| Create Account | login

login

Publication

Microsomal Triglyceride Transfer Protein (MTP) Associates with Cytosolic Lipid
Droplets in 3T3-L1 Adipocytes.

Authors	Love JD, Suzuki T, Robinson DB, Harris CM, Johnson JE, Mohler PJ, Jerome WG, Swift LL
Submitted By	Submitted Externally on 11/3/2015
Status	Published
Journal	PLoS ONE
Year	2015
Date Published
Volume : Pages	10 : e0135598
PubMed Reference	26267806
Abstract	Lipid droplets are intracellular energy storage organelles composed of a hydrophobic core of neutral lipid, surrounded by a monolayer of phospholipid and a diverse array of proteins. The function of the vast majority of these proteins with regard to the formation and/or turnover of lipid droplets is unknown. Our laboratory was the first to report that microsomal triglyceride transfer protein (MTP), a lipid transfer protein essential for the assembly of triglyceride-rich lipoproteins, was expressed in adipose tissue of humans and mice. In addition, our studies suggested that MTP was associated with lipid droplets in both brown and white fat. Our observations led us to hypothesize that MTP plays a key role in lipid droplet formation and/or turnover. The objective of these studies was to gain insight into the function of MTP in adipocytes. Using molecular, biochemical, and morphologic approaches we have shown: 1) MTP protein levels increase nearly five-fold as 3T3-L1 cells differentiate into adipocytes. 2) As 3T3-L1 cells undergo differentiation, MTP moves from the juxtanuclear region of the cell to the surface of lipid droplets. MTP and perilipin 2, a major lipid droplet surface protein, are found on the same droplets; however, MTP does not co-localize with perilipin 2. 3) Inhibition of MTP activity has no effect on the movement of triglyceride out of the cell either as a lipid complex or via lipolysis. 4) MTP is found associated with lipid droplets within hepatocytes from human fatty livers, suggesting that association of MTP with lipid droplets is not restricted to adipocytes. In summary, our data demonstrate that MTP is a lipid droplet-associated protein. Its location on the surface of the droplet in adipocytes and hepatocytes, coupled with its known function as a lipid transfer protein and its increased expression during adipocyte differentiation suggest a role in lipid droplet biology.

Back to Top

Store Credentials?

MMPC-Live web resource – Terms of Use

Warranty disclaimer and copyright notice

THE MMPC-Live MAKES NO REPRESENTATION ABOUT THE SUITABILITY OR ACCURACY OF THE SOFTWARE OR DATA FOR ANY PURPOSE, AND MAKES NO WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE OR THAT THE USE OF THE SOFTWARE OR DATA WILL NOT INFRINGE ANY THIRD PARTY PATENTS, COPYRIGHTS, TRADEMARKS, OR OTHER RIGHTS. THE SOFTWARE AND DATA ARE PROVIDED "AS IS".

The Mouse Metabolic Phenotyping Centers (MMPC-Live) is an NIDDK funded consortium and adheres to the NIH Data Sharing Policy.

MMPC-Live clients make their data freely available whereby MMPC-Live users may freely build upon, enhance and reuse those data for any purpose without restriction. Scholarly citation norms must be followed for content reuse. Please acknowledge the MMPC-Live using the following text: 'The MMPC-Live data used in this manuscript was supported by the NIDDK National Mouse Metabolic Phenotyping Centers (MMPC-Live, RRID:SCR_008997, www.mmpc.org)'. To cite specific MMPC-Live centers, please use the appropriate RRID available from the MMPC-Live website (https://www.mmpc.org/shared/centers.aspx).

Please note that the acknowledgment text includes a Research Resource Identifier (RRID) for the MMPC-Live CU and Centers. Reproducibility is one of the corner stones of effective, open and transparent biomedical published research. However, too often, resources (e.g. model organisms, antibodies, and tools) are not reported with adequate detail to ensure others can replicate or expand upon the published results. The Research Resource Identification Initiative (#RII) seeks to change these limitations in reporting by the use of unique Research Resource Identifiers (RRIDs). This initiative is designed to encourage authors to provide identification of the types of resources used in their research by adding a globally unique accession number to the resources described in the their manuscripts. These identifiers, called RRIDs, will allow authors to cite the resources that they use in their manuscripts. RRIDs allow for easy tracking of all papers that have used the same resource making it easy to access how the same resources works in other scenarios.

It is expected that MMPC-Live users follow scholarly citation norms, giving credit to fellow scholars when accessing/using protocols and data, including data derived by MMPC-Live (such as summary data) and any plots, tables or screenshots depicting those data.

It is possible for invalid or incomplete results to be presented on the MMPC-Live web site due to software bugs, data problems, or artifacts of human error. Data sets are not necessarily static; we reserve the right to post corrections and updates as needed.

Prohibited use. Data contributors and data users may not use MMPC-Live in any unlawful manner, or in any manner that could impair MMPC-Live services, security or functionality. Automated usage (webcrawlers and similar) must observe each page's "meta robots" html tags and space requests by ≥ 2 seconds. We reserve the right to block any IP associated with what we consider to be excessive or abusive usage patterns, and/or to take any action we deem necessary.

MMPC-Live is a National Institutes of Health-sponsored resource that provides experimental testing services to scientists studying diabetes, obesity, diabetic complications, and other metabolic diseases in mice.

Menu

Home

Contact

About MMPC

Animal Husbandry

Tests Data

Search Data

Analysis

Clients

MMPC Centers

Newsletter

Interested in receiving MMPC News?

Mouse Phenotyping
@NationalMMPC

2017 National MMPC. All Rights Reserved.