PXD013298

PXD013298 is an original dataset announced via ProteomeXchange.

Title	Quantitative Proteomic Analysis Identifies IGFBP5 as a Secreted Marker for ASCL1High Pulmonary Neuroendocrine Tumors
Description	Lung cancer is the leading cause of cancer death in the United States. Among the various subtypes of lung cancers, pulmonary neuroendocrine (NE) cancer, including small cell lung cancer (SCLC) and NE-non-small cell lung cancer (NE-NSCLC), is a particularly aggressive malignancy that is distinct from classic non–small cell lung cancer (NSCLC) in its metastatic potential and treatment response. Recently, the lineage-specific transcription factors Achaete-scute homolog 1 (ASCL1), NEUROD1, and POU2F3 have been reported to identify heterogeneity in pulmonary NE cancers. These transcription factors bind different genomic loci to regulate distinct gene programs in pulmonary NE cancers. However, the signaling pathways downstream of these transcription factors that distinguish these pulmonary NE cancer subtypes are not well characterized. Regulated protein secretion is critically involved in cell signaling and cell-cell communication events, and is known to be a hallmark associated with pulmonary NE tumors. Using a large-scale mass spectrometric approach, we performed quantitative secretomic analysis 13 cell lines including a pair of isogenic cell lines, i.e., an immortalized human bronchial epithelial cell and an ASCL1high NE NSCLC line. This panel also contained 6 additional ASCL1High and 5 NEUROD1High NE-lung cancer cell lines. From the conditioned media of the 13 cell lines, we identified and quantified 1,626 proteins. The NE-specific secretome is associated with a number of biological processes related to neurodevelopment. Further analysis of the upregulated proteins in ASCL1High subtype NE-lung cancer cells leads to the identification of IGFBP5 being a specific secreted marker for ASCL1High pulmonary NE cancer cells. Furthermore, IGFBP5 is also upregulated in the serum of a genetically modified mouse model of ASCL1High SCLC, as well as in human ASCL1High SCLC tumors. Mechanistically, ASCL1 binds to E-box elements in the IGFBP5 gene and directly regulates its transcription. Knockdown of ASCL1 in SCLC decreases IGFBP5 expression, which, in turn, leads to hyperactivation of the IGF-1R pathway. Pharmacological co-targeting of ASCL1 and IGF-1R signaling results in markedly synergistic, growth inhibitory effects in ASCL1High SCLC both in vitro and in vivo. Together, our quantitative proteomic analysis identifies a novel secreted marker and a new combination therapy for ASCL1High pulmonary NE cancer cells. In addition, we expect that the data sets will serve as an invaluable resource, providing the foundation for future mechanistic studies and biomarker discovery that helps delineate the molecular underpinnings of pulmonary NE tumors.
HostingRepository	PRIDE
AnnounceDate	2024-10-22
AnnouncementXML	Submission_2024-10-22_04:04:21.154.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	Xu-Dong Wang
SpeciesList	scientific name: Homo sapiens (Human); NCBI TaxID: 9606;
ModificationList	TMT6plex-126 reporter+balance reagent acylated residue
Instrument	LTQ Orbitrap Velos

Revision	Datetime	Status	ChangeLog Entry
0	2019-03-29 03:28:12	ID requested
1	2019-07-03 00:03:48	announced
2	2019-08-13 05:27:24	announced	Updated publication reference for PubMed record(s): 31324758.
⏵ 3	2024-10-22 04:04:22	announced	2024-10-22: Updated project metadata.

Wang XD, Hu R, Ding Q, Savage TK, Huffman KE, Williams N, Cobb MH, Minna JD, Johnson JE, Yu Y, Subtype-specific secretomic characterization of pulmonary neuroendocrine tumor cells. Nat Commun, 10(1):3201(2019) [pubmed]

10.1038/s41467-019-11153-5;

submitter keyword: neuroendocrine lung cancer, ASCL1, proteomics and mass spectrometry,secretome, small cell lung cancer

Yonghao Yu
contact affiliation	Department of Biochemistry UT Southwestern Medical Center
contact email	Yonghao.Yu@utsouthwestern.edu
lab head
Xu-Dong Wang
contact affiliation	UT Southwestern Medical Center
contact email	Xu-Dong.Wang@utsouthwestern.edu
dataset submitter

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PRIDE project URI

• PRIDE
  1. PXD013298
     1. Label: PRIDE project
     2. Name: Quantitative Proteomic Analysis Identifies IGFBP5 as a Secreted Marker for ASCL1High Pulmonary Neuroendocrine Tumors