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Wu Y, Bei Y, Li W, Lu W, Zhu J, Zhang Z, Zhang T, Liu S, Chen K, Jin H, Li L, Li M, Gao J, Pan X. Advanced Multifunctional Hydrogels for Enhanced Wound Healing through Ultra-Fast Selenol-S NAr Chemistry. Adv Sci (Weinh) 2024:e2400898. [PMID: 38647422 DOI: 10.1002/advs.202400898] [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] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 03/26/2024] [Indexed: 04/25/2024]
Abstract
Fabrication of versatile hydrogels in a facile and effective manner represents a pivotal challenge in the field of biomaterials. Herein, a novel strategy is presented for preparing on-demand degradable hydrogels with multilevel responsiveness. By employing selenol-dichlorotetrazine nucleophilic aromatic substitution (SNAr) to synthesize hydrogels under mild conditions in a buffer solution, the necessity of additives or posttreatments can be obviated. The nucleophilic and redox reactions between selenol and tetrazine culminate in the formation of three degradable chemical bonds-diselenide, aryl selenide, and dearomatized selenide-in a single, expeditious step. The resultant hydrogel manifests exceptional adaptability to intricate environments in conjunction with self-healing and on-demand degradation properties. Furthermore, the resulting material demonstrated light-triggered antibacterial activity. Animal studies further underscore the potential of integrating metformin into Se-Tz hydrogels under green light irradiation, as it effectively stimulates angiogenesis and collagen deposition, thereby fostering efficient wound healing. In comparison to previously documented hydrogels, Se-Tz hydrogels exhibit controlled degradation and drug release, outstanding antibacterial activity, mechanical robustness, and bioactivity, all without the need for costly and intricate preparation procedures. These findings underscore Se-Tz hydrogels as a safe and effective therapeutic option for diabetic wound dressings.
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Affiliation(s)
- Yan Wu
- College of Life Science, Mudanjiang Medical University, Mudanjiang, 157011, China
| | - Ying Bei
- College of Life Science, Mudanjiang Medical University, Mudanjiang, 157011, China
- Hainan Academy of Medical Sciences, Hainan Medical University, Hainan, 571199, China
| | - Wenjing Li
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
| | - Weihong Lu
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
| | - Jian Zhu
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
| | - Zhengbiao Zhang
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
| | - Tinglin Zhang
- Changhai Clinical Research Unit, Shanghai Changhai Hospital, Naval Medical University, Shanghai, 200433, China
| | - Sen Liu
- College of Life Science, Mudanjiang Medical University, Mudanjiang, 157011, China
| | - Kaiyuan Chen
- College of Life Science, Mudanjiang Medical University, Mudanjiang, 157011, China
| | - Hong Jin
- College of Life Science, Mudanjiang Medical University, Mudanjiang, 157011, China
| | - Luxin Li
- College of Life Science, Mudanjiang Medical University, Mudanjiang, 157011, China
| | - Meng Li
- Department of Dermatology Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200010, China
| | - Jie Gao
- Changhai Clinical Research Unit, Shanghai Changhai Hospital, Naval Medical University, Shanghai, 200433, China
- Shanghai Key Laboratory of Nautical Medicine and Translation of Drugs and Medical Devices, Shanghai, 200433, China
| | - Xiangqiang Pan
- College of Life Science, Mudanjiang Medical University, Mudanjiang, 157011, China
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
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Li W, Bei Y, Pan X, Zhu J, Zhang Z, Zhang T, Liu J, Wu D, Li M, Wu Y, Gao J. Selenide-linked polydopamine-reinforced hybrid hydrogels with on-demand degradation and light-triggered nanozyme release for diabetic wound healing. Biomater Res 2023; 27:49. [PMID: 37202774 DOI: 10.1186/s40824-023-00367-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [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: 01/14/2023] [Accepted: 03/21/2023] [Indexed: 05/20/2023] Open
Abstract
BACKGROUND Multifunctional hydrogels with controllable degradation and drug release have attracted extensive attention in diabetic wound healing. This study focused on the acceleration of diabetic wound healing with selenide-linked polydopamine-reinforced hybrid hydrogels with on-demand degradation and light-triggered nanozyme release. METHODS Herein, selenium-containing hybrid hydrogels, defined as DSeP@PB, were fabricated via the reinforcement of selenol-end capping polyethylene glycol (PEG) hydrogels by polydopamine nanoparticles (PDANPs) and Prussian blue nanozymes in a one-pot approach in the absence of any other chemical additive or organic solvent based on diselenide and selenide bonding-guided crosslinking, making them accessible for large-scale mass production. RESULTS Reinforcement by PDANPs greatly increases the mechanical properties of the hydrogels, realizing excellent injectability and flexible mechanical properties for DSeP@PB. Dynamic diselenide introduction endowed the hydrogels with on-demand degradation under reducing or oxidizing conditions and light-triggered nanozyme release. The bioactivity of Prussian blue nanozymes afforded the hydrogels with efficient antibacterial, ROS-scavenging and immunomodulatory effects, which protected cells from oxidative damage and reduced inflammation. Further animal studies indicated that DSeP@PB under red light irradiation showed the most efficient wound healing activity by stimulating angiogenesis and collagen deposition and inhibiting inflammation. CONCLUSION The combined merits of DSeP@PB (on-demand degradation, light-triggered release, flexible mechanical robustness, antibacterial, ROS-scavenging and immunomodulatory capacities) enable its high potential as a new hydrogel dressing that can be harnessed for safe and efficient therapeutics for diabetic wound healing.
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Affiliation(s)
- Wenjing Li
- Changhai Clinical Research Unit, Shanghai Changhai Hospital, Naval Medical University, Shanghai, 200433, China
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
| | - Ying Bei
- College of Life Science, Mudanjiang Medical University, Mudanjiang, 157011, China
| | - Xiangqiang Pan
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China.
| | - Jian Zhu
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
| | - Zhengbiao Zhang
- Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
| | - Tinglin Zhang
- Changhai Clinical Research Unit, Shanghai Changhai Hospital, Naval Medical University, Shanghai, 200433, China
| | - Jieting Liu
- College of Life Science, Mudanjiang Medical University, Mudanjiang, 157011, China
| | - Dan Wu
- College of Life Science, Mudanjiang Medical University, Mudanjiang, 157011, China
| | - Meng Li
- Department of Dermatology, Shanghai Ninth People?s Hospital, Shanghai Jiaotong University, Shanghai, 200010, China.
| | - Yan Wu
- College of Life Science, Mudanjiang Medical University, Mudanjiang, 157011, China.
| | - Jie Gao
- Changhai Clinical Research Unit, Shanghai Changhai Hospital, Naval Medical University, Shanghai, 200433, China.
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Zhu Y, Cui H, Zhang J, Bei Y, Huang Y, Li M, Liu J, Wu Y, Gao J. Application of Cell Membrane-Coated Nanomaterials for Tumor Treatment. Mini Rev Med Chem 2023; 23:1535-1559. [PMID: 36740792 DOI: 10.2174/1389557523666230203145645] [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: 07/22/2022] [Revised: 11/07/2022] [Accepted: 11/22/2022] [Indexed: 02/07/2023]
Abstract
Tumors are a major cause of human mortality worldwide, and the rapid development of nanomaterials (NMs) for tumor therapy and drug delivery has provided new treatment methods. However, NMs' high immunogenicity, short circulation time, and low specificity limit their application in tumor therapy. In recent years, bionanomaterials using cell membranes have emerged to overcome the shortcomings of monomeric NMs. Cell membrane-encapsulated NMs extracted from multiple cells not only retain the physicochemical properties of NMs but also inherit the biological functions of the source cells, aiding in drug delivery. The combination of the cell membrane and drug-loading NMs offers an efficient and targeted drug delivery system tailored to the tumor microenvironment. The research and application of this method have been widely carried out in the academic field of tumor diagnosis and treatment. This review presents the recent research progress of cell membrane-coated NMs as drug carriers in tumor therapy, including cell membrane extraction methods, encapsulation strategies, and the applications of cell membrane-encapsulated NMs in tumor therapy. We believe that biomimetic nanomaterials will be a promising and novel anticancer strategy in the future, and their wide application will certainly bring vitality to the field of tumor diagnosis and treatment. The combination of membrane and drug-loading nanomaterials embodies a highly efficient and target drug delivery system tailored to the tumor microenvironment, which broadens a new path of drug delivery for future cancer treatment. Meanwhile, it is also a perfect combination and application of biomedical nanomaterials, which is of great significance.
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Affiliation(s)
- Yanzhao Zhu
- Heilongjiang Key Laboratory of Anti-fibrosis Biotherapy, College of Life Sciences, Mudanjiang Medicai University, Mudanjiang, China
| | - Hengqing Cui
- Department of Burns and Plastic Surgery, Shanghai Changzheng Hospital, Shanghai, China
| | - Jin Zhang
- Heilongjiang Key Laboratory of Anti-fibrosis Biotherapy, College of Life Sciences, Mudanjiang Medicai University, Mudanjiang, China
| | - Ying Bei
- Heilongjiang Key Laboratory of Anti-fibrosis Biotherapy, College of Life Sciences, Mudanjiang Medicai University, Mudanjiang, China
| | - Yu Huang
- Heilongjiang Key Laboratory of Anti-fibrosis Biotherapy, College of Life Sciences, Mudanjiang Medicai University, Mudanjiang, China
| | - Meiyun Li
- Heilongjiang Key Laboratory of Anti-fibrosis Biotherapy, College of Life Sciences, Mudanjiang Medicai University, Mudanjiang, China
| | - Jieting Liu
- Heilongjiang Key Laboratory of Anti-fibrosis Biotherapy, College of Life Sciences, Mudanjiang Medicai University, Mudanjiang, China
| | - Yan Wu
- Heilongjiang Key Laboratory of Anti-fibrosis Biotherapy, College of Life Sciences, Mudanjiang Medicai University, Mudanjiang, China
| | - Jie Gao
- Changhai Clinical Research Unit, Shanghai Changhai Hospital, Naval Medical University, Shanghai, China
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Bei Y, Lu D, Meng X, Zhu Y, Liang X, Xiao J. P5399microRNA-486 mediates exercise-induced cardiac growth and prevents cardiac ischemia-reperfusion injury. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz746.0359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Molecules mediating exercise-induced physiological cardiac growth may be beneficial to prevent cardiac injury and remodeling. MicroRNA-486 (miR-486) is a muscle-enriched microRNA which was found to be increased in exercised heart. However, the role of miR-486 in exercise-induced cardiac growth is largely unknown.
Purpose
We aimed to study the function of miR-486 in exercise-induced cardiac growth, and to investigate its potential role in protection against cardiac ischemia/reperfusion (I/R) injury.
Methods
Male C57BL/6 adult mice were subjected to 3-week swimming exercise to induce physiological cardiac growth. Knockdown of miR-486 was performed by intramyocardial injection of miR-486 sponge to evaluate the role of miR-486 in exercise-induced cardiac growth. Moreover, intramyocardial injection of miR-486 overexpression lentivirus was performed to investigate whether miR-486 could reduce infarct size in mice suffered from acute I/R injury (30 min ligation and 24 hr reperfusion of left anterior descending coronary artery). Meanwhile, the functional role of miR-486 was evaluated in neonatal rat cardiomyocytes (NRCMs) treated with oxygen glucose deprivation/reperfusion (OGDR) using Tunel staining. Finally, function-rescue assays were performed to identify target genes of miR-486.
Results
Exercise significantly upregulated miR-486 in the heart, which was reduced by intramyocardial injection of miR-486 sponge. Exercise induced-cardiac growth was abolished in mice with intramyocardial injection of miR-486 sponge, as evidenced by reduced heart weight/body weight ratio and heart weight/tibia length ratio compared to control exercised-mice, suggesting a potential role of miR-486 in mediating exercise-induced cardiac growth. Meanwhile, we found that intramyocardial injection of miR-486 overexpression lentivirus was able to reduce the infarct size as determined by TTC staining. Moreover, in OGDR-induced apoptosis of NRCMs, miR-486 mimics was able to reduce cardiomyocyte apoptosis, while miR-486 inhibitor performed the opposite. Finally, PTEN and FoxO1 were identified as target genes of miR-486 in the control of cardiomyocyte apoptosis.
Conclusions
miR-486 mediates exercise-induced cardiac growth and protects against cardiac I/R injury. Increasing miR-486 might serve as a potential target to reduce myocardial apoptosis upon I/R injury.
Acknowledgement/Funding
This work was supported by the grants from National Natural Science Foundation of China 81722008, 91639101 and 81570362 to JJ Xiao, 81770401 to Y Bei
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Affiliation(s)
- Y Bei
- Shanghai University Institute of Cardiovascular Sciences, Shanghai, China
| | - D Lu
- Shanghai University Institute of Cardiovascular Sciences, Shanghai, China
| | - X Meng
- Shanghai University Institute of Cardiovascular Sciences, Shanghai, China
| | - Y Zhu
- Shanghai University Institute of Cardiovascular Sciences, Shanghai, China
| | - X Liang
- Shanghai University Institute of Cardiovascular Sciences, Shanghai, China
| | - J Xiao
- Shanghai University Institute of Cardiovascular Sciences, Shanghai, China
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Li X, Geng S, Zhang Z, Zhang J, Li W, Huang J, Lin W, Bei Y, Lu Y. Species-specific aggregation pheromones contribute to coexistence in two closely related thrips species. Bull Entomol Res 2019; 109:119-126. [PMID: 29781420 DOI: 10.1017/s0007485318000366] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [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: 06/08/2023]
Abstract
Pheromones play an important role in mediating interspecific interactions in insects. In an insect community, pheromones can reveal information about the senders, which could be used by other members of the food web (competitor, natural enemies, etc.) to their own advantage. The aggregation pheromones of two closely related thrips species, Frankliniella occidentalis and Frankliniella intonsa, have been identified with the same major compounds, (R)-lavandulyl acetate and neryl (S)-2-methylbutanoate, but in different ratios. However, the roles of the aggregation pheromones in the interspecific interactions between these two closely related species are unknown. Here, we investigated the roles of major aggregation pheromone compounds in interspecific interactions between F. occidentalis and F. intonsa for both long and short ranges. The results showed that, at tested doses, neither aggregation pheromone-induced long range cross-attraction nor short range cross-mating was detected between F. occidentalis and F. intonsa. Field-trapping trials showed that the species-specificity in aggregation pheromones was regulated by the ratio of two major compounds. However, species-specific blends of the two major compounds had no effect on short-range interactions between these two species. Our data from the thrips species provide support for the 'aggregation model of coexistence', explaining the species-specific pheromone-mediated coexistence of closely related species. Thus, species-specific pheromones could be one of the factors affecting population dynamics and community structure in closely related insects with similar niches.
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Affiliation(s)
- X Li
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control,Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences,Hangzhou, Zhejiang 310021,China
| | - S Geng
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control,Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences,Hangzhou, Zhejiang 310021,China
| | - Z Zhang
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control,Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences,Hangzhou, Zhejiang 310021,China
| | - J Zhang
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control,Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences,Hangzhou, Zhejiang 310021,China
| | - W Li
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control,Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences,Hangzhou, Zhejiang 310021,China
| | - J Huang
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control,Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences,Hangzhou, Zhejiang 310021,China
| | - W Lin
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control,Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences,Hangzhou, Zhejiang 310021,China
| | - Y Bei
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control,Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences,Hangzhou, Zhejiang 310021,China
| | - Y Lu
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control,Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences,Hangzhou, Zhejiang 310021,China
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Bei Y, Meng X, Fu S, Wang L, Xiao J. 4931microRNA-210 is necessary for exercise-induced cardiomyocyte proliferation and mediates the benefical effect of exercise against cardiac ischemia-reperfusion injury. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.4931] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Y Bei
- Shanghai University, Cardiac Regeneration and Ageing Lab, Shanghai, China People's Republic of
| | - X Meng
- Shanghai University, Cardiac Regeneration and Ageing Lab, Shanghai, China People's Republic of
| | - S Fu
- Shanghai University, Cardiac Regeneration and Ageing Lab, Shanghai, China People's Republic of
| | - L Wang
- Second Medical School of Nanjing University of Chinese Medicine, Department of Rehabilitation Medicine, Nanjing, China People's Republic of
| | - J Xiao
- Shanghai University, Cardiac Regeneration and Ageing Lab, Shanghai, China People's Republic of
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Li J, Bei Y, Wang F, Li Y, Xiao J. 4933PPAR gamma mediates angiotensin II-induced muscle atrophy by increasing miR-29b. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.4933] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- J Li
- Shanghai University, Cardiac Regeneration and Ageing Lab, Shanghai, China People's Republic of
| | - Y Bei
- Shanghai University, Cardiac Regeneration and Ageing Lab, Shanghai, China People's Republic of
| | - F Wang
- Tongji Hospital affiliated to Tongji University, Division of Gastroenterology and Hepatology, Shanghai, China People's Republic of
| | - Y Li
- Shanghai University, Cardiac Regeneration and Ageing Lab, Shanghai, China People's Republic of
| | - J Xiao
- Shanghai University, Cardiac Regeneration and Ageing Lab, Shanghai, China People's Republic of
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8
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Zhou Q, Liu Z, Bei Y, Zhang Z, Zhou L, Xiao J. P4751Suppression of miR-127-3p prevents cardiac fibrosis. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p4751] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Q Zhou
- Shanghai University, Cardiac Regeneration and Ageing Lab, Shanghai, China People's Republic of
| | - Z Liu
- Jiangsu Provincial People's Hospital, Department of Cardiology, Nanjing, China People's Republic of
| | - Y Bei
- Shanghai University, Cardiac Regeneration and Ageing Lab, Shanghai, China People's Republic of
| | - Z Zhang
- Shanghai University, Cardiac Regeneration and Ageing Lab, Shanghai, China People's Republic of
| | - L Zhou
- Jiangsu Provincial People's Hospital, Department of Cardiology, Nanjing, China People's Republic of
| | - J Xiao
- Shanghai University, Cardiac Regeneration and Ageing Lab, Shanghai, China People's Republic of
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9
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Zhigang Y, Jianmei L, Xinjin Z, Qing L, Bei Y, Zhidong C, Jun G. Clinical study about effect of amlodipine with compound amiloride or telmisartan on non-invasive central aortic blood pressure and vascular function. Heart 2011. [DOI: 10.1136/heartjnl-2011-300867.327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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10
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Gu X, Bei Y, Gao C, Chen H. [Population growth, distribution pattern and sampling technique of Thrips palmi on eggplant]. Ying Yong Sheng Tai Xue Bao 2000; 11:866-8. [PMID: 11767560] [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: 02/23/2023]
Abstract
Population growth of Thrips palmi Karny on eggplant (Solanum melongena L.) were analyzed by mathematical models. The rate of population increase (r) of the adults and immature (instars 1-2) T. palmi were estimated to be 0.0630 and 0.0801 respectively in the open fields, and 0.0983 and 0.1036 respectively in the greenhouse. K value of logistic curve of T. palmi was estimated to be 33.90 in the greenhouse, and 23.50 in the open fields. The relationship between mean crowding (M*) and mean density (M) of T. palmi per eggplant leaf were estimated by Iwao's M*-M regression. The regression equation of adult and immature T. palmi on eggplant were: M* = 0.6011 + 1.468M and M* = 7.2515 + 2.064M respectively. The regression equation of the number of adult and immature was M* = 7.5138 + 1.9119M. When the population density of the adults and immature T. palmi per eggplant leaf were 10 to 100, the number of sampling should be 78 to 44.
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Affiliation(s)
- X Gu
- Institute of Plant Protection, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021
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11
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Shin TH, Yasuda J, Rocheleau CE, Lin R, Soto M, Bei Y, Davis RJ, Mello CC. MOM-4, a MAP kinase kinase kinase-related protein, activates WRM-1/LIT-1 kinase to transduce anterior/posterior polarity signals in C. elegans. Mol Cell 1999; 4:275-80. [PMID: 10488343 DOI: 10.1016/s1097-2765(00)80375-5] [Citation(s) in RCA: 105] [Impact Index Per Article: 4.2] [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: 11/15/2022]
Abstract
In C. elegans, a Wnt/WG-like signaling pathway down-regulates the TCF/LEF-related protein, POP-1, to specify posterior cell fates. Effectors of this signaling pathway include a beta-catenin homolog, WRM-1, and a conserved protein kinase, LIT-1. WRM-1 and LIT-1 form a kinase complex that can directly phosphorylate POP-1, but how signaling activates WRM-1/LIT-1 kinase is not yet known. Here we show that mom-4, a genetically defined effector of polarity signaling, encodes a MAP kinase kinase kinase-related protein that stimulates the WRM-1/LIT-1-dependent phosphorylation of POP-1. LIT-1 kinase activity requires a conserved residue analogous to an activating phosphorylation site in other kinases, including MAP kinases. These findings suggest that anterior/posterior polarity signaling in C. elegans may involve a MAP kinase-like signaling mechanism.
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Affiliation(s)
- T H Shin
- University of Massachusetts Medical School, Program in Molecular Medicine, Worcester 01605, USA
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12
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Rocheleau CE, Downs WD, Lin R, Wittmann C, Bei Y, Cha YH, Ali M, Priess JR, Mello CC. Wnt signaling and an APC-related gene specify endoderm in early C. elegans embryos. Cell 1997; 90:707-16. [PMID: 9288750 DOI: 10.1016/s0092-8674(00)80531-0] [Citation(s) in RCA: 520] [Impact Index Per Article: 19.3] [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: 02/05/2023]
Abstract
In a 4-cell stage C. elegans embryo, signaling by the P2 blastomere induces anterior-posterior polarity in the adjacent EMS blastomere, leading to endoderm formation. We have taken genetic and reverse genetic approaches toward understanding the molecular basis for this induction. These studies have identified a set of genes with sequence similarity to genes that have been shown to be, or are implicated in, Wnt/Wingless signaling pathways in other systems. The C. elegans genes described here are related to wnt/wingless, porcupine, frizzled, beta-catenin/armadillo, and the human adenomatous polyposis coli gene, APC. We present evidence that there may be partially redundant inputs into endoderm specification and that a subset of these genes appear also to function in determining cytoskeletal polarity in certain early blastomeres.
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Affiliation(s)
- C E Rocheleau
- Department of Cell Biology, Program in Molecular Medicine, University of Massachusetts Cancer Center, Worcester 01605, USA
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13
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Bei Y. Clinical observations on the treatment of 98 cases of peptic ulcer by massage. J TRADIT CHIN MED 1993; 13:50-1. [PMID: 8501962] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Y Bei
- Department of Acupuncture and Massage, Fujian College of Traditional Chinese Medicine, Fuzhou
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