases, lipid peroxidation products blocked the cells in the S phase.
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Affiliation(s)
- G Muzio
- Dipartimento di Medicina ed Oncologia Sperimentale, Università di Torino, Italy
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8
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Ruggieri S, Mugnai G, Mannini A, Calorini L, Fallani A, Barletta E, Mannori G, Cecconi O. Lipid characteristics in metastatic cells. Clin Exp Metastasis 1999; 17:271-6. [PMID: 10545012 DOI: 10.1023/a:1006662811948] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Interest in lipid characteristics of metastatic cells was aroused by the consideration that the various lipid components of cell membranes influence a broad spectrum of cell surface biological functions which are involved in different steps of the metastatic cascade. Correlation between invasive properties and characteristics of cell surface components has been appropriately studied in a limited number of metastatic cell systems isolated by in vivo and in vitro procedures. The major findings of this study have been reported in this review. Among membrane lipid components, glycolipids and phospholipids appeared particularly affected in tumor cells which acquired a metastatic phenotype. In fact, the reduction of complex gangliosides typical of transformed cell lines was even more evident in a highly metastatic variant selected from RSV-transformed murine fibroblasts. The reduction of complex gangliosides, mainly GD1a, particularly affected the adhesion sites of this variant. In a fibrosarcoma line, T3 cells, the metastatic properties appeared to be correlated with the content and cell surface expression of Gb3ose, a glycolipid characteristic of this line. Moreover, a particularly high level of ether-linked lipids was found in high metastatic variants isolated from murine melanoma and fibrosarcoma lines, as well as in human mammary carcinomas. The findings considered in this review are discussed for their possible relevance to the invasive properties of metastatic cells.
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Affiliation(s)
- S Ruggieri
- Department of Experimental Pathology and Oncology, University of Florence, Italy
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Madesh M, Benard O, Balasubramanian KA. Glutathione modulates lipid composition of human colon derived HT-29 cells. Int J Biochem Cell Biol 1998; 30:1345-52. [PMID: 9924804 DOI: 10.1016/s1357-2725(98)00097-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Glutathione (GSH) is important in maintaining intracellular thiol status. The present study looked at the effect of GSH depletion on lipid composition of colon-derived HT-29 cells. GSH was depleted in HT-29 cells by incubation either with buthionine-S, R-sulfoximine (BSO) or diethylmaleate (DEM). GSH was restored during early periods of cells growth by supplementation of growth medium with either GSH ester or N-acetyl cysteine (NAC). Lipids were analysed following GSH depletion and supplementation. Among the neutral lipids, an increase in free cholesterol and diacylglycerol and decrease in cholesteryl ester and triacylglycerol were seen in GSH-depleted cells as compared to control cells. There were no detectable free fatty acids either in control or GSH-depleted cells. Among the phospholipids, a decrease in phosphatidylcholine and phosphatidylinositol and an increase in phosphatidylethanolamine were observed. These changes were a completely reversed by supplementation of BSO-treated cells with GSH ester and partially reversed by N-acetyl cysteine. These results suggest that the GSH status of the cell plays an important role in the lipid composition of the cells.
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Affiliation(s)
- M Madesh
- Wellcome Trust Research Laboratory, Department of Gastrointestinal Sciences, Christian Medical College & Hospital, Vellore, India
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Manning R, Fallani A, Ruggieri S. Lipid changes in HL-60 cells on differentiation into macrophages by treatment with a phorbol ester. Lipids 1995; 30:811-5. [PMID: 8577224 DOI: 10.1007/bf02533956] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
We studied changes in lipid composition of human promyelocytic leukemia cells (HL-60) on differentiation to the macrophage/monocytic lineage by treatment with the phorbol ester, 12-O-tetradecanoyl-phorbol-13-acetate. Differentiation was accompanied by: (i) a decrease in the level of phospholipids; (ii) a greater amount of triacylglycerols; (iii) an increase in 1-alk-1'-enyl-2-acyl- and 1-alkyl-2-acyl-sn-glycero-3-phosphoethanolamine and a decrease in 1-alkyl-2-acyl-sn-glycero-3-phosphocholine; and (iv) an increase in the level of arachidonic acid in ethanolamine phospholipids. The increased levels of ether-linked lipids and of arachidonic acid in ethanolamine phospholipids are consistent with an enhanced biosynthesis of platelet-activating factor and eicosanoids, which are particularly important in the macrophage function.
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Affiliation(s)
- R Manning
- Department of Biological Sciences, University of Durham, England
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11
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Fallani A, Mannori G, Ruggieri S. Composition of ether-linked sub-classes of glycerophospholipids in clones with a different metastatic potential isolated from a murine fibrosarcoma line (T3 cells). Int J Cancer 1995; 62:230-2. [PMID: 7622301 DOI: 10.1002/ijc.2910620220] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
An increase of ether-linked sub-classes of choline and ethanolamine glycerophospholipids has been shown in different types of tumor cells, and correlated with some of their specific biological parameters. In the present study, we examined the composition of ether-linked lipids in a series of clones with a different lung-colonizing potential isolated in our laboratory from a highly metastatic fibrosarcoma line (T3 cells). We found good correlation between the metastatic potential of T3 isolates and increased proportions of both alkylacyl and alkenylacyl subclasses in choline glycerophospholipids (CGP). Moreover, propagation of a weakly metastatic T3 clone in tissue culture led to the emergence of a sub-clone which expressed high metastatic potential together with a high level of alkylacyl and alkenylacyl CGP. No differences were found in the alkylacyl and alkenylacyl-ethanolamine glycerophospholipids (EGP) between the strongly and weakly metastatic T3 clones. We discuss the accumulation of alkylacyl and alkenylacyl CGP in metastatic cells for its possible role in metastatic diffusion by generation of platelet-activating factor (PAF).
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Affiliation(s)
- A Fallani
- Institute of General Pathology, University of Florence, Italy
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Khoo DE, Fermor B, Miller J, Wood CB, Apostolov K, Barker W, Williamson RC, Habib NA. Manipulation of body fat composition with sterculic acid can inhibit mammary carcinomas in vivo. Br J Cancer 1991; 63:97-101. [PMID: 1989672 PMCID: PMC1971644 DOI: 10.1038/bjc.1991.20] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Sterculic acid, a delta-9-desaturase inhibitor, administered to rats caused a rise in the stearic:oleic acid ratio of total lipids in peripheral red cells, serum and liver (P less than 0.001). As a reduction in the stearic:oleic acid ratio has been described in cancer cells, we investigated the effect of sterculic acid on tumour growth. Female F344 rats were injected subcutaneously with two different doses of sterculic acid for 4 weeks prior to, and 4 weeks following, implantation of a nitrosomethylurea-induced mammary tumour. Tumour growth was inhibited equally by the two doses of sterculic acid (P less than 0.001). A rise in the stearic:oleic acid ratio of tumours was observed in rats treated for only 16 days with sterculic acid. Manipulation of the tissue stearic:oleic acid ratio inhibits transplanted mammary tumour growth in rats.
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Mannori G, Cecconi O, Mugnai G, Ruggieri S. Role of glycolipids in the metastatic process: characteristics of neutral glycolipids in clones with different metastatic potentials isolated from a murine fibrosarcoma cell line. Int J Cancer 1990; 45:984-8. [PMID: 2248638 DOI: 10.1002/ijc.2910450535] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
We investigated whether metastatic phenotype is associated with a characteristic glycolipid pattern. For this study, we developed a system of variants with different metastatic potentials that we isolated from the highly metastatic T3 murine fibrosarcoma line by culture in 0.3% agar or on plastic. The glycolipid profiles of T3 cells and of their highly metastatic isolates were characterized by a high level of globotriaosylceramide (Gb3ose). On the other hand, Gb3ose was reduced in a weakly metastatic clone isolated from T3 cells. A reduced level of Gb3ose was also found in a weakly metastatic subclone isolated from a highly metastatic T3 clone. Propagation of this subclone led to the emergence of a series of variants which expressed a high metastatic potential together with a high Gb3ose level. We also observed that Gb3ose was 10 times more prevalent on the cell surface in T3 cells than in a weakly metastatic clone. On the whole, these findings indicate that, in our system of metastatic cells, a high Gb3ose level correlates with metastatic phenotype. It is possible that the highly exposed Gb3ose in metastatic cells is relevant to the metastatic process in view of the role played by the unique molecular structure of this glycolipid in other models of cell-to-cell interaction.
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Affiliation(s)
- G Mannori
- Institute of General Pathology, University of Florence, Italy
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Calorini L, Fallani A, Tombaccini D, Barletta E, Mugnai G, Di Renzo MF, Comoglio PM, Ruggieri S. Lipid characteristics of RSV-transformed Balb/c 3T3 cell lines with different spontaneous metastatic potentials. Lipids 1989; 24:685-90. [PMID: 2555644 DOI: 10.1007/bf02535205] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
To determine whether a metastatic phenotype may be correlated with a characteristic lipid pattern, we compared the lipid composition of low metastasizing Balb/c 3T3 cells transformed by the B77 strain of Rous sarcoma virus (B77-3T3 cells) with that of a subclone isolated by growth in 0.6% agar, the B77-AA6 cells, which exhibit a high capacity for spontaneous metastasis. B77-3T3 cells revealed characteristics in their lipid composition common to other systems of transformed cells, i.e., an accumulation of ether-linked lipids, a reduction of the more complex gangliosides, an increase of oleic acid (18:1) and a decrease of arachidonic (20:4) and C22 polyunsaturated fatty acids in phospholipids. High metastatic B77-AA6 cells showed: a) an even more marked decrease of complex gangliosides; b) a more pronounced increase of 18:1 and decrease of 20:4 and 22 polyunsaturated fatty acids in certain phospholipid classes; and c) a higher percentage of alkyl-acyl subfractions in both phosphatidylcholine and phosphatidylethanolamine than B77-3T3 cells. Comparing the data for other systems of metastatic cells with those of lipid studies of spontaneously metastasizing B77-AA6 cell system leads us to conclude that the metastatic phenotype is characterized by a change in ether-linked lipids, rather than in fatty acids.
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Affiliation(s)
- L Calorini
- Istituto di Patologia Generale, Universitá di Firenze, Italia
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