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Anchoring Filament Protein Ladinin-1 is an Immunosuppressive Microenvironment and Cold Tumor Correlated Prognosticator in Lung Adenocarcinoma

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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

References

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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.

Funding

The authors declare that no funds, grants, or other support were received during the preparation of this manuscript.

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Authors

Contributions

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.

Corresponding author

Correspondence to Shuang Xian.

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The authors have no relevant financial or non-financial interests to disclose.

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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

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