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Targeting mTOR as a Cancer Therapy: Recent Advances in Natural Bioactive Compounds and Immunotherapy. Cancers (Basel) 2022; 14:cancers14225520. [PMID: 36428613 PMCID: PMC9688668 DOI: 10.3390/cancers14225520] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 11/01/2022] [Accepted: 11/02/2022] [Indexed: 11/12/2022] Open
Abstract
The mammalian target of rapamycin (mTOR) is a highly conserved serine/threonine-protein kinase, which regulates many biological processes related to metabolism, cancer, immune function, and aging. It is an essential protein kinase that belongs to the phosphoinositide-3-kinase (PI3K) family and has two known signaling complexes, mTOR complex 1 (mTORC1) and mTOR complex 2 (mTORC2). Even though mTOR signaling plays a critical role in promoting mitochondria-related protein synthesis, suppressing the catabolic process of autophagy, contributing to lipid metabolism, engaging in ribosome formation, and acting as a critical regulator of mRNA translation, it remains one of the significant signaling systems involved in the tumor process, particularly in apoptosis, cell cycle, and cancer cell proliferation. Therefore, the mTOR signaling system could be suggested as a cancer biomarker, and its targeting is important in anti-tumor therapy research. Indeed, its dysregulation is involved in different types of cancers such as colon, neck, cervical, head, lung, breast, reproductive, and bone cancers, as well as nasopharyngeal carcinoma. Moreover, recent investigations showed that targeting mTOR could be considered as cancer therapy. Accordingly, this review presents an overview of recent developments associated with the mTOR signaling pathway and its molecular involvement in various human cancer types. It also summarizes the research progress of different mTOR inhibitors, including natural and synthetised compounds and their main mechanisms, as well as the rational combinations with immunotherapies.
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Strnadová K, Pfeiferová L, Přikryl P, Dvořánková B, Vlčák E, Frýdlová J, Vokurka M, Novotný J, Šáchová J, Hradilová M, Brábek J, Šmigová J, Rösel D, Smetana K, Kolář M, Lacina L. Exosomes produced by melanoma cells significantly influence the biological properties of normal and cancer-associated fibroblasts. Histochem Cell Biol 2021; 157:153-172. [PMID: 34837514 PMCID: PMC8847298 DOI: 10.1007/s00418-021-02052-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/05/2021] [Indexed: 12/11/2022]
Abstract
The incidence of cutaneous malignant melanoma is increasing worldwide. While the treatment of initial stages of the disease is simple, the advanced disease frequently remains fatal despite novel therapeutic options . This requires identification of novel therapeutic targets in melanoma. Similarly to other types of tumours, the cancer microenvironment plays a prominent role and determines the biological properties of melanoma. Importantly, melanoma cell-produced exosomes represent an important tool of intercellular communication within this cancer ecosystem. We have focused on potential differences in the activity of exosomes produced by melanoma cells towards melanoma-associated fibroblasts and normal dermal fibroblasts. Cancer-associated fibroblasts were activated by the melanoma cell-produced exosomes significantly more than their normal counterparts, as assessed by increased transcription of genes for inflammation-supporting cytokines and chemokines, namely IL-6 or IL-8. We have observed that the response is dependent on the duration of the stimulus via exosomes and also on the quantity of exosomes. Our study demonstrates that melanoma-produced exosomes significantly stimulate the tumour-promoting proinflammatory activity of cancer-associated fibroblasts. This may represent a potential new target of oncologic therapy .
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Affiliation(s)
- Karolína Strnadová
- Institute of Anatomy, 1st Faculty of Medicine, Charles University, 128 00, Prague 2, Czech Republic.,BIOCEV, 1st Faculty of Medicine, Charles University, 25250, Vestec, Czech Republic
| | - Lucie Pfeiferová
- Laboratory of Genomics and Bioinformatics, Institute of Molecular Genetics of the Czech Academy of Sciences, 142 20, Prague 4, Czech Republic.,Department of Informatics and Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology, Prague, Czech Republic
| | - Petr Přikryl
- Institute of Pathological Physiology, 1st Faculty of Medicine, Charles University, 128 00, Praha, Czech Republic
| | - Barbora Dvořánková
- Institute of Anatomy, 1st Faculty of Medicine, Charles University, 128 00, Prague 2, Czech Republic.,BIOCEV, 1st Faculty of Medicine, Charles University, 25250, Vestec, Czech Republic
| | - Erik Vlčák
- Electron Microscopy Core Facility, Institute of Molecular Genetics of the Czech Academy of Sciences, 142 20, Prague 4, Czech Republic
| | - Jana Frýdlová
- Institute of Pathological Physiology, 1st Faculty of Medicine, Charles University, 128 00, Praha, Czech Republic
| | - Martin Vokurka
- Institute of Pathological Physiology, 1st Faculty of Medicine, Charles University, 128 00, Praha, Czech Republic
| | - Jiří Novotný
- Laboratory of Genomics and Bioinformatics, Institute of Molecular Genetics of the Czech Academy of Sciences, 142 20, Prague 4, Czech Republic.,Department of Informatics and Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology, Prague, Czech Republic
| | - Jana Šáchová
- Laboratory of Genomics and Bioinformatics, Institute of Molecular Genetics of the Czech Academy of Sciences, 142 20, Prague 4, Czech Republic
| | - Miluše Hradilová
- Laboratory of Genomics and Bioinformatics, Institute of Molecular Genetics of the Czech Academy of Sciences, 142 20, Prague 4, Czech Republic
| | - Jan Brábek
- BIOCEV, Faculty of Sciences, Charles University, 25250, Vestec, Czech Republic
| | - Jana Šmigová
- BIOCEV, Faculty of Sciences, Charles University, 25250, Vestec, Czech Republic
| | - Daniel Rösel
- BIOCEV, Faculty of Sciences, Charles University, 25250, Vestec, Czech Republic
| | - Karel Smetana
- Institute of Anatomy, 1st Faculty of Medicine, Charles University, 128 00, Prague 2, Czech Republic.,BIOCEV, 1st Faculty of Medicine, Charles University, 25250, Vestec, Czech Republic
| | - Michal Kolář
- Laboratory of Genomics and Bioinformatics, Institute of Molecular Genetics of the Czech Academy of Sciences, 142 20, Prague 4, Czech Republic. .,Department of Informatics and Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology, Prague, Czech Republic.
| | - Lukáš Lacina
- Institute of Anatomy, 1st Faculty of Medicine, Charles University, 128 00, Prague 2, Czech Republic. .,BIOCEV, 1st Faculty of Medicine, Charles University, 25250, Vestec, Czech Republic. .,Department of Dermatovenereology, 1st Faculty of Medicine, Charles University and General University Hospital, 120 00, Prague 2, Czech Republic.
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3
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Liao Y, Jia X, Ren Y, Deji Z, Gesang Y, Ning N, Feng H, Yu H, Wei A. Suppressive role of microRNA-130b-3p in ferroptosis in melanoma cells correlates with DKK1 inhibition and Nrf2-HO-1 pathway activation. Hum Cell 2021; 34:1532-1544. [PMID: 34117611 DOI: 10.1007/s13577-021-00557-5] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 05/24/2021] [Indexed: 10/21/2022]
Abstract
Cell death pathways related to ferroptosis are implicated in the progression of melanoma. Emerging data reporting the upregulation of microRNA (miR)-130b-3p in melanoma indicate the potential implication of miR-130b-3p in this malignancy. Herein, we aimed to identify whether and how miR-130b-3p regulated ferroptosis in melanoma cells. Melanoma cells (A375, G-361) were treated with erastin or RSL3 to mimic ferroptosis in vitro. Viability, lipid peroxidation level and ferrous ion content in melanoma cells were then assessed in response to manipulation of miR-130b-3p expression. Luciferase assay was conducted to determine the binding of miR-130b-3p to Dickkopf1 (DKK1). Western blot assay was conducted to determine the expression of molecules related to nuclear factor-erythroid 2 p45-related factor 2 (Nrf2)/heme oxygenase 1 (HO-1) pathway. The results indicated that miR-130b-3p exerted an inhibitory role in erastin or RSL3-induced ferroptosis, evidenced by reductions in lipid peroxidation and ferrous ion content. By suppressing the expression of target gene DKK1, miR-130b-3p activated the Nrf2/HO-1 pathway, whereby repressing ferroptosis. miR-130b-3p blocked the antitumor activity of erastin. Further, in vitro findings were reproduced in an in vivo murine model. Together, these data suggest the potential of miR-130b-3p to inhibit ferroptosis in melanoma cells and the mechanism was related to DKK1-mediated Nrf2/HO-1 pathway.
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Affiliation(s)
- Yangying Liao
- Department of Dermatology, Hunan Provincial People's HospitalThe First Affiliated Hospital of Hunan Normal University)Hunan Province, No. 61, Jiefang West Road, Changsha, 410005, People's Republic of China
| | - Xiaomin Jia
- Department of Pathology, Lhasa People's Hospital of Tibet Autonomous Region, Lhasa, 850000, People's Republic of China
| | - Yi Ren
- Beijing Jishuitan Hospital, Beijing, 100035, People's Republic of China
| | - Zhuoga Deji
- Department of Pathology, Lhasa People's Hospital of Tibet Autonomous Region, Lhasa, 850000, People's Republic of China
| | - Yuzhen Gesang
- Department of Pathology, Lhasa People's Hospital of Tibet Autonomous Region, Lhasa, 850000, People's Republic of China
| | - Ning Ning
- Medical Department, Hunan Provincial People's Hospital (The First Affiliated Hospital of Hunan Normal University), Changsha, 410005, People's Republic of China
| | - Hao Feng
- Department of Dermatology, Hunan Provincial People's HospitalThe First Affiliated Hospital of Hunan Normal University)Hunan Province, No. 61, Jiefang West Road, Changsha, 410005, People's Republic of China.
| | - Hong Yu
- Department of Pathology, The Third People's Hospital of Shenzhen, Shenzhen, 518100, People's Republic of China
| | - An Wei
- Department of Ultrasound, Hunan Provincial People's Hospital (The First Affiliated Hospital of Hunan Normal University), No. 61, Jiefang West Road, Changsha, 410005, Hunan Province, People's Republic of China.
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Abstract
Although vemurafenib has been shown to improve the overall survival of patients with metastatic melanoma harboring the BRAF V600E mutation, its efficacy is often hampered by drug resistance acquired within a relatively short period through several distinct mechanisms. In the present study, we investigated the effect of fluvastatin as a possible strategy to overcome such acquired resistance using a cultured cell line model. We established vemurafenib-resistant (VR) cells from three BRAF (V600E)-mutated melanoma lines (C32, HMY-1, and SK-MEL-28) and evaluated the mechanism of acquired resistance of VR cells by water-soluble tetrazolium salts assay, western blot, real-time quantitative PCR, and immunofluorescent microscopy. The efficacy of the combination of growth inhibitory effect of vemurafenib and fluvastatin on respective parental and VR cells were assessed by calculating combination index and western blot. IC50 values of three VR cells were ~5-100-fold higher than those for the respective parental cells. The VR cells derived from HMY-1 and SK-MEL-28 showed constitutive activation of AKT kinase, and the specific AKT inhibitor MK-2208 or the PI3K inhibitor wortmannin increased the cellular sensitivity to vemurafenib. Intriguingly, application of a statin-related drug, fluvastatin, also resulted in a synergistic increase of sensitivity to vemurafenib in the VR cells (combination index: 0.73-0.86) probably by alleviating constitutive AKT activation, whereas the same treatment did not notably alter the vemurafenib sensitivity of the parental cells. Our results suggest the possible usefulness of statin-related drugs for overcoming vemurafenib resistance acquired through constitutive activation of the PI3K-AKT axis.
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Zhai Z, Samson JM, Yamauchi T, Vaddi PK, Matsumoto Y, Dinarello CA, Ravindran Menon D, Fujita M. Inflammasome Sensor NLRP1 Confers Acquired Drug Resistance to Temozolomide in Human Melanoma. Cancers (Basel) 2020; 12:E2518. [PMID: 32899791 PMCID: PMC7563249 DOI: 10.3390/cancers12092518] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 09/01/2020] [Accepted: 09/01/2020] [Indexed: 01/13/2023] Open
Abstract
Cancer cells gain drug resistance through a complex mechanism, in which nuclear factor-κB (NF-κB) and interleukin-1β (IL-1β) are critical contributors. Because NACHT, LRR and PYD domains-containing protein (NLRP) inflammasomes mediate IL-1β maturation and NF-κB activation, we investigated the role of inflammasome sensor NLRP1 in acquired drug resistance to temozolomide (TMZ) in melanoma. The sensitivity of melanoma cells to TMZ was negatively correlated with the expression levels of O6-methylguanine-DNA methyltransferase (MGMT), the enzyme to repair TMZ-induced DNA lesions. When MGMT-low human melanoma cells (1205Lu and HS294T) were treated with TMZ for over two months, MGMT was upregulated, and cells became resistant. However, the resistance mechanism was independent of MGMT, and the cells that acquired TMZ resistance showed increased NLRP1 expression, NLRP inflammasome activation, IL-1β secretion, and NF-κB activity, which contributed to the acquired resistance to TMZ. Finally, blocking IL-1 receptor (IL-1R) signaling with IL-1R antagonist decreased TMZ-resistant 1205Lu tumor growth in vivo. Although inflammation has been associated with drug resistance in various cancers, our paper is the first to demonstrate the involvement of NLRP in the development of acquired drug resistance. Because drug-tolerant cancer cells become cross-tolerant to other classes of cancer drugs, NLRP1 might be a suitable therapeutic target in drug-resistant melanoma, as well as in other cancers.
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Affiliation(s)
- Zili Zhai
- Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA; (Z.Z.); (J.M.S.); (T.Y.); (P.K.V.); (Y.M.); (D.R.M.)
| | - Jenny Mae Samson
- Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA; (Z.Z.); (J.M.S.); (T.Y.); (P.K.V.); (Y.M.); (D.R.M.)
| | - Takeshi Yamauchi
- Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA; (Z.Z.); (J.M.S.); (T.Y.); (P.K.V.); (Y.M.); (D.R.M.)
| | - Prasanna K. Vaddi
- Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA; (Z.Z.); (J.M.S.); (T.Y.); (P.K.V.); (Y.M.); (D.R.M.)
| | - Yuko Matsumoto
- Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA; (Z.Z.); (J.M.S.); (T.Y.); (P.K.V.); (Y.M.); (D.R.M.)
| | - Charles A. Dinarello
- Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA;
| | - Dinoop Ravindran Menon
- Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA; (Z.Z.); (J.M.S.); (T.Y.); (P.K.V.); (Y.M.); (D.R.M.)
| | - Mayumi Fujita
- Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA; (Z.Z.); (J.M.S.); (T.Y.); (P.K.V.); (Y.M.); (D.R.M.)
- Department of Veterans Affairs Medical Center, VA Eastern Colorado Health Care System, Aurora, CO 80045, USA
- Department of Immunology & Microbiology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
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6
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Chamcheu JC, Roy T, Uddin MB, Banang-Mbeumi S, Chamcheu RCN, Walker AL, Liu YY, Huang S. Role and Therapeutic Targeting of the PI3K/Akt/mTOR Signaling Pathway in Skin Cancer: A Review of Current Status and Future Trends on Natural and Synthetic Agents Therapy. Cells 2019; 8:cells8080803. [PMID: 31370278 PMCID: PMC6721560 DOI: 10.3390/cells8080803] [Citation(s) in RCA: 116] [Impact Index Per Article: 23.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Revised: 07/26/2019] [Accepted: 07/29/2019] [Indexed: 12/16/2022] Open
Abstract
The mammalian or mechanistic target of rapamycin (mTOR) and associated phosphatidyl-inositiol 3-kinase (PI3K)/protein kinase B (Akt) pathways regulate cell growth, differentiation, migration, and survival, as well as angiogenesis and metabolism. Dysregulation of these pathways is frequently associated with genetic/epigenetic alterations and predicts poor treatment outcomes in a variety of human cancers including cutaneous malignancies like melanoma and non-melanoma skin cancers. Recently, the enhanced understanding of the molecular and genetic basis of skin dysfunction in patients with skin cancers has provided a strong basis for the development of novel therapeutic strategies for these obdurate groups of skin cancers. This review summarizes recent advances in the roles of PI3K/Akt/mTOR and their targets in the development and progression of a broad spectrum of cutaneous cancers and discusses the current progress in preclinical and clinical studies for the development of PI3K/Akt/mTOR targeted therapies with nutraceuticals and synthetic small molecule inhibitors.
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Affiliation(s)
| | - Tithi Roy
- College of Pharmacy, University of Louisiana at Monroe, Monroe, LA 71209-0497, USA
| | | | - Sergette Banang-Mbeumi
- College of Pharmacy, University of Louisiana at Monroe, Monroe, LA 71209-0497, USA
- Division for Research and Innovation, POHOFI Inc., P.O. Box 44067, Madison, WI 53744, USA
- School of Nursing and Allied Health Sciences, Louisiana Delta Community College, Monroe, LA 71203, USA
| | | | - Anthony L Walker
- College of Pharmacy, University of Louisiana at Monroe, Monroe, LA 71209-0497, USA
| | - Yong-Yu Liu
- College of Pharmacy, University of Louisiana at Monroe, Monroe, LA 71209-0497, USA
| | - Shile Huang
- Department of Biochemistry and Molecular Biology, Louisiana State University Health Sciences Center, 1501 Kings Highway, Shreveport, LA 71130-3932, USA
- Feist-Weiller Cancer Center, Louisiana State University Health Sciences Center, Shreveport, LA 71130-3932, USA
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7
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Tang H, Xu X, Xiao W, Liao Y, Xiao X, Li L, Li K, Jia X, Feng H. Silencing of microRNA-27a facilitates autophagy and apoptosis of melanoma cells through the activation of the SYK-dependent mTOR signaling pathway. J Cell Biochem 2019; 120:13262-13274. [PMID: 30994959 DOI: 10.1002/jcb.28600] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Accepted: 02/11/2019] [Indexed: 12/19/2022]
Abstract
Melanoma is considered as an aggressive neoplastic transformation and featured with high metastatic potential. Although some studies have provided targets for novel therapeutic interventions, clinical development of targeted drugs for melanoma still remains obscure. Therefore, this study aims to identify the role of microRNA-27a (miR-27a) in autophagy and apoptosis of melanoma cells in regulating spleen tyrosine kinase (SYK)-mediated the mammalian target of rapamycin (mTOR) signaling pathway. A microarray-based analysis was made to screen differentially expressed genes and predict target miRNA. Melanoma specimens were collected with pigmented nevus as a control. Melanoma cell line Mel-RM was treated with miR-27a inhibitor or pcDNA-SYK to prove their effects on autophagy and apoptosis of melanoma cells. The volume change and tumor mass of nude mice in each group were detected by the tumorigenesis assay. Microarray-based analysis results showed that SYK was lowly expressed in melanoma cells and may be regulated by miR-27a. Besides, miR-27a expression was increased whereas SYK expression was decreased in melanoma tissues. Meanwhile, miR-27a was positively correlated with tumor stage and lymph node metastasis of melanoma tissues. Furthermore, miR-27a targeted SYK and silencing of miR-27a or overexpression of SYK cells promoted autophagy and apoptosis of melanoma cells and reduced their tumorigenic ability in vivo. In conclusion, this study proves that silencing of miR-27a facilitates autophagy and apoptosis of melanoma cells by upregulating SYK expression and activating the mTOR signaling pathway. The finding offers new ideas for the clinical development of melanoma.
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Affiliation(s)
- Hua Tang
- Department of Dermatology, Hunan Provincial People's Hospital, The First Affiliated Hospital of Hunan Normal University, Changsha, P.R. China
| | - Xiaopeng Xu
- Department of Dermatology, Hunan Provincial People's Hospital, The First Affiliated Hospital of Hunan Normal University, Changsha, P.R. China
| | - Weirong Xiao
- Department of Dermatology, Hunan Provincial People's Hospital, The First Affiliated Hospital of Hunan Normal University, Changsha, P.R. China
| | - Yangying Liao
- Department of Dermatology, Hunan Provincial People's Hospital, The First Affiliated Hospital of Hunan Normal University, Changsha, P.R. China
| | - Xiao Xiao
- Department of Dermatology, Hunan Provincial People's Hospital, The First Affiliated Hospital of Hunan Normal University, Changsha, P.R. China
| | - Lan Li
- Department of Dermatology, Hunan Provincial People's Hospital, The First Affiliated Hospital of Hunan Normal University, Changsha, P.R. China
| | - Ke Li
- Department of Dermatology, Hunan Provincial People's Hospital, The First Affiliated Hospital of Hunan Normal University, Changsha, P.R. China
| | - Xiaomin Jia
- Department of Pathology, Hunan Provincial People's Hospital, The First Affiliated Hospital of Hunan Normal University, Changsha, P.R. China
| | - Hao Feng
- Department of Dermatology, Hunan Provincial People's Hospital, The First Affiliated Hospital of Hunan Normal University, Changsha, P.R. China
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Prakash R, Izraely S, Thareja NS, Lee RH, Rappaport M, Kawaguchi R, Sagi-Assif O, Ben-Menachem S, Meshel T, Machnicki M, Ohe S, Hoon DS, Coppola G, Witz IP, Carmichael ST. Regeneration Enhances Metastasis: A Novel Role for Neurovascular Signaling in Promoting Melanoma Brain Metastasis. Front Neurosci 2019; 13:297. [PMID: 31024232 PMCID: PMC6465799 DOI: 10.3389/fnins.2019.00297] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Accepted: 03/15/2019] [Indexed: 12/12/2022] Open
Abstract
Neural repair after stroke involves initiation of a cellular proliferative program in the form of angiogenesis, neurogenesis, and molecular growth signals in the surrounding tissue elements. This cellular environment constitutes a niche in which regeneration of new blood vessels and new neurons leads to partial tissue repair after stroke. Cancer metastasis has similar proliferative cellular events in the brain and other organs. Do cancer and CNS tissue repair share similar cellular processes? In this study, we identify a novel role of the regenerative neurovascular niche induced by stroke in promoting brain melanoma metastasis through enhancing cellular interactions with surrounding niche components. Repair-mediated neurovascular signaling induces metastatic cells to express genes crucial to metastasis. Mimicking stroke-like conditions in vitro displays an enhancement of metastatic migration potential and allows for the determination of cell-specific signals produced by the regenerative neurovascular niche. Comparative analysis of both in vitro and in vivo expression profiles reveals a major contribution of endothelial cells in mediating melanoma metastasis. These results point to a previously undiscovered role of the regenerative neurovascular niche in shaping the tumor microenvironment and brain metastatic landscape.
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Affiliation(s)
- Roshini Prakash
- Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States
| | - Sivan Izraely
- Department of Cell Research and Immunology, School of Molecular Cell Biology and Biotechnology, The George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Nikita S Thareja
- Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States
| | - Rex H Lee
- Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States
| | - Maya Rappaport
- Department of Cell Research and Immunology, School of Molecular Cell Biology and Biotechnology, The George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Riki Kawaguchi
- Department of Psychiatry and Biobehavioral Sciences, Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, Los Angeles, CA, United States
| | - Orit Sagi-Assif
- Department of Cell Research and Immunology, School of Molecular Cell Biology and Biotechnology, The George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Shlomit Ben-Menachem
- Department of Cell Research and Immunology, School of Molecular Cell Biology and Biotechnology, The George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Tsipi Meshel
- Department of Cell Research and Immunology, School of Molecular Cell Biology and Biotechnology, The George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Michal Machnicki
- Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States
| | - Shuichi Ohe
- Department of Translational Molecular Medicine, John Wayne Cancer Institute at Providence Saint John's Health Center, Santa Monica, CA, United States
| | - Dave S Hoon
- Department of Translational Molecular Medicine, John Wayne Cancer Institute at Providence Saint John's Health Center, Santa Monica, CA, United States
| | - Giovanni Coppola
- Department of Psychiatry and Biobehavioral Sciences, Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, Los Angeles, CA, United States
| | - Isaac P Witz
- Department of Cell Research and Immunology, School of Molecular Cell Biology and Biotechnology, The George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, Israel
| | - S Thomas Carmichael
- Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States
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9
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Lim HN, Baek SB, Jung HJ. Bee Venom and Its Peptide Component Melittin Suppress Growth and Migration of Melanoma Cells via Inhibition of PI3K/AKT/mTOR and MAPK Pathways. Molecules 2019; 24:molecules24050929. [PMID: 30866426 PMCID: PMC6429308 DOI: 10.3390/molecules24050929] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 02/28/2019] [Accepted: 03/03/2019] [Indexed: 01/28/2023] Open
Abstract
Malignant melanoma is the deadliest form of skin cancer and highly chemoresistant. Melittin, an amphiphilic peptide containing 26 amino acid residues, is the major active ingredient from bee venom (BV). Although melittin is known to have several biological activities such as anti-inflammatory, antibacterial and anticancer effects, its antimelanoma effect and underlying molecular mechanism have not been fully elucidated. In the current study, we investigated the inhibitory effect and action mechanism of BV and melittin against various melanoma cells including B16F10, A375SM and SK-MEL-28. BV and melittin potently suppressed the growth, clonogenic survival, migration and invasion of melanoma cells. They also reduced the melanin formation in α-melanocyte-stimulating hormone (MSH)-stimulated melanoma cells. Furthermore, BV and melittin induced the apoptosis of melanoma cells by enhancing the activities of caspase-3 and -9. In addition, we demonstrated that the antimelanoma effect of BV and melittin is associated with the downregulation of PI3K/AKT/mTOR and MAPK signaling pathways. We also found that the combination of melittin with the chemotherapeutic agent temozolomide (TMZ) significantly increases the inhibition of growth as well as invasion in melanoma cells compared to melittin or TMZ alone. Taken together, these results suggest that melittin could be potentially applied for the prevention and treatment of malignant melanoma.
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Affiliation(s)
- Haet Nim Lim
- Department of Pharmaceutical Engineering & Biotechnology, Sun Moon University, 70, Sunmoon-ro 221, Tangjeong-myeon, Asan-si, Chungnam 31460, Korea.
| | - Seung Bae Baek
- Eco system Lab., LOCORICO, Sun Moon University, 70, Sunmoon-ro 221, Tangjeong-myeon, Asan-si, Chungnam 31460, Korea.
| | - Hye Jin Jung
- Department of Pharmaceutical Engineering & Biotechnology, Sun Moon University, 70, Sunmoon-ro 221, Tangjeong-myeon, Asan-si, Chungnam 31460, Korea.
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10
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Chae WJ, Park JH, Henegariu O, Yilmaz S, Hao L, Bothwell ALM. Membrane-bound Dickkopf-1 in Foxp3 + regulatory T cells suppresses T-cell-mediated autoimmune colitis. Immunology 2017; 152:265-275. [PMID: 28556921 PMCID: PMC5588763 DOI: 10.1111/imm.12766] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 05/23/2017] [Accepted: 05/25/2017] [Indexed: 12/14/2022] Open
Abstract
Induction of tolerance is a key mechanism to maintain or to restore immunological homeostasis. Here we show that Foxp3+ regulatory T (Treg) cells use Dickkopf‐1 (DKK‐1) to regulate T‐cell‐mediated tolerance in the T‐cell‐mediated autoimmune colitis model. Treg cells from DKK‐1 hypomorphic doubleridge mice failed to control CD4+ T‐cell proliferation, resulting in CD4 T‐cell‐mediated autoimmune colitis. Thymus‐derived Treg cells showed a robust expression of DKK‐1 but not in naive or effector CD4 T cells. DKK‐1 expression in Foxp3+ Treg cells was further increased upon T‐cell receptor stimulation in vitro and in vivo. Interestingly, Foxp3+ Treg cells expressed DKK‐1 in the cell membrane and the functional inhibition of DKK‐1 using DKK‐1 monoclonal antibody abrogated the suppressor function of Foxp3+ Treg cells. DKK‐1 expression was dependent on de novo protein synthesis and regulated by the mitogen‐activated protein kinase pathway but not by the canonical Wnt pathway. Taken together, our results highlight membrane‐bound DKK‐1 as a novel Treg‐derived mediator to maintain immunological tolerance in T‐cell‐mediated autoimmune colitis.
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Affiliation(s)
- Wook-Jin Chae
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT, USA
| | - Jong-Hyun Park
- Convergence Research Centre for Diagnosis, Treatment and Care System of Dementia, KIST (Korea Institute of Science and Technology), Seoul, Korea
| | - Octavian Henegariu
- Department of Neurosurgery, Yale University School of Medicine, New Haven, CT, USA
| | - Saliha Yilmaz
- Department of Neurosurgery, Yale University School of Medicine, New Haven, CT, USA
| | - Liming Hao
- Department of Pathology, Yale University School of Medicine, New Haven, CT, USA
| | - Alfred L M Bothwell
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT, USA
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