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Bacterial colonisation of human spheroids
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Protein Science.
2024 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Bakteriell kolonisering av humana spheroider (Swedish)
Abstract [sv]

Bakterier koloniserar tumörer och kan antingen öka eller reducera tumörers tillväxt. De kan också designas för att kunna ge klinisk effekt in situ med målet att applicera det vid cancerbehandling. Probiotiska bakterier har bevisats ha en klinisk effekt i cancerstudier samt att de inte är patogena. De gör dem till väldigt lovande kandidater att studera. Trots lovande studier och teknologi så finns det inte så mycket kunskap om de grundläggande mekanismerna bakom själva kolonisationen. I denna studie implementerades en analys av medinkubationen av sfäroider och bakterier för att demonstrera att flagellum av Escherichia coli Nissle 1917 bidrar till kolonisationen av humana njurembryocellinjen U87. Den möjliga relevansen för upptäckterna i detta projekt diskuteras.

Abstract [en]

Bacteria colonize tumours and can either enhance or suppress tumour growth. They can also be engineered to provide therapeutic action in situ with the goal of applying it to cancer treatment. Probiotic bacteria have also shown to have intrinsic therapeutic abilities in relation to cancer as well as being non-pathogenic. Despite these promising discoveries and technology, little is known about the basic mechanisms of colonization. This study implemented a spheroid-bacteria coincubation assay to demonstrate that the flagellum of Escherichia coli Nissle 1917 aids its colonization of human embryonic kidney spheroids. This advantage is more pronounced in spheroids of the cancerous cell line U87. The possible relevance of these findings to tumour microbiology is discussed.

Place, publisher, year, edition, pages
2024.
Series
TRITA-CBH-GRU ; 2024:267
Keywords [en]
Spheroid, coculture, bacterial therapeutics, E. coli Nissle, bacterial motility
Keywords [sv]
Speroid, cokultur, bakteriella läkemedel, E. coli Nissle, Bakteriell motilitet
National Category
Medical Biotechnology (with a focus on Cell Biology (including Stem Cell Biology), Molecular Biology, Microbiology, Biochemistry or Biopharmacy)
Identifiers
URN: urn:nbn:se:kth:diva-351058OAI: oai:DiVA.org:kth-351058DiVA, id: diva2:1886083
External cooperation
Paris Sciences et Lettres University, Paris; Instiut Curie, Physico-Chimie Curie Laboratory
Subject / course
Biotechnology
Educational program
Master of Science - Medical Biotechnology
Supervisors
Examiners
Available from: 2024-07-30 Created: 2024-07-30

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Protein Science
Medical Biotechnology (with a focus on Cell Biology (including Stem Cell Biology), Molecular Biology, Microbiology, Biochemistry or Biopharmacy)

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CiteExportLink to record
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