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Pan T, Chang Y, He M, He Z, Jiang J, Ren X, Zhang F. β-Hydroxyisovalerylshikonin regulates macrophage polarization via the AMPK/Nrf2 pathway and ameliorates sepsis in mice. PHARMACEUTICAL BIOLOGY 2022; 60:729-742. [PMID: 35352622 PMCID: PMC8973340 DOI: 10.1080/13880209.2022.2046111] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 02/14/2022] [Accepted: 02/19/2022] [Indexed: 06/14/2023]
Abstract
CONTEXT The potential anti-inflammatory bioactivities of β-hydroxyisovalerylshikonin (β-HIVS) remain largely unknown. OBJECTIVE This study investigated the anti-inflammatory effects and underlying mechanisms of β-HIVS. MATERIALS AND METHODS RAW 264.7 cells stimulated with LPS (100 ng/mL) for 24 h were treated with the non-cytotoxic doses of β-HIVS (0.5 or 1 μM, determined by MTT and Trypan blue staining), qRT-PCR and FCM assay were used to examine macrophage polarization transitions. Western blotting was used to evaluate the activation of the AMPK/Nrf2 pathway. In vivo, C57BL/6 mice were randomly divided into vehicle control, LPS (10 mg/kg), and β-HIVS (2.5 mg/kg) combined with LPS (10 mg/kg) groups, blood samples, BALF, and lung tissues of mice were subjected to ELISA, qRT-PCR, FCM, and H&E staining. RESULTS β-HIVS (1 μM) inhibited LPS-induced expression of M1 macrophage markers (TNF-α: 0.29-fold, IL-1β: 0.32-fold), promoted the expression of M2 macrophage markers (CD206: 3.14-fold, Arginase-1: 3.98-fold) in RAW 264.7 cells; mechanistic studies showed that β-HIVS increased the expression of nuclear Nrf2 (2.04-fold) and p-AMPK (3.65-fold) compared with LPS group (p < 0.05). In vivo, β-HIVS decreased the levels of pro-inflammatory cytokines (TNF-α: 1130.41 vs. 334.88 pg/mL, IL-1β: 601.89 vs. 258.21 pg/mL in serum; TNF-α: 893.07 vs. 418.21 pg/mL, IL-1β: 475.22 vs. 298.54 pg/mL in BALF), decreased the proportion of M1 macrophages (77.83 vs. 68.53%) and increased the proportion of M2 macrophages (13.55 vs. 19.56%) in BALF, and reduced lung tissue damage and septic mice survival (p < 0.05). CONCLUSIONS These results indicate that β-HIVS may be a new potential anti-inflammatory agent.
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Affiliation(s)
- Tao Pan
- Translational Medicine Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
- Department of Respiratory Medicine, Xijing Hospital, Air Force Medical University, Xi'an, Shaanxi, China
- Shaanxi Key Laboratory of Brain Disorders, Institute of Basic Medical Sciences, Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an, Shaanxi, China
| | - Yabin Chang
- Translational Medicine Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Min He
- Translational Medicine Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Zehui He
- Translational Medicine Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Jun Jiang
- Department of Respiratory Medicine, Xijing Hospital, Air Force Medical University, Xi'an, Shaanxi, China
| | - Xinling Ren
- Department of Respiratory Medicine, Xijing Hospital, Air Force Medical University, Xi'an, Shaanxi, China
- Carson International Cancer Center, Shenzhen University, Shenzhen, Guangdong, China
- Shenzhen University Clinical Medical Academy, Shenzhen, Guangdong, China
| | - Fang Zhang
- Department of Respiratory Medicine, Xijing Hospital, Air Force Medical University, Xi'an, Shaanxi, China
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Zeng Y, Zhang H, Zhu M, Pu Q, Li J, Hu X. β-Hydroxyisovaleryl-Shikonin Exerts an Antitumor Effect on Pancreatic Cancer Through the PI3K/AKT Signaling Pathway. Front Oncol 2022; 12:904258. [PMID: 35860565 PMCID: PMC9293047 DOI: 10.3389/fonc.2022.904258] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Accepted: 05/02/2022] [Indexed: 12/17/2022] Open
Abstract
Pancreatic cancer (PC) is marked with a low survival rate and lack of recognized effective treatment strategy. We investigated the antitumor effect of β-hydroxyisovaleryl-shikonin (β-HIVS) on PC and the associated working mechanism. Cell toxicity was determined using Cell Counting Kit-8 (CCK-8) assay. Acridine Orange/Ethidium Bromide (AO/EB) double-fluorescent staining assay accompanied by flow cytometry was utilized to estimate cell apoptosis. Cell cycle, reactive oxygen species (ROS), and mitochondrial membrane potential were all evaluated using flow cytometry. Transwell and wound healing assays were performed to evaluate cell migration and invasion. Protein expression was analyzed by Western blots. A xenograft mouse model was employed to determine the antitumor effect of β-HIVS in vivo. PC cell viability gradually decreased with increasing β-HIVS while apoptosis was enhanced together with cell-cycle blockage in the G0–G1 phases. β-HIVS induced mitochondrial dysfunction, ROS production, and DNA damage and inhibited the invasive and migratory ability of PC cells. We further confirmed the suppression of EMT and PI3K/AKT pathways as underlying mechanisms. The mouse model treated with the increasing dose of β-HIVS displayed decreased tumor growth rate, along with increased apoptosis. Thus, β-HIVS exerts antitumor effects on PC through inducing apoptosis, ROS production, decreasing mitochondrial membrane potential, and suppressing signal pathways, such as PI3K/AKT. In summary, β-HIVS might be a promising strategy for PC treatment.
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Shikonin induces programmed death of fibroblast synovial cells in rheumatoid arthritis by inhibiting energy pathways. Sci Rep 2021; 11:18263. [PMID: 34521930 PMCID: PMC8440543 DOI: 10.1038/s41598-021-97713-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 06/21/2021] [Indexed: 01/31/2023] Open
Abstract
Shikonin is the main component of the traditional Chinese medicine comfrey, which can inhibit the activity of PKM2 by regulating glycolysis and ATP production. Rheumatoid arthritis synovial cells (RA-FLSs) have been reported to increase glycolytic activity and have other similar hallmarks of metabolic activity. In this study, we investigated the effects of shikonin on glycolysis, mitochondrial function, and cell death in RA-FLSs. The results showed that shikonin induced apoptosis and autophagy in RA-FLSs by activating the production of reactive oxygen species (ROS) and inhibiting intracellular ATP levels, glycolysis-related proteins, and the PI3K-AKT-mTOR signaling pathway. Shikonin can significantly reduce the expression of apoptosis-related proteins, paw swelling in rat arthritic tissues, and the levels of inflammatory factors in peripheral blood, such as TNF-α, IL-6, IL-8, IL-10, IL-17A, and IL-1β while showing less toxicity to the liver and kidney.
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Chen X, Gu M, Jin J, Ren C, Pan Z, Wu Y, Tian N, Wu A, Sun L, Gao W, Wang X, Bei C, Zhou Y, Zhang X. β-Hydroxyisovalerylshikonin inhibits IL-1β-induced chondrocyte inflammation via Nrf2 and retards osteoarthritis in mice. Food Funct 2021; 11:10219-10230. [PMID: 33169745 DOI: 10.1039/d0fo02192j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Osteoarthritis is a chronic degenerative disease characterized by cartilage destruction. It is the fourth most disabling disease worldwide and is currently incurable. Inflammation and extracellular matrix (ECM) degradation are considered to be substantial reasons for accelerating the progression of OA. β-Hydroxyisoamylshikonin (β-HIVS) is a natural naphthoquinone compound with anti-inflammatory and antioxidant activity. However, the effect of β-HIVS on OA is still unclear. In this study, we found that β-HIVS can down-regulate the expression of NO, PEG2, IL-6, TNF-α, COX-2, and iNOS, suggesting its anti-inflammatory effects in chondrocytes; we also found that β-HIVS may down-regulate the expression of ADAMTS5 and MMP13 and up-regulate the expression of aggrecan and collagen II to inhibit the degradation of ECM. Mechanistically, β-HIVS inhibited the NFκB pathway by activating the Nrf2/HO-1 axis, thereby exerting its anti-inflammatory and inhibitory effects on ECM degradation. In vivo experiments also proved the therapeutic effects of β-HIVS on OA in mice, and Nrf2 is the target of β-HIVS. These findings indicate that β-HIVS may become a new drug for the treatment of OA.
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Affiliation(s)
- Ximiao Chen
- Department of Orthopaedics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province, China.
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Ono M, Abe S, Higai K, Higashi S, Saito S, Saito R. An improved and practical synthesis route to antiproliferative (±)-shikonin and its O-acyl derivatives. SYNTHETIC COMMUN 2020. [DOI: 10.1080/00397911.2020.1853171] [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]
Affiliation(s)
- Mana Ono
- Department of Chemistry, Toho University, Funabashi, Chiba, Japan
| | - Shouki Abe
- Department of Chemistry, Toho University, Funabashi, Chiba, Japan
| | - Koji Higai
- Faculty of Pharmaceutical Sciences, Toho University, Funabashi, Chiba, Japan
| | - Shoko Higashi
- Department of Chemistry, Toho University, Funabashi, Chiba, Japan
| | - Setsuo Saito
- Faculty of Pharmaceutical Sciences, Josai University, Sakado, Saitama, Japan
| | - Ryota Saito
- Department of Chemistry, Toho University, Funabashi, Chiba, Japan
- Research Center for Materials with Integrated Properties, Toho University, Funabashi, Chiba, Japan
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Munni YA, Ali MC, Selsi NJ, Sultana M, Hossen M, Bipasha TH, Rahman M, Uddin MN, Hosen SMZ, Dash R. Molecular simulation studies to reveal the binding mechanisms of shikonin derivatives inhibiting VEGFR-2 kinase. Comput Biol Chem 2020; 90:107414. [PMID: 33191109 DOI: 10.1016/j.compbiolchem.2020.107414] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Revised: 10/17/2020] [Accepted: 10/29/2020] [Indexed: 12/20/2022]
Abstract
Traditional vascular endothelial growth factor receptor 2 (VEGFR-2) inhibitors can manage angiogenesis; however, severe toxicity and resistance limit their long-term applications in clinical therapy. Shikonin (SHK) and its derivatives could be promising to inhibit the VEGFR-2 mediated angiogenesis, as they are reported to bind in the catalytic kinase domain with low affinity. However, the detailed molecular insights and binding dynamics of these natural inhibitors are unknown, which is crucial for potential SHK based lead design. Therefore, the present study employed molecular modeling and simulations techniques to get insight into the binding behaviors of SHK and its two derivates, β-hydroxyisovalerylshikonin (β-HIVS) and acetylshikonin (ACS). Here the intermolecular interactions between protein and ligands were studied by induced fit docking approach, which were further evaluated by treating QM/MM (quantum mechanics/molecular mechanics) and molecular dynamics (MD) simulation. The result showed that the naphthazarin ring of the SHK derivates is vital for strong binding to the catalytic domain; however, the binding stability can be modulated by the side chain modification. Because of having electrostatic potential, this ring makes essential interactions with the DFG (Asp1046 and Phe1047) motif and also allows interacting with the allosteric binding site. Taken together, the studies will advance our knowledge and scope for the development of new selective VEGFR-2 inhibitors based on SHK and its analogs.
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Affiliation(s)
- Yeasmin Akter Munni
- Department of Anatomy, Dongguk University College of Medicine, Gyeongju, 38066, Republic of Korea.
| | - Md Chayan Ali
- Department of Biotechnology and Genetic Engineering, Faculty of Biological Sciences, Islamic University, Kushtia, 7003, Bangladesh.
| | - Nusrat Jahan Selsi
- Department of Pharmacy, University of Science & Technology, Chittagong, 4202, Bangladesh.
| | - Marium Sultana
- Department of Pharmacy, BGC Trust University Bangladesh, Chittagong, 4381, Bangladesh.
| | - Md Hossen
- Department of Pharmacy, BGC Trust University Bangladesh, Chittagong, 4381, Bangladesh.
| | - Tanjiba Harun Bipasha
- Department of Pharmacy, University of Science & Technology, Chittagong, 4202, Bangladesh.
| | - Mahbubur Rahman
- Department of Pharmacy, BGC Trust University Bangladesh, Chittagong, 4381, Bangladesh.
| | - Md Nazim Uddin
- Department of Pharmacy, Southern University Bangladesh, Chittagong, 4000, Bangladesh.
| | - S M Zahid Hosen
- Pancreatic Research Group, South Western Sydney Clinical School, University of New South Wales, and Ingham Institute for Applied Medical Research, Liverpool, NSW, 2170, Australia.
| | - Raju Dash
- Department of Anatomy, Dongguk University College of Medicine, Gyeongju, 38066, Republic of Korea.
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Yao Y, Zhang C, Han B, Tang Y, Xiong Y, Wang S. [Shikonin induces cell death by inhibiting glycolysis in human testicular cancer I-10 and seminoma TCAM-2 cells]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2020; 40:1288-1294. [PMID: 32990238 DOI: 10.12122/j.issn.1673-4254.2020.09.10] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
OBJECTIVE To investigate the pattern of shikonin-induced cell death in testicular cancer cell I-10 and seminoma TCAM-2 cells and explore the possible mechanism in light of mitochondrial function and glycolysis. METHODS I-10 cells treated with 0, 1.2, 1.4 and 1.6 μmol/L shikonin and TCAM-2 cells treated with 0, 0.5, 1 and 1.5 μmol/L shikonin were examined for mitochondrial membrane potential and production of reactive oxygen species (ROS) using JC-1 kit and ROS kit, respectively. The levels of intracellular lactic acid in the cells were detected using a lactic acid kit. The inhibitory effect of shikonin on the proliferation of the cells was assessed with MTT assay. The death patterns of the cells were observed by transmission electron microscopy, and annexin V-FITC/PI double staining was used to detect cell apoptosis. Western blotting was used to detect the relative expression levels of the apoptotic proteins Bax, Bcl-2, and cleaved caspase-3, the autophagy- related protein LC3B and glycolysis- related proteins PKM2, GLUT1 and HK2. RESULTS MTT assay showed that shikonin significantly inhibited the proliferation of I-10 and TCAM-2 cells in a time- and dose-dependent manner (P < 0.05). The IC50 values of shikonin in I-10 cells at 24, 48, and 72 h were 1.8, 1.36 and 1.16 μmol/L, as compared with 2.37, 0.8 and 0.41 μmol/L in TCAM-2 cells, respectively. Shikonin treatment significantly reduced mitochondrial membrane potential, increased ROS levels and lower the level of lactic acid in both I-10 and TCAM-2 cells (P < 0.05). Transmission electron microscopy and annexin V-FITC/PI double staining demonstrated that shikonin induced apoptosis and excessive autophagy in I-10 and TCAM-2 cells (P < 0.05). In both I-10 and TCAM cells, shikonin treatment significantly down- regulated the expressions of Bax, Bcl-2, cleaved caspase-3, PKM2, GLUT1 and HK2, and up-regulated the expression of autophagy-related protein LC3B (P < 0.05). CONCLUSIONS Shikonin can inhibit the proliferation, induce apoptosis and increase autophagy in both I-10 and TCAM-2 cells probably by affecting energy metabolism of the cells.
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Affiliation(s)
- Yue Yao
- Department of Urology, First Affiliated Hospital of Bengbu Medical College, Bengbu 233000, China
| | - Chong Zhang
- Department of Urology, First Affiliated Hospital of Bengbu Medical College, Bengbu 233000, China
| | - Bing Han
- Department of Urology, First Affiliated Hospital of Bengbu Medical College, Bengbu 233000, China
| | - Yurui Tang
- Department of Urology, First Affiliated Hospital of Bengbu Medical College, Bengbu 233000, China
| | - Yanjun Xiong
- Department of Urology, First Affiliated Hospital of Bengbu Medical College, Bengbu 233000, China
| | - Sheng Wang
- Department of Urology, First Affiliated Hospital of Bengbu Medical College, Bengbu 233000, China
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Han X, Kang KA, Piao MJ, Zhen AX, Hyun YJ, Kim HM, Ryu YS, Hyun JW. Shikonin Exerts Cytotoxic Effects in Human Colon Cancers by Inducing Apoptotic Cell Death via the Endoplasmic Reticulum and Mitochondria-Mediated Pathways. Biomol Ther (Seoul) 2019; 27:41-47. [PMID: 29925224 PMCID: PMC6319547 DOI: 10.4062/biomolther.2018.047] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 04/29/2018] [Accepted: 05/03/2018] [Indexed: 12/14/2022] Open
Abstract
The apoptotic effects of shikonin (5,8-dihydroxy-2-[(1R)-1-hydroxy-4-methylpent-3-enyl]naphthalene-1,4-dione) on the human colon cancer cell line SNU-407 were investigated in this study. Shikonin showed dose-dependent cytotoxic activity against SNU-407 cells, with an estimated IC50 value of 3 µM after 48 h of treatment. Shikonin induced apoptosis, as evidenced by apoptotic body formation, sub-G1 phase cells, and DNA fragmentation. Shikonin induced apoptotic cell death by activating mitogen-activated protein kinase family members, and the apoptotic process was mediated by the activation of endoplasmic reticulum (ER) stress, leading to activation of the PERK/elF2α/CHOP apoptotic pathway, and mitochondrial Ca2+ accumulation. Shikonin increased mitochondrial membrane depolarization and altered the levels of apoptosis-related proteins, with a decrease in B cell lymphoma (Bcl)-2 and an increase in Bcl-2-associated X protein, and subsequently, increased expression of cleaved forms of caspase-9 and -3. Taken together, we suggest that these mechanisms, including MAPK signaling and the ER-and mitochondria-mediated pathways, may underlie shikonin-induced apoptosis related to its anticancer effect.
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Affiliation(s)
- Xia Han
- Jeju National University School of Medicine, Jeju 63243, Republic of Korea
| | - Kyoung Ah Kang
- Jeju National University School of Medicine, Jeju 63243, Republic of Korea
| | - Mei Jing Piao
- Jeju National University School of Medicine, Jeju 63243, Republic of Korea
| | - Ao Xuan Zhen
- Jeju National University School of Medicine, Jeju 63243, Republic of Korea
| | - Yu Jae Hyun
- Jeju National University School of Medicine, Jeju 63243, Republic of Korea
| | - Hyun Min Kim
- Jeju National University School of Medicine, Jeju 63243, Republic of Korea
| | - Yea Seong Ryu
- Jeju National University School of Medicine, Jeju 63243, Republic of Korea
| | - Jin Won Hyun
- Jeju National University School of Medicine, Jeju 63243, Republic of Korea
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Deng X, Chen Q, Qiang L, Chi M, Xie N, Wu Y, Yao M, Zhao D, Ma J, Zhang N, Xie Y. Development of a Porcine Full-Thickness Burn Hypertrophic Scar Model and Investigation of the Effects of Shikonin on Hypertrophic Scar Remediation. Front Pharmacol 2018; 9:590. [PMID: 29922164 PMCID: PMC5996232 DOI: 10.3389/fphar.2018.00590] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Accepted: 05/17/2018] [Indexed: 01/10/2023] Open
Abstract
Hypertrophic scars formed after burns remain a challenge in clinical practice. Development of effective scar therapies relies on validated animal models that mimic human hypertrophic scars. A consistent porcine full-thickness burn hypertrophic scar model has yet to be developed. We have previously reported that Shikonin induces apoptosis and reduces collagen production in hypertrophic scar fibroblasts in vitro and may therefore hold potential as a novel scar remediation therapy. In this study, we aimed to validate the potential of Shikonin on scar remediation in vivo. A novel porcine hypertrophic scar model was created after full-thickness burn wounds, and the effect of Shikonin on scar remediation was investigated. Clinical scar assessments, histology, and immunohistochemistry were used to evaluate scar appearance, morphology, and protein expression. Eight weeks after scar formation, clinical scar assessment indicated that the score of hypertrophic scars treated with Shikonin was significantly lower than that of the control group. Hypertrophic scars treated with Shikonin appeared flat, pink, and pliable. In addition, histological analysis indicated that hypertrophic scars treated with Shikonin exhibited reduced thickness of the epidermis and dermis, thin and even epithelial layers, reduced numbers of keratinocytes, uniform distribution of fibroblasts, and a parallel and loose arrangement of collagen fibers in the dermis. Moreover, immunohistochemical analysis indicated that Shikonin inhibited the expression of p63, cytokeratin 10, alpha-smooth muscle actin, transforming growth factor-beta 1, and collagen I, which play important roles in hypertrophic scar formation. Based on these results, we conclude that Shikonin has potential as a novel scar therapy.
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Affiliation(s)
- Xingwang Deng
- College of Clinical Medicine, Ningxia Medical University, Yinchuan, China
| | - Qian Chen
- Department of Burns and Plastic Surgery, Xinyang Central Hospital, Xinyang, China
| | - Lijuan Qiang
- College of Clinical Medicine, Ningxia Medical University, Yinchuan, China
| | - Mingwei Chi
- Medical Department, General Hospital of Ningxia Medical University, Yinchuan, China
| | - Nan Xie
- Tissue Organ Bank & Tissue Engineering Centre, General Hospital of Ningxia Medical University, Yinchuan, China
| | - Yinsheng Wu
- Department of Burns and Plastic Surgery, General Hospital of Ningxia Medical University, Yinchuan, China
| | - Ming Yao
- Department of Burns and Plastic Surgery, General Hospital of Ningxia Medical University, Yinchuan, China
| | - Dan Zhao
- Tissue Organ Bank & Tissue Engineering Centre, General Hospital of Ningxia Medical University, Yinchuan, China
| | - Jiaxiang Ma
- Tissue Organ Bank & Tissue Engineering Centre, General Hospital of Ningxia Medical University, Yinchuan, China
| | - Ning Zhang
- Department of Pathology, General Hospital of Ningxia Medical University, Yinchuan, China
| | - Yan Xie
- Tissue Organ Bank & Tissue Engineering Centre, General Hospital of Ningxia Medical University, Yinchuan, China.,Clinical Medical School, Ningxia Medical University, Yinchuan, China.,School of Biomedical Sciences, Faculty of Health, Queensland University of Technology, Brisbane, QLD, Australia
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Mehta M, Branford OA, Rolfe KJ. The evidence for natural therapeutics as potential anti-scarring agents in burn-related scarring. BURNS & TRAUMA 2016; 4:15. [PMID: 27574685 PMCID: PMC4964041 DOI: 10.1186/s41038-016-0040-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Accepted: 04/12/2016] [Indexed: 02/07/2023]
Abstract
Though survival rate following severe thermal injuries has improved, the incidence and treatment of scarring have not improved at the same speed. This review discusses the formation of scars and in particular the formation of hypertrophic scars. Further, though there is as yet no gold standard treatment for the prevention or treatment of scarring, a brief overview is included. A number of natural therapeutics have shown beneficial effects both in vivo and in vitro with the potential of becoming clinical therapeutics in the future. These natural therapeutics include both plant-based products such as resveratrol, quercetin and epigallocatechin gallate as examples and includes the non-plant-based therapeutic honey. The review also includes potential mechanism of action for the therapeutics, any recorded adverse events and current administration of the therapeutics used. This review discusses a number of potential 'treatments' that may reduce or even prevent scarring particularly hypertrophic scarring, which is associated with thermal injuries without compromising wound repair.
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Affiliation(s)
- M. Mehta
- British College of Osteopathic Medicine (BCOM), Finchley Road, London, NW3 5HR UK
| | - O. A. Branford
- The Royal Marsden Hospital, Fulham Rd, London, SW3 6JJ UK
| | - K. J. Rolfe
- British College of Osteopathic Medicine (BCOM), Finchley Road, London, NW3 5HR UK
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Tang X, Zhang C, Wei J, Fang Y, Zhao R, Yu J. Apoptosis is induced by shikonin through the mitochondrial signaling pathway. Mol Med Rep 2016; 13:3668-74. [PMID: 26935754 DOI: 10.3892/mmr.2016.4967] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Accepted: 11/16/2015] [Indexed: 11/06/2022] Open
Abstract
The aim of the present study was to investigate the effects of shikonin (SHI) on the induction of apoptosis in human TT medullary thyroid carcinoma cells, and to explore the role of mitochondrial signaling in this process. MTT, Annexin V‑phycoerythrin/7‑aminoactinomycin D staining, electron microscopy and JC‑1 probe staining were performed to analyze mitochondrial membrane potential, and western blot analysis was used to examine the activation of the mitochondrial signaling pathway, and the changes in mitochondrial apoptosis pathway‑associated protein expression. Following culture for 24‑72 h, treatment with various concentrations of SHI inhibited the proliferation of TT cells, in a dose‑ and time‑dependent manner. Transmission electron microscopy demonstrated the presence of typical apoptotic structures, as well as mitochondrial structural changes. The expression levels of apoptosis‑associated proteins caspase‑9, caspase‑3 and poly adenosine triphosphate ribose polymerase increased in a dose‑dependent manner following treatment with SHI. In addition, the mitochondrial membrane potential of the experimental group was significantly decreased, and the mitochondrial apoptosis pathway‑associated proteins were altered. A possible mechanism underlying SHI‑induced apoptosis through the mitochondrial signaling pathway is the regulation of B cell lymphoma 2 (Bcl‑2)/Bcl‑2‑associated protein X expression levels, resulting in the decrease in mitochondrial membrane potential and the activation of the caspase‑9/caspase‑3 enzyme‑associated reactions.
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Affiliation(s)
- Xuxia Tang
- Department of Otolaryngology, The First Affiliated Hospital of Zhejiang Traditional Chinese Medical University, Hangzhou, Zhejiang 310000, P.R. China
| | - Chen Zhang
- Department of Otolaryngology, The First Affiliated Hospital of Zhejiang Traditional Chinese Medical University, Hangzhou, Zhejiang 310000, P.R. China
| | - Jiongzhou Wei
- Department of Otolaryngology, The First Affiliated Hospital of Zhejiang Traditional Chinese Medical University, Hangzhou, Zhejiang 310000, P.R. China
| | - Yuting Fang
- Department of Otolaryngology, The First Affiliated Hospital of Zhejiang Traditional Chinese Medical University, Hangzhou, Zhejiang 310000, P.R. China
| | - Rongxiang Zhao
- Department of Otolaryngology, The First Affiliated Hospital of Zhejiang Traditional Chinese Medical University, Hangzhou, Zhejiang 310000, P.R. China
| | - Jianxin Yu
- Department of Plastic Surgery, The Second Affiliated Hospital of Zhejiang University Medical College, Hangzhou, Zhejiang 310000, P.R. China
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Lu D, Qian J, Li W, Feng Q, Pan S, Zhang S. β-hydroxyisovaleryl-shikonin induces human cervical cancer cell apoptosis via PI3K/AKT/mTOR signaling. Oncol Lett 2015; 10:3434-3442. [PMID: 26788147 PMCID: PMC4665374 DOI: 10.3892/ol.2015.3769] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2014] [Accepted: 06/22/2015] [Indexed: 12/31/2022] Open
Abstract
The present study aimed to investigate the inhibitory ability of β-hydroxyisovaleryl-shikonin (β-HIVS) on the proliferation of human cervical cancer HeLa cells and to identify the mechanism of this effect. The HeLa cells were treated with β-HIVS and the inhibition of cell growth was detected by an MTT assay. Flow cytometry was performed to analyze the apoptosis rate and cell cycle distribution of HeLa cells. Reverse transcription-polymerase chain reaction and western blot analysis were used to examine the expression of the phosphatidylinositol 3-kinase (PI3K)/protein kinase B (AKT)/mammalian target of rapamycin (mTOR) signaling pathway proteins. The results revealed that β-HIVS inhibited HeLa cell proliferation in a dose- and time-dependent manner. With the administration of increasing concentrations of β-HIVS, the apoptotic rate of HeLa cells was also increased. The cell cycle was slightly arrested at the S phase, with ~6% of cells in this phase, subsequent to treatment with 10 µM β-HIVS. In addition, β-HIVS markedly reduced the expression levels of PI3K, AKT, mTOR and 70-kDa ribosomal protein S6 kinase in HeLa cells. β-HIVS promoted cervical cancer cell apoptosis by inhibiting the PI3K/AKT/mTOR signaling pathway and suppressing downstream gene expression. The present study is expected to lead to the development of molecular targeted therapy for this signaling pathway as a novel method of cervical cancer treatment.
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Affiliation(s)
- Dan Lu
- Department of Gynecology & Obstetrics, College of Clinical Medicine, Yangzhou University, Yangzhou, Jiangsu 225001, P.R. China
| | - Jing Qian
- Department of Gynecology & Obstetrics, College of Clinical Medicine, Yangzhou University, Yangzhou, Jiangsu 225001, P.R. China
| | - Wei Li
- Department of Gynecology & Obstetrics, College of Clinical Medicine, Yangzhou University, Yangzhou, Jiangsu 225001, P.R. China
| | - Qianqian Feng
- Department of Gynecology & Obstetrics, College of Clinical Medicine, Yangzhou University, Yangzhou, Jiangsu 225001, P.R. China
| | - Shu Pan
- Department of Gynecology & Obstetrics, College of Clinical Medicine, Yangzhou University, Yangzhou, Jiangsu 225001, P.R. China
| | - Siquan Zhang
- Department of Gynecology & Obstetrics, College of Clinical Medicine, Yangzhou University, Yangzhou, Jiangsu 225001, P.R. China
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Masuda Y, Asada K, Satoh R, Takada K, Kitajima J. Capillin, a major constituent of Artemisia capillaris Thunb. flower essential oil, induces apoptosis through the mitochondrial pathway in human leukemia HL-60 cells. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2015; 22:545-552. [PMID: 25981920 DOI: 10.1016/j.phymed.2015.03.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Revised: 03/11/2015] [Accepted: 03/12/2015] [Indexed: 06/04/2023]
Abstract
BACKGROUND Natural products are one of the most important sources of drugs used in pharmaceutical therapeutics. Screening of several natural products in the search for novel anticancer agents against human leukemia HL-60 cells led us to identify potent apoptosis-inducing activity in the essential oil fraction from Artemisia capillaris Thunb. flower. METHODS The cytotoxic effects of extracts were assessed on human leukemia HL-60 cells by XTT assay. Induction of apoptosis was assessed by analysis of DNA fragmentation and nuclear morphological change. The plant name was checked with the plant list website (http://www.theplantlist.org). RESULTS A purified compound from the essential oil fraction from Artemisia capillaris Thunb. flower that potently inhibited cell growth in human leukemia HL-60 cells was identified as capillin. The cytotoxic effect of capillin in cells was associated with apoptosis. When HL-60 cells were treated with 10(-6) M capillin for 6 h, characteristic features of apoptosis such as DNA fragmentation and nuclear fragmentation were observed. Moreover, activation of c-Jun N-terminal kinase (JNK) was detected after treatment with capillin preceding the appearance of characteristic properties of apoptosis. Release of cytochrome c from mitochondria was also observed in HL-60 cells that had been treated with capillin. CONCLUSION Capillin induces apoptosis in HL-60 cells via the mitochondrial apoptotic pathway, which might be controlled through JNK signaling. Our results indicate that capillin may be a potentially useful anticancer drug that could enhance therapeutic efficacy.
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Affiliation(s)
- Yutaka Masuda
- Laboratory of Clinical Pharmacy, Showa Pharmaceutical University, Higashi Tamagawa Gakuen, Machida, Tokyo 194-8543, Japan.
| | - Keisuke Asada
- Laboratory of Clinical Pharmacy, Showa Pharmaceutical University, Higashi Tamagawa Gakuen, Machida, Tokyo 194-8543, Japan
| | - Rei Satoh
- Laboratory of Kampo Medicinal Education, Showa Pharmaceutical University, Higashi Tamagawa Gakuen, Machida, Tokyo 194-8543, Japan
| | - Kimihiko Takada
- Laboratory of Clinical Pharmacy, Showa Pharmaceutical University, Higashi Tamagawa Gakuen, Machida, Tokyo 194-8543, Japan
| | - Junichi Kitajima
- Laboratory of Kampo Medicinal Education, Showa Pharmaceutical University, Higashi Tamagawa Gakuen, Machida, Tokyo 194-8543, Japan
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Baloch SK, Ma L, Xu GH, Bai LF, Zhao H, Tang CY, Pang YJ, Yang RW, Wang XM, Lu GH, Yang YH. A potent anticancer agent of shikonin derivative targeting tubulin. Chirality 2015; 27:274-80. [PMID: 25663187 DOI: 10.1002/chir.22425] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Revised: 12/03/2014] [Accepted: 12/12/2014] [Indexed: 01/08/2023]
Abstract
In this study, a shikonin ester derivative, compound , was selected to evaluate its anticancer activities and we found that compound exhibited better antitubulin activities against the human HepG2 cell line with an IC50 value of 1.097 μM. Furthermore, the inhibition of tubulin polymerization results indicated that compound demonstrated the most potent antitubulin activity (IC50 = 13.88), which was compared with shikonin and colchicine as positive controls (IC50 = 25.28 μM and 22.56 μM), respectively. Compound was simulated to have good binding site with tubulin and arrested the cell cycle at G2/M phase, which also induces apoptosis in HepG2 cells, in which P53 and members of Bcl-2 protein family were both involved in the progress of apoptosis revealed by western blot. Confocal microscopy observations revealed compound targeted tubulin and altered its polymerization by interfering with microtubule organization. Based on these results, compound functions as a potent anticancer agent targeting tubulin.
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Affiliation(s)
- Shahla Karim Baloch
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, P.R. China; Department of Biotechnology, FCPD, Sindh Agriculture University, Tandojam, Pakistan
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15
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Xie Y, Fan C, Dong Y, Lynam E, Leavesley DI, Li K, Su Y, Yang Y, Upton Z. Functional and mechanistic investigation of Shikonin in scarring. Chem Biol Interact 2015; 228:18-27. [DOI: 10.1016/j.cbi.2014.12.037] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Revised: 12/10/2014] [Accepted: 12/31/2014] [Indexed: 12/11/2022]
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16
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Guo J, Chen XF, Liu J, Lin HY, Han HW, Liu HC, Huang SC, Shahla BK, Kulek A, Qi JL, Wang XM, Ling LJ, Yang YH. Novel Shikonin Derivatives Targeting Tubulin as Anticancer Agents. Chem Biol Drug Des 2014; 84:603-15. [DOI: 10.1111/cbdd.12353] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2013] [Revised: 03/20/2014] [Accepted: 04/22/2014] [Indexed: 12/15/2022]
Affiliation(s)
- Jing Guo
- State Key Laboratory of Pharmaceutical Biotechnology; School of Life Sciences; Nanjing University; Nanjing 210093 China
| | - Xiao-Feng Chen
- Department of oncology; the First Affiliated Hospital of Nanjing Medical University; Nanjing 210029 China
| | - Jing Liu
- State Key Laboratory of Pharmaceutical Biotechnology; School of Life Sciences; Nanjing University; Nanjing 210093 China
| | - Hong-Yan Lin
- State Key Laboratory of Pharmaceutical Biotechnology; School of Life Sciences; Nanjing University; Nanjing 210093 China
| | - Hong-Wei Han
- State Key Laboratory of Pharmaceutical Biotechnology; School of Life Sciences; Nanjing University; Nanjing 210093 China
| | - Hong-Chang Liu
- State Key Laboratory of Pharmaceutical Biotechnology; School of Life Sciences; Nanjing University; Nanjing 210093 China
| | - Shou-Cheng Huang
- State Key Laboratory of Pharmaceutical Biotechnology; School of Life Sciences; Nanjing University; Nanjing 210093 China
| | - Baloch K. Shahla
- State Key Laboratory of Pharmaceutical Biotechnology; School of Life Sciences; Nanjing University; Nanjing 210093 China
| | - Andrew Kulek
- Department of Emergency Medicine; Wayne State University School of Medicine; Detroit MI 48201 USA
| | - Jin-Liang Qi
- State Key Laboratory of Pharmaceutical Biotechnology; School of Life Sciences; Nanjing University; Nanjing 210093 China
| | - Xiao-Ming Wang
- State Key Laboratory of Pharmaceutical Biotechnology; School of Life Sciences; Nanjing University; Nanjing 210093 China
| | - Li-Jun Ling
- Department of Breast Surgery; the First Affiliated Hospital of Nanjing Medical University; Nanjing 210029 China
| | - Yong-Hua Yang
- State Key Laboratory of Pharmaceutical Biotechnology; School of Life Sciences; Nanjing University; Nanjing 210093 China
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Lithospermi radixExtract Inhibits Histamine Release and Production of Inflammatory Cytokine in Mast Cells. Biosci Biotechnol Biochem 2014; 71:2886-92. [DOI: 10.1271/bbb.70208] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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18
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Wang Y, Zhou Y, Jia G, Han B, Liu J, Teng Y, Lv J, Song Z, Li Y, Ji L, Pan S, Jiang H, Sun B. Shikonin suppresses tumor growth and synergizes with gemcitabine in a pancreatic cancer xenograft model: Involvement of NF-κB signaling pathway. Biochem Pharmacol 2014; 88:322-33. [PMID: 24522113 DOI: 10.1016/j.bcp.2014.01.041] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2013] [Revised: 01/28/2014] [Accepted: 01/30/2014] [Indexed: 10/25/2022]
Abstract
Although gemcitabine is currently the best chemotherapeutic agent available for the treatment of advanced pancreatic cancer, eventual failure of response is a significant clinical problem. Therefore, novel therapeutic approaches against this disease are highly needed. The aim of this study was to evaluate whether shikonin, a naphthoquinone derivative, has potential in the treatment of pancreatic cancer when used either alone or in combination with gemcitabine. Our in vitro results showed that shikonin inhibited the proliferation of three different human pancreatic cancer cell lines and potentiated the cytotoxic effect of gemcitabine, which correlated with the down-regulation of constitutive as well as gemcitabine-induced activation of NF-κB and NF-κB-regulated gene products. Most importantly, using a xenograft model of human pancreatic cancer, we found shikonin alone significantly suppressed tumor growth and argumented the antitumor activity of gemcitabine. These effects also correlated with the down-regulation of NF-κB activity and its target genes, decreased proliferation (PCNA and Ki-67), decreased microvessel density (CD31), and increased apoptosis (TUNEL) in tumor remnants. Collectively, our results suggest that shikonin can suppress the growth of human pancreatic tumors and potentiate the antitumor effects of gemcitabine through the suppression of NF-κB and NF-κB-regulated gene products.
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Affiliation(s)
- Yongwei Wang
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
| | - Yinan Zhou
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
| | - Guang Jia
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
| | - Bing Han
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
| | - Ji Liu
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
| | - Yueqiu Teng
- Department of Central Laboratory of Blood Cancer, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
| | - Jiachen Lv
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
| | - Zengfu Song
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
| | - Yilong Li
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
| | - Liang Ji
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
| | - Shangha Pan
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
| | - Hongchi Jiang
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
| | - Bei Sun
- Department of Pancreatic and Biliary Surgery, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, China.
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Kong WY, Chen XF, Shi J, Baloch SK, Qi JL, Zhu HL, Wang XM, Yang YH. Design and Synthesis of Fluoroacylshikonin as an Anticancer Agent. Chirality 2013; 25:757-62. [DOI: 10.1002/chir.22209] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Accepted: 05/29/2013] [Indexed: 11/08/2022]
Affiliation(s)
- Wen-Yao Kong
- State Key Laboratory of Pharmaceutical Biotechnology; Nanjing University; Nanjing People's Republic of China
| | - Xiao-Feng Chen
- Department of oncology; the First Affiliated Hospital of Nanjing Medical University; Nanjing People's Republic of China
| | - Jing Shi
- State Key Laboratory of Pharmaceutical Biotechnology; Nanjing University; Nanjing People's Republic of China
| | - Shahla Karim Baloch
- State Key Laboratory of Pharmaceutical Biotechnology; Nanjing University; Nanjing People's Republic of China
| | - Jin-Liang Qi
- State Key Laboratory of Pharmaceutical Biotechnology; Nanjing University; Nanjing People's Republic of China
| | - Hai-Liang Zhu
- State Key Laboratory of Pharmaceutical Biotechnology; Nanjing University; Nanjing People's Republic of China
| | - Xiao-Ming Wang
- State Key Laboratory of Pharmaceutical Biotechnology; Nanjing University; Nanjing People's Republic of China
| | - Yong-Hua Yang
- State Key Laboratory of Pharmaceutical Biotechnology; Nanjing University; Nanjing People's Republic of China
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20
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Piao JL, Cui ZG, Furusawa Y, Ahmed K, Rehman MU, Tabuchi Y, Kadowaki M, Kondo T. The molecular mechanisms and gene expression profiling for shikonin-induced apoptotic and necroptotic cell death in U937 cells. Chem Biol Interact 2013; 205:119-27. [PMID: 23811387 DOI: 10.1016/j.cbi.2013.06.011] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Revised: 06/12/2013] [Accepted: 06/17/2013] [Indexed: 01/01/2023]
Abstract
Shikonin (SHK), a natural naphthoquinone derived from the Chinese medical herb Lithospermum erythrorhizon, induces both apoptosis and necroptosis in several cancer cell lines. However, the detailed molecular mechanisms involved in the initiation of cell death are still unclear. In the present study, caspase-dependent apoptosis was induced by SHK treatment at 1μM after 6h in U937 cells, with increase in DNA fragmentation, generation of intracellular reactive oxygen species (ROS), fraction of cells with low mitochondrial membrane potential (MMP), and in the expression of BH3 only proteins Noxa and tBid. Interestingly, caspase-independent cell death was also detected with SHK treatment at 10μM, observed as increase in SYTOX® Green staining and release of lactate dehydrogenase (LDH). Necrostatin-1 (Nec-1) completely inhibited the SHK-induced leakage of LDH and SYTOX® Green staining. Cell permeable exogenous glutathione (GSH) completely inhibited 1μM SHK-induced apoptosis and converted 10μM SHK-induced necroptosis to apoptosis. Gene expression profiling revealed that 353 genes were found to be significantly regulated by 1μM and 85 genes by 10μM of SHK treatment, respectively. Among these genes, the transcription factor 3 (ATF3) and DNA-damage-inducible transcript 3 (DDIT3) were highly expressed at 1μM of SHK treatment, while tumor necrosis factor (TNF) expression mainly increased at 10μM treatment. These findings provide novel information for the molecular mechanism of SHK-induced apoptosis and necroptosis.
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Affiliation(s)
- Jin-Lan Piao
- Department of Radiological Sciences, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
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21
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Rajasekar S, Park DJ, Park C, Park S, Park YH, Kim ST, Choi YH, Choi YW. In vitro and in vivo anticancer effects of Lithospermum erythrorhizon extract on B16F10 murine melanoma. JOURNAL OF ETHNOPHARMACOLOGY 2012; 144:335-45. [PMID: 22995444 DOI: 10.1016/j.jep.2012.09.017] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2012] [Revised: 08/18/2012] [Accepted: 09/10/2012] [Indexed: 05/16/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Lithospermum erythrorhizon has long been used in traditional Asian medicine for the treatment of diseases including skin cancer. In this study, hexane extract from the roots of Lithospermum erythrorhizon (LEH) was chemically characterized and its anticancer activity was tested against the most aggressive form of skin cancer. MATERIALS AND METHODS The in vitro anticancer studies viz. cell growth, cell cycle and apoptosis, and the expression of tumor regulating proteins were analyzed against B16F10 melanoma cells. In addition, C57BL/6 mice models were used to evaluate the in vivo anticancer potential of LEH. Mice were intraperitoneally injected with LEH at doses of 0.1 and 10mg/kg every 3 days. The tumor inhibition ratio was determined after 21 days of treatment and the histopathological analyses of the tumor tissues were compared. Further, LEH was purified and its active compounds were structurally elucidated and identified by NMR spectra and quantified by HPLC analyses. RESULTS LEH effectively inhibits the growth of melanoma cells with an IC(50) of 2.73μg/ml. Cell cycle analysis revealed that LEH increased the percentage of cells in sub-G1 phase by dose dependent manner. LEH exhibited down regulation of anti-apoptotic Bcl-2 family proteins and up regulation of apoptotic Bax protein expression. Importantly, LEH induced cleavage of poly (ADP-ribose) polymerase (PARP) and activated the caspase cascade (caspase 3) with this cleavage mediating the apoptosis of B16F10 cells. LEH treatment at a dose of 10mg/kg for 21 days in experimental mice implanted with tumors resulted in significant reduction of the tumor growth (43%) and weight (36%). Histopathology analysis of LEH treated tumor tissues showed evidence of increased necrotic cells in a concentration dependent manner. Meanwhile, five naphthoquinone compounds [Shikonin (1); Deoxyshikonin (2); β-Hydroxyisovalerylshikonin (3); Acetylshikonin (4) and Isobutyrylshikonin (5)] were purified from LEH and responsible for its anticancer activity. CONCLUSION LEH induced apoptosis in B16F10 cells by activation of caspase 3 and inducing sub-G1 cell cycle arrest. LEH exhibited both in vitro and in vivo anticancer activity. Shikonin derivatives in the LEH are responsible for the anticancer activity.
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Affiliation(s)
- Seetharaman Rajasekar
- Department of Horticultural Bioscience, Pusan National University, Miryang, Republic of Korea
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Rao Z, Liu X, Zhou W, Yi J, Li SS. Synthesis and antitumour activity of β-hydroxyisovalerylshikonin analogues. Eur J Med Chem 2011; 46:3934-41. [DOI: 10.1016/j.ejmech.2011.05.065] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2010] [Revised: 05/25/2011] [Accepted: 05/26/2011] [Indexed: 10/18/2022]
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Wu YY, Zhu L, Ma XY, Shao ZJ, Chen J, Chen XJ, Wan LH, Zhou LM. The anti-proliferation effect of Aikete injection on hepatocellular carcinoma in vitro and in vivo. PHARMACEUTICAL BIOLOGY 2011; 49:531-538. [PMID: 21385105 DOI: 10.3109/13880209.2010.524652] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
CONTEXT Aikete injection is composed of acetylshikonin and β,β-dimethylacrylshikonin, which have been reported to have anti-tumor effects on a wide range of cancer cell lines. However, little is known about the effects of the combination of the two components on cancer cells. OBJECTIVE To investigate the anti-proliferation activity of Aikete injection on human hepatocellular carcinoma (HCC) cells and its mechanism. MATERIALS AND METHODS 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyl-tetrazolium bromide assay and growth curve assay were used to determine the inhibitory effect of Aikete injection on the proliferation of SMMC-7721 cells. Giemsa staining, Hoechst 33258 staining and flow cytometry were used to assess cell apoptosis. Expression of Bcl-2 and Bax was analyzed by reverse transcription-polymerase chain reaction and flow cytometry. H22 bearing mice were also used to determine the anti-tumor effect of Aikete injection in vivo. RESULTS Aikete injection inhibited the proliferation of SMMC-7721 cells in both a dose- and time-dependent manner in vitro. The characteristics of apoptosis were observed in Aikete injection groups by Hoechst 33258 and Giemsa staining. In addition, Aikete injection induced cell cycle arrest at G2/M phase and downregulated the Bcl-2 expression and the ratio of Bcl-2/Bax in SMMC-7721 cells. The experiment in vivo showed that Aikete injection significantly inhibited the growth of H22 carcinoma, with an inhibitory rate of 34.37-57.99%. DISCUSSION AND CONCLUSION The results demonstrated that Aikete injection suppressed the growth of HCC cells in vitro and in vivo by inducing cell apoptosis.
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Affiliation(s)
- Yi-ying Wu
- Department of Pharmacology, West China Center of Medical Sciences, Sichuan University, Chengdu, Sichuan, China
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Ito Y, Onobori K, Yamazaki T, Kawamura Y. Tigloylshikonin, a New Minor Shikonin Derivative, from the Roots and the Commercial Root Extract of Lithospermum erythrorhizon. Chem Pharm Bull (Tokyo) 2011; 59:117-9. [DOI: 10.1248/cpb.59.117] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Yusai Ito
- Division of Food Additives, National Institute of Health Sciences
| | - Kenichi Onobori
- Division of Food Additives, National Institute of Health Sciences
| | - Takeshi Yamazaki
- Division of Food Additives, National Institute of Health Sciences
| | - Yoko Kawamura
- Division of Food Additives, National Institute of Health Sciences
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Assimopoulou AN, Papageorgiou VP, Kiparissides C. Synthesis and release studies of shikonin-containing microcapsules prepared by the solvent evaporation method. J Microencapsul 2010. [DOI: 10.3109/02652040309178348] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- A. N. Assimopoulou
- Department of Chemical Engineering, Aristotle University of Thessaloniki, 541 24, Thessaloniki, Greece
| | - V. P. Papageorgiou
- Department of Chemical Engineering, Aristotle University of Thessaloniki, 541 24, Thessaloniki, Greece
| | - C. Kiparissides
- Department of Chemical Engineering, Aristotle University of Thessaloniki, 541 24, Thessaloniki, Greece
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Komi Y, Suzuki Y, Shimamura M, Kajimoto S, Nakajo S, Masuda M, Shibuya M, Itabe H, Shimokado K, Oettgen P, Nakaya K, Kojima S. Mechanism of inhibition of tumor angiogenesis by beta-hydroxyisovalerylshikonin. Cancer Sci 2009; 100:269-77. [PMID: 19200258 PMCID: PMC11159876 DOI: 10.1111/j.1349-7006.2008.01049.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2008] [Revised: 10/20/2008] [Accepted: 10/31/2008] [Indexed: 01/23/2023] Open
Abstract
Shikonin and beta-hydroxyisovalerylshikonin (beta-HIVS) from Lithospermum erythrorhizon inhibit angiogenesis via inhibition of vascular endothelial growth factor receptors (VEGFR) in an adenosine triphosphate-non-competitive manner, although the underlying molecular mechanism has not been fully understood. In the present study, we found that beta-HIVS inhibited angiogenesis within chicken chorioallantoic membrane approximately threefold more efficiently than shikonin. beta-HIVS also significantly inhibited angiogenesis in two other assays, induced either by Lewis lung carcinoma cells implanted in mouse dorsal skin or by VEGF in s.c. implanted Matrigel plugs and metastasis of Lewis lung carcinoma cells to lung. Therefore, using beta-HIVS as a bioprobe, we investigated the molecular mechanism of shikonin's anti-angiogenic actions. beta-HIVS inhibited the phosphorylation and expression of VEGFR2 and Tie2 without affecting VEGFR1 and fibroblast growth factor receptor 1 levels. beta-HIVS suppressed the phosphorylation but not the expression of extracellular signal-regulated kinase, and an Sp1-dependent transactivation of the VEGFR2 and Tie2 promoters, thereby suppressing the proliferation of vascular endothelial and progenitor cells. This was mimicked by an Sp1 inhibitor mithramycin A and partially rescued by Sp1 overexpression. These results implicate potential use of shikonin and beta-HIVS as leading compounds for clinical application in the future by virtue of their unique properties including: (i) inhibition of VEGFR2 and Tie2 phosphorylation in an adenosine triphosphate-non-competitive manner; (ii) simultaneous inhibition of the phosphorylation and expression of VEGFR2 and Tie2; and (iii) bifunctional inhibition of the growth in endothelial cells and vascular remodeling.
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Affiliation(s)
- Yusuke Komi
- Molecular Ligand Biology Research Team, Chemical Genomics Research Group, Chemical Biology Department, RIKEN Advanced Science Institute, 2-1 Hiroshima, Wako, Saitama, Japan
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27
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Liu J, Zhou W, Li SS, Sun Z, Lin B, Lang YY, He JY, Cao X, Yan T, Wang L, Lu J, Han YH, Cao Y, Zhang XK, Zeng JZ. Modulation of orphan nuclear receptor Nur77-mediated apoptotic pathway by acetylshikonin and analogues. Cancer Res 2008; 68:8871-80. [PMID: 18974131 DOI: 10.1158/0008-5472.can-08-1972] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Shikonin derivatives, which are the active components of the medicinal plant Lithospermum erythrorhizon, exhibit many biological effects including apoptosis induction through undefined mechanisms. We recently discovered that orphan nuclear receptor Nur77 migrates from the nucleus to the mitochondria, where it binds to Bcl-2 to induce apoptosis. Here, we report that certain shikonin derivatives could modulate the Nur77/Bcl-2 apoptotic pathway by increasing levels of Nur77 protein and promoting its mitochondrial targeting in cancer cells. Structural modification of acetylshikonin resulted in the identification of a derivative 5,8-diacetoxyl-6-(1'-acetoxyl-4'-methyl-3'-pentenyl)-1,4-naphthaquinones (SK07) that exhibited improved efficacy and specificity in activating the pathway. Unlike other Nur77 modulators, shikonins increased the levels of Nur77 protein through their posttranscriptional regulation. The apoptotic effect of SK07 was impaired in Nur77 knockout cells and suppressed by cotreatment with leptomycin B that inhibited Nur77 cytoplasmic localization. Furthermore, SK07 induced apoptosis in cells expressing the COOH-terminal half of Nur77 protein but not its NH(2)-terminal region. Our data also showed that SK07-induced apoptosis was associated with a Bcl-2 conformational change and Bax activation. Together, our results show that certain shikonin derivatives act as modulators of the Nur77-mediated apoptotic pathway and identify a new shikonin-based lead that targets Nur77 for apoptosis induction.
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Affiliation(s)
- Jie Liu
- Institute for Biomedical Research, Xiamen University, Xiamen, China
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28
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Assimopoulou AN, Papageorgiou VP. Preparation and release studies of alkannin-containing microcapsules. J Microencapsul 2008; 21:161-73. [PMID: 15198428 DOI: 10.1080/02652040310001637839] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Microcapsules containing the pharmaceutical substance alkannin were prepared by the solvent evaporation method to enhance alkannin stability (reduce photo-oxidation, polymerization), to decrease its hydrophobicity and to control its release rate. The effect of various parameters, such as the type of polymeric matrix, the type of surfactant used for microcapsules preparation and the addition of Pistacia lentiscus resin in the core, on the characteristics of the produced microcapsules and the release rate of alkannin were investigated experimentally. Among the polymers tested for matrix, ethylcellulose of viscosity 46cp was the most successful, while ethylcellulose 10cp gave microcapsules with good morphological characteristics but high release rate. Beeswax resulted in flocculation and P. lentiscus resin with or without colophony as the matrix resulted in compact particles with no pores and much slower release, but did not allow alkannin to release easily from the matrix. Sodium dodecyl sulfate resulted in microcapsules with desirable morphological and physicochemical characteristics, while acacia and tragacanth gums were not indicated as surfactants in alkannin microencapsulation since they gave a high release rate and a great extent of particle size, respectively. The incorporation of Pistacia lentiscus resin in the capsule core increased loading and microencapsulation efficiency. Ethylcellulose of 46cp viscosity with sodium dodecyl sulfate as surfactant had the best characteristics studied for alkannin microencapsulation. Finally, the dissolution rate of alkannin from microcapsules was studied in a simulated intestinal and gastric environment and an external environment. Alkannin-containing microcapsules with improved properties can be used internally and externally as a new drug-delivery system.
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Affiliation(s)
- A N Assimopoulou
- Department of Chemical Engineering, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece
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29
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Induction of apoptosis by shikonin through a ROS/JNK-mediated process in Bcr/Abl-positive chronic myelogenous leukemia (CML) cells. Cell Res 2008; 18:879-88. [DOI: 10.1038/cr.2008.86] [Citation(s) in RCA: 167] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
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30
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Cho HR, Cho Y, Kim J, Seo DB, Kim SH, Lee SJ, Kim NI. The Effect of Gromwell (Lithospermum erythrorhizon) Extract on the Stratum Corneum Hydration and Ceramides Content in Atopic Dermatitis Patients. Ann Dermatol 2008; 20:56-66. [PMID: 27303161 PMCID: PMC4904053 DOI: 10.5021/ad.2008.20.2.56] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2007] [Accepted: 03/27/2008] [Indexed: 11/08/2022] Open
Abstract
BACKGROUND A disruption of the balance between the water content of the stratum corneum (SC) and skin surface lipids may lead to the clinical manifestation of dryness of skin in patients with atopic dermatitis (AD). OBJECTIVE To determine whether supplementation of gromwell (Lithospermum erythrorhizon), one of herbs used in East Asia in remedies for various abnormal skin conditions, may improve the SC level of hydration and ceramides, major lipid in SC in patients with AD. METHODS A total of 28 subjects with AD were randomly assigned into two groups: either gromwell group received dextrose contained capsules with 1.5 g of gromwell extracts or placebo group received only dextrose contained capsules for 10 weeks. RESULTS In contrast to no alteration of SC hydration and ceramides in placebo group, the SC hydration in gromwell group was significantly increased in parallel with an increase of SC ceramides. Furthermore, % increase of SC hydration in gromwell group bore a positive correlation with the clinical severity, which suggests that the increase of SC hydration in gromwell group was more effective as AD was more severe. CONCLUSION Supplementation of gromwell improves SC hydration in parallel with an increase of ceramides in part.
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Affiliation(s)
- Hee Ryung Cho
- Department of Dermatology, College of Medicine, Kyung Hee University, Seoul, Korea
| | - Yunhi Cho
- Department of Medical Nutrition, Graduate School of East-West Medical Science, Kyung Hee University, Seoul, Korea
| | - Juyoung Kim
- Department of Medical Nutrition, Graduate School of East-West Medical Science, Kyung Hee University, Seoul, Korea
| | - Dae Bang Seo
- Amorepacific Corporation R & D Center, Yongin, Korea
| | | | - Sang Jun Lee
- Amorepacific Corporation R & D Center, Yongin, Korea
| | - Nack In Kim
- Department of Dermatology, College of Medicine, Kyung Hee University, Seoul, Korea
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31
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Takai N, Ueda T, Nishida M, Nasu K, Narahara H. RETRACTED: β-Hydroxyisovalerylshikonin has a profound anti-growth activity in human endometrial and ovarian cancer cells. Gynecol Oncol 2008; 109:107-14. [DOI: 10.1016/j.ygyno.2007.12.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2007] [Revised: 12/12/2007] [Accepted: 12/20/2007] [Indexed: 10/22/2022]
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32
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Kajimoto S, Horie M, Manabe H, Masuda Y, Shibayama-Imazu T, Nakajo S, Gong XF, Obama T, Itabe H, Nakaya K. A tyrosine kinase inhibitor, beta-hydroxyisovalerylshikonin, induced apoptosis in human lung cancer DMS114 cells through reduction of dUTP nucleotidohydrolase activity. Biochim Biophys Acta Mol Basis Dis 2007; 1782:41-50. [PMID: 18078828 DOI: 10.1016/j.bbadis.2007.11.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2007] [Revised: 11/07/2007] [Accepted: 11/07/2007] [Indexed: 10/22/2022]
Abstract
Apoptotic cell death was induced in human lung cancer DMS114 cells by treatment with beta-hydroxyisovalerylshikonin (beta-HIVS), an ATP-noncompetitive inhibitor of protein tyrosine kinases. Changes in phosphoprotein profiles were analyzed by two-dimensional-polyacrylamide gel electrophoresis (2D-PAGE) after the cells were treated with beta-HIVS. One spot on the 2D gel showed a marked decrease in intensity and the corresponding protein was identified by mass spectrometry as dUTP nucleotidohydrolase (dUTPase). The beta-HIVS-induced decrease of dUTPase in the phosphoprotein fraction of DMS114 cells was confirmed using immunoblotting. Treatment of the cells with beta-HIVS-induced rapid reduction of dUTPase activity. An antioxidant N-acetyl-cysteine inhibited both the reduction of phosphorylated dUTPase and the induction of apoptosis by beta-HIVS treatment of DMS114 cells. Introduction of siRNA directed against dUTPase mRNA into DMS114 cells enhanced the susceptibility of beta-HIVS-induced apoptosis. Treatment of DMS114 cells with beta-HIVS and 5-fluorouracil, a specific inhibitor of thymidylate synthase used as a chemotherapeutic drug, revealed the synergistic effects of these drugs on the inhibition of cell growth. These results suggest that dUTPase activity is one of the crucial factors involved in apoptotic cell death in lung cancer cells.
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Affiliation(s)
- Sachiko Kajimoto
- The Laboratory of Biological Chemistry, School of Pharmaceutical Sciences, Showa University, Tokyo, Japan
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33
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Cui XR, Tsukada M, Suzuki N, Shimamura T, Gao L, Koyanagi J, Komada F, Saito S. Comparison of the cytotoxic activities of naturally occurring hydroxyanthraquinones and hydroxynaphthoquinones. Eur J Med Chem 2007; 43:1206-15. [PMID: 17949858 DOI: 10.1016/j.ejmech.2007.08.009] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2007] [Revised: 07/24/2007] [Accepted: 08/09/2007] [Indexed: 10/22/2022]
Abstract
Seven hydroxyanthraquinone derivatives, 1-7, were isolated from the root of Rheum palmatum (Polygonaceae). Two propionated anthraquinone derivatives, 8 and 9, were synthesized. Four hydroxynaphthoquinone derivatives, 13, 14, 16 and 21, were isolated from the root of Lithospermum erythrorhizon Sieb. et Zucc. (Boraginaceae) and also three naphthoquinone derivatives, 19, 22 and 23, were isolated from the root of Macrotomia euchroma (Royle) Pauls. (Boraginaceae). The cytotoxicity of the anthraquinone and naphthoquinone derivatives on P-gp-underexpressing HCT 116 cells and P-gp-overexpressing Hep G2 cells was examined by MTT assay. Among the anthraquinone derivatives, compounds 3-5 which had OH, CH(2)OH and COOH substituent groups on the anthraquinone skeletons, respectively, showed potent growth inhibitory activities against both types of cancer cells (IC(50) values: 5.7+/-0.9 to 13.0+/-0.7 microM in the case of HCT 116 cells and 5.2+/-0.7 to 12.3+/-0.9 microM in the case of Hep G2 cells). All hydroxynaphthoquinone derivatives isolated in this study exhibited extremely potent growth inhibitory activities against both types of cancer cells (IC(50) values: 0.3+/-0.09 to 0.46+/-1.0 microM in the case of HCT 116 cells and 0.22+/-0.03 to 0.59+/-0.06 microM in the case of Hep G2 cells) as well as shikonin 10 (IC(50) values: 0.32+/-0.02 microM in the case of HCT 116 cells and 0.24+/-0.03 microM in the case of Hep G2 cells).
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Affiliation(s)
- Xing-Ri Cui
- Faculty of Pharmaceutical Sciences, Josai University, Keyakidai 1-1, Sakado, Saitama 350-0295, Japan
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34
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Nishida M, Nasu K, Ueda T, Yuge A, Takai N, Narahara H. β-Hydroxyisovalerylshikonin induces apoptosis and G0/G1 cell-cycle arrest of endometriotic stromal cells: a preliminary in vitro study. Hum Reprod 2006; 21:2850-6. [PMID: 16877374 DOI: 10.1093/humrep/del270] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Most of the current medical treatments for endometriosis aim to down-regulate the estrogen activity. However, a high recurrence rate after medical treatments has been the most significant problem. Beta-hydroxyisovalerylshikonin (beta-HIVS) is an ATP non-competitive inhibitor of protein-tyrosine kinases and is considered an apoptosis-inducing agent. The aim of this study is to evaluate the effects of beta-HIVS on the proliferation, cell cycle and apoptosis of endometriotic stromal cells. METHODS We investigated the effects of beta-HIVS on cultured ovarian endometriotic cyst stromal cells (ECSC) by a modified methylthiazoletetrazolium (MTT) assay, a 5-bromo-2'-deoxyuridine (BrdU) incorporation assay and internucleosomal DNA fragmentation assays. The effect of beta-HIVS on the cell cycle of ECSC was determined by flow cytometry. The expression of apoptosis-related molecules was examined in ECSC using western blot analysis. RESULTS Beta-HIVS significantly inhibited the proliferation and DNA synthesis of ECSC and induced apoptosis and G0/G1 phase cell-cycle arrest of these cells. Down-regulation of the B-cell lymphoma/leukaemia-2 (Bcl-2) expression with the activation of caspase-3, caspase-8 and caspase-9 was observed in ECSC after beta-HIVS treatment. CONCLUSIONS These results suggest that beta-HIVS induces apoptosis of ECSC by suppressing anti-apoptotic proteins. Although our present findings are preliminary, beta-HIVS could potentially be a therapeutic agent for the treatment of endometriosis.
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Affiliation(s)
- M Nishida
- Department of Obstetrics and Gynecology, Faculty of Medicine, Oita University, Oita, Japan
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35
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Wu Z, Wu LJ, Li LH, Tashiro SI, Onodera S, Ikejima T. Shikonin regulates HeLa cell death via caspase-3 activation and blockage of DNA synthesis. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2004; 6:155-166. [PMID: 15224412 DOI: 10.1080/1028602032000169622] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Shikonin, isolated from the plant Lithospermum erythrorhizon Sieb. ET Zucc, inhibited tumor cell growth and induced cell death in various tumor cells, with 50% growth inhibition of human cervical cancer cells, HeLa, at 18.9 +/- 1.1 mumol L-1. Treated with 40 mumol L-1 shikonin, HeLa cells underwent marked apoptotic morphological changes such as a round shape, membrane blebbing and apoptotic bodies derived from the fragmented nuclei. Another hallmark of apoptosis, DNA fragmentation, was observed by gel electrophoresis. Shikonin (10 mumol L-1) significantly blocked the transition from G1 to S phase in the HeLa cell cycle. Pan-caspase inhibitor (Z-VAD-FMK), caspase-3 inhibitor (Z-DEVD-FMK) or caspase-8 inhibitor (Z-IETD-FMK) effectively inhibited shikonin-induced cell death, while caspase-1 inhibitor (Ac-YVAD-CMK) and caspase-9 inhibitor (Z-LEHD-FMK) failed to affect cell death. Caspase-3 activity significantly increased within 12 h after shikonin treatment. Reduced expression of inhibitor of caspase-activated deoxyribonuclease (ICAD) after exposure to shikonin for 12 h suggests the resultant activation of caspase-activated deoxyribonuclease (CAD), leading to apoptosis.
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Affiliation(s)
- Zhen Wu
- Department of Pharmaceutical Science, Heilongjiang University, Harbin 150080, China
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36
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Mani H, Sidhu GS, Singh AK, Gaddipati J, Banaudha KK, Raj K, Maheshwari RK. Enhancement of wound healing by shikonin analogue 93/637 in normal and impaired healing. Skin Pharmacol Physiol 2004; 17:49-56. [PMID: 14755128 DOI: 10.1159/000074063] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2002] [Accepted: 06/06/2003] [Indexed: 11/19/2022]
Abstract
Wound healing is a complicated biological process, which involves interactions of multiple cell types, various growth factors, their mediators and the extracellular matrix proteins. In this study, we evaluated the effects of shikonin analogue 93/637 (SA), derived from the plant Arnebia nobilis, on normal and hydrocortisone-induced impaired healing in full thickness cutaneous punch wounds in rats. SA (0.1%) was applied topically daily as an ointment in polyethylene glycol base on wounds. SA treatment significantly accelerated healing of wounds, as measured by wound contraction compared to controls in hydrocortisone-impaired animals. SA treatment promoted formation of granulation tissue including cell migration and neovascularization, collagenization and reepithelialization. The expression of basic fibroblast growth factor (bFGF) was higher as revealed by immunohistochemistry in treated wounds compared to controls. However, the expression of transforming growth factor-beta(1) was not affected by SA treatment. Since bFGF is known to accelerate wound healing, the increased expression of bFGF by SA may be partly responsible for the enhancement of wound healing. These studies suggest that SA could be further studied for clinical use to enhance wound healing.
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Affiliation(s)
- H Mani
- Center for Combat Casualty and Life Sustainment Research, Department of Pathology, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD 20814, USA
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37
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Masuda Y, Shima G, Aiuchi T, Horie M, Hori K, Nakajo S, Kajimoto S, Shibayama-Imazu T, Nakaya K. Involvement of tumor necrosis factor receptor-associated protein 1 (TRAP1) in apoptosis induced by beta-hydroxyisovalerylshikonin. J Biol Chem 2004; 279:42503-15. [PMID: 15292218 DOI: 10.1074/jbc.m404256200] [Citation(s) in RCA: 125] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
beta-Hydroxyisovalerylshikonin (beta-HIVS), a compound isolated from the traditional oriental medicinal herb Lithospermum radix, is an ATP non-competitive inhibitor of protein-tyrosine kinases, such as v-Src and EGFR, and it induces apoptosis in various lines of human tumor cells. However, the way in which beta-HIVS induces apoptosis remains to be clarified. In this study, we performed cDNA array analysis and found that beta-HIVS suppressed the expression of the gene for tumor necrosis factor receptor-associated protein 1 (TRAP1), which is a member of the heat-shock family of proteins. When human leukemia HL60 cells and human lung cancer DMS114 cells were treated with beta-HIVS, the amount of TRAP1 in mitochondria decreased in a time-dependent manner during apoptosis. A similar reduction in the level of TRAP1 was also observed upon exposure of cells to VP16. Treatment of DMS114 cells with TRAP1-specific siRNA sensitized the cells to beta-HIVS-induced apoptosis. Moreover, the reduction in the level of expression of TRAP1 by TRAP1-specific siRNA enhanced the release of cytochrome c from mitochondria when DMS114 cells were treated with either beta-HIVS or VP16. The suppression of the level of TRAP1 by either beta-HIVS or VP16 was blocked by N-acetyl-cysteine, indicating the involvement of reactive oxygen species (ROS) in the regulation of the expression of TRAP1. These results suggest that suppression of the expression of TRAP1 in mitochondria might play an important role in the induction of apoptosis caused via formation of ROS.
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Affiliation(s)
- Yutaka Masuda
- Laboratory of Biological Chemistry, School of Pharmaceutical Sciences, Showa University, Tokyo 142-8555, Japan.
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38
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Nakaya K. [Basic studies for the development of anticancer, antidementia, and taste modifier drugs]. YAKUGAKU ZASSHI 2004; 124:371-96. [PMID: 15235223 DOI: 10.1248/yakushi.124.371] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We developed various types of differentiation- and apoptosis-inducing agents against tumor cells and also studied the function and structure of synucleins and taste modifiers. Differentiation- and apoptosis-inducing agents are classified into DNA-damaging agents, Na(+), K(+)-ATPase inhibitors, agents affecting the redox states of tumor cells, agents affecting signal transduction pathways, isoprenoid compounds, and ATP-noncompetitive tyrosine kinase inhibitors. These include camptothecin, etoposide, cisplatin, transplantin, bufalin, arsenic trioxide, costunolide, C(2)- ceramide, daidzein, geranylgeranylacetone, geranylgeraniol, vitamin K(2), sophoranone, and beta-hydroxyisovalerylshikonin. The mechanisms of action of these differentiation- and apoptosis-inducing agents are described. The structure and function of synucleins are also reviewed for the development of potential antidementia agents. In addition, the structures of three purified taste modifiers are described.
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Affiliation(s)
- Kazuyasu Nakaya
- School of Pharmaceutical Sciences, Showa University, Tokyo, Japan.
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39
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Singh F, Gao D, Lebwohl MG, Wei H. Shikonin modulates cell proliferation by inhibiting epidermal growth factor receptor signaling in human epidermoid carcinoma cells. Cancer Lett 2003; 200:115-21. [PMID: 14568164 DOI: 10.1016/s0304-3835(03)00239-8] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Shikonin isolated from the roots of the Chinese herb Lithospermum erythrorhizon has been associated with anti-inflammatory properties. We evaluated shikonin's chemotherapeutic potential and investigated its possible mechanism of action in a human cutaneous neoplasm in tissue culture. Shikonin preferentially inhibits the growth of human epidermoid carcinoma cells concentration- and time-dependently compared to SV-40 transfected keratinocytes, demonstrating its anti-proliferative effects against this cancer cell line. Additionally, shikonin decreased phosphorylated levels of EGFR, ERK1/2 and protein tyrosine kinases, while increasing phosphorylated JNK1/2 levels. Overall, shikonin treatment was associated with increased intracellular levels of phosphorylated apoptosis-related proteins, and decreased levels of proteins associated with proliferation in human epidermoid carcinoma cells.
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Affiliation(s)
- Fiza Singh
- Department of Dermatology, Mount Sinai School of Medicine, New York, NY 10029, USA
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40
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Masuda Y, Nishida A, Hori K, Hirabayashi T, Kajimoto S, Nakajo S, Kondo T, Asaka M, Nakaya K. Beta-hydroxyisovalerylshikonin induces apoptosis in human leukemia cells by inhibiting the activity of a polo-like kinase 1 (PLK1). Oncogene 2003; 22:1012-23. [PMID: 12592388 DOI: 10.1038/sj.onc.1206200] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2002] [Revised: 10/22/2002] [Accepted: 10/30/2002] [Indexed: 12/13/2022]
Abstract
beta-Hydroxyisovalerylshikonin (beta-HIVS), which was isolated from the plant, Lithospermum radix, induces apoptosis in various lines of human tumor cells. To identify genes involved in beta-HIVS-induced apoptotic process, we performed cDNA array analysis and found that beta-HIVS suppresses the expression of the gene for a polo-like kinase 1 (PLK1) that is involved in control of the cell cycle. When U937 and HL60 cells were treated with 10(-6) M beta-HIVS for 0.5 h, both the amount of PLK1 itself and the kinase activity of this enzyme were decreased. By contrast, Bcr-Abl-positive K562 cells were resistant to the induction of apoptosis by beta-HIVS and this compound did not suppress the kinase activity of PLK1 in these cells. However, simultaneous treatment of K562 cells with both beta-HIVS and STI571, which selectively inhibits the protein tyrosine kinase (PTK) activity of Bcr-Abl, strongly induced apoptosis. Moreover, beta-HIVS increased the inhibitory effect of STI571 on PTK activity. Treatment of K562 cells with antisense oligodeoxynucleotides (ODNs) specific for PLK1 sensitized these cells to the beta-HIVS-induced fragmentation of DNA. These results suggest that suppression of the activity of PLK1 via inhibition of tyrosine kinase activity by beta-HIVS might play a critical role in the induction of apoptosis.
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Affiliation(s)
- Yutaka Masuda
- Laboratory of Biological Chemistry, School of Pharmaceutical Sciences, Showa University, Tokyo 142-8555, Japan
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41
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Xu Y, Nakajo S, Nakaya K. Synergistic inhibitory effects of transplatin and beta-hydroxyisovalerylshikon on carcinoma A431 cells involve epidermal growth factor receptor. Cancer Lett 2002; 188:67-72. [PMID: 12406550 DOI: 10.1016/s0304-3835(02)00457-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Treatment of human epidermoid carcinoma A431 cells with transplatin (trans-DDP) and beta-hydroxyisovalerylshikon (beta-HIVS) together had a strong inhibitory effect on A431 cells. By contrast, trans-DDP and beta-HIVS by themselves, at the same respective concentrations, had practically no effect. The tyrosine kinase activities of v-Src and epidermal growth factor (EGFR) were inhibited by each of the two agents alone and strongly inhibited by combination. The observed synergistic inhibitory effect on the growth of A431 cells might have resulted from the inhibition of EGFR by trans-DDP, as well as by beta-HIVS.
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Affiliation(s)
- Ying Xu
- Laboratory of Biological Chemistry, School of Pharmaceutical Sciences, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, 142-8555, Tokyo, Japan
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42
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Hashimoto S, Xu Y, Masuda Y, Aiuchi T, Nakajo S, Uehara Y, Shibuya M, Yamori T, Nakaya K. Beta-hydroxyisovalerylshikonin is a novel and potent inhibitor of protein tyrosine kinases. Jpn J Cancer Res 2002; 93:944-51. [PMID: 12716473 PMCID: PMC5927115 DOI: 10.1111/j.1349-7006.2002.tb01341.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Beta-hydroxyisovalerylshikonin (beta-HIVS), a compound isolated from Lithospermium radix, most efficiently induced cell-death in two lines of lung cancer cells, namely, NCI-H522 and DMS114, whereas shikonin was effective against a wide variety of tumor cell lines. During our studies of the mechanism of action of beta-HIVS on tumor cells, we found that this compound inhibited protein tyrosine kinase (PTK) activity. The tyrosine kinase activities of a receptor for EGF (EGFR) and v-Src were strongly inhibited and that of KDR/Flk-1 was weakly inhibited by beta-HIVS. The inhibition by beta-HIVS of the activities of EGFR and v-Src was much stronger than that by shikonin. The IC50 values of beta-HIVS for EGFR and v-Src were approximately 0.7 microM and 1 microM, respectively. Moreover, the inhibition of v-Src by beta-HIVS was non-competitive with respect to ATP. These results strongly suggest that the action of beta-HIVS, as well as that of shikonin, involves the inhibition of PTK, and they also suggest the possibility of producing a novel group of PTK inhibitors based on shikonin as the parent compound.
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Affiliation(s)
- Sachiko Hashimoto
- The Laboratory of Biological Chemistry, School of Pharmaceutical Sciences, Showa University, Shinagawa-ku, Tokyo 142-8555, Japan
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43
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Gao D, Hiromura M, Yasui H, Sakurai H. Direct reaction between shikonin and thiols induces apoptosis in HL60 cells. Biol Pharm Bull 2002; 25:827-32. [PMID: 12132652 DOI: 10.1248/bpb.25.827] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Shikonin (beta-alkannin), a naphthoquinone compound, was found to induce apoptotic features such as chromatin condensation, DNA fragmentation, and activation of caspase 3 in HL60 cells. The mechanism was examined in terms of oxidative stress in the cells. Exposure of the cells to shikonin greatly reduced the total thiols, protein thiols, and glutathione levels, however, lipid peroxide levels were enhanced. The depletion of thiol levels in the cells was thus thought to induce lipid peroxidation and DNA fragmentation. An electron spin resonance study revealed that shikonin reacts directly with glutathione and other oxidative stress-relevant compounds in the lysate of HL60 cells. Pretreatment of such cells with N-acetylcysteine before shikonin treatment completely inhibited the DNA fragmentation. From these results, it was proposed that the chemical reaction between shikonin and cellular thiols such as glutathione and protein thiols induces apoptosis in HL60 cells.
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Affiliation(s)
- Dayuan Gao
- Department of Analytical and Bioinorganic Chemistry, Kyoto Pharmaceutical University, Japan
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44
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Kajimoto S, Takanashi N, Kajimoto T, Xu M, Cao J, Masuda Y, Aiuchi T, Nakajo S, Ida Y, Nakaya K. Sophoranone, extracted from a traditional Chinese medicine Shan Dou Gen, induces apoptosis in human leukemia U937 cells via formation of reactive oxygen species and opening of mitochondrial permeability transition pores. Int J Cancer 2002; 99:879-90. [PMID: 12115492 DOI: 10.1002/ijc.10414] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Screening of various natural products in a search for novel inducers of apoptosis in human leukemia cells led us to identify the strong apoptosis-inducing activity in a fraction extracted with methanol from the roots of Sophora subprostrata Chun et T. Chen. We purified the compound that induced apoptosis in human leukemia cells and identified it as sophoranone. Sophoranone inhibited cell growth and induced apoptosis in various lines of cells from human solid tumors, with 50% inhibition of growth of human stomach cancer MKN7 cells at 1.2 +/- 0.3 microM. The growth-inhibitory and apoptosis-inducing activities of sophoranone for leukemia U937 cells were very much stronger than those of other flavonoids, such as daidzein, genistein and quercetin. At the early stages of treatment of U937 cells with sophoranone, reactive oxygen species were formed, mitochondrial permeability pores were opened and cytochrome c was released from mitochondria. Cytochrome c was also released upon treatment of isolated mitochondria with sophoranone. Inhibitors of complexes III and IV, but not complexes I and II, of the mitochondrial respiratory chain prevented the release of cytochrome c from isolated mitochondria by sophoranone, as well as the induction of apoptosis in U937 cells in response to sophoranone. Our results indicate that sophoranone might be a unique apoptosis-inducing anticancer agent that targets mitochondria.
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Affiliation(s)
- Sachiko Kajimoto
- The Laboratories of Biological Chemistry, School of Pharmaceutical Sciences, Showa University, Tokyo, Japan
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45
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Chen X, Yang L, Oppenheim JJ, Howard MZ. Cellular pharmacology studies of shikonin derivatives. Phytother Res 2002; 16:199-209. [PMID: 12164262 DOI: 10.1002/ptr.1100] [Citation(s) in RCA: 302] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The naphthoquinone pigment, shikonin, isolated from Lithospermum erythrorhizon Sieb. et Zucc.(Boraginaceae) and its derivatives are the active components isolated from the Chinese herbal therapeutic, Zicao. Historically, Zicao root extracts have been used to treat macular eruption, measles, sore-throat, carbuncles and burns. Multiple pharmacological actions have been attributed to shikonin, e.g. antiinflammatory, antigonadotropic and anti-HIV-1 activity. In this review, several therapeutic applications of shikonin will be summarized including its pleiotropic, antiinflammatory and antitumour effects. Widely diverse and sometimes conflicting activities have been attributed to shikonin, e.g. wound healing, enhanced granuloma formation, suppression of local acute inflammatory reactions, inhibition of angiogenesis, inhibition of select chemokine ligands, inhibition of DNA topoisomerase activity, inhibition of platelet activation and antimicrobial activity. Comparison of the various reported mechanisms of action for shikonin lead us to hypothesize that shikonin is an effective inhibitor of protein-protein interaction with multiple targets in both the intracellular and extracellular compartments. This general inhibitory effect can account for the broad spectrum of shikonin biological and pharmacological activities.
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Affiliation(s)
- Xin Chen
- Laboratory of Molecular Immunoregulation, Division of Basic Sciences, National Cancer Institute-Frederick, MD 21702-1201, USA
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46
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Kamei R, Kitagawa Y, Kadokura M, Hattori F, Hazeki O, Ebina Y, Nishihara T, Oikawa S. Shikonin stimulates glucose uptake in 3T3-L1 adipocytes via an insulin-independent tyrosine kinase pathway. Biochem Biophys Res Commun 2002; 292:642-51. [PMID: 11922615 DOI: 10.1006/bbrc.2002.6714] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Type 2 diabetes is due to defects in both insulin action and secretion. In an attempt to discover small molecules that stimulate glucose uptake, similar to insulin, a cell-based glucose uptake screening assay was performed using 3T3-L1 adipocytes. Shikonin, a substance originally isolated from the root of the Chinese plant that has been used as an ointment for wound healing, was thus identified. Shikonin stimulated glucose uptake and potentiated insulin-stimulated glucose uptake in a concentration-dependent manner in 3T3-L1 adipocytes. Stimulation of glucose uptake was also observed in rat primary adipocytes and cardiomyocytes. Like insulin, shikonin-stimulated glucose uptake was inhibited by genistein, a tyrosine kinase inhibitor, and enhanced by vanadate, a tyrosine phosphatase inhibitor. However, in contrast to insulin, shikonin-stimulated glucose uptake was not strongly inhibited by wortmannin, a specific inhibitor of phosphatidylinositol 3-kinase (PI3K). In vitro phosphorylation analyses revealed that shikonin did not induce tyrosine phosphorylation of the insulin receptor, but significantly induced both Thr-308 and Ser-473 phosphorylation of Akt. Our results suggest that in 3T3-L1 adipocytes, shikonin action is not mediated primarily via the insulin receptor/PI3K pathway, but rather via another distinct tyrosine kinase-dependent pathway leading to glucose uptake involving Akt phosphorylation.
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Affiliation(s)
- Reiko Kamei
- Suntory Biomedical Research Limited, 1-1-1 Wakayamadai, Shimamoto-cho, Mishima-gun, Osaka 618-8503, Japan
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47
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Kim SH, Kang IC, Yoon TJ, Park YM, Kang KS, Song GY, Ahn BZ. Antitumor activities of a newly synthesized shikonin derivative, 2-hyim-DMNQ-S-33. Cancer Lett 2001; 172:171-5. [PMID: 11566493 DOI: 10.1016/s0304-3835(01)00665-6] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
2- or 6-(1-hydroxyiminoalkyl)-5,8-dimethoxy-1, 4-naphthoquinone(2- or 6-hyim-DMNQ) derived from the roots of Lithospermum erythrorhizon was synthesized for the evaluation of antitumor activities. Among those derivatives, 2-hyim-DMNQ-S33 was found to be a potent anticancer agent. This compound suppressed the proliferation of Radiation Induced Fibrosarcoma (RIF) cells in a dose-dependent manner. 2-hyim-DMNQ-S33 significantly prolonged the survival time by 239% as compared with Sarcoma 180 tumor-bearing control mice in vivo. We found that the compound significantly suppressed phosphorylation of extracellular signal-regulated kinase (pERK) and activated c-jun-N-terminal kinase (JNK) and protein kinase C (PKC)-alpha following 4 h-treatment. These findings indicate that 2-hyim-DMSQ-S33 exerts antitumor activities by regulating pERK, JNK and PKC-alpha.
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Affiliation(s)
- S H Kim
- Department of Oncology, Graduate School of East-West Medical Science, KyungHee University, 1 Seochun-ri, Kiheung-eup, 449-701, Yongin, South Korea.
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48
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Iwama K, Nakajo S, Aiuchi T, Nakaya K. Apoptosis induced by arsenic trioxide in leukemia U937 cells is dependent on activation of p38, inactivation of ERK and the Ca2+-dependent production of superoxide. Int J Cancer 2001; 92:518-26. [PMID: 11304686 DOI: 10.1002/ijc.1220] [Citation(s) in RCA: 92] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The mechanism of the induction of apoptosis by arsenic trioxide (As2O3), which was demonstrated recently to be an effective inducer of apoptosis in patients with leukemia, was examined in detail in human leukemia U937 cells. Upon treatment of U937 cells with 50 microM of As2O3, complete inactivation of the kinases ERK1 and ERK2 was detected within 30 min. p38 was activated within 3 hr, and the maximum activity was detected at 6 hr, when DNA fragmentation remained undetectable. Experiments with transfected cells that expressed constitutively activated MEK1 and a specific inhibitor of p38 also suggested that inactivation of ERKs and activation of p38 might be associated with the induction of apoptosis by As2O3. In contrast to the inactivation of ERKs and the activation of p38, activation of JNK by As2O3 appeared to protect cells against the induction of apoptosis. Treatment of U937 cells with As2O3 also caused the Ca2+-dependent production of superoxide and intracellular acidification and a decrease in the mitochondrial membrane potential at the early stages of induction of apoptosis by As2O3. These changes preceded the release of cytochrome c from mitochondria and the activation of caspase-3. It should be possible to exploit the unusual characteristics of the mechanism of induction of apoptosis by As2O3 in U937 cells by making use of synergistic effects of this compound with other inducers of apoptosis.
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Affiliation(s)
- K Iwama
- Laboratory of Biological Chemistry, School of Pharmaceutical Sciences, Showa University, Tokyo, Japan
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Du J, Suzuki H, Nagase F, Akhand AA, Yokoyama T, Miyata T, Kurokawa K, Nakashima I. Methylglyoxal induces apoptosis in Jurkat leukemia T cells by activating c-Jun N-terminal kinase. J Cell Biochem 2000; 77:333-44. [PMID: 10723098 DOI: 10.1002/(sici)1097-4644(20000501)77:2<333::aid-jcb15>3.0.co;2-q] [Citation(s) in RCA: 91] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Methylglyoxal (MG) is a physiological metabolite, but it is known to be toxic, inducing stress in cells and causing apoptosis. This study examines molecular mechanisms in the MG-induced signal transduction leading to apoptosis, focusing particularly on the role of JNK activation. We first confirmed that MG caused apoptosis in Jurkat cells and that it was cell type dependent because it failed to induce apoptosis in MOLT-4, HeLa, or COS-7 cells. A caspase inhibitor, Z-DEVD-fmk, completely blocked MG-induced poly(ADP-ribose)polymerase (PARP) cleavage and apoptosis, showing the critical role of caspase activation. Inhibition of JNK activity by a JNK inhibitor, curcumin, remarkably reduced MG-induced caspase-3 activation, PARP cleavage, and apoptosis. Stable expression of the dominant negative mutant of JNK also protected cells against apoptosis notably, although not completely. Correspondingly, loss of the mitochondrial membrane potential induced by MG was decreased by the dominant negative JNK. These results confirmed a crucial role of JNK working upstream of caspases, as well as an involvement of JNK in affecting the mitochondrial membrane potential.
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Affiliation(s)
- J Du
- Department of Immunology, Nagoya University School of Medicine, Aichi 466-8550, Japan
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