Method Article

Collectie, Isolatie, en Flowcytometrische analyse van de menselijke Endocervicale Monsters

DOI:

10.3791/51906

July 6th, 2014

In This Article

Summary

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The use of cytobrush sampling to collect lymphocytes and monocytes from the endocervix is a minimally invasive technique that provides samples for analysis of female genital tract immunity. In this protocol, we describe the collection of cytobrush samples and immune cell isolation for flow cytometry assays.

Abstract

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Despite the public health importance of mucosal pathogens (including HIV), relatively little is known about mucosal immunity, particularly at the female genital tract (FGT). Because heterosexual transmission now represents the dominant mechanism of HIV transmission, and given the continual spread of sexually transmitted infections (STIs), it is critical to understand the interplay between host and pathogen at the genital mucosa. The substantial gaps in knowledge around FGT immunity are partially due to the difficulty in successfully collecting and processing mucosal samples. In order to facilitate studies with sufficient sample size, collection techniques must be minimally invasive and efficient. To this end, a protocol for the collection of cervical cytobrush samples and subsequent isolation of cervical mononuclear cells (CMC) has been optimized. Using ex vivo flow cytometry-based immunophenotyping, it is possible to accurately and reliably quantify CMC lymphocyte/monocyte population frequencies and phenotypes. This technique can be coupled with the collection of cervical-vaginal lavage (CVL), which contains soluble immune mediators including cytokines, chemokines and anti-proteases, all of which can be used to determine the anti- or pro-inflammatory environment in the vagina.

Introduction

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De meerderheid van de nieuwe hiv-infecties wereldwijd ontstaan ​​door heteroseksuele overdracht, met vrouwen die 47% van de nieuwe infecties in 2011 (UNAIDS 1). Inzicht in de vrouwelijke geslachtsorganen (FGT), een van de belangrijkste toegangspoort portals voor HIV en andere seksueel overdraagbare ziekteverwekkers, is van groot belang op de weg naar het vinden van efficiënte strategieën om infectie te voorkomen. Immuunreacties op de genitale slijmvliezen zijn duidelijk uniek en verschillen van die gemeten in het perifere bloed 2. Echter, de huidige kennis van het immuunsysteem dynamiek de FGT hoogstens beperkt. Tot op heden, hebben de studies v....

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Protocol

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Ethiek verklaring: Het onderzoek ethiek van bestuur van zowel de Universiteit van Manitoba en Kenyatta National Hospital / Universiteit van Nairobi keurde deze studie en schriftelijk toestemming is verkregen van alle deelnemers aan de studie.

1. Voorbereiding van de media en CMC Collection Tubes

  1. Bereid fosfaat gebufferde zoutoplossing (PBS) oplossing (137,93 mM NaCl, 2,67 mM KCl, 8,1 mM Na 2 HPO 4, 1,47 mM KH 2PO 4). Autoclaaf voor steriliteit. Dit kan worden opgeslagen bij 4 ° C gedurende enkele maanden.
  2. Pre-monster 5 ml PBS in 50 ml Falcon buis (een per monster af te halen) en bewaar....

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Results

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Multiparameter flowcytometrie is een krachtig hulpmiddel om de fenotypes en functies van celondergroepen ontleden in voorheen uncharacterized weefsels. Analyse van CMC monsters kunnen informatie over zowel lymfocyten en monocyten populatie opleveren met de juiste gating strategieën.

Een representatieve CMC gating strategie, vergeleken met een PBMC profiel, weergegeven in figuur 2. Het FSC-A versus FSC-H plot maakt de uitsluiting van cel doubletten, die veel voorkomen in CMC .......

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Discussion

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Gezien de grote hiaten in de kennis met betrekking tot de immuniteit bij de vrouwelijke geslachtsorganen (FGT), kan fenotypische analyse van CMC's een breed scala aan inzichten in meerdere lymfocytenpopulaties op de baarmoederhals. In combinatie met proteomics analyse en viral load metingen in cervicale lavage, kan immuniteit voor seksueel overdraagbare aandoeningen (soa) s en andere ziekteverwekkers worden ontleed in verschillende populaties.

Technische overwegingen - CMC:

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Disclosures

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The authors have nothing to disclose.

Acknowledgements

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The authors would like to thank Joshua Kimani, clinical director of the research program at the University of Nairobi, for his assistance with mucosal immunology studies related to this protocol. The authors would like to acknowledge funding from CHVI grant MOP 86721.

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Materials

List of materials used in this article
NameCompanyCatalog NumberComments
100 μm cell strainer for 50 ml Falcon tubeBD352360CMC processing
RPMI 1640HycloneSH30027.01CMC processing
Fetal bovine serumLife technology16000044CMC processing
FungizoneLife technology15290-018CMC processing
Penicillin/streptomycinSigmaP4333-20mlCMC processing
50 ml Falcon tubeFisher14-959-49ACMC processing
Blood Bank disposable transfer pipetteFisher13-711-6MCMC processing
Cytobrush plusCooper surgicalC0121CMC sampling
Disposable cervical scraperQuick medical2183CMC sampling
15 ml Falcon tubeFisher14-959-70cCVL processsing
1.5 ml tube EppendorfFisher05-402-18CVL storage
LIVE/DEAD Fixable Cell Stain KitInvitrogenVariousFlow cytometry reagent
Fixation buffer (4% PFA)BD554655Flow cytometry regeant
IgG mouseSigmaI8765Flow cytometry regeant

References

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  1. UNAIDS. Global Report 2013. http://www.unaids.org/en/media/unaids/contentassets/documents/epidemiology/2013/gr2013/UNAIDS_Global_Report_2013_en.pdf. , (2013).
  2. Rodriguez-Garcia, M., Patel, M. V., Wira, C. R.

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Tags

Cervical Mononuclear CellsFlow Cytometry AnalysisCytobrush Sample CollectionCervical Vaginal LavageCell Isolation ProtocolImmunophenotyping TechniqueLymphocyte Monocyte PopulationsHIV Susceptibility ResearchFemale Genital TractPeripheral Blood Controls

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