PXD044033

PXD044033 is an original dataset announced via ProteomeXchange.

Title	Proteomics of tumor associated microglia, tumor tissue from SB28 glioblastoma mice, and control microglia
Description	The 18 kDa translocator protein (TSPO) emerges as an important PET biomarker to assess the tumor microenvironment (TME) in glioblastoma. However, various cellular sources hamper interpretation and biological understanding of TSPO and other immune biomarkers in the TME. Thus, we established a novel method, combining immunomagnetic cell sorting after radiotracer injection (scRadiotracing) with 3D histology via light sheet microscopy and proteomics to dissect cellular allocation of TSPO enrichment in glioblastoma. Single tumor cells of implanted SB28 glioblastoma mice indicated 1.37-fold higher TSPO tracer uptake and 1.46-fold higher TSPO protein expression levels when compared to tumor associated microglia/macrophages (TAMs). Using proteomics, we compared the proteome of tumor associated microglia/macrophages (TAMs), Tumor tissue (TT) and control microglia from WT mice without glioblastoma. This analysis identified TAM specific targets for PET radioligand development with additional potential to monitor diverse TAM subpopulations in vivo. In summary, our data indicate that tumor cells need to be acknowledged as the main contributor to TSPO as a biomarker in glioblastoma. Combining cellular tracer uptake measures with 3D histology facilitates precise allocation of complex PET signal sources and will serve to validate novel TAM specific radioligands.
HostingRepository	PRIDE
AnnounceDate	2023-11-14
AnnouncementXML	Submission_2023-11-14_09:13:35.790.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	Stephan Mueller
SpeciesList	scientific name: Mus musculus (Mouse); NCBI TaxID: 10090;
ModificationList	acetylated residue; monohydroxylated residue; iodoacetamide derivatized residue
Instrument	timsTOF Pro

Revision	Datetime	Status	ChangeLog Entry
0	2023-07-24 07:09:24	ID requested
1	2023-10-30 02:53:01	announced
⏵ 2	2023-11-14 09:13:41	announced	2023-11-14: Updated project metadata.

Bartos LM, Kirchleitner SV, Kolabas ZI, Quach S, Beck A, Lorenz J, Blobner J, Mueller SA, Ulukaya S, Hoeher L, Horvath I, Wind-Mark K, Holzgreve A, Ruf VC, Gold L, Kunze LH, Kunte ST, Beumers P, Park HE, Antons M, Zatcepin A, Briel N, Hoermann L, Schaefer R, Messerer D, Bartenstein P, Riemenschneider MJ, Lindner S, Ziegler S, Herms J, Lichtenthaler SF, Ert, ü, rk A, Tonn JC, von Baumgarten L, Albert NL, Brendel M, Deciphering sources of PET signals in the tumor microenvironment of glioblastoma at cellular resolution. Sci Adv, 9(43):eadi8986(2023) [pubmed]

submitter keyword: tumor tissue, microglia,tumor associated microglia, SB28 glioblastoma

Stefan F. Lichtenthaler
contact affiliation	DZNE Munich, Neuroproteomics, Feodor-Lynen Str. 17, 81377 Munich, Germany
contact email	stefan.lichtenthaler@dzne.de
lab head
Stephan Mueller
contact affiliation	DZNE Munich Neuroproteomics
contact email	stephan.mueller@dzne.de
dataset submitter

Dataset FTP location NOTE: Most web browsers have now discontinued native support for FTP access within the browser window. But you can usually install another FTP app (we recommend FileZilla) and configure your browser to launch the external application when you click on this FTP link. Or otherwise, launch an app that supports FTP (like FileZilla) and use this address: ftp://ftp.pride.ebi.ac.uk/pride/data/archive/2023/10/PXD044033

PRIDE project URI

• PRIDE
  1. PXD044033
     1. Label: PRIDE project
     2. Name: Proteomics of tumor associated microglia, tumor tissue from SB28 glioblastoma mice, and control microglia