<?xml version="1.0" encoding="utf-8"?>
<article article-type="research-article" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:mml="http://www.w3.org/1998/Math/MathML">
    <front>
        <journal-meta>
            <journal-id journal-id-type="publisher-id">TOBIOJ</journal-id>
            <journal-title>The Open Biology Journal</journal-title>
            <abbrev-journal-title abbrev-type="pubmed">Open Biol. J.</abbrev-journal-title>
            <issn pub-type="epub">1874-1967</issn>
            <publisher>
                <publisher-name>Bentham Open</publisher-name>
            </publisher>
        </journal-meta>
        <article-meta>
            <article-id pub-id-type="publisher-id">TOBIOJ-3-21</article-id>
            <article-id pub-id-type="doi">10.2174/18741967010030100021</article-id>
            <article-categories>
                <subj-group subj-group-type="heading">
                    <subject>Biology</subject>
                </subj-group>
            </article-categories>
            <title-group>
                <article-title>Amyloidogenic Processing of APP in Lipid Rafts</article-title>
            </title-group>
            <contrib-group>
                <contrib contrib-type="author" corresp="yes">
                    <name>
                        <surname>K. Lakshmana</surname>
                        <given-names>Madepalli</given-names>
                    </name>
                    <xref ref-type="corresp" rid="cor1">&#x002A;</xref>
                </contrib>
                <contrib contrib-type="author">
                    <name>
                        <surname>Roy</surname>
                        <given-names>Subhojit</given-names>
                    </name>
                </contrib>
                <contrib contrib-type="author">
                    <name>
                        <surname>Mi</surname>
                        <given-names>Kaihong</given-names>
                    </name>
                </contrib>
                <contrib contrib-type="author">
                    <name>
                        <surname>E. Kang</surname>
                        <given-names>David</given-names>
                    </name>
                </contrib>
            </contrib-group>
            <aff>Department of Neurosciences, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA.</aff>
            <author-notes>
                <corresp id="cor1">
                    <label>&#x002A;</label>Address correspondence to this author at the Dept. of Neurosciences,
MC0691, UC San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA;
Tel: 858-822-1025; Fax: 858-822-1021; E-mail: <email xlink:href="mlakshmana@ucsd.edu">mlakshmana@ucsd.edu</email></corresp>
            </author-notes>
            <pub-date pub-type="epub">
                <day>19</day>
                <month>3</month>
                <year>2010</year>
            </pub-date>
            <pub-date pub-type="collection">
                <year>2010</year>
            </pub-date>
            <volume>3</volume>
            <fpage>21</fpage>
            <lpage>31</lpage>
            <history>
                <date date-type="received">
                    <day>28</day>
                    <month>08</month>
                    <year>2009</year>
                </date>
                <date date-type="rev-recd">
                    <day>24</day>
                    <month>09</month>
                    <year>2009</year>
                </date>
                <date date-type="accepted">
                    <day>28</day>
                    <month>09</month>
                    <year>2009</year>
                </date>
            </history>
            <permissions>
                <copyright-statement>&#x00A9; 2010 Lakshmana <italic>et al</italic>.</copyright-statement>
                <copyright-year>2010</copyright-year>
                <copyright-holder>Madepalli K. Lakshmana</copyright-holder>
                <license license-type="open-access" xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://creativecommons.org/licenses/by/4.0/legalcode">
                    <p>This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: <uri xlink:href="https://creativecommons.org/licenses/by/4.0/legalcode">https://creativecommons.org/licenses/by/4.0/legalcode</uri>. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.</p>
                </license>
            </permissions>
            <abstract>
                <p>Increased generation of amyloid &#x003B2; peptide (A&#x003B2;) derived from amyloid precursor protein (APP) is the primary
pathological characteristic of Alzheimer&#x2019;s disease (AD). However, the sub cellular compartment in which APP undergoes
cleavage by secretases to generate A&#x003B2; is not precisely known. Compelling evidences suggest that amyloidogenic
processing of APP occurs in lipid rafts. An indirect support for lipid raft processing of APP includes the localization of
A&#x003B2;, APP C-terminal fragments (CTFs), APP holoprotein and secretases in the lipid raft microdomains, although few
studies failed to find APP in the lipid rafts. The indirect support also comes from both experimental and clinical studies
involving modulation of cholesterol levels and its effect on A&#x003B2; generation. Moderate depletion of cholesterol results in
significant reduction in A&#x003B2; levels and increased dietary intake of cholesterol leads to higher levels of A&#x003B2; production
suggesting that amyloidogenic processing of APP strongly depends on cholesterol levels and therefore on lipid raft
integrity. More convincing evidence that lipid rafts are critical for amyloidogenic processing of APP comes from studies
using antibody-mediated co-patching of APP and BACE1 which results in lipid raft association of APP and BACE1 and
increased A&#x003B2; generation. Further, an endosome/lipid raft targeting of &#x003B2;-secretase inhibitor by sterol-mediated anchoring
leading to reduced A&#x003B2; generation also suggests that lipid rafts are pivotal for amyloidogenic processing of APP. In the
absence of an effective therapy for AD, proteins responsible for delivery of APP to lipid rafts including LRP, RanBP9 and
ApoER2 may be excellent therapeutic targets in AD.</p>
            </abstract>
            <kwd-group>
                <title>Keywords</title>
                <kwd>Amyloid precursor protein</kwd>
                <kwd>A&#x003B2;</kwd>
                <kwd>lipid rafts</kwd>
                <kwd>C-terminal fragments</kwd>
                <kwd>BACE1</kwd>
                <kwd>&#x003B3;-secretase</kwd>
                <kwd>amyloidogenic processing</kwd>
                <kwd>RanBP9</kwd>
                <kwd>LRP</kwd>
                <kwd>detergent resistant membranes</kwd>
            </kwd-group>
        </article-meta>
    </front>
</article>
