Multiple Tyrosine Kinase Inhibitor Research Articles

Limited benefit from the addition of immunotherapy to chemotherapy in TKI-refractory EGFR-mutant lung adenocarcinoma.

e21169 Background: The benefit of adding immunotherapy to chemotherapy in EGFR-mutant lung adenocarcinoma (LUAD) with acquired resistance to EGFR tyrosine kinase inhibitors (TKIs) is not fully investigated. This study aimed to explore the outcomes of immunotherapy combinations in such population in a real-world setting. Methods: This retrospective analysis included patients with EGFR-mutant LUAD who progressed on EGFR TKIs and received subsequent therapy with chemotherapy (chemo; n = 84), chemotherapy with immunotherapy (chemoIO; n = 30), chemotherapy plus bevacizumab with or without IO (withBev; n = 42), and IO monotherapy (IO-mono; n = 22). Clinical progression-free survival (cPFS) from the start of the therapy to discontinuation was assessed. Associations of clinical characteristics with cPFS were evaluated using univariable and adjusted Cox regression models. Results: A total of 178 patients (mean age = 62.6; 57.9% females) with a median cPFS (mcPFS) of 4.9 (95% CI: 4.4-5.4) months with 162 (91%) progression events. There was no difference in cPFS between chemoIO vs chemo groups (5.3 months vs 4.8, P = 0.8). Compared to the chemo group, patients who were treated withBev trended towards better PFS (6.1 months vs 4.8; P = 0.3; HR 0.79; 95% CI: 0.52-1.20;), while patients with IO-mono had inferior PFS (2.2 months; P = 0.001; HR 2.22; 95% CI: 1.37-3.59). Patients who were administered one-line of TKI prior to subsequent therapy acquired better PFS when compared to those with multiple prior TKIs (5.2 months vs 4.5; P = 0.011; HR 0.66; 95% CI: 0.48-0.91). The significance remained the same after adjusted by other clinicopathological variables including post-TKI treatment strategies and metastatic status (P = 0.005). Furthermore, among the chemoIO group, patients with PD-L1 expression had better PFS (n = 15, 7.7 months vs 4.5, P = 0.04; HR 0.36; 95% CI: 0.13-0.96) than those without PD-L1 expression (n = 6). However, PD-L1 was not associated with PFS among the patients treated with chemoIO plus bevacizumab. Brain or liver metastases were associated with worse PFS. Conclusions: Immunotherapy adds limited benefit when combined with chemotherapy in TKI-refractory EGFR-mutant LUAD. Chemotherapy +/- bevacizumab are reasonable treatment options for these patients.

An evaluation of ponatinib as a therapy in adult patients with resistant/intolerant chronic-phase chronic myeloid leukemia

Introduction: Chronic myeloid leukemia is now a highly treatable leukemia due to the availability of multiple tyrosine kinase inhibitors (TKIs) inhibiting the BCR-ABL1 oncogene. Some patients with CML can display resistance or intolerance to multiple TKIs, oftentimes due to the presence of mutations in BCR-ABL1, such as T315I, which limits effective treatment options. Ponatinib is a third-generation, rationally-designed TKI with clinically meaningful activity in this difficult-to-treat population. Ponatinib is associated with an increased risk of arterial occlusive events (AOEs) which has required a re-examination of its dosing in order to limit the risk of these events. Areas covered: This review will provide an overview of the mechanism of action of ponatinib and the safety and efficacy data from clinical trials in chronic myeloid leukemia Expert opinion: Ponatinib is a potent pan-BCR-ABL1 TKI with substantial activity in patients with more resistant or advanced CML. Its efficacy needs to be balanced with the increased risk of vascular events, which seems to be at least partially diminished by the implementation of mitigation strategies aimed at modifying cardiovascular risk factors and adaptive dosing of the drug.

Systemic Therapy in Metastatic Hepatocellular Carcinoma

Multiple new tyrosine kinase inhibitors, immunotherapies and anti-angiogenic therapies are now available for the treatment of advanced hepatocellular carcinoma (HCC). In this article, we reviewed the evidence supporting these new therapies. The combination of atezolizumab and bevacizumab has become a new standard of care for initial systemic therapy in eligible patients, replacing sorafenib in the first line for many patients. Lenvatinib, a multikinase inhibitor, is also a new first line treatment option for patients who are not eligible for immunotherapy. Several additional options for second line treatment were also reviewed in detail in this paper. New systemic therapies for advanced HCC have prolonged overall survival. However, these new therapies are primarily approved for patients with Child-Pugh A classification with few options for patients with Child-Pugh B disease. Further work is needed to expand options for patients with more advanced liver disease and to optimize the sequencing of these new therapies.

Nintedanib as an Anti-Fibrotic Therapy in a Mouse Model of Chronic Lung Allograft Dysfunction

<h3>Purpose</h3> Chronic lung allograft dysfunction (CLAD) is the leading cause of lung transplant failure, with 50% of patients developing it by five years post-transplant. CLAD is characterized by progressive fibrosis, and it has no effective therapies. Nintedanib is a multiple tyrosine kinase inhibitor used to treat idiopathic pulmonary fibrosis. Here we assess nintedanib's efficacy, with tacrolimus, as a potential preventative CLAD therapy in the heterotopic tracheal transplant mouse model of CLAD-like airway fibrosis. <h3>Methods</h3> We performed Balb/C (H-2^d)-to-C57BL/6 (H-2^b) transplants. To arrive at effective doses of nintedanib and tacrolimus alone, we treated nine groups of n=10 recipients with one of three doses of nintedanib (0, 25, 50mg/kg), or six doses of tacrolimus (0, 0.1, 0.25, 0.5, 1, 2mg/kg). Mice were given either drug daily for 28 days. Following sacrifice, tracheas underwent Masson-Trichrome staining and were graded for luminal fibrotic occlusion and epithelial necrosis. Kruskal-Wallis one-way analyses of variance were performed on both grades within drug treatments. <h3>Results</h3> We found that compared to the control (Fig. 1C), fibrotic occlusion was significantly reduced in nintedanib treatment groups, but that epithelial necrosis was unaffected (Fig. 1 A, B, D). In contrast, we found that high doses of tacrolimus eliminated both pathologies (Fig. 1 A, B, E). Lower doses of tacrolimus had a moderate effect on luminal occlusion, and no effect on epithelial necrosis. <h3>Conclusion</h3> Our results demonstrate nintedanib's potential as an anti-fibrotic drug in lung transplantation. Nintedanib caused a significant decrease in fibrotic occlusion, but epithelial necrosis was reduced only by tacrolimus. Based on this, we will examine the combined effects of the drugs to arrive at a treatment strategy with both immunosuppressive and antifibrotic components.

Cholesterol suppresses GOLM1-dependent selective autophagy of RTKs in hepatocellular carcinoma.

Aberrant activation of receptor tyrosine kinases (RTKs) and the subsequent metabolic reprogramming play critical roles in cancer progression. Our previous study has shown that Golgi membrane protein 1 (GOLM1) promotes hepatocellular carcinoma (HCC) metastasis by enhancing the recycling of RTKs. However, how this RTK recycling process is regulated and coupled with RTK degradation remains poorly defined. Here, we demonstrate that cholesterol suppresses the autophagic degradation of RTKs in a GOLM1-dependent manner. Further mechanistic studies reveal that GOLM1 mediates the selective autophagy of RTKs by interacting with LC3 through an LC3-interacting region (LIR), which is regulated by a cholesterol-mTORC1 axis. Lowering cholesterol by statins improves the efficacy of multiple tyrosine kinase inhibitors (TKIs) invivo. Our findings indicate that cholesterol serves as a signal to switch GOLM1-RTK degradation to GOLM1-RTK recycling and suggest that lowering cholesterol by statin may be a promising combination strategy to improve the TKI efficiency in HCC.

Allogeneic stem cell transplantation for chronic myeloid leukemia in the tyrosine kinase inhibitor era

Chronic myeloid leukemia (CML) is a clonal myeloproliferative neoplasm characterized by the production of mature granulocytes and their precursors that are dysregulated and uncontrolled. The presence of the Philadelphia chromosome (Ph) is the hallmark of CML; it encodes a chimeric protein with constitutive tyrosine kinase activity that leads to uncontrolled cell growth and eventually the development of CML. Tyrosine kinase inhibitors (TKI) revolutionized the management of patients with CML. Before TKIs, hematopoietic stem cell transplantation had a major role in the treatment of these patients, but currently, its use is limited to cases presenting in the advanced phase and patients in the chronic phase failing multiple TKIs. In this article, the author summarizes the data about hematopoietic stem cell transplantation use in chronic phase CML, reviews the published guidelines, and provides his opinion.

Case-based Roundtable on Management Approach for Newly Diagnosed Chronic Myeloid Leukaemia (CML) Patients

Chronic myeloid leukaemia (CML) is one of the success stories in oncology care. The remarkable activity of tyrosine kinase inhibitors (TKIs) in CML has revolutionised the therapeutic landscape of this cancer which was uniformly fatal till a few decades back. However, with the availability of multiple TKIs, there is a need to have standard guidelines for their selection and optimal use in a particular patient.

Lenvatinib Beyond First-Line Therapy in Patients With Advanced Biliary Tract Carcinoma.

IntroductionLenvatinib, a multiple receptor tyrosine kinase inhibitors that target vascular endothelial growth factor receptors and fibroblast growth factor receptors, recently demonstrated a treatment effect in various tumors. This study evaluated the efficacy and safety of lenvatinib for patients with biliary tract cancers (BTCs) who had received ≥1 line of prior systemic anti-BTC therapy.MethodsThis open-label, single-arm study included adult (≥18 years) patients with histologically confirmed BTC. Efficacy and safety were evaluated based on the Response Evaluation Criteria in Solid Tumors RECIST Version 1.1 (RECIST 1.1) and the National Cancer Institute Common Terminology Criteria for Adverse Events (CTCAE version 4.0). Changes in tumor biomarkers throughout the treatment period were recorded.Results41 patients received lenvatinib treatment. The ORR was 12% (95% CI: 1.7–22.7), with a median PFS of 3.8 months (95% CI: 1.3–6.3) and an OS of 11.4 months (95% CI: 6.6–16.2). Thirty-nine (95.1%) patients experienced ≥1 treatment-related adverse event. Decreasing carbohydrate antigen 19-9 (CA19-9) level predicted tumor size reduction in intrahepatic cholangiocarcinoma with a sensitivity of 77.7% and a specificity of 73.9%.ConclusionsLenvatinib which was individualized based on the patient’s weight has promising clinical activity against advanced BTC and had an acceptable safety profile. Additionally, serum biomarkers and gene sequencing may hold the potential to guide our treatment.

MiR-96-5p targets PTEN to mediate sunitinib resistance in clear cell renal cell carcinoma

A multiple receptor tyrosine kinase inhibitor, sunitinib, is a first-line therapy for clear cell renal cell carcinoma (CCRCC). Unfortunately, it has the major challenges of low initial response rate and resistance after about one year of treatment. Here we evaluated a microRNA (miRNA) and its target responsible for sunitinib resistance. Using miRNA profiling, we identified miR-96-5p upregulation in tumors from sunitinib-resistant CCRCC patients. By bioinformatic analysis, PTEN was selected as a potential target of miR-96-5p, which showed low levels in tumors from sunitinib-resistant CCRCC patients. Furthermore, PTEN and miR-96-5p levels were negatively correlated in a large The Cancer Genome Atlas kidney renal clear cell carcinoma cohort and high miR-96 and low PTEN represented poor prognosis in this cohort. Additionally, four-week sunitinib treatment increased miR-96-5p and decreased PTEN only in tumors from a sunitinib-resistant patient-derived xenograft model. We found a novel miR-96-5p binding site in the PTEN 3′ UTR and confirmed direct repression by luciferase reporter assay. Furthermore, we demonstrated that repression of PTEN by miR-96-5p increased cell proliferation and migration in sunitinib-treated cell lines. These results highlight the direct suppression of PTEN by miR-96-5p and that high miR-96-5p and low PTEN are partially responsible for sunitinib resistance and poor prognosis in CCRCC.

Global management of brain metastasis from renal cell carcinoma

During the last decade, major improvements have been made in the treatment of renal cell carcinoma (RCC) with the development and use of multiple tyrosine kinase inhibitors and immune checkpoint inhibitors. Brain metastases in RCC patients (BM-RCC) is associated with poor outcome and their management represents a challenge for clinicians. In most of case, brain metastases in this context require local intervention such as radiotherapy, stereotactic radiotherapy/stereotactic radiosurgery and whole brain radiation therapy. Despite efficacy in extracranial metastases, systemic therapies have modest antitumoral effect on cerebral lesions. In this review, we highlight the benefits and pitfalls of the available therapies in BM-RCC.

POS-384 EFFECT OF ANG-3070 IN THE PASSIVE HEYMANN NEPHRITIS RAT MODEL OF PRIMARY PROTEINURIC KIDNEY DISEASE

Primary proteinuric kidney diseases (PPKD) as a group are an important cause of end-stage kidney disease (ESKD). Many receptor tyrosine kinases, including platelet-derived growth factor receptor (PDGFR), contribute to the progression of PPKDs to ESKD. ANG-3070 is a novel and proprietary inhibitor of multiple tyrosine kinases including PDGFR. This study evaluated the effects of ANG-3070 in a passive Heymann nephritis (PHN) rat model of membranous glomerulopathy.

Phase II study of sitravatinib in combination with tislelizumab in patients with advanced biliary tract cancer who have failed to at least 1 prior systemic treatment: Trial in progress.

TPS490 Background: In biliary tract cancer (BTC), there was a positive association of overall survival (OS) with high levels of tumor-infiltrating CD4+, CD8+, and Foxp3+ T lymphocytes, whereas increases in PD-1+/CD8+ tumor-infiltrating lymphocytes had a negative association with OS (Tariq NU et al. 2018). Therefore, immune-modulating treatment can be promising option to overcome a dismal prognosis in BTC patients. However, immune checkpoint inhibitor (ICI) monotherapy, including tislelizumab (anti-PD-1 monoclonal antibody), has a modest effect in advanced BTC (Desai J et al. 2020). Thus, several combination strategies to improve the anti-tumor effect of ICI are being conducted. Anti-angiogenic agent in combination with ICI is one of the promising strategies in which anti-angiogenic agent induced improved anti-tumor immune responses by increasing tumor antigen presentation and promoting lymphocyte infiltration and migration (Song Y et al. 2020). However, this combination have not been widely tested in BTC patients. Sitravatinib is a potent inhibitor of multiple receptor tyrosine kinases including Axl, MER, MET, KIT, FLT3, RET, VEGFR1-3, PDGFRα, which targets are expressed in a number of immune cell types and promote an immunosuppressive tumor microenvironment. This study aim to evaluate the efficacy of the combination strategy of sitravatinib with tislelizumab in advanced BTC and to reveal the immune-modulation through the combination of ICI and antiangiogenic agents. Methods: This study is an open-label, phase 2 study to evaluate the efficacy of sitravatinib and tislelizumab combination treatment in advanced BTC patients who have failed to first-line chemotherapy. Eligible patients have histologically proven BTC (including intrahepatic cholangiocarcinoma, extrahepatic bile duct cancer, gallbladder cancer, and ampulla of Vater cancer) and have failed one prior systemic chemotherapy. Patients who have previously received ICI can be enrolled. However, patients who have experienced unacceptable toxicity during prior ICI treatment are excluded. All patients will receive sitravatinib 120mg orally once daily in combination with tislelizumab 200mg intravenously once every 3 weeks until disease progression, unacceptable toxicity, or withdrawal of consent. The primary endpoint is disease control rate, with key secondary endpoints including overall response rate, progression-free survival, overall survival, and safety. For evaluating metabolic response, 18F-FDG PET-CT scan will be performed before treatment and at the first response evaluation. Tissue biopsies will be conducted three times in total: screening, the first response evaluation, and disease progression. Blood samples are being collected every cycles for translational biomarker studies. Clinical trial information: NCT04727996.

A phase 1b multitumor cohort study of cabozantinib plus atezolizumab in advanced solid tumors (COSMIC-021): Results of the colorectal cancer cohort.

121 Background: Cabozantinib, a multiple receptor tyrosine kinase inhibitor, promotes an immune-permissive environment which may enhance the activity of immune checkpoint inhibitors. COSMIC-021 (NCT03170960) is evaluating the combination of cabozantinib with atezolizumab, an anti-PD-L1 inhibitor, in patients with advanced solid tumors. Outcomes in patients (pts) with metastatic colorectal cancer (mCRC) previously treated with fluoropyrimidine-containing therapy are presented. Methods: Pts with mCRC and an ECOG PS of 0–1 who progressed during or following systemic chemotherapy including fluoropyrimidine plus oxaliplatin or irinotecan were eligible. Up to 2 prior lines of anti-cancer therapy including EGFR-targeted therapy were allowed. Microsatellite instability high (MSI-H) and/or mismatch repair (MMR)-deficient pts were excluded. Pts received cabozantinib 40 mg PO QD plus atezolizumab 1200 mg IV Q3W. The primary endpoint was objective response rate (ORR) per RECIST 1.1 by investigator. Other endpoints included safety, duration of response (DOR), progression-free survival (PFS), and overall survival (OS). CT/MRI scans were performed Q6W for the first year and Q12W thereafter. Results: 31 pts received cabozantinib plus atezolizumab (median age, 60 y [range 31, 79]; male, 58%; ECOG PS 1, 61%; 2 prior lines of therapy, 71%; prior EGFR inhibitor, 16%; ≥3 tumor sites, 52%; tumors in left colorectum, 71%). Median follow-up was 28.1 mo (range, 24.2, 31.3) as of July 21, 2021. Cabozantinib plus atezolizumab demonstrated clinical activity in pts with mCRC (Table). Patients with wild-type RAS (n = 12) had numerically longer PFS and OS and higher ORR vs those with mutations (n = 19) (Table). Treatment-related adverse events (TRAEs) of any grade occurred in 28 (90%); the most common were diarrhea (52%), fatigue (42%), and nausea (35%). Grade 3-4 TRAEs occurred in 16 (52%); the most common were hypertension (10%), fatigue (6%), and lipase increased (6%); no Grade 5 events were reported. Conclusions: Cabozantinib plus atezolizumab demonstrated encouraging clinical activity with manageable toxicity in pts with previously treated advanced non-MSI-H/MMR-proficient CRC. Clinical trial information: NCT03170960. [Table: see text]

Real-world Treatment Patterns and Reasons for Therapy Selection in Patients with Advanced Hepatocellular Carcinoma in US Oncology Practices.

BackgroundThe treatment landscape for advanced hepatocellular carcinoma (aHCC) is rapidly expanding beyond tyrosine kinase inhibitors (TKIs) in the first-line (1L) setting, with multiple TKIs and immune-checkpoint inhibitors (ICIs) now being evaluated in combination. Real-world evidence describing current treatment patterns and reasons for 1L and 2L treatment selection in aHCC is sparse.Patients and MethodsA retrospective cohort study with a cross-sectional survey element was conducted using Cardinal Health’s Oncology Provider Extended Network. U.S. medical oncologists identified adult aHCC patients initiating 1L systemic therapy between January 1, 2017 and July 31, 2019 and abstracted data from patient medical records. Data included provider characteristics, patient demographics and clinical characteristics, treatment regimens, and physician rationale for treatment regimen choice.ResultsA total of 44 medical oncologists provided data on 284 aHCC patients. The median age at 1L initiation was 61.5 years, and the majority were male (78%) and white (66%). Nearly half (47%) initiated 1L treatment in 2019, 34% were ECOG performance status 2+, and 63% were Child-Pugh Class B/C. Among the 284 aHCC patients, TKIs were used by 94% of patients in the 1L setting, comprised predominantly of sorafenib (54%) and lenvatinib (38%). ICIs were most common among the 90 patients (66%) who received 2L treatment.ConclusionIn the community-oncology practice setting, nearly all aHCC patients received sorafenib or lenvatinib in the 1L setting, while the majority of patients received an ICI in the 2L setting. With recent ICI approvals in aHCC, this marks the beginning of an increased use of ICIs in the 1L setting.

Management of Oligoprogression in Patients with Metastatic NSCLC Harboring ALK Rearrangements.

Simple SummaryThe growing efficacy and availability of new targeted systemic therapies have markedly improved the prognosis of metastatic lung cancer patients harboring ALK rearrangements. The use of effective targeted therapies capable of maintaining a prolonged control of disease, for as long as possible, is paramount to ensure the best survival outcomes. In this regard, in cases of oligoprogression, “beyond progression” systemic treatment added to local ablative therapies is considered a feasible option in an attempt to improve the quality and quantity of patients’ lives, even if based on retrospective data. Certainly, treatment of ALK rearranged lung cancer patients with oligoprogressive disease must be individualized and based on multidisciplinary decisions. Above all, when further molecular targeted therapies are available, options must always be evaluated, especially in case of cerebral progression. In this review, we provide an updated and comprehensive overview of the main treatment strategies in cases of ALK rearranged oligoprogression.Personalized treatment based on driver molecular alterations, such as ALK rearrangement, has revolutionized the therapeutic management of advanced oncogene-addicted NSCLC patients. Multiple effective ALK tyrosine kinase inhibitors (TKIs), with the amelioration of the activity at central nervous system level, are now available, leading to substantial prognosis improvement. The exposure to TKIs triggers resistance mechanisms and the sequential administration of other TKIs and chemotherapy is, for the most part, not targeted. In this context, extending the benefit deriving from precision medicine is paramount, above all, when disease progression occurs in a limited number of sites. Retrospective data indicate that, in oligoprogressive disease, targeted therapy beyond progression combined with definitive local treatment of the progressing site(s) is an effective alternative. In these cases, a multidisciplinary approach becomes essential for an integrated treatment strategy, depending on the site of disease progression, in order to improve not only survival, but also quality of life. In this review we provide an updated and comprehensive overview of the main treatment strategies in cases of ALK rearranged oligoprogression, including systemic treatment as well as local therapy, and report a real-world clinical story, with the final aim of identifying the most promising management for this subset of patients.

Intracellular Reduction-Responsive Molecular Targeted Nanomedicine for Hepatocellular Carcinoma Therapy.

The stimuli-responsive polymer-based platform for controlled drug delivery has gained increasing attention in treating hepatocellular carcinoma (HCC) owing to the fascinating biocompatibility and biodegradability, improved antitumor efficacy, and negligible side effects recently. Herein, a disulfide bond-contained polypeptide nanogel, methoxy poly(ethylene glycol)−poly(l-phenylalanine-co-l-cystine) [mPEG−P(LP-co-LC)] nanogel, which could be responsive to the intracellular reduction microenvironments, was developed to deliver lenvatinib (LEN), an inhibitor of multiple receptor tyrosine kinases, for HCC therapy. The lenvatinib-loaded nanogel (NG/LEN) displayed concise drug delivery under the stimulus of glutathione in the cancer cells. Furthermore, the intracellular reduction-responsive nanomedicine NG/LEN showed excellent antitumor effect and almost no side effects toward both subcutaneous and orthotopic HCC tumor-allografted mice in comparison to free drug. The excellent tumor-inhibition efficacy with negligible side effects demonstrated the potential of NG/LEN for clinical molecular targeted therapy of gastrointestinal carcinoma in the future.

Managing Central Nervous System Spread of Lung Cancer: The State of the Art

Brain metastases (BrM) are common in both non–small-cell lung cancer and small-cell lung cancer. Substantial progress in BrM management has occurred in the past decade related to advances in both radiation and medical oncology. Recent and ongoing radiation trials have focused on increasing the candidacy for focal therapy of BrM with stereotactic radiosurgery; reducing the toxicity and improving patient selection for whole brain radiotherapy; and, in small-cell lung cancer, evaluating brain magnetic resonance imaging surveillance without prophylactic cranial irradiation, hippocampal avoidance in prophylactic cranial irradiation and whole brain radiotherapy, and the role of upfront stereotactic radiosurgery for BrM. In medical oncology, the development of multiple tyrosine kinase inhibitors with encouraging CNS activity and emerging data on the CNS activity of immune checkpoint inhibitors in some patients have opened the door to novel systemic and multidisciplinary treatment strategies for the management of BrM. Future research will focus on more robust characterizations of the CNS activity of targeted therapy and immunotherapies, as well as optimal integration and patient selection for multidisciplinary strategies involving CNS-active drugs, radiation therapy, and CNS surveillance.

Treatment of hepatocellular carcinoma with autologous platelets encapsulating sorafenib or lenvatinib: A novel therapy exploiting tumor-platelet interactions.

Hepatocellular carcinoma (HCC) activates platelets through the action of adjacent sinusoidal cells. Activated platelets bind to tumor-associated endothelial cells and release growth factors that promote tumor progression. We hypothesized that platelets encapsulated with tumor inhibitors would function as drug carriers for tumor therapy. We propose a therapeutic strategy for HCC using autologous platelets encapsulating multiple tyrosine kinase inhibitors in a rat chemically induced HCC model. Sorafenib or lenvatinib was encapsulated in platelets isolated from tumor-bearing rats in vitro. The rats were divided into groups that received repeated intravenous injections (twice a week for 10 weeks) of the following materials: placebo, sorafenib (SOR), lenvatinib (LEN), autologous platelets, autologous platelets encapsulating sorafenib (SOR-PLT) and autologous platelets encapsulating lenvatinib (LEN-PLT). The therapeutic effect was then analyzed by ultrasonography (US) and histopathological analysis. Histopathological and US analysis demonstrated extensive tumor necrosis in the tumor tissue of SOR-PLT or LEN-PLT, but not in other experimental groups. By liquid chromatography-mass spectrometry, more abundant sorafenib was detected in tumor tissues after SOR-PLT administration than in surrounding normal tissues, but no such difference in sorafenib level was observed with SOR administration. Therefore, the use of autologous platelets encapsulating drugs might be a novel therapeutic strategy for HCC.

Synergistic Combination Activity of the Novel GSPT1 Degrader CC-90009 in Acute Myeloid Leukemia Models

Introduction: CC-90009 is a novel cereblon E3 ligase modulator (CELMoD ®) agent that is a first-in-class degrader of translation termination factor G1 to S phase transition 1 (GSPT1). CC-90009 has demonstrated antileukemic activity as a single agent and is currently under investigation in patients with acute myeloid leukemia (AML; NCT02848001). Treatment with CC-90009 led to rapid reductions in peripheral and bone marrow blasts, and demonstrated preliminary promising efficacy, including several complete remissions, in patients with relapsed or refractory AML. Here, we describe the identification and preclinical activity of select anti-AML agents as potential combination partners of CC-90009 to further improve its efficacy and therapeutic index. Based on these results, the combination activity of CC-90009 with venetoclax (VEN)/azacitidine (AZA) is being evaluated in a phase 1/2 trial in patients with AML (NCT04336982).Methods: A high-throughput cell viability screen was performed to identify synergistic partners of CC-90009. AML cell lines (HL-60, HNT-34, KG-1, ML-2, NOMO-1, MOLM-13, MV4-11, F-36P, OCI-AML2, OCI-AML3) were treated with CC-90009 in combination with > 70 compounds, including standard anti-AML agents, tyrosine kinase inhibitors (TKIs), unfolded protein response inducers, transcription inhibitors, and epigenetic agents. MOLM-13 and MV4-11 are fms-like tyrosine kinase 3 internal tandem duplication (FLT3-ITD) cell lines. Hits were validated in a colony formation (CF) assay using primary AML cells and bone marrow mononuclear cells (BMMC) from healthy donors. Synergy of the combination partners with CC-90009 was further assessed in AML patient-derived xenograft (PDX) models. Synergy between the isocitrate dehydrogenase 2 (IDH2) inhibitor enasidenib and CC-90009 was evaluated in a TF-1 erythroleukemia cell line overexpressing IDH2 R140Q mutant, and an IDH2 R140Q PDX model, AM7577.Results: Our high-throughput combination screen revealed multiple TKIs, epigenetic agents, and pro-apoptotic agents as potential combination partners of CC-90009 in AML cell lines. FLT3 inhibitors, including sunitinib, pexidartinib, midostaurin, lestaurtinib, crenolanib, and gilteritinib, synergized with CC-90009 to reduce viability in FLT3-ITD AML cell lines MV4-11 and MOLM-13. Similarly, the B-cell lymphoma 2 (BCL2) inhibitor VEN potentiated CC-90009-induced apoptosis and accelerated cell-autonomous killing. Reduction in levels of MCL-1, an anti-apoptotic factor, by CC-90009 most likely contributed to the synergy with VEN.We prioritized the evaluation of FLT3, BCL2, and IDH2 inhibitors as partners of CC-90009. In CF assays, midostaurin enhanced the inhibitory effect of CC-90009 in primary AML cells, without augmenting the effect of CC-90009 in CD34+ BMMC from healthy donors. Similarly, VEN enhanced the reduction in CF by CC-90009 in AML patient-derived BMMC without exacerbating the decrease in CF by CC-90009 in BMMC from healthy donors.We characterized FLT3 inhibitor/CC-90009 and BCL2 inhibitor/AZA/CC-90009 combinations in a FLT3-ITD PDX murine model, PDX1. The FLT3 inhibitor quizartinib significantly prolonged survival when combined with CC-90009 compared with either agent alone (P < 0.001). Similarly, VEN/AZA/CC-90009 combination markedly extended survival compared with single agents or VEN/AZA doublets (P < 0.001).The synergy between CC-90009 and epigenetic modulators was validated and further characterized in customized cell differentiation assays. Addition of CC-90009 to enasidenib, a mutant IDH2 inhibitor, enhanced differentiation and killing of CD34+ stem and progenitor cells, and increased differentiated CD235a+ erythroblasts, compared with enasidenib alone in a TF-1 cell line overexpressing IDH2 R140Q. Enasidenib/CC-90009 combination treatment reduced CD45+ malignant populations and increased differentiated CD14+ cells, leading to significantly prolonged animal survival in an IDH2 R140Q PDX model, AM7577, compared with either agent alone (P < 0.0001).Conclusion: Using a high-throughput combination screen, we identified rational combination partners that synergize with CC-90009 in in vitro and in vivo AML models. Collectively, these results support the clinical evaluation of CC-90009 in combination with FLT3, BCL2, and IDH2 inhibitors to further improve treatment outcomes for patients with AML. DisclosuresPierce: Bristol Myers Squibb: Current Employment, Current equity holder in publicly-traded company. Yao: Bristol Myers Squibb: Consultancy, Current equity holder in publicly-traded company, Ended employment in the past 24 months, Research Funding. Pace: Bristol Myers Squibb: Current Employment, Current equity holder in publicly-traded company, Patents & Royalties. Wang: Bristol Myers Squibb: Current Employment, Current equity holder in publicly-traded company. Flandin-Blety: Bristol Myers Squibb: Current Employment. Benitez: Bristol Myers Squibb: Current Employment. Guarinos: Bristol Myers Squibb: Current Employment. Hoffmann: Bristol Myers Squibb: Current Employment. Carrancio: Bristol Myers Squibb: Current Employment, Current equity holder in publicly-traded company. Pourdehnad: Bristol Myers Squibb: Current Employment, Current equity holder in publicly-traded company, Patents & Royalties.

Real-World Analysis of the Clinical and Economic Burden of Later Line in Chronic Myeloid Leukemia Patients in Italy

BackgroundThe use of real-world data in oncology is gaining increasing interest, as it can provide valuable insights into treatments and related outcomes in routine daily oncology practice, thus integrating the evidence coming from clinical trials. The study aims to describe the characteristics of patients (pts) with chronic myeloid leukemia (CML) in 2 nd or ≥3 rd tyrosine kinase inhibitors (TKI) lines of therapy, analyze their drug utilization and evaluate healthcare direct costs for the Italian National Health Service in order to estimate the impact of disease burden.MethodsThis retrospective observational analysis was based on administrative databases covering around 15.3 million subjects in Italy. All adult pts with prescription of the TKIs bosutinib (BOS), dasatinib (DAS), imatinib (IMA), nilotinib (NIL), ponatinib (PON) in 2 nd or ≥3 rd line of therapy during 01/2015-12/2018 were included. Specifically, those with IMA, DAS or PON prescription were enrolled if they also presented ≥1 CML hospitalization or previous prescription for NIL or BOS or ≥1 BCR-ABL1 RQ-PCR test without hospitalization for acute lymphoid leukemia. Pts enrolled in clinical trials were not captured. Index date was 1 st prescription date for a TKI in 2 nd or ≥3 rd line. Comorbidities were assessed by hospitalization diagnosis codes and/or presence of specific drugs as proxy of diagnosis. Mean annual healthcare resource costs were evaluated during follow-up (from index date to end of study) in terms of drugs other than TKI (excluded), visits, tests, hospitalizations (overall and comorbidity-related during treatment).ResultsOverall, 491 pts in 2 nd and 144 in ≥3 rd line were included. In each calendar year from 2015 to 2018, the incidence of pts who entered a 2 nd line changed from 22.6% to 28.7%, whereas the ≥3 rd line fluctuated from 37% to 46.7%. An increment of 97.6% was observed in the number of pts treated in ≥3 rd line from 2015 to 2018 (figure 1). As 2 nd line, 40.9% was represented by DAS, 28.9% NIL, 12.2% BOS, 10.2% PON and 7.8% IMA. Mean age ranged from 56.1 (PON) to 68.2 (BOS) years. At baseline, hypertension was the most reported comorbidity (from 64.1% for NIL to 91.7% for BOS), followed by metabolic (from 27.9% in DAS pts to 63.2% for IMA) and blood count (from 28.4% for DAS to 58.0% for PON) alterations. Among pts in ≥3 rd line, 26.3% received imatinib, 22.2% PON, 18.8% NIL, 16.7% BOS, 16% DAS. Mean age was 57 years for NIL, 64.8 PON and 69.5 BOS pts. Same trend of comorbidities was reported in the ≥3 rd line cohort, with hypertension detected in all pts starting BOS to a minimum of 65.2% pts in DAS group, followed by blood count alteration (34.8% for DAS to 59.4% for PON) and metabolic alterations (37.0% for NIL to 50.0% for BOS). Baseline cardiovascular comorbidities were present in 22.8% of pts starting a 2 nd line and in 35.4% of pts starting ≥3 rd line. After a median follow up of 3.0 and 2.6 years, 13% and 19% of pts died in 2 nd and ≥3 rd lines, respectively, around 40% in both lines discontinued their treatment. Median time to discontinuation was 5.5 (95%CI: 4.7-6.2) (2 nd line) and 4.3 (95%CI: 3.2-5.2) (≥3 rd line) years. Mean number of annual hospitalizations was 0.6 (from 0.4 for NIL to 1.1 for PON) in 2 nd line, and 0.5 (from 0.4 for IMA and NIL to 0.7 for PON) in ≥3 rd line. Total mean annual costs/pts (TKI excluded) were of €10,168 (PON), €6,106 (BOS), €5,086 (DAS), €4,779 (NIL) and €3,905 (IMA), with hospitalizations comorbidity-related accounting for €3,245 among PON, €2,820 BOS, €1,739 NIL, €1,573 DAS and €1,448 IMA pts. Mean annual costs per lines are shown in figure 2.ConclusionsThis real-world study provided a demographic and clinical profile of CML pts in 2 nd and ≥3 rd TKI lines and described drug utilization and resource consumption in the Italian clinical practice setting. An increase of pts treated with TKIs in ≥3 rd line was reported, reflecting the availability of multiple TKIs over the years; moreover, a highly comorbid population suggests an increasingly complex CML management. Our results underlined a heavy clinical and economic burden for pts in 2 nd or ≥3 rd lines, especially in terms of comorbidities, treatment discontinuation and hospitalizations suggesting the need of novel therapeutic options for management of later lines CML. [Display omitted] DisclosuresBreccia: Novartis: Consultancy; Pfizer: Consultancy; BMS: Consultancy; INCYTE: Consultancy; Abbvie: Consultancy. Chiodi: Novartis: Current Employment. Valsecchi: Novartis Farma SpA: Current Employment. Rendace: Novartis Farma S.p.A.: Current Employment. Coco: Novartis Farma S.p.A.: Current Employment. Premoli: Novartis Farma SpA: Current Employment.