Abstract
Anchoring filament protein ladinin-1 (LAD1) codes for an anchor filament protein in the basement membrane. Here, we have aimed to determine its potential role in LUAD. According to the comprehensive analyses conducted in this study, we studied the expression, prognostic significance, function, methylation, copy number variations, and the immune cell infiltration of LAD1 in LUAD. A higher level of LAD1 gene expression was observed in the LUAD tumor tissues compared to the normal lung tissues (p < 0.001). Furthermore, the multivariate analysis indicated that a higher LAD1 gene expression level was the independent prognostic factor. Additionally, the DNA methylation level of the LAD1 was inversely linked to its expression (p < 0.001). We noted that the patients affected due to LAD1 hypomethylation showed a very low overall survival rate compared to the patients with a higher LAD1 methylation score (p < 0.05). Moreover, the results of the immunity analysis indicated that the LAD1 expression might be inversely linked to the immune cell infiltration degree, expression of the infiltrated immune cells, and the PD-L1 levels. Lastly, we supplemented some verification to increase the rigor of the study. The results suggested that high expression of LAD1 may be related to cold tumors. Hence, this indirectly reflects that the immunotherapy effect of LUAD patients with high LAD1 expression might be worse. Based on the role played by the LAD1 in the tumor immune microenvironment, it can be considered a potential biomarker for predicting the immunotherapy response to LUAD.
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Data Availability
The datasets generated and/or analysed during the current study are available in the public databases, including the UCSC Xena browser (https://xenabrowser.Net/datapages/), the GEO database (https://www.ncbi.nlm.nih.gov/), the Human Protein Atlas (https://www.proteinatlas.org), the TIMER (https://cistrome.shinyapps.io/timer/), the TIMER2.0 software (https://timer.cistrome.org/) the Oncomine database (www.oncomine.org), the cBioPortal (https://www.cbioportal.org/), the MethSurv (https://biit.cs.ut.ee/methsurv/), the UALCAN (http://ualcan.path.uab.edu/), the GEPIA (http://gepia.cancer-pku.cn/index.html), and The TISIDB (http://cis.hku.hk/TISIDB/index.php). The code used for analysis in the manuscript was provided in the Supplementary Information file.
Abbreviations
- LAD1 :
-
Anchoring filament protein ladinin-1
- LUAD:
-
Lung adenocarcinoma
- NSCLC:
-
Non-small cell lung cancer
- LUSC:
-
Lung squamous cell carcinoma
- OS:
-
Overall survival
- TCGA:
-
The Cancer Genome Atlas
- GEO:
-
Gene Expression Omnibus
- ROC:
-
Receiver operating characteristic
- GSEA:
-
Gene set enrichment analysis
- NOS:
-
Not otherwise specified
- MSigDB:
-
Molecular Signatures Database
- NES:
-
Normalized enrichment score
- FDR:
-
False discovery rate
- ssGSEA:
-
Single-sample Gene Set Enrichment Analysis
- DEGs:
-
Differentially expressed genes
- EGFR :
-
Epithelial growth factor receptor
- Mut:
-
Mutation type
- Wt:
-
Wild type
- ALK :
-
Anaplastic lymphoma kinase
- KRAS :
-
Kirsten rat sarcoma viral oncogene
- HR:
-
Hazard ratio
- CI:
-
Confidence interval
- TPR:
-
True positive rate
- FPR:
-
False positive rate
- ICIs:
-
Immune checkpoint inhibitors
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Acknowledgements
We sincerely thank the public databases, including TCGA, UCSC Xena, GEO, Oncomine, HPA, TIMER, TIMER2.0, cBioPortal, GEPIA, UALCAN, TISIDB, and MethSurv for providing open access.
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All authors contributed to the study conception and design. KY, YPZ and SX designed this study. KY, YPZ, YLY and YJX contributed to the data collection. KY, YPZ and YLY analyzed the data. SX supervised the study. KY, YPZ, YLY and YJX wrote the manuscript. All authors read and approved the final manuscript.
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Yuan, K., Zhang, Y., Yu, Y. et al. Anchoring Filament Protein Ladinin-1 is an Immunosuppressive Microenvironment and Cold Tumor Correlated Prognosticator in Lung Adenocarcinoma. Biochem Genet 61, 2173–2202 (2023). https://doi.org/10.1007/s10528-023-10370-4
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DOI: https://doi.org/10.1007/s10528-023-10370-4