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Ye XS, Lin K, Tao XQ, Shang JT, Gui YR, Zhu SX, Xia YY, Chen HF, Sun BL, Liu W, Shu XJ. Discovery of sesquiterpene from Youngia japonica with antitumor effect. Fitoterapia 2024; 174:105869. [PMID: 38378132 DOI: 10.1016/j.fitote.2024.105869] [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: 10/27/2023] [Revised: 01/11/2024] [Accepted: 02/17/2024] [Indexed: 02/22/2024]
Abstract
Fourteen sesquiterpenes, including one undescribed sesquiterpene lactone, were isolated from Youngia japonica, and their structures were identified by NMR, HRESIMS, ECD and calculated ECD. Cytotoxic activities of all isolates against A549, HeLa, and 4 T1 cell lines were detected by CCK8 assay. Among them, 2 showed obvious cytotoxic activity against A549 cells. Subsequently, the production of ROS, and apoptosis of A549 cells treated with 2 were evaluated. The result showed that 2 distinctly increased the ROS level, and induced the apoptosis of A549 cells. Further anticancer mechanism studies showed that 2 increased the expression of cleaved caspase 3. Taken together, our results demonstrated that 2 might become potential leading compounds for the treatment of lung cancer.
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Affiliation(s)
- Xian-Sheng Ye
- Hubei Key Laboratory of Cognitive and Affective Disorders, Institute of Biomedical Sciences, School of Medicine, Jianghan University, Wuhan 430056, China
| | - Kuan Lin
- Hubei Key Laboratory of Cognitive and Affective Disorders, Institute of Biomedical Sciences, School of Medicine, Jianghan University, Wuhan 430056, China
| | - Xiao-Qing Tao
- Hubei Key Laboratory of Cognitive and Affective Disorders, Institute of Biomedical Sciences, School of Medicine, Jianghan University, Wuhan 430056, China
| | - Jin-Ting Shang
- Hubei Key Laboratory of Cognitive and Affective Disorders, Institute of Biomedical Sciences, School of Medicine, Jianghan University, Wuhan 430056, China
| | - Yu-Ran Gui
- Hubei Key Laboratory of Cognitive and Affective Disorders, Institute of Biomedical Sciences, School of Medicine, Jianghan University, Wuhan 430056, China
| | - Shu-Xiu Zhu
- Department of Traditional Chinese Medicine, School of Medicine, Jianghan University, Wuhan 430056, China
| | - Yi-Yuan Xia
- Hubei Key Laboratory of Cognitive and Affective Disorders, Institute of Biomedical Sciences, School of Medicine, Jianghan University, Wuhan 430056, China
| | - Hai-Feng Chen
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, China
| | - Bin-Lian Sun
- Hubei Key Laboratory of Cognitive and Affective Disorders, Institute of Biomedical Sciences, School of Medicine, Jianghan University, Wuhan 430056, China
| | - Wei Liu
- Hubei Key Laboratory of Cognitive and Affective Disorders, Institute of Biomedical Sciences, School of Medicine, Jianghan University, Wuhan 430056, China.
| | - Xi-Ji Shu
- Hubei Key Laboratory of Cognitive and Affective Disorders, Institute of Biomedical Sciences, School of Medicine, Jianghan University, Wuhan 430056, China.
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Ye XS, Tian WJ, Wang GH, Hu LJ, Leng CL, Sun BL, Liu W, Shu XJ, Chen HF. Four undescribed coumarin derivatives, with ten amides from the roots of Ficus hirta and their cytotoxic activities. Bioorg Chem 2024; 144:107116. [PMID: 38237391 DOI: 10.1016/j.bioorg.2024.107116] [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: 10/26/2023] [Revised: 12/07/2023] [Accepted: 01/08/2024] [Indexed: 02/17/2024]
Abstract
Four undescribed coumarin derivatives, ficusalt A (1) and ficusalt B (2), a pair of racemic coumarins, (±) ficudimer A (3a/3b), along with ten known amides, were isolated from the roots of Ficus hirta. Their structures were elucidated by several spectroscopic data analyses, including HRESIMS, NMR, and X-ray single-crystal diffraction. The cytotoxic activities of all compounds against HeLa, HepG2, MCF-7, and H460 cell lines were detected using the MTT assay. Among these, 5 showed the highest activity against HeLa cells. Subsequently, the apoptotic, anti-invasive, and anti-migration effects of 5 on HeLa cells were determined by flow cytometer, transwell invasion assay, and wound-healing assay, respectively. The result suggested that 5 distinctly induced the apoptosis in HeLa cells and inhibited their invasion and migration. Further studies on anticancer mechanisms were conducted using Western blotting. As a result, 5 increased the cleavage of PARP and the expression of pro-apoptotic protein Bax. Moreover, 5 notably upregulated the phosphorylation of p38 and JNK, whereas inhibited the expression of p-ERK and p-AKT. Our results demonstrated that 5 could be a potential leading compound for further application in the treatment of cervical cancer.
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Affiliation(s)
- Xian-Sheng Ye
- Hubei Key Laboratory of Cognitive and Affective Disorders, Institute of Biomedical Sciences, School of Medicine, Jianghan University, Wuhan 430056, China; Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, China
| | - Wen-Jing Tian
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, China
| | - Guang-Hui Wang
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, China
| | - Li-Juan Hu
- Hubei Key Laboratory of Cognitive and Affective Disorders, Institute of Biomedical Sciences, School of Medicine, Jianghan University, Wuhan 430056, China
| | - Chang-Long Leng
- Hubei Key Laboratory of Cognitive and Affective Disorders, Institute of Biomedical Sciences, School of Medicine, Jianghan University, Wuhan 430056, China
| | - Bin-Lian Sun
- Hubei Key Laboratory of Cognitive and Affective Disorders, Institute of Biomedical Sciences, School of Medicine, Jianghan University, Wuhan 430056, China
| | - Wei Liu
- Hubei Key Laboratory of Cognitive and Affective Disorders, Institute of Biomedical Sciences, School of Medicine, Jianghan University, Wuhan 430056, China
| | - Xi-Ji Shu
- Hubei Key Laboratory of Cognitive and Affective Disorders, Institute of Biomedical Sciences, School of Medicine, Jianghan University, Wuhan 430056, China.
| | - Hai-Feng Chen
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, China.
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Ning N, Cai YM, Weng HL, Wang LZ, Wen CL, Zhang JB, Ye XS, Chen X. [Chlamydia trachomatis infection and its associated factors among asymptomatic outpatients attending sexually transmitted disease-related clinics]. Zhonghua Liu Xing Bing Xue Za Zhi 2022; 43:1436-1440. [PMID: 36117351 DOI: 10.3760/cma.j.cn112338-20211015-00796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Objective: To understand the prevalence of Chlamydia trachomatis (CT) infection and its associated factors among asymptomatic outpatients attending sexually transmitted disease (STD)-related clinics in Shenzhen and provide evidence for development of future interventions. Methods: From April 15 to May 16, 2018, a cross-sectional study was conducted and patients attending STD-related Clinics were recruited from 22 medical institutions in Nanshan, Luohu, Bao'an, Longgang, Yantian, and Longhua districts of Shenzhen. After the informed consent from each participant was obtained, social-demographic information was collected through a structured questionnaire and urine samples were collected for CT nucleic acid detection. In addition, logistic regression was used to explore associated factors of CT infection. Results: In asymptomatic outpatients, the prevalence of CT infection was 7.16% (250/3 492). Being single (aOR=2.29, 95%CI:1.65-3.16), without registered Shenzhen residency (aOR=1.49, 95%CI:1.04-2.13), and without previous CT testing in the past year (aOR=2.04, 95%CI:1.03-4.05) were the risk factors of CT infection in asymptomatic outpatients. Among participants without registered Shenzhen residency, 89.25% (2 176/2 438) were college-degree or below, and 51.29% (1 255/2 447) were aged ≤30 years, and the risk of CT infection among those ≤30 years old was 1.73 times higher than those >30 years old (95%CI:1.28-2.34). Conclusions: The prevalence of CT infection was high among asymptomatic outpatients attending STD-related clinics in Shenzhen. Routine CT screening should be carried out for this population, especially for those with sexually active age, being single, with low educational level, and without previous CT testing in the past year. Also, raising their awareness of knowledge and adverse outcomes of CT infection should be considered to promote routine CT screening and timely treatment.
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Affiliation(s)
- N Ning
- Department of Sexually Transmitted Disease and Leprosy Control and Prevention,Shenzhen Center for Chronic Disease Control, Shenzhen 518020,China
| | - Y M Cai
- Department of Sexually Transmitted Disease and Leprosy Control and Prevention,Shenzhen Center for Chronic Disease Control, Shenzhen 518020,China
| | - H L Weng
- Department of Sexually Transmitted Disease and Leprosy Control and Prevention,Shenzhen Center for Chronic Disease Control, Shenzhen 518020,China
| | - L Z Wang
- Department of Sexually Transmitted Disease and Leprosy Control and Prevention,Shenzhen Center for Chronic Disease Control, Shenzhen 518020,China
| | - C L Wen
- Department of Sexually Transmitted Disease and Leprosy Control and Prevention,Shenzhen Center for Chronic Disease Control, Shenzhen 518020,China
| | - J B Zhang
- Department of Sexually Transmitted Disease and Leprosy Control and Prevention,Shenzhen Center for Chronic Disease Control, Shenzhen 518020,China
| | - X S Ye
- Department of Sexually Transmitted Disease and Leprosy Control and Prevention,Shenzhen Center for Chronic Disease Control, Shenzhen 518020,China
| | - Xiangsheng Chen
- National Center for Sexually Transmitted Disease Control, Chinese Center for Disease Control and Prevention, Nanjing 210042, China
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Yan M, Li ZY, Lin X, Ye XS, Qian F, Shi Y, Zhao YL. [Effect of duodenal stump reinforcement on postoperative complications in patients undergoing laparoscopic radical gastrectomy]. Zhonghua Wei Chang Wai Ke Za Zhi 2022; 25:590-595. [PMID: 35844121 DOI: 10.3760/cma.j.cn441530-20210930-00392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Objective: To evaluate the influence of duodenal stump reinforcing on the short-term complications after laparoscopic radical gastrectomy. Methods: A retrospective cohort study with propensity score matching (PSM) was conducted. Clinical data of 1204 patients with gastric cancer who underwent laparoscopic radical gastrectomy at the First Affiliated Hospital of Army Medical University from April 2009 to December 2018 were collected. The digestive tract reconstruction methods included Billroth II anastomosis, Roux-en-Y anastomosis and un-cut-Roux- en-Y anastomosis. A linear stapler was used to transected the stomach and the duodenum. Among 1204 patients, 838 were males and 366 were females with mean age of (57.0±16.0) years. Duodenal stump was reinforced in 792 cases (reinforcement group) and unreinforced in 412 cases (non-reinforcement group). There were significant differences in resection range and anastomotic methods between the two groups (both P<0.001). The two groups were matched by propensity score according to the ratio of 1∶1, and the reinforcement group was further divided into purse string group and non-purse string group. The primary outcome was short-term postoperative complications (within one month after operation). Complications with Clavien-Dindo grade ≥ III a were defined as severe complications, and the morbidity of complication between the reinforcement group and the non-reinforcement group, as well as between the purse string group and the non-purse string group was compared. Results: After PSM, 411 pairs were included in the reinforcement group and the non-reinforcement group, and there were no significant differences in baseline data between the two groups (all P>0.05). No perioperative death occurred in any patient.The short-term morbidity of postoperative complication was 7.4% (61/822), including 14 cases of anastomotic leakage (23.0%), 11 cases of abdominal hemorrhage (18.0%), 8 cases of duodenal stump leakage (13.1%), 2 cases of incision dehiscence (3.3%), 6 cases of incision infection (9.8%) and 20 cases of abdominal infection (32.8%). Short-term postoperative complications were found in 25 patients (6.1%) and 36 patients (8.8%) in the reinforcement group and the non-reinforcement group, respectively, without significant difference (χ2=2.142, P=0.143). Nineteen patients (2.3%) developed short-term severe complications (Clavien-Dindo grade ≥IIIa), while no significant difference in severe complications was found between the two groups (1.7% vs. 2.9%, χ2=1.347, P=0.246). Sub-group analysis showed that the morbidity of short-term postoperative complication of the purse string group was 2.6% (9/345), which was lower than 24.2% (16/66) of the non-purse string group (χ2=45.388, P<0.001). Conclusion: Conventional reinforcement of duodenal stump does not significantly reduce the incidence of duodenal stump leakage, so it is necessary to choose whether to reinforce the duodenal stump individually, and purse string suture should be the first choice when decided to reinforce.
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Affiliation(s)
- M Yan
- Department of General Surgery, the First Hospital Affiliated to Army Medical University, Chongqing 400038, China
| | - Z Y Li
- Department of General Surgery, the First Hospital Affiliated to Army Medical University, Chongqing 400038, China
| | - X Lin
- Department of General Surgery, the First Hospital Affiliated to Army Medical University, Chongqing 400038, China
| | - X S Ye
- Department of General Surgery, the First Hospital Affiliated to Army Medical University, Chongqing 400038, China
| | - F Qian
- Department of General Surgery, the First Hospital Affiliated to Army Medical University, Chongqing 400038, China
| | - Y Shi
- Department of General Surgery, the First Hospital Affiliated to Army Medical University, Chongqing 400038, China
| | - Y L Zhao
- Department of General Surgery, the First Hospital Affiliated to Army Medical University, Chongqing 400038, China
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Ye XS, Lin X, Liu JJ, Shi Y, Qian F, Yu PW, Zhao YL. [Comparison of clinical efficacy and quality of life between uncut Roux-en-Y and Billroth II with Braun anastomosis in laparoscopic distal gastrectomy for gastric cancer]. Zhonghua Wei Chang Wai Ke Za Zhi 2022; 25:166-172. [PMID: 35176829 DOI: 10.3760/cma.j.cn441530-20210702-00257] [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] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To compare the clinical efficacy and quality of life between uncut Roux-en-Y and Billroth II with Braun anastomosis in laparoscopic distal gastrectomy for gastric cancer patients. Methods: A retrospective cohort study was performed. Inclusion criteria: (1) 18 to 75 years old; (2) gastric cancer proved by preoperative gastroscopy, CT and pathological results and tumor was suitable for D2 radical distal gastrectomy; (3) postoperative pathological diagnosis stage was T1-4aN0-3M0 (according to the AJCC-7th TNM tumor stage), and the margin was negative; (4) Eastern Cooperative Oncology Group (ECOG) physical status score <2 points, and American Association of Anesthesiologists (ASA) grade 1 to 3; (5) no mental illness; (6) able to answer questionnaires independently; (7) patients agreed to undergo laparoscopic distal gastrectomy and signed an informed consent. Exclusion criteria: (1) patients with severe chronic diseases and American Association of Anesthesiologists (ASA) grade >3; (2) patients with other malignant tumors; (3) patients suffered from serious mental diseases; (4) patients received neoadjuvant chemotherapy or immunotherapy. According to the above criteria, clinical data of 200 patients who underwent laparoscopic distal gastrectomy at the Department of General Surgery of the First Affiliated Hospital of Army Medical University from January 2016 to December 2019 were collected. Of the 200 patients, 108 underwent uncut Roux-en-Y anastomosis and 92 underwent Billroth II with Braun anastomosis. The general data, intraoperative and postoperative conditions, complications, and endoscopic evaluation 1 year after the surgery were compared. Besides, the quality of life of two groups was also compared using the Chinese version of the European Organization For Research and Treatment of Cancer (EORTC) quality of life questionnaire-Core 30 (QLQ-C30) and quality of life questionnaire-stomach 22 (QLQ-STO22). Results: There were no significant differences in baseline data between the two groups (all P>0.05). All the 200 patients successfully underwent laparoscopic distal gastrectomy without intraoperative complications, conversion to open surgery or perioperative death. There were no significant differences between two groups in operative time, intraoperative blood loss, postoperative complications, time to flatus, time to removal of gastric tube, time to liquid diet, time to removal of drainage tube or length of postoperative hospital stay (all P>0.05). Endoscopic evaluation was conducted 1 year after surgery. Compared to Billroth II with Braun group, the uncut Roux-en-Y group had a significantly lower incidences of gastric stasis [19.8% (17/86) vs. 37.0% (27/73), χ(2)=11.199, P=0.024], gastritis [11.6% (10/86) vs. 34.2% (25/73), χ(2)=20.892, P<0.001] and bile reflux [1.2% (1/86) vs. 28.8% (21/73), χ(2)=25.237, P<0.001], and the differences were statistically significant. The EORTC questionnaire was performed 1 year after surgery, there were no significant differences in the scores of QLQ-C30 scale between the two groups (all P>0.05), while the scores of QLQ-STO22 showed that, compared to the Billroth II with Braun group, the uncut Roux-en-Y group had a lower pain score (median: 8.3 vs. 16.7, Z=-2.342, P=0.019) and reflux score (median: 0 vs 5.6, Z=-2.284, P=0.022), and the differences were statistically significant (all P<0.05), indicating milder symptoms. Conclusion: The uncut Roux-en-Y anastomosis is safe and reliable in laparoscopic distal gastrectomy, which can reduce the incidences of gastric stasis, gastritis and bile reflux, and improve the quality of life of patients after surgery.
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Affiliation(s)
- X S Ye
- Department of General Surgery, The First Affiliated Hospital, The Army Medical University, Chongqing 400038, China
| | - X Lin
- Department of General Surgery, The First Affiliated Hospital, The Army Medical University, Chongqing 400038, China
| | - J J Liu
- Department of General Surgery, The First Affiliated Hospital, The Army Medical University, Chongqing 400038, China
| | - Y Shi
- Department of General Surgery, The First Affiliated Hospital, The Army Medical University, Chongqing 400038, China
| | - F Qian
- Department of General Surgery, The First Affiliated Hospital, The Army Medical University, Chongqing 400038, China
| | - P W Yu
- Department of General Surgery, The First Affiliated Hospital, The Army Medical University, Chongqing 400038, China
| | - Y L Zhao
- Department of General Surgery, The First Affiliated Hospital, The Army Medical University, Chongqing 400038, China
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Feng J, He F, Huang Y, Zhou M, Liu X, Ye XS, Yang R, Tian W, Chen H. Inhibitory effects of phenolic glycosides from Trollius chinensis Bunge on α-glucosidase: inhibition kinetics and mechanism. Food Funct 2022; 13:2857-2864. [DOI: 10.1039/d1fo03347f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two undescribed phenolic glycosides, trochinenols B-C (1-2), together with four known analogues (3-6), were isolated from the functional tea Trollius chinensis Bunge and their α-glucosidase inhibitory kinetics and mechanism were...
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Peng ZC, He J, Pan XG, Zhang J, Wang YM, Ye XS, Xia CY, Lian WW, Yan Y, He XL, Zhang WK, Xu JK. Secoiridoid dimers and their biogenetic precursors from the fruits of Cornus officinalis with potential therapeutic effects on type 2 diabetes. Bioorg Chem 2021; 117:105399. [PMID: 34688131 DOI: 10.1016/j.bioorg.2021.105399] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [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: 07/06/2021] [Revised: 08/30/2021] [Accepted: 09/29/2021] [Indexed: 12/15/2022]
Abstract
Cornusdiridoid A-F (1-6), six unusual cornuside-morroniside secoiridoid dimers, and their possible new biogenetic precursor, 3″,5″-dehydroxycornuside (7), together with four known secoiridoids (8-11), were obtained from the fruits of Cornus officinalis. Their structures were elucidated on the basis of various spectroscopic and chemical methods. A plausible biosynthetic pathway of compounds 1-11 was proposed. The α-glucosidase inhibitory, antioxidant and anti-inflammatory activities of these isolates were evaluated. Some of them emerged out as potent antidiabetic, anti-inflammatory and free radical scavenging agents. Molecular docking was also carried out for antidiabetic target α-glucosidase to investigate the possible binding modes of the most potent α-glucosidase inhibitor, vincosamide (9). These results revealed that the secoiridoids from C. officinalis fruits may be served as new potential antidiabetic agents to prevent and treat type 2 diabetes.
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Affiliation(s)
- Zhong-Can Peng
- School of Life Sciences & School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China; Institute of Clinical Medical Sciences & Department of Pharmacy, China-Japan Friendship Hospital, Beijing 100029, People's Republic of China
| | - Jun He
- Institute of Clinical Medical Sciences & Department of Pharmacy, China-Japan Friendship Hospital, Beijing 100029, People's Republic of China
| | - Xue-Ge Pan
- School of Life Sciences & School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China
| | - Jia Zhang
- School of Life Sciences & School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China
| | - Yu-Ming Wang
- School of Life Sciences & School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China
| | - Xian-Sheng Ye
- School of Life Sciences & School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China
| | - Cong-Yuan Xia
- Institute of Clinical Medical Sciences & Department of Pharmacy, China-Japan Friendship Hospital, Beijing 100029, People's Republic of China
| | - Wen-Wen Lian
- Institute of Clinical Medical Sciences & Department of Pharmacy, China-Japan Friendship Hospital, Beijing 100029, People's Republic of China
| | - Yu Yan
- Institute of Clinical Medical Sciences & Department of Pharmacy, China-Japan Friendship Hospital, Beijing 100029, People's Republic of China
| | - Xiao-Li He
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, People's Republic of China
| | - Wei-Ku Zhang
- Institute of Clinical Medical Sciences & Department of Pharmacy, China-Japan Friendship Hospital, Beijing 100029, People's Republic of China.
| | - Jie-Kun Xu
- School of Life Sciences & School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China.
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Ye XS, Tian WJ, Liu XZ, Zhou M, Zeng DQ, Lin T, Wang GH, Yao XS, Chen HF. Lignans and phenylpropanoids from the roots of Ficus hirta and their cytotoxic activities. Nat Prod Res 2021; 36:3840-3849. [PMID: 33648391 DOI: 10.1080/14786419.2021.1892099] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
One undescribed lignan, one new natural product, along with fourteen known compounds, were isolated from the roots of Ficus hirta. The structures of the isolates were elucidated by comprehensive spectroscopic technologies, including UV, IR, HRESIMS, and NMR. The absolute configuration of 1 was determined by comparison of experimental and calculated ECD data. The cytotoxicity of all the compounds against HeLa and HepG2 cell lines was evaluated and compound 7 showed considerable cytotoxic effect towards HepG2 cells. Also, the apoptotic effect of 7 on HepG2 cells and the effect of 7 on the key proteins (p-JNK and p-p38) in MAPK (Mitogen-activated protein kinases) pathways were studied by flow cytometry and western blotting experiment. As a result, compound 7 induced the apoptosis of HepG2 cells, and dose-dependently increased the phosphorylation of JNK and p38. Thus, 7 might trigger HepG2 cells apoptosis via JNK/p38 MAPK signaling pathway.
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Affiliation(s)
- Xian-Sheng Ye
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen, People's Republic of China
| | - Wen-Jing Tian
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen, People's Republic of China
| | - Xiang-Zhong Liu
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen, People's Republic of China
| | - Mi Zhou
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen, People's Republic of China
| | - De-Quan Zeng
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen, People's Republic of China
| | - Ting Lin
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen, People's Republic of China
| | - Guang-Hui Wang
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen, People's Republic of China
| | - Xin-Sheng Yao
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen, People's Republic of China.,Institute of Traditional Chinese Medicine & Natural Products, Jinan University, Guangzhou, People's Republic of China
| | - Hai-Feng Chen
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen, People's Republic of China
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Ye XS, Tian WJ, Zhou M, Zeng DQ, Lin T, Wang GH, Yao XS, Chen HF. Prenylated flavonoids from Ficus hirta induces HeLa cells apoptosis via MAPK and AKT signaling pathways. Bioorg Med Chem Lett 2021; 38:127859. [PMID: 33609662 DOI: 10.1016/j.bmcl.2021.127859] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 10/28/2020] [Revised: 01/26/2021] [Accepted: 02/05/2021] [Indexed: 01/08/2023]
Abstract
A pair of undescribed enantiomers, (±) ficusflavonid A (1a/1b), along with five known analogues, were isolated from the roots of Ficus hirta. Their structures were determined by the analysis of extensive spectroscopic data (including UV, IR, HRESIMS and NMR). Two enantiomers (1a and 1b) were successfully separated by chiral chromatographic column and their absolute configurations were assigned by the comparison of experimental and calculated ECD data. The cytotoxicity of all the isolates against HeLa, MCF-7, HepG2 and H460 cell lines were evaluated by MTT assay. Among them, 4 suppressed the proliferation of HeLa cells with the IC50 value of 28.88 μM. Furthermore, the apoptotic effect of 4 on HeLa cells and the level of several crucial proteins in AKT/MAPKs signaling pathways were analyzed by flow cytometer and western blot assay. As a result, 4 induced HeLa cell apoptosis in a dose dependent manner and significantly increased the protein levels of p-JNK and p-p38, whereas distinctly reduced the expression of p-AKT, and p-ERK. Thus, compound 4 might induce HeLa cells apoptosis via MAPK and AKT signaling pathways, which could be considered as a potential leading compound for the development of anticancer drugs.
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Affiliation(s)
- Xian-Sheng Ye
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, People's Republic of China
| | - Wen-Jing Tian
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, People's Republic of China
| | - Mi Zhou
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, People's Republic of China
| | - De-Quan Zeng
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, People's Republic of China
| | - Ting Lin
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, People's Republic of China
| | - Guang-Hui Wang
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, People's Republic of China
| | - Xin-Sheng Yao
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, People's Republic of China; Institute of Traditional Chinese Medicine & Natural Products, Jinan University, Guangzhou 510632, People's Republic of China.
| | - Hai-Feng Chen
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, People's Republic of China.
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10
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Wang XY, Ye XS, Gao S, Liu JX, Tian WJ, Wang GH, Chen HF, Lin T. Cytotoxic compound triacremoniate from Marine Fungus Acremonium citrinum. MMF4. Fitoterapia 2020; 147:104766. [PMID: 33130231 DOI: 10.1016/j.fitote.2020.104766] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 10/19/2020] [Accepted: 10/21/2020] [Indexed: 01/12/2023]
Abstract
Two new compounds, triacremoniate (1) and dietziamide C (2) along with known compounds β-Adenosine (3) and acrepyrone A (4) were obtained from the mangrove-derived fungus Acremonium citrinum. MMF4. Their structures were unambiguously determined by extensive spectroscopic methods, including UV, IR, HRESIMS and NMR. Triacremoniate (1) can promote apoptosis of HeLa cells by increasing the PARP cleavage and the phosphorylation of JNK and p38.
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Affiliation(s)
- Xiao-Yao Wang
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361005, People's Republic of China
| | - Xian-Sheng Ye
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361005, People's Republic of China
| | - Shuo Gao
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361005, People's Republic of China
| | - Jin-Xi Liu
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361005, People's Republic of China
| | - Wen-Jing Tian
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361005, People's Republic of China
| | - Guang-Hui Wang
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361005, People's Republic of China
| | - Hai-Feng Chen
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361005, People's Republic of China.
| | - Ting Lin
- Fujian Provincial Key Laboratory of Innovative Drug Target, School of Pharmaceutical Sciences, Xiamen University, Xiamen 361005, People's Republic of China.
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11
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Ye XS, He J, Xu JK, He XL, Xia CY, Yan Y, Lian WW, Zhang WK. Undescribed morroniside-like secoiridoid diglycosides with α-glucosidase inhibitory activity from Corni Fructus. Phytochemistry 2020; 171:112232. [PMID: 31911266 DOI: 10.1016/j.phytochem.2019.112232] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [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: 09/20/2019] [Revised: 12/03/2019] [Accepted: 12/17/2019] [Indexed: 06/10/2023]
Abstract
Corni Fructus, also known as the fruit of Cornus officinalis Sieb. et Zucc., has long been used as a traditional Chinese medicine and is widely consumed as a nutritional food in the form of function drink and wine. Recently, Corni Fructus has attracted considerable interest because of its anti-diabetic effects. A systematic phytochemical investigation of Corni Fructus was performed to find anti-diabetic components, which led to the isolation of 10 unreported iridoid glycosides, cornusdiglycosides A-J (1-8, 9a/9b and 10a/10b). Their chemical structures were determined through spectroscopic analysis (ultraviolet [UV], infrared [IR], high-resolution electrospray ionisation mass spectroscopy [HRESIMS], one-dimensional [1D] and two-dimensional [2D] nuclear magnetic resonance [NMR]). Such morroniside-type diglycosides were first reported from natural sources, and all isolates were evaluated for α-glucosidase inhibitory activity. The results showed that all compounds (1-10) exhibited α-glucosidase (from Saccharomyces cerevisiae) inhibitory activities with IC50 values ranging from 78.9 ± 4.09 to 162.2 ± 9.17 μM, whereas acarbose, the positive control, displayed α-glucosidase inhibitory activity with IC50 value of 118.9 ± 7.89 μM.
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Affiliation(s)
- Xian-Sheng Ye
- Institute of Clinical Medical Sciences & Department of Pharmacy, China-Japan Friendship Hospital, Beijing, 100029, People's Republic of China; School of Life Sciences, Beijing University of Chinese Medicine, Beijing, 100029, People's Republic of China
| | - Jun He
- Institute of Clinical Medical Sciences & Department of Pharmacy, China-Japan Friendship Hospital, Beijing, 100029, People's Republic of China
| | - Jie-Kun Xu
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing, 100029, People's Republic of China
| | - Xiao-Li He
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, People's Republic of China
| | - Cong-Yuan Xia
- Institute of Clinical Medical Sciences & Department of Pharmacy, China-Japan Friendship Hospital, Beijing, 100029, People's Republic of China
| | - Yu Yan
- Institute of Clinical Medical Sciences & Department of Pharmacy, China-Japan Friendship Hospital, Beijing, 100029, People's Republic of China
| | - Wen-Wen Lian
- Institute of Clinical Medical Sciences & Department of Pharmacy, China-Japan Friendship Hospital, Beijing, 100029, People's Republic of China
| | - Wei-Ku Zhang
- Institute of Clinical Medical Sciences & Department of Pharmacy, China-Japan Friendship Hospital, Beijing, 100029, People's Republic of China.
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12
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He J, Xu Y, Xu JK, Ye XS, Zhang XX, Zhang WK. Cornusglucosides A and B, Two New Iridoid Glucosides from the Fruit of Cornus officinalis. Chem Biodivers 2019; 16:e1900421. [PMID: 31487435 DOI: 10.1002/cbdv.201900421] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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: 08/05/2019] [Accepted: 09/05/2019] [Indexed: 11/11/2022]
Abstract
Phytochemical study on the fruit of Cornus officinalis Sieb. et Zucc. yielded two new iridoid glucosides, named cornusglucoside A (1) and cornusglucoside B (2). The structures of 1 and 2 were elucidated via comprehensive NMR and HR-ESI-MS data analysis. Additionally, their inhibitory effects on IL-6-induced STAT3 activation were assessed.
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Affiliation(s)
- Jun He
- Department of Pharmacy & Department of TCM Rheumatism & Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, 100029, P. R. China
| | - Yuan Xu
- Department of Pharmacy & Department of TCM Rheumatism & Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, 100029, P. R. China
| | - Jie-Kun Xu
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing, 100029, P. R. China
| | - Xian-Sheng Ye
- Department of Pharmacy & Department of TCM Rheumatism & Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, 100029, P. R. China.,School of Life Sciences, Beijing University of Chinese Medicine, Beijing, 100029, P. R. China
| | - Xiao-Xiao Zhang
- China Association of Chinese Medicine, Beijing, 100029, P. R. China
| | - Wei-Ku Zhang
- Department of Pharmacy & Department of TCM Rheumatism & Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing, 100029, P. R. China
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13
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He J, Xu JK, Pan XG, Ye XS, Liang YY, Yang GF, Zhang WK. [A new phenylpropanoid glycoside from fruit of Cornus officinalis]. Zhongguo Zhong Yao Za Zhi 2019; 43:4264-4266. [PMID: 30583627 DOI: 10.19540/j.cnki.cjcmm.2018.0113] [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] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Indexed: 11/18/2022]
Abstract
To investigate the chemical compounds from the ripe fruit of Cornus officinalis, a new phenylpropanoid glycoside 1-O-(6'-O-p-hydroxybenzoyl-β-D-glucopyranosyl)-p-phenylpropanol, named cornuphenylpropanoid A (1), were separated and purified by D101 macroporous resin, silica gel and ODS column chromatography. Its structure was extensively determined on basis of ¹H-NMR, ¹³C-NMR, DEPT, HSQC, HMBC and HR-ESI-MS spectroscopic data.
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Affiliation(s)
- Jun He
- Department of Pharmacy, China-Japan Friendship Hospital, Beijing 100029, China
| | - Jie-Kun Xu
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing 100029, China
| | - Xue-Ge Pan
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing 100029, China.,Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing 100029, China
| | - Xian-Sheng Ye
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing 100029, China.,Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing 100029, China
| | - Ying-Ying Liang
- Department of Pharmacy, China-Japan Friendship Hospital, Beijing 100029, China
| | - Ge-Fan Yang
- Xianyang Rainbow High School, Xianyang 712021, China
| | - Wei-Ku Zhang
- Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing 100029, China
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14
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He J, Xu JK, Pan XG, Ye XS, Gao PY, Yan Y, Xu CY, Qiang GF, Du GH, Cheng YC, Zhang WK. Unusual cadinane-type sesquiterpene glycosides with α-glucosidase inhibitory activities from the fruit of Cornus officinalis Sieb. et Zuuc. Bioorg Chem 2018; 82:1-5. [PMID: 30267969 DOI: 10.1016/j.bioorg.2018.09.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [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: 07/23/2018] [Revised: 09/16/2018] [Accepted: 09/17/2018] [Indexed: 10/28/2022]
Abstract
Five novel and rare cadinane-type sesquiterpene glycosides, cornucadinoside A-E (1-5) were isolated from water extract of the fruit of Cornus officinalis Sieb. et Zuuc.. The new chemical structures, together with their absolute configurations, were elucidated on the basis of extensive spectroscopic analysis, including a comparison of their experimental and calculated electronic circular dichroism (ECD) spectra. Their structures, which possess a naphthalene skeleton, are the first report on the occurrence of cadinane sesquiterpene glycosides in Cornus. Additionally, all the compounds exhibited marked α-glucosidase inhibitory activity except for 3in vitro.
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Affiliation(s)
- Jun He
- Department of Pharmacy & Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing 100029, People's Republic of China
| | - Jie-Kun Xu
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China
| | - Xue-Ge Pan
- Department of Pharmacy & Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing 100029, People's Republic of China; School of Life Sciences, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China
| | - Xian-Sheng Ye
- Department of Pharmacy & Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing 100029, People's Republic of China; School of Life Sciences, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China
| | - Pin-Yi Gao
- College of Pharmaceutical and Biotechnology Engineering, Institute of Functional Molecules, Shenyang University of Chemical Technology, Shenyang 110142, People's Republic of China
| | - Yu Yan
- Department of Pharmacy & Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing 100029, People's Republic of China
| | - Chun-Yang Xu
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College and Beijing Key Laboratory of Drug Target and Screening Research, Beijing 100050, People's Republic of China
| | - Gui-Fen Qiang
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College and Beijing Key Laboratory of Drug Target and Screening Research, Beijing 100050, People's Republic of China
| | - Guan-Hua Du
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College and Beijing Key Laboratory of Drug Target and Screening Research, Beijing 100050, People's Republic of China
| | - Yung-Chi Cheng
- Department of Pharmacology, School of Medicine, Yale University, New Haven, CT 06520, USA
| | - Wei-Ku Zhang
- Department of Pharmacy & Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing 100029, People's Republic of China.
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15
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Ye XS, He J, Cheng YC, Zhang L, Qiao HY, Pan XG, Zhang J, Liu SN, Zhang WK, Xu JK. Cornusides A-O, Bioactive Iridoid Glucoside Dimers from the Fruit of Cornus officinalis. J Nat Prod 2017; 80:3103-3111. [PMID: 29140705 DOI: 10.1021/acs.jnatprod.6b01127] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Fifteen new and rare iridoid glucoside dimers, cornusides A-O (1-15), and 10 known iridoid glucosides (16-25) were isolated from the fruit of Cornus officinalis. These new chemical structures were established through spectroscopic analysis (UV, IR, HRESIMS, 1D and 2D NMR). Compounds 1-25 were tested for their inhibitory activities by measuring IL-6-induced STAT3 promoter activity in HepG2 cells, and 3, 12, 17, 22, and 23 showed inhibitory effects, with IC50 values of 11.9, 12.2, 14.0, 7.0, and 6.9 μM, respectively.
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Affiliation(s)
- Xian-Sheng Ye
- School of Life Sciences & School of Chinese Medicine Sciences, Beijing University of Chinese Medicine , Beijing 100029, People's Republic of China
- Institute of Clinical Medical Sciences, China-Japan Friendship Hospital , Beijing 100029, People's Republic of China
| | - Jun He
- Department of Pharmacy, China-Japan Friendship Hospital , Beijing 100029, People's Republic of China
| | - Yung-Chi Cheng
- Department of Pharmacology, Yale University School of Medicine , New Haven, Connecticut 06520, United States
| | - Lei Zhang
- Department of Pharmacy, Beijing Shijitan Hospital, Capital Medical University , Beijing 100038, People's Republic of China
| | - Hao-Yi Qiao
- School of Life Sciences & School of Chinese Medicine Sciences, Beijing University of Chinese Medicine , Beijing 100029, People's Republic of China
| | - Xue-Ge Pan
- School of Life Sciences & School of Chinese Medicine Sciences, Beijing University of Chinese Medicine , Beijing 100029, People's Republic of China
| | - Jia Zhang
- School of Life Sciences & School of Chinese Medicine Sciences, Beijing University of Chinese Medicine , Beijing 100029, People's Republic of China
| | - Shu-Na Liu
- School of Life Sciences & School of Chinese Medicine Sciences, Beijing University of Chinese Medicine , Beijing 100029, People's Republic of China
| | - Wei-Ku Zhang
- Institute of Clinical Medical Sciences, China-Japan Friendship Hospital , Beijing 100029, People's Republic of China
| | - Jie-Kun Xu
- School of Life Sciences & School of Chinese Medicine Sciences, Beijing University of Chinese Medicine , Beijing 100029, People's Republic of China
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16
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He J, Ye XS, Wang XX, Yang YN, Zhang PC, Ma BZ, Zhang WK, Xu JK. Four new iridoid glucosides containing the furan ring from the fruit of Cornus officinalis. Fitoterapia 2017; 120:136-141. [PMID: 28596026 DOI: 10.1016/j.fitote.2017.06.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Revised: 06/02/2017] [Accepted: 06/04/2017] [Indexed: 11/28/2022]
Abstract
Four new and rare iridoid glucosides, cornusfuroside A-D (1-4), containing the furan ring were identified from water extract of the fruit of Cornus officinalis. These new chemical structures were determined through extensive spectroscopic analysis, including 1D and 2D NMR, IR, HRESIMS, experimental and calculated electronic circular dichroism (ECD). Notably, this study is the first report on the isolation of four iridoid glucoside structures with acetal functions in the sugar moiety. The neuroprotective effects of these compounds were also evaluated in vitro.
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Affiliation(s)
- Jun He
- Department of Pharmacy, China-Japan Friendship Hospital, Beijing 100029, People's Republic of China
| | - Xian-Sheng Ye
- Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing 100029, People's Republic of China; School of Chinese Medicine Sciences, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China
| | - Xiao-Xue Wang
- Department of Pharmacy, China-Japan Friendship Hospital, Beijing 100029, People's Republic of China
| | - Ya-Nan Yang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100050, People's Republic of China
| | - Pei-Cheng Zhang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100050, People's Republic of China
| | - Bing-Zhi Ma
- Department of Pharmacy, China-Japan Friendship Hospital, Beijing 100029, People's Republic of China
| | - Wei-Ku Zhang
- Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing 100029, People's Republic of China.
| | - Jie-Kun Xu
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing 100029, People's Republic of China.
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17
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Wang JY, Li ZH, Ye M, Feng Q, Chen ZM, Ye XS, Wu ZG, Wang B, Liu L, Yao J. Effect of miR-29c and miR-129-5p on epithelial-mesenchymal transition in experimental biliary atresia mouse models. Genet Mol Res 2016; 15:gmr7753. [PMID: 27706677 DOI: 10.4238/gmr.15037753] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Biliary atresia (BA) is a destructive bile duct disease occurring in newborn children within a few weeks after birth. In this study, the effect of miR-29c and miR-129-5p on epithelial-mesenchymal transition (EMT) in experimental BA was explored by constructing BA mouse models via Rhesus rotavirus vaccine infection. miR-29c and miR-129-5p expression was analyzed by real-time quantitative polymerase chain reaction. EMT was established by induction with transforming growth factor (TGF)-β1. miR-29c and miR-129-5p were overexpressed and inhibited, respectively, by Lipofectamine transfection. EMT-related protein (formin-like 2, FMNL2; E-cadherin; vimentin; and cytokeratin-19, CK-19) expression was analyzed by western blot and immunofluorescent assay. The results indicated that miR-29c and miR-129-5p were downregulated and upregulated in BA mice. TGF-β1 induction caused a time-dependent decrease and increase in miR-29c and miR-129-5p, respectively. Additionally, TGF-β1 induced an increase in FMNL2 and vimentin expression and a decrease in E-cadherin and CK-19 expression (P < 0.05). Overexpression or suppression of miRNA-29c or miR-129-5p, respectively, induced the inhibition of FMNL2 and vimentin, and promotion of E-cadherin and CK-19 expression, in the test groups compared to the non-intervention group (P < 0.05). However, the FMNL2, vimentin, E-cadherin, and CK- 19 expression did not differ between the control and non-intervention groups (P > 0.05). Thus, miR-29c upregulation or miR-129-5p downregulation effectively prevented EMT in BA by regulating the expression of EMT pathway-related proteins. Therefore, miR-29c and miR-129-5p could be utilized as therapeutic targets for BA in the future.
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Affiliation(s)
- J Y Wang
- Department of General Surgery, Shenzhen Children's Hospital, Shenzhen, Guangdong Province, China
| | - Z H Li
- Department of Radiation Oncology, Jinan University of Medical Sciences, Shenzhen Municipal People's Hospital, Shenzhen, Guangdong Province, China
| | - M Ye
- Department of General Surgery, Shenzhen Children's Hospital, Shenzhen, Guangdong Province, China
| | - Q Feng
- Department of General Surgery, Shenzhen Children's Hospital, Shenzhen, Guangdong Province, China
| | - Z M Chen
- Department of General Surgery, Shenzhen Children's Hospital, Shenzhen, Guangdong Province, China
| | - X S Ye
- Department of General Surgery, Shenzhen Children's Hospital, Shenzhen, Guangdong Province, China
| | - Z G Wu
- Department of General Surgery, Shenzhen Children's Hospital, Shenzhen, Guangdong Province, China
| | - B Wang
- Department of General Surgery, Shenzhen Children's Hospital, Shenzhen, Guangdong Province, China
| | - L Liu
- Department of General Surgery, Shenzhen Children's Hospital, Shenzhen, Guangdong Province, China
| | - J Yao
- Department of Gastroenterology, Jinan University of Medical Sciences, Shenzhen Municipal People's Hospital, Shenzhen, Guangdong Province, China
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18
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Abstract
Prevention of mitosis if DNA is damaged, or not fully replicated, is a widespread mechanism used by eukaryotic cells to maintain their ploidy and prevent accumulation of mutations. Such 'checkpoints' must inhibit mitotic regulators to prevent mitotic progression when DNA is not ready for segregation. The mitotic regulators targeted for negative regulation by these checkpoints differ among cell types, but two conserved targets have emerged, the anaphase-promoting complex (APC) and tyrosine phosphorylation of p34(cdc2). One potential downstream target of both these regulators has also been identified, the mitosis-promoting NIMA kinase.
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19
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Abstract
Sphingolipids are major components of the plasma membrane of eukaryotic cells and were once thought of merely as structural components of the membrane. We have investigated effects of inhibiting sphingolipid biosynthesis, both in germinating spores and growing hyphae of Aspergillus nidulans. In germinating spores, genetic or pharmacological inactivation of inositol phosphorylceramide (IPC) synthase arrests the cell cycle in G(1) and also prevents polarized growth during spore germination. However, inactivation of IPC synthase not only eliminates sphingolipid biosynthesis but also leads to a marked accumulation of ceramide, its upstream intermediate. We therefore inactivated serine palmitoyltransferase, the first enzyme in the sphingolipid biosynthesis pathway, to determine effects of inhibiting sphingolipid biosynthesis without an accumulation of ceramide. This inactivation also prevented polarized growth but did not affect nuclear division of germinating spores. To see if sphingolipid biosynthesis is required to maintain polarized growth, and not just to establish polarity, we inhibited sphingolipid biosynthesis in cells in which polarity was already established. This inhibition rapidly abolished normal cell polarity and promoted cell tip branching, which normally never occurs. Cell tip branching was closely associated with dramatic changes in the normally highly polarized actin cytoskeleton and found to be dependent on actin function. The results indicate that sphingolipids are essential for the establishment and maintenance of cell polarity via control of the actin cytoskeleton and that accumulation of ceramide is likely responsible for arresting the cell cycle in G(1).
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Affiliation(s)
- J Cheng
- Infectious Diseases Research, Lilly Research Laboratories, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana 46285, USA
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20
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Abstract
The assembly of an oligosaccharide library has been achieved in a practical and efficient manner employing a' one-pot sequential approach. With the help of the anomeric reactivity values of thioglycosides, using a thioglycoside (mono- or disaccharide) with one free hydroxyl group as acceptor and donor coupled with another fully protected thioglycoside, a di- or trisaccharide is selectively formed without self-condensation and subsequently reacted in situ with an anomerically inactive glycoside (mono- or disaccharide) to form a tri- or tetrasaccharide in high overall yield. The approach enables the rapid assembly of 33 linear or branched fully protected oligosaccharides using designed building blocks. These fully protected oligosaccharides have been partially or completely deprotected to create 29 more structures to further increase the diversity of the library.
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Affiliation(s)
- X S Ye
- Department of Chemistry, Scripps Research Institute, La Jolla, California 92037, USA
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21
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Ye XS, Lee SL, Wolkow TD, McGuire SL, Hamer JE, Wood GC, Osmani SA. Interaction between developmental and cell cycle regulators is required for morphogenesis in Aspergillus nidulans. EMBO J 1999; 18:6994-7001. [PMID: 10601021 PMCID: PMC1171762 DOI: 10.1093/emboj/18.24.6994] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
In Aspergillus nidulans, mutation of the transcriptional regulator brlA arrests formation of asexual spore-forming structures called conidiophores but does not hinder vegetative hyphal growth. During conidiophore development a 6-fold, brlA-dependent increase in the kinase activities of NIMX(cdc2) and NIMA occurs. A similar level of kinase induction was promoted by ectopic expression of brlA. Northern and Western analysis revealed marked induction of nimX(cdc2) mRNA after ectopic expression of brlA and increased amounts of NIMX(cdc2). Therefore, nimX(cdc2) is developmentally regulated by brlA indicating a direct role for brlA in the regulation of cell cycle genes. That correct regulation of nimX(cdc2) is important for normal development was further supported by analysis of conidiophore development and septation in cell cycle specific mutants. Most noticeably, the nimX(cdc2AF) mutation promoted inappropriate septation and hindered the switch from filamentous growth to budding growth seen during conidiophore development. Therefore, in contrast to the situation previously reported for other multicellular eukaryotes, interaction between developmental regulators and cell cycle regulators is essential for normal morphogenesis in A.nidulans.
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Affiliation(s)
- X S Ye
- Henry Hood Research Program, Weis Center for Research, Pennsylvania State University College of Medicine, Danville, PA 17822, USA
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22
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Abstract
The G2 DNA damage and slowing of S-phase checkpoints over mitosis function through tyrosine phosphorylation of NIMX(cdc2) in Aspergillus nidulans. We demonstrate that breaking these checkpoints leads to a defective premature mitosis followed by dramatic rereplication of genomic DNA. Two additional checkpoint functions, uvsB and uvsD, also cause the rereplication phenotype after their mutation allows premature mitosis in the presence of low concentrations of hydroxyurea. uvsB is shown to encode a rad3/ATR homologue, whereas uvsD displays homology to rad26, which has only previously been identified in Schizosaccharomyces pombe. uvsB(rad3) and uvsD(rad26) have G2 checkpoint functions over mitosis and another function essential for surviving DNA damage. The rereplication phenotype is accompanied by lack of NIME(cyclinB), but ectopic expression of active nondegradable NIME(cyclinB) does not arrest DNA rereplication. DNA rereplication can also be induced in cells that enter mitosis prematurely because of lack of tyrosine phosphorylation of NIMX(cdc2) and impaired anaphase-promoting complex function. The data demonstrate that lack of checkpoint control over mitosis can secondarily cause defects in the checkpoint system that prevents DNA rereplication in the absence of mitosis. This defines a new mechanism by which endoreplication of DNA can be triggered and maintained in eukaryotic cells.
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Affiliation(s)
- C P De Souza
- Henry Hood Research Program, Weis Center for Research, Pennsylvania State University College of Medicine, Danville, Pennsylvania 17822, USA
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23
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Ye XS, Fincher RR, Tang A, Osmani AH, Osmani SA. Regulation of the anaphase-promoting complex/cyclosome by bimAAPC3 and proteolysis of NIMA. Mol Biol Cell 1998; 9:3019-30. [PMID: 9802893 PMCID: PMC25582 DOI: 10.1091/mbc.9.11.3019] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/1998] [Accepted: 08/19/1998] [Indexed: 11/11/2022] Open
Abstract
Surprisingly, although highly temperature-sensitive, the bimA1(APC3) anaphase-promoting complex/cyclosome (APC/C) mutation does not cause arrest of mitotic exit. Instead, rapid inactivation of bimA1(APC3) is shown to promote repeating oscillations of chromosome condensation and decondensation, activation and inactivation of NIMA and p34(cdc2) kinases, and accumulation and degradation of NIMA, which all coordinately cycle multiple times without causing nuclear division. These bimA1(APC3)-induced cell cycle oscillations require active NIMA, because a nimA5 + bimA1(APC3) double mutant arrests in a mitotic state with very high p34(cdc2) H1 kinase activity. NIMA protein instability during S phase and G2 was also found to be controlled by the APC/C. The bimA1(APC3) mutation therefore first inactivates the APC/C but then allows its activation in a cyclic manner; these cycles depend on NIMA. We hypothesize that bimAAPC3 could be part of a cell cycle clock mechanism that is reset after inactivation of bimA1(APC3). The bimA1(APC3) mutation may also make the APC/C resistant to activation by mitotic substrates of the APC/C, such as cyclin B, Polo, and NIMA, causing mitotic delay. Once these regulators accumulate, they activate the APC/C, and cells exit from mitosis, which then allows this cycle to repeat. The data indicate that bimAAPC3 regulates the APC/C in a NIMA-dependent manner.
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Affiliation(s)
- X S Ye
- Henry Hood Research Program, Weis Center for Research, Pennsylvania State University College of Medicine, Danville, Pennsylvania 17822, USA
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Ye XS, Osmani SA. Regulation of p34cdc2/cyclinB H1 and NIMA kinases during the G2/M transition and checkpoint responses in Aspergillus nidulans. Prog Cell Cycle Res 1998; 3:221-32. [PMID: 9552417 DOI: 10.1007/978-1-4615-5371-7_17] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
In A. nidulans, activation of both p34cdc2/cyclinB H1 and NIMA kinases is required to initiate mitosis. These two kinases are regulated at several levels during interphase and are activated independently as protein kinases during G2. They are also targeted for negative regulation, to prevent mitosis by mitotic entry checkpoint controls, when DNA is not replicated or is damaged. Then, to initiate mitosis, they promote each other's mitotic functions to coordinately promote mitosis upon completion of interphase events. In addition, inactivation of both kinases by mitotic specific proteolysis is also required for progression through mitosis into G1.
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Affiliation(s)
- X S Ye
- Henry Hood Research Program, Weis Center for Research, Geisinger Clinic, Danville, PA 17822, USA
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Ye XS, Fincher RR, Tang A, McNeal KK, Gygax SE, Wexler AN, Ryan KB, James SW, Osmani SA. Proteolysis and tyrosine phosphorylation of p34cdc2/cyclin B. The role of MCM2 and initiation of DNA replication to allow tyrosine phosphorylation of p34cdc2. J Biol Chem 1997; 272:33384-93. [PMID: 9407133 DOI: 10.1074/jbc.272.52.33384] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Previously, it has been shown that Aspergillus cells lacking the function of nimQ and the anaphase-promoting complex (APC) component bimEAPC1 enter mitosis without replicating DNA. Here nimQ is shown to encode an MCM2 homologue. Although mutation of nimQMCM2 inhibits initiation of DNA replication, a few cells do enter mitosis. Cells arrested at G1/S by lack of nimQMCM2 contain p34(cdc2)/cyclin B, but p34(cdc2) remains tyrosine dephosphorylated, even after DNA damage. However, arrest of DNA replication using hydroxyurea followed by inactivation of nimQMCM2 and bimEAPC1 does not abrogate the S phase arrest checkpoint over mitosis. nimQMCM2, likely via initiation of DNA replication, is therefore required to trigger tyrosine phosphorylation of p34(cdc2) during the G1 to S transition, which may occur by inactivation of nimTcdc25. Cells lacking both nimQMCM2 and bimEAPC1 are deficient in the S phase arrest checkpoint over mitosis because they lack both tyrosine phosphorylation of p34(cdc2) and the function of bimEAPC1. Initiation of DNA replication, which requires nimQMCM2, is apparently critical to switch mitotic regulation from the APC to include tyrosine phosphorylation of p34(cdc2) at G1/S. We also show that cells arrested at G1/S due to lack of nimQMCM2 continue to replicate spindle pole bodies in the absence of DNA replication and can undergo anaphase in the absence of APC function.
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Affiliation(s)
- X S Ye
- Henry Hood Research Program, Weis Center for Research, Pennsylvania State University College of Medicine, Danville, Pennsylvania 17822, USA
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Ye XS, Fincher RR, Tang A, Osmani SA. The G2/M DNA damage checkpoint inhibits mitosis through Tyr15 phosphorylation of p34cdc2 in Aspergillus nidulans. EMBO J 1997; 16:182-92. [PMID: 9009279 PMCID: PMC1169625 DOI: 10.1093/emboj/16.1.182] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
It is possible to cause G2 arrest in Aspergillus nidulans by inactivating either p34cdc2 or NIMA. We therefore investigated the negative control of these two mitosis-promoting kinases after DNA damage. DNA damage caused rapid Tyr15 phosphorylation of p34cdc2 and transient cell cycle arrest but had little effect on the activity of NIMA. Dividing cells deficient in Tyr15 phosphorylation of p34cdc2 were sensitive to both MMS and UV irradiation and entered lethal premature mitosis with damaged DNA. However, non-dividing quiescent conidiospores of the Tyr15 mutant strain were not sensitive to DNA damage. The UV and MMS sensitivity of cells unable to tyrosine phosphorylate p34cdc2 is therefore caused by defects in DNA damage checkpoint regulation over mitosis. Both the nimA5 and nimT23 temperature-sensitive mutations cause an arrest in G2 at 42 degrees C. Addition of MMS to nimT23 G2-arrested cells caused a marked delay in their entry into mitosis upon downshift to 32 degrees C and this delay was correlated with a long delay in the dephosphorylation and activation of p34cdc2. Addition of MMS to nimA5 G2-arrested cells caused inactivation of the H1 kinase activity of p34cdc2 due to an increase in its Tyr15 phosphorylation level and delayed entry into mitosis upon return to 32 degrees C. However, if Tyr15 phosphorylation of p34cdc2 was prevented then its H1 kinase activity was not inactivated upon MMS addition to nimA5 G2-arrested cells and they rapidly progressed into a lethal mitosis upon release to 32 degrees C. Thus, Tyr15 phosphorylation of p34cdc2 in G2 arrests initiation of mitosis after DNA damage in A. nidulans.
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Affiliation(s)
- X S Ye
- The Weis Center for Research, Geisinger Clinic, Danville, PA 17822, USA
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Affiliation(s)
- X S Ye
- Weis Center for Research, Geisinger Clinic, Danville, Pennsylvania 17822, USA
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Abstract
Great progress has recently been made in our understanding of the regulation of the eukaryotic cell cycle, and the central role of cyclin-dependent kinases is now clear. In Aspergillus nidulans it has been established that a second class of cell-cycle-regulated protein kinases, typified by NIMA (encoded by the nimA gene), is also required for cell cycle progression into mitosis. Indeed, both p34cdc2/cyclin B and NIMA have to be correctly activated before mitosis can be initiated in this species, and p34cdc2/cyclin B plays a role in the mitosis-specific activation of NIMA. In addition, both kinases have to be proteolytically destroyed before mitosis can be completed. NIMA-related kinases may also regulate the cell cycle in other eukaryotes, as expression of NIMA can promote mitotic events in yeast, frog or human cells. Moreover, dominant-negative versions of NIMA can adversely affect the progression of human cells into mitosis, as they do in A. nidulans. The ability of NIMA to influence mitotic regulation in human and frog cells strongly suggests the existence of a NIMA pathway of mitotic regulation in higher eukaryotes. A growing number of NIMA-related kinases have been isolated from organisms ranging from fungi to humans, and some of these kinases are also cell-cycle-regulated. How NIMA-related kinases and cyclin-dependent kinases act in concert to promote cell cycle transitions is just beginning to be understood. This understanding is the key to a full knowledge of cell cycle regulation.
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Affiliation(s)
- S A Osmani
- Weis Center for Research, Geisinger Clinic, Danville, PA 17822-2617, USA
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Ye XS, Fincher RR, Tang A, O'Donnell K, Osmani SA. Two S-phase checkpoint systems, one involving the function of both BIME and Tyr15 phosphorylation of p34cdc2, inhibit NIMA and prevent premature mitosis. EMBO J 1996; 15:3599-610. [PMID: 8670863 PMCID: PMC451970] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
We demonstrate that there are at least two S-phase checkpoint mechanisms controlling mitosis in Aspergillus. The first responds to the rate of DNA replication and inhibits mitosis via tyrosine phosphorylation of p34cdc2. Cells unable to tyrosine phosphorylate p34cdc2 are therefore viable but are unable to tolerate low levels of hydroxyurea and prematurely enter lethal mitosis when S-phase is slowed. However, if the NIMA mitosis-promoting kinase is inactivated then non-tyrosine-phosphorylated p34cdc2 cannot promote cells prematurely into mitosis. Lack of tyrosine-phosphorylated p34cdc2 also cannot promote mitosis, or lethality, if DNA replication is arrested, demonstrating the presence of a second S-phase checkpoint mechanism over mitotic initiation which we show involves the function of BIME. In order to overcome the S-phase arrest checkpoint over mitosis it is necessary both to prevent tyrosine phosphorylation of p34cdc2 and also to inactivate BIME. Lack of tyrosine phosphorylation of p34cdc2 allows precocious expression of NIMA during S-phase arrest, and lack of BIME then allows activation of this prematurely expressed NIMA by phosphorylation. The mitosis-promoting NIMA kinase is thus a target for S-phase checkpoint controls.
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Affiliation(s)
- X S Ye
- Weis Center for Research, Geisinger Clinic, Danville, PA 17822-2617, USA
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Pu RT, Xu G, Wu L, Vierula J, O'Donnell K, Ye XS, Osmani SA. Isolation of a functional homolog of the cell cycle-specific NIMA protein kinase of Aspergillus nidulans and functional analysis of conserved residues. J Biol Chem 1995; 270:18110-6. [PMID: 7629122 DOI: 10.1074/jbc.270.30.18110] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
To investigate the degree of conservation of the cell cycle-specific NIMA protein kinase of Aspergillus nidulans, and to help direct its functional analysis, we cloned a homolog (designated nim-1) from Neurospora crassa. Over the catalytic domain NIM-1 is 75% identical to NIMA, but overall the identity drops to 52%. nim-1 was able to functionally complement nimA5 in A. nidulans. Mutational analysis of potential activating phosphorylation sites found in NIMA, NIM-1, and related protein kinases was performed on NIMA. Mutation of threonine 199 (conserved in all NIMA-related kinases) inhibited NIMA beta-casein kinase activity and abolished its in vivo function. This site conforms to a minimal consensus phosphorylation site for NIMA (FXXT) and is analogous to the autophosphorylation site of cyclic-AMP-dependent protein kinases. However, mutation of a unique cysteine residue found only in the catalytic site of NIMA and NIM-1 had no effect on NIMA kinase activity or function. Three temperature-sensitive alleles of nimA that cause arrest in G2 were sequenced and shown to generate three different amino acid substitutions. None of the mutations prevented accumulation of NIMA protein during G2 arrest, but all prevented the p34cdc2/cyclin B-dependent phosphorylation of NIMA normally seen during mitotic initiation even though p34cdc2/cyclin B H1 kinase activity was fully activated.
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Affiliation(s)
- R T Pu
- Weis Center for Research, Geisinger Clinic, Danville, Pennsylvania 17822-2617, USA
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31
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Ye XS, Xu G, Pu RT, Fincher RR, McGuire SL, Osmani AH, Osmani SA. The NIMA protein kinase is hyperphosphorylated and activated downstream of p34cdc2/cyclin B: coordination of two mitosis promoting kinases. EMBO J 1995; 14:986-94. [PMID: 7889944 PMCID: PMC398170 DOI: 10.1002/j.1460-2075.1995.tb07079.x] [Citation(s) in RCA: 106] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Initiation of mitosis in Aspergillus nidulans requires activation of two protein kinases, p34cdc2/cyclin B and NIMA. Forced expression of NIMA, even when p34cdc2 was inactivated, promoted chromatin condensation. NIMA may therefore directly cause mitotic chromosome condensation. However, the mitosis-promoting function of NIMA is normally under control of p34cdc2/cyclin B as the active G2 form of NIMA is hyperphosphorylated and further activated by p34cdc2/cyclin B when cells initiate mitosis. To see the p34cdc2/cyclin B dependent activation of NIMA, okadaic acid had to be added to isolation buffers to prevent dephosphorylation of NIMA during isolation. Hyperphosphorylated NIMA contained the MPM-2 epitope and, in vitro, phosphorylation of NIMA by p34cdc2/cyclin B generated the MPM-2 epitope, suggesting that NIMA is phosphorylated directly by p34cdc2/cyclin B during mitotic initiation. These two kinases, which are both essential for mitotic initiation, are therefore independently activated as protein kinases during G2. Then, to initiate mitosis, we suggest that each activates the other's mitosis-promoting functions. This ensures that cells coordinately activate p34cdc2/cyclin B and NIMA to initiate mitosis only upon completion of all interphase events. Finally, we show that NIMA is regulated through the cell cycle like cyclin B, as it accumulates during G2 and is degraded only when cells traverse mitosis.
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Affiliation(s)
- X S Ye
- Weis Center For Research, Geisinger Clinic, Danville, PA 17822-2617
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Abstract
A procedure to assay isozymes of beta-1,3-glucanase directly on polyacrylamide gel electrophoresis (PAGE) and isoelectrofocusing (IEF) gels by using 2,3,5-triphenyltetrazolium chloride is described. The reagent reacts with reducing sugars released by beta-1,3-glucanases from the substrate laminarin. Acidic and neutral isozymes of beta-1,3-glucanase were detected and quantified on 17.5% native PAGE gels run with an anodic buffer system. A significant linear relationship (alpha = less than 0.01, R = 0.991) was observed between amounts of beta-1,3-glucanase loaded and intensity of bands stained with the reagent on native PAGE gels. A full isozyme pattern was obtained on 7.5% IEF gels with a pH range of 3.5-9.5. The IEF gels were heated in a microwave oven during the staining process to minimize diffusion.
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Affiliation(s)
- S Q Pan
- Department of Plant Pathology, University of Kentucky, Lexington 40546
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