Shedding light on host niches : Label-free in situ detection of Mycobacterium gordonae via carotenoids in macrophages by Raman microspectroscopy

Title data

Silge, Anja ; Abdou, Elias ; Schneider, Kilian ; Meisel, Susann ; Bocklitz, Thomas ; Lu-Walther, Hui-Wen ; Heintzmann, Rainer ; Rösch, Petra ; Popp, Jürgen:
Shedding light on host niches : Label-free in situ detection of Mycobacterium gordonae via carotenoids in macrophages by Raman microspectroscopy.
In: Cellular Microbiology. Vol. 17 (2015) Issue 6 . - pp. 832-842.
ISSN 1462-5822
DOI: https://doi.org/10.1111/cmi.12404

Official URL:

Abstract in another language

Macrophages are the primary habitat of pathogenic mycobacteria during infections. The current research about the host pathogen interaction on the cellular level is still going on. The present study proves the potential of Raman microspectroscopy as a label-free and non-invasive method to investigate intracellular mycobacteria in situ. Therefore, macrophages were infected with M.?gordonae, a mycobacterium known to cause inflammation linked to intracellular survival in macrophages. Here, we show that Raman maps provided spatial and spectral information about the position of bacteria within determined cell margins of macrophages in two dimensional scans and in three dimensional image stacks. Simultaneously, the relative intracellular concentration and distributions of cellular constituents such as DNA, proteins and lipids provided phenotypic information about the infected macrophages. Locations of bacteria outside or close to the outer membrane of the macrophages were notably different in their spectral pattern compared to intracellular once. Furthermore, accumulations of bacteria inside of macrophages exhibit distinct spectral/molecular information due to the chemical composition of the intracellular microenvironment. The data show that the connection of microscopically and chemically gained information provided by Raman microspectroscopy offers a new analytical way to detect and to characterize the mycobacterial infection of macrophages.

Further data

Item Type:	Article in a journal
Refereed:	Yes
Keywords:	Mycobacterium gordonae; Label-free detection; intracellular bacteria; single cell Raman microspectroscopy
Institutions of the University:	Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Computer Science > Lehrstuhl Künstliche Intelligenz in der Mikroskopie und Spektroskopie > Lehrstuhl Künstliche Intelligenz in der Mikroskopie und Spektroskopie - Univ.-Prof. Dr. Thomas Wilhelm Bocklitz
Result of work at the UBT:	No
DDC Subjects:	500 Science > 530 Physics
Date Deposited:	15 May 2023 10:27
Last Modified:	15 May 2023 10:27
URI:	https://eref.uni-bayreuth.de/id/eprint/76370