Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Knockdown of the Prolactin Receptor Inhibits Recruitment of Tregs and their Promotion of EMT in a Syngeneic Breast Cancer Model

ABSTRACT: The clinical relevance and prognostic significance of tumor-infiltrating Tregs in different types of cancers makes them appealing therapeutic targets. However, while effective at inhibiting cancer progression, immunotherapeutics targeting Treg function have adverse effects in a substantial proportion of patients, ranging from mild inflammatory disorders to frank autoimmune disease. Here, we report that systemic knockdown of the long form of the prolactin receptor (LFPRLR) inhibits recruitment of Tregs to primary tumors and, importantly, metastasis-promoting activities of tumor Tregs, with no change in the production of TGFβ or IL-10 by tumor Tregs or the ability of peripheral Tregs to suppress anti-CD3/CD28-stimulated effector cell proliferation. Knockdown of the LFPRLR was accomplished using a derivatized DNA splice-modulating oligomer and outcome was assessed in the highly-metastatic, syngeneic, orthotopic 4T1-Balb/c immune-competent breast cancer model. We conclude that knockdown of the LFPRLR produces a more functionally-specific anti-cancer effect in Tregs, suggesting promise as a future therapeutic approach.

ORGANISM(S): Mus musculus

PROVIDER: GSE111329 | GEO | 2019/02/28

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Similar Datasets

Knockdown of the Prolactin Receptor Inhibits Recruitment of Tregs and their Promotion of EMT in a Syngeneic Breast Cancer Model

Project description:Knockdown of the Prolactin Receptor Inhibits Recruitment of Tregs and their Promotion of EMT in a Syngeneic Breast Cancer Model

| PRJNA436638 | ENA

Immunoproteomics of Lymph Node T-cells in Bladder Cancer

Project description:The immune-suppressive features often possessed by invasive tumors hamper effective anti-tumor immunity. In this context, tumor-infiltrating regulatory T cells (Tregs) have been widely implied, principally as unwanted suppressors of anti-tumor immune responses. However, while many studies have focused on tumor-infiltrating Tregs, the function and signaling of Tregs in tumor-associated lymph nodes is largely unknown. In this study, we set out to clarify how immune signaling in lymph nodes is impacted by its contact to the tumour. Because muscle-invasive urothelial bladder cancer (MIBC) represent an immunogenic cancer were Tregs are accumulated and sentinel nodes (SNs) can be efficiently detected, we explored the protein expression of T-cells in SNs and non-SNs of MIBC patients. Proteomic analysis of Tregs and effector T-cells in SN and non-draining lymph nodes found SN-Tregs in MIBC patients to up-regulate growth and immune signaling pathways, the cytokine IL-16 being central in the signaling network. Experimental validation showed that in Tregs, tumoral factors increase IL-16 processing into bioactive forms and increase FOXP3 expression. In conclusion, altered IL-16 processing caused by tumour-released factors stimulate expansion of SN-Tregs in MIBC, creating an immunosuppressive environment and contributing to immune escape.

2020-09-09 | PXD009569 | Pride

Prolactin enhances T regulatory cell promotion of breast cancer through the long form prolactin receptor.

Project description: Not available

| S-EPMC8358703 | biostudies-literature

Tumor invasion in draining lymph nodes is associated with Treg accumulation in breast cancer patients

Project description:Tumor-draining lymph node (TDLN) invasion by metastatic cells in breast cancer correlates with poor prognosis and is associated with local immunosuppression, which can be partly mediated by regulatory T cells (Tregs). Here, we study Tregs from matched tumor-invaded and non-invaded TDLNs, and breast tumors. We observe that Treg frequencies increase with nodal invasion, that Tregs express higher levels of co-inhibitory/stimulatory receptors than effector cells. Also, while Tregs show conserved suppressive function in TDLN and tumor, conventional T cells (Tconvs) in TDLNs proliferate and produce Th1-inflammatory cytokines, but are dysfunctional in the tumor. We describe a common transcriptomic signature shared by Tregs from tumors and nodes, including CD80, which is significantly associated with poor patient survival. TCR RNA-sequencing analysis indicates trafficking between TDLNs and tumors and ongoing Tconv/Treg conversion. Overall, TDLN Tregs are functional and express a distinct pattern of druggable co-receptors, highlighting their potential as targets for cancer immunotherapy.

2020-05-26 | E-MTAB-9112 | biostudies-arrayexpress

mRNA-based precision targeting of neoantigens and tumor-associated antigens in malignant brain tumors

Project description:mRNA-based immunotherapeutics have garnered widespread interest for their potential to revolutionize cancer treatment. In this study, we have established a personalized and customizable mRNA-therapeutic approach that effectively targets a plurality of tumor antigens and demonstrated potent anti-tumor response in preclinical brain tumor models. Our platform uniquely addresses the challenge of tumor heterogeneity and low antigen burden, two key deficiencies in targeting classically immunotherapy-resistant CNS malignancies.

2024-01-25 | GSE252247 | GEO

mRNA-based precision targeting of neoantigens and tumor-associated antigens in malignant brain tumors [KR158 RNA-TCR]

2024-01-25 | GSE251800 | GEO

mRNA-based precision targeting of neoantigens and tumor-associated antigens in malignant brain tumors [KR158 RNA-Seq]

2024-01-25 | GSE251799 | GEO

mRNA-based precision targeting of neoantigens and tumor-associated antigens in malignant brain tumors [GL261 RNA-Seq]

2024-01-25 | GSE251798 | GEO

Single-cell RNA sequencing reveals the transcriptomic characteristics of Tregs and TNFR2+ Tregs isolated from tumor tissues and peripheral blood of patients with gastric cancer

Project description:This study aimed to explore the characteristics and role of TNFR2+ Tregs in the microenvironment and progression of gastric cancer by single-cell RNA sequencing.We obtained Tregs from tumor tissues and peripheral blood of three GC patients.Through single-cell RNA sequencing, we found tumor-infiltrating Tregs express high levels of TNFR2. The TNF-a/TNFR2 signaling pathway is activated, accompanied by upregulation of costimulatory molecules. Compared to blood Tregs, tumor-infiltrating Tregs exhibit activated and effector states. In addition to expressing costimulatory molecules such as TNFR2, 4-1BB, OX40 and GITR, tumor-infiltrating Tregs are also characterized by high expression of immune checkpoints such as CTLA-4 and TIGIT and chemokines such as CCR6.This study revealed a high infiltration level of TNFR2+ Tregs with the characteristics of activated and effector Tregs in the tumor microenvironment. Our study provides a new theoretical basis for TNFR2+ Tregs as a therapeutic target in gastric cancer.

2021-04-16 | GSE172131 | GEO

Targeting EZH2 reprograms intratumoral regulatory T cells to enhance cancer immunity

Project description:Regulatory T cells (Tregs) are critical for maintaining immune homeostasis, but their presence in tumor tissues impairs anti-tumor immunity and portends poor prognoses in cancer patients. Here we reveal a mechanism to selectively target and reprogram the function of tumor-infiltrating Tregs (TI-Tregs) by exploiting their dependency for the histone H3K27 methyltransferase Enhancer of Zeste Homolog 2 (EZH2) in tumors. Disruption of EZH2 activity in Tregs, either pharmacologically or genetically, drove the acquisition of pro-inflammatory functions in TI-Tregs, remodeling the tumor microenvironment and enhancing the recruitment and function of CD8+ and CD4+ effector T cells that eliminate tumors. Moreover, abolishing EZH2 function in Tregs was mechanistically distinct from, more potent than, and less toxic than a generalized Treg depletion approach. This study reveals a novel strategy to target Tregs in cancer that mitigates autoimmunity by reprogramming their function in tumors to enhance anti-cancer immunity.

2018-06-01 | GSE114298 | GEO

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data