scholarly journals Trends and Challenges in Tumor Anti-Angiogenic Therapies

Cells ◽  
2019 ◽  
Vol 8 (9) ◽  
pp. 1102 ◽  
Author(s):  
József Jászai ◽  
Mirko Schmidt
Keyword(s):  
Solid Tumors ◽  
Survival Rates ◽  
Tumor Hypoxia ◽  
Adaptive Immune System ◽  
Therapy Resistance ◽  
Angiogenic Factors ◽  
Vessel Normalization ◽  
Anti Vegf ◽  
Vessel Maturation ◽  
Tumor Types

Excessive abnormal angiogenesis plays a pivotal role in tumor progression and is a hallmark of solid tumors. This process is driven by an imbalance between pro- and anti-angiogenic factors dominated by the tissue hypoxia-triggered overproduction of vascular endothelial growth factor (VEGF). VEGF-mediated signaling has quickly become one of the most promising anti-angiogenic therapeutic targets in oncology. Nevertheless, the clinical efficacy of this approach is severely limited in certain tumor types or shows only transient efficacy in patients. Acquired or intrinsic therapy resistance associated with anti-VEGF monotherapeutic approaches indicates the necessity of a paradigm change when targeting neoangiogenesis in solid tumors. In this context, the elaboration of the conceptual framework of “vessel normalization” might be a promising approach to increase the efficacy of anti-angiogenic therapies and the survival rates of patients. Indeed, the promotion of vessel maturation instead of regressing tumors by vaso-obliteration could result in reduced tumor hypoxia and improved drug delivery. The implementation of such anti-angiogenic strategies, however, faces several pitfalls due to the potential involvement of multiple pro-angiogenic factors and modulatory effects of the innate and adaptive immune system. Thus, effective treatments bypassing relapses associated with anti-VEGF monotherapies or breaking the intrinsic therapy resistance of solid tumors might use combination therapies or agents with a multimodal mode of action. This review enumerates some of the current approaches and possible future directions of treating solid tumors by targeting neovascularization.

scholarly journals Normalization of the Vasculature for Treatment of Cancer and Other Diseases

2011 ◽  
Vol 91 (3) ◽  
pp. 1071-1121 ◽  
Author(s):  
Shom Goel ◽  
Dan G. Duda ◽  
Lei Xu ◽  
Lance L. Munn ◽  
Yves Boucher ◽  
...  
Keyword(s):  
Clinical Trials ◽  
Solid Tumors ◽  
Tumor Angiogenesis ◽  
Interstitial Fluid ◽  
Tumor Hypoxia ◽  
Fluid Pressure ◽  
Tumor Vasculature ◽  
Interstitial Fluid Pressure ◽  
Vascular Normalization ◽  
Anti Vegf

New vessel formation (angiogenesis) is an essential physiological process for embryologic development, normal growth, and tissue repair. Angiogenesis is tightly regulated at the molecular level. Dysregulation of angiogenesis occurs in various pathologies and is one of the hallmarks of cancer. The imbalance of pro- and anti-angiogenic signaling within tumors creates an abnormal vascular network that is characterized by dilated, tortuous, and hyperpermeable vessels. The physiological consequences of these vascular abnormalities include temporal and spatial heterogeneity in tumor blood flow and oxygenation and increased tumor interstitial fluid pressure. These abnormalities and the resultant microenvironment fuel tumor progression, and also lead to a reduction in the efficacy of chemotherapy, radiotherapy, and immunotherapy. With the discovery of vascular endothelial growth factor (VEGF) as a major driver of tumor angiogenesis, efforts have focused on novel therapeutics aimed at inhibiting VEGF activity, with the goal of regressing tumors by starvation. Unfortunately, clinical trials of anti-VEGF monotherapy in patients with solid tumors have been largely negative. Intriguingly, the combination of anti-VEGF therapy with conventional chemotherapy has improved survival in cancer patients compared with chemotherapy alone. These seemingly paradoxical results could be explained by a “normalization” of the tumor vasculature by anti-VEGF therapy. Preclinical studies have shown that anti-VEGF therapy changes tumor vasculature towards a more “mature” or “normal” phenotype. This “vascular normalization” is characterized by attenuation of hyperpermeability, increased vascular pericyte coverage, a more normal basement membrane, and a resultant reduction in tumor hypoxia and interstitial fluid pressure. These in turn can lead to an improvement in the metabolic profile of the tumor microenvironment, the delivery and efficacy of exogenously administered therapeutics, the efficacy of radiotherapy and of effector immune cells, and a reduction in number of metastatic cells shed by tumors into circulation in mice. These findings are consistent with data from clinical trials of anti-VEGF agents in patients with various solid tumors. More recently, genetic and pharmacological approaches have begun to unravel some other key regulators of vascular normalization such as proteins that regulate tissue oxygen sensing (PHD2) and vessel maturation (PDGFRβ, RGS5, Ang1/2, TGF-β). Here, we review the pathophysiology of tumor angiogenesis, the molecular underpinnings and functional consequences of vascular normalization, and the implications for treatment of cancer and nonmalignant diseases.

scholarly journals Tumor vasculature remolding by thalidomide increases delivery and efficacy of cisplatin

2019 ◽  
Vol 38 (1) ◽  
Author(s):  
Yanwei Shen ◽  
Shuting Li ◽  
Xin Wang ◽  
Mengying Wang ◽  
Qi Tian ◽  
...  
Keyword(s):  
Tumor Growth ◽  
Solid Tumors ◽  
Tumor Model ◽  
Tumor Vasculature ◽  
Angiogenic Factors ◽  
Tumor Vessel ◽  
Tumor Vessels ◽  
Vessel Normalization ◽  
Vascular Physiology ◽  
And Function

Abstract Background A promising strategy to overcome the chemoresistance is the tumor blood vessel normalization, which restores the physiological perfusion and oxygenation of tumor vasculature. Thalidomide (Thal) has been shown to increase the anti-tumor effect of chemotherapy agents in solid tumors. However, it is not yet known whether the synergistic effect of Thal combined with other cytotoxic drugs is attributable to tumor vascular normalization. Methods We used two homograft mice models (4 T1 breast tumor model and CT26 colorectal tumor model) to investigate the effect of Thal on tumor growth, microvessel density, vascular physiology, vascular maturity and function, drug delivery and chemosensitivity. Immunofluorescence, immunohistochemistry and scanning electron microscopy were performed to determine the vessel changes. Protein array assay, qPCR and western blotting were used to detect the molecular mechanism by which Thal regulates tumor vascular. Results Here we report that Thal potently suppressed tumor growth, angiogenesis, hypoxia, and vascular permeability in animal models. Thal also induced a regular monolayer of endothelial cells in tumor vessels, inhibiting vascular instability, and normalized tumor vessels by increasing vascular maturity, pericyte coverage and endothelial junctions. The tumor vessel stabilization effect of Thal resulted in a decrease in tumor vessel tortuosity and leakage, and increased vessel thickness and tumor perfusion. Eventually, the delivery of cisplatin was highly enhanced through the normalized tumor vasculature, thus resulting in profound anti-tumor and anti-metastatic effects. Mechanistically, the effects of Thal on tumor vessels were caused in part by its capability to correct the imbalance between pro-angiogenic factors and anti-angiogenic factors. Conclusions Our findings provide direct evidence that Thal remodels the abnormal tumor vessel system into a normalized vasculature. Our results may lay solid foundation for the development of Thal as a novel candidate agent to maximize the therapeutic efficacy of chemotherapeutic drugs for solid tumors.

The Next Generation of Pattern Recognition Receptor Agonists: Improving Response Rates in Cancer Immunotherapy

2020 ◽  
Vol 27 (34) ◽  
pp. 5654-5674 ◽  
Author(s):  
Daniel H. O’ Donovan ◽  
Yumeng Mao ◽  
Deanna A. Mele
Keyword(s):  
Pattern Recognition ◽  
Immune System ◽  
Cancer Immunotherapy ◽  
Anticancer Agents ◽  
Adaptive Immune System ◽  
Antitumor Effects ◽  
Tlr Agonists ◽  
Recent Success ◽  
Promising Target ◽  
Tumor Types

The recent success of checkpoint blocking antibodies has sparked a revolution in cancer immunotherapy. Checkpoint inhibition activates the adaptive immune system leading to durable responses across a range of tumor types, although this response is limited to patient populations with pre-existing tumor-infiltrating T cells. Strategies to stimulate the immune system to prime an antitumor response are of intense interest and several groups are now working to develop agents to activate the Pattern Recognition Receptors (PRRs), proteins which detect pathogenic and damageassociated molecules and respond by activating the innate immune response. Although early efforts focused on the Toll-like Receptor (TLR) family of membrane-bound PRRs, TLR activation has been associated with both pro- and antitumor effects. Nonetheless, TLR agonists have been deployed as potential anticancer agents in a range of clinical trials. More recently, the cytosolic PRR Stimulator of IFN Genes (STING) has attracted attention as another promising target for anticancer drug development, with early clinical data beginning to emerge. Besides STING, several other cytosolic PRR targets have likewise captured the interest of the drug discovery community, including the RIG-Ilike Receptors (RLRs) and NOD-like Receptors (NLRs). In this review, we describe the outlook for activators of PRRs as anticancer therapeutic agents and contrast the earlier generation of TLR agonists with the emerging focus on cytosolic PRR activators, both as single agents and in combination with other cancer immunotherapies.

scholarly journals The Efficacy of Anti-PD-L1 Treatment in Melanoma Is Associated with the Expression of the ECM Molecule EMILIN2

2021 ◽  
Vol 22 (14) ◽  
pp. 7511
Author(s):  
Albina Fejza ◽  
Maurizio Polano ◽  
Lucrezia Camicia ◽  
Evelina Poletto ◽  
Greta Carobolante ◽  
...  
Keyword(s):  
Gene Expression ◽  
Effective Treatment ◽  
Immune Checkpoint ◽  
Immune Checkpoint Inhibitors ◽  
Checkpoint Inhibitors ◽  
Tumor Hypoxia ◽  
Melanoma Cells ◽  
Vessel Normalization ◽  
Melanoma Patients

The use of immune checkpoint inhibitors has revolutionized the treatment of melanoma patients, leading to remarkable improvements in the cure. However, to ensure a safe and effective treatment, there is the need to develop markers to identify the patients that would most likely respond to the therapies. The microenvironment is gaining attention in this context, since it can regulate both the immunotherapy efficacyand angiogenesis, which is known to be affected by treatment. Here, we investigated the putative role of the ECM molecule EMILIN-2, a tumor suppressive and pro-angiogenic molecule. We verified that the EMILIN2 expression is variable among melanoma patients and is associated with the response to PD-L1 inhibitors. Consistently, in preclinical settings,the absence of EMILIN-2 is associated with higher PD-L1 expression and increased immunotherapy efficacy. We verified that EMILIN-2 modulates PD-L1 expression in melanoma cells through indirect immune-dependent mechanisms. Notably, upon PD-L1 blockage, Emilin2−/− mice displayed improved intra-tumoral vessel normalization and decreased tumor hypoxia. Finally, we provide evidence indicating that the inclusion of EMILIN2 in a number of gene expression signatures improves their predictive potential, a further indication that the analysis of this molecule may be key for the development of new markers to predict immunotherapy efficacy.

scholarly journals The Role of microRNAs in Cholangiocarcinoma

2021 ◽  
Vol 22 (14) ◽  
pp. 7627
Author(s):  
Tingting Shi ◽  
Asahiro Morishita ◽  
Hideki Kobara ◽  
Tsutomu Masaki
Keyword(s):  
Cell Cycle Progression ◽  
Target Genes ◽  
Epithelial Mesenchymal Transition ◽  
Survival Rates ◽  
Therapy Resistance ◽  
Resistance Mechanisms ◽  
Mesenchymal Transition ◽  
Diagnosis And Prognosis ◽  
Related Risk

Cholangiocarcinoma (CCA), an aggressive malignancy, is typically diagnosed at an advanced stage. It is associated with dismal 5-year postoperative survival rates, generating an urgent need for prognostic and diagnostic biomarkers. MicroRNAs (miRNAs) are a class of non-coding RNAs that are associated with cancer regulation, including modulation of cell cycle progression, apoptosis, metastasis, angiogenesis, autophagy, therapy resistance, and epithelial–mesenchymal transition. Several miRNAs have been found to be dysregulated in CCA and are associated with CCA-related risk factors. Accumulating studies have indicated that the expression of altered miRNAs could act as oncogenic or suppressor miRNAs in the development and progression of CCA and contribute to clinical diagnosis and prognosis prediction as potential biomarkers. Furthermore, miRNAs and their target genes also contribute to targeted therapy development and aid in the determination of drug resistance mechanisms. This review aims to summarize the roles of miRNAs in the pathogenesis of CCA, their potential use as biomarkers of diagnosis and prognosis, and their utilization as novel therapeutic targets in CCA.

scholarly journals Hyperbaric oxygen suppressed tumor progression through the improvement of tumor hypoxia and induction of tumor apoptosis in A549-cell-transferred lung cancer

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Shao-Yuan Chen ◽  
Koichi Tsuneyama ◽  
Mao-Hsiung Yen ◽  
Jiunn-Tay Lee ◽  
Jiun-Liang Chen ◽  
...  
Keyword(s):  
Lung Cancer ◽  
Solid Tumors ◽  
Tumor Cells ◽  
Hyperbaric Oxygen ◽  
A549 Cell ◽  
P53 Protein ◽  
Tumor Hypoxia ◽  
A549 Cells ◽  
Xenograft Tumor ◽  
Tumor Models

AbstractTumor cells have long been recognized as a relative contraindication to hyperbaric oxygen treatment (HBOT) since HBOT might enhance progressive cancer growth. However, in an oxygen deficit condition, tumor cells are more progressive and can be metastatic. HBOT increasing in oxygen partial pressure may benefit tumor suppression. In this study, we investigated the effects of HBOT on solid tumors, such as lung cancer. Non-small cell human lung carcinoma A549-cell-transferred severe combined immunodeficiency mice (SCID) mice were selected as an in vivo model to detect the potential mechanism of HBOT in lung tumors. HBOT not only improved tumor hypoxia but also suppressed tumor growth in murine xenograft tumor models. Platelet endothelial cell adhesion molecule (PECAM-1/CD31) was significantly increased after HBOT. Immunostaining of cleaved caspase-3 was demonstrated and apoptotic tumor cells with nuclear debris were aggregated starting on the 14th-day after HBOT. In vitro, HBOT suppressed the growth of A549 cells in a time-dependent manner and immediately downregulated the expression of p53 protein after HBOT in A549 cells. Furthermore, HBOT-reduced p53 protein could be rescued by a proteasome degradation inhibitor, but not an autophagy inhibitor in A549 cells. Our results demonstrated that HBOT improved tissue angiogenesis, tumor hypoxia and increased tumor apoptosis to lung cancer cells in murine xenograft tumor models, through modifying the tumor hypoxic microenvironment. HBOT will merit further cancer therapy as an adjuvant treatment for solid tumors, such as lung cancer.

scholarly journals Is There a Place for Immune Checkpoint Inhibitors in Vulvar Neoplasms? A State of the Art Review

2020 ◽  
Vol 22 (1) ◽  
pp. 190
Author(s):  
Fulvio Borella ◽  
Mario Preti ◽  
Luca Bertero ◽  
Giammarco Collemi ◽  
Isabella Castellano ◽  
...  
Keyword(s):  
Immune Checkpoint ◽  
Immune Checkpoint Inhibitors ◽  
State Of The Art ◽  
Checkpoint Inhibitors ◽  
Early Stage ◽  
Survival Rates ◽  
Younger Women ◽  
Multiple Tumor ◽  
Tumor Types

Vulvar cancer (VC) is a rare neoplasm, usually arising in postmenopausal women, although human papilloma virus (HPV)-associated VC usually develop in younger women. Incidences of VCs are rising in many countries. Surgery is the cornerstone of early-stage VC management, whereas therapies for advanced VC are multimodal and not standardized, combining chemotherapy and radiotherapy to avoid exenterative surgery. Randomized controlled trials (RCTs) are scarce due to the rarity of the disease and prognosis has not improved. Hence, new therapies are needed to improve the outcomes of these patients. In recent years, improved knowledge regarding the crosstalk between neoplastic and tumor cells has allowed researchers to develop a novel therapeutic approach exploiting these molecular interactions. Both the innate and adaptive immune systems play a key role in anti-tumor immunesurveillance. Immune checkpoint inhibitors (ICIs) have demonstrated efficacy in multiple tumor types, improving survival rates and disease outcomes. In some gynecologic cancers (e.g., cervical cancer), many studies are showing promising results and a growing interest is emerging about the potential use of ICIs in VC. The aim of this manuscript is to summarize the latest developments in the field of VC immunoncology, to present the role of state-of-the-art ICIs in VC management and to discuss new potential immunotherapeutic approaches.

scholarly journals Bivalent Genes Targeting of Glioma Heterogeneity and Plasticity

2021 ◽  
Vol 22 (2) ◽  
pp. 540
Author(s):  
Mariam Markouli ◽  
Dimitrios Strepkos ◽  
Kostas A. Papavassiliou ◽  
Athanasios G. Papavassiliou ◽  
Christina Piperi
Keyword(s):  
Gene Expression ◽  
Cancer Progression ◽  
Integration Site ◽  
Survival Rates ◽  
Family Members ◽  
Therapy Resistance ◽  
Cellular Functions ◽  
Cns Neoplasms ◽  
Development Regulation

Gliomas account for most primary Central Nervous System (CNS) neoplasms, characterized by high aggressiveness and low survival rates. Despite the immense research efforts, there is a small improvement in glioma survival rates, mostly attributed to their heterogeneity and complex pathophysiology. Recent data indicate the delicate interplay of genetic and epigenetic mechanisms in regulating gene expression and cell differentiation, pointing towards the pivotal role of bivalent genes. Bivalency refers to a property of chromatin to acquire more than one histone marks during the cell cycle and rapidly transition gene expression from an active to a suppressed transcriptional state. Although first identified in embryonal stem cells, bivalent genes have now been associated with tumorigenesis and cancer progression. Emerging evidence indicates the implication of bivalent gene regulation in glioma heterogeneity and plasticity, mainly involving Homeobox genes, Wingless-Type MMTV Integration Site Family Members, Hedgehog protein, and Solute Carrier Family members. These genes control a wide variety of cellular functions, including cellular differentiation during early organism development, regulation of cell growth, invasion, migration, angiogenesis, therapy resistance, and apoptosis. In this review, we discuss the implication of bivalent genes in glioma pathogenesis and their potential therapeutic targeting options.

Abstract WP131: Effects Of EDAS Surgery On The Circulating Angiogenic Factors Of Patients With Moyamoya And Intracranial Atherosclerosis.

Stroke ◽  
2016 ◽  
Vol 47 (suppl_1) ◽  
Author(s):  
Nestor R Gonzalez ◽  
Juan F Toscano ◽  
Raymond Liou ◽  
Neal Rao ◽  
Jason D Hinman ◽  
...  
Keyword(s):  
Mixed Models ◽  
Angiogenic Factors ◽  
Intracranial Atherosclerosis ◽  
Control Groups ◽  
Prospective Longitudinal Study ◽  
Cranial Surgery ◽  
Tumor Pathology ◽  
Vessel Maturation ◽  
And Control ◽  
Prospective Longitudinal

Objective: To evaluate the levels of circulating angiogenic factors in patients with moyamoya disease (MMD), intracranial atherosclerosis (ICAS), and controls, and the effects of EDAS in their levels. Methods: Prospective longitudinal study of angiogenic factors in 22 patients with MMD, ICAS, and controls. Patients with MMD and ICAS underwent EDAS surgery. Control cases had cranial surgery for non-vascular or tumor pathology. Angiogenic factors were measured at baseline and 7 days after surgery. Log-corrected levels were compared between groups. Multivariate analysis of variance (MANOVA) was used to examine differences within pairs and between groups. Regression mixed models were built to account for intrasubject correlation and evaluate the association of angiogenic levels with group and treatment. Results: Mean age was 41 ± 11 in MMD, 65 ± 16 in ICAS, and 51 ± 19 in controls. There were 83% females in the MMD group, 44% in ICAS, and 43% in controls. Patients with MMD had significantly higher levels of PDGFAA (568.8 pg/ml), vs ICAS (165.9pg/mL), and controls (38.4 pg/mL) p=0.007; PDGFBB (1449.7 pg/mL), vs. ICAS (141.2 pg/mL), and controls (65.2 pg/mL) p=0.03; TGFB1 (24.5 ng/mL), vs. ICAS (13.8 ng/mL), and controls (6.2 ng/mL) p=0.006; TSP1 (128.5 ng/mL), vs. ICAS (91.7 ng/mL), and controls (9 ng/mL) p=0.0007. After surgery (EDAS for MMD and ICAS vs. cranial surgery for controls) levels of PDGFAA, PDGFBB, and TGFB1 increased on the ICAS and control groups eliminating the baseline differences. EDAS, independently from etiology, affected the levels of pro-angiogenic TGFB2 (EDAS: 290 pg/mL, controls: 161 pg/mL), and BMP2 (EDAS: 153 pg/mL, controls: 109 pg/mL) p<0.02. EDAS also increased the levels of the anti-angiogenic TSP2 (EDAS: 54.5 ng/mL, controls: 29 ng/mL) p=0.02. Conclusion: Patients with MMD have baseline higher levels of pro-angiogenic factors PDGFAA, PDGFBB, and TGFB1, involved in vessel maturation. EDAS, independent from etiology, affected the levels of TGFB2, BMP2 and TSP2, cytokines involved in vessel maturation, increased vascular permeability, and modulation of cell migration, respectively.

scholarly journals 368 Consistent pattern of immune activation induced by oncolytic adenovirus ONCOS-102 across diverse types of solid tumors

2021 ◽  
Vol 9 (Suppl 3) ◽  
pp. A396-A396
Author(s):  
Lukasz Kuryk ◽  
Anne-Sophie Moller ◽  
Sandeep Kumar ◽  
Alexander Shoushtari ◽  
Luis Paz Ares ◽  
...  
Keyword(s):  
T Cells ◽  
T Cell ◽  
Solid Tumors ◽  
T Cell Activation ◽  
Cd8 T Cells ◽  
Cell Activation ◽  
Clinical Importance ◽  
Oncolytic Adenovirus ◽  
Link Type ◽  
Tumor Types

BackgroundSolid tumors exhibit highly variable compositions of immune infiltrates. Therapeutic compounds driving uniform remodeling of tumor microenvironment (TME) across tumor types may improve the efficacy of cancer immunotherapy. ONCOS-102, a granulocyte-macrophage colony stimulating factor (GM-CSF)-expressing oncolytic adenovirus (Ad5/3-D24-GMCSF), was tested for its safety, therapeutic efficacy and capacity to remodel TME in recently completed phase I/II clinical studies in anti-PD-1 refractory melanoma (NCT03003676) and malignant pleural mesothelioma (MPM) (NCT02879669).MethodsBiopsies were obtained from tumor lesions of patients treated with intra-tumoral injections of ONCOS-102 in combination with chemotherapy or pembrolizumab for MPM and melanoma, respectively. Tumor immune infiltrates were analyzed by immunohistology using several antibody panels. On-treatment biopsies were compared to paired baseline samples as wells as to samples from control patients treated with chemotherapy alone in the case of MPM. Gene expression data obtained by next generation RNA sequencing were used to complement the immunohistology analysis and all results were correlated to clinical outcomes.ResultsComparative TME analysis of anti-PD-1 refractory melanoma and MPM tumors revealed noticeably lower baseline T-cell infiltration in mesothelioma. Thus, fractions of CD8+ T-cells were significantly below 10% in 80% of MPM biopsies while approaching or exceeding this level in 60% of melanoma baseline samples. Comparison of tumor biopsies obtained at baseline or on-treatment, demonstrated increased infiltration by both CD4+ and CD8+ T-cells in large proportions of melanoma (CD4+: 13/20 (65%); CD8+: 16/19 (84%) and MPM (CD4+: 10/15 (67%); CD8+: 9/15 (60%) tumor lesions in response to ONCOS-102. Frequencies of cytotoxic T-cells with high granzyme-B expression also increased in response to the treatment in both tumor types, in particular when assessed as percentage of total CD8+ T-cells. Other observed changes induced by ONCOS-102 in samples taken from CR, PR and SD patients with MPM or melanoma included increased CD8/Treg ratio and modulation of PD-L1 expression. Biological and clinical importance of these findings was further supported by correlation between modulation of several subsets of genes related to the process of T-cell activation, such as cytotoxic granule components and co-stimulatory molecules, and clinical response to ONCOS-102 in melanoma and both tumor response and overall survival in MPM patients.ConclusionsONCOS-102 drives pro-inflammatory modulation of immune TME across tumor types of different origins, anatomical locations and immunological baseline characteristics. Our data support potential of ONCOS-102 to serve as a potent immune sensitizing agent in combination therapies with various classes of immunomodulatory compounds and chemotherapy.

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