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Liu J, Gao Y, Zhang X. A patent review on hypoxia-inducible factor (HIF) modulators (2021-2023). Expert Opin Ther Pat 2024; 34:651-664. [PMID: 38874005 DOI: 10.1080/13543776.2024.2368739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Accepted: 06/12/2024] [Indexed: 06/15/2024]
Abstract
INTRODUCTION Hypoxia-inducible factor (HIF) is a central regulatory factor in detecting and adapting to cellular oxygen stress. Dysregulation of HIF is associated with various human diseases. Seven HIF modulators, including six prolyl hydroxylase (PHD) inhibitors and one HIF-2α inhibitor, have already been approved for the treatment of renal anemia and cancer, respectively. AREAS COVERED This review summarizes HIF modulators patented in the 2021-2023 period. This review provides an overview of HIF downregulators, including HIF-1α inhibitors, HIF-2α inhibitors, and HIF-2α degraders, as well as HIF upregulators, including PHD, FIH, and VHL inhibitors, and HIF-2α and HIF-3α agonists. EXPERT OPINION Efforts should be made to address the adverse clinical effects associated with approved HIF-modulating drugs, including PHD inhibitors and HIF-2α inhibitors. Identification of the specific buried cavity in the HIF-2α and an opened pocket in HIF-3α offer an avenue for designing novel modulators for HIF-2α or HIF-3α. Given the similarities observed in the binding cavities of HIF-2α and HIF-3α, it should be considered whether the approved HIF-2α inhibitors also inhibit HIF-3α. A comprehensive understanding of the HIF signaling pathway biology would lead to the development of novel small-molecule HIF modulators as innovative therapeutic approaches for a wide range of human diseases.
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Affiliation(s)
| | - Yinli Gao
- Jiangsu Key Laboratory of Drug Design and Optimization, and Department of Chemistry, China Pharmaceutical University, Nanjing, China
| | - Xiaojin Zhang
- Jiangsu Key Laboratory of Drug Design and Optimization, and Department of Chemistry, China Pharmaceutical University, Nanjing, China
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Uchihara M, Tanabe A, Kojima Y, Shimoi T, Maeshima AM, Umamoto K, Shimomura A, Shimizu C, Yamazaki Y, Nakamura E, Matsui Y, Takemura N, Miyazaki H, Sudo K, Yonemori K, Kajio H. Immunohistochemical Profiling of SSTR2 and HIF-2α with the Tumor Microenvironment in Pheochromocytoma and Paraganglioma. Cancers (Basel) 2024; 16:2191. [PMID: 38927897 PMCID: PMC11201597 DOI: 10.3390/cancers16122191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2024] [Revised: 06/03/2024] [Accepted: 06/09/2024] [Indexed: 06/28/2024] Open
Abstract
Metastatic pheochromocytomas and paragangliomas (PPGLs) are rare endocrine malignancies with limited effective treatment options. The association between the tumor microenvironment (TME) with somatostatin receptor 2 (SSTR2) and hypoxia-induced factor-2α (HIF-2α) in PPGLs, critical for optimizing combination therapeutic strategies with immunotherapy, remains largely unexplored. To evaluate the association of SSTR2 and HIF-2α immunoreactivity with the TME in patients with PPGLs, we analyzed the expression of SSTR2A, HIF-2α, and TME components, including tumor-infiltrating lymphocytes (CD4 and CD8), tumor-associated macrophages (CD68 and CD163), and PD-L1, using immunohistochemistry in patients with PPGLs. The primary outcome was to determine the association of the immune profiles with SSTR2A and HIF-2α expression. Among 45 patients with PPGLs, SSTR2A and HIF2α were positively expressed in 21 (46.7%) and 14 (31.1%) patients, respectively. The median PD-L1 immunohistochemical score (IHS) was 2.0 (interquartile range: 0-30.0). Positive correlations were observed between CD4, CD8, CD68, and CD163 levels. A negative correlation was found between the CD163/CD68 ratio (an indicator of M2 polarization) and SSTR2A expression (r = -0.385, p = 0.006). HIF-2α expression showed a positive correlation with PD-L1 IHS (r = 0.348, p = 0.013). The co-expression of PD-L1 (HIS > 10) and HIF-2α was found in seven patients (15.6%). No associations were observed between SDHB staining results and the CD163/CD68 ratio, PD-L1, or SSTR2A expression. Our data suggest the potential of combination therapy with immunotherapy and peptide receptor radionuclide therapy or HIF-2α inhibitors as a treatment option in selected PPGL populations.
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Affiliation(s)
- Masaki Uchihara
- Department of Diabetes, Endocrinology and Metabolism, National Center for Global Health and Medicine, Toyama 1-21-1, Shinjuku-ku City, Tokyo 162-8655, Japan; (M.U.)
- Course of Advanced and Specialized Medicine, Juntendo University Graduate School of Medicine, 3-1-3 Hongoh, Bunkyo-ku, Tokyo 113-0033, Japan (C.S.)
- Department of General Internal Medicine, Oncological Endocrinology, National Cancer Center Hospital, Tsukiji 5-1-1, Chuo-ku, Tokyo 104-0045, Japan
| | - Akiyo Tanabe
- Department of Diabetes, Endocrinology and Metabolism, National Center for Global Health and Medicine, Toyama 1-21-1, Shinjuku-ku City, Tokyo 162-8655, Japan; (M.U.)
| | - Yuki Kojima
- Department of Medical Oncology, National Cancer Center Hospital, Tsukiji 5-1-1, Chuo-ku, Tokyo 104-0045, Japan (T.S.)
| | - Tatsunori Shimoi
- Department of Medical Oncology, National Cancer Center Hospital, Tsukiji 5-1-1, Chuo-ku, Tokyo 104-0045, Japan (T.S.)
| | - Akiko Miyagi Maeshima
- Department of Diagnostic Pathology, National Cancer Center Hospital, Tsukiji 5-1-1, Chuo-ku, Tokyo 104-0045, Japan
| | - Kotaro Umamoto
- Department of Diabetes, Endocrinology and Metabolism, National Center for Global Health and Medicine, Toyama 1-21-1, Shinjuku-ku City, Tokyo 162-8655, Japan; (M.U.)
- Department of General Internal Medicine, Oncological Endocrinology, National Cancer Center Hospital, Tsukiji 5-1-1, Chuo-ku, Tokyo 104-0045, Japan
| | - Akihiko Shimomura
- Course of Advanced and Specialized Medicine, Juntendo University Graduate School of Medicine, 3-1-3 Hongoh, Bunkyo-ku, Tokyo 113-0033, Japan (C.S.)
- Department of Breast and Medical Oncology, National Center for Global Health and Medicine, Toyama 1-21-1, Shinjuku-ku City, Tokyo 162-8655, Japan
| | - Chikako Shimizu
- Course of Advanced and Specialized Medicine, Juntendo University Graduate School of Medicine, 3-1-3 Hongoh, Bunkyo-ku, Tokyo 113-0033, Japan (C.S.)
- Department of Breast and Medical Oncology, National Center for Global Health and Medicine, Toyama 1-21-1, Shinjuku-ku City, Tokyo 162-8655, Japan
| | - Yuto Yamazaki
- Department of Pathology, Tohoku University Graduate School of Medicine, Seiryo-machi 2-1, Aoba-ku, Sendai, Miyagi 980-8575, Japan
| | - Eijiro Nakamura
- Department of Medical Oncology, National Cancer Center Hospital, Tsukiji 5-1-1, Chuo-ku, Tokyo 104-0045, Japan (T.S.)
- Department of Urology, National Cancer Center Hospital, Tsukiji 5-1-1, Chuo-ku, Tokyo 104-0045, Japan
| | - Yoshiyuki Matsui
- Department of Urology, National Cancer Center Hospital, Tsukiji 5-1-1, Chuo-ku, Tokyo 104-0045, Japan
| | - Nobuyuki Takemura
- Hepato-Biliary-Pancreatic Surgery Division, Department of Surgery, National Center for Global Health and Medicine, Toyama 1-21-1, Shinjuku-ku City, Tokyo 162-8655, Japan
| | - Hideyo Miyazaki
- Department of Urology, National Center for Global Health and Medicine, Toyama 1-21-1, Shinjuku-ku City, Tokyo 162-8655, Japan
| | - Kazuki Sudo
- Department of Medical Oncology, National Cancer Center Hospital, Tsukiji 5-1-1, Chuo-ku, Tokyo 104-0045, Japan (T.S.)
| | - Kan Yonemori
- Department of Medical Oncology, National Cancer Center Hospital, Tsukiji 5-1-1, Chuo-ku, Tokyo 104-0045, Japan (T.S.)
| | - Hiroshi Kajio
- Department of Diabetes, Endocrinology and Metabolism, National Center for Global Health and Medicine, Toyama 1-21-1, Shinjuku-ku City, Tokyo 162-8655, Japan; (M.U.)
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Cao K, Yuan W, Hou C, Wang Z, Yu J, Wang T. Hypoxic Signaling Pathways in Carotid Body Tumors. Cancers (Basel) 2024; 16:584. [PMID: 38339335 PMCID: PMC10854715 DOI: 10.3390/cancers16030584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 12/06/2023] [Accepted: 01/23/2024] [Indexed: 02/12/2024] Open
Abstract
Carotid body tumors (CBTs) are rare tumors with a 1-2 incidence per 100,000 individuals. CBTs may initially present without apparent symptoms, and symptoms begin to arise since tumors grow bigger to compress surrounding tissue, such as recurrent laryngeal nerve and esophagus. Also, the etiology of CBTs remains unclear since it is more likely to occur in those who live in high-altitude areas or suffer from chronic hypoxic diseases such as COPD. SDH mutations and familial inheritance have been reported to be related to CBTs. SDH complexes play crucial roles in aerobic respiration, and SDH mutations in CBTs have been reported to be associated with hypoxia. Hypoxic signaling pathways, specifically hypoxic markers, have attracted more research attention in tumor exploration. However, the existing literature on these signaling and markers lacks a systematic review. Also, therapeutic approaches in CBTs based on hypoxic signaling are rarely used in clinics. In this review, we concluded the role of hypoxic signaling and markers and their potential implications in the initiation and progression of CBTs. Our findings underscore the involvement of the SDH family, the HIF family, VEGFs, and inflammatory cytokines (ICs) in tumorigenesis and treatment. Of particular interest is the role played by SDHx, which has recently been linked to oxygen sensing through mutations leading to hereditary CBTs. Among the SDH family, SDHB and SDHD exhibit remarkable characteristics associated with metastasis and multiple tumors. Besides SDH mutations in CBTs, the HIF family also plays crucial roles in CBTs via hypoxic signaling pathways. The HIF family regulates angiogenesis during mammalian development and tumor growth by gene expression in CBTs. HIF1α could induce the transcription of pyruvate dehydrogenase kinase 1 (PDK1) to inhibit pyruvate dehydrogenase kinase (PDH) by inhibiting the TCA cycle. Then, carotid body cells begin to hyperplasia and hypertrophy. At the same time, EPAS1 mutation, an activating mutation, could decrease the degradation of HIF2α and result in Pacak-Zhuang syndrome, which could result in paraganglioma. HIFs can also activate VEGF expression, and VEGFs act on Flk-1 to control the hyperplasia of type I cells and promote neovascularization. ICs also play a pivotal signaling role within the CB, as their expression is induced under hypoxic conditions to stimulate CB hyperplasia, ultimately leading to CBTs detecting hypoxic areas in tumors, and improving the hypoxic condition could enhance photon radiotherapy efficacy. Moreover, this review offers valuable insights for future research directions on understanding the relationship between hypoxic signaling pathways and CBTs.
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Affiliation(s)
| | | | | | | | | | - Tao Wang
- Department of Neurosurgery, Peking University Third Hospital, Beijing 100191, China; (K.C.); (W.Y.); (C.H.); (Z.W.); (J.Y.)
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Chan KH, Li N, Lador R, Amsbaugh M, Gonzalez A, Cen P. Belzutifan, HIF-2α Inhibitor, and Clear Cell Renal Cell Carcinoma With Somatic Von-Hippel-Lindau Loss-of-Function Mutation. J Investig Med High Impact Case Rep 2024; 12:23247096241231641. [PMID: 38344974 PMCID: PMC10863383 DOI: 10.1177/23247096241231641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 01/20/2024] [Accepted: 01/23/2024] [Indexed: 02/15/2024] Open
Abstract
The Von-Hippel-Lindau (VHL) gene, acting as a tumor suppressor, plays a crucial role in the tumorigenesis of clear cell renal cell carcinoma (ccRCC). Approximately 90% of individuals with advanced ccRCC exhibit somatic mutations in the VHL gene. Belzutifan, orally administered small-molecule inhibitor of hypoxia-induced factor-2α, has demonstrated promising efficacy in solid tumors associated with germline loss-of-function mutations in VHL, including ccRCC. However, its impact on cases with somatic or sporadic VHL mutations remains unclear. Here, we present 2 cases where belzutifan monotherapy was employed in patients with advanced ccRCC and somatic loss-of-function mutations in VHL. Both patients exhibited a swift and sustained response, underscoring the potential role of belzutifan as a viable option in second or subsequent lines of therapy for individuals with somatic VHL mutations. Despite both patients experiencing a pulmonary crisis with respiratory compromise, their rapid response to belzutifan further emphasizes its potential utility in cases involving pulmonary or visceral crises. This report contributes valuable insights into the treatment landscape for advanced ccRCC with somatic VHL mutations.
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Affiliation(s)
- Kok Hoe Chan
- The University of Texas Health Science Center at Houston, USA
| | - Ningjing Li
- The University of Texas Health Science Center at Houston, USA
| | - Ran Lador
- The University of Texas Health Science Center at Houston, USA
| | - Mark Amsbaugh
- The University of Texas Health Science Center at Houston, USA
| | | | - Putao Cen
- The University of Texas Health Science Center at Houston, USA
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Sweeney PL, Suri Y, Basu A, Koshkin VS, Desai A. Mechanisms of tyrosine kinase inhibitor resistance in renal cell carcinoma. CANCER DRUG RESISTANCE (ALHAMBRA, CALIF.) 2023; 6:858-873. [PMID: 38239394 PMCID: PMC10792482 DOI: 10.20517/cdr.2023.89] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 11/20/2023] [Accepted: 12/21/2023] [Indexed: 01/22/2024]
Abstract
Renal cell carcinoma (RCC), the most prevalent type of kidney cancer, is a significant cause of cancer morbidity and mortality worldwide. Antiangiogenic tyrosine kinase inhibitors (TKIs), in combination with immune checkpoint inhibitors (ICIs), are among the first-line treatment options for patients with advanced RCC. These therapies target the vascular endothelial growth factor receptor (VEGFR) tyrosine kinase pathway and other kinases crucial to cancer proliferation, survival, and metastasis. TKIs have yielded substantial improvements in progression-free survival (PFS) and overall survival (OS) for patients with advanced RCC. However, nearly all patients eventually progress on these drugs as resistance develops. This review provides an overview of TKI resistance in RCC and explores different mechanisms of resistance, including upregulation of alternative proangiogenic pathways, epithelial-mesenchymal transition (EMT), decreased intracellular drug concentrations due to efflux pumps and lysosomal sequestration, alterations in the tumor microenvironment including bone marrow-derived cells (BMDCs) and tumor-associated fibroblasts (TAFs), and genetic factors such as single nucleotide polymorphisms (SNPs). A comprehensive understanding of these mechanisms opens the door to the development of innovative therapeutic approaches that can effectively overcome TKI resistance, thereby improving outcomes for patients with advanced RCC.
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Affiliation(s)
- Patrick L. Sweeney
- Deming Department of Medicine, Tulane University School of Medicine, New Orleans, LA 70112, USA
| | - Yash Suri
- University of Arizona College of Medicine, Tucson, AZ 85724, USA
| | - Arnab Basu
- Division of Hematology and Oncology, Department of Medicine, University of Alabama at Birmingham Heersink School of Medicine, Birmingham, AL 35233, USA
| | - Vadim S. Koshkin
- Division of Hematology and Oncology, Department of Medicine, University of California at San Francisco School of Medicine, San Francisco, CA 94143, USA
| | - Arpita Desai
- Division of Hematology and Oncology, Department of Medicine, University of California at San Francisco School of Medicine, San Francisco, CA 94143, USA
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