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Nagasaka M, Goto K, Gomez J, Hida T, Shu C, Lee C, Park K, Cho B, Lee J, Ou S, Bestvina C, Natale R, Haddish-Berhane N, Bhattacharya A, Verheijen R, Agrawal T, Knoblauch R, Govindan R. P50.04 Amivantamab in Combination With Chemotherapy in Patients With Advanced Non-Small Cell Lung Cancer (NSCLC). J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.08.532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Okada N, Sugiyama K, Shichi S, Shirai Y, Goto K, Sakane F, Kitamura H, Taketomi A. Combination therapy for hepatocellular carcinoma with diacylglycerol kinase alpha inhibition and anti-programmed cell death-1 ligand blockade. Cancer Immunol Immunother 2021; 71:889-903. [PMID: 34482409 DOI: 10.1007/s00262-021-03041-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 08/22/2021] [Indexed: 12/13/2022]
Abstract
Activation of diacylglycerol kinase alpha (DGKα) augments proliferation and suppresses apoptosis of cancer cells and induces T lymphocyte anergy. We investigated the dual effects of DGKα inhibition on tumorigenesis and anti-tumor immunity with the aim of establishing a novel therapeutic strategy for cancer. We examined the effects of a DGKα inhibitor (DGKAI) on liver cancer cell proliferation and cytokine production by immune cells in vitro and on tumorigenesis and host immunity in a hepatocellular carcinoma (HCC) mouse model. Oral DGKAI significantly suppressed tumor growth and prolonged survival in model mice. Tumor infiltration of T cells and dendritic cells was also enhanced in mice treated with DGKAI, and the production of cytokines and cytotoxic molecules by CD4+ and CD8+ T cells was increased. Depletion of CD8+ T cells reduced the effect of DGKAI. Furthermore, interferon-γ stimulation augmented the expression of programmed cell death-1 ligand (PD-L1) on cancer cells, and DGKAI plus an anti-PD-L1 antibody strongly suppressed the tumor growth. These results suggest that DGKα inhibition may be a promising new treatment strategy for HCC.
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Hase T, Fujiwara Y, Makihara R, Hashimoto N, Tsubata Y, Okuno T, Naito T, Takahashi T, Kobayashi H, Shinno Y, Ikeda T, Goto K, Hosomi Y, Watanabe K, Kitazono S, Sakiyama N, Makino Y, Yamamoto N. 1249P Pharmacokinetic and dose finding study of osimertinib in patients with impaired renal function and low body weight. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.1854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Smit E, Li B, Mazieres J, Planchard D, Nakagawa K, Goto K, Paz-Ares L, Novello S, Yang JH, Ahn MJ, Liu G, O'Byrne K, Aregay M, Shiga R, Saxena K, Meinhardt G, Jänne P. 1361TiP Trastuzumab deruxtecan (T-DXd) in patients (pts) with HER2-mutated (HER2m) metastatic non-small cell lung cancer (NSCLC): A phase (ph) II study (DESTINY-Lung02). Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.1962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Shu C, Goto K, Ohe Y, Besse B, Park K, Wang Y, Griesinger F, Yang JH, Felip E, Sanborn R, Caro RB, Bauml J, Chen J, Fennema E, Mahoney J, Trani L, Knoblauch R, Thayu M, Cho B. 1193MO Amivantamab plus lazertinib in post-osimertinib, post-platinum chemotherapy EGFR-mutant non-small cell lung cancer (NSCLC): Preliminary results from CHRYSALIS-2. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.1798] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Liu S, De Braud F, Drilon A, Doebele R, Patel M, Cho B, Ahn M, Chiu C, Farago A, Goto K, Lee J, Ohe Y, Ou S, Cassier P, Tan D, Otterson G, Veronese L, Osborne S, Simmons B, Siena S. Corrigendum to “Entrectinib in patients with ROS1 fusion-positive non-small cell lung cancer (NSCLC) or NTRK fusion-positive solid tumours: Analysis of response by line of therapy”. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.01.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Sabari J, Shu C, Park K, Leighl N, Mitchell P, Kim S, Lee J, Kim D, Viteri S, Spira A, Han J, Trigo J, Lee C, Lee K, Girard N, Yang T, Goto K, Sanborn R, Yang J, Xie J, Roshak A, Thayu M, Knoblauch R, Cho B. OA04.04 Amivantamab in Post-platinum EGFR Exon 20 Insertion Mutant Non-small Cell Lung Cancer. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.284] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Loong H, Goto K, Park K, Ohe Y, Nishio M, Cho B, Kim Y, French P, Soldatenkova V, Tan D. FP14.10 Efficacy and Safety of Selpercatinib (LOXO-292) in East Asian Patients with RET Fusion-Positive NSCLC. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.153] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Goto K, Wolf J, Elamin Y, Santini F, Soldatenkova V, Sashegyi A, Lin AB, Lin B, Novello S, Arriola Aperribay E, Perol M, Loong H, Drilon A, Park K, Solomon B, Zhou C. FP14.05 LIBRETTO-431: Selpercatinib in Treatment-Naïve Patients with RET Fusion-Positive Non-Small Cell Lung Cancer (NSCLC). J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.148] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Matsumoto S, Ikeda T, Zenke Y, Kato T, Sugawara S, Nishino K, Nakachi I, Daga H, Furuya N, Morise M, Sakakibara-Konishi J, Yoh K, Goto K. P89.06 Prospective Concordance Study of a Multi-Gene PCR Assay and NGS for the Detection of Targetable Gene Alterations in Lung Cancer. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.1271] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Goto K, Hida T, Funami N, Iwasawa R, Mita S, Botilde Y, Yamashita A, Inoh Y, Haddish-Berhane N, Xie J, Roshak A, Knoblauch R, Ohe Y. P15.03 A Phase 1/1b Study of Lazertinib as Monotherapy and in Combination with Amivantamab in Advanced EGFR-Mutated NSCLC. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.540] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Hozumi Y, Nakano T, Goto K. Cellular expression and subcellular localization of diacylglycerol kinase γ in rat brain. Biomed Res 2021; 42:33-42. [PMID: 33563877 DOI: 10.2220/biomedres.42.33] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Gq protein-coupled receptors lead to activation of phospholipase C, which triggers phosphoinositide signaling. Diacylglycerol (DG) is one of the phosphoinositide metabolites and serves as a second messenger. Diacylglycerol kinase (DGK) phosphorylates DG to produce another second messenger phosphatidic acid. Of the DGK family, DGKγ is predominantly expressed in the brain at the mRNA level. Recent studies have shown the expression of DGKγ in vascular endothelial cells and adrenal medullary cells at the protein level, although its detailed cellular expression pattern and subcellular localization in the brain remain to be determined. In the present study, we addressed this point using specific DGKγ antibody. DGKγ was expressed in both projection neurons and interneurons in the cerebral cortex, hippocampal formation, and cerebellum. In cerebellar Purkinje cells, DGKγ was distributed to the soma and dendrites. Fractionation study revealed that DGKγ was enriched in the internal membranes containing the endoplasmic reticulum and Golgi complex. In immunoelectron microscopy, DGKγ was localized throughout the smooth endoplasmic reticulum system. These findings suggest that DGKγ shows unique cellular expression pattern in the brain and distinct subcellular localization different from other DGK isozymes.
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Tanaka T, Nakano T, Hozumi Y, Martelli AM, Goto K. Regulation of p53 and NF-κB transactivation activities by DGKζ in catalytic activity-dependent and -independent manners. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2021; 1868:118953. [PMID: 33450306 DOI: 10.1016/j.bbamcr.2021.118953] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 12/15/2020] [Accepted: 01/02/2021] [Indexed: 01/03/2023]
Abstract
Diacylglycerol kinase (DGK) constitutes a family of enzymes that phosphorylate diacylglycerol to phosphatidic acid (PA). These lipids serve as second messengers, thereby activating distinct downstream cascades and different cellular responses. Therefore, DG-to-PA conversion activity induces a phase transition of signaling pathways. One member of the family, DGKζ, is involved closely with stress responses. Morphological data showing that DGKζ localizes predominantly to the nucleus and that it shuttles between the nucleus and the cytoplasm implicate DGKζ in the regulation of transcription factors during stress responses. Tumor suppressor p53 and NF-κB are major stress-responsive transcription factors. They exert opposing effects on cellular pathophysiology. Herein, we summarize DGKζ catalytic activity-dependent and -independent regulatory mechanisms of p53 and NF-κB transactivation activities, including p53 degradation and NF-κB nuclear translocation. We also discuss how each component of DGKζ-interacting protein complex modulates the specificity and selectivity of target gene expression.
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Homma T, Takeda Y, Nakano T, Akatsuka S, Kinoshita D, Kurahashi T, Saitoh S, Yamada KI, Miyata S, Asao H, Goto K, Watanabe T, Watanabe M, Toyokuni S, Fujii J. Defective biosynthesis of ascorbic acid in Sod1-deficient mice results in lethal damage to lung tissue. Free Radic Biol Med 2021; 162:255-265. [PMID: 33096250 DOI: 10.1016/j.freeradbiomed.2020.10.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 10/16/2020] [Accepted: 10/18/2020] [Indexed: 01/27/2023]
Abstract
Superoxide dismutase 1 (Sod1) plays pivotal roles in antioxidation via accelerating the conversion of superoxide anion radicals into hydrogen peroxide, thus inhibiting the subsequent radical chain reactions. While Sod1 deficient cells inevitably undergo death in culture conditions, Sod1-knockout (KO) mice show relatively mild phenotypes and live approximately two years. We hypothesized that the presence of abundant levels of ascorbic acid (AsA), which is naturally produced in mice, contributes to the elimination of reactive oxygen species (ROS) in Sod1-KO mice. To verify this hypothesis, we employed mice with a genetic ablation of aldehyde reductase (Akr1a), an enzyme that is involved in the biosynthesis of AsA, and established double knockout (DKO) mice that lack both Sod1 and Akr1a. Supplementation of AsA (1.5 mg/ml in drinking water) was required for the DKO mice to breed, and, upon terminating the AsA supplementation, they died within approximately two weeks regardless of age or gender. We explored the etiology of the death from pathophysiological standpoints in principal organs of the mice. Marked changes were observed in the lungs in the form of macroscopic damage after the AsA withdrawal. Histological and immunological analyses of the lungs indicated oxidative damage of tissue and activated immune responses. Thus, preferential oxidative injury that occurred in pulmonary tissues appeared to be primary cause of the death in the mice. These collective results suggest that the pivotal function of AsA in coping with ROS in vivo, is largely in pulmonary tissues that are exposed to a hyperoxygenic microenvironment.
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Hayashi T, Ikeda K, Sakamoto N, Sentani K, Hsi RS, Sekino Y, Kitano H, Goto K, Inoue S, Yasui W, Black PC, Teishima J. Transition of ANXA10 expression is a useful diagnostic and prognostic marker in upper tract urothelial carcinoma. Urol Oncol 2020. [DOI: 10.1016/j.urolonc.2020.10.047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Yamamoto N, Seto T, Nishio M, Goto K, Yamamoto N, Okamoto I, Yamanaka T, Tanaka M, Takahashi K, Fukuoka M. Erlotinib plus bevacizumab vs erlotinib monotherapy as first-line treatment for advanced EGFR mutation-positive non-squamous non-small-cell lung cancer: Survival follow-up results of the randomized JO25567 study. Lung Cancer 2020; 151:20-24. [PMID: 33279874 DOI: 10.1016/j.lungcan.2020.11.020] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 11/12/2020] [Accepted: 11/13/2020] [Indexed: 10/23/2022]
Abstract
OBJECTIVES The JO25567 randomized Phase II study demonstrated a statistically significant progression-free survival (PFS) benefit with erlotinib plus bevacizumab compared with erlotinib monotherapy in chemotherapy-naïve Japanese patients with epidermal growth factor receptor mutation-positive (EGFR+) non-small-cell lung cancer (NSCLC). Here we present updated PFS and final overall survival (OS) data after a median follow-up of 34.7 months. MATERIALS AND METHODS Patients with stage IIIB/IV or postoperative recurrent NSCLC were randomized to receive oral erlotinib 150 mg once daily (n = 77) or erlotinib in combination with intravenous bevacizumab 15 mg/kg every 21 days (n = 75) until disease progression or unacceptable toxicity. OS was analyzed using an unstratified Cox proportional hazards model. RESULTS Consistent with the primary analysis, addition of bevacizumab to erlotinib was associated with a significant improvement in PFS (hazard ratio [HR] 0.52; 95 % confidence interval [CI]: 0.35-0.76; log-rank two-sided P = 0.0005; median 16.4 months vs 9.8 months, respectively). In contrast, a significant improvement in OS was not seen (HR 0.81; 95 % CI, 0.53-1.23; P = 0.3267; median 47.0 months vs 47.4 months, respectively). Post-study therapy was similar between the treatment arms and EGFR mutation type did not affect OS outcomes. The 5-year OS rate was numerically higher with erlotinib plus bevacizumab vs erlotinib monotherapy (41 % vs 35 %). Updated safety analyses confirmed the previously reported manageable tolerability profile, with no new safety issues. CONCLUSION Addition of bevacizumab to first-line erlotinib did not show significant improvement in OS in Japanese patients with stage IIIB/IV or postoperative recurrent EGFR+ NSCLC. Both treatment arms showed a similar median OS benefit (as long as 4 years), irrespective of individual patient characteristics. Results from ongoing studies evaluating the combination of EGFR and VEGF signaling inhibitors are eagerly awaited. TRIAL REGISTRATION JapicCTI-111390 and JapicCTI-142569.
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Reck M, Spira A, Besse B, Wolf J, Skoulidis F, Borghaei H, Goto K, Park K, Griesinger F, Felip E, Boyer M, Barrios C, Goss G, Yang H, Obiozor C, Ramalingam S. 1416TiP CodeBreak 200: A phase III multicenter study of sotorasib (AMG 510), a KRAS(G12C) inhibitor, versus docetaxel in patients with previously treated advanced non-small cell lung cancer (NSCLC) harboring KRAS p.G12C mutation. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.1730] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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John T, Chiu CH, Cho B, Fakih M, Farago A, Demetri G, Goto K, Doebele R, Siena S, Drilon A, Patel M, Liu S, Ahn MJ, Bazhenova L, Overbeck T, Nieva J, Kim SW, Veronese L, Day BM, De Braud F. 364O Intracranial efficacy of entrectinib in patients with NTRK fusion-positive solid tumours and baseline CNS metastases. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.473] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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McCoach C, Tan D, Besse B, Goto K, Zhu V, Rolfo C, Farajian S, Potter L, Kherani J, Soldatenkova V, Olek E, Lee P, Park K. 1291P Hypersensitivity reactions (HR) to selpercatinib in RET fusion+ non-small cell lung cancer (NSCLC) patients (pts) following immune checkpoint inhibition (CPI). Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.1605] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Loong H, Goto K, Elamin Y, Solomon B, Santini F, Soldatenkova V, Sashegyi A, Lin AB, Lin B, Wolf J, Oxnard G, Zhou C, Drilon A, Park K. 1413TiP LIBRETTO-431: Selpercatinib in treatment (Tx)-naïve patients with RET fusion-positive (RET+) non-small cell lung cancer (NSCLC). Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.1727] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Inoue S, Hayashi T, Hieda K, Miyamoto S, Fujii S, Sekino Y, Kitano H, Ikeda K, Goto K, Teishima J, Matsubara A. Longitudinal analysis of conventional laparoscopic, posterior retroperitoneoscopic, and laparoendoscopic single-site adrenalectomy regarding cosmesis and satisfaction outcomes. EUR UROL SUPPL 2020. [DOI: 10.1016/s2666-1683(20)33186-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Kohada Y, Hayashi T, Hsi R, Yukihiro K, Sentani K, Goto K, Inoue S, Ohara S, Teishima J, Kajiwara M, Nishisaka T, Mikami J, Anan G, Ito J, Kaiho Y, Sato M, Yasui W, Akio M. Recurrence and progression free survival of intermediate risk NMIBC: The impact of conditional evaluation and sub-classification. EUR UROL SUPPL 2020. [DOI: 10.1016/s2666-1683(20)33546-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Nakamura Y, Namikawa K, Yoshino K, Yoshikawa S, Uchi H, Goto K, Nakamura Y, Fukushima S, Kiniwa Y, Takenouchi T, Uhara H, Kawai T, Hatta N, Funakoshi T, Teramoto Y, Otsuka A, Doi H, Ogata D, Matsushita S, Isei T, Hayashi T, Shibayama Y, Yamazaki N. Anti-PD1 checkpoint inhibitor therapy in acral melanoma: a multicenter study of 193 Japanese patients. Ann Oncol 2020; 31:1198-1206. [PMID: 32522691 DOI: 10.1016/j.annonc.2020.05.031] [Citation(s) in RCA: 85] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 05/04/2020] [Accepted: 05/28/2020] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Acral melanoma (AM) is an epidemiologically and molecularly distinct entity that is underrepresented in clinical trials on immunotherapy in melanoma. We aimed to analyze the efficacy of anti-programmed cell death 1 (anti-PD-1) antibodies in advanced AM. PATIENTS AND METHODS We retrospectively evaluated unresectable stage III or stage IV AM patients treated with an anti-PD-1 antibody in any line at 21 Japanese institutions between 2014 and 2018. The clinicobiologic characteristics, objective response rate (ORR, RECIST), survival estimated using Kaplan-Meier analysis, and toxicity (Common Terminology Criteria for Adverse Events 4.0.) were analyzed to estimate the efficacy of the anti-PD-1 antibodies. RESULTS In total, 193 patients (nail apparatus, 70; palm and sole, 123) were included in the study. Anti-PD-1 antibody was used as first-line therapy in 143 patients (74.1%). Baseline lactate dehydrogenase (LDH) was within the normal concentration in 102 patients (52.8%). The ORR of all patients was 16.6% (complete response, 3.1%; partial response, 13.5%), and the median overall survival (OS) was 18.1 months. Normal LDH concentrations showed a significantly stronger association with better OS than abnormal concentrations (median OS 24.9 versus 10.7 months; P < 0.001). Although baseline characteristics were similar between the nail apparatus and the palm and sole groups, ORR was significantly lower in the nail apparatus group [6/70 patients (8.6%) versus 26/123 patients (21.1%); P = 0.026]. Moreover, the median OS in this group was significantly poorer (12.8 versus 22.3 months; P = 0.03). CONCLUSIONS Anti-PD-1 antibodies have limited efficacy in AM patients. Notably, patients with nail apparatus melanoma had poorer response and survival, making nail apparatus melanoma a strong candidate for further research on the efficacy of novel combination therapies with immune checkpoint inhibitors.
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Oxnard G, Yang JH, Yu H, Kim SW, Saka H, Horn L, Goto K, Ohe Y, Mann H, Thress K, Frigault M, Vishwanathan K, Ghiorghiu D, Ramalingam S, Ahn MJ. TATTON: a multi-arm, phase Ib trial of osimertinib combined with selumetinib, savolitinib, or durvalumab in EGFR-mutant lung cancer. Ann Oncol 2020; 31:507-516. [DOI: 10.1016/j.annonc.2020.01.013] [Citation(s) in RCA: 136] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 01/06/2020] [Accepted: 01/15/2020] [Indexed: 01/18/2023] Open
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Akimoto R, Tanaka T, Nakano T, Hozumi Y, Kawamae K, Goto K. DGKζ depletion attenuates HIF-1α induction and SIRT1 expression, but enhances TAK1-mediated AMPKα phosphorylation under hypoxia. Cell Signal 2020; 71:109618. [PMID: 32224048 DOI: 10.1016/j.cellsig.2020.109618] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Revised: 03/21/2020] [Accepted: 03/25/2020] [Indexed: 12/31/2022]
Abstract
Cells cope with environmental changes through various mechanisms. Pathways involving HIF-1, SIRT1, and AMPK play major roles in energy homeostasis under stress conditions. Diacylglycerol kinase (DGK) constitutes an enzyme family that catalyzes conversion of diacylglycerol to phosphatidic acid. We reported earlier that energy depletion such as ischemia induces proteasomal degradation of DGKζ before cell death, suggesting involvement of DGKζ in energy homeostasis. This study examines how DGKζ depletion affects the regulation of HIF-1α, SIRT1, and AMPKα. Under hypoxia DGKζ depletion attenuates HIF-1α induction and SIRT1 expression, which might render cells vulnerable to energy stress. However, DGKζ depletion engenders enhanced AMPKα phosphorylation by upstream kinase TAK1 and an increase in intracellular ATP levels. Results suggest that DGKζ exerts a suppressive effect on TAK1 activity in the AMPK activation mechanism, and that DGKζ depletion might engender dysregulation of the AMPK-mediated energy sensor system.
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