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Ahn JH, Yu HK, Lee HJ, Hong SW, Kim SJ, Kim JS. Suppression of colorectal cancer liver metastasis by apolipoprotein(a) kringle V in a nude mouse model through the induction of apoptosis in tumor-associated endothelial cells. PLoS One 2014; 9:e93794. [PMID: 24699568 PMCID: PMC3974802 DOI: 10.1371/journal.pone.0093794] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Accepted: 03/07/2014] [Indexed: 12/13/2022] Open
Abstract
The formation of liver metastases in colorectal cancer patients is the primary cause of patient death. Current therapies directed at liver metastasis from colorectal cancer have had minimal impact on patient outcomes. Therefore, the development of alternative treatment strategies for liver metastasis is needed. In the present study, we demonstrated that recombinant human apolipoprotein(a) kringle V, also known as rhLK8, induced the apoptotic turnover of endothelial cells in vitro through the mitochondrial apoptosis pathway. The interaction of rhLK8 with glucose-regulated protein 78 (GRP78) may be involved in the induction of apoptosis because the inhibition of GRP78 by GRP78-specific antibodies or siRNA knockdown inhibited the rhLK8-mediated apoptosis of human umbilical vein endothelial cells in vitro. Next, to evaluate the effects of rhLK8 on angiogenesis and metastasis, an experimental model of liver metastasis was established by injecting a human colorectal cancer cell line, LS174T, into the spleens of BALB/c nude mice. The systemic administration of rhLK8 significantly suppressed liver metastasis from human colorectal cancer cells and improved host survival compared with controls. The combination of rhLK8 and 5-fluorouracil substantially increased these survival benefits compared with either therapy alone. Histological observation showed significant induction of apoptosis among tumor-associated endothelial cells in liver metastases from rhLK8-treated mice compared with control mice. Collectively, these results suggest that the combination of rhLK8 with conventional chemotherapy may be a promising approach for the treatment of patients with life-threatening colorectal cancer liver metastases.
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Affiliation(s)
- Jin-Hyung Ahn
- Cancer Biology Team, Mogam Biotechnology Research Institute, Yongin, Republic of Korea
| | - Hyun-Kyung Yu
- Cancer Biology Team, Mogam Biotechnology Research Institute, Yongin, Republic of Korea
| | - Ho-Jeong Lee
- Cancer Biology Team, Mogam Biotechnology Research Institute, Yongin, Republic of Korea
- Department of Cancer Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America
| | - Soon Won Hong
- Department of Pathology, Gangnam Sevrance Hospital, Yonsei University, Seoul, Republic of Korea
| | - Sun Jin Kim
- Department of Cancer Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas, United States of America
- * E-mail: (JSK); (SJK)
| | - Jang-Seong Kim
- Cancer Biology Team, Mogam Biotechnology Research Institute, Yongin, Republic of Korea
- Research Center of Integrative Cellulomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon, Republic of Korea
- * E-mail: (JSK); (SJK)
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Targeted antivascular therapy with the apolipoprotein(a) kringle V, rhLK8, inhibits the growth and metastasis of human prostate cancer in an orthotopic nude mouse model. Neoplasia 2012; 14:335-43. [PMID: 22577348 DOI: 10.1593/neo.12380] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2012] [Revised: 03/12/2012] [Accepted: 03/13/2012] [Indexed: 11/18/2022] Open
Abstract
Antivascular therapy has emerged as a rational strategy to improve the treatment of androgen-independent prostate cancer owing to the necessity of establishing a vascular network for the growth and progression of the primary and metastatic tumor. We determined whether recombinant human apolipoprotein(a) kringle V, rhLK8, produces therapeutic efficacy in an orthotopic human prostate cancer animal model. Fifty thousand androgen-independent human prostate cancer cells (PC-3MM2) were injected into the prostate of nude mice. After 3 days, these mice were randomized to receive the vehicle solution (intraperitoneally [i.p.], daily), paclitaxel (8 mg/kg i.p., weekly), rhLK8 (50 mg/kg i.p., daily), or a combination of paclitaxel and rhLK8 for 4 weeks. Treatment with paclitaxel or rhLK8 alone did not show significant therapeutic effects on tumor incidence or on tumor size compared with the control group. The combination of rhLK8 and paclitaxel significantly reduced tumor size and incidence of lymph node metastasis. Significant reduction in microvessel density and cellular proliferation and induction of apoptosis of tumor cells, and tumor-associated endothelial cells, were also achieved. Similarly, PC-3MM2 tumors growing in the tibia showed significant suppression of tumor growth and lymph node metastasis by the combination treatment with rhLK8 and paclitaxel. The integrity of the bone was significantly preserved, and apoptosis of tumor cells and tumor-associated endothelial cells was increased. In conclusion, these results suggest that targeting the tumor microenvironment with the antivascular effect of rhLK8 combined with conventional cytotoxic chemotherapy could be a new and effective approach in the treatment of androgen-independent prostate cancer and their metastases.
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Lee HJ, Yu HK, Ahn JH, Park YK, Yoon Y, Kim JS, Kim SJ. Repeated intravenous infusion of human apolipoprotein(a) kringle V is associated with reversible dose-dependent acute tubulointerstitial nephritis without affecting glomerular filtration function. Toxicol Lett 2012; 212:298-306. [DOI: 10.1016/j.toxlet.2012.05.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2012] [Revised: 05/16/2012] [Accepted: 05/22/2012] [Indexed: 11/27/2022]
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Lim Y, Jo DH, Kim JH, Ahn JH, Hwang YK, Kang DK, Chang SI, Yu YS, Yoon Y, Kim JH. Human apolipoprotein(a) kringle V inhibits ischemia-induced retinal neovascularization via suppression of fibronectin-mediated angiogenesis. Diabetes 2012; 61:1599-608. [PMID: 22427380 PMCID: PMC3357289 DOI: 10.2337/db11-1541] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Retinal neovascularization is observed in progression of diabetic retinopathy. New vessels grow into the vitreous cavity in proliferative diabetic retinopathy, resulting in traction retinal detachment and vitreous hemorrhage. To overcome the catastrophic visual loss due to these complications, efforts have been focused on the treatment of retinal neovascularization. In this study, we demonstrated the inhibitory effect of recombinant human apolipoprotein(a) kringle V (rhLK8) in an animal model of ischemia-induced retinal neovascularization. rhLK8 induced no definite toxicity on endothelial cells and retinal tissues at the therapeutic dosage. Interestingly, rhLK8 showed antiangiogenic effect, particularly on fibronectin-mediated migration of endothelial cells. Further experiments demonstrated high binding affinity of rhLK8 to α3β1 integrin, and suppression of it might be the mechanism of antiangiogenic effect of rhLK8. Furthermore, rhLK8 inhibited phosphorylation of focal adhesion kinase, resulting in suppression of activation of consequent p130CAS-Jun NH(2)-terminal kinase. Taken together, our data suggested the possible application of rhLK8 in the treatment of retinal neovascularization by suppression of fibronectin-mediated angiogenesis.
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Affiliation(s)
- Yangmi Lim
- Mogam Biotechnology Research Institute, Yongin, Kyonggi-do, Republic of Korea
| | - Dong Hyun Jo
- Fight Against Angiogenesis-Related Blindness (FARB) Laboratory, Clinical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea
- Department of Biomedical Sciences, College of Medicine, Seoul National University, Seoul, Republic of Korea
- Department of Ophthalmology, College of Medicine, Seoul National University, Seoul, Republic of Korea
| | - Jin Hyoung Kim
- Fight Against Angiogenesis-Related Blindness (FARB) Laboratory, Clinical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea
| | - Jin-Hyung Ahn
- Mogam Biotechnology Research Institute, Yongin, Kyonggi-do, Republic of Korea
| | - Yu Kyeong Hwang
- Mogam Biotechnology Research Institute, Yongin, Kyonggi-do, Republic of Korea
| | - Dong-Ku Kang
- Department of Biochemistry, Chungbuk National University, Cheongju, Republic of Korea
| | - Soo-Ik Chang
- Department of Biochemistry, Chungbuk National University, Cheongju, Republic of Korea
| | - Young Suk Yu
- Fight Against Angiogenesis-Related Blindness (FARB) Laboratory, Clinical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea
- Department of Biomedical Sciences, College of Medicine, Seoul National University, Seoul, Republic of Korea
| | - Yeup Yoon
- Mogam Biotechnology Research Institute, Yongin, Kyonggi-do, Republic of Korea
- Corresponding authors:Yeup Yoon, , and Jeong Hun Kim,
| | - Jeong Hun Kim
- Fight Against Angiogenesis-Related Blindness (FARB) Laboratory, Clinical Research Institute, Seoul National University Hospital, Seoul, Republic of Korea
- Department of Biomedical Sciences, College of Medicine, Seoul National University, Seoul, Republic of Korea
- Department of Ophthalmology, College of Medicine, Seoul National University, Seoul, Republic of Korea
- Corresponding authors:Yeup Yoon, , and Jeong Hun Kim,
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Ahn JH, Lee HJ, Lee EK, Yu HK, Lee TH, Yoon Y, Kim SJ, Kim JS. Antiangiogenic kringles derived from human plasminogen and apolipoprotein(a) inhibit fibrinolysis through a mechanism that requires a functional lysine-binding site. Biol Chem 2011; 392:347-56. [PMID: 21194375 DOI: 10.1515/bc.2011.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Many proteins in the fibrinolysis pathway contain antiangiogenic kringle domains. Owing to the high degree of homology between kringle domains, there has been a safety concern that antiangiogenic kringles could interact with common kringle proteins during fibrinolysis leading to adverse effects in vivo. To address this issue, we investigated the effects of several antiangiogenic kringle proteins including angiostatin, apolipoprotein(a) kringles IV(9)-IV(10)-V (LK68), apolipoprotein(a) kringle V (rhLK8) and a derivative of rhLK8 mutated to produce a functional lysine-binding site (Lys-rhLK8) on the entire fibrinolytic process in vitro and analyzed the role of lysine binding. Angiostatin, LK68 and Lys-rhLK8 increased clot lysis time in a dose-dependent manner, inhibited tissue-type plasminogen activator-mediated plasminogen activation on a thrombin-modified fibrinogen (TMF) surface, showed binding to TMF and significantly decreased the amount of plasminogen bound to TMF. The inhibition of fibrinolysis by these proteins appears to be dependent on their functional lysine-binding sites. However, rhLK8 had no effect on these processes owing to an inability to bind lysine. Collectively, these results indicate that antiangiogenic kringles without lysine binding sites might be safer with respect to physiological fibrinolysis than lysine-binding antiangiogenic kringles. However, the clinical significance of these findings will require further validation in vivo.
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Affiliation(s)
- Jin-Hyung Ahn
- Cancer Biology Team, Mogam Biotechnology Research Institute, Yongin, Kyonggi-do, South Korea
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Maya D, Quintero MJ, de la Cruz Muñoz-Centeno M, Chávez S. Systems for applied gene control in Saccharomyces cerevisiae. Biotechnol Lett 2008; 30:979-87. [DOI: 10.1007/s10529-008-9647-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2007] [Revised: 01/14/2008] [Accepted: 01/17/2008] [Indexed: 01/06/2023]
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