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He Z, Lin J, Peng D, Zeng J, Pan X, Zheng R, Li P, Du B. Peptide fractions from Sacha inchi induced apoptosis in HepG2 cells via P53 activation and a mitochondria-mediated pathway. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2023; 103:7621-7630. [PMID: 37495560 DOI: 10.1002/jsfa.12845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 07/04/2023] [Accepted: 07/27/2023] [Indexed: 07/28/2023]
Abstract
BACKGROUND Sacha inchi is known for its high protein content and medicinal properties. Bioactive peptides have been reported to have therapeutic potential in various human diseases. However, there is a lack of research evaluating the pharmacological value of peptides derived from Sacha inchi. Therefore, this study aimed to investigate the anti-hepatoma effect of Sacha inchi peptides (SPs) and their underlying mechanism. RESULTS The study found that treatment with SPs significantly reduced the proliferation of HepG2 cells by inducing apoptosis and arresting the cell cycle at the G0/G1 phase. SPs also induced HepG2 cell apoptosis by increasing the levels of proteins such as Bax, Caspase-3 and P53. The study identified nine novel peptides in SPs, of which LLEPDVR, ALVEKAKAS and TGDGSLRPY exhibited higher cell proliferative inhibition rates compared to other peptides. CONCLUSION The findings of this study suggest that Sacha inchi peptides have potential pharmacological effects in the treatment of liver cancer. SPs effectively suppress the cell cycle and facilitate cell apoptosis, indicating their anti-hepatoma effect. The novel peptides identified in SPs may have therapeutic value for liver cancer treatment. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Zhilin He
- College of Food Science, South China Agricultural University, Guangzhou, China
| | - Jinming Lin
- College of Food Science, South China Agricultural University, Guangzhou, China
| | - Dong Peng
- College of Food Science, South China Agricultural University, Guangzhou, China
| | - Jieyu Zeng
- College of Food Science, South China Agricultural University, Guangzhou, China
| | - Xiangmin Pan
- College of Food Science, South China Agricultural University, Guangzhou, China
| | - Rui Zheng
- College of Food Science, South China Agricultural University, Guangzhou, China
| | - Pan Li
- College of Food Science, South China Agricultural University, Guangzhou, China
| | - Bing Du
- College of Food Science, South China Agricultural University, Guangzhou, China
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Liu Q, Wang L, He D, Wu Y, Liu X, Yang Y, Chen Z, Dong Z, Luo Y, Song Y. Application Value of Antimicrobial Peptides in Gastrointestinal Tumors. Int J Mol Sci 2023; 24:16718. [PMID: 38069041 PMCID: PMC10706433 DOI: 10.3390/ijms242316718] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 11/17/2023] [Accepted: 11/22/2023] [Indexed: 12/18/2023] Open
Abstract
Gastrointestinal cancer is a common clinical malignant tumor disease that seriously endangers human health and lacks effective treatment methods. As part of the innate immune defense of many organisms, antimicrobial peptides not only have broad-spectrum antibacterial activity but also can specifically kill tumor cells. The positive charge of antimicrobial peptides under neutral conditions determines their high selectivity to tumor cells. In addition, antimicrobial peptides also have unique anticancer mechanisms, such as inducing apoptosis, autophagy, cell cycle arrest, membrane destruction, and inhibition of metastasis, which highlights the low drug resistance and high specificity of antimicrobial peptides. In this review, we summarize the related studies on antimicrobial peptides in the treatment of digestive tract tumors, mainly oral cancer, esophageal cancer, gastric cancer, liver cancer, pancreatic cancer, and colorectal cancer. This paper describes the therapeutic advantages of antimicrobial peptides due to their unique anticancer mechanisms. The length, net charge, and secondary structure of antimicrobial peptides can be modified by design or modification to further enhance their anticancer effects. In summary, as an emerging cancer treatment drug, antimicrobial peptides need to be further studied to realize their application in gastrointestinal cancer diseases.
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Affiliation(s)
- Qi Liu
- College of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
| | - Lei Wang
- College of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
| | - Dongxia He
- College of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
| | - Yuewei Wu
- College of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
| | - Xian Liu
- College of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
| | - Yahan Yang
- College of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
| | - Zhizhi Chen
- College of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
| | - Zhan Dong
- College of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
| | - Ying Luo
- College of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
| | - Yuzhu Song
- College of Life Science and Technology, Kunming University of Science and Technology, Kunming 650500, China
- Medical College, Kunming University of Science and Technology, Kunming 650500, China
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High Level Expression and Purification of Cecropin-like Antimicrobial Peptides in Escherichia coli. Biomedicines 2022; 10:biomedicines10061351. [PMID: 35740373 PMCID: PMC9220022 DOI: 10.3390/biomedicines10061351] [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: 05/18/2022] [Revised: 06/05/2022] [Accepted: 06/06/2022] [Indexed: 11/21/2022] Open
Abstract
Cecropins are a family of antimicrobial peptides (AMPs) that are widely found in the innate immune system of Cecropia moths. Cecropins exhibit a broad spectrum of antimicrobial and anticancer activities. The structures of Cecropins are composed of 34–39 amino acids with an N-terminal amphipathic α-helix, an AGP hinge and a hydrophobic C-terminal α-helix. KR12AGPWR6 was designed based on the Cecropin-like structural feature. In addition to its antimicrobial activities, KR12AGPWR6 also possesses enhanced salt resistance, antiendotoxin and anticancer properties. Herein, we have developed a strategy to produce recombinant KR12AGPWR6 through a salt-sensitive, pH and temperature dependent intein self-cleavage system. The His6-Intein-KR12AGPWR6 was expressed by E. coli and KR12AGPWR6 was released by the self-cleavage of intein under optimized ionic strength, pH and temperature conditions. The molecular weight and structural feature of the recombinant KR12AGPWR6 was determined by MALDI-TOF mass, CD, and NMR spectroscopy. The recombinant KR12AGPWR6 exhibited similar antimicrobial activities compared to the chemically synthesized KR12AGPWR6. Our results provide a potential strategy to obtain large quantities of AMPs and this method is feasible and easy to scale up for commercial production.
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Park AR, Kim SW, Kim SY, Kwon KC. Expression of Antimicrobial Peptide (AMP), Cecropin B, in a Fused Form to SUMO Tag With or Without Three-Glycine Linker in Escherichia coli and Evaluation of Bacteriolytic Activity of the Purified AMP. Probiotics Antimicrob Proteins 2021; 13:1780-1789. [PMID: 34018140 PMCID: PMC8578067 DOI: 10.1007/s12602-021-09797-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/06/2021] [Indexed: 01/10/2023]
Abstract
Current antibiotics have limited action mode, which makes it difficult for the antibiotics dealing with the emergence of bacteria resisting the existing antibiotics. As a need for new bacteriolytic agents alternative to the antibiotics, AMPs have long been considered substitutes for the antibiotics. Cecropin B was expressed in a fusion form to six-histidine and SUMO tags in Escherichia coli. Six-histidine tag attached to SUMO was for purification of SUMO-cecropin B fusion proteins and removal of the SUMO tag from cecropin B. Chimeric gene was constructed into pKSEC1 vector that was designed to be functional in both Escherichia coli and chloroplast. To maximize translation of the fusion protein, sequences were codon-optimized. Four different constructs were tested for the level of expression and solubility, and the construct with a linker, 6xHisSUMO3xGly-cecropin B, showed the highest expression. In addition, cleavage of the SUMO tag by SUMOase in the three fusion constructs which have no linker sequence (3xGly, three glycines) was not as efficient as the construct with the linker between SUMO and cecropin B. The cleaved cecropin B showed bacteriolytic activity against Bacillus subtilis at a concentration of 0.0625 μg/μL, while cecropin B fused to SUMO had no activity at a higher concentration, 0.125 μg/μL. As an expression system for AMPs in prokaryotic hosts, the use of tag proteins and appropriate codon-optimization strategy can be employed and further genetic modification of the fusion construct should help the complete removal of the tag proteins from the AMP in the final step of purification.
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Affiliation(s)
- A Rom Park
- Department of Biological Sciences, Andong National University, Andong, Korea
| | - Seon Woong Kim
- Department of Biological Sciences, Andong National University, Andong, Korea
| | - Soon Young Kim
- Department of Biological Sciences, Andong National University, Andong, Korea.
| | - Kwang-Chul Kwon
- MicroSynbiotiX Ltd, 11011 N Torrey Pines Rd Ste #135, La Jolla, CA, 92037, USA.
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Qian Z, Chen M, Chen J, Zhang Y, Zhou C, Hong P, Yang P. Intracellular ethanol-mediated oxidation and apoptosis in HepG2/CYP2E1 cells impaired by two active peptides from seahorse ( Hippocampus kuda bleeler) protein hydrolysates via the Nrf2/HO-1 and akt pathways. Food Sci Nutr 2021; 9:1584-1602. [PMID: 33747471 PMCID: PMC7958582 DOI: 10.1002/fsn3.2133] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 01/05/2021] [Accepted: 01/05/2021] [Indexed: 12/13/2022] Open
Abstract
Seahorse (Hippocampus kuda Bleeler) are representative marine species in aquaculture, with special value of medicine and food. In this study, the protective effects of two peptides from seahorse hydrolysates (SHP-1 and SHP-2) against ethanol-mediated oxidative stress in HepG2/CYP2E1 cells were investigated. Firstly, SHP-1 and SHP-2 presented no cytotoxicity. Compared with the ethanol-treated groups, SHP-1 and SHP-2 increased cell viability in a concentration-dependent manner. Secondly, SHP-1 and SHP-2 markedly reduced intracellular reactive oxygen species (ROS) generation, gamma-glutamyltranspeptidase (GGT) activity, and tumor necrosis factor-α (TNF-α) levels and remarkably enhanced superoxide dismutase (SOD) and glutathione (GSH) activities. SHP-1 and SHP-2 also down-regulated the expressions of GGT, bax, c-caspase-8/-9/-3, p-Akt, p-IκB-α, p-p65, p-ERK, and p-p38 but up-regulated SOD, GSH, NF-E2-related factor 2 (Nrf2), heme oxygenase-1 (HO-1), and bcl-2 levels, as revealed by Western blot analysis. Moreover, SHP-1 and SHP-2 increased the mitochondrial membrane potential (MMP), reduced DNA damage, and suppressed the nuclear translocation of p65. These results suggest that two peptides from seahorse hydrolysates can be considered a potential functional biomaterial and further improve the use value of seahorse in aquaculture.
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Affiliation(s)
- Zhong‐Ji Qian
- Shenzhen Institute of Guangdong Ocean UniversityShenzhenChina
- Southern Marine Science and Engineering Guangdong LaboratoryZhanjiangChina
- School of Chemistry and EnvironmentCollege of Food Science and TechnologyGuangdong Ocean UniversityZhanjiangChina
| | - Mei‐Fang Chen
- Shenzhen Institute of Guangdong Ocean UniversityShenzhenChina
- Southern Marine Science and Engineering Guangdong LaboratoryZhanjiangChina
- School of Chemistry and EnvironmentCollege of Food Science and TechnologyGuangdong Ocean UniversityZhanjiangChina
| | - Jiali Chen
- Lengshuitan Bezirk Agricultural and Rural BureauYongzhou CityChina
| | - Yi Zhang
- Shenzhen Institute of Guangdong Ocean UniversityShenzhenChina
- School of Chemistry and EnvironmentCollege of Food Science and TechnologyGuangdong Ocean UniversityZhanjiangChina
| | - Chunxia Zhou
- Shenzhen Institute of Guangdong Ocean UniversityShenzhenChina
- Southern Marine Science and Engineering Guangdong LaboratoryZhanjiangChina
- School of Chemistry and EnvironmentCollege of Food Science and TechnologyGuangdong Ocean UniversityZhanjiangChina
| | - Pengzhi Hong
- Southern Marine Science and Engineering Guangdong LaboratoryZhanjiangChina
- School of Chemistry and EnvironmentCollege of Food Science and TechnologyGuangdong Ocean UniversityZhanjiangChina
| | - Ping Yang
- School of Chemistry and EnvironmentCollege of Food Science and TechnologyGuangdong Ocean UniversityZhanjiangChina
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Antimicrobial Peptides with Enhanced Salt Resistance and Antiendotoxin Properties. Int J Mol Sci 2020; 21:ijms21186810. [PMID: 32948086 PMCID: PMC7554977 DOI: 10.3390/ijms21186810] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 09/08/2020] [Accepted: 09/12/2020] [Indexed: 12/14/2022] Open
Abstract
A strategy was described to design antimicrobial peptides (AMPs) with enhanced salt resistance and antiendotoxin activities by linking two helical AMPs with the Ala-Gly-Pro (AGP) hinge. Among the designed peptides, KR12AGPWR6 demonstrated the best antimicrobial activities even in high salt conditions (NaCl ~300 mM) and possessed the strongest antiendotoxin activities. These activities may be related to hydrophobicity, membrane-permeability, and α-helical content of the peptide. Amino acids of the C-terminal helices were found to affect the peptide-induced permeabilization of LUVs, the α-helicity of the designed peptides under various LUVs, and the LPS aggregation and size alternation. A possible model was proposed to explain the mechanism of LPS neutralization by the designed peptides. These findings could provide a new approach for designing AMPs with enhanced salt resistance and antiendotoxin activities for potential therapeutic applications.
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Ziaja M, Dziedzic A, Szafraniec K, Piastowska-Ciesielska A. Cecropins in cancer therapies-where we have been? Eur J Pharmacol 2020; 882:173317. [PMID: 32603694 DOI: 10.1016/j.ejphar.2020.173317] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Revised: 06/23/2020] [Accepted: 06/24/2020] [Indexed: 11/29/2022]
Abstract
Oncological diseases are invariably a challenge for the modern world. Therefore, in recent decades, scientists have begun to look for compounds of natural origin that will be able to support or independently be used in oncological therapy. Among the antimicrobial proteins (AMPs), a promising family of peptides isolated from the immunized hemolymph of Hyalophora cecropia pupae has been distinguished. The cecropin family is not only characterized by antimicrobial and antifungal properties, but most importantly also has anticancer properties. Their antitumor potential is confirmed by in vitro studies conducted on several different cell lines, among others, prostate and breast cancer cell lines. This paper presents publications demonstrating cytolytic properties against tumour cells of members belonging to the cecropin family, as well as synthesized cecropin B with the introduced modification of its sequence and conjugated cecropin B with a modified luteinizing hormone-releasing hormone (LHRH). Moreover, three models of cecropin mechanisms of action are also described. The benefits and limitations associated with the use of these peptides in oncological therapy have also been demonstrated.
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Affiliation(s)
- Maksymilian Ziaja
- Medical University of Lodz, Department of Cell Culture and Genomic Analysis, Poland.
| | - Ada Dziedzic
- Medical University of Lodz, Department of Cell Culture and Genomic Analysis, Poland
| | - Kacper Szafraniec
- Medical University of Lodz, Department of Cell Culture and Genomic Analysis, Poland
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Xing XW, Sun YF, Zhao J, Pan ZX, Jiang WX. Tizanidine hydrochloride exhibits a cytotoxic effect on osteosarcoma cells through the PI3K/AKT signaling pathway. J Int Med Res 2019; 47:3792-3802. [PMID: 31179788 PMCID: PMC6726809 DOI: 10.1177/0300060519850395] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Objectives α2-adrenergic receptors are reportedly involved in cancer cell proliferation, invasion, and apoptosis through regulation of diverse molecules, which implies that it contributes to tumor progression. However, the functional significance of α2-adrenergic receptors in osteosarcoma (OS) is unclear. Tizanidine hydrochloride (THC), an α2-adrenergic receptor agonist, is often used to alleviate symptoms of spasticity. This study investigated the functional implications of THC treatment on human OS cells and the underlying mechanisms of resulting changes. Methods The proliferation of U2 OS cells was assessed by Cell Counting Kit-8; the migration and invasion capacities of U2 OS cells were then analyzed by transwell assay. Moreover, apoptosis in U2 OS cells was evaluated by flow cytometry and western blot analyses. Additionally, expression levels of key proteins in the phosphatidylinositol-3-kinase (PI3K)/protein kinase B (AKT) signaling pathway were measured. Results THC inhibited the proliferation, migration, and invasion of U2 OS cells, but promoted apoptosis within these cells. Expression levels of p-AKT, p-mTOR, and p-P70S6K were reduced by exposure to THC, suggesting involvement of PI3K/AKT signaling in THC-induced cytotoxicity within OS cells. Conclusions THC may play a novel role in OS cell cytotoxicity, and these findings suggest a potent therapeutic strategy for OS treatment.
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Affiliation(s)
- Xue-Wu Xing
- 1 Department of Orthopedics, Tianjin First Central Hospital, Tianjin, P.R. China
| | - Yu-Fu Sun
- 1 Department of Orthopedics, Tianjin First Central Hospital, Tianjin, P.R. China
| | - Jun Zhao
- 2 Department of Bone and Soft Tissue Tumor, Tianjin Medical University Cancer Institute & Hospital, Tianjin, P.R. China
| | - Zi-Xiang Pan
- 1 Department of Orthopedics, Tianjin First Central Hospital, Tianjin, P.R. China
| | - Wen-Xue Jiang
- 1 Department of Orthopedics, Tianjin First Central Hospital, Tianjin, P.R. China
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Chen MF, Gong F, Zhang YY, Li C, Zhou C, Hong P, Sun S, Qian ZJ. Preventive Effect of YGDEY from Tilapia Fish Skin Gelatin Hydrolysates against Alcohol-Induced Damage in HepG2 Cells through ROS-Mediated Signaling Pathways. Nutrients 2019; 11:E392. [PMID: 30781878 PMCID: PMC6412572 DOI: 10.3390/nu11020392] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 02/08/2019] [Accepted: 02/12/2019] [Indexed: 12/18/2022] Open
Abstract
According to a previous study, YGDEY from tilapia fish skin gelatin hydrolysates has strong free radical scavenging activity. In the present study, the protective effect of YGDEY against oxidative stress induced by ethanol in HepG2 cells was investigated. First, cells were incubated with YGDEY (10, 20, 50, and 100 μM) to assess cytotoxicity, and there was no significant change in cell viability. Next, it was established that YGDEY decreased the production of reactive oxygen species (ROS). Western blot results indicated that YGDEY increased the levels of superoxide dismutase (SOD) and glutathione (GSH) and decreased the expression of gamma-glutamyltransferase (GGT) in HepG2 cells. It was then revealed that YGDEY markedly reduced the expressions of bax and cleaved-caspase-3 (c-caspase-3); inhibited phosphorylation of Akt, IκB-α, p65, and p38; and increased the level of bcl-2. Moreover, the comet assay showed that YGDEY effectively decreased the amount of ethanol-induced DNA damage. Thus, YGDEY protected HepG2 cells from alcohol-induced injury by inhibiting oxidative stress, and this may be associated with the Akt/nuclear factor-κB (NF-κB)/mitogen-activated protein kinase (MAPK) signal transduction pathways. These results demonstrate that YGDEY from tilapia fish skin gelatin hydrolysates protects HepG2 cells from oxidative stress, making it a potential functional food ingredient.
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Affiliation(s)
- Mei-Fang Chen
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China.
| | - Fang Gong
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China.
| | - Yuan Yuan Zhang
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China.
| | - Chengyong Li
- School of Chemistry and Environment, Guangdong Ocean University, Zhanjiang 524088, China.
- Shenzhen Institute of Guangdong Ocean University, Shenzhen 518114, China.
| | - Chunxia Zhou
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China.
| | - Pengzhi Hong
- College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China.
| | - Shengli Sun
- School of Chemistry and Environment, Guangdong Ocean University, Zhanjiang 524088, China.
| | - Zhong-Ji Qian
- School of Chemistry and Environment, Guangdong Ocean University, Zhanjiang 524088, China.
- Shenzhen Institute of Guangdong Ocean University, Shenzhen 518114, China.
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Wan L, Zhang D, Zhang J, Ren L. TT-1, an analog of melittin, triggers apoptosis in human thyroid cancer TT cells via regulating caspase, Bcl-2 and Bax. Oncol Lett 2018; 15:1271-1278. [PMID: 29387245 DOI: 10.3892/ol.2017.7366] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2016] [Accepted: 06/22/2017] [Indexed: 01/25/2023] Open
Abstract
Melittin is a 26 amino acid residue antimicrobial peptide with known antitumor activity. In the present study, a novel peptide TT-1, derived from melittin and contained only 11 amino acids, was designed, and its antitumor effect was investigated. The present study is aimed to elucidate the effects and relative mechanisms of TT-1 on a human thyroid cancer cell line (TT) in vitro and in vivo. Cell viability assays, Annexin V/propidium iodide assays, western blotting and quantitative reverse transcription polymerase chain reaction were performed. Furthermore, a tumor-xenograft model was established to investigate the apoptotic mechanisms of TT-1 on TT cells. The results obtained indicated that TT-1 was able to suppress the proliferation of TT cells and exhibited low cytotoxicity to normal thyroid cells in vitro. The apoptotic rates of TT cells were also increased following TT-1 treatment. Additionally, TT-1 stimulated caspase-3, caspase-9 and Bax, and inhibited B-cell lymphoma 2 mRNA and protein expression. Finally, it was also demonstrated that TT-1 is able to markedly suppress tumor growth in a TT-bearing nude mouse model. In summary, TT-1 may inhibit the proliferation of TT cells by inducing apoptosis in vitro and in vivo, indicating that TT-1 may be a potential candidate for the treatment of thyroid cancer.
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Affiliation(s)
- Lanlan Wan
- Department of Anesthesiology, The Second Hospital of Jilin University, Changchun, Jilin 130033, P.R. China.,Department of Pharmacology and Toxicology, Jilin University School of Pharmaceutical Sciences, Changchun, Jilin 130021, P.R. China
| | - Daqi Zhang
- Department of Thyroid Surgery, China-Japan Union Hospital of Jilin University, Jilin Provincial Key Laboratory of Surgical Translational Medicine, Changchun, Jilin 130033, P.R. China
| | - Jinnan Zhang
- Department of Neurosurgery, China-Japan Union Hospital of Jilin University, Changchun, Jilin 130033, P.R. China
| | - Liqun Ren
- Department of Pharmacology and Toxicology, Jilin University School of Pharmaceutical Sciences, Changchun, Jilin 130021, P.R. China
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Xu T, Cui T, Peng L, Kong S, Zou J, Tian X. The anti-hepatocellular carcinoma activity of Mel-P15 is mediated by natural killer cells. Oncol Lett 2017; 14:6901-6906. [PMID: 29163709 DOI: 10.3892/ol.2017.7018] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Accepted: 06/02/2017] [Indexed: 02/07/2023] Open
Abstract
Mel-P15 is a peptide derived from melittin, the main toxic component in the venom of the European honeybee Apis mellifera. In the present study, the antitumor effects of Mel-P15 and the underlying molecular mechanisms of these effects in vivo were investigated. Mel-P15 directly stimulated natural killer (NK) cell cytotoxicity in vitro, which was increased to 55.45% at a 4 µg/ml dose of Mel-P15. In the mouse liver cancer (H22) xenograft mice model, Mel-P15 suppressed tumor growth in vivo; the tumor inhibitory rate was 61.15% following treatment with 2 mg/kg Mel-P15. In addition, the immune response was activated following Mel-P15 treatment. Mel-P15 treatment increased the spleen and thymus indices, promoted splenocyte proliferation, stimulated NK cytotoxicity and upregulated the secretion of cytokines, including interleukin-2, interferon-γ and tumor necrosis factor-α. In addition, the tumor inhibitory effect of Mel-P15 on BEL-7402-bearing nude mice was abrogated by the selective depletion of NK cells via the intraperitoneal injection of an anti-asialo GM-1 antibody. The results suggest that Mel-P15 inhibits tumor growth in vivo by promoting NK cell cytotoxicity. Mel-P15 may therefore be a potential immunotherapy candidate for the treatment of hepatocellular carcinoma.
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Affiliation(s)
- Tao Xu
- Department of Hepatobiliary Surgery, Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
| | - Tongxing Cui
- Department of Hepatobiliary Surgery, Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
| | - Lipan Peng
- Department of Hepatobiliary Surgery, Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
| | - Shuai Kong
- Department of Hepatobiliary Surgery, Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
| | - Jianqiang Zou
- Department of Hepatobiliary Surgery, Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
| | - Xingsong Tian
- Department of Hepatobiliary Surgery, Provincial Hospital Affiliated to Shandong University, Jinan, Shandong 250021, P.R. China
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Essential oil from Siegesbeckia pubescens induces apoptosis through the mitochondrial pathway in human HepG2 cells. ACTA ACUST UNITED AC 2017; 37:87-92. [DOI: 10.1007/s11596-017-1699-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Revised: 11/09/2016] [Indexed: 12/12/2022]
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13
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Balandin SV, Emelianova AA, Kalashnikova MB, Kokryakov VN, Shamova OV, Ovchinnikova TV. Molecular mechanisms of antitumor effect of natural antimicrobial peptides. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2017. [DOI: 10.1134/s1068162016060029] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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