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Tong AP, Zhou LX, Wang HX, Liu C, Li YY, Cao Y, Zhao L, Zhao YJ, Deng ZA. TUG-891 inhibits neuronal endoplasmic reticulum stress and pyroptosis activation and protects neurons in a mouse model of intraventricular hemorrhage. Neural Regen Res 2023; 18:2278-2284. [PMID: 37056148 DOI: 10.4103/1673-5374.369116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023] Open
Abstract
Pyroptosis plays an important role in hemorrhagic stroke. Excessive endoplasmic reticulum stress can cause endoplasmic reticulum dysfunction and cellular pyroptosis by regulating the nucleotide-binding oligomerization domain and leucine-rich repeat pyrin domain-containing protein 3 (NLRP3) pathway. However, the relationship between pyroptosis and endoplasmic reticulum stress after intraventricular hemorrhage is unclear. In this study, we established a mouse model of intraventricular hemorrhage and found pyroptosis and endoplasmic reticulum stress in brain tissue. Intraperitoneal injection of the selective GPR120 agonist TUG-891 inhibited endoplasmic reticulum stress, pyroptosis, and inflammation and protected neurons. The neuroprotective effect of TUG-891 appears related to inhibition of endoplasmic reticulum stress and pyroptosis activation.
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Tong AP, Zhou LX, Liu C, Cao Y, Wang HX, Zhao L, Chen YX, Zhong KH, Li GW, Wang GQ, Huang KR. Necrostatin-1 decreases necroptosis and inflammatory markers after intraventricular hemorrhage in mice. Neural Regen Res 2022; 17:2710-2716. [PMID: 35662218 PMCID: PMC9165399 DOI: 10.4103/1673-5374.339488] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Necrostatin-1, an inhibitor of necroptosis, can effectively inhibit necrotic apoptosis in neurological diseases, which results in the inhibition of inflammation, endoplasmic reticulum stress, and reactive oxygen species production and substantial improvement of neurological function. However, the effects of necrostatin-1 on intraventricular hemorrhage (IVH) remain unknown. In this study, we established a mouse model of IVH by injecting autologous blood into the lateral ventricle of the brain. We also injected necrostatin-1 into the lateral ventricle one hour prior to IVH induction. We found that necrostatin-1 effectively reduced the expression levels of the necroptosis markers receptor-interacting protein kinase (RIP)1, RIP3, mixed lineage kinase domain-like protein (MLKL), phosphorylated (p)-RIP3, and p-MLKL and the levels of interleukin-1β , interleukin-6, and tumor necrosis factor-α in the surrounding areas of the lateral ventricle. However, necrostatin-1 did not reduce ependymal ciliary injury or brain water content. These findings suggest that necrostatin-1 can prevent local inflammation and microglial activation induced by IVH but does not greatly improve prognosis.
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Li CC, Tang XY, Zhu YB, Song YJ, Zhao NL, Huang Q, Mou XY, Luo GH, Liu TG, Tong AP, Tang H, Bao R. Structural analysis of the sulfatase AmAS from Akkermansia muciniphila. Acta Crystallogr D Struct Biol 2021; 77:1614-1623. [DOI: 10.1107/s2059798321010317] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 10/05/2021] [Indexed: 11/11/2022] Open
Abstract
Akkermansia muciniphila, an anaerobic Gram-negative bacterium, is a major intestinal commensal bacterium that can modulate the host immune response. It colonizes the mucosal layer and produces nutrients for the gut mucosa and other commensal bacteria. It is believed that mucin desulfation is the rate-limiting step in the mucin-degradation process, and bacterial sulfatases that carry out mucin desulfation have been well studied. However, little is known about the structural characteristics of A. muciniphila sulfatases. Here, the crystal structure of the premature form of the A. muciniphila sulfatase AmAS was determined. Structural analysis combined with docking experiments defined the critical active-site residues that are responsible for catalysis. The loop regions I–V were proposed to be essential for substrate binding. Structure-based sequence alignment and structural superposition allow further elucidation of how different subclasses of formylglycine-dependent sulfatases (FGly sulfatases) adopt the same catalytic mechanism but exhibit diverse substrate specificities. These results advance the understanding of the substrate-recognition mechanisms of A. muciniphila FGly-type sulfatases. Structural variations around the active sites account for the different substrate-binding properties. These results will enhance the understanding of the roles of bacterial sulfatases in the metabolism of glycans and host–microbe interactions in the human gut environment.
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Li CC, Yang MJ, Yang J, Kang M, Li T, He LH, Song YJ, Zhu YB, Zhao NL, Zhao C, Huang Q, Mou XY, Li H, Tong AP, Tang H, Bao R. Structural and biochemical analysis of 1-Cys peroxiredoxin ScPrx1 from Saccharomyces cerevisiae mitochondria. Biochim Biophys Acta Gen Subj 2020; 1864:129706. [PMID: 32805320 DOI: 10.1016/j.bbagen.2020.129706] [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] [Received: 10/16/2019] [Revised: 07/13/2020] [Accepted: 08/05/2020] [Indexed: 02/08/2023]
Abstract
BACKGROUND ScPrx1 is a yeast mitochondrial 1-Cys peroxiredoxins (Prx), a type of Prx enzyme which require thiol-containing reducing agents to resolve its peroxidatic cysteine. ScPrx1 plays important role in protection against oxidative stress. Mitochondrial thioredoxin ScTrx3 and glutathione have been reported to be the physiological electron donor for ScPrx1. However, the mechanism underlying their actions, especially the substrate recognition of ScPrx1 requires additional elucidation. METHODS The structure of ScPrx1 was obtained through crystallization experiments. The oligomeric state of ScPrx1 was monitored by Blue-Native PAGE. Mutations were generated by the QuikChange PCR-based method. The ScPrx1 activity assay was carried out by measuring the change of 340 nm absorption of the NADPH oxidation. RESULTS ScPrx1 exist as a homodimer in solution. The structure adopts a typical Prx-fold core which is preceded by an N-terminal β-hairpin and has a C-terminal extension. Mutations (Glu94Ala, Arg198Ala and Trp126) close to the active site could enhance the catalytic efficiency of ScPrx1 while His83Ala and mutations on α4-β6 region exhibited reduced activity. The biochemical data also show that the deletion or mutations on ScPrx1 C-terminal have 2-4.56 fold increased activity. CONCLUSION We inferred that conformational changes of ScPrx1 C-terminal segment were important for its reaction, and the α4-β6 loop regions around the ScPrx1 active sites were important for the catalytic function of ScPrx1. Collectively, these structural features provides a basis for understanding the diverse reductant species usage in different 1-Cys Prxs.
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Affiliation(s)
- Chang-Cheng Li
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West, China Hospital, Sichuan University and Collaborative Innovation Center
| | - Mei-Jia Yang
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West, China Hospital, Sichuan University and Collaborative Innovation Center
| | - Jing Yang
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West, China Hospital, Sichuan University and Collaborative Innovation Center
| | - Mei Kang
- Department of Laboratory medicine, West, China Hospital, Sichuan University
| | - Tao Li
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West, China Hospital, Sichuan University and Collaborative Innovation Center
| | - Li-Hui He
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West, China Hospital, Sichuan University and Collaborative Innovation Center
| | - Ying-Jie Song
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West, China Hospital, Sichuan University and Collaborative Innovation Center
| | - Yi-Bo Zhu
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West, China Hospital, Sichuan University and Collaborative Innovation Center
| | - Ning-Lin Zhao
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West, China Hospital, Sichuan University and Collaborative Innovation Center
| | - Chang Zhao
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West, China Hospital, Sichuan University and Collaborative Innovation Center
| | - Qin Huang
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West, China Hospital, Sichuan University and Collaborative Innovation Center
| | - Xing-Yu Mou
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West, China Hospital, Sichuan University and Collaborative Innovation Center
| | - Hong Li
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West, China Hospital, Sichuan University and Collaborative Innovation Center
| | - Ai-Ping Tong
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West, China Hospital, Sichuan University and Collaborative Innovation Center
| | - Hong Tang
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West, China Hospital, Sichuan University and Collaborative Innovation Center
| | - Rui Bao
- Center of Infectious Diseases, State Key Laboratory of Biotherapy, West, China Hospital, Sichuan University and Collaborative Innovation Center.
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Li J, Deng J, Yuan J, Fu J, Li X, Tong A, Wang Y, Chen Y, Guo G. Zonisamide-loaded triblock copolymer nanomicelles as a novel drug delivery system for the treatment of acute spinal cord injury. Int J Nanomedicine 2017; 12:2443-2456. [PMID: 28408816 PMCID: PMC5383091 DOI: 10.2147/ijn.s128705] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [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] [Indexed: 02/05/2023] Open
Abstract
Spinal cord injury (SCI) commonly leads to lifelong disability due to the limited regenerative capacity of the adult central nervous system. Nanomicelles can be used as therapeutic systems to provide effective treatments for SCI. In this study, a novel triblock monomethyl poly(ethylene glycol)-poly(l-lactide)-poly(trimethylene carbonate) copolymer was successfully synthesized. Next, polymeric nanomicelles loaded with zonisamide (ZNS), a Food and Drug Administration-approved antiepileptic drug, were prepared and characterized. The ZNS-loaded micelles (ZNS-M) were further utilized for the treatment of SCI in vitro and in vivo. The obtained ZNS-M were ~50 nm in diameter with good solubility and dispersibility. Additionally, these controlled-release micelles showed significant antioxidative and neuron-protective effects in vitro. Finally, our results indicated that ZNS-M treatment could promote motor function recovery and could increase neuron and axon density in a hemisection SCI model. In summary, these results may provide an experimental basis for the use of ZNS-M as a clinically applicable therapeutic drug for the treatment of SCI in the future.
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Affiliation(s)
- JingLun Li
- Department of Neurology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing
| | - JiaoJiao Deng
- State Key Laboratory of Biotherapy and Cancer Center, and Department of Neurosurgery, West China Hospital, Sichuan University, and Collaborative Innovation Center for Biotherapy, Chengdu, People's Republic of China
| | - JinXian Yuan
- Department of Neurology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing
| | - Jie Fu
- Department of Neurology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing
| | - XiaoLing Li
- State Key Laboratory of Biotherapy and Cancer Center, and Department of Neurosurgery, West China Hospital, Sichuan University, and Collaborative Innovation Center for Biotherapy, Chengdu, People's Republic of China
| | - AiPing Tong
- State Key Laboratory of Biotherapy and Cancer Center, and Department of Neurosurgery, West China Hospital, Sichuan University, and Collaborative Innovation Center for Biotherapy, Chengdu, People's Republic of China
| | - YueLong Wang
- State Key Laboratory of Biotherapy and Cancer Center, and Department of Neurosurgery, West China Hospital, Sichuan University, and Collaborative Innovation Center for Biotherapy, Chengdu, People's Republic of China
| | - YangMei Chen
- Department of Neurology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing
| | - Gang Guo
- State Key Laboratory of Biotherapy and Cancer Center, and Department of Neurosurgery, West China Hospital, Sichuan University, and Collaborative Innovation Center for Biotherapy, Chengdu, People's Republic of China
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Wu DM, Zhang P, Xu GC, Tong AP, Zhou C, Lang JY, Wang CT. Pemetrexed induces G1 phase arrest and apoptosis through inhibiting Akt activation in human non small lung cancer cell line A549. Asian Pac J Cancer Prev 2015; 16:1507-13. [PMID: 25743822 DOI: 10.7314/apjcp.2015.16.4.1507] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Pemetrexed is an antifolate agent which has been used for treating malignant pleural mesothelioma and non small lung cancer in the clinic as a chemotherapeutic agent. In this study, pemetrexed inhibited cell growth and induced G1 phase arrest in the A549 cell line. To explore the molecular mechanisms of pemetrexed involved in cell growth, we used a two-dimensional polyacrylamide gel electrophoresis (2-DE) proteomics approach to analyze proteins changed in A549 cells treated with pemetrexed. As a result, twenty differentially expressed proteins were identified by ESI-Q-TOF MS/MS analysis in A549 cells incubated with pemetrexed compared with non-treated A549 cells. Three key proteins (GAPDH, HSPB1 and EIF4E) changed in pemetrexed treated A549 cells were validated by Western blotting. Accumulation of GAPDH and decrease of HSPB1 and EIF4E which induce apoptosis through inhibiting phosphorylation of Akt were noted. Expression of p-Akt in A549 cells treated with pemetrexed was reduced. Thus, pemetrexed induced apoptosis in A549 cells through inhibiting the Akt pathway.
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Affiliation(s)
- Dong-Ming Wu
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University, Chengdu, Sichuan, China E-mail :
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Deng J, Wang Y, Zhou L, Gou M, Luo N, Chen H, Tong A, You C, Guo G. Fabrication and in vivo chondrification of a poly(propylene carbonate)/l-lactide-grafted tetracalcium phosphate electrospun scaffold for cartilage tissue engineering. RSC Adv 2015. [DOI: 10.1039/c5ra04442a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Fabrication and in vivo chondrification of poly(propylene carbonate)/l-lactide-grafted tetracalcium phosphate electrospun scaffold for cartilage tissue engineering.
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Affiliation(s)
- JiaoJiao Deng
- State Key Laboratory of Biotherapy and Cancer Center
- Department of Neurosurgery
- West China Hospital
- Sichuan University and Collaborative Innovation Center for Biotherapy
- Chengdu
| | - YueLong Wang
- State Key Laboratory of Biotherapy and Cancer Center
- Department of Neurosurgery
- West China Hospital
- Sichuan University and Collaborative Innovation Center for Biotherapy
- Chengdu
| | - LiangXue Zhou
- State Key Laboratory of Biotherapy and Cancer Center
- Department of Neurosurgery
- West China Hospital
- Sichuan University and Collaborative Innovation Center for Biotherapy
- Chengdu
| | - MaLing Gou
- State Key Laboratory of Biotherapy and Cancer Center
- Department of Neurosurgery
- West China Hospital
- Sichuan University and Collaborative Innovation Center for Biotherapy
- Chengdu
| | - Na Luo
- Nankai University School of Medicine
- Tianjin
- PR China
| | - HaiFeng Chen
- State Key Laboratory of Biotherapy and Cancer Center
- Department of Neurosurgery
- West China Hospital
- Sichuan University and Collaborative Innovation Center for Biotherapy
- Chengdu
| | - AiPing Tong
- State Key Laboratory of Biotherapy and Cancer Center
- Department of Neurosurgery
- West China Hospital
- Sichuan University and Collaborative Innovation Center for Biotherapy
- Chengdu
| | - Chao You
- State Key Laboratory of Biotherapy and Cancer Center
- Department of Neurosurgery
- West China Hospital
- Sichuan University and Collaborative Innovation Center for Biotherapy
- Chengdu
| | - Gang Guo
- State Key Laboratory of Biotherapy and Cancer Center
- Department of Neurosurgery
- West China Hospital
- Sichuan University and Collaborative Innovation Center for Biotherapy
- Chengdu
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Liang RC, Fang F, Wang YC, Song NJ, Li JH, Zhao CJ, Peng XC, Tong AP, Fang Y, He M, You C, Tan H. Gemini quaternary ammonium-incorporated biodegradable multiblock polyurethane micelles for brain drug delivery. RSC Adv 2015. [DOI: 10.1039/c4ra09908g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Gemini quaternary ammonium (GQA) incorporated biodegradable multiblock polyurethane (BMPUs) micelles could transport drug across blood–brain barrier and improve brain drug accumulation.
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9
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Wang Y, Deng J, Fan R, Tong A, Zhang X, Zhou L, Zheng Y, Xu J, Guo G. Novel nanoscale topography on poly(propylene carbonate)/poly(ε-caprolactone) electrospun nanofibers modifies osteogenic capacity of ADCs. RSC Adv 2015. [DOI: 10.1039/c5ra15841a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
In this study, we electrospun novel poly(propylene carbonate)/poly(ε-caprolactone) (PPC/PCL) nanofibers with a special nanoscale topography using a simple process.
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Affiliation(s)
- YueLong Wang
- State Key Laboratory of Biotherapy and Cancer Center
- Department of Neurosurgery
- West China Hospital
- Sichuan University
- Collaborative Innovation Center for Biotherapy
| | - JiaoJiao Deng
- State Key Laboratory of Biotherapy and Cancer Center
- Department of Neurosurgery
- West China Hospital
- Sichuan University
- Collaborative Innovation Center for Biotherapy
| | - RangRang Fan
- State Key Laboratory of Biotherapy and Cancer Center
- Department of Neurosurgery
- West China Hospital
- Sichuan University
- Collaborative Innovation Center for Biotherapy
| | - AiPing Tong
- State Key Laboratory of Biotherapy and Cancer Center
- Department of Neurosurgery
- West China Hospital
- Sichuan University
- Collaborative Innovation Center for Biotherapy
| | - XiaoNing Zhang
- Department of Pharmacology and Pharmaceutical Sciences
- School of Medicine
- Tsinghua University
- Collaborative Innovation Center for Biotherapy
- Beijing
| | - LiangXue Zhou
- State Key Laboratory of Biotherapy and Cancer Center
- Department of Neurosurgery
- West China Hospital
- Sichuan University
- Collaborative Innovation Center for Biotherapy
| | - Yu Zheng
- State Key Laboratory of Biotherapy and Cancer Center
- Department of Neurosurgery
- West China Hospital
- Sichuan University
- Collaborative Innovation Center for Biotherapy
| | - JianGuo Xu
- State Key Laboratory of Biotherapy and Cancer Center
- Department of Neurosurgery
- West China Hospital
- Sichuan University
- Collaborative Innovation Center for Biotherapy
| | - Gang Guo
- State Key Laboratory of Biotherapy and Cancer Center
- Department of Neurosurgery
- West China Hospital
- Sichuan University
- Collaborative Innovation Center for Biotherapy
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Abstract
Two new cyclobutane-type norlignans, methyl rel-(1R,2S,3S)-2-(7-methoxy-1,3-benzodioxol-5-yl)-3-(2,4,5-trimethoxyphenyl)cyclobutanecarboxylate (1), and methyl rel-(1R,2R,3S)-2-(7-methoxy-1,3-benzodioxol-5-yl)-3-(2,4,5-trimethoxyphenyl)cyclobutanecarboxylate (2), and a new lignanamide, 3-hydroxy-N-[2-(4-hydroxyphenyl)ethyl]-α-[4-(2-{N-[2-(4-hydroxyphenyl)ethyl]carbamoyl}ethenyl)-3-methoxyphenoxy]-4-methoxycinnamamide 4,8″-ether (3), along with five known amides, 4-8, were obtained from the whole plant of Peperomia tetraphylla. Their structures were elucidated mainly by the analysis of NMR and MS data. The new compounds 1-3 and the known compound 4 were tested for their cytotoxic activities against the HepG2 (human hepatocarcinoma), A549 (human lung cancer), and HeLa (human cervical cancer) cell lines. Compound 4 showed significant cytotoxicity against HepG2 cell lines with an IC(50) value of 9.4 ± 1.0 μM.
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Affiliation(s)
- Yun-Zhi Li
- College of Tea and Food Science, Anhui Agricultural University, Hefei, P. R. China
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11
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Tang J, Chen JY, Liu J, Luo M, Wang YJ, Wei XW, Gao X, Wang BL, Liu YB, Yi T, Tong AP, Song XR, Xie YM, Zhao Y, Xiang M, Huang Y, Zheng Y. Calcium phosphate embedded PLGA nanoparticles: a promising gene delivery vector with high gene loading and transfection efficiency. Int J Pharm 2012; 431:210-21. [PMID: 22561795 DOI: 10.1016/j.ijpharm.2012.04.046] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2011] [Revised: 03/27/2012] [Accepted: 04/17/2012] [Indexed: 10/28/2022]
Abstract
In the purpose of increasing incorporation efficiency and improving the release kinetics of plasmid DNA (pDNA) from poly(D,L-lactide-co-glycolide) (PLGA) nanoparticles, a facile method for the fabrication of calcium phosphate (CaPi) embedded PLGA nanoparticles (CaPi-pDNA-PLGA-NPs) was developed. The effect of several preparation factors on the particle size, incorporation efficiency, pDNA release and transfection efficiency in vitro was studied by Single Factor Screening Method. These preparation factors included the molecular weight (MW), hydrolysis degree (HD) of polyvinyl alcohol (PVA), sonication power and time, composition of organic phase, initial concentration of calcium phosphate and calcium (Ca) to phosphate ion (P) ratio (Ca/P ratio), etc. The CaPi-pDNA-PLGA-NPs made according to the optimal formulation were spherical in shape observed by transmission electron microscopy (TEM) with a mean particle size of 207±5 nm and an entrapment efficiency of 95.7±0.8%. Differential scanning calorimetry (DSC) suggested that there existed interaction between the DNA-calcium-phosphate (CaPi-pDNA) complexes and the polymeric matrices of PLGA. X-ray diffractometry (XRD) further proved the conclusion and indicated that the CaPi-pDNA was in weak crystallization form inside the nanoparticles. The Brunauer-Emmett-Teller (BET) surface area measurement demonstrated that the CaPi-pDNA-PLGA-NPs are mesoporous with specific surface area of 57.5m(2)/g and an average pore size of 96.5 Å. The transfection efficiency of the CaPi-pDNA-PLGA-NPs on human embryonic kidney 293 (HEK 293) cells in vitro was 22.4±1.2%, which was much higher than those of both the pDNA loaded PLGA nanoparticles (pDNA-PLGA-NPs) and the CaPi-pDNA embedded PLGA microparticles (CaPi-pDNA-PLGA-MPs). The CaPi-pDNA-PLGA-NPs are promising vectors for gene delivery.
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Affiliation(s)
- Jie Tang
- College of Pharmacy, State Key Laboratory of Biotherapy, Sichuan University, No. 17, Section 3, Renmin Nan Road, Chengdu 610041, PR China
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12
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Zhou R, Huang WJ, Guo ZY, Li L, Zeng XR, Deng YQ, Hu FY, Tong AP, Yang L, Yang JL. Molecular mechanism of hepatocellular carcinoma-specific antitumor activity of the novel thienopyridine derivative TP58. Oncol Rep 2012; 28:225-31. [PMID: 22552608 DOI: 10.3892/or.2012.1776] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2012] [Accepted: 03/05/2012] [Indexed: 02/05/2023] Open
Abstract
Despite progress made in the treatment of hepatocellular carcinoma (HCC), there is no curable treatment. Novel therapies are therefore needed. In our previous study on the design and synthesis of a small molecular inhibitor targeting Aurora kinase, we discovered a novel thienopyridine derivative compound (1g, TP58) which displayed the most potent and relatively specific inhibition of the proliferation of HepG2 human hepatoma cells in vitro. However, the molecular mechanism remains to be elucidated. Herein, in vitro and in vivo studies were conducted to further verify its antitumor activity against HCC. cDNA microarray and two-dimensional protein gel electrophoresis technology were utilized to elucidate the mechanism of HCC-specific inhibition of TP58. Flow cytometry analysis displayed that TP58 can significantly induce G0/G1 arrest in HepG2 cells. Sixteen genes involved in cell cycle regulation were found to be dysregulated following TP58 treatment using microarray technology. Nine proteins whose expression was altered (corresponding to 10 spots identified as differentially expressed) were identified by proteomic analysis. Further study showed that TP58 can modulate the expression of some liver-enriched transcription factors (LETFs) and liver-specific marker genes, such as hepatic nuclear factor (HNF-4) and α-fetoprotein (AFP). These findings may help explain the mechanism of HCC-specific antitumor activity of TP58 and provide some useful insight for anti-HCC drug design and future use of thienopyridine derivatives in HCC therapy.
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Affiliation(s)
- Rui Zhou
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University, Chengdu 610041, PR China
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13
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Huang WJ, Zhou R, Zeng XR, Tan XQ, Cheng ZH, Tang MH, Gou LT, Chen LJ, Tong AP, He Y, Yang JL. Comparative proteomic analysis of atrial appendages from rheumatic heart disease patients with sinus rhythm and atrial fibrillation. Mol Med Rep 2011; 4:655-61. [PMID: 21468545 DOI: 10.3892/mmr.2011.468] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2010] [Accepted: 03/22/2011] [Indexed: 11/06/2022] Open
Abstract
Atrial fibrillation (AF) is the most common form of arrhythmia encountered in clinical practice, and contributes to cardiovascular morbidity and mortality. Despite significant advances in the understanding of the mechanisms associated with AF, the number of effective biomarkers and viable therapeutic targets remains relatively limited. In this study, 2-DE and MS/MS analysis was used to identify differentially expressed proteins in human atrial appendage tissues from patients with AF (n=4) compared to controls with sinus rhythm (SR; n=5). All subjects had rheumatic heart disease. Following 2-DE analysis, Coomassie Brilliant Blue staining and MS/MS identification, a total of 19 protein spots were found to be differentially expressed between the AF and SR groups. By cluster and metabolic/signaling pathway analysis, these proteins were divided into three major groups: proteins involved in the cytoskeleton and myofilament, energy metabolism associated proteins, and proteins associated with oxidative stress. The proteins identified in this study may enable a better understanding of the molecular mechanisms of AF, and may provide useful biomarkers and novel targets for drug development.
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Affiliation(s)
- Wen-Jun Huang
- State Key Laboratory of Biotherapy and Cancer Center, West China Medical School, Sichuan University, Chengdu, People's Republic of China
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14
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Zeng XX, Zheng RL, Zhou T, He HY, Liu JY, Zheng Y, Tong AP, Xiang ML, Song XR, Yang SY, Yu LT, Wei YQ, Zhao YL, Yang L. Novel thienopyridine derivatives as specific anti-hepatocellular carcinoma (HCC) agents: Synthesis, preliminary structure–activity relationships, and in vitro biological evaluation. Bioorg Med Chem Lett 2010; 20:6282-5. [PMID: 20846862 DOI: 10.1016/j.bmcl.2010.08.088] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2010] [Revised: 07/27/2010] [Accepted: 08/18/2010] [Indexed: 10/19/2022]
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Gou LT, Tong AP, Yan F, Yuan Z, He F, Wang W, Zhou Y, Chen LJ, Tang MH, Yang JL. Altered protein-expressing profile in hPNAS4-induced apoptosis in A549 human lung adenocarcinoma cells. J Cell Biochem 2010; 108:1211-9. [PMID: 19795389 DOI: 10.1002/jcb.22353] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Human PNAS4 (hPNAS4) is a recently identified pro-apoptosis gene, which is able to induce apoptosis in A549 human lung adenocarcinoma cells following its overexpression. In this work, we investigated the changes of protein profile in hPNAS4-induced apoptosis in A549 cells through proteomic strategy consisting of two-dimensional electrophoresis (2-DE) coupled with MALDI-Q-TOF mass spectrometry. A total of 20 different proteins with more than 3.0-fold change in expression, including 5 up-regulated and 15 down-regulated proteins were successfully identified by database search. The mRNA transcription levels of the different proteins were further examined by RT-PCT. Functional analyses showed these different proteins are involved in diverse biological processes including metabolism, proteolysis, signal transduction, apoptosis, and redox regulation. Two essential apoptosis-associated protein, annexin A1 and prothymosin alpha, were confirmed by Western blot and showed consistent changes with proteomic detection. Our data provide molecular evidence and possible associated pathway in hPNAS4-induced apoptosis through proteomic strategy, which should be contributed to further investigation on biological function of hPNAS4.
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Affiliation(s)
- Lan-Tu Gou
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University, Chengdu 610041, Sichuan Province, China
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Gou LT, Tong AP, Chen LJ, Tang MH, Chen B, Liang SF, Huang C, Wei YQ. Comparative plasma membrane-associated proteomics of immortalized human hepatocytes. Biochemistry (Mosc) 2009; 73:1200-6. [PMID: 19120023 DOI: 10.1134/s0006297908110059] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
This work was initiated with the purpose of purifying and identifying differentially expressed plasma membrane-associated proteins between human liver cancer cell line HepG2 and normal liver cell line L02. The combined strategy of sucrose density gradient centrifugation and subsequent phase partition was applied to obtain high-purity proteins of plasma membrane. Two-dimensional gel electrophoresis revealed the differential protein profile between the two cell lines. A total of 13 plasma membrane-associated proteins containing 10 up-regulated proteins and three down-regulated proteins in HepG2 cells were successfully identified by MALDI-Q-TOF mass spectrometry; they participate in multiple biological functions such as adhesion, proliferation, apoptosis, and signal transduction. The identified proteins could provide helpful reference in clinical investigations on potential candidates for diagnosis and therapy of liver cancer.
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Affiliation(s)
- Lan-Tu Gou
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University, Chengdu, 610041, China
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Zhang P, Wang CT, Yan F, Gou L, Tong AP, Cai F, Li Q, Deng HX, Wei YQ. Prokaryotic expression of a novel mouse pro-apoptosis protein PNAS-4 and application of its polyclonal antibodies. Braz J Med Biol Res 2009; 41:504-11. [PMID: 18622494 DOI: 10.1590/s0100-879x2008000600012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2008] [Accepted: 05/26/2008] [Indexed: 02/05/2023] Open
Abstract
Mouse PNAS-4 (mPNAS-4) has 96% identity with human PNAS-4 (hPNAS-4) in primary sequence and has been reported to be involved in the apoptotic response to DNA damage. However, there have been no studies reported of the biological functions of mPNAS-4. In studies conducted by our group (unpublished data), it was interesting to note that overexpression of mPNAS-4 promoted apoptotic death in Lewis lung carcinoma cells (LL2) and colon carcinoma cells (CT26) of mice both in vitro and in vivo. In our studies, mPNAS-4 was cloned into the pGEX-6P-1 vector with GST tag at N-terminal in Escherichia coli strain BL21(DE3). The soluble and insoluble expression of recombinant protein mPNAS-4 (rmPNAS-4) was temperature-dependent. The majority of rmPNAS-4 was insoluble at 37 degrees C, while it was almost exclusively expressed in soluble form at 20 degrees C. The soluble rmPNAS-4 was purified by one-step affinity purification, using a glutathione Sepharose 4B column. The rmPNAS-4 protein was further identified by electrospray ionization-mass spectrometry analysis. The search parameters of the parent and fragment mass error tolerance were set at 0.1 and 0.05 kDa, respectively, and the sequence coverage of search result was 28%. The purified rmPNAS-4 was further used as immunogen to raise polyclonal antibodies in New Zealand white rabbit, which were suitable to detect both the recombinant and the endogenous mPNAS-4 in mouse brain tissue and LL2 cells after immunoblotting and/or immunostaining. The purified rmPNAS-4 and our prepared anti-mPNAS-4 polyclonal antibodies may provide useful tools for future biological function studies for mPNAS.
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Affiliation(s)
- P Zhang
- State Key Laboratory of Biotherapy, West China Hospital, West China Medical School, Sichuan University, Chengdu, Sichuan, China
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Yang T, Zhang L, Yan F, Tong AP, Liu XY, Liu HY, Huang CH. [Mechanism study of antisense cyclin B1 in tumorigenesis inhibition using proteomic technique]. Ai Zheng 2007; 26:264-9. [PMID: 17355788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
BACKGROUND & OBJECTIVE Previous researches showed that down-regulating the expression of cyclin B1 in tumor cells by RNA interference may inhibit tumorigenesis, but the mechanism remains to be clarified. This study was to reveal the molecular mechanism of antisense cyclin B1 in tumorigenesis inhibition by comparative proteomic technique. METHODS A recombinant plasmid containing the full-length antisense cDNA of mouse cyclin B1 was transfected into mouse colon carcinoma cell line CT26. Total proteins of transfected cells and control cells were extracted and separated by two-dimensional gel electrophoresis (2-DE). The differential expression proteins were analyzed with PDQuest software, and identified using matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF-MS) and Mascot database searching. The 2 differential proteins with the highest confidence of the peptides were selected and verified by Western blot. RESULTS Seven differentially expressed proteins were identified: Axin2, CCTtheta, DR5, and HPCM27 were up-regulated in transfected cells, while RFP17, mKIAA1195, and LOC77035 were down-regulated. The expression abundance differences of Axin2 and DR5, with the highest confidence, were verified by Western blot. CONCLUSIONS Several proteins expressed differentially in CT26 cells after transfection of antisense cyclin B1, which take part in some signal pathways in cell proliferation, differentiation, migration, apoptosis, and transcriptional control. The antitumor effect of antisense cyclin B1 may relate to the interplay of the above proteins.
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Affiliation(s)
- Tao Yang
- State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan, PR. China.
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