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<p><b>New page</b></p><div>[[File:Rassart_Figure_1.jpg|Rassart Figure 1|thumb]] [[File:Rassart_Figure_2.jpg|Rassart Figure 2|thumb|left]] '''Apolipoprotein D''' ('''APOD''') is a [[protein]] that in humans is encoded by the ''APOD'' [[gene]]. It is a component of [[high-density lipoprotein]] (HDL) in the [[blood plasma]] and plays a critical role in [[lipid metabolism]], [[neuroprotection]], and [[oxidative stress]]. APOD is part of the [[apolipoprotein]] family, which is essential for the transport of [[lipids]] through the [[lymphatic system]] and bloodstream.<br />
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== Function ==<br />
Apolipoprotein D is involved in the transport and binding of [[lipid]] molecules within the [[circulatory system]], facilitating their movement and utilization throughout the body. It has a high affinity for certain types of lipids, such as [[arachidonic acid]], and is believed to play a role in the [[brain]]'s response to [[oxidative stress]], [[neuroprotection]], and the repair of [[neurons]]. Its expression is upregulated in response to stress and injury, suggesting a protective role in the [[nervous system]].<br />
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== Structure ==<br />
The APOD protein is a glycoprotein and is part of the lipocalin family, which transports small hydrophobic molecules. It is characterized by a barrel-shaped tertiary structure that allows it to bind to small lipid molecules. The gene encoding APOD is located on [[chromosome 3]] (3q29) in humans.<br />
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== Clinical Significance ==<br />
Elevated levels of APOD have been observed in various diseases and conditions, including [[neurodegenerative diseases]] such as [[Alzheimer's disease]] and [[Parkinson's disease]], as well as in aging. Its role in these conditions is not fully understood, but it is thought to be related to its functions in lipid transport and neuroprotection. Research suggests that APOD may have potential as a biomarker for certain diseases and as a target for therapeutic interventions.<br />
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== Research ==<br />
Ongoing research is focused on elucidating the precise mechanisms by which APOD contributes to neuroprotection, lipid metabolism, and the response to oxidative stress. Studies are also investigating the potential therapeutic applications of APOD, including its use as a biomarker for early detection of neurodegenerative diseases and as a target for drug development aimed at modulating its expression or function.<br />
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[[Category:Proteins]]<br />
[[Category:Human proteins]]<br />
[[Category:Lipid metabolism]]<br />
[[Category:Neuroscience]]<br />
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