1
|
Yang Y, Han YC, Cao Q, Wang X, Wei XD, Shang MD, Zhang XG, Li X, Hu B, Tian CY, Yang ZL, Liu KH, Wang JQ. SPOP negatively regulates mTORC1 activity by ubiquitinating Sec13. Cell Signal 2024; 116:111060. [PMID: 38242269 DOI: 10.1016/j.cellsig.2024.111060] [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: 10/30/2023] [Revised: 01/04/2024] [Accepted: 01/16/2024] [Indexed: 01/21/2024]
Abstract
The mammalian target of rapamycin complex1 (mTORC1) can response to amino acid to regulate metabolism and cell growth. GATOR2 act as important role in amino acid mediated mTORC1 signaling pathway by repressing GTPase activity (GAP) of GATOR1. However, it is still unclear how GATOR2 regulates mTORC1 signaling pathway. Here, we found that K63-ubiquitination of Sce13, one component of GATOR2, suppresses the mTORC1 activity by lessening the inter-interaction of GATOR2. Mechanistically, the ubiquitination of Sec13 was mediated by SPOP. Subsequently, the ubiquitination of Sec13 attenuated its interaction with the other component of GATOR2, thus suppressing the activity of mTORC1. Importantly, the deficiency of SPOP promoted the faster proliferation and migration of breast cancer cells, which was attenuated by knocking down of Sec13. Therefore, SPOP can act as a tumor suppressor gene by negatively regulating mTORC1 signaling pathway.
Collapse
Affiliation(s)
- Yong Yang
- The First School of Clinical Medicine, Binzhou Medical University, Binzhou, Shandong 256603, China
| | - Yan-Chun Han
- School of Basic Medical, Binzhou Medical University, Yantai, Shandong 264003, China
| | - Qi Cao
- School of Basic Medical, Binzhou Medical University, Yantai, Shandong 264003, China
| | - Xi Wang
- School of Basic Medical, Binzhou Medical University, Yantai, Shandong 264003, China
| | - Xiao-Dan Wei
- School of Basic Medical, Binzhou Medical University, Yantai, Shandong 264003, China
| | - Meng-Di Shang
- Peninsular Cancer Research Center, Binzhou Medical University, Yantai, Shandong 264003, China
| | - Xiao-Gang Zhang
- School of Rehabilitation Medicine, Binzhou Medical University, Yantai, Shandong 264003, China
| | - Xiao Li
- Yantai Medical University Hospital, Binzhou Medical University, Yantai, Shandong 264003, China
| | - Bin Hu
- The First School of Clinical Medicine, Binzhou Medical University, Binzhou, Shandong 256603, China
| | - Cheng-Yang Tian
- The First School of Clinical Medicine, Binzhou Medical University, Binzhou, Shandong 256603, China
| | - Zhen-Lin Yang
- The First School of Clinical Medicine, Binzhou Medical University, Binzhou, Shandong 256603, China.
| | - Ke-Hui Liu
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.
| | - Jiu-Qiang Wang
- Peninsular Cancer Research Center, Binzhou Medical University, Yantai, Shandong 264003, China.
| |
Collapse
|
2
|
Ji P, Cao T, Zhang Z, Zheng Z, Liang M, Tian CY, Hao T, Chen LL, Hu DH, Han JT, Tao K. [Effects of the anterolateral thigh chimeric perforator flaps in repairing complex wounds of foot and ankle]. Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi 2023; 39:926-932. [PMID: 37899557 DOI: 10.3760/cma.j.cn501225-20230627-00232] [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: 10/31/2023]
Abstract
Objective: To investigate the effects of anterolateral thigh chimeric perforator flap in repairing complex wounds of foot and ankle. Methods: A retrospective observational study was conducted. From May 2018 to June 2022, 23 patients who met the inclusion criteria were admitted to the First Affiliated Hospital of Air Force Medical University to repair complex wounds of foot and ankle with anterolateral thigh chimeric perforator flaps, including 15 males and 8 females, aged from 20 to 66 years. The wounds were all accompanied by bone exposure and defects, and were complicated with varying degrees of infection. All patients underwent debridement and continuous vacuum sealing drainage treatment for 1 week in stage Ⅰ, with the skin and soft tissue defect area after debridement being 10 cm×5 cm to 22 cm×7 cm. In stage Ⅱ, the anterolateral thigh chimeric perforator flap was used to cover the defective wound, of which the muscle flap was used to fill the deep invalid cavity of the ankle joint or cover bone and internal fixation exposures, and the skin flap was used to cover the superficial wound, with the area of the skin flap ranging from 11 cm×6 cm to 23 cm×8 cm, and the area of the muscle flap ranging from 4.0 cm×2.5 cm to 8.0 cm×5.0 cm. The survival of the flap was observed after operation. During follow-up, the color, texture, appearance, and complications of the flap were observed, the function of ankle joint and its range of dorsiflexion motion and plantar flexion motion were measured, and the scar hyperplasia and muscular hernia in donor area were observed. Results: Ecchymosis and epidermal necrosis occurred at the tip of the flap in 1 patient on 5 days after operation and healed after dressing change for 1 week; the other flaps of patients survived successfully. After 6 to 40 months of follow-up, the color, texture, and shape of flaps were good, but 1 patient was not satisfied with the shape of the flap because of flap swelling; the ankle joint movement was basically normal, the dorsiflexion motion was 15-30°, and the plantar flexion motion was 20-45°; the scar hyperplasia in the donor area of the flap was not obvious, and no muscular hernia occurred. Conclusions: The anterolateral thigh chimeric perforator flap can effectively fill the deep invalid cavity of ankle joint and cover the superficial wound at the same time, with minimal damage to the donor site. So it is an ideal flap for repairing the complex wounds of foot and ankle.
Collapse
Affiliation(s)
- P Ji
- Department of Burns and Cutaneous Surgery, Burn Center of PLA, the First Affiliated Hospital of Air Force Medical University, Xi'an 710032, China
| | - T Cao
- Department of Burns and Cutaneous Surgery, Burn Center of PLA, the First Affiliated Hospital of Air Force Medical University, Xi'an 710032, China
| | - Z Zhang
- Department of Burns and Cutaneous Surgery, Burn Center of PLA, the First Affiliated Hospital of Air Force Medical University, Xi'an 710032, China
| | - Z Zheng
- Department of Burns and Cutaneous Surgery, Burn Center of PLA, the First Affiliated Hospital of Air Force Medical University, Xi'an 710032, China
| | - M Liang
- Department of Burns and Cutaneous Surgery, Burn Center of PLA, the First Affiliated Hospital of Air Force Medical University, Xi'an 710032, China
| | - C Y Tian
- Department of Burns and Cutaneous Surgery, Burn Center of PLA, the First Affiliated Hospital of Air Force Medical University, Xi'an 710032, China
| | - T Hao
- Department of Burns and Cutaneous Surgery, Burn Center of PLA, the First Affiliated Hospital of Air Force Medical University, Xi'an 710032, China
| | - L L Chen
- Department of Orthopedics, Xingping People's Hospital, Xingping 713100, China
| | - D H Hu
- Department of Burns and Cutaneous Surgery, Burn Center of PLA, the First Affiliated Hospital of Air Force Medical University, Xi'an 710032, China
| | - J T Han
- Department of Burns and Cutaneous Surgery, Burn Center of PLA, the First Affiliated Hospital of Air Force Medical University, Xi'an 710032, China
| | - K Tao
- Department of Wound Repair, Center for Wound Repair and Regenerative Medicine, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325015, China
| |
Collapse
|
3
|
Ning Y, Chen GH, Yang JG, Yang YJ, Tian CY, Wang Y, Xu HY. P4621Incidence, management, and in-hospital mortality of cardiogenic shock complicating ST-elevated myocardial infarction in China: insights from the China Acute Myocardial Infarction Registry. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz745.1003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background and purpose
Limited data is available on the situation of cardiogenic shock (CS) complicating ST-elevated myocardial infarction (STEMI) in China. This study aims to disclose the incidence, management and in-hospital mortality (IHM) of patients with STEMI complicated by CS (STEMICS) in China and at different levels of hospitals.
Methods
We queried the 2013–2016 China Acute Myocardial Infarction (CAMI) registry databases to identify patients with STEMI and/or CS (developing before or during hospitalization). The overall and different hospital-level incidence of STEMICS and IHM were analyzed.
Results
Of 28230 STEMI patients, 2273 patients (8.05%) had CS. The incidence of STEMICS in provincial, prefectural and county-level hospitals were 5.23%, 8.46% and 13.76% (p<0.001), respectively. Primary PCI (PPCI) was performed on 675 patients (29.7%) with STEMICS. The proportion of STEMICS patients undertaking PPCI in provincial, prefectural and county-level hospitals were 46.53%, 31.48% and 8.00% (p<0.001). The overall IHM rate of patients with STEMICS was 49.8% with no difference among the different hospital levels. However, the IHM rate of prehospital STEMICS in county-level hospitals were significantly higher than that in prefectural and provincial hospitals (42.3% versus 33.3% and 28.3%, respectively; p<0.01), while that of in-hospital STEMICS were similar among the different hospital levels (66.5%, 66.9% and 62.2%; provincial, prefectural and county-level hospitals, respectively). After adjustment, the difference of IHM in prehospital STEMICS between county-level hospitals and the other two levels no longer existed. However, once PPCI was excluded from the multivariable adjustment model, the IHM of prehospital STEMICS remained higher in county-level hospitals.
Table 1. Differences in IHM of prehospital STEMICS between county-level hospitals and other two levels of hospitals before or after adjustment Provincial hospitals/ County-level hospitals Prefectural hospitals/ County-level hospitals Unadjusted OR (95% CI) 0.54 (0.36, 0.80); P=0.0019 0.68 (0.49, 0.94); P=0.0193 Adjusted OR* (95% CI) 0.63 (0.34, 1.17); P=0.1455 0.64 (0.38, 1.08); P=0.0962 Adjusted OR† (95% CI) 0.49 (0.27, 0.90); P=0.0214 0.54 (0.32, 0.91); P=0.0198 IHM: in-hospital mortality; OR: odd ratio; CI: confidence interval. *Adjusted for baseline characteristics, in-hospital medications and primary PCI; †adjusted for baseline characteristics and in-hospital medications.
Figure 1. Flowchart
Conclusion
The overall incidence and IHM rate of STEMICS in China are still high. Especially, higher IHM rate of prehospital STEMICS is observed in county-level hospitals, which may be attributed to the lower implementation rate of PPCI.
Acknowledgement/Funding
CAMS Innovation Fund for Medical Sciences (CIFMS) (2016-I2M-1-009)
Collapse
Affiliation(s)
- Y Ning
- Fuwai Hospital- Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - G H Chen
- Fuwai Hospital- Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - J G Yang
- Fuwai Hospital- Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Y J Yang
- Fuwai Hospital- Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - C Y Tian
- Fuwai Hospital- Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Y Wang
- Fuwai Hospital- Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - H Y Xu
- Fuwai Hospital- Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| |
Collapse
|
4
|
Song CX, Fu R, Dou KF, Yang JG, Xu HY, Gao XJ, Tian CY, Yang YJ. P819The association between body mass index and in-hospital mortality risk among contemporary patients with acute myocardial infarction, an analysis based on China acute myocardial infarction registry. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy564.p819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- C X Song
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Clinical cardiology, Beijing, China People's Republic of
| | - R Fu
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Clinical cardiology, Beijing, China People's Republic of
| | - K F Dou
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Clinical cardiology, Beijing, China People's Republic of
| | - J G Yang
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Clinical cardiology, Beijing, China People's Republic of
| | - H Y Xu
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Clinical cardiology, Beijing, China People's Republic of
| | - X J Gao
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Clinical cardiology, Beijing, China People's Republic of
| | - C Y Tian
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Clinical cardiology, Beijing, China People's Republic of
| | - Y J Yang
- Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Clinical cardiology, Beijing, China People's Republic of
| | | |
Collapse
|
5
|
Tian CY, Sha L, Liu CH, Luo YQ, Li S, Zhao MY, Wang W, Chen YZ. [A follow-up study of six years' outcome of children with asthma in urban area of Beijing]. Zhonghua Er Ke Za Zhi 2018. [PMID: 29518830 DOI: 10.3760/cma.j.issn.0578-1310.2018.03.009] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To understand the outcome of asthma in children from urban area of Beijing and the factors associated with the outcome. Methods: A total of 497 children with asthma diagnosed in the epidemiological survey of childhood asthma in urban area of Beijing in 2010 were selected in this study. Telephone follow-up was conducted in 2016 to obtain information about asthma attack, emergency visit, hospitalization, medication and disease control, and data of comorbidities of allergic diseases from 1 year earlier. Enumeration data were compared using chi-square test, measurement data were compared by rank sum test. The multi-factor logistic regression analysis was employed for the relationship between the related factors and asthma, Kaplan-Meier survival analysis and COX regression was employed to understand the relationship between the related factors and the course of the disease. Results: Questionnaires were conducted in 366 children, of whom 66.7% (244/366) were male, and 33.3% (122/366) were female.Compared with 2010, the rate of asthma attack and emergency room visits in children in last 12 months were significantly lower (19.1%(70/366) vs. 57.1%(284/497), and 3.0% (11/366) vs.19.7% (98/497), χ(2)=125.910 and 53.352, both P<0.01). There was no significant change in the proportion of allergic rhinitis and atopic dermatitis in last 12 months compared with that 6 years ago (both P>0.05). The number of children with clinical remission (2 years and above) was 75.4% (276/366). The number of children without remission within 2 years was 24.6% (90/366). The majority of children without remission were less than 12 years old boys (52.4% (33/63) vs. 30.9% (56/181) , χ(2)=9.273, P<0.01) . The proportion of children without remission associated with allergic rhinitis (67.8%(61/90)), atopic dermatitis (30.0%(27/90)), first-degree relatives with asthma (68.9%(62/90)) was higher than that of children with remission (51.8%(143/276), 17.0%(47/276), and 54.7%(151/276), respectively, χ(2)=7.013, 7.079, 5.608, respectively, all P<0.05). The proportion of children without remission who used control drugs was (33.3%(30/90)), which was higher than that in children with remission (7.2%(20/276), χ(2)=39.158, P<0.01). Multiple logistic regression showed that boy (OR=2.402 (1.611-3.580), P<0.05), later onset (OR=4.339 (>3-6 years old vs. 0-3 years old), OR=2.630(>6 years old vs. 0-3 years old), χ(2)=18.512, 31.371, 6.510, all P<0.05) were independent risk factors for asthma remission. COX regression analysis showed that the use of control drugs (HR=0.705 (0.515-0.964), χ(2)=4.795, P<0.05) was the relevant factor in the course of the disease. Conclusions: With the increase of age, the incidence of asthma in children in Beijing city in recent 12 months reduced. Male and late onsets were independent risk factors for asthma remission. The use of control drugs was the relevant factor in the course of the disease.
Collapse
Affiliation(s)
- C Y Tian
- Center for Asthma Prevention and Education, Capital Institute of Pediatrics, Beijing 100020, China
| | | | | | | | | | | | | | | |
Collapse
|
6
|
Bao XB, Hu XH, Tian CY, Ji YH, Chen SN, Qiu HY, Sun AN, Wu DP. [Establishment and assessment of a nomogram for predicting the differentiation syndrome of acute promyelocytic leukemia]. Zhonghua Xue Ye Xue Za Zhi 2016; 37:961-965. [PMID: 27995881 PMCID: PMC7348516 DOI: 10.3760/cma.j.issn.0253-2727.2016.11.007] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Indexed: 11/25/2022]
Abstract
Objective: By analyzing the risk factors for occurrence of differentiation syndrome (DS) during induction therapy in newly-diagnosed acute promyelocytic leukemia (APL) patients, a prediction nomogram for DS was established and the accuracy of this nomogram was validated. Methods: The modeling group was made up of 130 classical APL patients during the period of 1st January 2011 to 31st December 2013. After single factor screening of clinical variables, the logistic regression model was used to identify the final model variables. A nomogram subsequently established by R software was validated by Bootstrap resampling as internal validation. Concordance index (C-index) was used for the accuracy evaluation of the nomogram, and calibration curves were painted to test the actual observation and the nomogram-prediction of occurrence rate of DS. Results: Occurrence rate of DS in 130 APL patients was 30.0%; In multivariate analysis, body mass index (BMI) ≥24 kg/m2 and without using steroids for prevention of DS were identified as independent risk factors. The C-index of the nomogram for predicting DS was 0.818 (95% CI 0.741-0.895). The calibration curves showed good concordance of occurrence rate of DS between nomogram-prediction and actual observation. Conclusion: The nomogram was successfully established as a more accurate and visible tool for predicting the occurrence rate of DS in APL patients.
Collapse
Affiliation(s)
- X B Bao
- Jiangsu Institute of Hematology, the First Affiliated Hospital of Soochow University, Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Jiangsu Clinical Medicine Center, Suzhou 215006, China
| | | | | | | | | | | | | | | |
Collapse
|
7
|
Wang W, Tian CY, Li YH, Li Y. Molecular data and ecological niche modelling reveal the phylogeographic pattern of Cotinus coggygria (Anacardiaceae) in China's warm-temperate zone. Plant Biol (Stuttg) 2014; 16:1114-1120. [PMID: 24494998 DOI: 10.1111/plb.12157] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [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: 09/05/2013] [Accepted: 12/20/2013] [Indexed: 06/03/2023]
Abstract
The phylogeography of common and widespread species helps to elucidate the history of local flora and vegetation. In this study, we selected Cotinus coggygria, a species widely distributed in China's warm-temperate zone. One chloroplast DNA (cpDNA) region and ecological niche modelling were used to examine the phylogeographic pattern of C. coggygria. The cpDNA data revealed two phylogeographic groups (Southern and Northern) corresponding to the geographic regions. Divergence time analyses revealed that divergence of the two groups occurred at approximately 147,000 years before the present (BP), which coincided with the formation of the downstream area of the Yellow River, indicating that the Yellow River was a weak phylogeographic divide for C. coggygria. The molecular data and ecological niche modelling also indicated that C. coggyria did not experience population expansion after glaciations. This study thus supports the fact that Pleistocene glacial cycles only slightly affected C. coggygria, which survived in situ and occupied multiple localised glacial refugia during glaciations. This finding is contrary to the hypothesis of large-scale range habitat contraction and retreat into a few main refugia.
Collapse
Affiliation(s)
- W Wang
- College of Forestry, Henan Agricultural University, Zhengzhou, China
| | | | | | | |
Collapse
|
8
|
Li Z, Wu C, Dong H, Shum P, Tian CY, Zhao S. Stress distribution and induced birefringence analysis for pressure vector sensing based on single mode fibers. Opt Express 2008; 16:3955-3960. [PMID: 18542492 DOI: 10.1364/oe.16.003955] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We propose a theoretical approach to analyze the pressure stress distribution in single mode fibers (SMFs) and achieve the analytical expression of stress function, from which we obtain the stress components with their patterns in the core and compute their induced birefringence. Then we perform a pressure vector sensing based on approximately 2 km SMF. Using Mueller matrix method we measure the birefringence vectors which are employed to compute the pressure magnitudes and their orientation. When rotating the pressure around the fiber, the corresponding birefringence vector rotates around a circle with double speed. Statistics show the average deviation of calculated pressure-magnitude to practical value is approximately 0.17 N and it is approximately 0.85 degrees for orientation.
Collapse
Affiliation(s)
- Zhengyong Li
- Institute of Optical Information, Beijing Jiaotong University, Beijing 100044, China.
| | | | | | | | | | | |
Collapse
|
9
|
Feng G, Zhang FS, Li XL, Tian CY, Tang C, Rengel Z. Improved tolerance of maize plants to salt stress by arbuscular mycorrhiza is related to higher accumulation of soluble sugars in roots. Mycorrhiza 2002; 12:185-90. [PMID: 12189473 DOI: 10.1007/s00572-002-0170-0] [Citation(s) in RCA: 123] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2001] [Accepted: 02/21/2002] [Indexed: 05/19/2023]
Abstract
The effect of colonization with the arbuscular mycorrhizal (AM) fungus Glomus mosseae (Nicol. & Gerd.) Gerdemann & Trappe on the growth and physiology of NaCl-stressed maize plants ( Zea mays L. cv. Yedan 13) was examined in the greenhouse. Maize plants were grown in sand with 0 or 100 mM NaCl and at two phosphorus (P) (0.05 and 0.1 mM) levels for 34 days, following 34 days of non-saline pre-treatment. Mycorrhizal plants maintained higher root and shoot dry weights. Concentrations of chlorophyll, P and soluble sugars were higher than in non-mycorrhizal plants under given NaCl and P levels. Sodium concentration in roots or shoots was similar in mycorrhizal and non-mycorrhizal plants. Mycorrhizal plants had higher electrolyte concentrations in roots and lower electrolyte leakage from roots than non-mycorrhizal plants under given NaCl and P levels. Although plants in the low P plus AM fungus treatment and those with high P minus AM fungus had similar P concentrations, the mycorrhizal plants still had higher dry weights, soluble sugars and electrolyte concentrations in roots. Similar relationships were observed regardless of the presence or absence of salt stress. Higher soluble sugars and electrolyte concentrations in mycorrhizal plants suggested a higher osmoregulating capacity of these plants. Alleviation of salt stress of a host plant by AM colonization appears not to be a specific effect. Furthermore, higher requirement for carbohydrates by AM fungi induces higher soluble sugar accumulation in host root tissues, which is independent of improvement in plant P status and enhances resistance to salt-induced osmotic stress in the mycorrhizal plant.
Collapse
Affiliation(s)
- G Feng
- Department of Plant Nutrition, China Agricultural University, Beijing, PR China
| | | | | | | | | | | |
Collapse
|
10
|
Wan BJ, Zhang Y, Tian CY, Cai Y, Jiang HB. Blood lead dynamics of lead-exposed pregnant women and its effects on fetus development. Biomed Environ Sci 1996; 9:41-45. [PMID: 8721626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The dynamics of blood lead (Pb-B) and blood zinc protoporphyrin (ZPP-B) of women in early pregnancy and parturient women with lead exposure and the effects on fetus development were investigated. Pb-B of lead-exposed women was high: 0.984 mumol/L (20.38 micrograms/dl) and ZPP was 84.52 micrograms/dl. Cord blood Pb-B was 0.896 mumol/L (18.56 micrograms/dl) and cord blood ZPP was 69.24 micrograms/dl. In the control group, Pb-B was 0.261 mumol/L (5.41 micrograms/dl), ZPP-B, 37.59 micrograms/dl, cord blood, Pb-B 0.34 mumol/L (7.03 micrograms/dl), and cord ZPP-B 49.0 micrograms/dl. There was a significant correlation between blood lead and blood ZPP, maternal Pb-B and cord Pb-B, maternal Pb-B and cord ZPP-B. The significance of the consistency of high level Pb-B and the effects on fetus development is discussed.
Collapse
Affiliation(s)
- B J Wan
- Department of Public Health, China Medical University, Shenyang, China
| | | | | | | | | |
Collapse
|
11
|
Shen HP, Tian CY. [Comparison of acoustic images and pathologic findings in 51 patients with salivary masses]. Shanghai Kou Qiang Yi Xue 1994; 3:59. [PMID: 15160188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Affiliation(s)
- H P Shen
- Haiyan People's Hospital,Zhejing province. Hanyan 314300, China
| | | |
Collapse
|