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Deciphering CD59: Unveiling Its Role in Immune Microenvironment and Prognostic Significance.

Bhaumik Patel¹, Ashok Silwal¹, Mohamed Ashraf Eltokhy¹

¹Department of Immunotherapeutic and Biotechnology, Texas Tech University Health Science Center, Abilene, TX 79601, USA.

|November 9, 2024

Summary

CD59 protein is highly expressed in several cancers, correlating with poor patient survival and immune evasion. Its association with regulatory T cells and M2 macrophages suggests a role in tumor progression, except in kidney renal cell carcinoma.

Keywords:

CD59 complements immune evasion immune suppression overall survival

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Area of Science:

Immunology
Oncology
Molecular Biology

Background:

CD59 is a membrane protein that inhibits complement-dependent cytotoxicity by preventing membrane attack complex formation.
Overexpression of CD59 in solid tumors aids cancer cells in evading immune surveillance.
The specific roles of CD59 in cancer growth and immune evasion require further investigation.

Purpose of the Study:

To analyze CD59 expression patterns in various cancers.
To determine the prognostic significance of CD59.
To investigate the association between CD59 and immune cell infiltration in the tumor microenvironment.

Main Methods:

Utilized The Cancer Genome Atlas (TCGA) and public databases for expression and survival analysis.
Analyzed CD59 association with immune cell infiltration (Treg, MDSC, M2 macrophages) in the tumor microenvironment (TME).
Validated findings using in vitro cell-line experimental data.

Main Results:

CD59 is abundantly expressed in cervical squamous cell carcinoma (CESC), kidney renal cell carcinoma (KIRC), glioblastoma multiforme (GBM), head and neck squamous cell carcinoma (HNSC), and stomach adenocarcinoma (STAD).
CD59 expression significantly impacts overall survival (OS) in CESC, GBM, HNSC, and STAD.
CD59 correlates with regulatory T cells (Treg), myeloid-derived suppressor cells (MDSC), and M2 tumor-associated macrophages (TAMs) in the TME, often associated with poor prognosis via pathways like IL10/pSTAT3 and TGFβ1, suppressing cytotoxic T cell activity.

Conclusions:

CD59 expression is linked to unfavorable prognosis in CESC, GBM, HNSC, and STAD due to its correlation with immune-suppressive cells.
Conversely, CD59 expression shows a favorable prognosis in KIRC.
CD59's interaction with immune cells in the TME is a critical determinant of patient outcomes in various cancers.