Name: lc-ms analysis of human platelets as a platform for studying mitochondrial metabolism
Uploaded: 2016-04-04T15:00:00
Description: Watch this Scientific Journal Video about LC-MS Analysis of Human Platelets as a Platform for Studying Mitochondrial Metabolism at JoVE.com

Vi anerkender støtten fra NIH tilskud P30ES013508 og T32ES019851.

Etik Statement: Alle protokoller vedrørende behandlingen af ​​humane prøver følge retningslinjerne fra The University of Pennsylvania menneskelige videnskabsetisk komité. 1. Udarbejdelse af buffere og 100x Stock Solutions <ol><li> Forbered 1 L basen Tyrodes buffer. Kombiner 8,123 g NaCl, 1,428 g NaHCO3, 0,466 g CaCl2 ∙ 2 H2O, 0,224 g KCI, og 0,095 g MgCl 2. Juster samlet volumen på 1 liter med Hedeselskabet 2 O. Filtersteril...

<ol>
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Her har vi vist nytten af ​​isolerede blodplader som en platform for at studere forstyrres mitokondrie stofskifte. Specifikt har vi kendetegnet metabolisk tilpasning som svar på komplekse I inhibering med rotenon. Nærværende undersøgelse har forlænget tidligere rapporterede resultater på den rolle, komplekse I hæmning af rotenon i cellelinjer til humane blodplader. Vigtigere er, har dette vist, at rotenon også inhiberede blodplade succinyl-CoA-dannelse, stimulerede en stigning i ...

Dysfunktionel mitochondrial metabolisme er blevet impliceret i en lang række sygdomme, herunder neurodegeneration, kræft og hjertekarsygdomme 30. Som sådan har stor indsats blevet placeret på karakterisering metaboliske defekter, der bidrager til sygdommen patogenese. Væskekromatografi-tandem massespektrometri (LC-MS / MS) betragtes som den gyldne standard for kvantificering af analytter fra komplekse biologiske matricer og er ofte ansat til metaboliske undersøgelser 8. Men som det ofte er tilfældet med biomedicinske undersøgelser, opnå en tilgængelig og veldefineret model relevant for human sygdom er en udfordring. Mange undersøgelser beskæftiger forvandlet cellulære modeller til sondering af virkningen af miljøfremmede stoffer eller genetiske abnormiteter på cellulær metabolisme 7,9. Den metaboliske omprogrammering, der forekommer i cancerceller kan introducere forstyrrende faktorer 21 og er derfor ikke ideel. Disse spørgsmål kan være circumvented med primære celle modeller, selv om at opnå tilstrækkelig biomasse til metaboliske analyser kan være udfordrende. Endvidere har effekten af høje mængder af antibiotika, der anvendes i kultur blevet fremhævet som potentielt confounding mitokondrie undersøgelser 16. Humane blodplader opnåelse af muligheden for at udnytte en primær celle model med tilstrækkelig mitokondrie indhold til metaboliske undersøgelser 5,22,27,32. Først kan blodplader let erhverves gennem blod trækker fra individuelle donorer, eller i store mængder fra blodbanker, og giver derfor en model, hvor eksterne faktorer kan let kontrolleres. For det andet på grund af deres lille størrelse, blodplader kan let isoleres fra andre blodkomponenter med minimal forberedende arbejde i selv minimalt udstyrede laboratorier 5. Af note, behøver blodplader ikke indeholde kerner og kan derfor anvendes til at studere ændringer i metabolisme uafhængigt af transkriptionel regulering. Her viser vi, atforuden relativ kvantificering af acyl-coenzym A (CoA) thioestere, kan det isolerede blodplade systemet, anvendes til at undersøge carbon metabolisme. Konkret rapporterer vi brug af metabolisk mærkning med stabile isotoper (ikke-radioaktivt) mærket [13C 6] glucose og [13C 16] -palmitat til sonde inkorporering af [13C] -mærket, ind i den vigtige metabolit acetyl- CoA via glykolyse eller fedtsyreoxidation. Dette giver en stærk, generaliseres, og alsidig platform på grund af den omfattende inddragelse af acyl-CoA arter i biokemiske veje 13,24 og sporbarhed af dette system til at teste andre variabler, såsom hæmning af kompleks I med rotenon 3,33. Ud over oplysningerne i protokollen nedenfor, kan en omfattende beskrivelse af de metoder, der anvendes til isotop mærkning og for LC-MS-baserede analyser findes i Basu og Blair 4.

<table border="0" cellpadding="0" cellspacing="0" width="406">
	<tbody>
		<tr height="21">
			<td height="21" style="height:21px;width:161px;">Reagent</td>
			<td style="width:92px;"></td>
			<td style="width:68px;"></td>
			<td style="width:85px;"></td>
		</tr>
		<tr height="29">
			<td height="29" style="height:29px;width:161px;">Sodium Chloride (NaCl)</td>
			<td style="width:92px;">Sigma-Aldrich</td>
			<td style="width:68px;">746398</td>
			<td style="width:85px;"></td>
		</tr>
		<tr height="29">
			<td height="29" style="height:29px;width:161px;">Sodium Bicarbonate (NaHCO3)</td>
			<td style="width:92px;">Sigma-Aldrich</td>
			<td style="width:68px;">S5761</td>
			<td style="width:85px;"></td>
		</tr>
		<tr height="29">
			<td height="29" style="height:29px;width:161px;">Calcium Chloride Dihydrate (CaCl2 * H2O)</td>
			<td style="width:92px;">Sigma-Aldrich</td>
			<td style="width:68px;">223506</td>
			<td style="width:85px;"></td>
		</tr>
		<tr height="29">
			<td height="29" style="height:29px;width:161px;">Potassium Chloride (KCl)</td>
			<td style="width:92px;">Sigma-Aldrich</td>
			<td style="width:68px;">P9541</td>
			<td style="width:85px;"></td>
		</tr>
		<tr height="29">
			<td height="29" style="height:29px;width:161px;">Magnesium Chloride (MgCl2)</td>
			<td style="width:92px;">Sigma-Aldrich</td>
			<td style="width:68px;">208337</td>
			<td style="width:85px;"></td>
		</tr>
		<tr height="29">
			<td height="29" style="height:29px;width:161px;">Glucose</td>
			<td style="width:92px;">Sigma-Aldrich</td>
			<td style="width:68px;">G8270</td>
			<td style="width:85px;"></td>
		</tr>
		<tr height="29">
			<td height="29" style="height:29px;width:161px;">13C6-Glucose</td>
			<td style="width:92px;">Sigma-Aldrich</td>
			<td>389374</td>
			<td style="width:85px;"></td>
		</tr>
		<tr height="29">
			<td height="29" style="height:29px;width:161px;">Palmitic acid</td>
			<td style="width:92px;">Cayman</td>
			<td style="width:68px;">10006627</td>
			<td style="width:85px;"></td>
		</tr>
		<tr height="29">
			<td height="29" style="height:29px;width:161px;">13C16-Palmitic Acid</td>
			<td style="width:92px;">Sigma-Aldrich</td>
			<td style="width:68px;">605573</td>
			<td style="width:85px;"></td>
		</tr>
		<tr height="29">
			<td height="29" style="height:29px;width:161px;">Rotenone</td>
			<td style="width:92px;">Sigma-Aldrich</td>
			<td style="width:68px;">R8875</td>
			<td style="width:85px;"></td>
		</tr>
		<tr height="29">
			<td height="29" style="height:29px;width:161px;">Trichloro Acetic Acid</td>
			<td style="width:92px;">Sigma-Aldrich</td>
			<td style="width:68px;">T6399</td>
			<td style="width:85px;"></td>
		</tr>
		<tr height="29">
			<td height="29" style="height:29px;width:161px;">5-Sulfosalicylic Acid</td>
			<td style="width:92px;">Sigma-Aldrich</td>
			<td style="width:68px;">390275</td>
			<td style="width:85px;"></td>
		</tr>
		<tr height="29">
			<td height="29" style="height:29px;width:161px;">Acetonitirle</td>
			<td style="width:92px;">Fischer Scientific</td>
			<td style="width:68px;">A996-4</td>
			<td style="width:85px;">(optima)</td>
		</tr>
		<tr height="29">
			<td height="29" style="height:29px;width:161px;">Water (H2O)</td>
			<td style="width:92px;">Fischer Scientific</td>
			<td style="width:68px;">W7-4</td>
			<td style="width:85px;">(optima)</td>
		</tr>
		<tr height="29">
			<td height="29" style="height:29px;width:161px;">Formic acid</td>
			<td style="width:92px;">Fischer Scientific</td>
			<td style="width:68px;">85171</td>
			<td style="width:85px;">(optima)</td>
		</tr>
		<tr height="29">
			<td height="29" style="height:29px;width:161px;">Dimethyl Sulfoxide</td>
			<td style="width:92px;">Sigma-Aldrich</td>
			<td style="width:68px;">472301</td>
			<td style="width:85px;"></td>
		</tr>
		<tr height="29">
			<td height="29" style="height:29px;width:161px;">Ethanol</td>
			<td style="width:92px;">Fischer Scientific</td>
			<td style="width:68px;">04-355-222</td>
			<td style="width:85px;"></td>
		</tr>
		<tr height="29">
			<td height="29" style="height:29px;width:161px;">Methanol</td>
			<td style="width:92px;">Fischer Scientific</td>
			<td style="width:68px;">A454-4</td>
			<td style="width:85px;">(optima)</td>
		</tr>
		<tr height="29">
			<td height="29" style="height:29px;width:161px;">Ammonium Acetate</td>
			<td style="width:92px;">Fischer Scientific</td>
			<td style="width:68px;">A639-500</td>
			<td style="width:85px;"></td>
		</tr>
		<tr height="29">
			<td height="29" style="height:29px;width:161px;">2 mL Eppendorf Tubes</td>
			<td style="width:92px;">BioExpress</td>
			<td style="width:68px;">C-3229-1</td>
			<td style="width:85px;"></td>
		</tr>
		<tr height="29">
			<td height="29" style="height:29px;width:161px;">LC vials (plastic)</td>
			<td style="width:92px;">Waters</td>
			<td style="width:68px;">186002640</td>
			<td style="width:85px;"></td>
		</tr>
		<tr height="29">
			<td height="29" style="height:29px;width:161px;">10 mL Glass Centrifuge Tubes</td>
			<td style="width:92px;">Kimble Chase</td>
			<td style="width:68px;">73785-10</td>
			<td style="width:85px;"></td>
		</tr>
		<tr height="29">
			<td height="29" style="height:29px;width:161px;">Oasis Solid Phase Extraxtion (SPE) Columns</td>
			<td style="width:92px;">Waters</td>
			<td style="width:68px;">WAT094225</td>
			<td style="width:85px;"></td>
		</tr>
		<tr height="29">
			<td height="29" style="height:29px;width:161px;">Pastuer Pipets</td>
			<td style="width:92px;">Fischer Scientific</td>
			<td style="width:68px;">13-678-200</td>
			<td style="width:85px;"></td>
		</tr>
		<tr height="31">
			<td height="31" style="height:31px;width:161px;">Name</td>
			<td style="width:92px;">Company</td>
			<td style="width:68px;">Catalog Number</td>
			<td style="width:85px;">Comments</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:161px;">Equipment</td>
			<td style="width:92px;"></td>
			<td style="width:68px;"></td>
			<td style="width:85px;"></td>
		</tr>
		<tr height="30">
			<td height="30" style="height:30px;width:161px;">CO2 Water-Jacketed Incubator</td>
			<td style="width:92px;">Nuaire</td>
			<td style="width:68px;">AutoFlow NU-8500</td>
			<td style="width:85px;"></td>
		</tr>
		<tr height="45">
			<td height="45" style="height:45px;width:161px;">Triple Quadropole Mass Spectrometer</td>
			<td style="width:92px;">Thermo Scientific</td>
			<td style="width:68px;">Finnigan TSQ Quantum</td>
			<td style="width:85px;"></td>
		</tr>
		<tr height="45">
			<td height="45" style="height:45px;width:161px;">HPLC</td>
			<td style="width:92px;">Thermo Scientific</td>
			<td style="width:68px;">Dionex Ultimate 3000</td>
			<td style="width:85px;"></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:161px;">Source</td>
			<td style="width:92px;">Thermo Scientific</td>
			<td style="width:68px;">HESI II</td>
			<td style="width:85px;"></td>
		</tr>
		<tr height="46">
			<td height="46" style="height:46px;width:161px;">HPLC Column</td>
			<td style="width:92px;">Phenomenex</td>
			<td style="width:68px;">Luna C18</td>
			<td style="width:85px;">3 &#956;m particle size, 200 mm x 2 mm</td>
		</tr>
	</tbody>
</table>

lc-ms analysis of human platelets as a platform for studying mitochondrial metabolism

Perturbed mitochondrial metabolism has received renewed interest as playing a causative role in a range of diseases. Probing alterations to metabolic pathways requires a model in which external factors can be well controlled, allowing for reproducible and meaningful results. Many studies employ transformed cellular models for these purposes; however, metabolic reprogramming that occurs in many cancer cell lines may introduce confounding variables. For this reason primary cells are desirable, though attaining adequate biomass for metabolic studies can be challenging. Here we show that human platelets can be utilized as a platform to carry out metabolic studies in combination with liquid chromatography-tandem mass spectrometry analysis. This approach is amenable to relative quantification and isotopic labeling to probe the activity of specific metabolic pathways. Availability of platelets from individual donors or from blood banks makes this model system applicable to clinical studies and feasible to scale up. Here we utilize isolated platelets to confirm previously identified compensatory metabolic shifts in response to the complex I inhibitor rotenone. More specifically, a decrease in glycolysis is accompanied by an increase in fatty acid oxidation to maintain acetyl-CoA levels. Our results show that platelets can be used as an easily accessible and medically relevant model to probe the effects of xenobiotics on cellular metabolism.

For at demonstrere anvendeligheden af ​​denne metode har vi gengivet den generaliserbarhed af tidligere beskrevet kompenserende metabolisk tilpasning som følge af udsættelse for rotenon. Dette fund blev tidligere identificeret i cellekulturmodeller og denne undersøgelse havde til formål at teste, om denne metaboliske skift også forekommer i blodplader, som er anuclear og ikke udsat for de samme eksperimentelle artefakter som cellekultur. Dette arbejde blev udført med 6 dage gam...

Watch this Scientific Journal Video about LC-MS Analysis of Human Platelets as a Platform for Studying Mitochondrial Metabolism at JoVE.com

LC-MS Analysis of Human Platelets as a Platform for Studying Mitochondrial Metabolism

Her viser vi isolerede humane blodplader kan anvendes som en tilgængelig ex vivo-model til at studere metaboliske tilpasninger som reaktion på komplekset I inhibitoren rotenon. Denne fremgangsmåde anvender isotopisk sporing og relativ kvantificering ved væskekromatografi-massespektrometri og kan anvendes til en række af undersøgelsestyper.

LC-MS analyse af humane blodplader som en platform for at studere Mitokondriel Metabolism

Perturbed mitochondrial metabolism has received renewed interest as playing a causative role in a range of diseases. Probing alterations to metabolic ...

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SCIENTISTS IN ACTION

Technique for Studying Arthropod and Microbial Communities within Tree Tissues

Teknik til at studere leddyr og mikrobielle samfund i Tree Væv

Phloem tissues of pine are habitats for many thousands of organisms.  Arthropods and microbes use phloem and cambium tissues to seek mates, lay eggs, rear ...

Transient Gene Expression in Tobacco using Gibson Assembly and the Gene Gun

Forbigående genekspression i Tobacco hjælp Gibson forsamling og Gene Gun

In order to target a single protein to multiple subcellular organelles, plants typically duplicate the relevant genes, and express each gene separately ...

Use of Chironomidae (Diptera) Surface-Floating Pupal Exuviae as a Rapid Bioassessment Protocol for Water Bodies

Use of Chironomidae Diptera Surface-Floating Pupal Exuviae as a Rapid Bioassessment Protocol for Water Bodies

Anvendelse af Chironomidae (Diptera) Overflade-Floating puppe Exuviae som Rapid Bioassessment protokol for vandområder

Rapid bioassessment protocols using benthic macroinvertebrate assemblages have been successfully used to assess human impacts on water quality. ...

Modification and Application of a Leaf Blower-vac for Field Sampling of Arthropods

Ændring og anvendelse af en løvblæser-vac for Field Sampling af leddyr

Rice fields host a large diversity of arthropods, but investigating their population dynamics and interactions is challenging. Here we describe the ...

Thermal Scanning Conductometry (TSC) as a General Method for Studying and Controlling the Phase Behavior of Conductive Physical Gels

Thermal Scanning Conductometry TSC as a General Method for Studying and Controlling the Phase Behavior of Conductive Physical Gels

Termisk scanne Conductometry (TSC) som en generel metode for at studere og kontrollerende fase adfærd af ledende fysiske geler

The thermal scanning conductometry protocol is a new approach in studying ionic gels based on low molecular weight gelators. The method is designed to ...

Quantifying Plant Soluble Protein and Digestible Carbohydrate Content, Using Corn (Zea mays) As an Exemplar

Quantifying Plant Soluble Protein and Digestible Carbohydrate Content, Using Corn Zea mays As an Exemplar

Kvantificere plante opløseligt Protein og fordøjeligt kulhydrat indhold, ved hjælp af majs (Zea mays) som en eksemplarisk

Elemental data are commonly used to infer plant quality as a resource to herbivores. However, the ubiquity of carbon in biomolecules, the presence of ...

Studying Neurobehavioral Effects of Environmental Pollutants on Zebrafish Larvae

Undersøgelse Neurobehavioral Virkninger af miljøforurenende stoffer på Zebrafisk Larver

Recent years more and more environmental pollutants have been proved neurotoxic, especially at the early development stages of organisms. Zebrafish larvae ...

The Effect of Construction and Demolition Waste Plastic Fractions on Wood-Polymer Composite Properties

Effekten af byggeri og nedrivning affald plastfraktioner på træ-Polymer Composite Egenskaber

Construction and demolition waste (CDW), including valuable materials such as plastics, have a remarkable influence on the waste sector. In order for ...

A Gnotobiotic System for Studying Microbiome Assembly in the Phyllosphere and in Vegetable Fermentation

Et gnotobiotisk system til undersøgelse af mikrobiomsamling i Phyllosfæren og i vegetabilsk fermentering

The phyllosphere, the above ground portion of the plant that can be colonized by microbes, is a useful model system to identify processes of microbial ...

Microplot Design and Plant and Soil Sample Preparation for 15Nitrogen Analysis

Microplot Design and Plant and Soil Sample Preparation for 15Nitrogen Analysis

Mikroplottedesign og forberedelse af plante- og jordprøver til 15 kvælstofanalyser

Many&#160;nitrogen fertilizer studies evaluate the overall effect of a treatment on end-of-season measurements such as grain yield or cumulative N losses. ...