1
|
Li X, Song J, Tan J, Zhang D, Guan Y, Geng F, Yang M, Pei J, Ma H. "Plant Golden" C. sativus: Qualitative and quantitative analysis of major components in stigmas and petals and their biological activity in vitro. J Pharm Biomed Anal 2024; 243:116115. [PMID: 38513497 DOI: 10.1016/j.jpba.2024.116115] [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: 01/02/2024] [Revised: 02/19/2024] [Accepted: 03/15/2024] [Indexed: 03/23/2024]
Abstract
Crocus sativus L. (C. sativus) has its stigma as the main valuable part used. With extremely low production and high prices, stigma is considered a scarce resource. As a result, its petals, considered as by-products, are often discarded, leading to significant waste. We developed a UPLC-Q-Orbitrap HRMS method for qualitative analysis of stigmas and petals and a UHPLC-QQQ-MS/MS method for simultaneous quantification of 9 characteristic active compounds for the first time, and compared their biological activity in vitro. The results indicated that a total of 63 compounds were identified in the petals and stigmas. The content of flavonoids in the petals was significantly superior to that in the stigma, and the content of quercetin in the petals was 50 times higher than that in the stigma. The results of the in vitro evaluation of biological activity indicated that both the petals (•OH: IC50=39.70 mg/mL; DPPH: IC50=28.37 mg/mL; ABTS: IC50=0.9868 mg/mL)and stigma (•OH: IC50=34.41 mg/mL; DPPH: IC50=38.99 mg/mL; ABTS: IC50=3.194 mg/mL)demonstrated comparable antioxidant activities. However, the tyrosinase inhibitory activity in petals (IC50=21.17 mg/mL) was weaker than that in stigma(IC50=1.488 mg/mL). This study provides a fast, reliable, and efficient analytical method that can be used for the quality assessment of petals as a natural resource and its related products in the food and pharmaceutical industries.
Collapse
Affiliation(s)
- Xue Li
- State Key Laboratory of Southwestern Chinese Medicine Resources, Pharmacy School, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Jiao Song
- State Key Laboratory of Southwestern Chinese Medicine Resources, Pharmacy School, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Jin Tan
- Gooddoctor Pharmaceutical Group Co.,Ltd., Chengdu, Sichuan 610073, China
| | - Dingkun Zhang
- State Key Laboratory of Southwestern Chinese Medicine Resources, Pharmacy School, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Yongmei Guan
- State key Laboratory of Innovation Medicine and High Efficiency and Energy Saving Pharmaceutical Equipment, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China
| | - Funeng Geng
- Gooddoctor Pharmaceutical Group Co.,Ltd., Chengdu, Sichuan 610073, China
| | - Ming Yang
- State key Laboratory of Innovation Medicine and High Efficiency and Energy Saving Pharmaceutical Equipment, Jiangxi University of Traditional Chinese Medicine, Nanchang 330004, China
| | - Jin Pei
- State Key Laboratory of Southwestern Chinese Medicine Resources, Pharmacy School, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Hongyan Ma
- State Key Laboratory of Southwestern Chinese Medicine Resources, Pharmacy School, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| |
Collapse
|
2
|
Rao J, Li H, Zhang H, Xiang X, Ding X, Li L, Geng F, Qi H. Periplaneta Americana (L.) extract activates the ERK/CREB/BDNF pathway to promote post-stroke neuroregeneration and recovery of neurological functions in rats. J Ethnopharmacol 2024; 321:117400. [PMID: 37952730 DOI: 10.1016/j.jep.2023.117400] [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] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 10/26/2023] [Accepted: 11/06/2023] [Indexed: 11/14/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Periplaneta americana (L.) (PA) has been used in traditional Chinese medicine for thousands of years for the effect of invigorating blood circulation and removing blood stasis. Modern pharmacological research shown that PA extract exhibits promising effects in promoting wound healing and regeneration, as well as in brain diseases such as Parkinson's disease (PD). However, whether it is effective for neuroregeneration and neurological function recovery after stroke still unknown. AIM OF THE STUDY This study aims to investigate the potential effect of PA extract to promote brain remodeling through the activation of endogenous neurogenesis and angiogenesis, in addition, preliminary exploration of its regulatory mechanism. METHODS Firstly, BrdU proliferation assay and immunofluorescence (IF) staining were used to evaluate the effect of PA extract on the neurogenesis and angiogenesis in vitro and in vivo. Subsequently, the effects of PA extract on brain injury in stroke rats were assessed by TTC and HE. While mNSS score, adhesive removal test, rota-rod test, and morris water maze test were used to assess the impact of PA extract on neurological function in post-stroke rats. Finally, the molecular mechanisms of PA extract regulation were explored by RNA-Seq and western blotting. RESULTS The number of BrdU+ cells in C17.2 cells, NSCs and BMECs dramatically increased, as well as the expression of astrocyte marker protein GFAP and neuronal marker protein Tuj-1 in C17.2 and NSCs. Moreover, PA extract also increased the number of BrdU+DCX+, BrdU+GFAP+, BrdU+CD31+ cells in the SGZ area of transient middle cerebral artery occlusion model (tMCAO) rats. TTC and HE staining revealed that PA extract significantly reduced the infarction volume and ameliorated the pathological damage. Behavioral tests demonstrated that treatment with PA extract reduced the mNSS score and the time required to remove adhesive tape, while increasing the time spent on the rotarod. Additionally, in the morris water maze test, the frequency of crossing platform and the time spent in the platform quadrant increased. Finally, RNA-Seq and Western blot revealed that PA extract increased the expression of p-ERK, p-CREB and BDNF. Importantly, PA extract mediated proliferation and differentiation of C17.2 and NSCs reversed by the ERK inhibitor SCH772984 and the BDNF inhibitor ANA-12, respectively. CONCLUSION Our study demonstrated that PA extract promoted neurogenesis and angiogenesis by activating the CREB/ERK signaling pathway and upregulating BDNF expression, thereby recovering neurological dysfunction in post-stroke.
Collapse
Affiliation(s)
- Jiangyan Rao
- College of Pharmaceutical Sciences & College of Chinese Medicine, Southwest University, Chongqing, 400715, China
| | - Hongpu Li
- College of Pharmaceutical Sciences & College of Chinese Medicine, Southwest University, Chongqing, 400715, China
| | - Haonan Zhang
- College of Pharmaceutical Sciences & College of Chinese Medicine, Southwest University, Chongqing, 400715, China
| | - Xiaoxia Xiang
- College of Pharmaceutical Sciences & College of Chinese Medicine, Southwest University, Chongqing, 400715, China
| | - Xinyu Ding
- College of Pharmaceutical Sciences & College of Chinese Medicine, Southwest University, Chongqing, 400715, China
| | - Li Li
- College of Pharmaceutical Sciences & College of Chinese Medicine, Southwest University, Chongqing, 400715, China
| | - Funeng Geng
- Sichuan Key Laboratory of Medical American Cockroach, Chengdu, Sichuan, 610000, China.
| | - Hongyi Qi
- College of Pharmaceutical Sciences & College of Chinese Medicine, Southwest University, Chongqing, 400715, China.
| |
Collapse
|
3
|
Zhao P, Tian Y, Geng Y, Zeng C, Ma X, Kang J, Lu L, Zhang X, Tang B, Geng F. Aconitine and its derivatives: bioactivities, structure-activity relationships and preliminary molecular mechanisms. Front Chem 2024; 12:1339364. [PMID: 38318112 PMCID: PMC10839071 DOI: 10.3389/fchem.2024.1339364] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Accepted: 01/12/2024] [Indexed: 02/07/2024] Open
Abstract
Aconitine (AC), which is the primary bioactive diterpene alkaloid derived from Aconitum L plants, have attracted considerable interest due to its unique structural feature. Additionally, AC demonstrates a range of biological activities, such as its ability to enhance cardiac function, inhibit tumor growth, reduce inflammation, and provide analgesic effects. However, the structure-activity relationships of AC are remain unclear. A clear understanding of these relationships is indeed critical in developing effective biomedical applications with AC. In line with these challenges, this paper summarized the structural characteristics of AC and relevant functional and bioactive properties and the structure-activity relationships presented in biomedical applications. The primary temporal scope of this review was established as the period spanning from 2010 to 2023. Subsequently, the objective of this review was to provide a comprehensive understanding of the specific action mechanism of AC, while also exploring potential novel applications of AC derivatives in the biomedical field, drawing upon their structural characteristics. In conclusion, this review has provided a comprehensive analysis of the challenges and prospects associated with AC in the elucidation of structure-bioactivity relationships. Furthermore, the importance of exploring modern biotechnology approaches to enhance the potential biomedical applications of AC has been emphasized.
Collapse
Affiliation(s)
- Pengyu Zhao
- School of Clinical Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Ye Tian
- Guizhou Yunfeng Pharmaceutical Co., Ltd., Qianxinan Buyi and Miao Autonomous Prefecture, China
| | - Yuefei Geng
- Sichuan Key Laboratory of Medical American Cockroach, Chengdu, China
| | - Chenjuan Zeng
- Guizhou Yunfeng Pharmaceutical Co., Ltd., Qianxinan Buyi and Miao Autonomous Prefecture, China
| | - Xiuying Ma
- Sichuan Key Laboratory of Medical American Cockroach, Chengdu, China
| | - Jie Kang
- Guizhou Yunfeng Pharmaceutical Co., Ltd., Qianxinan Buyi and Miao Autonomous Prefecture, China
| | - Lin Lu
- Sichuan Engineering Research Center for Medicinal Animals, Chengdu, China
| | - Xin Zhang
- Sichuan Good Doctor Pharmaceutical Group, Chengdu, China
| | - Bo Tang
- Sichuan Engineering Research Center for Medicinal Animals, Chengdu, China
| | - Funeng Geng
- Sichuan Key Laboratory of Medical American Cockroach, Chengdu, China
- Chengdu University of Traditional Chinese Medicine, Chengdu, China
| |
Collapse
|
4
|
Geng F, Cai YH, Zhao Y, Wei ZQ, Xu H, Yang F. [The mechanism of OC-STAMP overexpression induced actin cytoskeleton remodeling in promoting epithelial-mesenchymal transition in the alveolar type Ⅱ epithelial cell]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2023; 41:801-807. [PMID: 38073205 DOI: 10.3760/cma.j.cn121094-20221009-00479] [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] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
Objective: To explore the mechanism of osteoclast stimulatory transmembrane protein (OC-STAMP) overexpression on epithelial-mesenchymal transition (EMT) . Methods: In April 2021, mice alveolar type Ⅱ epithelial cells MLE-12 were divided into five groups: overexpression control group (NC group), Ocstamp overexpression group (over-Ocstamp group), Fasudil intervention group (over-Ocstamp+Fasudil group), silence control group (si-NC group), Ocstamp silence group (si-Ocstamp group). The protein expressions of OC-STAMP, epithelial marker protein-E-cadherin (E-cad), interstitial marker protein-α-smooth muscle actin (α-SMA), Ras homolog gene family member A (RhoA), Rho GDP dissociation inhibitor α (Rho GDIα), Rho-associated protein kinase (ROCK), phosphate myosin phosphatase (p-MYPT) were examined by Western blotting and Immunocytochemical staining. The filamentous actin (F-actin) was detected by Phalloidin method. t test was used to compare the relative expression of each protein between the two groups. Results: Western blotting and Immunocytochemical staining showed that compared with the NC group, the expression level of E-cad was down-regulated, while the expression levels of α-SMA, Rho GDIα, RhoA, ROCK, p-MYPT were increased, and F-actin expression was enhanced in the over-Ocstamp group. The differences were statistically significant (P<0.05). There were no significant differences in E-cad and α-SMA protein expression in si-Ocstamp group compared with si-NC group (P>0.05). Compared with over-Ocstamp group, the expression level of E-cad protein in over-Ocstamp+Fasudil group was up-regulated, the expression levels of α-SMA, Rho GDIα, RhoA, ROCK and p-MYPT protein were decreased, and F-actin expression was weakened, with statistical significance (P<0.05) . Conclusion: OC-STAMP overexpression in alveolar type Ⅱ epithelial cells may induce actin cytoskeleton remodeling through activation of Rho GDIα/RhoA/ROCK signaling pathway, thus promoting EMT.
Collapse
Affiliation(s)
- F Geng
- Hebei Key Laboratory for Organ Fibrosis Research, Department of Medical Experimental Technology, School of Public Health, North China University of Science and Technology, Tangshan 063000, China
| | - Y H Cai
- Hebei Key Laboratory for Organ Fibrosis Research, Department of Medical Experimental Technology, School of Public Health, North China University of Science and Technology, Tangshan 063000, China
| | - Y Zhao
- Hebei Key Laboratory for Organ Fibrosis Research, Department of Medical Experimental Technology, School of Public Health, North China University of Science and Technology, Tangshan 063000, China
| | - Z Q Wei
- Hebei Key Laboratory for Chronic Diseases, Department of Pathology, School of Basic Medical Sciences, North China University of Science and Technology, Tangshan 063000, China
| | - H Xu
- Hebei Key Laboratory for Organ Fibrosis Research, Department of Medical Experimental Technology, School of Public Health, North China University of Science and Technology, Tangshan 063000, China
| | - F Yang
- Hebei Key Laboratory for Organ Fibrosis Research, Department of Medical Experimental Technology, School of Public Health, North China University of Science and Technology, Tangshan 063000, China
| |
Collapse
|
5
|
Geng F, Ren Y, Hou H, Dai B, Scott JB, Strickland SL, Mehta S, Li J. Gender equity of authorship in pulmonary medicine over the past decade. Pulmonology 2023; 29:495-504. [PMID: 37210334 DOI: 10.1016/j.pulmoe.2023.03.005] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 03/24/2023] [Accepted: 03/24/2023] [Indexed: 05/22/2023] Open
Abstract
BACKGROUND Gender disparity in authorship broadly persists in medical literature, little is known about female authorship within pulmonary medicine. METHODS A bibliometric analysis of publications from 2012 to 2021 in 12 journals with the highest impact in pulmonary medicine was conducted. Only original research and review articles were included. Names of the first and last authors were extracted and their genders were identified using the Gender-API web. Female authorship was described by overall distribution and distribution by country/region/continent and journal. We compared the article citations by gender combinations, evaluated the trend in female authorship, and forecasted when parity for first and last authorship would be reached. We also conducted a systematic review of female authorship in clinical medicine. RESULTS 14,875 articles were included, and the overall percentage of female first authors was higher than last authors (37.0% vs 22.2%, p<0.001). Asia had the lowest percentage of female first (27.6%) and last (15.2%) authors. The percentages of female first and last authors increased slightly over time, except for a rapid increase in the COVID-19 pandemic periods. Parity was predicted in 2046 for the first authors and 2059 for the last authors. Articles with male authors were cited more than articles with female authors. However, male-male collaborations significantly decreased, whereas female-female collaborations significantly increased. CONCLUSIONS Despite the slow improvement in female authorship over the past decade, there is still a substantial gender disparity in female first and last authorship in high-impact medical journals in pulmonary medicine.
Collapse
Affiliation(s)
- F Geng
- Department of Pulmonary and Critical Care Medicine, The First Hospital of China Medical University, Shenyang, China
| | - Y Ren
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, China
| | - H Hou
- Department of Pulmonary and Critical Care Medicine, The First Hospital of China Medical University, Shenyang, China
| | - B Dai
- Department of Pulmonary and Critical Care Medicine, The First Hospital of China Medical University, Shenyang, China
| | - J B Scott
- Department of Cardiopulmonary Sciences, Division of Respiratory Care, Rush University, Chicago, Illinois, USA
| | - S L Strickland
- American Epilepsy Society, Programs, Chicago, Illinois, USA; Department of Health Sciences, Rush University, Chicago, Illinois, USA
| | - S Mehta
- Department of Medicine and Interdepartmental Division of Critical Care Medicine, Sinai Health System, University of Toronto, Toronto, ON, Canada
| | - J Li
- Department of Cardiopulmonary Sciences, Division of Respiratory Care, Rush University, Chicago, Illinois, USA.
| |
Collapse
|
6
|
Yao H, Xiang L, Huang Y, Tan J, Shen Y, Li F, Geng F, Liu W, Li X, Gao Y. Guizhi Shaoyao Zhimu granules attenuate bone destruction in mice with collagen-induced arthritis by promoting mitophagy of osteoclast precursors to inhibit osteoclastogenesis. Phytomedicine 2023; 118:154967. [PMID: 37490802 DOI: 10.1016/j.phymed.2023.154967] [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] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 07/05/2023] [Accepted: 07/10/2023] [Indexed: 07/27/2023]
Abstract
BACKGROUND Guizhi Shaoyao Zhimu decoction, a traditional Chinese medicine formula used empirically for the treatment of rheumatoid arthritis (RA), has been shown to alleviate bone destruction in rats with collagen-induced arthritis (CIA). PURPOSE The aim of this study is to characterize the effects of Guizhi Shaoyao Zhimu granules (GSZGs) on bone destruction in RA and the underlying mechanism. STUDY DESIGN A CIA arthritis model using DBA/1 mice. The animals were divided into a normal group; CIA model group; low, medium, and high-dose GSZG groups (3, 6, and 9 g/kg/day); and a methotrexate group (1.14 mg/kg/w). In vitro, a cytokine induced osteoclastogenesis model was established. METHODS After 28 days of treatment, the paw volume was measured, bone destruction was examined by micro-CT, and the generation of osteoclasts in bone tissue was evaluated via tartrate-resistant acid phosphatase (TRAP) staining. Furthermore, the inhibitory effect and underlying mechanism of action of GSZG on RANKL-induced osteoclastogenesis were investigated in vitro. RESULTS The in vivo analyses demonstrated that the paw volume and degree of bone erosion of mice in the medium- and high-dose GSZG groups were significantly decreased compared to the CIA model group. In addition, GSZG treatment suppressed the excessive generation of osteoclasts in the bone tissue of CIA mice. In vitro, GSZG inhibited RANKL-induced osteoclastogenesis and osteoclast-mediated bone resorption. Specifically, it only inhibited the generation of osteoclast precursors (OCPs); it had no significant effect on the fusion of OCPs or maturation of osteoclasts. Finally, we showed that the inhibitory effect of GSZG on osteoclastogenesis was related to the promotion of PTEN-induced kinase protein 1 (PINK1)/Parkin pathway-mediated mitophagy of osteoclast precursors, which was verified using a PINK1 knockdown small interfering RNA in OCPs. CONCLUSION These findings indicate that GSZG is a candidate for the treatment of bone destruction in RA and provide a more detailed elucidation of the mechanism of GSZG anti-RA bone erosion, i.e., inhibition of the ROS/NF-κB axis through the PINK1/Parkin-mediated mitochondrial autophagic pathway to inhibit osteoclast precursor production, compared to the published literature.
Collapse
Affiliation(s)
- Huan Yao
- Chengdu University of Traditional Chinese Medicine, Chengdu 610072, Sichuan, China; Sichuan Provincial Engineering Research Center of Innovative Re-development of Famous Classical Formulas, Pengzhou 611930, China.
| | - Li Xiang
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu 610072, Sichuan, China.
| | - Yucheng Huang
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu 610072, Sichuan, China.
| | - Jin Tan
- Gooddoctor Pharmaceutical Group Co., Ltd., Anzhou Industrial Park, Mianyang 622651, Sichuan, China.
| | - Yongmei Shen
- Gooddoctor Pharmaceutical Group Co., Ltd., Anzhou Industrial Park, Mianyang 622651, Sichuan, China.
| | - Fangqiong Li
- Gooddoctor Pharmaceutical Group Co., Ltd., Anzhou Industrial Park, Mianyang 622651, Sichuan, China.
| | - Funeng Geng
- Gooddoctor Pharmaceutical Group Co., Ltd., Anzhou Industrial Park, Mianyang 622651, Sichuan, China
| | - Weiwei Liu
- School of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, Sichuan, China
| | - Xueping Li
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu 610072, Sichuan, China.
| | - Yongxiang Gao
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu 610072, Sichuan, China.
| |
Collapse
|
7
|
Xie J, Tan P, Geng F, Shang Q, Qin S, Hao L. A practical and rapid screening method for influenza virus neuraminidase inhibitors based on fluorescence detection. ANAL SCI 2023; 39:547-556. [PMID: 36617368 PMCID: PMC9826620 DOI: 10.1007/s44211-023-00267-y] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 12/29/2022] [Indexed: 01/09/2023]
Abstract
A new analytical method for rapid screening of influenza virus neuraminidase inhibitors was established. The method is based on the principle that, given a certain amount of neuraminidase, the sample and the neuraminidase act in the microplate for a period of time, and the active neuraminidase that is not inhibited by the sample can generate a fluorescence value at a specific wavelength after binding to the substrate, and the rate of inhibition of neuraminidase by the sample can be calculated based on the actual detected fluorescence value. This newly developed method was used to screen and evaluate the in vitro anti-neuraminidase activity of 39 high-purity compounds contained in three traditional Chinese herbal medicines, and finally 25 compounds with strong activity were obtained. The newly established neuraminidase inhibitor analytical method has these advantages of practicality, rapidity, high sensitivity and low cost, and has a good value for promotion and application. This article newly establishes a rapid, sensitive, simple and practical screening method for influenza virus neuraminidase inhibitors, which is a great complement to the existing methods and has a good promotion and application value.
Collapse
Affiliation(s)
- Junjie Xie
- Key Laboratory of Biological Evaluation of TCM Quality of State Administration of Traditional Chinese Medicine, Sichuan Academy of Chinese Medicine Sciences, Chengdu, 610041, China
| | - Peng Tan
- Key Laboratory of Biological Evaluation of TCM Quality of State Administration of Traditional Chinese Medicine, Sichuan Academy of Chinese Medicine Sciences, Chengdu, 610041, China.
| | - Funeng Geng
- Sichuan Key Laboratory for Medicinal American Cockroach, Sichuan Good Doctor Panxi Pharmaceutical Co., Ltd., Chengdu, 610000, China
| | - Qiang Shang
- Sichuan Engineering Research Center of Antiviral Traditional Chinese Medicine Industrialization, Pengzhou, 611900, China
| | - Shanbo Qin
- Key Laboratory of Biological Evaluation of TCM Quality of State Administration of Traditional Chinese Medicine, Sichuan Academy of Chinese Medicine Sciences, Chengdu, 610041, China
| | - Lu Hao
- Key Laboratory of Biological Evaluation of TCM Quality of State Administration of Traditional Chinese Medicine, Sichuan Academy of Chinese Medicine Sciences, Chengdu, 610041, China
| |
Collapse
|
8
|
Luo Z, Li Z, Liang Z, Wang L, He G, Wang D, Shen L, Wang Z, Ma X, Geng F, Wang H, Liu W, Liu H, Li B. Berberine increases stromal production of Wnt molecules and activates Lgr5 + stem cells to promote epithelial restitution in experimental colitis. BMC Biol 2022; 20:287. [PMID: 36528592 PMCID: PMC9759859 DOI: 10.1186/s12915-022-01492-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [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: 03/26/2022] [Accepted: 12/01/2022] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Inflammatory bowel diseases (IBDs) are characterized by sustained inflammation and/or ulcers along the lower digestive tract, and have complications such as colorectal cancer and inflammation in other organs. The current treatments for IBDs, which affect 0.3% of the global population, mainly target immune cells and inflammatory cytokines with a success rate of less than 40%. RESULTS Here we show that berberine, a natural plant product, is more effective than the frontline drug sulfasalazine in treating DSS (dextran sulfate sodium)-induced colitis in mice, and that berberine not only suppresses macrophage and granulocyte activation but also promotes epithelial restitution by activating Lgr5+ intestinal stem cells (ISCs). Mechanistically, berberine increases the expression of Wnt genes in resident mesenchymal stromal cells, an ISC niche, and inhibiting Wnt secretion diminishes the therapeutic effects of berberine. We further show that berberine controls the expression of many circadian rhythm genes in stromal cells, which in turn regulate the expression of Wnt molecules. CONCLUSIONS Our findings suggest that berberine acts on the resident stromal cells and ISCs to promote epithelial repair in experimental colitis and that Wnt-β-Catenin signaling may be a potential target for colitis treatment.
Collapse
Affiliation(s)
- Zecheng Luo
- grid.411304.30000 0001 0376 205XInstitute of Traditional Chinese Medicine and Stem Cell Research, College of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Zihao Li
- grid.16821.3c0000 0004 0368 8293Bio-X-Renji Hospital Research Center, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Zheng Liang
- grid.411304.30000 0001 0376 205XInstitute of Traditional Chinese Medicine and Stem Cell Research, College of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Lin Wang
- grid.411304.30000 0001 0376 205XInstitute of Traditional Chinese Medicine and Stem Cell Research, College of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Guanlin He
- grid.411304.30000 0001 0376 205XInstitute of Traditional Chinese Medicine and Stem Cell Research, College of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Dongdi Wang
- grid.16821.3c0000 0004 0368 8293Shanghai Institute of Immunology, Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Lei Shen
- grid.16821.3c0000 0004 0368 8293Shanghai Institute of Immunology, Department of Immunology and Microbiology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhengting Wang
- grid.16821.3c0000 0004 0368 8293Department of Gastroenterology, Ruijin Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Xiuying Ma
- Good Doctor Pharmaceutical Group of Sichuan, Chengdu, 610000 Sichuan China
| | - Funeng Geng
- Good Doctor Pharmaceutical Group of Sichuan, Chengdu, 610000 Sichuan China
| | - Haozhong Wang
- grid.411304.30000 0001 0376 205XCollege of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075 China
| | - Wenping Liu
- grid.411304.30000 0001 0376 205XCollege of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075 China
| | - Huijuan Liu
- grid.16821.3c0000 0004 0368 8293Bio-X-Renji Hospital Research Center, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Baojie Li
- grid.411304.30000 0001 0376 205XInstitute of Traditional Chinese Medicine and Stem Cell Research, College of Basic Medical Sciences, Chengdu University of Traditional Chinese Medicine, Chengdu, China ,grid.16821.3c0000 0004 0368 8293Bio-X-Renji Hospital Research Center, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| |
Collapse
|
9
|
Qin X, Zhou H, Wang X, Tian M, Dong Z, Wang C, Geng F, Huang Q. UHPLC‐Q‐Orbitrap HRMS Combined with Network Pharmacology to Explore the Mechanism of Chuanhuang Qingre Capsule in the Treatment of Acute Pharyngitis. ChemistrySelect 2022. [DOI: 10.1002/slct.202202539] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Xiaoyan Qin
- State Key Laboratory of Southwestern Chinese Medicine Resources No.1166, Liutai Road, Wenjiang District Chengdu 611137 China
- College of Pharmacy Chengdu University of Traditional Chinese Medicine No.1166, Liutai Road, Wenjiang District Chengdu 611137 China
| | - Hailun Zhou
- State Key Laboratory of Southwestern Chinese Medicine Resources No.1166, Liutai Road, Wenjiang District Chengdu 611137 China
- College of Pharmacy Chengdu University of Traditional Chinese Medicine No.1166, Liutai Road, Wenjiang District Chengdu 611137 China
| | - Xi Wang
- State Key Laboratory of Southwestern Chinese Medicine Resources No.1166, Liutai Road, Wenjiang District Chengdu 611137 China
- College of Pharmacy Chengdu University of Traditional Chinese Medicine No.1166, Liutai Road, Wenjiang District Chengdu 611137 China
| | - Maoying Tian
- State Key Laboratory of Southwestern Chinese Medicine Resources No.1166, Liutai Road, Wenjiang District Chengdu 611137 China
- College of Pharmacy Chengdu University of Traditional Chinese Medicine No.1166, Liutai Road, Wenjiang District Chengdu 611137 China
| | - Zhaowei Dong
- State Key Laboratory of Southwestern Chinese Medicine Resources No.1166, Liutai Road, Wenjiang District Chengdu 611137 China
- College of Pharmacy Chengdu University of Traditional Chinese Medicine No.1166, Liutai Road, Wenjiang District Chengdu 611137 China
| | - Chao Wang
- Sichuan Integrated Traditional Chinese and Western Medicine Hospital, No.51, Section 4 Renmin South Road, Wuhou District Chengdu 610042 China
| | - Funeng Geng
- Sichuan Engineering Research Center for Medicinal Animals Jinhan Road, Shuangliu District Chengdu 611137 China
| | - Qinwan Huang
- State Key Laboratory of Southwestern Chinese Medicine Resources No.1166, Liutai Road, Wenjiang District Chengdu 611137 China
- College of Pharmacy Chengdu University of Traditional Chinese Medicine No.1166, Liutai Road, Wenjiang District Chengdu 611137 China
| |
Collapse
|
10
|
Liu P, Yu D, Sheng W, Geng F, Zhang J, Zhang S. PPARα activation by fenofibrate ameliorates radiation-induced skin injury. J Eur Acad Dermatol Venereol 2022; 36:e207-e210. [PMID: 34657324 DOI: 10.1111/jdv.17745] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 10/11/2021] [Indexed: 01/31/2023]
Affiliation(s)
- P Liu
- Department of Gastroenterology, the Jiangyin Clinical College of Xuzhou Medical University, Jiangyin, China
| | - D Yu
- West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, China
- Second Affiliated Hospital of Chengdu Medical College, China National Nuclear Corporation 416 Hospital, Chengdu, China
| | - W Sheng
- State Key Lab of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Medical College of Soochow University, Suzhou, China
| | - F Geng
- West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, China
| | - J Zhang
- Radiation Medicine Department of Institute of Preventive Medicine, Fourth Military Medical University, Xi'an, China
| | - S Zhang
- West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, China
- Second Affiliated Hospital of Chengdu Medical College, China National Nuclear Corporation 416 Hospital, Chengdu, China
- West China Second University Hospital, Sichuan University, Chengdu, China
| |
Collapse
|
11
|
Wan X, Chen Y, Geng F, Sheng Y, Wang F, Guo J. Narrative review of the mechanism of natural products and scar formation in wound repair. Ann Transl Med 2022; 10:236. [PMID: 35280378 PMCID: PMC8908149 DOI: 10.21037/atm-21-7046] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 02/21/2022] [Indexed: 11/21/2022]
Abstract
Background and Objective Wound healing is a complex and multifactorial response to the disruption of the normal anatomy and function of skin tissue, which mainly includes four progressive stages: hemostasis, inflammation, proliferation and remodeling. Wound healing is a complex process, and multiple conditions can lead to impaired wound healing and, consequently, scar formation. Natural products discovered and applied for a long time have always been the source of new drugs. With the deepening of research, the role of natural products in promoting wound repair has gradually been a focus. Some natural products and compound drugs are effective in promoting skin wound healing and in reducing adverse reactions after wound healing. Methods This article reviews the mechanism of natural products and some compound drugs in healing skin wounds from the following aspects: related cellular effects during wound repair and scar formation, regulation of growth factors, extracellular matrix (ECM), and collagen metabolism. Key Content and Findings Proteolysis by proteolytic enzymes, such as plasmin, matrix metalloproteinases, and their activators and inhibitors, plays a critical role in wound repair. Some keratinocytes often express some matrix metalloproteinases and plasminogen activators, thus promoting the hydrolysis of components such as fibrin in blood clots to facilitate migration. Conclusions In this paper, we review recent studies on the role and mechanism of some natural products on scar formation found in wound repair. We aim to provide a basis for the in-depth study of the intrinsic mechanism of natural products in repairing wounds and a reference for further development of drugs for wound repair with better efficacy and fewer side effects.
Collapse
Affiliation(s)
- Xiaoping Wan
- Key Laboratory of Systematic Research of Distinctive Chinese Medicine Resources in Southwest China, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- Innovative Institute of Chinese Medicine and Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- Ministry of Education Key Laboratory of Standardization of Chinese Herbal Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yangyang Chen
- Key Laboratory of Systematic Research of Distinctive Chinese Medicine Resources in Southwest China, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- Ministry of Education Key Laboratory of Standardization of Chinese Herbal Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Funeng Geng
- Sichuan Key Laboratory of Medical American Cockroach, Chengdu, China
| | - Yongmei Sheng
- Sichuan Key Laboratory of Medical American Cockroach, Chengdu, China
| | - Fang Wang
- Key Laboratory of Systematic Research of Distinctive Chinese Medicine Resources in Southwest China, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- Ministry of Education Key Laboratory of Standardization of Chinese Herbal Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Jinlin Guo
- Key Laboratory of Systematic Research of Distinctive Chinese Medicine Resources in Southwest China, Chengdu University of Traditional Chinese Medicine, Chengdu, China
- Ministry of Education Key Laboratory of Standardization of Chinese Herbal Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| |
Collapse
|
12
|
Zang X, Du W, Geng F, Meng P, E L, Zhang H, Wang X, Li L, Xiao R. Clinical observation of allergic contact stomatitis treated with Kangfuxin solution as adjuvant: case report. Ann Transl Med 2022; 10:721. [PMID: 35845480 PMCID: PMC9279792 DOI: 10.21037/atm-22-2734] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 06/20/2022] [Indexed: 11/30/2022]
Abstract
Background Allergic contact stomatitis (ACS) is common among people with allergic constitution and who have allergy reaction to specific allergen such as drugs, food, and materials because of immune dysfunction. With the development of materials science, the increasing diversity of cosmetics and food additives has gradually raised the incidence rate of ACS. Now systemic and local therapy are adopted in the therapy of ACS. However, the systemic therapy would drop the drugs’ concentration after it reaches the treatment area through the layers of human barriers, while the locally-used drugs such as collutory may not be suitable for patients with skin lesion. Kangfuxin contains a variety of biological extracts which is anti-inflammatory and curative and can produce connective tissues whether it's skin or mucous membrane. It can be used not only in non-oral diseases such as gastric ulcer or gynecological diseases, but also in the treatment of recurrent aphthous ulcer and many kinds of stomatitis and has shown good anti-inflammatory and curative effects. This study aimed to explore the effectiveness of Kangfuxin solution as a local-used adjuvant drug to treat ACS. Case Description We present a 22-year-old male with ACS whose complaint at the first visit was severe pain, accompanied by salivation, tongue enlargement, bleeding, tonsil enlargement, and symptoms of difficulty in eating, fatigue, and dizziness. After the physical and laboratory examination, we found no abnormalities other than a history of eating the kiwi fruit, which is a common allergen. Thus, he was diagnosed as ACS. In this case, we provided a pharmacologic therapeutic intervention of chlorpheniramine (one tablet, three times a day) and Kangfuxin solution (gargle for 15 min, three times a day) with advice that no exposure to the allergen. On the third day, the patient felt no significant relief of symptoms, while one week after the first visit, the symptoms had obviously alleviated and most of the red lip erosion disappeared. The patient recovered completely with no discomfort in ten days after the initial visit. Conclusions This study investigated the therapeutic effect of Kangfuxin solution combined with chlorpheniramine on ACS.
Collapse
Affiliation(s)
- Xiaoyi Zang
- Department of Stomatology, the First Medical Center, Chinese PLA General Hospital, Beijing, China
- Graduate School, Chinese PLA General Hospital, Beijing, China
| | - Wenjuan Du
- Laboratory of Radiation Injury Treatment, Medical Innovation Research Division, PLA General Hospital, Beijing, China
| | - Funeng Geng
- Sichuan Key Laboratory of Medical American Cockroach, Beijing, China
| | - Panpan Meng
- Department of Stomatology, the First Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Lingling E
- Department of Stomatology, the First Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Haizhong Zhang
- Department of Stomatology, the First Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Xinling Wang
- Department of Stomatology, the First Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Lin Li
- Institute of Hospital Management, Medical Innovation Research Division, PLA General Hospital, Beijing, China
| | - Rui Xiao
- Department of Stomatology, the First Medical Center, Chinese PLA General Hospital, Beijing, China
| |
Collapse
|
13
|
Wang L, Fan R, Geng F, Gao Y, Huang Q. Protective effect of crude polysaccharide from Pao-TianXiong derived from monkshood, against chronic renal failure in mice. TROP J PHARM RES 2021. [DOI: 10.4314/tjpr.v18i6.13] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Purpose: To investigate the effect of crude polysaccharide isolated from pao-tian-xiong on chronic renal failure in mice, and its monosaccharide composition.
Methods: Male Kunming mice were orally treated with adenine (211.5 mg/kg/day) for 7 days, followed by either crude polysaccharides (125, 250 or 500 mg/kg), or positive drug solution (jinguishenqi pill, 2000 mg/kg) for another 7 days (each group had 15 mice). Mice in normal and negative control groups were given saline. Mental and physical states, blood urine nitrogen (BUN) and serum creatinine (SCr), kidney morphological changes and organ indices were determined. Histopathological examination of spleen and kidney tissues was also performed. The monosaccharide composition of crude polysaccharide was determined by high-performance liquid chromatography (HPLC) and gas chromatography and mass spectrometry (GC-MS).
Results: Compared with negative control group, serum BUN (6.71 mmol/L vs. 8.61 mmol/L) and Cr (107.74 vs. 113.39 μmol/L) were significantly decreased by the crude polysaccharide isolate (p < 0.05), whereas epididymis index (0.2556 vs. 0.2135 %) and seminal vesicle index (0.5547 vs. 0.3945 %) were increased (p < 0.05). Histopathological examination showed that injuries to kidney, spleen, testis and epididymis decreased significantly. The crude polysaccharides contained mainly glucose, rhamnose, arabinose, galactose, mannose, galacturonic acid, glucuronic acid and xylose, and their contents ranged from 0.7 to 65 %.
Conclusion: These results suggest that the crude polysaccharides of Pao-tian-xiong ameliorates CRF symptoms in mice, thereby providing experimental evidence in support of its use as an anti-CRF drug.
Collapse
|
14
|
Tian M, Dong J, Wang Z, Lu S, Geng F. The effects and mechanism of Kangfuxin on improving healing quality and preventing recurrence of gastric ulcer. Biomed Pharmacother 2021; 138:111513. [PMID: 33761454 DOI: 10.1016/j.biopha.2021.111513] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 08/10/2020] [Revised: 02/24/2021] [Accepted: 03/11/2021] [Indexed: 02/06/2023] Open
Abstract
This study investigated the gastroprotective effects and possible mechanism of Kangfuxin (KFX), an ethanol extract of Periplaneta americana L. (Dictyoptera; Blattidae), on improving healing quality and preventing recurrence of gastric ulcer. The effects of KFX were investigated in patients treated with endoscopic submucosal dissection (ESD), gastric ulcer animal model, and rat gastric mucosal cells and fibroblasts. Moreover, the relationship between KFX and p38/NF-κB pathway were explored both in vivo and in vitro. In patients, KFX exhibited protective effects against gastric ulcers and resulted in a decrease in the CD3 expression. In vivo animal experiments confirmed that KFX accelerated ulcer healing by promoting neovascularization (increased CD34 expression), suppressing inflammation (decreased interleukin-1β (IL-1β), myeloperoxidase (MPO), tumor necrosis factor α (TNF-α), intercellular adhesion molecule-1 (ICAM-1), and IL-8 expression), and enhancing growth factor expression, including the epidermal growth factor receptor (EGFR) and hepatocyte growth factor (HGF). In vitro experiments demonstrated that treatment with 10% KFX rat serum decreased IL-1β, IL-1Ra, SIL-1RAP, TNF-α, and ICAM-1 expression in rat gastric mucosal cells or fibroblasts and increased IL-1R expression compared to that in the group treatment with 10% normal rat serum. Furthermore, KFX inhibited the activation of p38/NF-κB pathway both in vivo and in vitro. In conclusion, KFX treatment could effectively improve healing quality and prevent gastric ulcer recurrence, which might be attributed to neovascularization, suppressed inflammation, and enhanced growth factor expression. The p38/NF-κB pathway may be one of important mechanism to mediate the effects of KFX.
Collapse
Affiliation(s)
- Ming Tian
- Shanghai Burn Institute, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Jiaoyun Dong
- Shanghai Burn Institute, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Zhengting Wang
- Department of Gastroenterology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Shuliang Lu
- Shanghai Burn Institute, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China.
| | - Funeng Geng
- Sichuan Key Laboratory of Medical American Cockroach, Chengdu, Sichuan 610000, China.
| |
Collapse
|
15
|
Luo Y, Li J, Hu Y, Gao F, Pak-Heng Leung G, Geng F, Fu C, Zhang J. Injectable thermo-responsive nano-hydrogel loading triptolide for the anti-breast cancer enhancement via localized treatment based on "two strikes" effects. Acta Pharm Sin B 2020; 10:2227-2245. [PMID: 33304788 PMCID: PMC7715064 DOI: 10.1016/j.apsb.2020.05.011] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 03/25/2020] [Accepted: 03/27/2020] [Indexed: 12/20/2022] Open
Abstract
The clinical application of triptolide (TPL) in tumor therapy has been greatly limited by its toxicity and inefficient delivery. Herein, a localized and sustained-release thermo-sensitive hydrogel was developed for the intra-tumor administration of TPL. Based on the amphiphilic structure of poly (N-isopropylacrylamide-co-acrylic acid)-g-F68 copolymer, it was able to form nano-micelles to efficiently encapsulate TPL, and then turn into a hydrogel at 37 °C. TPL@nano-gel exhibited a sustained drug release profile in vitro and a stronger anticancer effect caused by “two strikes”. The “first strike” was its enhanced cytotoxicity compared to free TPL, due to the enhanced pro-apoptosis effect observed in both MDA-MB-231 and MCF-7 cells caused by the regulation of endogenous mitochondrial pathways. Furthermore, TPL@nano-gel exhibited a “second-strike” through its anti-angiogenesis capabilities mediated through VEGFR-2 signaling inhibition. As expected, after intra-tumoral injection at a 0.45 mg/kg TPL-equivalent dose three times over 14 days in 4T1 tumor-bearing mice, TPL@nano-gel led to lower systemic toxicity and higher antitumor efficacy compared to multiple injections of TPL. In this regard, these findings indicate that this injectable thermo-responsive hydrogel carries great potential for TPL as a safe and effective cancer therapy.
Collapse
|
16
|
Wang T, Liao Q, Wu Y, Wang X, Fu C, Geng F, Qu Y, Zhang J. A composite hydrogel loading natural polysaccharides derived from Periplaneta americana herbal residue for diabetic wound healing. Int J Biol Macromol 2020; 164:3846-3857. [PMID: 32841667 DOI: 10.1016/j.ijbiomac.2020.08.156] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [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: 06/12/2020] [Revised: 08/17/2020] [Accepted: 08/20/2020] [Indexed: 02/07/2023]
Abstract
In view of the long medicinal use history of Periplaneta americana for manifold ulcer or skin wounds treatment, the comprehensive utilization value of P. americana herbal residue was evaluated. In this study, we isolated a polysaccharide fraction from P. americana herbal residue with the potential wound healing effect, named as PAP faction, based on our previous study and provided the structural and monosaccharide composition characterization. To improve the topical wound dressing property, a novel composite hydrogel consisting of PAP, carbomer 940 (CBM), carboxymethyl cellulose (CMC) with different ratios were prepared and optimized. Mediated by the physical crosslinking effect among these polymers, the composite hydrogel exhibited good three-dimensional network structures, good swelling and water retention capacity, moderate mechanical property in rheological test. And then, the good cytocompatibility of hydrogel was corroborated by 3T3 fibroblast proliferation assay. Finally, the composite hydrogel loading PAP has been proved to accelerate wound healing in diabetic rat models, by promoting wound closure, collagen deposition, M2 macrophages polarization and angiogenesis. In summary, this study would provide an effective and promising wound dressing candidate for the prevention and treatment of diabetic wound, based on the ecological concept of the comprehensive utilization of natural herbal resources.
Collapse
Affiliation(s)
- Ting Wang
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Qian Liao
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Yihan Wu
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Xiao Wang
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Chaomei Fu
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Funeng Geng
- Sichuan Key Laboratory of Medical Periplaneta Americana, Chengdu, China
| | - Yan Qu
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Jinming Zhang
- College of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| |
Collapse
|
17
|
Zeng C, Liao Q, Hu Y, Shen Y, Geng F, Chen L. The Role of Periplaneta americana (Blattodea: Blattidae) in Modern Versus Traditional Chinese Medicine. J Med Entomol 2020; 56:1522-1526. [PMID: 31265723 DOI: 10.1093/jme/tjz081] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Indexed: 02/05/2023]
Abstract
The purpose of this review is to elaborate the role of Periplaneta (P.) americana L. in modern and traditional Chinese medicine (TCM) and compare the use of the species in these two forms of medical treatments. From searches on Google Scholar, PubMed, and Web of Science databases, studies were identified involving TCMs with P. americana, which have a history of use over several thousand years, and demonstrate how extracts from this insect play a role in the treatment of diseases through antibacterial, antiviral, antitumor activity, and enhancement of immune function. Extracts from P. americana have not been fully developed for clinical use because the active components have not been completely purified or their molecular mechanisms thoroughly understood. The development of extraction technology in modern Chinese medicine has revealed that many extracts from P. americana are able to play an important role in the control of diseases such as cancer. Drugs such as 'Kangfuxin Solution' and 'Xinmailong Injection' are now widely used for gastrointestinal ulcers and chronic heart failure, having achieved beneficial curative effects in clinical studies. Based on this, the information from studies of P. americana in TCM and modern medicine should be combined and their respective advantages applied. This review provides an overview of the role of P. americana in modern and TCM and thus contributes to identification of further applications and area requiring drug development.
Collapse
Affiliation(s)
- Chenjuan Zeng
- Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan, P.R. China
| | - Qi Liao
- Gooddoctor Pharmaceutical Group, Chengdu, Sichuan, P.R. China
| | - Ye Hu
- Gooddoctor Pharmaceutical Group, Chengdu, Sichuan, P.R. China
| | - Yongmei Shen
- Gooddoctor Pharmaceutical Group, Chengdu, Sichuan, P.R. China
| | - Funeng Geng
- Gooddoctor Pharmaceutical Group, Chengdu, Sichuan, P.R. China
| | - Lijuan Chen
- Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan, P.R. China
| |
Collapse
|
18
|
Lu S, Wu D, Sun G, Geng F, Shen Y, Tan J, Sun X, Luo Y. Gastroprotective effects of Kangfuxin against water-immersion and restraint stress-induced gastric ulcer in rats: roles of antioxidation, anti-inflammation, and pro-survival. Pharm Biol 2019; 57:770-777. [PMID: 31696757 PMCID: PMC6844415 DOI: 10.1080/13880209.2019.1682620] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [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: 05/04/2023]
Abstract
Context: Kangfuxin (KFX) is widely used for the treatment of gastric and duodenal ulcer; however, more research is needed to determine the protective mechanisms of KFX in ameliorating gastric ulcer.Objective: To investigate the efficacy and potential mechanism of Kangfuxin liquid (KFX) in water-immersion and restraint stress (WIRS)-induced gastric ulcer.Materials and methods: Seventy rats were randomly divided into seven groups (n = 10) as follows: the control group (normal saline, i.g.), the model group (normal saline, i.g.), the KFX groups (2.5, 5 and 10 mL/kg, i.g.), the omeprazole group (20 mg/kg, i.p.) and Sanjiuweitai Granules group (1850 mg/kg, i.g.). The WIRS model was applied to induce stress ulcers after 7 days of drug administration. Afterwards, rats were sacrificed at 10 h induced by WIRS.Results: Pre-treatment with KFX (5,10 mL/kg) could effectively reduce the area of gastric ulcers and improve the pathological changes of ulcerated tissue. Moreover, KFX (5,10 mL/kg) increased the prostaglandin E2 (52%) and cyclooxygenase-1 (30%) levels, and improved malondialdehyde (54%), superoxide dismutase (58%), catalase (39%), and nitric oxide (11%) and TNF-α (9%), IL-6 (11%), MMP-9 (54%) and MMP-2 (53%) of ulcer tissue. Furthermore, pre-treatment with KFX dramatically increased IGF-1, PTEN, and Akt protein expression.Conclusions: Our results suggest that KFX has protective effects on WIRS-induced gastric ulcer via inflammatory reactions, oxidative stress inhibition, and pro-survival action, which were the results of activating the IGF-1/PTEN/Akt signalling pathway. Our results provide evidence of KFX for treating gastric ulcer.
Collapse
Affiliation(s)
- Shan Lu
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
- Key Laboratory of New Drug Discovery Based on Classic Chinese Medicine Prescription, Chinese Academy of Medical Sciences, Beijing, China
| | - Daoshun Wu
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
- Key Laboratory of New Drug Discovery Based on Classic Chinese Medicine Prescription, Chinese Academy of Medical Sciences, Beijing, China
| | - Guibo Sun
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
- Key Laboratory of New Drug Discovery Based on Classic Chinese Medicine Prescription, Chinese Academy of Medical Sciences, Beijing, China
| | - Funeng Geng
- Sichuan Good Doctor Panxi Pharmaceutical Co., LTD., Xichang, China
| | - Yongmei Shen
- Sichuan Good Doctor Panxi Pharmaceutical Co., LTD., Xichang, China
| | - Jin Tan
- Sichuan Good Doctor Panxi Pharmaceutical Co., LTD., Xichang, China
| | - Xiaobo Sun
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
- Key Laboratory of New Drug Discovery Based on Classic Chinese Medicine Prescription, Chinese Academy of Medical Sciences, Beijing, China
- Xiaobo Sun Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, No. 151, Malianwa North Road, Haidian District, Beijing 100193, China
| | - Yun Luo
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
- Beijing Key Laboratory of Innovative Drug Discovery of Traditional Chinese Medicine (Natural Medicine) and Translational Medicine, Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
- Key Laboratory of New Drug Discovery Based on Classic Chinese Medicine Prescription, Chinese Academy of Medical Sciences, Beijing, China
- CONTACT Yun Luo
| |
Collapse
|
19
|
Chen Z, Hu Y, Li J, Zhang C, Gao F, Ma X, Zhang J, Fu C, Geng F. A feasible biocompatible hydrogel film embedding Periplaneta americana extract for acute wound healing. Int J Pharm 2019; 571:118707. [DOI: 10.1016/j.ijpharm.2019.118707] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Revised: 08/24/2019] [Accepted: 09/16/2019] [Indexed: 01/20/2023]
|
20
|
Zeng C, Li W, Liao Q, Yan T, Wang K, Hu Y, Shen Y, Price M, Fan Z, Zhang X, Yue B, Geng F, Chen L. Comparative Transcriptomics Reveals the Expression Differences Between Four Developmental Stages of American Cockroach ( Periplaneta americana). DNA Cell Biol 2019; 38:1078-1087. [PMID: 31524500 DOI: 10.1089/dna.2018.4578] [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: 02/05/2023] Open
Abstract
The globally distributed American cockroach (Periplaneta americana) is considered a pest, but it has been widely used in traditional Chinese medicine. In the past, the American cockroach's genome and transcriptomes were sequenced, but the differential expression transcripts between developmental stages were unavailable. We performed the de novo assembly and analysis of American cockroach transcriptomes from four developmental stages. Approximately 200 million high-quality paired-end reads were generated by using Illumina Hiseq 2000 sequencer. The assembly produced 291,250 transcripts with an average length of 714 bp. In addition, 38,052 microsatellites and 11,060,020 transposable elements were identified. Based on sequence homology, 53,262 transcripts were annotated. After calculating the expression levels of all the transcripts, we found that 13 transcripts were highly expressed in all the samples and at least two, p10 and actin-related protein 1, played important roles during development. A total of 7954 differentially expressed transcripts (DETs) were identified. The adult had the largest number of DETs when compared to other samples (4818), while the 3rd and 8th larva had the least number of DETs (1332). We performed gene enrichment analysis with the DETs, and some interesting results were detected in the different groups. For example, chitin is the major component of the insect exoskeleton, and the chitin-related genes in larvae and new molted samples had higher expression levels than in adults. In addition, the enrichment analysis detected many chitin-related pathways. Our study performed the first large-scale comparative transcriptomics between the developmental stages of American cockroach, which could provide useful gene expression data for future studies.
Collapse
Affiliation(s)
- Chenjuan Zeng
- Collaborative Innovation Center for Biotherapy, Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan, People's Republic of China.,Sichuan Key Laboratory for Medicinal American Cockroach, Chengdu, Sichuan, People's Republic of China
| | - Wujiao Li
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, Sichuan, People's Republic of China
| | - Qi Liao
- Sichuan Key Laboratory for Medicinal American Cockroach, Chengdu, Sichuan, People's Republic of China
| | - Tingting Yan
- Sichuan Key Laboratory for Medicinal American Cockroach, Chengdu, Sichuan, People's Republic of China
| | - Kaisun Wang
- Sichuan Key Laboratory for Medicinal American Cockroach, Chengdu, Sichuan, People's Republic of China
| | - Ye Hu
- Sichuan Key Laboratory for Medicinal American Cockroach, Chengdu, Sichuan, People's Republic of China
| | - Yongmei Shen
- Sichuan Key Laboratory for Medicinal American Cockroach, Chengdu, Sichuan, People's Republic of China
| | - Megan Price
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, Sichuan, People's Republic of China
| | - Zhenxin Fan
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, Sichuan, People's Republic of China
| | - Xiuyue Zhang
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, Sichuan, People's Republic of China
| | - Bisong Yue
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, Sichuan, People's Republic of China
| | - Funeng Geng
- Sichuan Key Laboratory for Medicinal American Cockroach, Chengdu, Sichuan, People's Republic of China
| | - Lijuan Chen
- Collaborative Innovation Center for Biotherapy, Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan, People's Republic of China
| |
Collapse
|
21
|
Mishriki S, Abdel Fattah AR, Kammann T, Sahu RP, Geng F, Puri IK. Rapid Magnetic 3D Printing of Cellular Structures with MCF-7 Cell Inks. Research (Wash D C) 2019; 2019:9854593. [PMID: 31549098 PMCID: PMC6750075 DOI: 10.34133/2019/9854593] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 01/10/2019] [Indexed: 12/22/2022]
Abstract
A contactless label-free method using a diamagnetophoretic ink to rapidly print three-dimensional (3D) scaffold-free multicellular structures is described. The inks consist of MCF-7 cells that are suspended in a culture medium to which a paramagnetic salt, diethylenetriaminepentaacetic acid gadolinium (III) dihydrogen salt hydrate (Gd-DTPA), is added. When a magnetic field is applied, the host fluid containing the paramagnetic salt is attracted towards regions of high magnetic field gradient, displacing the ink towards regions with a low gradient. Using this method, 3D structures are printed on ultra-low attachment (ULA) surfaces. On a tissue culture treated (TCT) surface, a 3D printed spheroid coexists with a two-dimensional (2D) cell monolayer, where the composite is termed as a 2.5D structure. The 3D structures can be magnetically printed within 6 hours in a medium containing 25 mM Gd-DTPA. The influence of the paramagnetic salt on MCF-7 cell viability, cell morphology, and ability of cells to adhere to each other to stabilize the printed structures on both ULA and TCT surfaces is investigated. Gene expressions of hypoxia-inducible factor 1-alpha (HIF1α) and vascular endothelial growth factor (VEGF) allow comparison of the relative stresses for the printed 3D and 2.5D cell geometries with those for 3D spheroids formed without magnetic assistance. This magnetic printing method can be potentially scaled to a higher throughput to rapidly print cells into 3D heterogeneous cell structures with variable geometries with repeatable dimensions for applications such as tissue engineering and tumour formation for drug discovery.
Collapse
Affiliation(s)
- S. Mishriki
- School of Biomedical Engineering, McMaster University, Hamilton, Ontario, Canada
| | - A. R. Abdel Fattah
- Department of Mechanical Engineering, McMaster University, Hamilton, Ontario, Canada
| | - T. Kammann
- Faculty of Biological Sciences, Friedrich-Schiller-University Jena, Germany
| | - R. P. Sahu
- Department of Mechanical Engineering, McMaster University, Hamilton, Ontario, Canada
| | - F. Geng
- Department of Mechanical Engineering, McMaster University, Hamilton, Ontario, Canada
| | - I. K. Puri
- School of Biomedical Engineering, McMaster University, Hamilton, Ontario, Canada
- Department of Mechanical Engineering, McMaster University, Hamilton, Ontario, Canada
| |
Collapse
|
22
|
Ma X, Hu Y, Li X, Zheng X, Wang Y, Zhang J, Fu C, Geng F. Periplaneta americana Ameliorates Dextran Sulfate Sodium-Induced Ulcerative Colitis in Rats by Keap1/Nrf-2 Activation, Intestinal Barrier Function, and Gut Microbiota Regulation. Front Pharmacol 2018; 9:944. [PMID: 30186174 PMCID: PMC6113651 DOI: 10.3389/fphar.2018.00944] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [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: 01/10/2018] [Accepted: 08/02/2018] [Indexed: 12/21/2022] Open
Abstract
Periplaneta americana, a magic medicinal insect being present for over 300 million years, exhibits desirable therapeutic outcome for gastrointestinal ulcer treatment. Nowadays, P. americana ethanol extract (PAE) has been shown to ameliorate ulcerative colitis (UC) by either single-use or in combination with other therapeutic agents in clinics. However, its underlying mechanisms are still seldom known. Herein, we investigated the anti-UC activity of PAE by alleviating intestinal inflammation and regulating the disturbed gut microbiota structure in dextran sulfate sodium (DSS)-induced UC rats. Based on multiple constitute analyses by HPLC for quality control, PAE was administrated to DSS-induced UC rats by oral gavage for 2 weeks. The anti-UC effect of PAE was evaluated by inflammatory cytokine production, immunohistochemical staining, and gut microbiota analysis via 16S rRNA sequencing. As a result, PAE remarkably attenuated DSS-induced UC in rats. The colonic inflammatory responses manifested as decreased colonic atrophy, intestinal histopathology scores and inflammatory cytokines. In addition, PAE improved the intestinal barrier function via activating Keap1/Nrf-2 pathway and promoting the expressions of tight junction proteins. It was observed that the UC rats showed symptoms of gut microbial disturbance, i.e., the increased Firmicutes/Bacteroidetes ratio and the significantly decreased probiotics such as Lactobacillus, Roseburia, and Pectobacterium, which were negatively correlated with these detected pro-inflammatory cytokines (secreted by immune CD4+ T cells, and including IFN-γ, TNF-α, IL-6, IL-8, IL-17, IL-1β). Besides, PAE administration regulated the abnormal intestinal microbial composition and made it similar to that in normal rats. Therefore, PAE could attenuate the DSS-induced UC in rats, by means of ameliorating intestinal inflammation, improving intestinal barrier function, and regulating the disturbed gut microbiota, especially improving beneficial intestinal flora growth, modulating the flora structure, and restoring the intestinal-immune system.
Collapse
Affiliation(s)
- Xuewei Ma
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yichen Hu
- College of Pharmacy and Biological Engineering, Chengdu University, Chengdu, China
| | - Xin Li
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Xiaoting Zheng
- International Association of Quality Research in Chinese Medicine, Macau, China
| | - Yitao Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Jinming Zhang
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China.,State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, China
| | - Chaomei Fu
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Funeng Geng
- Sichuan Key Laboratory of Medical American Cockroach, Chengdu, China
| |
Collapse
|
23
|
Ma X, Sun J, Ye W, Huang Y, Sun C, Tao Y, Wang T, Cong W, Geng F. Pro-apoptotic effects of Kangfuxin on human stomach cancer cells and its underlying mechanism. Oncol Lett 2018; 16:931-939. [PMID: 29963166 PMCID: PMC6019916 DOI: 10.3892/ol.2018.8713] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 07/25/2016] [Accepted: 03/19/2018] [Indexed: 12/11/2022] Open
Abstract
Kangfuxin (KFX) is an oral liquid derived from Periplaneta americana, with complex components. KFX has been demonstrated to exhibit anticancer activity in a variety of different types of tumor, including gastric cancer; however, its underlying molecular mechanism remains unclear. The present study was designed to investigate the pro-apoptotic effects of KFX on SGC-7901 cells, in order to provide a theoretical basis for clinical application. In order to clarify the pro-apoptotic effects of KFX on SGC-7901 cells, MTT analysis was conducted. To evaluate the anticancer effect of KFX, peroxisome proliferator-activated receptor (PPAR)-γ was analyzed by reverse transcription-polymerase chain reaction. Western blot analysis was used to determine the effects of KFX on the expression of cleaved caspase-3, phosphorylated extracellular signal-regulated kinase (p-ERK), ERK, tumor protein p53 (p53), B-cell lymphoma 2 (Bcl-2), Bcl-2 associated X, interleukin (IL)-6 and IL-1β. In addition, terminal deoxynucleotidyl-transferase-mediated dUTP nick-end labeling (TUNEL) analysis was used to detect apoptosis in SGC-7901 cells. It was revealed that PPAR-γ was increased in SGC-7901 cells following treatment with KFX, shown by an increase in mRNA expression. Furthermore, western blot analysis identified that KFX treatment groups exhibited markedly inhibited levels of Bcl-2, IL-6, IL-1β and p-ERK, and induced p53 protein expression. Additionally, TUNEL and MTT assays demonstrated that treatment with KFX may induce SGC-7901 cell apoptosis and inhibit proliferation. In conclusion, to the best of our knowledge, the results of the present study demonstrated for the first time that KFX may induce SGC-7901 cell apoptosis and inhibit its proliferation, and this may be primarily attributed to its role in mitogen-activated protein kinase/extracellular-signal-regulated kinase kinase/ERK signaling pathway inhibition.
Collapse
Affiliation(s)
- Xiuying Ma
- Sichuan Key Laboratory of Medical American Cockroach, Chengdu, Sichuan 610000, P.R. China
| | - Jia Sun
- College of Pharmacy, Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China
| | - Weijian Ye
- The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China
| | - Yewei Huang
- College of Pharmacy, Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China
| | - Congcong Sun
- College of Pharmacy, Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China
| | - Youli Tao
- College of Pharmacy, Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China
| | - Tao Wang
- College of Pharmacy, Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China
| | - Weitao Cong
- College of Pharmacy, Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China
| | - Funeng Geng
- Sichuan Key Laboratory of Medical American Cockroach, Chengdu, Sichuan 610000, P.R. China
| |
Collapse
|
24
|
Liu C, Xie Y, Sun B, Geng F, Zhang F, Guo Q, Wu H, Yu B, Wu J, Yu X, Kong W, Zhang H. MUC1- and Survivin-based DNA Vaccine Combining Immunoadjuvants CpG and interleukin-2 in a Bicistronic Expression Plasmid Generates Specific Immune Responses and Antitumour Effects in a Murine Colorectal Carcinoma Model. Scand J Immunol 2018; 87:63-72. [PMID: 29193199 DOI: 10.1111/sji.12633] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 11/16/2017] [Indexed: 12/30/2022]
Abstract
DNA vaccination is a promising cancer treatment due to its safety, but poor immunogenicity limits its application. However, immunoadjuvants, heterogeneous prime-boost strategies and combination with conventional treatments can be used to improve the antitumour immune effects. A CpG motif and interleukin-2 (IL-2) cytokine are often used as adjuvants. In this study, a DNA vaccine containing a CpG motif was constructed to evaluate its adjuvant effect. The results show that the cytotoxicity of the DNA vaccine was increased fivefold, and survival lifetime was prolonged twofold by the CpG motif adjuvant. To simplify the industrial production process, a bicistronic plasmid was constructed to carry the fusion genes of survivin/MUC1 (MS) and IL-2 and with a CpG motif in its backbone. The results showed that the antitumour effect of the bicistronic vaccine was the same as that of the two vaccine co-injected regime. Furthermore, the vaccine could suppress metastatic tumour foci by 69.1% in colorectal carcinoma-bearing mice. Moreover, the vaccine induced survivin- and MUC1-specific immune responses in splenocytes and induced the immune promoting factor CCL-19 and GM-CSF upregulated, while metastatic-associated factor MMP-9 and immunosuppressing factor PD-L1 downregulated in tumour tissue. When combining the vaccine with the chemotherapy drug oxaliplatin, the survival was prolonged by about 2.5-fold. In conclusion, the DNA vaccine containing a CpG motif in bicistronic form showed good effects on colorectal cancer by inhibiting both tumour growth and metastasis, and combination with oxaliplatin could improve its antitumour effects.
Collapse
Affiliation(s)
- C Liu
- National Engineering Laboratory for AIDS Vaccine, College of Life Science, Jilin University, Changchun, China
| | - Y Xie
- National Engineering Laboratory for AIDS Vaccine, College of Life Science, Jilin University, Changchun, China
| | - B Sun
- National Engineering Laboratory for AIDS Vaccine, College of Life Science, Jilin University, Changchun, China.,Key Laboratory for Molecular enzymology and Engineering, College of Life Science, Jilin University, Changchun, China
| | - F Geng
- National Engineering Laboratory for AIDS Vaccine, College of Life Science, Jilin University, Changchun, China
| | - F Zhang
- National Engineering Laboratory for AIDS Vaccine, College of Life Science, Jilin University, Changchun, China
| | - Q Guo
- National Engineering Laboratory for AIDS Vaccine, College of Life Science, Jilin University, Changchun, China
| | - H Wu
- National Engineering Laboratory for AIDS Vaccine, College of Life Science, Jilin University, Changchun, China.,Key Laboratory for Molecular enzymology and Engineering, College of Life Science, Jilin University, Changchun, China
| | - B Yu
- National Engineering Laboratory for AIDS Vaccine, College of Life Science, Jilin University, Changchun, China.,Key Laboratory for Molecular enzymology and Engineering, College of Life Science, Jilin University, Changchun, China
| | - J Wu
- National Engineering Laboratory for AIDS Vaccine, College of Life Science, Jilin University, Changchun, China.,Key Laboratory for Molecular enzymology and Engineering, College of Life Science, Jilin University, Changchun, China
| | - X Yu
- National Engineering Laboratory for AIDS Vaccine, College of Life Science, Jilin University, Changchun, China.,Key Laboratory for Molecular enzymology and Engineering, College of Life Science, Jilin University, Changchun, China
| | - W Kong
- National Engineering Laboratory for AIDS Vaccine, College of Life Science, Jilin University, Changchun, China.,Key Laboratory for Molecular enzymology and Engineering, College of Life Science, Jilin University, Changchun, China
| | - H Zhang
- National Engineering Laboratory for AIDS Vaccine, College of Life Science, Jilin University, Changchun, China.,Key Laboratory for Molecular enzymology and Engineering, College of Life Science, Jilin University, Changchun, China
| |
Collapse
|
25
|
Shen Y, Sun J, Niu C, Yu D, Chen Z, Cong W, Geng F. Mechanistic evaluation of gastroprotective effects of Kangfuxin on ethanol-induced gastric ulcer in mice. Chem Biol Interact 2017; 273:115-124. [PMID: 28606470 DOI: 10.1016/j.cbi.2017.06.007] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [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: 04/06/2017] [Revised: 05/22/2017] [Accepted: 06/07/2017] [Indexed: 02/06/2023]
Abstract
This study was designed to evaluate the gastroprotective effect of Kangfuxin (KFX), a Chinese patent medicine constituent isolated from American cockroach, on ethanol-induced gastric ulcer in mice and to elucidate the potential mechanisms of the effect involved. According to the results, mice treated with alcohol appeared obvious gastric mucosal injury, while treatment with Cimetidine (a positive control) and KFX significantly relieved the damage, along with decreased oxidative stress and apoptosis indexes. Subsequently, we conducted a label-free quantitative proteomic (LFQ) and found that NF-κB and PI3K/AKT signaling pathway participated in gastroprotective effect of KFX. Furthermore, Western blot analysis revealed that KFX treatment inhibited the expression of TNF-α, IL-1β, greatly reduced the phosphorylation level of IκB and repressed the nuclear translocation of NF-κB p65, which demonstrated that KFX inhibited the activation of NF-κB pathway. Meanwhile, the PI3K/AKT pathway was also involved in regulating the anti-inflammation effect. These findings define for the first time that the gastroprotective effects of KFX against gastric ulcer can be attributed to its role in NF-κB inhibition.
Collapse
Affiliation(s)
- Yongmei Shen
- Sichuan Key Laboratory of Medical American Cockroach, Chengdu, China
| | - Jia Sun
- College of Pharmacy, Wenzhou Medical University, Wenzhou, China
| | - Chao Niu
- College of Pharmacy, Wenzhou Medical University, Wenzhou, China
| | - Dongdong Yu
- College of Pharmacy, Wenzhou Medical University, Wenzhou, China
| | - Zhiwei Chen
- College of Pharmacy, Wenzhou Medical University, Wenzhou, China
| | - Weitao Cong
- College of Pharmacy, Wenzhou Medical University, Wenzhou, China.
| | - Funeng Geng
- Sichuan Key Laboratory of Medical American Cockroach, Chengdu, China.
| |
Collapse
|
26
|
Gao S, Shen Y, Geng F, Li Y, Gao J. [Research progress on the animal models and treatment strategies of diabetic foot ulcer]. Zhejiang Da Xue Xue Bao Yi Xue Ban 2017; 46:97-105. [PMID: 28436638 PMCID: PMC10396950 DOI: 10.3785/j.issn.1008-9292.2017.02.15] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The suitable experimental animal model is important in research of pathogenesis and therapeutic strategies of diabetic foot ulcer, and the murine model is the most commonly used one at present. It can be divided into two types: the animal model simulating pathological conditions and the model simulating clinical symptoms. This article reviews the current research progress on the mechanisms of diabetic ulcer pathogenesis, and relevant treatment strategies, including the inhibition of matrix metalloproteinases (MMPs) expression, promotion of angiogenesis and anti-inflammatory therapy.
Collapse
Affiliation(s)
- Siqian Gao
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yongmei Shen
- Sichuan Gooddoctor Pharmaceutical Group Co., Ltd., Chengdu 610000, China
| | - Funeng Geng
- Sichuan Gooddoctor Pharmaceutical Group Co., Ltd., Chengdu 610000, China
| | - Yanhua Li
- Jiangsu Engineering Research Center for New-Type External and Transdermal Preparations, Changzhou 213000, China
| | - Jianqing Gao
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China; Jiangsu Engineering Research Center for New-Type External and Transdermal Preparations, Changzhou 213000, China.
| |
Collapse
|
27
|
Chen P, Shen Y, Shi H, Ma X, Lin B, Xiao T, Wu F, Zhu J, Li Z, Xiao J, Li X, Zhang H, Geng F. Gastroprotective effects of Kangfuxin-against ethanol-induced gastric ulcer via attenuating oxidative stress and ER stress in mice. Chem Biol Interact 2016; 260:S0009-2797(16)30509-9. [PMID: 27983966 DOI: 10.1016/j.cbi.2016.10.021] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [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: 07/13/2016] [Revised: 10/09/2016] [Accepted: 10/27/2016] [Indexed: 01/19/2023]
Abstract
Oxidative stress and ER stress play a role in the pathogenesis of gastric ulcer. Kangfuxin (KFX) has been used to treat gastric ulcer in patients. However, the underlying mechanisms of KFX action remain unclear. The current study was undertaken to evaluate the gastroprotective effects of KFX and to determine its potential mechanisms. Ethanol-induced gastric ulcer mouse model was employed. Ethanol pretreated mice were treated with low (0.02 g/kg) and high (0.05 g/kg) dose of KFX for 14 days. Cimetidine (0.8 g/kg) was used as positive control. Histological evaluation of the gastric mucosa revealed that mice treated with ethanol exhibited severe gastric mucosal damage. Ethanol treatment increased plasma and gastric MDA level, decreased plasma and gastric SOD activity, and reduced gastric HO-1 and GCL-c mRNA levels. ER stress markers (CHOP, GRP78, and caspase 12) were up-regulated upon ethanol administration. Moreover, increased cell apoptosis and pro-apoptotic protein Bax and caspase 3 were observed in ethanol treated mice, while the anti-apoptotic protein Bcl 2 was inhibited. Finally, KFX treatment reversed ethanol-induced phenotypes and ameliorated gastric ulcer. Our results demonstrated that the gastroprotective effects of KFX against ethanol-induced gastric ulcer could be attributed to its anti-oxidative stress, anti-ER stress and anti-apoptotic effects.
Collapse
Affiliation(s)
- Pianpian Chen
- School of Pharmaceutical Sciences, Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University, Wenzhou, 325035, China
| | - Yongmei Shen
- Sichuan Key Laboratory of Medical American Cockroach, Chengdu, 610000, China
| | - Hongxue Shi
- School of Pharmaceutical Sciences, Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University, Wenzhou, 325035, China
| | - Xiuying Ma
- Sichuan Key Laboratory of Medical American Cockroach, Chengdu, 610000, China
| | - Beibei Lin
- School of Pharmaceutical Sciences, Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University, Wenzhou, 325035, China
| | - Tong Xiao
- School of Pharmaceutical Sciences, Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University, Wenzhou, 325035, China
| | - Fenzan Wu
- Science and Education Division, Cixi People's Hospital, Wenzhou Medical University, Ningbo, 315300, China
| | - Jingjing Zhu
- School of Pharmaceutical Sciences, Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University, Wenzhou, 325035, China
| | - Zhengmao Li
- School of Pharmaceutical Sciences, Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University, Wenzhou, 325035, China
| | - Jian Xiao
- School of Pharmaceutical Sciences, Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University, Wenzhou, 325035, China
| | - Xiaokun Li
- School of Pharmaceutical Sciences, Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University, Wenzhou, 325035, China
| | - Hongyu Zhang
- School of Pharmaceutical Sciences, Key Laboratory of Biotechnology and Pharmaceutical Engineering, Wenzhou Medical University, Wenzhou, 325035, China.
| | - Funeng Geng
- Sichuan Key Laboratory of Medical American Cockroach, Chengdu, 610000, China.
| |
Collapse
|
28
|
Abstract
BACKGROUND Patients with schizophrenia have intact ability to experience emotion, but empirical evidence suggests that they fail to translate emotional salience into effortful behaviour. Previous research in patients with chronic schizophrenia suggests that working memory is important in integrating emotion and behaviour. This study aimed to examine avolition and anhedonia in patients with first-episode schizophrenia and clarify the role of working memory in emotion-behaviour coupling. METHOD We recruited 72 participants with first-episode schizophrenia and 61 healthy controls, and used a validated emotion-inducing behavioural paradigm to measure participants' affective experiences and how experienced emotion coupled with behaviour. Participants were given the opportunity to expend effort to increase or decrease their exposure to emotion-inducing photographs. Participants with schizophrenia having poor working memory were compared with those with intact working memory in their liking and emotion-behaviour coupling. RESULTS Patients with first-episode schizophrenia experienced intact 'in-the-moment' emotion, but their emotion was less predictive of the effort expended, compared with controls. The emotion-behaviour coupling was significantly weaker in patients with schizophrenia with poor working memory than in those with intact working memory. However, compared with controls, patients with intact working also showed substantial emotion-behaviour decoupling. CONCLUSIONS Our findings provide strong evidence for emotion-behaviour decoupling in first-episode schizophrenia. Although working memory deficits contribute to defective translation of liking into effortful behaviour, schizophrenia alone affects emotion-behaviour coupling.
Collapse
Affiliation(s)
- S S Y Lui
- Neuropsychology and Applied Cognitive Neuroscience Laboratory,Key Laboratory of Mental Health,Institute of Psychology,Chinese Academy of Sciences,Beijing,People's Republic of China
| | - A C Y Liu
- Castle Peak Hospital,Hong Kong Special Administration Region,People's Republic of China
| | - W W H Chui
- Castle Peak Hospital,Hong Kong Special Administration Region,People's Republic of China
| | - Z Li
- Neuropsychology and Applied Cognitive Neuroscience Laboratory,Key Laboratory of Mental Health,Institute of Psychology,Chinese Academy of Sciences,Beijing,People's Republic of China
| | - F Geng
- Neuropsychology and Applied Cognitive Neuroscience Laboratory,Key Laboratory of Mental Health,Institute of Psychology,Chinese Academy of Sciences,Beijing,People's Republic of China
| | - Y Wang
- Neuropsychology and Applied Cognitive Neuroscience Laboratory,Key Laboratory of Mental Health,Institute of Psychology,Chinese Academy of Sciences,Beijing,People's Republic of China
| | - E A Heerey
- Psychology Department,Western University,London,Ontario,Canada
| | - E F C Cheung
- Castle Peak Hospital,Hong Kong Special Administration Region,People's Republic of China
| | - R C K Chan
- Neuropsychology and Applied Cognitive Neuroscience Laboratory,Key Laboratory of Mental Health,Institute of Psychology,Chinese Academy of Sciences,Beijing,People's Republic of China
| |
Collapse
|
29
|
Guo D, Geng F, Aggarwal R, Liu J, Yoo JY, Guo Q, Guo JY, Hurwitz B, Ru P, Cheng C, Joshi K, Ichiro N, Kaur B, Chakravarti A. INTERPLAY OF LIPID DROPLETS AND AUTOPHAGY REGULATES GLIOBLASTOMA SURVIVAL. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou206.31] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
30
|
Huang Q, Qiu N, Ma M, Jin Y, Yang H, Geng F, Sun S. Erratum to “Estimation of egg freshness using S-ovalbumin as an indicator” (Poult. Sci. 91(3):739–743). Poult Sci 2012. [DOI: 10.3382/ps.2012-91-4-1044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
31
|
|
32
|
Shi XJ, Geng F, Jiao Z, Cui XY, Qiu XY, Zhong MK. Association of ABCB1, CYP3A4*18B and CYP3A5*3 genotypes with the pharmacokinetics of tacrolimus in healthy Chinese subjects: a population pharmacokinetic analysis. J Clin Pharm Ther 2010; 36:614-24. [DOI: 10.1111/j.1365-2710.2010.01206.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
|
33
|
Geng F, Tan LL, Jin XX, Yang JY, Yang K. The preparation, cytocompatibility, and in vitro biodegradation study of pure beta-TCP on magnesium. J Mater Sci Mater Med 2009; 20:1149-1157. [PMID: 19132512 DOI: 10.1007/s10856-008-3669-x] [Citation(s) in RCA: 39] [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] [Subscribe] [Scholar Register] [Received: 07/18/2008] [Accepted: 12/15/2008] [Indexed: 05/27/2023]
Abstract
Biodegradable and bioactive beta-tricalcium phosphate (beta-TCP) coatings were prepared on magnesium (Mg) in order to improve its biocompatibility by a chemical method. The tensile bonding strength of beta-TCP coating and Mg substrate was measured by the standard adhesion test (ISO 13779-4). And the cytocompatibility of beta-TCP coated Mg was studied by using human osteoblast-like MG63 cells. It was found that the MG63 cells could grow well on the surface of beta-TCP coated Mg and the cell viability on beta-TCP coated Mg was above 80% during the cocultivation of MG63 cells and beta-TCP coated Mg for 10 days, indicating no cytotoxicity. It was concluded that the beta-TCP coated Mg had good cytocompatibility. The degradation of Mg substrate with beta-TCP coating in vitro was studied in detail by XRD, EDX, SEM, and ICP. The results showed that a bone-like apatite continually formed on the surface of the sample with the degradation of both Mg substrate and beta-TCP coating in Hank's solution (a simulated body fluid). The biodegradation mechanism was preliminarily analyzed in the paper.
Collapse
Affiliation(s)
- F Geng
- Institute of Metal Research, Chinese Academy of Sciences, Shenyang, People's Republic of China
| | | | | | | | | |
Collapse
|
34
|
Leung A, Geng F, Daulny A, Collins G, Guzzardo P, Tansey WP. Transcriptional control and the ubiquitin-proteasome system. Ernst Schering Found Symp Proc 2008:75-97. [PMID: 19198065] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Regulation of transcription is a critically important process that controls development, differentiation, and the maintenance of cellular homeostasis. Cells have evolved numerous mechanisms to keep gene transcription tightly in check, some of which involve the ubiquitin-proteasome system. In this chapter, we review evidence supporting the concept that ubiquitin and the proteasome not only control transcription, but provide the biochemical means to drive key steps in the transcription process forward.
Collapse
Affiliation(s)
- A Leung
- Cold Spring Harbor Laboratory, 1 Bungtown Road, Cold Spring Harbor, NY 11724, USA
| | | | | | | | | | | |
Collapse
|
35
|
Abstract
Snf-Swi, the prototypical ATP-dependent nucleosome-remodeling complex, regulates transcription of a subset of yeast genes. With the exception of Snf2p, the ATPase subunit, the functions of the other components are unknown. We have investigated the role of the conserved Snf-Swi core subunit Snf5p through characterization of two conditional snf5 mutants. The mutants contain single amino acid alterations of invariant or conserved residues that abolish Snf-Swi-dependent transcription by distinct mechanisms. One mutation impairs Snf-Swi assembly and, consequently, its stable association with a target promoter. The other blocks a postrecruitment catalytic remodeling step. These findings suggest that Snf5p coordinates the assembly and nucleosome-remodeling activities of Snf-Swi.
Collapse
Affiliation(s)
- F Geng
- Department of Microbiology and Immunology and Morse Institute of Molecular Biology and Genetics, State University of New York, Brooklyn, New York 11203, USA
| | | | | |
Collapse
|
36
|
Abstract
[formula: see text] The Wittig rearrangements of alpha-alkoxysilanes, promoted by the action of methyllithium were studied. Depending on both the substrate and reaction conditions employed, [2,3]-, [1,2]-, or [1,4]-Wittig rearrangements can be realized. These rearrangements were shown to be initiated by either Si/Li exchange or deprotonation alpha to the silane. Furthermore the sigmatropic shifts can often be followed by other synthetically useful in situ chemical events.
Collapse
Affiliation(s)
- R E Maleczka
- Department of Chemistry, Michigan State University, East Lansing 48824, USA.
| | | |
Collapse
|
37
|
Abstract
[formula: see text] Lewis acid-catalyzed reaction of allyl and benzyl trichloroacetimidates with alpha-silyl alcohols was found to be a general method for the synthesis of alpha-alkoxysilanes. Upon exposure to CsF, these alpha-alkoxysilanes could be made to undergo [2,3]-Wittig rearrangement with an efficiency similar to that realized by the analogous but inherently more toxic alpha-alkoxystannanes.
Collapse
Affiliation(s)
- R E Maleczka
- Department of Chemistry, Michigan State University, East Lansing 48824, USA.
| | | |
Collapse
|
38
|
Tian K, Zhou B, Geng F, Jing G. Folding of SNase R begins early during synthesis: the conformational feature of two short N-terminal fragments of staphylococcal nuclease R. Int J Biol Macromol 1998; 23:199-206. [PMID: 9777707 DOI: 10.1016/s0141-8130(98)00049-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [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: 02/09/2023]
Abstract
To further understand the folding of nascent peptide during the early course of peptide synthesis, two short N-terminal fragments of staphylococcal nuclease R (SNase R), SNR52 and SNR79, were made by deleting 97 and 70 amino acid residues from the C-terminus. The conformations of SNR52 and SNR79 were studied by FTIR and far-ultraviolet CD. The results demonstrate that even the short N-terminal fragments of SNase R still have a certain amount of residual ordered secondary structure in the physiological condition. The ordered secondary structures were mainly assigned as beta-strands and turns, which corresponds well to the structures of the N-terminal part in the native protein. The conformational changes during unfolding and refolding in different concentrations of guanidine hydrochloride (GuHCl), monitored by far-ultraviolet CD and intrinsic fluorescence, show that the interaction between amino acid residues, which governs the formation of their conformation are not random. Considered together with earlier studies (Jing et al., Biochim Biophys Acta 1995;1250:189-196; Zhou et al., J Biochem 1996:120: 881-888), the results suggest that the folding of nascent peptide chains begins early in the synthesis process and that the amount of ordered structure increases with increasing peptide chain length until the conformation of the biologically active protein is generated.
Collapse
Affiliation(s)
- K Tian
- National Laboratory of Biomacromolecules, Institute of Biophysics, Academia Sinica, Beijing, People's Republic of China
| | | | | | | |
Collapse
|
39
|
|