Autotaxin protects MCF-7 breast cancer and MDA-MB-435 melanoma cells against Taxol-induced apoptosis

Autotaxin (ATX) promotes cancer cell survival, growth, migration, invasion and metastasis. ATX converts extracellular lysophosphatidylcholine (LPC) into lysophosphatidate (LPA). As these lipids have been reported to affect cell signaling through their own G-protein-coupled receptors, ATX could modif...

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Veröffentlicht in:Oncogene 2009-02, Vol.28 (7), p.1028-1039
Hauptverfasser: Samadi, N, Gaetano, C, Goping, I S, Brindley, D N
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creator Samadi, N
Gaetano, C
Goping, I S
Brindley, D N
description Autotaxin (ATX) promotes cancer cell survival, growth, migration, invasion and metastasis. ATX converts extracellular lysophosphatidylcholine (LPC) into lysophosphatidate (LPA). As these lipids have been reported to affect cell signaling through their own G-protein-coupled receptors, ATX could modify the balance of this signaling. Also, ATX affects cell adhesion independently of its catalytic activity. We investigated the interactions of ATX, LPC and LPA on the apoptotic effects of Taxol, which is commonly used in breast cancer treatment. LPC had no significant effect on Taxol-induced apoptosis in MCF-7 breast cancer cells, which do not secrete significant ATX. Addition of incubation medium from MDA-MB-435 melanoma cells, which secrete ATX, or recombinat ATX enabled LPC to inhibit Taxol-induced apoptosis of MCF-7 cells. Inhibiting ATX activity blocked this protection against apoptosis. We conclude that LPC has no significant effect in protecting MCF-7 cells against Taxol treatment unless it is converted to LPA by ATX. LPA strongly antagonized Taxol-induced apoptosis through stimulating phosphatidylinositol 3-kinase and inhibiting ceramide formation. LPA also partially reversed the Taxol-induced arrest in the G2/M phase of the cell cycle. Our results support the hypothesis that therapeutic inhibition of ATX activity could improve the efficacy of Taxol as a chemotherapeutic agent for cancer treatment.
doi_str_mv 10.1038/onc.2008.442
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ATX converts extracellular lysophosphatidylcholine (LPC) into lysophosphatidate (LPA). As these lipids have been reported to affect cell signaling through their own G-protein-coupled receptors, ATX could modify the balance of this signaling. Also, ATX affects cell adhesion independently of its catalytic activity. We investigated the interactions of ATX, LPC and LPA on the apoptotic effects of Taxol, which is commonly used in breast cancer treatment. LPC had no significant effect on Taxol-induced apoptosis in MCF-7 breast cancer cells, which do not secrete significant ATX. Addition of incubation medium from MDA-MB-435 melanoma cells, which secrete ATX, or recombinat ATX enabled LPC to inhibit Taxol-induced apoptosis of MCF-7 cells. Inhibiting ATX activity blocked this protection against apoptosis. We conclude that LPC has no significant effect in protecting MCF-7 cells against Taxol treatment unless it is converted to LPA by ATX. LPA strongly antagonized Taxol-induced apoptosis through stimulating phosphatidylinositol 3-kinase and inhibiting ceramide formation. LPA also partially reversed the Taxol-induced arrest in the G2/M phase of the cell cycle. 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Action of oncogenes and antioncogenes ; Ceramide ; Ceramides - metabolism ; Dermatology ; Dosage and administration ; Drug therapy ; Enzyme inhibitors ; Fundamental and applied biological sciences. Psychology ; G protein-coupled receptors ; Genetics ; Gynecology. Andrology. Obstetrics ; Health aspects ; Human Genetics ; Humans ; Internal Medicine ; Kinases ; Lipids ; Lysophosphatidylcholine ; Lysophosphatidylcholines - metabolism ; Lysophospholipids - physiology ; Mammary gland diseases ; Medical sciences ; Medicine ; Medicine &amp; Public Health ; Melanoma ; Melanoma - metabolism ; Melanoma - pathology ; Melanoma - prevention &amp; control ; Membrane Potential, Mitochondrial - drug effects ; Metastases ; Molecular and cellular biology ; Multienzyme Complexes - physiology ; Oncology ; original-article ; Paclitaxel ; Paclitaxel - pharmacology ; Phosphodiesterase I - physiology ; Phosphodiesterases ; Phosphoric Diester Hydrolases ; Physiological aspects ; Pyrophosphatases - physiology ; Reverse Transcriptase Polymerase Chain Reaction ; RNA, Messenger - genetics ; RNA, Messenger - metabolism ; Tumors ; Tumors of the skin and soft tissue. 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ATX converts extracellular lysophosphatidylcholine (LPC) into lysophosphatidate (LPA). As these lipids have been reported to affect cell signaling through their own G-protein-coupled receptors, ATX could modify the balance of this signaling. Also, ATX affects cell adhesion independently of its catalytic activity. We investigated the interactions of ATX, LPC and LPA on the apoptotic effects of Taxol, which is commonly used in breast cancer treatment. LPC had no significant effect on Taxol-induced apoptosis in MCF-7 breast cancer cells, which do not secrete significant ATX. Addition of incubation medium from MDA-MB-435 melanoma cells, which secrete ATX, or recombinat ATX enabled LPC to inhibit Taxol-induced apoptosis of MCF-7 cells. Inhibiting ATX activity blocked this protection against apoptosis. We conclude that LPC has no significant effect in protecting MCF-7 cells against Taxol treatment unless it is converted to LPA by ATX. LPA strongly antagonized Taxol-induced apoptosis through stimulating phosphatidylinositol 3-kinase and inhibiting ceramide formation. LPA also partially reversed the Taxol-induced arrest in the G2/M phase of the cell cycle. Our results support the hypothesis that therapeutic inhibition of ATX activity could improve the efficacy of Taxol as a chemotherapeutic agent for cancer treatment.</description><subject>1-Phosphatidylinositol 3-kinase</subject><subject>Apoptosis</subject><subject>Apoptosis - drug effects</subject><subject>Biological and medical sciences</subject><subject>Blotting, Western</subject><subject>Breast cancer</subject><subject>Breast Neoplasms - metabolism</subject><subject>Breast Neoplasms - pathology</subject><subject>Breast Neoplasms - prevention &amp; control</subject><subject>Cancer therapies</subject><subject>Cell adhesion</subject><subject>Cell adhesion &amp; migration</subject><subject>Cell Biology</subject><subject>Cell cycle</subject><subject>Cell Cycle - drug effects</subject><subject>Cell Line, Tumor</subject><subject>Cell migration</subject><subject>Cell physiology</subject><subject>Cell signaling</subject><subject>Cell survival</subject><subject>Cell transformation and carcinogenesis. Action of oncogenes and antioncogenes</subject><subject>Ceramide</subject><subject>Ceramides - metabolism</subject><subject>Dermatology</subject><subject>Dosage and administration</subject><subject>Drug therapy</subject><subject>Enzyme inhibitors</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>G protein-coupled receptors</subject><subject>Genetics</subject><subject>Gynecology. Andrology. Obstetrics</subject><subject>Health aspects</subject><subject>Human Genetics</subject><subject>Humans</subject><subject>Internal Medicine</subject><subject>Kinases</subject><subject>Lipids</subject><subject>Lysophosphatidylcholine</subject><subject>Lysophosphatidylcholines - metabolism</subject><subject>Lysophospholipids - physiology</subject><subject>Mammary gland diseases</subject><subject>Medical sciences</subject><subject>Medicine</subject><subject>Medicine &amp; Public Health</subject><subject>Melanoma</subject><subject>Melanoma - metabolism</subject><subject>Melanoma - pathology</subject><subject>Melanoma - prevention &amp; control</subject><subject>Membrane Potential, Mitochondrial - drug effects</subject><subject>Metastases</subject><subject>Molecular and cellular biology</subject><subject>Multienzyme Complexes - physiology</subject><subject>Oncology</subject><subject>original-article</subject><subject>Paclitaxel</subject><subject>Paclitaxel - pharmacology</subject><subject>Phosphodiesterase I - physiology</subject><subject>Phosphodiesterases</subject><subject>Phosphoric Diester Hydrolases</subject><subject>Physiological aspects</subject><subject>Pyrophosphatases - physiology</subject><subject>Reverse Transcriptase Polymerase Chain Reaction</subject><subject>RNA, Messenger - genetics</subject><subject>RNA, Messenger - metabolism</subject><subject>Tumors</subject><subject>Tumors of the skin and soft tissue. 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subjects 1-Phosphatidylinositol 3-kinase
Apoptosis
Apoptosis - drug effects
Biological and medical sciences
Blotting, Western
Breast cancer
Breast Neoplasms - metabolism
Breast Neoplasms - pathology
Breast Neoplasms - prevention & control
Cancer therapies
Cell adhesion
Cell adhesion & migration
Cell Biology
Cell cycle
Cell Cycle - drug effects
Cell Line, Tumor
Cell migration
Cell physiology
Cell signaling
Cell survival
Cell transformation and carcinogenesis. Action of oncogenes and antioncogenes
Ceramide
Ceramides - metabolism
Dermatology
Dosage and administration
Drug therapy
Enzyme inhibitors
Fundamental and applied biological sciences. Psychology
G protein-coupled receptors
Genetics
Gynecology. Andrology. Obstetrics
Health aspects
Human Genetics
Humans
Internal Medicine
Kinases
Lipids
Lysophosphatidylcholine
Lysophosphatidylcholines - metabolism
Lysophospholipids - physiology
Mammary gland diseases
Medical sciences
Medicine
Medicine & Public Health
Melanoma
Melanoma - metabolism
Melanoma - pathology
Melanoma - prevention & control
Membrane Potential, Mitochondrial - drug effects
Metastases
Molecular and cellular biology
Multienzyme Complexes - physiology
Oncology
original-article
Paclitaxel
Paclitaxel - pharmacology
Phosphodiesterase I - physiology
Phosphodiesterases
Phosphoric Diester Hydrolases
Physiological aspects
Pyrophosphatases - physiology
Reverse Transcriptase Polymerase Chain Reaction
RNA, Messenger - genetics
RNA, Messenger - metabolism
Tumors
Tumors of the skin and soft tissue. Premalignant lesions
title Autotaxin protects MCF-7 breast cancer and MDA-MB-435 melanoma cells against Taxol-induced apoptosis
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