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- W2085190636 abstract "Apolipoprotein E (apoE), a lipid transporting protein, has been postulated to participate in nerve regeneration. To better clarify apoE function in the olfactory system, we evaluated the amount and distribution of apoE in the olfactory bulb following olfactory nerve lesion in mice. Olfactory nerve was lesioned in 2- to 4-month-old mice by intranasal irrigation with Triton X-100. Olfactory bulbs were collected at 0, 3, 7, 21, 42, and 56 days postlesion, and both apoE concentrations and apoE distribution were determined. ApoE levels, as determined by immunoblot analysis, were twofold greater than normal during nerve degeneration at 3 days. ApoE levels remained elevated by approximately 1.5 times normal levels at 7 through 21 days after injury and returned to baseline by 56 days. Immunocytochemical studies supported these observations. ApoE immunoreactivity was prominent on the olfactory nerve at 3 days after lesion and decreased to baseline levels at later time periods. Double-labeling immunocytochemical studies confirmed that both reactive astroglia and microglia produced detectable amounts of apoE following the lesion. Return of apoE expression to baseline paralleled measures of olfactory nerve maturation as measured by olfactory marker protein. These data suggest that apoE increases concurrent with nerve degeneration. ApoE may facilitate efficient regeneration perhaps by recycling lipids from degenerating fibers for use by growing axons. The association of apoE genotype with dementing illnesses may represent a diminished ability to support a lifetime of nerve regeneration." @default.
- W2085190636 created "2016-06-24" @default.
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- W2085190636 date "2001-11-01" @default.
- W2085190636 modified "2023-10-18" @default.
- W2085190636 title "Apolipoprotein E Is Upregulated in Olfactory Bulb Glia Following Peripheral Receptor Lesion in Mice" @default.
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- W2085190636 doi "https://doi.org/10.1006/exnr.2001.7762" @default.
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