期刊
JOURNAL OF MUSCLE RESEARCH AND CELL MOTILITY
卷 23, 期 7-8, 页码 803-808出版社
KLUWER ACADEMIC PUBL
DOI: 10.1023/A:1024435913949
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Macropinocytosis (fluid uptake) and phagocytosis (particle uptake) are processes that result in the formation of intracellular membrane enclosed vacuoles termed macropinosomes and phagosomes, respectively. Macropinosomes and phagosomes are modified by fission and fusion reactions with the endo-lysosomal pathway that eventually transform these vacuoles into a lysosomal environment. Many human bacterial pathogens, including species of Mycobacteria, Legionella, and Chlamydia, are thought to survive by disrupting the normal membrane trafficking events that usually result in the formation of phago-lysosomes and death of the microorganism. In addition, a number of important pathogens facilitate homotypic phagosome fusion in order to generate an intracellular environment conducive for survival. A greater understanding of the regulation of phagosomal maturation and fusion will be critical in designing new therapies to treat infections caused by intracellular pathogens. The genetically tractable phagocyte, D. discoideum, has proven extremely useful in dissecting the signaling pathways regulating macropinocytosis, phagocytosis, phagosomal maturation and phagosome - phagosome fusion. A body of knowledge has accumulated and demonstrates important roles for Rab GTPases, the cytoskeleton, phosphoinositide metabolism and pH regulation in regulating phagosome maturation. This review will summarize the current state of knowledge.
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