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Jung O, Jung HY, Thuy LT, Choi M, Kim S, Jeon HG, Yang J, Kim SM, Kim TD, Lee E, Kim Y, Choi JS. Modulating Lipid Nanoparticles with Histidinamide-Conjugated Cholesterol for Improved Intracellular Delivery of mRNA. Adv Healthc Mater 2024:e2303857. [PMID: 38344923 DOI: 10.1002/adhm.202303857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Revised: 02/07/2024] [Indexed: 02/22/2024]
Abstract
Recently, mRNA-based therapeutics, including vaccines, have gained significant attention in the field of gene therapy for treating various diseases. Among the various mRNA delivery vehicles, lipid nanoparticles (LNPs) have emerged as promising vehicles for packaging and delivering mRNA with low immunogenicity. However, while mRNA delivery has several advantages, the delivery efficiency and stability of LNPs remain challenging for mRNA therapy. In this study, an ionizable helper cholesterol analog, 3β[L-histidinamide-carbamoyl] cholesterol (Hchol) lipid is developed and incorporated into LNPs instead of cholesterol to enhance the LNP potency. The pKa values of the Hchol-LNPs are ≈6.03 and 6.61 in MC3- and SM102-based lipid formulations. Notably, the Hchol-LNPs significantly improve the delivery efficiency by enhancing the endosomal escape of mRNA. Additionally, the Hchol-LNPs are more effective in a red blood cell hemolysis at pH 5.5, indicating a synergistic effect of the protonated imidazole groups of Hchol and cholesterol on endosomal membrane destabilization. Furthermore, mRNA delivery is substantially enhanced in mice treated with Hchol-LNPs. Importantly, LNP-encapsulated SARS-CoV-2 spike mRNA vaccinations induce potent antigen-specific antibodies against SARS-CoV-2. Overall, incorporating Hchol into LNP formulations enables efficient endosomal escape and stability, leading to an mRNA delivery vehicle with a higher delivery efficiency.
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Affiliation(s)
- Onesun Jung
- Department of Biochemistry, College of Natural Sciences, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Hye-Youn Jung
- Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Republic of Korea
| | - Le Thi Thuy
- Department of Biochemistry, College of Natural Sciences, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Minyoung Choi
- Department of Biochemistry, College of Natural Sciences, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Seongyeon Kim
- Department of Biochemistry, College of Natural Sciences, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Hae-Geun Jeon
- Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Republic of Korea
| | - Jihyun Yang
- Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Republic of Korea
| | - Seok-Min Kim
- Immunotherapy Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Republic of Korea
| | - Tae-Don Kim
- Immunotherapy Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Republic of Korea
- Bioscience Major, KRIBB School, Korea University of Science and Technology (UST), Daejeon, 34113, Republic of Korea
| | - Eunjung Lee
- Department of Biochemistry, College of Natural Sciences, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Yoonkyung Kim
- Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Republic of Korea
- Bioscience Major, KRIBB School, Korea University of Science and Technology (UST), Daejeon, 34113, Republic of Korea
| | - Joon Sig Choi
- Department of Biochemistry, College of Natural Sciences, Chungnam National University, Daejeon, 34134, Republic of Korea
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Kim S, Thuy LT, Lee J, Choi JS. Second-Generation Polyamidoamine Dendrimer Conjugated with Oligopeptides Can Enhance Plasmid DNA Delivery In Vitro. Molecules 2023; 28:7644. [PMID: 38005366 PMCID: PMC10674462 DOI: 10.3390/molecules28227644] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 11/10/2023] [Accepted: 11/15/2023] [Indexed: 11/26/2023] Open
Abstract
Poly(amidoamine) (PAMAM) dendrimers have attracted considerable attention in the field of gene therapy due to their flexibility in introducing different functional moieties and reduced toxicity at low generations. However, their transfection efficiency remains a limitation. Therefore, an essential approach for improving their transfection efficiency as gene carriers involves modifying the structure of PAMAM by conjugating functional groups around their surface. In this study, we successfully conjugated an RRHRH oligopeptide to the surface of PAMAM generation 2 (PAMAM G2) to create RRHRH-PAMAM G2. This construction aims to condense plasmid DNA (pDNA) and facilitate its penetration into cell membranes, leading to its promising potential for gene therapy. RRHRH-PAMAM G2/pDNA complexes were smaller than 100 nm and positively charged. Nano-polyplexes can enter the cell and show a high transfection efficiency after 24 h of transfection. The RRHRH-PAMAM G2 was non-toxic to HeLa, NIH3T3, A549, and MDA-MB-231 cell lines. These results strongly suggest that RRHRH-PAMAM G2 holds promise as a gene carrier for gene therapy owing to its biocompatibility and ability to deliver genes to the cell.
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Affiliation(s)
| | | | | | - Joon Sig Choi
- Department of Biochemistry, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea; (S.K.); (L.T.T.); (J.L.)
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3
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Thuy LT, Kim SY, Dongquoc V, Kim Y, Choi JS, Cho WK. Coordination-driven robust antibacterial coatings using catechol-conjugated carboxymethyl chitosan. Int J Biol Macromol 2023; 249:126090. [PMID: 37541478 DOI: 10.1016/j.ijbiomac.2023.126090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 07/21/2023] [Accepted: 07/31/2023] [Indexed: 08/06/2023]
Abstract
To prevent bacterial contamination on solid surfaces, a simple yet efficient antibacterial coating was developed in a substrate-independent manner by using the catechol-conjugated carboxymethyl chitosan (CMC-DOPA). The CMC-DOPA was firstly synthesized via an aza-Michael reaction with methyl acrylate and the subsequent acyl substitution with dopamine. The coating strategy consists of spin-coating-assisted deposition of CMC-DOPA on polydopamine-coated substrates and coordination-driven crosslinks between catechol groups and Fe3+ ions in sequence, producing the multilayered CMC-DOPA films. The film thickness was controllable depending on the concentration of CMC-DOPA. Compared to bare controls, the CMC-DOPA-coated substrates reduced the bacterial adhesion by up to 99.8 % and 96.2 % for E. coli and S. aureus, respectively. It is demonstrated that the CMC-DOPA coating can be a robust antibacterial coating across various pH environments, inhibiting bacterial adhesion by 78.7 %, 95.1 %, and 93.2 %, respectively, compared to the control, even after 7 days of acidic, physiological, and alkaline pH treatment. The current coating approach could be applied to various substrates including silicon dioxide, titanium dioxide, and polyurethane. Given its simple and versatile coating capability, we think that the coordination-driven CMC-DOPA coating could be useful for various medical devices and implants.
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Affiliation(s)
- Le Thi Thuy
- Department of Biochemistry, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Su Youn Kim
- Department of Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Viet Dongquoc
- Department of Materials Science and Engineering, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Younjin Kim
- Department of Biochemistry, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Joon Sig Choi
- Department of Biochemistry, Chungnam National University, Daejeon 34134, Republic of Korea.
| | - Woo Kyung Cho
- Department of Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea.
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Dinh TPA, Thuy LT, Thuy My NT, Nguyen VT, Tram LH, Nguyen TA, Toan DH, Tran TH, Tran TH, Bui Van T, Van Bach N. Phenyl glycosides from Bacopa monnieri with their antioxidant and anti-inflammatory activities. Nat Prod Res 2023:1-6. [PMID: 37732634 DOI: 10.1080/14786419.2023.2258544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 09/08/2023] [Indexed: 09/22/2023]
Abstract
Bacopa monnieri (L.) Wettst (Plantaginaceae), is traditionally used in many countries as neural tonic and memory enhancer, or to relieve acute pain and inflammation. This study described the isolation and identification of one new, bacomoside D3 (1), and seven known phenyl glycosides (2 - 8). The structures of isolates were established by analysis of their spectroscopic data or hydrolysis followed by HPLC analysis together with a comparison to those reported in the literature. These compounds were evaluated for antioxidant and anti-inflammatory activities. Among them, compounds 4 and 5 exhibited strong DPPH radical scavenging activity with IC50 values of 9.77 ± 0.08 and 3.50 ± 0.04 µM, respectively. Compounds 2 and 5 significantly inhibited TNF-α production in LPS-stimulated RAW264.7 cells with IC50 values of 40.60 ± 3.05 and 38.19 ± 1.75 µM, respectively. Furthermore, the active compounds could be efficient inhibitors of oxidants by interfering with the DPPH activity in silico study.
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Affiliation(s)
- Thi Phuong Anh Dinh
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Le Thi Thuy
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Nguyen Thi Thuy My
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Van Thong Nguyen
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Le Huyen Tram
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Tuan Anh Nguyen
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Dao Huy Toan
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Thu Huong Tran
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Thu Ha Tran
- Intellectual Property Office of Vietnam, Hanoi, Vietnam
| | - Thanh Bui Van
- Institute of Ecology and Biological Resources (IEBR), Vietnam Academy of Science and Technology (VAST), Caugiay, Vietnam
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Thuy LT, Tram LH, Anh DTP, My NTT, Thong NV, Anh NT, Toan DH, Ha TT, Thanh BV, Mai NTN, Linh NN, Le DD, Huong TT, Bach NV. New Dibenzocyclooctadiene Lignans and Phenolics from Kadsura heteroclite with Anti-Inflammatory Activity. Chem Biodivers 2023; 20:e202300904. [PMID: 37550247 DOI: 10.1002/cbdv.202300904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 08/03/2023] [Accepted: 08/07/2023] [Indexed: 08/09/2023]
Abstract
A chemical investigation of K. heteroclite led to isolation of two new dibenzocyclooctadienes (1 and 2) together with 14 known compounds (3-16) by using multiple chromatographic techniques. New compounds (1 and 2) were obtained and identified by spectroscopic methods (HR-ESI-MS, 1D and 2D NMR, and ECD) as well as by comparison of their experimental data with those reported in the literatures. All the isolates were evaluated for their ability to modulate TNF-α production in lipopolysaccharide (LPS) stimulated RAW264.7 cells. Among them, compound 5 displayed the most inhibition against tumor necrosis factor (TNF)-α production with IC50 value of 6.16±0.14 μM. Whereas, compounds (1, 3, and 6) showed the significant inhibition (IC50 values ranging from 9.41 to 14.54 μM), and compounds (2, 4, 9, 10, 13, 15, and 16) exhibited moderate inhibition (IC50 values ranging from 19.27 to 40.64 μM) toward TNF-α production, respectively.
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Affiliation(s)
- Le Thi Thuy
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, 100000, Vietnam
| | - Le Huyen Tram
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, 100000, Vietnam
| | - Dinh Thi Phuong Anh
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, 100000, Vietnam
| | - Nguyen Thi Thuy My
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, 100000, Vietnam
| | - Nguyen Van Thong
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, 100000, Vietnam
| | - Nguyen Tuan Anh
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, 100000, Vietnam
| | - Dao Huy Toan
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, 100000, Vietnam
| | - Tran Thu Ha
- Intellectual Property Office of Vietnam, Hanoi, 100000, Vietnam
| | - Bui Van Thanh
- Institute of Ecology and Biological Resources (IEBR), Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Caugiay, Hanoi, 100000, Vietnam
| | - Nguyen Thi Ngoc Mai
- College of Pharmacy, Thanh Do University, Kim Chung, Hoai Duc, Hanoi, 10000, Vietnam
| | - Nguyen Ngoc Linh
- College of Pharmacy, Thanh Do University, Kim Chung, Hoai Duc, Hanoi, 10000, Vietnam
| | - Duc-Dat Le
- College of Pharmacy, Thanh Do University, Kim Chung, Hoai Duc, Hanoi, 10000, Vietnam
| | - Tran Thu Huong
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, 100000, Vietnam
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Kang N, Thuy LT, Dongquoc V, Choi JS. Conjugation of Short Oligopeptides to a Second-Generation Polyamidoamine Dendrimer Shows Antibacterial Activity. Pharmaceutics 2023; 15:pharmaceutics15031005. [PMID: 36986864 PMCID: PMC10053621 DOI: 10.3390/pharmaceutics15031005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 03/15/2023] [Accepted: 03/19/2023] [Indexed: 03/30/2023] Open
Abstract
The growing evolution of bacterial resistance to antibiotics represents a global issue that not only impacts healthcare systems but also political and economic processes. This necessitates the development of novel antibacterial agents. Antimicrobial peptides have shown promise in this regard. Thus, in this study, a new functional polymer was synthesized by joining a short oligopeptide sequence (Phe-Lys-Phe-Leu, FKFL) to the surface of a second-generation polyamidoamine (G2 PAMAM) dendrimer as an antibacterial component. This method of synthesis proved simple and resulted in a high conjugation yield of the product FKFL-G2. To determine its antibacterial potential, FKFL-G2 was subsequently analyzed via mass spectrometry, a cytotoxicity assay, bacterial growth assay, colony-forming unit assay, membrane permeabilization assay, transmission electron microscopy, and biofilm formation assay. FKFL-G2 was found to exhibit low toxicity to noncancerous NIH3T3 cells. Additionally, FKFL-G2 had an antibacterial effect on Escherichia coli and Staphylococcus aureus strains by interacting with and disrupting the bacterial cell membrane. Based on these findings, FKFL-G2 shows promise as a potential antibacterial agent.
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Affiliation(s)
- Namyoung Kang
- Department of Biochemistry, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea
| | - Le Thi Thuy
- Department of Biochemistry, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea
| | - Viet Dongquoc
- Department of Materials Science and Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea
| | - Joon Sig Choi
- Department of Biochemistry, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea
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Thuy LT, Lee S, Dongquoc V, Choi JS. Nanoemulsion Composed of α-Tocopherol Succinate and Dequalinium Shows Mitochondria-Targeting and Anticancer Effects. Antioxidants (Basel) 2023; 12:antiox12020437. [PMID: 36829996 PMCID: PMC9952168 DOI: 10.3390/antiox12020437] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 02/06/2023] [Accepted: 02/08/2023] [Indexed: 02/12/2023] Open
Abstract
Targeted drugs have been used to treat mitochondrial dysfunction-related diseases, including metabolic disorders and cancer; however, targeting and penetrating intracellular organelles remains a challenge. Dominant targeting approaches for therapeutic delivery are detailed in many nanoemulsion studies and show the tremendous potential of targeted delivery to inhibit cancer cell growth. Dequalinium (DQA) and α-tocopherol succinate (α-TOS) are good agents for targeting mitochondria. In this study, we aimed to develop a mitochondria-targeting emulsion, using DQA and α-TOS (DTOS), for cancer treatment. DTOS emulsions of 150-170 nm in diameter were formulated using homogenization. DQA and α-TOS were used as bifunctional agents (surfactants) to stabilize the nanoemulsion and anticancer drugs. Various molar ratios of DQA and α-TOS were tested to determine the optimal condition, and DTOS 5-5 was selected for further study. The DTOS emulsion showed improved stability, as evidenced by its ability to remain stable for three years at room temperature. This stability, combined with its effective targeting of mitochondria, led to inhibition of 71.5% of HeLa cells after 24 h. The DTOS emulsion effectively inhibited spheroid growth in the 3D model, as well as prevented the growth of HeLa cells grafted onto zebrafish larvae. These results highlight the DTOS emulsion's promising potential for mitochondria-targeting and cancer treatment.
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Affiliation(s)
- Le Thi Thuy
- Department of Biochemistry, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea
| | - Seulgi Lee
- KM Science Research Division, Korea Institute of Oriental Medicine, Yuseong-daero 1672, Yuseong-gu, Daejeon 34054, Republic of Korea
| | - Viet Dongquoc
- Department of Materials Science and Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea
| | - Joon Sig Choi
- Department of Biochemistry, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea
- Correspondence: ; Tel.: +82-42-821-7528; Fax: +82-42-822-7548
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Ki SH, Thuy LT, Kim S, Lee S, Choi JS, Cho WK. Curcumin-Based Universal Grafting of Poly(OEGMA) Brushes and Their Antibacterial Applications. Macromol Biosci 2022; 22:e2200310. [PMID: 36074994 DOI: 10.1002/mabi.202200310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 09/06/2022] [Indexed: 12/25/2022]
Abstract
Catechol and/or pyrogallol groups are recognized as crucial for the formation of polyphenol coatings on various substrates. Meanwhile, studies on polyphenolic molecules that do not contain such groups are relatively rare. The key molecule in turmeric-based universal (i.e., substrate-independent) coatings is curcumin, which contains no catechol or pyrogallol groups. As chemically reactive hydroxyl groups would remain after curcumin coating, it is hypothesized that curcumin coating can serve as a reactive layer for controlling interfacial properties. In this study, a curcumin-based surface modification method is developed to graft polymer brushes from various substrates, including titanium dioxide, gold, glass, stainless steel, and nylon. α-Bromoisobutyryl bromide, a polymerization initiator, is introduced to the curcumin-coated substrates via esterification; subsequently, poly(oligo(ethylene glycol) methacrylate) (poly(OEGMA)) is grafted from the surfaces. Compared to the control surfaces, poly(OEGMA)-grafted surfaces significantly suppress bacterial adhesion by up to 99.4%, demonstrating their antibacterial properties. Considering its facile and versatile surface modification, curcumin-based polymer grafting can be an efficient method for controlling the chemical/physical properties of surfaces in a substrate-independent manner.
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Affiliation(s)
- So Hyun Ki
- Department of Chemistry, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Le Thi Thuy
- Department of Biochemistry, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Sunhee Kim
- Department of Chemistry, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Seulgi Lee
- KM Science Research Division, Korea Institute of Oriental Medicine, Daejeon, 34054, Republic of Korea
| | - Joon Sig Choi
- Department of Biochemistry, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Woo Kyung Cho
- Department of Chemistry, Chungnam National University, Daejeon, 34134, Republic of Korea
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Thuy LT, Kang N, Choi M, Lee M, Choi JS. Dendrimeric micelles composed of polyamidoamine dendrimer-peptide-cholesterol conjugates as drug carriers for the treatment of melanoma and bacterial infection. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.07.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Thuy LT, Choi M, Lee M, Choi JS. Preparation and characterization of polyamidoamine dendrimers conjugated with cholesteryl-dipeptide as gene carriers in HeLa cells. J Biomater Sci Polym Ed 2022; 33:976-994. [PMID: 35038285 DOI: 10.1080/09205063.2022.2030657] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Improving the transfection efficiency of non-viral carriers by using cationic polymers is a useful approach to addressing several challenges in gene therapy, such as cellular uptake, endosomal escape, and toxicity. Among the various cationic polymers, polyamidoamine (PAMAM) dendrimers have been widely utilized because of the abundance of terminal functional groups, thereby enabling further functionalization and enhancing DNA condensation and internalization into cells. The combination of various functional groups is required for these PAMAM dendrimer derivatives to function appropriately for gene delivery. Herein, we synthesized PAMAM G2-HRChol by conjugating dipeptide (histidine-arginine) and cholesterol at different ratios (6% or 23%) on the surface of PAMAM dendrimer generation 2 (PAMAM G2). Both PAMAM G2-HRChol 6% and PAMAM G2-HRChol 23% have buffering capacity, leading to improved endosomal escape after entering the cells. PAMAM G2-HRChol 6% and PAMAM G2-HRChol 23% dendrimers were condensed with pDNA to form nano-polyplexes at a weight ratio of 4 (polymer/pDNA). Polyplexes are positively charged, which facilitates cellular uptake. The transfection efficiency of PAMAM G2-HRChol 6% and PAMAM G2-HRChol 23% dendrimers was similar to that of PEI 25 kDa under optimum conditions, and the cytotoxicity was much lower than that of PEI 25 kDa in HeLa cells. In addition, after apoptin gene transfection was performed, cell death ratios of 34.47% and 22.47% were observed for PAMAM G2-HRChol 6% and PAMAM G2-HRChol 23%, respectively. The results show that a suitable amount of cholesterol can improve gene transfection efficiency, and the PAMAM G2-HRChol 6% dendrimer could be a potential gene carrier in HeLa cells.
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Affiliation(s)
- Le Thi Thuy
- Department of Biochemistry, Chungnam National University, Daejeon, Republic of Korea
| | - Minyoung Choi
- Department of Biochemistry, Chungnam National University, Daejeon, Republic of Korea
| | - Minhyung Lee
- Department of Bioengineering, College of Engineering, Hanyang University, Seoul, Republic of Korea
| | - Joon Sig Choi
- Department of Biochemistry, Chungnam National University, Daejeon, Republic of Korea
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Kim Y, Thuy LT, Kim Y, Seong M, Cho WK, Choi JS, Kang SM. Coordination-Driven Surface Zwitteration for Antibacterial and Antifog Applications. Langmuir 2022; 38:1550-1559. [PMID: 35057617 DOI: 10.1021/acs.langmuir.1c03009] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The enhancement of surface wettability by hydrophilic polymer coatings has been of great interest because it has been used to address several technical challenges such as biofouling and surface fogging. Among the hydrophilic polymers, zwitterionic polymers have been extensively utilized to coat solid surfaces due to their excellent capability to bind water molecules, thereby forming dense hydration layers on the solid surfaces. For these zwitterionic polymers to function appropriately on the solid surfaces, techniques for fixing polymers onto the solid surface with high efficiency are required. Herein, we report a new approach to graft zwitterionic polymers onto solid substrates. The approach is based on the mussel-inspired surface chemistry and metal coordination. It consists of polydopamine coating and the coordination-driven grafting of the zwitterionic polymers. Polydopamine coating enables the versatile surface immobilization of catechols. Zwitterionic polymers are then easily fixed onto the catechol-immobilized surface by metal-mediated crosslinking reactions. Using this approach, nanometer-thick zwitterionic polymer layers that are highly resistant to bacterial adhesion and fog generation could be successfully fabricated on solid substrates in a substrate-independent manner.
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Affiliation(s)
- Yohan Kim
- Department of Chemistry, Chungbuk National University, Cheongju, Chungbuk 28644, Republic of Korea
| | - Le Thi Thuy
- Department of Biochemistry, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Yejin Kim
- Department of Chemistry, Chungbuk National University, Cheongju, Chungbuk 28644, Republic of Korea
| | - Minjin Seong
- Department of Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Woo Kyung Cho
- Department of Chemistry, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Joon Sig Choi
- Department of Biochemistry, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Sung Min Kang
- Department of Chemistry, Chungbuk National University, Cheongju, Chungbuk 28644, Republic of Korea
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Thanh TT, Nhan NTT, Anh NT, Chung LT, Duyen PTT, Chi LTK, Thu NTH, Hieu PT, Van Phuc D, Son PV, Anh DQ, Nam PT, Thuc NT, Hanh NT, Thuy LT, Tram LLT, Thanh LK, Ny NTH, Nhu LNT, Chau NVV, Thwaites G, Thanh TT, Van Tan L. SARS-CoV-2 RNA loads in Vietnamese children. J Infect 2022; 84:579-613. [PMID: 35033580 PMCID: PMC8757648 DOI: 10.1016/j.jinf.2022.01.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Accepted: 01/08/2022] [Indexed: 11/03/2022]
Affiliation(s)
| | | | - Nguyen To Anh
- Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam
| | | | | | | | | | | | | | | | | | - Pham Thi Nam
- Center for Disease Control, Da Nang City, Vietnam
| | | | - Nguyen Thi Hanh
- University of Medical Technology and Pharmacy, Da Nang City, Vietnam
| | - Le Thi Thuy
- University of Medical Technology and Pharmacy, Da Nang City, Vietnam
| | | | - Le Kim Thanh
- Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam
| | | | | | - Nguyen Van Vinh Chau
- Hospital for Tropical Diseases, Ho Chi Minh City, Vietnam; Department of Health, Ho Chi Minh City, Vietnam
| | - Guy Thwaites
- Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam; Centre for Tropical Medicine, Nuffield Department of Medicine, University of Oxford, UK
| | - Tran Tan Thanh
- Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam
| | - Le Van Tan
- Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam.
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13
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Giang VH, Thuy LT, Hanh TTH, Cuong NX, Vinh LB, Ban NK, Linh TM, Mai NC, Huong TT, Dang NH, Oh H, Lee DS, Quang TH. Cytotoxic and nitric oxide inhibitory activities of triterpenoids from Lycopodium clavatum L. Nat Prod Res 2022; 36:6232-6239. [PMID: 34989301 DOI: 10.1080/14786419.2021.2024824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Using combined chromatographic separation techniques, three new triterpenoids named lycomclavatols A-C (1-3), a new natural product, methyl lycernuate-A (4), as well as seven known compounds (5-11), were isolated from the methanol extract of the whole plants of Lycopodium clavatum. Their chemical structures were established based on 1 D/2D NMR and HR-ESI-MS spectroscopic analyses. Among the isolates, compound 1 exhibited inhibitory activity on NO production in LPS-stimulated BV2 cells (IC50 = 36.0 μM). In addition, 1 was cytotoxic against both HepG2 and A549 cancer cell lines, with IC50 values of 40.7 and 87.0 μM, respectively. Compounds 10 and 11 showed cytotoxicity on only HepG2 and A549 cells, with IC50 values of 91.2 and 57.6 μM, respectively. Our results contribute to understanding more the secondary metabolites produced by L. clavatum and provide a scientific rationale for further investigations of anti-inflammatory and anticancer effects for this valuable medicinal plant.
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Affiliation(s)
- Vu Huong Giang
- Institute of Marine Biochemistry (IMBC), Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Le Thi Thuy
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Tran Thi Hong Hanh
- Institute of Marine Biochemistry (IMBC), Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Nguyen Xuan Cuong
- Institute of Marine Biochemistry (IMBC), Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Le Ba Vinh
- Institute of Marine Biochemistry (IMBC), Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam.,College of Pharmacy, Wonkwang University, Iksan, Republic of Korea
| | - Ninh Khac Ban
- Institute of Marine Biochemistry (IMBC), Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Tran My Linh
- Institute of Marine Biochemistry (IMBC), Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Nguyen Chi Mai
- Institute of Marine Biochemistry (IMBC), Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Tran Thu Huong
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Nguyen Hai Dang
- University of Science and Technology of Hanoi, VAST, Hanoi, Vietnam
| | - Hyuncheol Oh
- College of Pharmacy, Wonkwang University, Iksan, Republic of Korea
| | - Dong-Sung Lee
- College of Pharmacy, Chosun University, Gwangju, Republic of Korea
| | - Tran Hong Quang
- Institute of Marine Biochemistry (IMBC), Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
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14
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Tram LH, Van Thong N, Thuy LT, Anh NT, Minh NH, Minh TT, Thi Hong Phuong N, Ha TT, Nguyet Nguyen TM, Le DD, Hiep ND, Park JT, Thi To Chinh T, Thu Huong T, Lee M. Secondary metabolites from Valeriana jatamansi with their anti-inflammatory activity. Nat Prod Res 2021; 36:4620-4629. [PMID: 34812687 DOI: 10.1080/14786419.2021.2004600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Valeriana jatamansi is hired as multiple remedies for treatment of insomnia, blood and circulatory disorders, asthma, dry cough, jaundice, seminal weakness, cardiac debility, and skin diseases in Vietnam. Our research discovered the phytochemical investigation of constituents from this herbal medicine resulted in the isolation of two new compounds (jatamansides A (4) and B (7)) together with 16 known ones from the whole plant. Their structures were established by using spectroscopic techniques (multinuclear and multidimensional nuclear magnetic resonance, infrared, ultraviolet-visible), mass spectrometry, hydrolysis analysis, or comparing their NMR data to those reported in the literature. In addition, all the isolates were evaluated for their inhibitory effect against TNF-α production in LPS-stimulated on RAW264.7 cells with significant inhibition.
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Affiliation(s)
- Le Huyen Tram
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Nguyen Van Thong
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Le Thi Thuy
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Nguyen Tuan Anh
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Nguyen Hoang Minh
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Tran Thi Minh
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Nguyen Thi Hong Phuong
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Tran Thu Ha
- Intellectual Property Office of Vietnam, Hanoi, Vietnam
| | | | - Duc Dat Le
- Division of Computational Physics, Institute for Computational Science, Ton Duc Thang University, Ho Chi Minh City, Vietnam.,Faculty of Pharmacy, Ton Duc Thang University, Ho Chi Minh City, Vietnam
| | - Nguyen Dinh Hiep
- Faculty of Pharmacy, Ton Duc Thang University, Ho Chi Minh City, Vietnam
| | - Jong-Tae Park
- Department of Food Science and technology, Chungnam National University, Daejeon, Republic of Korea
| | | | - Tran Thu Huong
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Mina Lee
- College of Pharmacy and Research Institute of Life and Pharmaceutical Sciences, Sunchon National University, Suncheon-si, Korea
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15
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Choi M, Thuy LT, Lee Y, Piao C, Choi JS, Lee M. Dual-Functional Dendrimer Micelles with Glycyrrhizic Acid for Anti-Inflammatory Therapy of Acute Lung Injury. ACS Appl Mater Interfaces 2021; 13:47313-47326. [PMID: 34581558 DOI: 10.1021/acsami.1c08107] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Dendrimer micelles with glycyrrhizic acid (GA) were developed for anti-inflammatory therapy of acute lung injury (ALI). Cholesterol was conjugated to histidine- and arginine-grafted polyamidoamine (PamHR) for micelle formation. The cholesterol-conjugated PamHR (PamHRchol) was mixed with amphiphilic GA to produce PamHRchol/GA mixed micelles. The GA integrated into the micelles had two functions: it acted as an anti-inflammatory drug and facilitated intracellular gene delivery. The PamHRchol/GA micelles formed stable complexes with plasmid DNA. Integrating GA into the micelles increased their transfection efficiency. Confocal microscopy and flow-cytometry studies confirmed that the PamHRchol/GA micelles improved cellular uptake compared with PamHRchol. A competition assay with free GA suggested that the enhanced transfection efficiency of the micelles might be due to the interaction between GA and its receptor. In addition, GA has a membrane-destabilizing effect, and a chloroquine pretreatment assay confirmed that GA increased endosomal escape. Furthermore, the PamHRchol/GA micelles reduced tumor necrosis factor-α in lipopolysaccharide-activated Raw264.7 cells, suggesting a mechanism for its anti-inflammatory effects. To evaluate the therapeutic potential of the PamHRchol/GA micelles, the heme oxygenase-1 (HO-1) gene was delivered into the lungs of mice with ALI. The PamHRchol/GA micelles had higher gene delivery efficiency into the lungs than polyethylenimine (25 kDa, PEI25k) and the PamHRchol micelles. The combined effects of the HO-1 gene and GA produced effective anti-inflammation response in the lungs of the ALI animals. Therefore, the dual-function PamHRchol/GA micelles, which acted as an anti-inflammatory drug and a gene carrier, could be a useful therapy for inflammatory lung diseases.
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Affiliation(s)
- Myoungjee Choi
- Department of Bioengineering, College of Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Le Thi Thuy
- Department of Biochemistry, College of Natural Sciences, Chungnam National University, Daejeon 34137, Republic of Korea
| | - Youngki Lee
- Department of Bioengineering, College of Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Chunxian Piao
- Department of Bioengineering, College of Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Joon Sig Choi
- Department of Biochemistry, College of Natural Sciences, Chungnam National University, Daejeon 34137, Republic of Korea
| | - Minhyung Lee
- Department of Bioengineering, College of Engineering, Hanyang University, Seoul 04763, Republic of Korea
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16
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Giang VH, Thuy LT, Cham PT, Vinh LB, Ban NK, Linh TM, Mai NC, Hoe PT, Huong TT, Dang NH, Oh H, Quang TH. Chemical constituents from Lycopodiella cernua and their anti-inflammatory and cytotoxic activities. Nat Prod Res 2021; 36:4045-4051. [PMID: 34498971 DOI: 10.1080/14786419.2021.1958807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Phytochemical investigation of the whole plants of Lycopodiella cernua resulted in the isolation and identification of three new compounds (1-3), namely lycocernuaside E (1), lycernuic ketone F (2), and lycernuic B (3) and 12 known ones (4-15). Their chemical structures were established based on 1 D/2D NMR spectroscopic and HR-ESI-MS data analyses. Compounds 5, 12, and 13 displayed NO inhibitory effects in LPS-stimulated BV2 cells, with IC50 values of 21.2 ± 1.1, 28.5 ± 1.4, and 21.9 ± 1.1 µM, respectively. In addition, cytotoxic activity of the isolated compounds against MCF7 (breast carcinoma), HepG2 (hepatocarcinoma), and SK-Mel2 (melanoma) cancer cell lines were also reported.
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Affiliation(s)
- Vu Huong Giang
- Institute of Marine Biochemistry (IMBC), Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Le Thi Thuy
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Pham Thi Cham
- Institute of Marine Biochemistry (IMBC), Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Le Ba Vinh
- Institute of Marine Biochemistry (IMBC), Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam.,College of Pharmacy, Wonkwang University, Iksan, Republic of Korea
| | - Ninh Khac Ban
- Institute of Marine Biochemistry (IMBC), Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Tran My Linh
- Institute of Marine Biochemistry (IMBC), Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Nguyen Chi Mai
- Institute of Marine Biochemistry (IMBC), Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Pham Thi Hoe
- Institute of Marine Biochemistry (IMBC), Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Tran Thu Huong
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Nguyen Hai Dang
- University of Science and Technology of Hanoi, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Hyuncheol Oh
- College of Pharmacy, Wonkwang University, Iksan, Republic of Korea
| | - Tran Hong Quang
- Institute of Marine Biochemistry (IMBC), Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
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17
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Wang MS, Zhang JJ, Guo X, Li M, Meyer R, Ashari H, Zheng ZQ, Wang S, Peng MS, Jiang Y, Thakur M, Suwannapoom C, Esmailizadeh A, Hirimuthugoda NY, Zein MSA, Kusza S, Kharrati-Koopaee H, Zeng L, Wang YM, Yin TT, Yang MM, Li ML, Lu XM, Lasagna E, Ceccobelli S, Gunwardana HGTN, Senasig TM, Feng SH, Zhang H, Bhuiyan AKFH, Khan MS, Silva GLLP, Thuy LT, Mwai OA, Ibrahim MNM, Zhang G, Qu KX, Hanotte O, Shapiro B, Bosse M, Wu DD, Han JL, Zhang YP. Large-scale genomic analysis reveals the genetic cost of chicken domestication. BMC Biol 2021; 19:118. [PMID: 34130700 PMCID: PMC8207802 DOI: 10.1186/s12915-021-01052-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Accepted: 05/19/2021] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND Species domestication is generally characterized by the exploitation of high-impact mutations through processes that involve complex shifting demographics of domesticated species. These include not only inbreeding and artificial selection that may lead to the emergence of evolutionary bottlenecks, but also post-divergence gene flow and introgression. Although domestication potentially affects the occurrence of both desired and undesired mutations, the way wild relatives of domesticated species evolve and how expensive the genetic cost underlying domestication is remain poorly understood. Here, we investigated the demographic history and genetic load of chicken domestication. RESULTS We analyzed a dataset comprising over 800 whole genomes from both indigenous chickens and wild jungle fowls. We show that despite having a higher genetic diversity than their wild counterparts (average π, 0.00326 vs. 0.00316), the red jungle fowls, the present-day domestic chickens experienced a dramatic population size decline during their early domestication. Our analyses suggest that the concomitant bottleneck induced 2.95% more deleterious mutations across chicken genomes compared with red jungle fowls, supporting the "cost of domestication" hypothesis. Particularly, we find that 62.4% of deleterious SNPs in domestic chickens are maintained in heterozygous states and masked as recessive alleles, challenging the power of modern breeding programs to effectively eliminate these genetic loads. Finally, we suggest that positive selection decreases the incidence but increases the frequency of deleterious SNPs in domestic chicken genomes. CONCLUSION This study reveals a new landscape of demographic history and genomic changes associated with chicken domestication and provides insight into the evolutionary genomic profiles of domesticated animals managed under modern human selection.
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Affiliation(s)
- Ming-Shan Wang
- State Key Laboratory of Genetic Resources and Evolution, Yunnan Laboratory of Molecular Biology of Domestic Animals, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China.,Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, 650204, China.,Howard Hughes Medical Institute, University of California Santa Cruz, Santa Cruz, CA, 95064, USA.,Department of Ecology and Evolutionary Biology, University of California Santa Cruz, Santa Cruz, CA, 95064, USA
| | - Jin-Jin Zhang
- State Key Laboratory of Genetic Resources and Evolution, Yunnan Laboratory of Molecular Biology of Domestic Animals, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China.,Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, 650204, China
| | - Xing Guo
- College of Animal Science and Technology, Anhui Agricultural University, Hefei, 230036, China
| | - Ming Li
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, 712100, China
| | - Rachel Meyer
- Department of Ecology and Evolutionary Biology, University of California Santa Cruz, Santa Cruz, CA, 95064, USA
| | - Hidayat Ashari
- Museum Zoologicum Bogoriense, Research Center for Biology, Indonesian Institute of Science (LIPI), Cibinong, Bogor, 16911, Indonesia.,CAAS-ILRI Joint Laboratory on Livestock and Forage Genetic Resources, Institute of Animal Science, Chinese Academy of Agricultural Sciences (CAAS), Beijing, 100193, China
| | - Zhu-Qing Zheng
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, The Cooperative Innovation Center for Sustainable Pig Production, Ministry of Education, Huazhong Agricultural University, Wuhan, 430070, China
| | - Sheng Wang
- State Key Laboratory of Genetic Resources and Evolution, Yunnan Laboratory of Molecular Biology of Domestic Animals, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China.,Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, 650204, China
| | - Min-Sheng Peng
- State Key Laboratory of Genetic Resources and Evolution, Yunnan Laboratory of Molecular Biology of Domestic Animals, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China.,Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, 650204, China
| | - Yu Jiang
- Key Laboratory of Animal Genetics, Breeding and Reproduction of Shaanxi Province, College of Animal Science and Technology, Northwest A&F University, Yangling, 712100, China
| | - Mukesh Thakur
- State Key Laboratory of Genetic Resources and Evolution, Yunnan Laboratory of Molecular Biology of Domestic Animals, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China.,Zoological Survey of India, New Alipore, Kolkata, West Bengal, 700053, India
| | - Chatmongkon Suwannapoom
- School of Agriculture and Natural Resources, University of Phayao, Phayao, 56000, Thailand.,Unit of Excellence on Biodiversity and Natural Resources Management, University of Phayao, Phayao, 56000, Thailand
| | - Ali Esmailizadeh
- State Key Laboratory of Genetic Resources and Evolution, Yunnan Laboratory of Molecular Biology of Domestic Animals, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China.,Department of Animal Science, Shahid Bahonar University of Kerman, P.O. Box 76169133, Kerman, Iran
| | - Nalini Yasoda Hirimuthugoda
- State Key Laboratory of Genetic Resources and Evolution, Yunnan Laboratory of Molecular Biology of Domestic Animals, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China.,Faculty of Agriculture, University of Ruhuna, Matara, Sri Lanka
| | - Moch Syamsul Arifin Zein
- Museum Zoologicum Bogoriense, Research Center for Biology, Indonesian Institute of Science (LIPI), Cibinong, Bogor, 16911, Indonesia
| | - Szilvia Kusza
- Institute of Animal Husbandry, Biotechnology and Nature Conservation, University of Debrecen, Debrecen, H-4032, Hungary
| | - Hamed Kharrati-Koopaee
- Department of Animal Science, Shahid Bahonar University of Kerman, P.O. Box 76169133, Kerman, Iran.,Institute of Biotechnology, School of Agriculture, Shiraz University, P.O. Box 1585, Shiraz, Iran
| | - Lin Zeng
- State Key Laboratory of Genetic Resources and Evolution, Yunnan Laboratory of Molecular Biology of Domestic Animals, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China.,Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, 650204, China
| | - Yun-Mei Wang
- Center for Neurobiology and Brain Restoration, Skolkovo Institute of Science and Technology, Moscow, 143026, Russia
| | - Ting-Ting Yin
- State Key Laboratory of Genetic Resources and Evolution, Yunnan Laboratory of Molecular Biology of Domestic Animals, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China.,Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, 650204, China
| | - Min-Min Yang
- State Key Laboratory of Genetic Resources and Evolution, Yunnan Laboratory of Molecular Biology of Domestic Animals, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China.,Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, 650204, China
| | - Ming-Li Li
- State Key Laboratory of Genetic Resources and Evolution, Yunnan Laboratory of Molecular Biology of Domestic Animals, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China.,Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, 650204, China
| | - Xue-Mei Lu
- State Key Laboratory of Genetic Resources and Evolution, Yunnan Laboratory of Molecular Biology of Domestic Animals, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China.,Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, 650204, China.,Center for Excellence in Animal Evolution and Genetics, Chinese Academy of Sciences, Kunming, 650204, China
| | - Emiliano Lasagna
- Dipartimento di Scienze Agrarie, Alimentarie Ambientali, University of Perugia, 06123, Perugia, Italy
| | - Simone Ceccobelli
- Dipartimento di Scienze Agrarie, Alimentarie Ambientali, University of Perugia, 06123, Perugia, Italy
| | | | | | - Shao-Hong Feng
- State Key Laboratory of Genetic Resources and Evolution, Yunnan Laboratory of Molecular Biology of Domestic Animals, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China.,BGI-Shenzhen, Beishan Industrial Zone, Shenzhen, 518083, China
| | - Hao Zhang
- Laboratory of Animal Genetics, Breeding and Reproduction, National Engineering Laboratory for Animal Breeding, College of Animal Science and Technology, China Agricultural University, Ministry of Agriculture of China, Beijing, 100193, China
| | | | | | | | - Le Thi Thuy
- National Institute of Animal Husbandry, Hanoi, Vietnam
| | - Okeyo A Mwai
- Livestock Genetics Program, International Livestock Research Institute (ILRI), Nairobi, 00100, Kenya
| | | | - Guojie Zhang
- State Key Laboratory of Genetic Resources and Evolution, Yunnan Laboratory of Molecular Biology of Domestic Animals, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China.,Center for Excellence in Animal Evolution and Genetics, Chinese Academy of Sciences, Kunming, 650204, China.,China National Genebank, BGI-Shenzhen, Shenzhen, 518083, China.,Centre for Social Evolution, Department of Biology, University of Copenhagen, DK-1870, Copenhagen, Denmark
| | - Kai-Xing Qu
- Yunnan Academy of Grassland and Animal Science, Kunming, 650212, China
| | - Olivier Hanotte
- Cells, Organisms and Molecular Genetics, School of Life Sciences, University of Nottingham, Nottingham, NG7 2RD, UK.,Livestock Genetics Program, International Livestock Research Institute (ILRI), P.O. Box 5689, Addis Ababa, Ethiopia
| | - Beth Shapiro
- Howard Hughes Medical Institute, University of California Santa Cruz, Santa Cruz, CA, 95064, USA.,Department of Ecology and Evolutionary Biology, University of California Santa Cruz, Santa Cruz, CA, 95064, USA
| | - Mirte Bosse
- Wageningen University & Research - Animal Breeding and Genomics, 6708 PB, Wageningen, The Netherlands.
| | - Dong-Dong Wu
- State Key Laboratory of Genetic Resources and Evolution, Yunnan Laboratory of Molecular Biology of Domestic Animals, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China. .,Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, 650204, China. .,Center for Excellence in Animal Evolution and Genetics, Chinese Academy of Sciences, Kunming, 650204, China.
| | - Jian-Lin Han
- CAAS-ILRI Joint Laboratory on Livestock and Forage Genetic Resources, Institute of Animal Science, Chinese Academy of Agricultural Sciences (CAAS), Beijing, 100193, China. .,Livestock Genetics Program, International Livestock Research Institute (ILRI), Nairobi, 00100, Kenya.
| | - Ya-Ping Zhang
- State Key Laboratory of Genetic Resources and Evolution, Yunnan Laboratory of Molecular Biology of Domestic Animals, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, 650223, China. .,Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, 650204, China. .,Center for Excellence in Animal Evolution and Genetics, Chinese Academy of Sciences, Kunming, 650204, China. .,State Key Laboratory for Conservation and Utilization of Bio-resource, Yunnan University, Kunming, 650091, China.
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18
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Tram LH, Thu Huong T, Thi Thuy L, Van Thong N, Tuan Anh N, Hoang Minh N, Thu Ha T, Anh Dung D, Thao NP, Thuong PT, Le DD, Hiep ND, Shin HJ. A new triterpenoid from the stems of Kadsura coccinea with antiproliferative activity. Nat Prod Res 2021; 36:2542-2546. [PMID: 34075849 DOI: 10.1080/14786419.2021.1914612] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
A series of schiartane C29 nortriterpenoids with 5/5/7/6/5 membered consecutive rings (1‒5) with an unique schinortriterpenoid skeleton including a new, kadcoccilactone V (1), together with four known ones (2‒5) and three known triterpenoids (6‒8) were identified from stems of Kadsura coccinea (Lem.) A. C. Smith. The structures of 1 and known compounds were elucidated by interpretation of 1D and 2D NMR, and HR-ESI-MS data as well as comparing those data in the literature. All the isolated compounds were examined for cytotoxic effects against six human cancer cell lines [(HCT-15 (colon), NUGC-3 (stomach), NCI-H23 (lung), ACHN (renal), PC-3 (prostate), and MDA-MB-231 (breast)]. Among them, compound 6 showed potent cytotoxicity against NCI-H23 (GI50 1.28 µM) and NUGC-3 (GI50 1.28 µM), and significantly inhibited on PC-3, MDA-MB-231, ACHN, HCT-15 with GI50 values around 2.33 to 2.67 µM.
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Affiliation(s)
- Le Huyen Tram
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Tran Thu Huong
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Le Thi Thuy
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Nguyen Van Thong
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Nguyen Tuan Anh
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Nguyen Hoang Minh
- School of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
| | - Tran Thu Ha
- Intellectual Property Office of Vietnam, Hanoi, Vietnam
| | - Dao Anh Dung
- Intellectual Property Office of Vietnam, Hanoi, Vietnam
| | - Nguyen Phuong Thao
- Institute of Marine Biochemistry (IMBC), Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Phuong Thien Thuong
- Biotechnology Department, Vietnam - Korea Institute of Science and Technology, Hanoi, Vietnam
| | - Duc Dat Le
- Division of Computational Physics, Institute for Computational Science, Ton Duc Thang University, Ho Chi Minh City, Vietnam.,Faculty of Pharmacy, Ton Duc Thang University, Ho Chi Minh City, Vietnam
| | - Nguyen Dinh Hiep
- Faculty of Pharmacy, Ton Duc Thang University, Ho Chi Minh City, Vietnam
| | - Hee Jae Shin
- Department of Marine Biotechnology, University of Science and Technology (UST), Daejeon, Korea.,Marine Natural Products Chemistry Laboratory, Korea Institute of Ocean Science and Technology, Busan, Korea
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19
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Bae Y, Thuy LT, Lee YH, Ko KS, Han J, Choi JS. Polyplexes of Functional PAMAM Dendrimer/Apoptin Gene Induce Apoptosis of Human Primary Glioma Cells In Vitro. Polymers (Basel) 2019; 11:E296. [PMID: 30960280 PMCID: PMC6419211 DOI: 10.3390/polym11020296] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2018] [Revised: 02/01/2019] [Accepted: 02/07/2019] [Indexed: 01/21/2023] Open
Abstract
Highly efficient and safe gene delivery has become an important aspect of neuronal gene therapy. We evaluated the ability of polyamidoamine (PAMAM) dendrimer grafted with phenylalanine, histidine, and arginine (PAMAM-FHR), a nonviral gene delivery vector, to deliver a therapeutic, tumor cell-specific killer gene, apoptin, into the human primary glioma cell line GBL-14 and human dermal fibroblasts. We performed a transfection assay using plasmids of luciferase and enhanced green fluorescent protein (EGFP) and assessed cell viability. Both cell lines were treated with complexes of PAMAM-FHR and apoptin after which their intracellular uptake and localization were examined by fluorescence-activated cell sorting (FACS)analysis and confocal laser scanning microscopy. Confocal microscopy showed that the PAMAM-FHR escaped from the endo-lysosome into the cytosol. Cell cycle phase distribution analysis, annexin V staining, and a tetramethylrhodamine ethyl ester (TMRE) assay established that apoptin triggered apoptosis in the GBL-14 cell line but not in normal fibroblasts. These results indicated that the PAMAM-FHR/apoptin complex is an effective gene vehicle for cancer therapy in vitro.
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Affiliation(s)
- Yoonhee Bae
- Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan 47392, Korea.
| | - Le Thi Thuy
- Department of Biochemistry, College of Natural Sciences, Chungnam National University, Daejeon 305-764, Korea.
| | - Young Hwa Lee
- Department of Biochemistry, College of Natural Sciences, Chungnam National University, Daejeon 305-764, Korea.
| | - Kyung Soo Ko
- Department of Internal Medicine, Sanggye Paik Hospital, Cardiovascular and Metabolic Disease Center, Inje University, Seoul 100-032, Korea.
| | - Jin Han
- Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan 47392, Korea.
| | - Joon Sig Choi
- Department of Biochemistry, College of Natural Sciences, Chungnam National University, Daejeon 305-764, Korea.
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Jeong Y, Thuy LT, Ki SH, Ko S, Kim S, Cho WK, Choi JS, Kang SM. Multipurpose Antifouling Coating of Solid Surfaces with the Marine-Derived Polymer Fucoidan. Macromol Biosci 2018; 18:e1800137. [DOI: 10.1002/mabi.201800137] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 07/04/2018] [Indexed: 12/31/2022]
Affiliation(s)
- Yeonwoo Jeong
- Department of Chemistry; Chungbuk National University; Chungbuk 28644 Republic of Korea
| | - Le Thi Thuy
- Department of Biochemistry; Chungnam National University; Daejeon 34134 Republic of Korea
| | - So Hyun Ki
- Department of Chemistry; Chungnam National University; Daejeon 34134 Republic of Korea
| | - Sangwon Ko
- Transportation Environmental Research Team; Korea Railroad Research Institute; Uiwang 16105 Republic of Korea
| | - Suyeob Kim
- Department of Marine Biomaterials and Aquaculture; Pukyong National University; Busan 48513 Republic of Korea
| | - Woo Kyung Cho
- Department of Chemistry; Chungnam National University; Daejeon 34134 Republic of Korea
| | - Joon Sig Choi
- Department of Biochemistry; Chungnam National University; Daejeon 34134 Republic of Korea
| | - Sung Min Kang
- Department of Chemistry; Chungbuk National University; Chungbuk 28644 Republic of Korea
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Bui VT, Thi Thuy L, Choi JS, Choi HS. Ordered cylindrical micropatterned Petri dishes used as scaffolds for cell growth. J Colloid Interface Sci 2018; 513:161-169. [DOI: 10.1016/j.jcis.2017.11.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Revised: 11/02/2017] [Accepted: 11/08/2017] [Indexed: 12/26/2022]
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Mallick S, Thuy LT, Lee S, Park JII, Choi JS. Liposomes containing cholesterol and mitochondria-penetrating peptide (MPP) for targeted delivery of antimycin A to A549 cells. Colloids Surf B Biointerfaces 2018; 161:356-364. [DOI: 10.1016/j.colsurfb.2017.10.052] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Revised: 10/13/2017] [Accepted: 10/17/2017] [Indexed: 11/24/2022]
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Periasamy K, Vahidi S, Silva P, Faruque M, Naqvi A, Basar M, Cao J, Zhao S, Thuy LT, Pichler R, Podesta MG, Shamsuddin M, Boettcher P, Garcia JF, Han JL, Marsan PA, Diallo A, Viljoen GJ. Mapping molecular diversity of indigenous goat genetic resources of Asia. Small Rumin Res 2017. [DOI: 10.1016/j.smallrumres.2016.12.035] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Thuy LT, Binh DV, Binh NT, Minh LQ, Thuy TTT, Ton ND, Ba NV, Han JL, Periasamy K. Evaluation of genetic diversity and structure of Vietnamese goat populations using multi locus microsatellite markers. Small Rumin Res 2017. [DOI: 10.1016/j.smallrumres.2016.12.029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Thuy LT, Mallick S, Choi JS. Polyamidoamine (PAMAM) dendrimers modified with short oligopeptides for early endosomal escape and enhanced gene delivery. Int J Pharm 2015; 492:233-43. [PMID: 26187169 DOI: 10.1016/j.ijpharm.2015.07.017] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 06/15/2015] [Accepted: 07/07/2015] [Indexed: 11/29/2022]
Abstract
Recently, non-viral vectors have become a popular research topic in the field of gene therapy. In this study, we conjugated short oligopeptides to polyamidoamine-generation 4 (PAMAM G4) to achieve higher transfection efficiency. Previous reports have shown that the PAMAM G4-histidine (H)-arginine (R) dendrimer enhances gene delivery by improving cell penetration and internalization mechanisms. Therefore, we synthesized PAMAM G4-H phenylalanine (F) R, PAMAM G4-FHR and PAMAM G4-FR derivatives to determine the best gene carrier with the lowest toxicity. Physicochemical studies were performed to determine mean diameters and surface charge of PAMAM derivatives/pDNA polyplexes. DNA condensation was confirmed using a gel retardation assay. Cytotoxicity and transfection efficiency were analyzed using human cervical carcinoma (HeLa) and human liver carcinoma (HepG2) cells. Similar levels of transfection were achieved in both cell lines by using gold standard transfection reagent PEI 25 kD. Therefore, our results show that these carriers are promising and may help achieve higher transfection with negligible cytotoxicity.
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Affiliation(s)
- Le Thi Thuy
- Department of Biochemistry, Chungnam National University, Gung-dong 220, Yuseong-gu, Daejeon 305-764, Republic of Korea
| | - Sudipta Mallick
- Department of Biochemistry, Chungnam National University, Gung-dong 220, Yuseong-gu, Daejeon 305-764, Republic of Korea
| | - Joon Sig Choi
- Department of Biochemistry, Chungnam National University, Gung-dong 220, Yuseong-gu, Daejeon 305-764, Republic of Korea.
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Bett R, Bhuiyan A, Khan M, Silva G, Thuy LT, Islam F, Abeykoon M, Nguyen T, Sadef S, Mwai O, Ibrahim M. Phenotypic Variation of Native Chicken Populations in the South and South East Asia. ACTA ACUST UNITED AC 2014. [DOI: 10.3923/ijps.2014.449.460] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Thi Thuy L, Xuan Tien H, Dinh Hoang V, Khac Vu T. Design, Synthesis and In Vitro Antimalarial Evaluation of New Quinolinylhydrazone Derivatives. LETT DRUG DES DISCOV 2012. [DOI: 10.2174/157018012799079815] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Lemke U, Kaufmann B, Thuy LT, Emrich K, Zárate AV. Evaluation of biological and economic efficiency of smallholder pig production systems in North Vietnam. Trop Anim Health Prod 2007; 39:237-54. [PMID: 17847819 DOI: 10.1007/s11250-007-9001-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
This study evaluates smallholder pig production systems in North Vietnam, comparing a semi-intensive system near a town with good market access, where a Vietnamese improved breed has replaced the indigenous pig breed, and an extensive system away from town, where the indigenous breed still prevails. Fieldwork was conducted in 64 households in four villages. Repeated farm visits yielded 234 structured interviews. Data were analysed by linear models and non-parametric tests. Production inputs and outputs were quantified, and feed use efficiency and economic efficiency were assessed. The gross margin was higher for semi-intensive production with the improved breed, while the benefit-cost ratio was higher under extensive conditions with the indigenous breed. The net benefit did not differ between systems. Twenty-four per cent of farmers yielded a negative net benefit. In one village under extensive conditions, live weight output from indigenous sows with crossbred offspring compared positively with the output from semi-intensive production with improved genotypes, but was associated with high inputs, making production inefficient. Results indicate that improved genotypes might not be an efficient production alternative for saving-oriented production with limited resource supply. Suitability of evaluation parameters, farmers' production aims, and factors impacting the production success in different systems are discussed.
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Affiliation(s)
- U Lemke
- Department of Animal Breeding and Husbandry 480a, University of Hohenheim, Institute of Animal Production in the Tropics and Subtropics, Garbenstr. 17, 70599 Stuttgart, Germany.
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Drucker AG, Bergeron E, Lemke U, Thuy LT, Valle Zárate A. Identification and quantification of subsidies relevant to the production of local and imported pig breeds in Vietnam. Trop Anim Health Prod 2006; 38:305-22. [PMID: 17137133 DOI: 10.1007/s11250-006-4386-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Livestock diversity contributes in many ways to human survival and well-being, while its loss reduces options for attaining sustainable agriculture and universal food security. The current rapid rate of loss of this diversity is the result of a number of underlying factors. While in some cases changes in production systems and consumer preferences reflect the natural evolution of developing economies and markets, in other cases production systems, breed choice and consumer preferences have been distorted by local, national and international policy. In the context of a widespread threat to local pig breeds in Vietnam, this paper identifies and quantifies the level of agricultural subsidies that are currently contributing to this process of breed substitution. Producer subsidies-which tend to improve the competitiveness of imported breeds and their crosses over local breeds--are shown to be considerable, and mitigating measures are now urgently needed to avoid an irreversible loss of livestock diversity.
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Affiliation(s)
- A G Drucker
- International Livestock Research Institute, Addis Ababa, Ethiopia.
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Thévenon S, Thuy LT, Ly LV, Maudet F, Bonnet A, Jarne P, Maillard JC. Microsatellite Analysis of Genetic Diversity of the Vietnamese Sika Deer (Cervus nippon pseudaxis). J Hered 2004; 95:11-8. [PMID: 14757725 DOI: 10.1093/jhered/esh001] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The Vietnamese sika deer (Cervus nippon pseudaxis) is an endangered subspecies of economic and traditional value in Vietnam. Most living individuals are held in traditional farms in central Vietnam, others being found in zoos around the world. Here we study the neutral genetic diversity and population structure of this subspecies using nine microsatellite loci in order to evaluate the consequences of the limited number of individuals from which this population was initiated and of the breeding practices (i.e., possible inbreeding). Two hundred individuals were sampled from several villages. Our data show both evidence for limited local inbreeding and isolation by distance with a mean F(ST) value of 0.02 between villages. This suggests that exchange of animals occurs at a local scale, at a rate such that highly inbred mating is avoided. However, the genetic diversity, with an expected heterozygosity (H(e)) of 0.60 and mean number of alleles (k) of 5.7, was not significantly larger than that estimated from zoo populations of much smaller census size (17 animals sampled; H(e) = 0.65, k = 4.11). Our results also suggest that the Vietnamese population might have experienced a slight bottleneck. However, this population is sufficiently variable to constitute a source of individuals for reintroduction in the wild in Vietnam.
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Affiliation(s)
- S Thévenon
- CIRAD-EMVT, Rangeland and Wildlife Management Program, TA 30/F, Campus International de Baillarguet, 34398 Montpellier cedex 5, France
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Hayano M, Thuy LT. [Hereditary QT prolongation syndrome]. Nihon Rinsho 2001; 59 Suppl 8:812-5. [PMID: 11808313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Affiliation(s)
- M Hayano
- Third Department of Internal Medicine, Nagasaki University School of Medicine
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Dekker E, Romijn JA, Ackermans MT, Endert E, Kager PA, Thuy LT, Sauerwein HP. Indomethacin stimulates glucose production in adults with uncomplicated falciparum malaria. Metabolism 1998; 47:217-22. [PMID: 9472974 DOI: 10.1016/s0026-0495(98)90224-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
In healthy subjects, basal hepatic glucose production is (partly) regulated by paracrine intrahepatic factors. It is unknown if these paracrine factors also influence basal glucose production in infectious diseases with increased glucose production. We compared the effects of 150 mg indomethacin (n = 9), a nonendocrine stimulator of glucose production in healthy adults, and placebo (n = 7) on hepatic glucose production in Vietnamese adults with uncomplicated falciparum malaria. Glucose production was measured by primed, continuous infusion of [6,6-2H2]glucose. After indomethacin, the plasma glucose concentration and glucose production increased in all subjects from 5.3 +/- 0.1 mmol/L to a maximum of 7.1 +/- 0.3 mmol/L (P < .05) and from 17.6 +/- 0.8 micromol x kg(-1) x min(-1) to a maximum of 26.2 +/- 2.5 micromol x kg(-1) x min(-1) (P < .05), respectively. In the control group, the plasma glucose concentration and glucose production declined gradually during 4 hours from 5.4 +/- 0.2 mmol/L to 5.1 +/- 0.1 mmol/L (P < .05) and from 17.1 +/- 0.8 micromol x kg(-1) x min(-1) to 15.1 +/- 1.0 micromol x kg(-1) x min(-1) (P < .05), respectively. There were no differences in plasma concentrations of insulin, counterregulatory hormones, or cytokines between the groups. We conclude that indomethacin administration results in a transient increase in glucose production in patients with uncomplicated falciparum malaria in the absence of changes in plasma concentrations of glucoregulatory hormones or cytokines. Thus, this study indicates that in uncomplicated falciparum malaria, the rate of basal hepatic glucose production is also regulated by paracrine intrahepatic factors.
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Affiliation(s)
- E Dekker
- Department of Internal Medicine, Academic Medical Center, University of Amsterdam, The Netherlands
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Schecter A, Toniolo P, Dai LC, Thuy LT, Wolff MS. Blood levels of DDT and breast cancer risk among women living in the north of Vietnam. Arch Environ Contam Toxicol 1997; 33:453-456. [PMID: 9419265 DOI: 10.1007/s002449900276] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
A positive association has been reported between elevated tissue organochlorines (p,p'-DDT/p,p'-DDE, PCBs, dioxins) and breast cancer in some case-control studies and occupational cohort studies. We previously reported high serum levels of p,p'-DDT and its metabolite p,p'-DDE in women living throughout Vietnam. We report here the results of a small hospital-based case-control study examining the association between blood levels of p,p'-DDT/p,p'-DDE and the risk of invasive breast cancer among residents of the north of Vietnam-an area where insecticides such as p,p'-DDT have been heavily used in the recent past. The study was conducted among patients admitted to a single hospital in the capital city of Hanoi in 1994. Study subjects were 21 women newly diagnosed with invasive adenocarcinoma of the breast, who served as cases, and 21 women of similar age with fibrocystic breast disease, who served as controls. No increase was evident in the relative risk of breast cancer with increasing tertiles of serum concentration of the compounds of interest, even after adjustment for major potential confounders, such as age at menarche, parity, history of lactation, and body weight. These results suggest that recent and past exposure to p,p'-DDT does not play an important role in the etiology of breast cancer among women living in a country with a tropical climate where insecticide use for mosquito control is common.
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Affiliation(s)
- A Schecter
- Department of Preventive Medicine, Clinical Campus, State University of New York, Health Science Center-Syracuse, 88 Aldrich Avenue, Binghamton, New York 13903, USA
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Dekker E, Romijn JA, Ekberg K, Wahren J, Van Thien H, Ackermans MT, Thuy LT, Chandramouli V, Kager PA, Landau BR, Sauerwein HP. Glucose production and gluconeogenesis in adults with uncomplicated falciparum malaria. Am J Physiol 1997; 272:E1059-64. [PMID: 9227452 DOI: 10.1152/ajpendo.1997.272.6.e1059] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Although glucose production is increased in severe malaria, the influence of uncomplicated malaria on glucose production is unknown. Therefore, we measured in eight adult Vietnamese patients with uncomplicated falciparum malaria and eight healthy Vietnamese controls glucose production (by infusion of [6,6-2H2]glucose) and the fractional contribution of gluconeogenesis (by oral ingestion of 2H2O); glycogenolysis was calculated as the difference between the two. After 20 h of fasting, plasma glucose was 4.7 +/- 0.2 mmol/l in the patients and 4.3 +/- 0.2 mmol/l in the controls (not significant). Glucose production was approximately 25% higher in the patients (16.9 +/- 1.3 vs. 13.4 +/- 0.3 mumol.kg-1.min-1, P = 0.01). Fractional and absolute gluconeogenesis were increased in the patients (approximately 87 vs. approximately 59%, P < 0.001; and 14.6 +/- 1.3 vs. 7.9 +/- 0.2 mumol.kg-1.min-1, P < 0.001, respectively). The contribution of glycogenolysis to total glucose production was decreased in the patients: 2.3 +/- 0.5 vs. 5.5 +/- 0.4 mumol.kg-1.min-1 (P < 0.002). In conclusion, in adult patients with uncomplicated falciparum malaria, glucose production is increased by approximately 25% due to an increased rate of gluconeogenesis, whereas glycogenolysis is decreased. The mechanism by which these changes occur is uncertain. However, counterregulatory hormone and cytokine concentrations were increased in the patients.
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Affiliation(s)
- E Dekker
- Department of Internal Medicine, University of Amsterdam, The Netherlands
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Schecter A, Dai LC, Thuy LT, Quynh HT, Minh DQ, Cau HD, Phiet PH, Nguyen NT, Constable JD, Baughman R. Agent Orange and the Vietnamese: the persistence of elevated dioxin levels in human tissues. Am J Public Health 1995; 85:516-22. [PMID: 7702115 PMCID: PMC1615128 DOI: 10.2105/ajph.85.4.516] [Citation(s) in RCA: 75] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
OBJECTIVES The largest known dioxin contamination occurred between 1962 and 1970, when 12 million gallons of Agent Orange, a defoliant mixture contaminated with a form of the most toxic dioxin, were sprayed over southern and central Vietnam. Studies were performed to determine if elevated dioxin levels persist in Vietnamese living in the south of Vietnam. METHODS With gas chromatography and mass spectroscopy, human milk, adipose tissue, and blood from Vietnamese living in sprayed and unsprayed areas were analyzed, some individually and some pooled, for dioxins and the closely related dibenzofurans. RESULTS One hundred sixty dioxin analyses of tissue from 3243 persons were performed. Elevated 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) levels as high as 1832 ppt were found in milk lipid collected from southern Vietnam in 1970, and levels up to 103 ppt were found in adipose tissue in the 1980s. Pooled blood collected from southern Vietnam in 1991/92 also showed elevated TCDD up to 33 ppt, whereas tissue from northern Vietnam (where Agent Orange was not used) revealed TCDD levels at or below 2.9 ppt. CONCLUSIONS Although most Agent Orange studies have focused on American veterans, many Vietnamese had greater exposure. Because health consequences of dioxin contamination are more likely to be found in Vietnamese living in Vietnam than in any other populations, Vietnam provides a unique setting for dioxin studies.
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Affiliation(s)
- A Schecter
- Department of Preventive Medicine, State University of New York Health Science Center-Syracuse, Binghamton 13902, USA
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Verger P, Cordier S, Thuy LT, Bard D, Dai LC, Phiet PH, Gonnord MF, Abenhaim L. Correlation between dioxin levels in adipose tissue and estimated exposure to Agent Orange in south Vietnamese residents. Environ Res 1994; 65:226-242. [PMID: 8187739 DOI: 10.1006/enrs.1994.1034] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
To permit new epidemiologic studies of the effects of dioxin on humans in Vietnam, we evaluated a model for quantifying exposure to Agent Orange (exposure index) based on the residential histories of 27 Vietnamese subjects and on information about spraying from the U.S. Army records (Herbs Tape) and compared this index to the dioxin levels measured in the subjects' adipose tissue. The mean dioxin level was 7.8 ppt, and dioxin and furan isomer profiles were similar to those already reported in industrialized countries. In addition, there was a highly significant correlation between the levels of almost all the isomers, whatever their degree of chlorination. For the group of 27 subjects, we found a Pearson correlation coefficient of 0.36 (P = 0.07) between the dioxin levels and the exposure index after log-transformation of both variables. When the analysis was restricted to the 22 subjects with a positive exposure index, the Pearson correlation coefficient rose to 0.50 (P = 0.02). We conclude that despite the limitations and power conditions of the study, this result is encouraging because it will be useful for future epidemiologic studies in Vietnam.
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Affiliation(s)
- P Verger
- Unit 170 of Epidemiological and Statistical Research on Health and Environment, National Institute of Health and Medical Research (INSERM), Villejuif, France
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Werner H, Jenssen HL, Köhler H, von Broen B, Pasternak G, Thuy LT, Schlott B, Pasternak L. Cellular sensitization in tumor-bearing mice to soluble extracts from normal and malignant tissues. I. Common and individually distinct antigens as detected by electrophoretic mobility (EM) test. Eur J Cancer 1978; 14:485-90. [PMID: 77224 DOI: 10.1016/0014-2964(78)90250-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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