Effects of anti-PD-L1 on the testis transcriptomes of C57BL/6 mice
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ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE171229 | GEO | 2021/10/06
REPOSITORIES: GEO
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Project description:Purpose: To find out the patients who are most sensitive and effective to the anti-PD-L1 and TGF-β bifunctional fusion protein in the treatment of recurrent cervical cancer. Patients and methods: We report two cases of recurrent cervical cancer treated with the anti-PD-L1 and TGF-β bifunctional fusion protein. We described the clinical course, clinical characteristics, and genetic characteristics of the two patients, and analyzed the changes of gene expression in the two patients after treatment. Results: Although PD-L1 expression and HPV status were same in the two patients, the treatment effect of two patients with recurrent cervical cancer was different, according to the evaluation of enhanced computed tomography (CT), one was partial response (PR) and the other was progressive disease (PD), which may indicate that PD-L1 expression and HPV status of patients is not enough to predict the effectiveness of the anti-PD-L1 and TGF-β bifunctional fusion protein treatments. Then, we demonstrated that the changes of peripheral blood lymphocytes of two patients during the treatment had different trends. Moreover, number of alterable genes in PR patient is much greater than that in PD patient, indicating PR patient may be more sensible to the anti-PD-L1 and TGF-β bifunctional fusion protein treatments. Total 4844 genes changing-fate gene set selected which is believed conducting anti-cancer function during the anti-PD-L1 and TGF-β bifunctional fusion protein treatments. Furthermore, we identified that changing-fate genes were correlated with female reproductive organ cancer, infectious disease, inflammatory disease, immune system, indicating these genes may conducting anti-cancer, anti-inflammation and immune function. Conclusion: Anti-PD-L1 and TGF-β bifunctional fusion protein is feasible for the treatment of recurrent cervical cancer. Multi-center, large-sample prospective clinical studies are still needed to further explore the efficacy of anti-PD-L1 and TGF-β bifunctional fusion protein in recurrent cervical cancer and screen appropriate patients, so as to achieve the maximum survival benefit of patients.
2022-10-01 | GSE188305 | GEO
Project description:Purpose: Use RNA-seq to characterize the anti-tumor immune response induced by ALPN-202 and compare to that of anti-PD-L1 treatment alone. Methods: mRNA was isolated from MC38/hPD-L1 tumors 72 hours after a single dose of ALPN-202 (n=4), anti-PD-L1 mAb (durvalumab) (n=4), or Fc control (n=4). Results: ALPN-202 treatment resulted in elevated expression of multiple T cell, NK cell, myeloid cell genes. Additionally, there was a strong increase in genes commonly associated with a proinflammatory response including cytokines, chemokines and surface markers. Conclusions: ALPN-202 treatment resulted in a strong anti-tumor immune response that was more potent than that generated by blockade of PD-L1 alone.
2022-02-10 | GSE161244 | GEO
Project description:Antibodies and derivative drugs targeting immune checkpoints have been approved for the treatment of several malignancies, but there are fewer responses in patients with pancreatic cancer. Here, we designed a nanobody molecule with bi-targeting on PD-L1 and CXCR4, as both targets are overexpressed in many cancer cells and play important roles in tumorigenesis. The nanobody sequences targeting PD-L1 and CXCR4 were linked by the (G4S)3 flexible peptide to construct the anti-PD-L1/CXCR4 bispecific nanobody. The bispecific nanobody was expressed in E. coli cells and purified by affinity chromatography. The purified nanobody was biochemically characterized by mass spectrometry, Western blotting and flow cytometry to confirm the molecule and its association with both PD-L1 and CXCR4. The biological function of the nanobody and its anti-tumour effects were examined.
2023-03-11 | PXD037102 | Pride
Project description:Immune checkpoint blockade (ICB) has shown remarkable efficacy, but in only a minority of cancer patients, suggesting the need to develop additional treatment strategies.We integrated transcriptional profiles of treatment-naïve human tumors and functional CRISPR screens to identify glycometabolism genes with immunomodulatory effects. We identified MAN2A1, encoding an enzyme in N-glycan maturation, as a key immunomodulatory gene. Analyses of public immune checkpoint blockade trial data also suggested a synergy between MAN2A1 inhibition and anti-PD-L1 treatment. Loss of Man2a1 in cancer cells increased their sensitivity to T cell-mediated killing. Man2a1 knockout enhanced response to anti-PD-L1 treatment and facilitated higher cytotoxic T cell infiltration in tumors under anti-PD-L1 treatment. Furthermore, a pharmacological inhibitor of MAN2A1, swainsonine, synergized with anti-PD-L1 in syngeneic melanoma tumor model, whereas each treatment alone had little effect.
2020-08-17 | GSE152925 | GEO
Project description:PD-L1 is a ligand for the inhibitory PD1 receptor on T cells and its expression in some cancers inhibits anti-cancer immune response. In melanoma, PD-L1 expression is induced in response to immune stimuli but in a proportion of melanomas it is constitutively expressed. Factors that drive constitutive expression of PD-L1 are unknown. Here we performed genome-scale methylation analysis of six cell lines that constitutively express PD-L1 (PD-L1 positive, referred to as PD-L1CON) and six cell lines that only express PD-L1 after treatment with IFN- (PD-L1 negative, referred to as PD-L1IND)
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Project description:Checkpoint inhibitors like anti-PD1/PD-L1 have demonstrated significant therapeutic efficacy in a subset of patients partly through reinvigoration of CD8 T cells. However, their impact on myeloid cells remains largely unknown. Here we report that anti-PD-L1 treatment favorably impacts the phenotype and function of tumor macrophages by polarizing the macrophage compartment towards a more pro-inflammatory phenotype. This phenotype was characterized by a decrease in Arginase-I (ARG1) expression and an increase in iNOS, MHCII, and CD40 expression. Whole-transcriptome profiling further confirmed extensive polarization of both tumor monocytes and macrophages from a suppressive to a pro-inflammatory, immuno-stimulatory phenotype. This polarization was driven mainly through IFNγ and was associated with enhanced T cell activity. Transfer of monocytes into anti-PD-L1-treated tumor-bearing mice led to macrophage differentiation into a more pro-inflammatory phenotype, with an increase in CD8 T cells expressing granzyme B and an increase in the CD8/Treg ratio compared to control-treated mice. While in responsive tumor models anti-PD-L1 treatment remodeled the macrophage compartment with beneficial effects on T cells, both macrophage reprogramming and depletion were needed to maximize anti-PD-L1 responses in a tumor immune contexture with high macrophage burden. Our results demonstrate that anti-PD-L1 treatment can favorably remodel the macrophage compartment in responsive tumor models towards a more pro-inflammatory phenotype, mainly through increased IFNγ levels. They also suggest that directly targeting these cells with reprogramming and depleting agents may further augment the breadth and depth of response to anti-PD-L1 treatment in less responsive or more macrophage-dense tumor microenvironments. The "SAMPLE_ID" sample characteristic is a sample identifier internal to Genentech. The ID of this project in Genentech's ExpressionPlot database is NGS1772.
2019-02-12 | GSE125383 | GEO
Project description:PD-L1 is a ligand for the inhibitory PD1 receptor on T cells and its expression in some cancers inhibits anti-cancer immune response. In melanoma, PD-L1 expression is induced in response to immune stimuli but in a proportion of melanomas it is constitutively expressed. Factors that drive constitutive expression of PD-L1 are unknown. Here we performed RNA-Seq analysis of six cell lines that constitutively express PD-L1 (PD-L1 positive, referred to as PD-L1CON) and six cell lines that only express PD-L1 after treatment with IFN- (PD-L1 negative, referred to as PD-L1IND)
2018-05-24 | GSE107620 | GEO
Project description:Only a subset of patients responds to immune checkpoint blockade in melanoma. A preclinical model recapitulating the clinical activity of ICB would provide a valuable platform for mechanistic studies. We used melanoma tumors arising from an Hgftg;Cdk4R24C/R24C genetically engineered mouse (GEM) model to evaluate the efficacy of an anti-mouse PD-L1 antibody similar to the anti-human PD-L1 antibodies durvalumab and atezolizumab. Consistent with clinical observations for ICB in melanoma, anti-PD-L1 treatment elicited complete and durable response in a subset of melanoma-bearing mice. We also observed tumor growth delay or regression followed by recurrence. For early treatment assessment, we analyzed gene expression profiles, T cell infiltration, and T cell receptor (TCR) signatures in regressing tumors compared to tumors exhibiting no response to anti-PD-L1 treatment. We found that CD8+ T cell tumor infiltration corresponded to response to treatment, and that anti-PD-L1 gene signature response indicated an increase in antigen processing and presentation, cytokine-cytokine receptor interaction, and natural killer cell-mediated cytotoxicity. TCR sequence data suggest that an anti-PD-L1-mediated melanoma regression response requires not only an expansion of the TCR repertoire that is unique to individual mice, but also tumor access to the appropriate TCRs. Thus, this melanoma model recapitulated the variable response to ICB observed in patients and exhibited biomarkers that differentiate between early response and resistance to treatment, providing a valuable platform for prediction of successful immunotherapy.
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Project description:Only a subset of patients responds to immune checkpoint blockade in melanoma. A preclinical model recapitulating the clinical activity of ICB would provide a valuable platform for mechanistic studies. We used melanoma tumors arising from an Hgftg;Cdk4R24C/R24C genetically engineered mouse (GEM) model to evaluate the efficacy of an anti-mouse PD-L1 antibody similar to the anti-human PD-L1 antibodies durvalumab and atezolizumab. Consistent with clinical observations for ICB in melanoma, anti-PD-L1 treatment elicited complete and durable response in a subset of melanoma-bearing mice. We also observed tumor growth delay or regression followed by recurrence. For early treatment assessment, we analyzed gene expression profiles, T cell infiltration, and T cell receptor (TCR) signatures in regressing tumors compared to tumors exhibiting no response to anti-PD-L1 treatment. We found that CD8+ T cell tumor infiltration corresponded to response to treatment, and that anti-PD-L1 gene signature response indicated an increase in antigen processing and presentation, cytokine-cytokine receptor interaction, and natural killer cell-mediated cytotoxicity. TCR sequence data suggest that an anti-PD-L1-mediated melanoma regression response requires not only an expansion of the TCR repertoire that is unique to individual mice, but also tumor access to the appropriate TCRs. Thus, this melanoma model recapitulated the variable response to ICB observed in patients and exhibited biomarkers that differentiate between early response and resistance to treatment, providing a valuable platform for prediction of successful immunotherapy.
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