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Betydelsen av interleukin 4 receptorn (IL-4R) i stimulering av lymfom- och leukemiceller
Malmö högskola, Faculty of Health and Society (HS).
2011 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [sv]

Cytokiner eller interleukiner är signalpeptider med låg molekylär vikt som reglerar många viktiga funktioner. De kan delas in i två grupper beroende på deras effekt på celler. Interleukin 4 (IL-4) till exempel kan tillhöra gruppen tillväxtfaktorer medan interleukin 6 (IL-6) kan tillhöra gruppen aktiverings- eller differentieringsfaktorer. IgM-receptorn eller B-cellsreceptorn, BCR, finns på Bceller och är membranbundna immunoglobuliner (mIg) som har två huvuduppgifter; att förmedla signaler som styr B-cellens utveckling samt att binda in antigen som sedan ska presenteras för T-celler. I studien aktiverades B-celler med antikropp mot IgM (anti-IgM) samt rekombinant IL-4. Efter stimulering analyserades IL-6 produktionen med enzyme-linked immunosorbent assay (ELISA). Syftet med studien var att karakterisera uttrycket av IL-4 receptorn på lymfom- och leukemiceller med flödescytometri och polymeras chain reaction (PCR) samt produktion av IL-6 med ELISA. ELISA-analysen visade att två cellinjer, stimulerade Sp53 och stimulerade samt kontroller av WaC3CD5+, gav en ökning av IL-6 produktionen. Vid jämförelse med ELISA-resultaten och flödescytometri-analyserna ser man att WaC3CD5+ som producerat stora mängder IL-6, har en liten andel IL-4 receptorer på cellytan. Resultatet av PCRanalysen visar att det var framförallt Sp53 som fick höga mängder IL-4R mRNA, men även I83, U2932 och WaC3CD5+ fick positiva resultat. Resultaten i denna studie är preliminära och för att få mer säkerställda resultat krävs att alla analyser görs om ett antal gånger för att få ett mer tillförlitligt resultat.

Abstract [en]

Cytokines or interleukins are signal peptides of low molecular weight, which regulates many important functions. They can roughly be divided into two groups or divisions due to their effect on cells. Interleukin 4 (IL-4), for example, belongs to the group growth factors while interleukin-6 (IL-6) belongs to the group activation or differentiation factors. IgM receptors or B cell receptors, BCR, are expressed on B cells and are membrane-bound immunoglobulins (mIg) and have two main functions: to convey signals that control B cell activation and to bind antigen which will then be presented to T cells. In the study B cells were activated with antibodies against IgM (anti-IgM) and recombinant IL-4. After stimulation the IL-6 production was analysed by enzyme-linked immunosorbent assay (ELISA). The purpose of this study was to characterize the expression of IL-4 receptor in lymphoma and leukemia cells by flow cytometry and polymerase chain reaction (PCR) and furthermore the production of IL-6 by ELISA. ELISA analysis showed that two cell lines, stimulated Sp53 and stimulated and control of WaC3CD5+, resulted in an increased IL-6 production. When comparing ELISA results and flow cytometry assays, it can be seen that WaC3CD5+, which produced large amounts of IL-6, has a small percentage of IL-4 receptors on the cell surface. The results of the PCR analysis shows that particularly Sp53 displayed high amounts of IL-4 mRNA, but also I83, U2932 and WaC3CD5+ were positive for IL-4 mRNA. The results of this study are preliminary, and to get more trustworthy results, all analyses have to be repeated to get more reliable results.

Place, publisher, year, edition, pages
Malmö högskola/Hälsa och samhälle , 2011. , p. 21
Keywords [sv]
ELISA, flow cytometry, IL-4 receptor, lymphoma, PCR
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:mau:diva-24758Local ID: 12218OAI: oai:DiVA.org:mau-24758DiVA, id: diva2:1486179
Educational program
HS Biomedicinsk laboratorievetenskap
Available from: 2020-11-02 Created: 2020-11-02 Last updated: 2022-06-27Bibliographically approved

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