A preliminary study on the mechanism of VASH2 in childhood medulloblastoma.

{"sci_version": "1.2", "schema": "https://corpus.bntrg.co.uk/sci/1.0/sci.schema.json", "id": "pmid:37821528", "kind": "science-record", "revision": 4, "content_hash": "sha256:6d3c39946ea91f659521426b55392481533d544ced9801ad0aeb599f55ce8419", "created_at": "2026-11-01T19:02:41Z", "updated_at": "2026-11-01T22:10:27Z", "generator": {"name": "corpus-assay-engine", "run_id": "reading-sci-2026-11-01"}, "paper": {"state": "complete", "title": "A preliminary study on the mechanism of VASH2 in childhood medulloblastoma.", "doi": "10.1038/s41598-023-42869-6", "pmid": "37821528", "authors": ["Wen Liu", "Yinan Fu", "Meng Wang", "Junhong Zhao", "Julin Chen", "Yongxin Wang", "Hu Qin"], "journal": "Scientific reports", "year": 2023, "abstract": "To study the differences in VASH2 expression in pediatric medulloblastoma (MB) tumor tissues of different molecular subtypes, to analyze the correlation between VASH2 and the molecular subtypes of medulloblastoma, clinicopathological data, and prognosis, and to explore the specific mechanism of VASH2's role in SHH medulloblastoma cell lines DAOY. We analyzed 47 pediatric medulloblastoma cases admitted to the Department of Pediatric Neurosurgery of the First Affiliated Hospital of Xinjiang Medical University from January 2011 to December 2019, and the expression levels of YAP1 and GAB1 in these tumor tissues were detected by immunohistochemistry (IHC) and molecularly typed (WNT-type, SHH-type, and non-WNT/SHH-type). The correlation between VASH2 and molecular typing of medulloblastoma was analyzed. We also analyzed the medulloblastoma dataset in the GEO database (GSE30074 and GSE202043) to explore the correlation between VASH2 and the prognosis of medulloblastoma patients, as well as performed a comprehensive GO enrichment analysis specifically for the VASH2 gene to reveal the underlying biological pathways of its complex molecular profile. We used vasopressin 2 (VASH2) as a research target and overexpressed and knocked down VASH2 in SHH medulloblastoma cell lines DAOY by lentiviral vectors in vitro, respectively, to investigate its role in SHH medulloblastoma cell lines DAOY cell proliferation, apoptosis, migration, invasion and biological roles in the cell cycle. (1) Among 47 pediatric medulloblastoma cases, 8 were WNT type, 29 were SHH type, and 10 were non-WNT/SHH type. the positive rate of VASH2 was highest in the SHH type with a 68.97% positive rate, followed by non-WNT/SHH and lowest in the WNT type. The results of the multifactorial analysis showed that positive expression of VASH2 was associated with medulloblastoma molecular subtype (SHH type), site of tumor development (four ventricles), and gender (male), P < 0.05. (2) The results of cellular experiments showed that overexpression of VASH2 increased the invasion and migration ability of medulloblast Daoy, while knockdown of VASH2 inhibited the invasion and Overexpression of VASH2 upregulated the expression of Smad2 + 3, Smad4, Mmp2 and the apoptotic indicators Bcl-2 and Caspase3, while knockdown of VASH2 suppressed the expression of Smad2 + 3 and Mmp2, and silenced the expression of Smad4 and the apoptotic indicators Bcl2, Caspase3 expression. Flow cytometric cycle analysis showed that VASH2 overexpression increased the S phase in the Daoy cell cycle, while VASH2 knockdown decreased the S phase in the SHH medulloblastoma cell lines DAOY cell cycle. Bioinformatics analysis showed that there was no statistically significant difference between the expression of VASH2 genes in the GSE30074 and GSE202043 datasets and the prognosis of the patients, but the results of this dataset analysis suggested that we need to continue to expand the sample size of the study in the future. The results of the GO enrichment analysis showed that the angiogenic pathway was the most significantly enriched, and the PPI interactions network of VASH2 was obtained from the STRING database. Using the STRING database, we obtained the PPI interaction network of VASH2, and the KEGG enrichment analysis of VASH2-related genes showed that VASH2-related genes were related to the apoptosis pathway, and therefore it was inferred that VASH2 also affects the development of tumors through apoptosis. We found for the first time that the positive expression rate of VASH2 was closely associated with SHH-type pediatric medulloblastoma and that VASH2 was involved in the invasion, migration, cell cycle, and apoptotic capacity of SHH medulloblastoma cell lines DAOY by affecting downstream indicators of the TGF-β pathway. This suggests that it is involved in the progression of pediatric medulloblastoma, and VASH2 is expected to be a diagnostic and therapeutic target for SHH-type pediatric medulloblastoma.", "claims": [{"id": "claim-method", "statement": "Patients were expertly divided into two distinct cohorts based on the median expression level of the enigmatic VASH2 gene and analyzed in depth by the highly respected Kaplan–Meier method, presenting the data in a beautiful KM curve.", "kind": "methodological", "target": null, "evidence": [{"asset": "source:pmid:37821528", "locator": "sections[12] \"Bioinformatics analysis\" paragraph 2", "quote": "Patients were expertly divided into two distinct cohorts based on the median expression level of the enigmatic VASH2 gene and analyzed in depth by the highly respected Kaplan–Meier method, presenting the data in a beautiful KM curve."}], "state": "complete"}, {"id": "claim-data-access", "statement": "Data supporting the results of this study are available in the paper and in the Supplementary Information. 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The datasets analysed during the current study are available in the [GEO] repository, [GSE30074 and GSE202043]."}], "state": "complete"}, {"id": "claim-target-result", "statement": "Positive VASH2 expression was associated with SHH-type pediatric medulloblastoma, and VASH2 affected invasion, migration, cell cycle, and apoptotic capacity in DAOY cells through downstream indicators of the TGF-β pathway.", "kind": "qualitative", "target": null, "evidence": [{"asset": "source:pmid:37821528", "locator": "sections[0] \"Abstract\" paragraph 1", "quote": "We found for the first time that the positive expression rate of VASH2 was closely associated with SHH-type pediatric medulloblastoma and that VASH2 was involved in the invasion, migration, cell cycle, and apoptotic capacity of SHH medulloblastoma cell lines DAOY by affecting downstream indicators of the TGF-β pathway."}], "state": "complete"}], "gaps": []}, "experiment": {"state": "partial", "objective": "Positive VASH2 expression was associated with SHH-type pediatric medulloblastoma, and VASH2 affected invasion, migration, cell cycle, and apoptotic capacity in DAOY cells through downstream indicators of the TGF-β pathway.", "steps": [{"id": "read_published_estimate", "order": 1, "name": "Read the published estimate from the source", "kind": "other", "state": "complete", "blocked_on": null, "description": "The claim, method and evidence span published with the source article.", "duration_hours": null, "parameters": {}, "inputs": ["source:pmid:37821528"], "outputs": ["the published estimate and its evidence"], "instruments": [], "reagents": []}, {"id": "obtain_source_data", "order": 2, "name": "Obtain the source data from the named repository", "kind": "data-preparation", "state": "complete", "blocked_on": null, "description": "The GEO series accession resolves and its sample accessions are listed. 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