Synchronized synthesis and intracellular transport of serum albumin and apolipoprotein B in cultured rat hepatocytes as studied by double immunofluorescenceGA Keller, C Glass, D Louvard, D Steinberg and SJ Singer
Synthesis and intracellular transport of two secretory proteins, serum albumin (SA) and apolipoprotein B (apo B) have been synchronized in primary cultures of normal rat hepatocytes to make possible immunocytochemical study of the transport pathway. Under appropriate conditions of cycloheximide treatment, synthesis of new protein was inhibited and, by double immunofluorescent labeling, the cells were found to be largely depleted of the SA and apo B previously synthesized. Re-initiation of protein synthesis led to sequential appearance of SA and apo B, first in the endoplasmic reticulum, then in the Golgi complex, and finally at the cell surface. These results indicate that it should be feasible to use this cell system for high- resolution investigation of the sequence of structures involved in intracellular transport of SA and apo B by corresponding immunolabeling experiments as observed by electron microscopy.
Volume 34,
Issue 9,
pp. 1223-1230,
09/01/1986
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N. Sakata, T. E. Phillips, and J. L. Dixon Distribution, transport, and degradation of apolipoprotein B-100 in HepG2 cells J. Lipid Res., December 1, 2001; 42(12): 1947 - 1958. [Abstract] [Full Text] [PDF] |
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X. Du, J. Daniel Stoops, J. R. Mertz, C. Michael Stanley, and J. L. Dixon Identification of Two Regions in Apolipoprotein B100 that are Exposed on the Cytosolic Side of the Endoplasmic Reticulum Membrane J. Cell Biol., May 4, 1998; 141(3): 585 - 599. [Abstract] [Full Text] [PDF] |
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M Mizuno and S. Singer A possible role for stable microtubules in intracellular transport from the endoplasmic reticulum to the Golgi apparatus J. Cell Sci., January 5, 1994; 107(5): 1321 - 1331. [Abstract] [PDF] |
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