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Wang Y, Wang Y, Tang HR, Zhang Y, Dai CY, Li J, Dai YM, Zheng MM. [Establishment method and significance of birthweight curve and reference in single center]. Zhonghua Fu Chan Ke Za Zhi 2023; 58:334-342. [PMID: 37217340 DOI: 10.3760/cma.j.cn112141-20230120-00021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Objective: To establish neonatal birthweight percentile curves based on single-center cohort database using different methods, compare them with the current national birthweight curves and discuss the appropriateness and significance of single-center birthweight standard. Methods: Based on a prospective first-trimester screening cohort at Nanjing Drum Tower Hospital from January 2017 to February 2022, the generalized additive models for location, scale and shape (GAMLSS) and semi-customized method were applied to generate local birthweight percentile curves (hereinafter referred to as the local GAMLSS curves, semi-customized curves) for 3 894 cases who were at low risk of small for gestation age (SGA) and large for gestation age (LGA). Infants were categorized as SGA (birth weight<10th centile) by both semi-customized and local GAMLSS curves, semi-customized curves only, or not SGA (met neither criteria). The incidence of adverse perinatal outcome between different groups was compared. The same method was used to compare the semi-customized curves with the Chinese national birthweight curves (established by GAMLSS method as well, hereinafter referred to as the national GAMLSS curves). Results: (1) Among the 7 044 live births, 404 (5.74%, 404/7 044), 774 (10.99%, 774/7 044) and 868 (12.32%, 868/7 044) cases were diagnosed as SGA according to the national GAMLSS curves, the local GAMLSS curves and the semi-customized curves respectively. The birth weight of the 10th percentile of the semi-customized curves was higher than that of the local GAMLSS curves and the national GAMLSS curves at all gestational age. (2) When comparing semi-customized curves and the local GAMLSS curves, the incidence of admission to neonatal intensive care unit (NICU) for more than 24 hours of infants identified as SGA by semi-customized curves only (94 cases) and both semi-customized and local GAMLSS curves (774 cases) was 10.64% (10/94) and 5.68% (44/774) respectively, both significantly higher than that in non SGA group [6 176 cases, 1.34% (83/6 176); P<0.001]. The incidence of preeclampsia, pregnancy<34 weeks, and pregnancy<37 weeks of infants identified as SGA by the semi-customized curves only and both semi-customized and local GAMLSS curves was 12.77% (12/94) and 9.43% (73/774), 9.57% (9/94) and 2.71% (21/774), 24.47% (23/94) and 7.24% (56/774) respectively, which were significantly higher than those of the non SGA group [4.37% (270/6 176), 0.83% (51/6 176), 4.23% (261/6 176); all P<0.001]. (3) When comparing semi-customized curves and the national GAMLSS curves, the incidence of admission to NICU for more than 24 hours of infants identified as SGA by semi-customized curves only (464 cases) and both semi-customized and national GAMLSS curves (404 cases) was 5.60% (26/464) and 6.93% (28/404) respectively, both significantly higher than that in non SGA group [6 176 cases, 1.34% (83/6 176); all P<0.001]. The incidence of emergency cesarean section or forceps delivery for non-reassuring fetal status (NRFS) in infants identified as SGA by semi-customized curves only and both semi-customized and national GAMLSS curves was 4.96% (23/464) and 12.38% (50/404), both significantly higher than that in the non SGA group [2.57% (159/6 176); all P<0.001]. The incidence of preeclampsia, pregnancy<34 weeks, and pregnancy<37 weeks in the semi-customized curves only group and both semi-customized and national GAMLSS curves group was 8.84% (41/464) and 10.89% (44/404), 4.31% (20/464) and 2.48% (10/404), 10.56% (49/464) and 7.43% (30/404) respectively, all significantly higher than those in the non SGA group [4.37% (270/6 176), 0.83% (51/6 176), 4.23% (261/6 176); all P<0.001]. Conclusion: Compared with the national GAMLSS birthweight curves and the local GAMLSS curves, the birth weight curves established by semi-customized method based on our single center database is in line with our center' SGA screening, which is helpful to identify and strengthen the management of high-risk infants.
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Affiliation(s)
- Y Wang
- Center for Obstetrics and Gynecology, Nanjing Drum Tower Hospital, Nanjing University Medical School, Nanjing 210008, China
| | - Y Wang
- Center for Obstetrics and Gynecology, Nanjing Drum Tower Hospital, Nanjing University Medical School, Nanjing 210008, China
| | - H R Tang
- Center for Obstetrics and Gynecology, Nanjing Drum Tower Hospital, Nanjing University Medical School, Nanjing 210008, China
| | - Y Zhang
- Center for Obstetrics and Gynecology, Nanjing Drum Tower Hospital, Nanjing University Medical School, Nanjing 210008, China
| | - C Y Dai
- Center for Obstetrics and Gynecology, Nanjing Drum Tower Hospital, Nanjing University Medical School, Nanjing 210008, China
| | - J Li
- Center for Obstetrics and Gynecology, Nanjing Drum Tower Hospital, Nanjing University Medical School, Nanjing 210008, China
| | - Y M Dai
- Center for Obstetrics and Gynecology, Nanjing Drum Tower Hospital, Nanjing University Medical School, Nanjing 210008, China
| | - M M Zheng
- Center for Obstetrics and Gynecology, Nanjing Drum Tower Hospital, Nanjing University Medical School, Nanjing 210008, China
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Feng T, Shou HF, Yuan SH, Tang HR, Lyu XJ, Yin ZM, Lou HM, Ni J. [Treatment and prognosis analysis of 488 patients with FIGO 2018 stage Ⅲc squamous cervical cancer]. Zhonghua Fu Chan Ke Za Zhi 2023; 58:359-367. [PMID: 37217343 DOI: 10.3760/cma.j.cn112141-20230128-00028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Objective: To analyze the treatment and prognosis of patients with International Federation of Gynecology and Obstetrics (FIGO) 2018 stage Ⅲc cervical squamous cell carcinoma. Methods: A total of 488 patients at Zhejiang Cancer Hospital between May, 2013 to May, 2015 were enrolled. The clinical characteristics and prognosis were compared according to the treatment mode (surgery combined with postoperative chemoradiotherapy vs radical concurrent chemoradiotherapy). The median follow-up time was (96±12) months ( range time from 84 to 108 months). Results: (1) The data were divided into surgery combined with chemoradiotherapy group (surgery group) and concurrent chemoradiotherapy group (radiotherapy group), including 324 cases in the surgery group and 164 cases in the radiotherapy group. There were significant differences in Eastern Cooperation Oncology Group (ECOG) score, FIGO 2018 stage, large tumors (≥4 cm), total treatment time and total treatment cost between the two groups (all P<0.01). (2) Prognosis: ① for stage Ⅲc1 patients, there were 299 patients in the surgery group with 250 patients survived (83.6%). In the radiotherapy group, 74 patients survived (52.9%). The difference of survival rates between the two groups was statistically significant (P<0.001). For stage Ⅲc2 patients, there were 25 patients in surgery group with 12 patients survived (48.0%). In the radiotherapy group, there were 24 cases, 8 cases survived, the survival rate was 33.3%. There was no significant difference between the two groups (P=0.296). ② For patients with large tumors (≥4 cm) in the surgery group, there were 138 patients in the Ⅲc1 group with 112 patients survived (81.2%); in the radiotherapy group, there were 108 cases with 56 cases survived (51.9%). The difference between the two groups was statistically significant (P<0.001). Large tumors accounted for 46.2% (138/299) vs 77.1% (108/140) in the surgery group and radiotherapy group. The difference between the two groups was statistically significant (P<0.001). Further stratified analysis, a total of 46 patients with large tumors of FIGO 2009 stage Ⅱb in the radiotherapy group were extracted, and the survival rate was 67.4%, there was no significant difference compared with the surgery group (81.2%; P=0.052). ③ Of 126 patients with common iliac lymph node, 83 patients survived, with a survival rate of 65.9% (83/126). In the surgery group, 48 patients survived and 17 died, with a survival rate of 73.8%. In the radiotherapy group, 35 patients survived and 26 died, with a survival rate of 57.4%. There were no significant difference between the two groups (P=0.051). (3) Side effects: the incidence of lymphocysts and intestinal obstruction in the surgery group were higher than those in the radiotherapy group, and the incidence of ureteral obstruction and acute and chronic radiation enteritis were lower than those in the radiotherapy group, and there were statistically significant differences (all P<0.01). Conclusions: For stage Ⅲc1 patients who meet the conditions for surgery, surgery combined with postoperative adjuvant chemoradiotherapy and radical chemoradiotherapy are acceptable treatment methods regardless of pelvic lymph node metastasis (excluding common iliac lymph node metastasis), even if the maximum diameter of the tumor is ≥4 cm. For patients with common iliac lymph node metastasis and stage Ⅲc2, there is no significant difference in the survival rate between the two treatment methods. Based on the duration of treatment and economic considerations, concurrent chemoradiotherapy is recommended for the patients.
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Affiliation(s)
- T Feng
- Department of Gynecologic Tumor Radiotherapy, Zhejiang Cancer Hospital, Hangzhou Institute of Medicine, Chinese Academy of Sciences, Hangzhou 310022, China
| | - H F Shou
- Department of Gynecology, Zhejiang People Hospital, Hangzhou 310014, China
| | - S H Yuan
- Department of Gynecologic Tumor Radiotherapy, Zhejiang Cancer Hospital, Hangzhou Institute of Medicine, Chinese Academy of Sciences, Hangzhou 310022, China
| | - H R Tang
- Department of Gynecologic Tumor Radiotherapy, Zhejiang Cancer Hospital, Hangzhou Institute of Medicine, Chinese Academy of Sciences, Hangzhou 310022, China
| | - X J Lyu
- Department of Gynecologic Tumor Radiotherapy, Zhejiang Cancer Hospital, Hangzhou Institute of Medicine, Chinese Academy of Sciences, Hangzhou 310022, China
| | - Z M Yin
- Department of Gynecologic Tumor Radiotherapy, Zhejiang Cancer Hospital, Hangzhou Institute of Medicine, Chinese Academy of Sciences, Hangzhou 310022, China
| | - H M Lou
- Department of Gynecologic Tumor Radiotherapy, Zhejiang Cancer Hospital, Hangzhou Institute of Medicine, Chinese Academy of Sciences, Hangzhou 310022, China
| | - J Ni
- Department of Gynecologic Tumor Radiotherapy, Zhejiang Cancer Hospital, Hangzhou Institute of Medicine, Chinese Academy of Sciences, Hangzhou 310022, China
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Zhou F, Chen F, Pan T, Zhu T, Zhang YL, Zhang P, Tang HR. [Outcomes and prognosis of radical surgery in patients with stageⅠb2 and Ⅱa2 cervical squamous cell carcinoma]. Zhonghua Fu Chan Ke Za Zhi 2022; 57:361-369. [PMID: 35658327 DOI: 10.3760/cma.j.cn112141-20220326-00194] [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 survival, complications and prognostic factors in patients with stageⅠb2 and Ⅱa2 cervical squamous cell carcinoma treated by primarily radical surgery with or without postoperative adjuvant therapy. Methods: The clinical and pathological data of patients with stageⅠb2 and Ⅱa2 cervical squamous cell carcinoma treated in the Cancer Hospital of the University of Chinese Academy of Sciences from January 2015 to January 2018 were retrospectively analyzed. All patients underwent Querleu-Morrow classification (Q-M classification) C2 radical surgery, including extensive hysterectomy+pelvic lymphadenectomy with or without adjuvant therapy based on postoperative risk factors. Survival rate was calculated by Kaplan-Meier method and survival curve was drawn. Univariate analysis was performed by using the log-rank test to analyze the clinicopathological factors related to the prognosis of patients. Multivariate analysis was performed by using Cox regression method to analyze independent risk factors affecting survival prognosis. Results: (1) The median age of 643 patients with cervical squamous cell carcinoma was 50 years old (45-58 years old). Clinical stage: 260 cases (40.4%, 260/643) of stage Ⅰb2, 383 cases (59.6%, 383/643) of stage Ⅱa2. (2) Among 643 cases underwent Q-M classification C2 surgery, 574 cases (89.3%, 574/643) of them received adjuvant therapy and 184 cases (28.6%, 184/643) of them had grade 3-4 complications after treatment, including 134 cases (20.8%, 134/643) early complications and 66 cases (10.3%, 66/643) late complications. The incidence of grade 3-4 complications in 574 patients received postoperative adjuvant therapy was 30.1% (173/574), which was significantly different from that in 69 patients who received surgery alone (15.9%, 11/69; χ²=6.08, P=0.014). (3) All 643 cases were followed up, and the median follow-up time was 40 months (3-76 months). During the follow-up period, 117 cases (18.2%, 117/643) recurred, including 45 cases (7.0%, 45/643) of local recurrence, 54 cases (8.4%, 54/643) of distant metastasis, and 18 cases (2.8%, 18/643) of local recurrence and distant metastasis. The 5-year progression-free survival (PFS) and 5-year overall survival (OS) rates of patients with stage Ⅰb2 and Ⅱa2 cervical squamous cell carcinoma were 79.9% and 85.5%, respectively. Univariate analysis showed that pelvic lymph node metastasis, para-aortic lymph node metastasis, deep stromal infiltration, and lymph-vascular space invasion were significantly associated with 5-year PFS in patients with stage Ⅰb2 and Ⅱa2 cervical squamous cell carcinoma (all P<0.05). The maximum diameter of tumor, pelvic lymph node metastasis and para-aortic lymph node metastasis were significantly associated with the 5-year OS of cervical squamous cell carcinoma in stages Ⅰb2 and Ⅱa2 (all P<0.05). Multivariate analysis showed that pelvic lymph node metastasis and para-aortic lymph node metastasis were independent factors affecting 5-year PFS and 5-year OS in patients with stage Ⅰb2 and Ⅱa2 cervical squamous cell carcinoma (all P<0.01). Conclusion: Radical surgery is a feasible and effective primary treatment for stagesⅠb2 and Ⅱa2 cervical squamous cell carcinoma, with a high 5-year survival rate and an acceptable complication rate.
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Affiliation(s)
- F Zhou
- Department of Gynecological Oncology, the Cancer Hospital of the University of Chinese Academy of Sciences, Hangzhou 310022, China
| | - F Chen
- School of the Second Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - T Pan
- School of the Second Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - T Zhu
- Department of Gynecological Oncology, the Cancer Hospital of the University of Chinese Academy of Sciences, Hangzhou 310022, China
| | - Y L Zhang
- Department of Gynecological Oncology, the Cancer Hospital of the University of Chinese Academy of Sciences, Hangzhou 310022, China
| | - P Zhang
- Department of Gynecological Oncology, the Cancer Hospital of the University of Chinese Academy of Sciences, Hangzhou 310022, China
| | - H R Tang
- Department of Gynecological Radiotherapy, the Cancer Hospital of the University of Chinese Academy of Sciences, Hangzhou 310022, China
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Wang Y, Tang HR, Wang Y, Zheng MM, Ye XD, Dai YM, Hu YL. [Association between gestational blood pressure and pregnancy induced hypertension or pre-eclampsia]. Zhonghua Fu Chan Ke Za Zhi 2021; 56:767-773. [PMID: 34823289 DOI: 10.3760/cma.j.cn112141-20210601-00297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To construct the gestational-age-specific blood pressure curve and percentile blood pressure values of pregnant women in Jiangsu Province, and to explore the clinic significance of the blood pressure changes in women whose blood pressure was less than 140/90 mmHg (1 mmHg=0.133 kPa) in each trimester and eventually developed pregnancy induced hypertension (PIH) or pre-eclampsia (PE). Methods: A prospective longitudinal cohort during pregnancy was built. Singleton pregnant women in the first trimester (11-13+6 weeks) were recruited from July 2017 to September 2020 in Nanjing Drum Tower Hospital, and were followed up in the second trimester (19-23+6 weeks), the third trimester (30-33+6 weeks) and approaching the expected date of delivery (35-38+6 weeks). The Viewpoint 6.0 software was used to record pregnancy-related information. The blood pressure was measured by standard methods in our clinic. Least mean square (LMS) function was performed to fit the gestational-age-specific blood pressure curve and percentile blood pressure values were calculated at every follow-up time point. Logistic regression was applied to calculate the OR for the groups with blood pressure ≥95th percentile (P95). Results: There were 3 728 singleton pregnant women invited in this study, including 3 490 normal pregnant women (93.62%, 3 490/3 728), and 238 pregnant women with PIH or PE (6.38%, 238/3 728). Gestational-age-specific blood pressure curve showed that systolic blood pressure (SBP), diastolic blood pressure (DBP) and mean arterial pressure (MAP) decreased in the second trimester, compared with those in the first and the third trimester, however the fluctuation of blood pressure was low, but regardless of the gestational age, P95 of SBP, DBP and MAP increased by 14, 11 and 11 mmHg respectively, compared with 50th percentile (P50). In the first trimester, the risk of developing PIH or PE finally in pregnant women with blood pressure ≥P95 was 4.36-fold (95%CI: 2.99-6.35) for SBP than women with SBP<P95, 5.22-fold (95%CI: 3.65-7.46) for DBP and 5.14-fold (95%CI: 3.61-7.32) for MAP. When approaching the expected date of delivery, the corresponding risks of the women with blood pressure ≥P95 were 16.76 times, 27.45 and 27.31 times respectively than those of the women with blood pressure <P95. In the first trimester, every 1 mmHg elevation of SBP the risk developing PIH or PE increased by 24% (OR=1.24, 95%CI: 1.15-1.33), 44% (OR=1.44, 95%CI: 1.31-1.59) for DBP and 47% (OR=1.47, 95%CI: 1.33-1.61) for MAP, respectively. The risk in the second trimester was similar to that in the first trimester, and in the third trimester, the risk was further increased. When approaching the expected date of delivery, DBP or MAP increased by 1 mmHg, the risk developing PIH or PE was double; while SBP increased by 1 mmHg, the risk increased by 58%. The areas under the receiver operator characteristic curves of SBP, DBP and MAP were similar for predicting PIH or PE, and the predictive efficiency were all poor. Conclusions: Construction of percentile blood pressure values for pregnant women is helpful in identification of high-risk women of developing PIH or PE. The risk of PIH or PE in pregnant women with blood pressure ≥P95 but <140/90 mmHg has significantly increased compared with women with blood pressure <P95.
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Affiliation(s)
- Y Wang
- Department of Obstetrics and Gynecology, Nanjing Drum Tower Hospital, Medical School of Nanjing University, Nanjing 210008, China
| | - H R Tang
- Department of Obstetrics and Gynecology, Nanjing Drum Tower Hospital, Medical School of Nanjing University, Nanjing 210008, China
| | - Y Wang
- Department of Obstetrics and Gynecology, Nanjing Drum Tower Hospital, Medical School of Nanjing University, Nanjing 210008, China
| | - M M Zheng
- Department of Obstetrics and Gynecology, Nanjing Drum Tower Hospital, Medical School of Nanjing University, Nanjing 210008, China
| | - X D Ye
- Department of Obstetrics and Gynecology, Nanjing Drum Tower Hospital, Medical School of Nanjing University, Nanjing 210008, China
| | - Y M Dai
- Department of Obstetrics and Gynecology, Nanjing Drum Tower Hospital, Medical School of Nanjing University, Nanjing 210008, China
| | - Y L Hu
- Department of Obstetrics and Gynecology, Nanjing Drum Tower Hospital, Medical School of Nanjing University, Nanjing 210008, China
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Yu L, Huang L, Tang HR, Li N, Rao TT, Hu D, Wen YF, Shi LX. Analysis of factors influencing the network teaching effect of college students in a medical school during the COVID-19 epidemic. BMC Med Educ 2021; 21:397. [PMID: 34301244 PMCID: PMC8300986 DOI: 10.1186/s12909-021-02825-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Accepted: 07/13/2021] [Indexed: 05/06/2023]
Abstract
BACKGROUND The purpose of this study is to understand the influencing factors of Chinese college students' satisfaction with online teaching and psychological pressure on learning during the novel coronavirus epidemic. METHODS We assessed the effect of online teaching of 7084 medical students from wannan medical college in March 5 to April 2, 2020 using cluster sampling. The respondents were asked to complete a 7-item self-compiled online teaching satisfaction questionnaire. Chi-square test and multivariate logistic regression analysis are used. RESULTS Sex is female (OR = 1.257, 95%CI: 1.132 ~ 1.396), grades are second and third grades (second grades: OR = 1.228, 95%CI: 1.080 ~ 1.397; third grades: OR = 1.197, 95%CI: 1.048 ~ 1.367), normal/unfamiliar learning platform operation (OR = 3.692, 95%CI: 3.321 ~ 4.103) were risk factors for satisfactory teaching effect. In addition, students whose school year system is four-year (OR = 0.870, 95%CI: 0.781 ~ 0.969) and grade 4 and above (OR = 0.594, 95%CI: 0.485 ~ 0.727) were more satisfied with the teaching effect of teachers. And, during the period of the COVID-19 epidemic, the risk factors for college students to have psychological stress were: female (OR = 1.258, 95%CI: 1.096 ~ 1.442), from rural areas (OR = 1.511, 95%CI: 1.312 ~ 1.740), and the academic year system is four-year system (OR = 1.191, 95%CI: 1.028 ~ 1.380), using mobile phones and other learning tools (OR = 1.388, 95%CI: 1.205 ~ 1.600), general/unfamiliar with learning platform operations (OR = 2.273), 95%CI: 1.888 ~ 2.735). While the protective factors for college students' psychological stress included: grade three and four and above (OR = 0.463, 95%CI: 0.387 ~ 0.554; OR = 0.232, 95%CI: 0.187 ~ 0.286), and they think that the teaching effect is satisfactory (OR = 0.314, 95%CI: 0.261 ~ 0.379). CONCLUSION This survey shows that compared with male college students, female college students were more dissatisfied with the teaching effect of teachers and havd greater psychological pressure on learning. Psychological counseling should be strengthened for students in rural areas and those who were not familiar with the operating platform to relieve their psychological pressure on learning.
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Affiliation(s)
- Liang Yu
- School of Humanities and Management, Wannan Medical College, Wuhu, 241002, Anhui, China
| | - Long Huang
- School of Humanities and Management, Wannan Medical College, Wuhu, 241002, Anhui, China
| | - Hao-Ru Tang
- Teaching Quality Assessment Centre, Wannan Medical College, Wuhu, 241002, Anhui, China
| | - Na Li
- School of Anesthesiology, Wannan Medical College, Wuhu, 241002, Anhui, China
| | - Ting-Ting Rao
- Youth League Committee, Wannan Medical College, Wuhu, 241002, Anhui, China
| | - Die Hu
- Teaching Quality Assessment Centre, Wannan Medical College, Wuhu, 241002, Anhui, China
| | - Yu-Feng Wen
- Teaching Quality Assessment Centre, Wannan Medical College, Wuhu, 241002, Anhui, China
- Department of Nutrition and Food Hygiene, School of Public Health, Wannan Medical College, Wuhu, 241002, Anhui, China
| | - Liu-Xia Shi
- Department of Oral Medicine, School of Stomatology, Wannan Medical College, Wuhu, 241002, Anhui, China.
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Abstract
Blackberry (Rubus spp.) is an important hybrid fruit crop popular in the US Pacific Northwest and the European region with complex origins. In this study, we report the complete chloroplast genome sequence of a hybrid blackberry cultivar 'Arapohol' using next-generation sequencing technology. The complete chloroplast genome size is 156,621 bp. The genome contains 134 genes, including 40 tRNA genes, 86 protein-coding genes, and 8 rRNA genes. Phylogenetic analysis based on 11 complete chloroplast genomes revealed that taxa is closely related to Rubus niveus. The complete chloroplast genome of this Rubus sp. provides valuable information for understanding the origination of this crop species.
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Affiliation(s)
- Xun-Ju Liu
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Xiao-Rong Wang
- College of Horticulture, Sichuan Agricultural University, Chengdu, China.,Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, China
| | - Hao-Ru Tang
- College of Horticulture, Sichuan Agricultural University, Chengdu, China.,Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, China
| | - Qing Chen
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
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Xiao ZR, Lu Q, Zhou R, Wang YQ, Liang WY, Liu HX, Tang HR, Wu GZ, Liu XS, Zhang H, Ren Y, Wang JL. [Analysis of pregnancy outcome after fertility-preserving treatment among women with atypical endometrial hyperplasia or endometrial carcinoma]. Zhonghua Fu Chan Ke Za Zhi 2021; 55:857-864. [PMID: 33355761 DOI: 10.3760/cma.j.cn112141-20200613-00501] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To analyze the pregnancy outcome, influencing factors and recurrence of fertility-preserving therapy for women with atypical endometrial hyperplasia (AEH) or endometrial carcinoma (EC). Methods: The multi-center retrospective study included 107 women with AEH or EC for fertility-preserving therapy in 10 hospitals from January 1st, 2009 to December 31st, 2018. The clinical pregnancy rate, live birth rate and recurrence of 66 patients with urgent child-bearing requirements after fertility-preserving treatment were analyzed. Results: (1) Among the 66 AEH and EC women with urgent child bearing requirements, 24 women chose spontaneous pregnancy, the clinical pregnancy rate was 54.2% (13/24) and the live birth rate was 41.7% (10/24), the median time from fertility-preserving therapy withdrawal to clinical pregnancy was 5.5 months. Forty-two women chose assisted reproductive technology (ART), the clinical pregnancy rate was 59.5% (25/42) and the live birth rate was 35.7% (15/42), the median time from fertility-preserving therapy withdrawal to clinical pregnancy was 19.5 months. The time from fertility-preserving therapy withdrawal to pregnancy in women receiving ART was significantly longer than that in women with spontaneous pregnancy (P=0.048). (2) Age and intrauterine adhesions were independent factors affecting the clinical pregnancy rate (P<0.05). (3) Among 107 patients with AEH or EC, the recurrence rate was 27.1% (29/107). Among the 42 cases who chose ART, 9 of them recurred before ART treatment, who received the fertility-preserving therapy again and then ART treatment, 8 women got clinical pregnancy,5 of them delivered at least a live birth. Conclusions: Women with AEH or EC could achieved satisfactory clinical pregnancy rate and live birth rate after fertility-preserving therapy. Age and intrauterine adhesions are independent factors affecting clinical pregnancy rate. The women with recurrent AEH or EC could be treated with fertility-preserving therapy again and get a satisfactory pregnancy outcome.
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Affiliation(s)
- Z R Xiao
- Department of Obstetrics and Gynecology, Peking University People's Hospital, Beijing 100044, China
| | - Q Lu
- Department of Obstetrics and Gynecology, Peking University People's Hospital, Beijing 100044, China
| | - R Zhou
- Department of Obstetrics and Gynecology, Peking University People's Hospital, Beijing 100044, China
| | - Y Q Wang
- Department of Obstetrics and Gynecology, Peking University People's Hospital, Beijing 100044, China
| | - W Y Liang
- Department of Obstetrics and Gynecology, Peking University People's Hospital, Beijing 100044, China
| | - H X Liu
- Department of Obstetrics and Gynecology, Peking University People's Hospital, Beijing 100044, China
| | - H R Tang
- Department of Obstetrics and Gynecology, Peking University Shenzhen Hospital, Shenzhen 518036, China
| | - G Z Wu
- Department of Gynecology, Shanghai First Maternity and Infant Hospital, Tongji University, Shanghai 200040, China
| | - X S Liu
- Department of Gynecology, Third Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - H Zhang
- Department of Gynecological Oncology, Tianjin Central Hospital of Gynecology Obstetrics, Tianjin 300199, China
| | - Y Ren
- Department of Obstetrics and Gynecology, Xingtai People's Hospital of Hebei Province, Xingtai 054031, China
| | - J L Wang
- Department of Obstetrics and Gynecology, Peking University People's Hospital, Beijing 100044, China
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Jin Y, Chen YM, Hu X, Tang HR, Yu XM, Fan Y, Xu YJ, Xu HM, Li PS, Li Q, Chang LP, Guan YF, Chen M. [Analysis of the feasibility and prognostic value of circulating tumor DNA in detecting gene mutations in small cell lung cancer]. Zhonghua Yi Xue Za Zhi 2020; 100:3614-3621. [PMID: 33333686 DOI: 10.3760/cma.j.cn112137-20200504-01412] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the feasibility of circulating tumor DNA (ctDNA) in detecting small cell lung cancer (SCLC) gene mutations and its prognostic value in chemotherapy and/or radiotherapy for SCLC patients. Methods: A total of 77 SCLC patients who were admitted to the Department of Thoracic Medical Oncology and the Department of Thoracic Radiation Oncology of Zhejiang Cancer Hospital from July 2016 to November 2019 were included. There were 66 males and 11 females, with a median age of 60 years. Among them, 42 cases were in limited stage (LS) and 35 cases were in extensive stage (ES). Next-generation sequencing (NGS) of patients' plasma ctDNA was performed before treatment. The differences of mutated genes and signaling pathways between LS and ES patients were analyzed and compared. Blood-based tumor mutation burden (bTMB) was calculated according to detected somatic cell mutations. Patients were divided into the high bTMB and the low bTMB groups according to the optimal threshold calculated by R software. Log-rank tests were used to compare progression-free survival (PFS) between the high bTMB and the low bTMB groups. Results: Among the 77 patients, 76 patients had gene mutations detected in their plasma, and the positive rate of ctDNA test was 98%. Among the 76 patients, the genes with the highest mutation frequency were TP53 (89%), RB1 (70%), LRP1B (34%), CREBBP (21%), MLL3 (21%), MLL2 (16%), NOTCH1 (13%), ROS1 (13%), BRCA2 (12%), and PTPRD (12%). The most common mutated genes in LS patients were TP53 (90%), RB1 (68%), LRP1B (24%), MLL2 (22%), and BRCA2 (17%); the most common mutated genes in ES patients were TP53 (89%), RB1 (71%), LRP1B (46%), CREBBP (31%), and MLL3 (29%). The mutation rates of NOTCH1 and CREBBP genes were significantly higher in ES patients (31.4% and 22.9%) than those in LS patients (11.9% and 4.8%) (both P<0.05). Signaling pathway analysis showed that there were more NOTCH pathway gene variations in ES patients. Among LS patients, patients in the high bTMB group (≥ 6.96 mutations/Mb) had a longer PFS than that in the low bTMB group (<6.96 mutations/Mb) (P=0.033); but no such difference was noted in ES patients. Conclusion: Plasma ctDNA sequencing detected SCLC gene mutation profiles similar to those reported in previous literature, thus ctDNA could be used as a tool to study SCLC genomics; the mutation spectra of ES-SCLC and LS-SCLC were different. bTMB has potential prognostic value in LS-SCLCs treated with chemoradiotherapy.
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Affiliation(s)
- Y Jin
- Department of Thoracic Medical Oncology, Cancer Hospital of University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou 310000, China
| | - Y M Chen
- Zhejiang Key Laboratory of Radiation Oncology, Cancer Hospital of University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou 310000, China
| | - X Hu
- Department of Thoracic Radiation Oncology, Cancer Hospital of University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou 310000, China
| | - H R Tang
- Department of Gynecologic Oncology, Cancer Hospital of University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou 310000, China
| | - X M Yu
- Department of Thoracic Medical Oncology, Cancer Hospital of University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou 310000, China
| | - Y Fan
- Department of Thoracic Medical Oncology, Cancer Hospital of University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou 310000, China
| | - Y J Xu
- Department of Thoracic Radiation Oncology, Cancer Hospital of University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou 310000, China
| | - H M Xu
- Department of pathology, Cancer Hospital of University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou 310000, China
| | - P S Li
- Geneplus-Beijing Institue, Beijing 102206, China
| | - Q Li
- Geneplus-Beijing Institue, Beijing 102206, China
| | - L P Chang
- Geneplus-Beijing Institue, Beijing 102206, China
| | - Y F Guan
- Geneplus-Beijing Institue, Beijing 102206, China
| | - M Chen
- Department of Thoracic Radiation Oncology, Cancer Hospital of University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou 310000, China
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9
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Sun B, Jiang M, Zheng H, Jian Y, Huang WL, Yuan Q, Zheng AH, Chen Q, Zhang YT, Lin YX, Wang Y, Wang XR, Wang QM, Zhang F, Tang HR. Color-related chlorophyll and carotenoid concentrations of Chinese kale can be altered through CRISPR/Cas9 targeted editing of the carotenoid isomerase gene BoaCRTISO. Hortic Res 2020; 7:161. [PMID: 33082968 PMCID: PMC7527958 DOI: 10.1038/s41438-020-00379-w] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Revised: 06/07/2020] [Accepted: 07/10/2020] [Indexed: 05/03/2023]
Abstract
The carotenoid isomerase gene (BoaCRTISO) of Chinese kale was targeted and edited using the CRISPR/Cas9 system in the present study. The results showed a high mutation rate (81.25%), and 13 crtiso mutants were obtained. Only two types of mutations, insertions and replacements, were found. Both the total and individual carotenoid and chlorophyll concentrations of the biallelic and homozygous mutants were reduced, and the total levels declined by 11.89-36.33%. The color of the biallelic and homozygous mutants changed from green to yellow, likely reflecting a reduction in the color-masking effect of chlorophyll on carotenoids. The expression levels of most carotenoid and chlorophyll biosynthesis-related genes, including CRTISO, were notably lower in the mutants than in the WT plants. In addition, the functional differences between members of this gene family were discussed. In summary, these findings indicate that CRISPR/Cas9 is a promising technique for the quality improvement of Chinese kale and other Brassica vegetables.
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Affiliation(s)
- Bo Sun
- College of Horticulture, Sichuan Agricultural University, 611130 Chengdu, China
| | - Min Jiang
- College of Horticulture, Sichuan Agricultural University, 611130 Chengdu, China
| | - Hao Zheng
- College of Horticulture, Sichuan Agricultural University, 611130 Chengdu, China
| | - Yue Jian
- College of Horticulture, Sichuan Agricultural University, 611130 Chengdu, China
| | - Wen-Li Huang
- College of Horticulture, Sichuan Agricultural University, 611130 Chengdu, China
| | - Qiao Yuan
- College of Horticulture, Sichuan Agricultural University, 611130 Chengdu, China
| | - Ai-Hong Zheng
- College of Horticulture, Sichuan Agricultural University, 611130 Chengdu, China
| | - Qing Chen
- College of Horticulture, Sichuan Agricultural University, 611130 Chengdu, China
| | - Yun-Ting Zhang
- Institute of Pomology and Olericulture, Sichuan Agricultural University, 611130 Chengdu, China
| | - Yuan-Xiu Lin
- Institute of Pomology and Olericulture, Sichuan Agricultural University, 611130 Chengdu, China
| | - Yan Wang
- Institute of Pomology and Olericulture, Sichuan Agricultural University, 611130 Chengdu, China
| | - Xiao-Rong Wang
- Institute of Pomology and Olericulture, Sichuan Agricultural University, 611130 Chengdu, China
| | - Qiao-Mei Wang
- Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Ministry of Agriculture, Department of Horticulture, Zhejiang University, 310058 Hangzhou, China
| | - Fen Zhang
- College of Horticulture, Sichuan Agricultural University, 611130 Chengdu, China
| | - Hao-Ru Tang
- College of Horticulture, Sichuan Agricultural University, 611130 Chengdu, China
- Institute of Pomology and Olericulture, Sichuan Agricultural University, 611130 Chengdu, China
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10
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Tang HR, Zhang Y, Ru T, Li J, Yang L, Xu Y, Duan HL, Wang Y, Wang Y, Hu YL, Zhang Y, Zheng MM. [Prospective cohort study of fetal nuchal translucency in first-trimester and pregnancy outcome]. Zhonghua Fu Chan Ke Za Zhi 2020; 55:94-99. [PMID: 32146737 DOI: 10.3760/cma.j.issn.0529-567x.2020.02.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore the relationship between fetal nuchal translucency (NT) in the first trimester and pregnancy outcome. Methods: A prospective cohort study was conducted in Nanjjing Drum Tower Hospital from December 2015 to December 2018, 4 958 singleton pregnant women were enrolled to screen fetal ultrasound structure and serology in the first trimester, ultrasound in the second trimester and neonatus physical examination 28 days after birth. According to the results of NT, 167 cases of fetus with increased NT (≥3.0 mm) and 4 791 cases of normal NT were divided, moreover, 86 cases with isolate increased NT and 81 cases of increased NT combined with structural abnormality. The prognosis of fetuses with different NT thickness was analyzed, and the pregnancy outcome of fetuses with isolate increased NT or combined with structural abnormality were analyzed. In the first trimester, if the fetal structure was abnormal or the serological screening result was high risk, the chromosomal microarray analysis (CMA) would be performed by chorionic villus sampling to determine the prenatal diagnosis. Results: (1) The pregnancy outcome for fetus of normal NT: there were 4 791 cases with normal NT. Totally, 4 726 cases with normal NT and no structural abnormalities were screened out in the firsttrimester. In this group, 5 cases of aneuploidies were diagnosed based on high risk of maternal serum biomarkers and 83 cases of structural abnormalities were screened out in the subsequent ultrasound scan and the neonatal examination. Another 65 cases with normal NT present complicated with structural anomalies were screened out in the first trimester and 4 cases were diagnosed as aneuploidies. (2) The pregnancy outcome for fetus of isolate increased NT: 66 (76.7%, 66/86) cases of isolated increased NT were performed CMA, 3 cases were diagnosed as trisomy 21 and terminated pregnancy. Another 4 cases were terminated pregnancy privately without cytogenetic diagnosis. No further anomalies were found in 79 cases till 6 to 21 months postnatally. (3) The pregnancy outcome for fetus of increased NT with structural anomalies: increased NT present with structural anomalies were screened out by detailed anomaly scan in the first trimester and 32 of them were confirmed as aneuploidies. In this group, 70 cases terminated pregnancy, 2 cases had spontaneous miscarriages and 9 cases had liveborns (1 newborn was found ventricular septal defect). (4) The pregnancy outcome for fetus of increased NT with or without structural anomalies: the percentage of aneuploidies in fetuses with isolated increased NT (3.5%, 3/86) was significantly lower than those with structural abnormalities (39.5%,32/81). The healthy survival rate in fetuses with isolated increased NT (91.9%,79/86) was significantly higher than those with structural abnormalities (9.9%, 8/81). Conclusions: A detailed first-trimester anomaly scan could improve prenatal screening efficiency of birth defects. Compared to the fetuses with increased NT combined with structural abnormalities, the healthy survival rate of fetuses with isolated increased NT based on detailed first-trimester anomaly scan is higher and the percentage of fetal aneuploidies is lower.
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Affiliation(s)
- H R Tang
- Department of Obstetrics and Gynecology, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical College of Nanjing University, Nanjing 210008, China
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11
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He YJ, Wang YQ, Tang HR, He M, Rao Y, Zhou R, Wang JL. [Clinical efficacy and pregnancy outcomes of fertility-preserving re-treatment after recurrence of the patient with atypical endometrial hyperplasia and early stage endometrial carcinoma]. Zhonghua Fu Chan Ke Za Zhi 2020; 55:21-28. [PMID: 32074769 DOI: 10.3760/cma.j.issn.0529-567x.2020.01.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To analyze the clinical efficacy and pregnancy outcomes of fertility- preserving re-treatment in patients with recurrent atypical endometrial hyperplasia (AEH) and early stage endometrial carcinoma (EEC) after achieved complete remission (CR) of primary fertility-preserving therapy. Methods: There were 104 cases of AEH and EEC collected from 9 hospitals in the multi-center research network platform of fertility-preserving therapy of endometrial carcinoma in China from January 2005 to May 2019. Thirth-one cases of them relapsed from four hospitals mentioned above,who achieved CR after primary fertility-preserving therapy,was analyzed retrospectively. Of the 31 cases, 27 cases chose fertility-preserving re-treatment. The demographic characteristics, re-treatment effect, clinical factors and pregnancy outcomes were observed. Results: (1) There were 16 AEH cases and 11 ECC cases among 27 recurrent patients who chose fertility-preserving therapy again. After re-treatment, CR was found in 13 out of 16 cases of AEH and 9 out of 11 cases of EEC. The overall CR rate was 81% (22/27). (2) After CR of recurrence, 5 cases (23%, 5/22) of re-recurrence were found after with a median time of 33 months (range 21-80 months). There were 4 cases underwent comprehensive surgical staging, and 1 patient chose the third round of fertility preservation therapy with fully informed consent, and CR was reached after 15 months. (3) There were 16 cases with pregnancy intention, with a total of 12 pregnancies, including 5 cases were natural pregnancy and 7 cases were assisted reproductive technology pregnancy. There were 5 live births. The follow-up time was up to May 2019, and the median follow-up time was 73 months (range 0-123 months). All 27 patients had disease free survival. Conclusions: Recurrent patients with AEH and EEC after achieving successful fertility-preserving therapy could choose fertility-preserving therapy again with comprehensive assessment and fully informed consent. After re-treatment, there is a certain tumor CR rate and pregnancy rate, while the close follow-up is required during treatment.
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Affiliation(s)
- Y J He
- Department of Obstetrics and Gynecology, Peking University People's Hospital, Beijing 100044, China
| | - Y Q Wang
- Department of Obstetrics and Gynecology, Peking University People's Hospital, Beijing 100044, China
| | - H R Tang
- Department of Obstetrics and Gynecology, Peking University Shenzhen Hospital, Shenzhen 518036, China
| | - M He
- Department of Obstetrics and Gynecology, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China
| | - Y Rao
- Department of Gynecological Oncology, Tianjin Central Hospital of Gynecology Obstetrics, Tianjin 300100, China
| | - R Zhou
- Department of Obstetrics and Gynecology, Peking University People's Hospital, Beijing 100044, China
| | - J L Wang
- Department of Obstetrics and Gynecology, Peking University People's Hospital, Beijing 100044, China
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12
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Sun B, Yuan Q, Zheng H, Liang S, Jiang M, Wang MM, Chen Q, Li MY, Zhang Y, Luo Y, Gong RG, Zhang F, Tang HR. An Efficient and Economical Protocol for Isolating, Purifying and PEG-Mediated Transient Gene Expression of Chinese Kale Hypocotyl Protoplasts. Plants (Basel) 2019; 8:plants8100385. [PMID: 31569422 PMCID: PMC6843555 DOI: 10.3390/plants8100385] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 09/25/2019] [Accepted: 09/26/2019] [Indexed: 01/17/2023]
Abstract
In this study, we report the isolation and purification of protoplasts from Chinese kale (Brassica oleracea var. alboglabra) hypocotyls, and their transient gene expression transformation and subcellular localization of BaMYB75 (Bol042409). The upshot is that the vintage protocol included 5-d hypocotyls that were enzymatically hydrolyzed for 8 h in enzyme solution (3.0% cellulase, 0.5% pectolase, and 0.5 M mannitol), and the protoplasts were purified by precipitation. The total yield of protoplasts was 8 × 105 protoplast g-1 fresh weight, and the protoplasts' viability was 90%. The maximum transformation efficiency obtained by using green fluorescent protein (GFP) as a detection gene was approximately 45% when the polyethylene glycol (PEG)4000 concentration was 40% and transformation time was 20 min. In addition, BaMYB75 was ultimately localized in the nucleus of Chinese kale hypocotyl protoplasts, verifying the validity and reliability of this transient transformation system. An effective and economical hypocotyl protoplast isolation, purification, and transformation system was established for Chinese kale in this study. This effectively avoided interference of chloroplast autofluorescence compared to using mesophyll cells, laying the foundation for future research in the molecular biology of Brassica vegetables.
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Affiliation(s)
- Bo Sun
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
| | - Qiao Yuan
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
| | - Hao Zheng
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
| | - Sha Liang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
| | - Min Jiang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
| | - Mei-Mei Wang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
| | - Qing Chen
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
| | - Meng-Yao Li
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
| | - Yong Zhang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
| | - Ya Luo
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
| | - Rong-Gao Gong
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
| | - Fen Zhang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
| | - Hao-Ru Tang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu 611130, China.
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13
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Wang Y, Chen Q, Chen T, Zhang J, He W, Liu L, Luo Y, Sun B, Zhang Y, Tang HR, Wang XR. Allopolyploid origin in Rubus (Rosaceae) inferred from nuclear granule-bound starch synthase I (GBSSI) sequences. BMC Plant Biol 2019; 19:303. [PMID: 31291892 PMCID: PMC6617891 DOI: 10.1186/s12870-019-1915-7] [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] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Accepted: 07/02/2019] [Indexed: 05/09/2023]
Abstract
BACKGROUND Polyploidy and hybridization are ubiquitous in Rubus L., a large and taxonomically challenging genus. Chinese Rubus are mainly concentrated into two major sections, the diploid Idaeobatus and the polyploid Malachobatus. However, it remains unclear to be auto- or allo- polyploid origin of polyploids in Rubus. We investigated the homoeologs and the structure of the GBSSI-1 (granule-bound starch synthase I) gene in 140 Rubus individuals representing 102 taxa in 17 (out of the total 24) subsections of 7 (total of 12) sections at different ploidy levels. RESULTS Based on the gene structure and sequence divergence, we defined three gene variants, GBSSI-1a, GBSSI-1b, and GBSSI-1c. When compared with GBSSI-1a, both GBSSI-1b and GBSSI-1c have a shorter fourth intron, and GBSSI-1c had an additional deletion in the fifth intron. For diploids, either GBSSI-1a or GBSSI-1b was detected in 56 taxa consisting of 82 individuals from sect. Idaeobatus, while both alleles existed in R. pentagonus and R. peltatus. Both homoeologs GBSSI-1a and GBSSI-1b were identified in 39 taxa (48 individuals) of Malachobatus polyploids. They were also observed in two sect. Dalibardastrum taxa, in one sect. Chamaebatus taxon, and in three taxa from sect. Cylactis. Interestingly, all three homoeologs were observed in the three tetraploid taxa. Phylogenetic trees and networks suggested two clades (I and II), corresponding to GBSSI-1a, and GBSSI-1b/1c sequences, respectively. GBSSI-1 homoeologs from the same polyploid individual were resolved in different well-supported clades, and some of these homoelogs were more closely related to homoelogs in other species than they were to each other. This implied that the homoeologs of these polyploids were donated by different ancestral taxa, indicating their allopolyploid origin. Two kinds of diploids hybridized to form most allotetraploid species. The early-divergent diploid species with GBSSI-1a or -1b emerged before polyploid formation in the evolutionary history of Rubus. CONCLUSION This study provided new insights into allopolyploid origin and evolution from diploid to polyploid within the genus Rubus at the molecular phylogenetic level, consistent with the taxonomic treatment by Yü et al. and Lu.
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Affiliation(s)
- Yan Wang
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, China
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Qing Chen
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Tao Chen
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Jing Zhang
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, China
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Wen He
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Lin Liu
- Xizang Agriculture and Animal Husbandry College, Linzhi, China
| | - Ya Luo
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Bo Sun
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Yong Zhang
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Hao-Ru Tang
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, China
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Xiao-Rong Wang
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, China.
- College of Horticulture, Sichuan Agricultural University, Chengdu, China.
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Sun B, Jiang M, Liang S, Zheng H, Chen Q, Wang Y, Lin YX, Liu ZJ, Wang XR, Zhang F, Tang HR. Functional differences of BaPDS1 and BaPDS2 genes in Chinese kale. R Soc Open Sci 2019; 6:190260. [PMID: 31417731 PMCID: PMC6689629 DOI: 10.1098/rsos.190260] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 06/14/2019] [Indexed: 05/19/2023]
Abstract
This study presents a systematic analysis of the functional differences between two genes that encode phytoene desaturase (PDS) in Chinese kale. The promoter sequences of both BaPDS1 and BaPDS2 were amplified and cloned, and their lengths were 2005 bp and 2000 bp, respectively. The mining of cis-acting elements in the promoters showed that the two BaPDS genes are mainly associated with light and phytohormone responsiveness. Light quality, light intensity and plant hormone treatments were conducted in seedlings of Chinese kale, and the results indicated that the response of the two genes to different factors differed. Among them, BaPDSs collectively respond to the treatment with salicylic acid and abscisic acid. With regard to response differences, BaPDS1 is sensitive to red and blue light, blue light, and strong light, while BaPDS2 responds to blue light, weak light, darkness, gibberellin and methyl jasmonate. In addition, both BaPDS1 and BaPDS2 are likely targeted to the chloroplast. Furthermore, single and double mutants of BaPDSs were generated via CRISPR/Cas9 technology. Phenotypic analysis showed that the double mutant with edited PDS1 and PDS2 was a pure albino, while the single mutants with edited PDS1 or PDS2 were partly whitened. In summary, BaPDS1 and BaPDS2 genes played different and indispensable roles in Chinese kale, and their functions were partially complementary.
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Affiliation(s)
- Bo Sun
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - Min Jiang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - Sha Liang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - Hao Zheng
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - Qing Chen
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - Yan Wang
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - Yuan-xiu Lin
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - Ze-Jing Liu
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - Xiao-Rong Wang
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - Fen Zhang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
- Authors for correspondence: Fen Zhang e-mail:
| | - Hao-Ru Tang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
- Authors for correspondence: Hao-Ru Tang e-mail:
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Sun B, Tian YX, Chen Q, Zhang Y, Luo Y, Wang Y, Li MY, Gong RG, Wang XR, Zhang F, Tang HR. Variations in the glucosinolates of the individual edible parts of three stem mustards ( Brassica juncea). R Soc Open Sci 2019; 6:182054. [PMID: 30891304 PMCID: PMC6408409 DOI: 10.1098/rsos.182054] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 01/14/2019] [Indexed: 05/20/2023]
Abstract
The composition and content of glucosinolates were investigated in the edible parts (petioles, peel and flesh) of tuber mustard, bamboo shoots mustard and baby mustard by high-performance liquid chromatography to reveal the association between the different cooking methods and their glucosinolate profiles. Eight glucosinolates were identified from tuber mustard and baby mustard, including three aliphatic glucosinolates, four indole glucosinolates and one aromatic glucosinolate. Only six of the eight glucosinolates were detected in bamboo shoots mustard. The results show that the distribution and content of glucosinolates varied widely among the different tissues and species. The highest contents of glucosinolates in tuber mustard, bamboo shoots mustard and baby mustard were found in flesh, petioles and peel, respectively. The content of total glucosinolates ranged from 5.21 µmol g-1 dry weight in bamboo shoots mustard flesh to 25.64 µmol g-1 dry weight in baby mustard peel. Aliphatic glucosinolates were predominant in the three stem mustards, followed by indole and aromatic glucosinolates. Sinigrin was the predominant glucosinolate in the three stem mustards. Sinigrin content in tuber mustard was slightly higher than that in baby mustard and much higher than that in bamboo shoots mustard, suggesting that the pungent-tasting stem mustards contained more sinigrin. In addition, a principal components analysis showed that bamboo shoots mustard was distinguishable from the other two stem mustards. A variance analysis indicated that the glucosinolates were primarily influenced by a species × tissue interaction. The correlations among glucosinolates were also analysed.
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Affiliation(s)
- Bo Sun
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - Yu-Xiao Tian
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - Qing Chen
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - Yong Zhang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - Ya Luo
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - Yan Wang
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - Meng-Yao Li
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - Rong-Gao Gong
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - Xiao-Rong Wang
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - Fen Zhang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
- Authors for correspondence: Fen Zhang e-mail:
| | - Hao-Ru Tang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
- Authors for correspondence: Hao-Ru Tang e-mail:
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16
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Chen Q, Wang Y, Sun B, Chen T, Luo Y, Zhang Y, Wang XR, Tang HR. The complete chloroplast genome sequence of Rubus coreanus, an excellent diseases-resistant resource. Mitochondrial DNA B Resour 2019. [DOI: 10.1080/23802359.2018.1546139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Affiliation(s)
- Qing Chen
- Department of Horticulture, College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Yan Wang
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, China
| | - Bo Sun
- Department of Horticulture, College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Tao Chen
- Department of Horticulture, College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Ya Luo
- Department of Horticulture, College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Yong Zhang
- Department of Horticulture, College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Xiao-Rong Wang
- Department of Horticulture, College of Horticulture, Sichuan Agricultural University, Chengdu, China
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, China
| | - Hao-Ru Tang
- Department of Horticulture, College of Horticulture, Sichuan Agricultural University, Chengdu, China
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, China
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17
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Chen T, Hu GP, Wang Y, Chen Q, Wang L, Zhang J, Tang HR, Wang XR. Characterization of complete chloroplast genome and phylogenetic analysis of sweet cherry Cerasus avium (L.) Moench (Prunoideae, Rosaceae). Mitochondrial DNA B Resour 2018; 3:1274-1275. [PMID: 33474490 PMCID: PMC7800472 DOI: 10.1080/23802359.2018.1532835] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Accepted: 08/31/2018] [Indexed: 11/16/2022] Open
Abstract
Sweet cherry (Cerasus avium (L.) Moench) belonging to family Rosaceae, is an important economical fruit crop worldwide. In this study, the complete chloroplast (cp) genome of sweet cherry was generated by De novo assembly with low coverage whole-genome sequencing data. The genome size was 157,987 bp in length consisting of a typical quadripartite structure; a large single-copy region (LSC, 85,975 bp), a small single-copy region (SSC, 19,121 bp) and a pair of inverted repeat regions (IRs, 26,445 bp each). A total of 115 genes were predicted including 82 protein-coding genes, 29 tRNA genes and four rRNA genes. Phylogenetic analysis based on 12 reported complete chloroplast genome indicated the monophyly of the genus Creasus including newly sequenced C. avium, which is conform to the traditional classification.
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Affiliation(s)
- Tao Chen
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Guo-Ping Hu
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Yan Wang
- Institute of Pomology and Olericulture Sichuan Agricultural University, Chengdu, China
| | - Qing Chen
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Lei Wang
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Jing Zhang
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Hao-Ru Tang
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Xiao-Rong Wang
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
- Institute of Pomology and Olericulture Sichuan Agricultural University, Chengdu, China
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18
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Sun B, Tian YX, Zhang F, Chen Q, Zhang Y, Luo Y, Wang XR, Lin FC, Yang J, Tang HR. Variations of Alkaloid Accumulation and Gene Transcription in Nicotiana tabacum. Biomolecules 2018; 8:E114. [PMID: 30326637 PMCID: PMC6315566 DOI: 10.3390/biom8040114] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 10/05/2018] [Accepted: 10/05/2018] [Indexed: 11/30/2022] Open
Abstract
To increase the understanding of alkaloid biosynthesis in Nicotiana tabacum during whole plant growth periods, variations of the contents of alkaloids and the transcription of key biosynthetic genes in fresh leaves were investigated in three varieties at five developmental stages. Six alkaloids were analyzed by gas chromatograph⁻mass spectrometry (GC⁻MS) and the most abundant alkaloid was observed during the upper leaves maturing stage in the varieties, among which the alkaloid content of K326 was the highest. Considering the genetic effect, variance analysis indicated that the developmental stage played a predominant role in alkaloid accumulation. Moreover, the levels of biosynthetic gene transcripts in the leaves at the vigorous growing stage might contribute to the contents of alkaloids in the leaves during the maturing stages. To further illuminate the metabolism of alkaloid biosynthesis, a correlation among alkaloids was also documented.
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Affiliation(s)
- Bo Sun
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
- Zhengzhou Tobacco Research Institute, Zhengzhou 450001, China.
| | - Yu-Xiao Tian
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
| | - Fen Zhang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
- Zhengzhou Tobacco Research Institute, Zhengzhou 450001, China.
| | - Qing Chen
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
| | - Yong Zhang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
| | - Ya Luo
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
| | - Xiao-Rong Wang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
| | - Fu-Cheng Lin
- Zhengzhou Tobacco Research Institute, Zhengzhou 450001, China.
| | - Jun Yang
- Zhengzhou Tobacco Research Institute, Zhengzhou 450001, China.
| | - Hao-Ru Tang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
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Chen T, Wang Y, Wang L, Chen Q, Zhang J, Tang HR, Wang XR. The complete chloroplast genome of Tomentosa cherry Prunus tomentosa (Prunoideae, Rosaceae). Mitochondrial DNA B Resour 2018; 3:672-673. [PMID: 33474280 PMCID: PMC7800790 DOI: 10.1080/23802359.2018.1476068] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Prunus tomentosa belongs to subgenus Lithocerasus in family Rosaceae. It is native to northern China and has become a staple back yard garden plant in Russia and much of Eastern Europe. In this study, de novo assembly with low coverage whole genome sequencing facilitated to generate the complete chloroplast (cp) genome of P. tomentosa. The genome size is 158,356 bp in length. It exhibited a typical quadripartite structure comprising a large single copy region (LSC, 86,630 bp), a small single copy region (SSC, 19,010 bp) and a pair of inverted repeat regions (IRs, 26,358 bp each). A total of 115 genes were predicted including 82 protein-coding genes, 29 tRNA genes, and four rRNA genes. Phylogenetic analysis indicated that P. tomentosa is most closely related to P. mume suggesting the phylogenetic relationship between P. tomentosa and subgenus prunpphora.
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Affiliation(s)
- Tao Chen
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Yan Wang
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, China
| | - Lei Wang
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Qing Chen
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, China
| | - Jing Zhang
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
| | - Hao-Ru Tang
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, China
| | - Xiao-Rong Wang
- College of Horticulture, Sichuan Agricultural University, Chengdu, China
- Institute of Pomology and Olericulture, Sichuan Agricultural University, Chengdu, China
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20
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Sun B, Zheng AH, Zhang F, Wei KS, Chen Q, Luo Y, Zhang Y, Wang XR, Lin FC, Yang J, Tang HR. Metabolic profiles of Cuibi-1 and Zhongyan-100 flue-cured tobacco leaves in different growing regions by gas chromatography/mass spectrometry. R Soc Open Sci 2018; 5:180261. [PMID: 29892458 PMCID: PMC5990828 DOI: 10.1098/rsos.180261] [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] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Accepted: 04/18/2018] [Indexed: 06/08/2023]
Abstract
The metabolic profiles of tobacco leaves of two differential Chinese cultivars from different growing regions were analysed using gas chromatography-mass spectrometry (GC-MS). The results of principal component analysis, partial least-squares discriminant analysis and hierarchical cluster analysis showed significant differences in metabolome among three groups, identified 24 differential metabolites, and analysed the metabolic pathway in which the metabolites were involved. Among them, 13 metabolites were associated with geographical regions, including seven organic and fatty acids, four carbohydrates and two secondary metabolites. Four amino acids and two monosaccharides were associated with cultivars and the remaining five metabolites were associated with both. The relationships among the differential metabolites and the distinct characteristics of environment and cultivar were further discussed. In addition, correlation analysis indicated that most of the differential carbohydrates were negatively correlated with the differential amino acids and organic acids. Taken together, this study demonstrates the metabolite differences between two cultivars in different regions, and highlights the effect of environment and cultivar on tobacco leaf metabolism.
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Affiliation(s)
- Bo Sun
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
- Zhengzhou Tobacco Research Institute, Zhengzhou 450001, People's Republic of China
| | - Ai-Hong Zheng
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - Fen Zhang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
- Zhengzhou Tobacco Research Institute, Zhengzhou 450001, People's Republic of China
| | - Ke-Su Wei
- Guizhou Academy of Tobacco Science, Guiyang 550081, People's Republic of China
| | - Qing Chen
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - Ya Luo
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - Yong Zhang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - Xiao-Rong Wang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - Fu-Cheng Lin
- Zhengzhou Tobacco Research Institute, Zhengzhou 450001, People's Republic of China
| | - Jun Yang
- Zhengzhou Tobacco Research Institute, Zhengzhou 450001, People's Republic of China
| | - Hao-Ru Tang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
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21
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He W, Wang Y, Chen Q, Sun B, Tang HR, Pan DM, Wang XR. Dissection of the Mechanism for Compatible and Incompatible Graft Combinations of Citrus grandis (L.) Osbeck ('Hongmian Miyou'). Int J Mol Sci 2018; 19:E505. [PMID: 29419732 PMCID: PMC5855727 DOI: 10.3390/ijms19020505] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 01/24/2018] [Accepted: 01/27/2018] [Indexed: 01/09/2023] Open
Abstract
'Hongmian miyou' (Citrus grandis L. Osbeck) is mutated from 'Guanxi miyou', with a different spongy layer coloration. Trifoliate orange (Poncirus trifoliata) is widely used as rootstocks in 'Guanxi miyou' grafting, whereas 'Hongmian miyou' is incompatible with available trifoliate orange rootstocks. To explore the reasons for the etiolation of leaves of 'Hongmian miyou'/trifoliate orange, anatomical differences among different graft unions, gene expression profiles, and auxin levels of scion were investigated in this study. A histological assay indicated that there was no significant difference in anatomical structure between the compatible and incompatible combinations. A total of 1950 significant differentially-expressed genes (DEGs) were identified and analyzed. The Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analysis revealed that genes involved in carbohydrate metabolism, energy metabolism, amino acid metabolism, and plant hormone signal transduction were significantly enriched. Moreover, the expression of nine genes in the auxin pathway were upregulated and three were downregulated in compatible combinations compared with those in the incompatible group. Further experiments verified that indole-3-acetic acid (IAA) content increases in the compatible graft combination, which suggests that IAA might promote graft compatibility.
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Affiliation(s)
- Wen He
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
| | - Yan Wang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
| | - Qing Chen
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
| | - Bo Sun
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
| | - Hao-Ru Tang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
| | - Dong-Ming Pan
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
| | - Xiao-Rong Wang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
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22
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Sun B, Tian YX, Jiang M, Yuan Q, Chen Q, Zhang Y, Luo Y, Zhang F, Tang HR. Variation in the main health-promoting compounds and antioxidant activity of whole and individual edible parts of baby mustard (Brassica juncea var. gemmifera). RSC Adv 2018; 8:33845-33854. [PMID: 35548826 PMCID: PMC9086739 DOI: 10.1039/c8ra05504a] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Accepted: 09/21/2018] [Indexed: 11/21/2022] Open
Abstract
The main differences of health-promoting compounds and antioxidant activity of whole and individual edible parts of baby mustard were demonstrated.
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Affiliation(s)
- Bo Sun
- College of Horticulture
- Sichuan Agricultural University
- Chengdu 611130
- China
| | - Yu-Xiao Tian
- College of Horticulture
- Sichuan Agricultural University
- Chengdu 611130
- China
| | - Min Jiang
- College of Horticulture
- Sichuan Agricultural University
- Chengdu 611130
- China
| | - Qiao Yuan
- College of Horticulture
- Sichuan Agricultural University
- Chengdu 611130
- China
| | - Qing Chen
- College of Horticulture
- Sichuan Agricultural University
- Chengdu 611130
- China
| | - Yong Zhang
- College of Horticulture
- Sichuan Agricultural University
- Chengdu 611130
- China
| | - Ya Luo
- College of Horticulture
- Sichuan Agricultural University
- Chengdu 611130
- China
| | - Fen Zhang
- College of Horticulture
- Sichuan Agricultural University
- Chengdu 611130
- China
| | - Hao-Ru Tang
- College of Horticulture
- Sichuan Agricultural University
- Chengdu 611130
- China
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23
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Chen T, Zhang J, Liu Y, Wang H, Wang J, Chen Q, Tang HR, Wang XR. The complete chloroplast genome sequence of Maddenia hypoleuca koehne (Prunoideae, Rosaceae). Mitochondrial DNA A DNA Mapp Seq Anal 2015; 27:4651-4652. [PMID: 26709445 DOI: 10.3109/19401736.2015.1106486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Maddenia hypoleuca Koehne belonging to family Rosaceae is a native species in China. The complete chloroplast (cp) genome was generated by de novo assembly using low coverage whole genome sequencing data and manual correction. The cp genome was 158 084 bp in length, with GC content of 36.63%. It exhibited a typical quadripartite structure: a pair of large inverted repeat regions (IRs, 26 246 bp each), a large single-copy region (LSC, 86 713 bp), and a small single-copy region (SSC, 18 879 bp). A total of 114 genes were predicted, which included 80 protein-coding genes, 30 tRNA genes, and four rRNA genes. Phylogenetic analysis indicated that M. hypoleuca is most closely related to Prunus padus within the Prunoideae subfamily, which conforms to the traditional classification.
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Affiliation(s)
- Tao Chen
- a College of Horticulture, Sichuan Agricultural University , Chengdu , China and
| | - Jing Zhang
- a College of Horticulture, Sichuan Agricultural University , Chengdu , China and
| | - Yin Liu
- a College of Horticulture, Sichuan Agricultural University , Chengdu , China and
| | - Hao Wang
- a College of Horticulture, Sichuan Agricultural University , Chengdu , China and
| | - Juan Wang
- a College of Horticulture, Sichuan Agricultural University , Chengdu , China and
| | - Qing Chen
- a College of Horticulture, Sichuan Agricultural University , Chengdu , China and
| | - Hao-Ru Tang
- a College of Horticulture, Sichuan Agricultural University , Chengdu , China and
| | - Xiao-Rong Wang
- a College of Horticulture, Sichuan Agricultural University , Chengdu , China and.,b Institute of Pomology and Olericulture, Sichuan Agricultural University , Chengdu , China
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24
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Sun B, Xue SL, Zhang F, Luo ZP, Wu MZ, Chen Q, Tang HR, Lin FC, Yang J. A Quantitative Real-Time PCR-Based Strategy for Molecular Evaluation of Nicotine Conversion in Burley Tobacco. Int J Mol Sci 2015; 16:27422-32. [PMID: 26593897 PMCID: PMC4661896 DOI: 10.3390/ijms161126038] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Revised: 11/05/2015] [Accepted: 11/10/2015] [Indexed: 12/04/2022] Open
Abstract
Nornicotine production in Nicotiana tabacum is undesirable because it is the precursor of the carcinogen N'-nitrosonornicotine. In some individual burley tobacco plants, a large proportion of the nicotine can be converted to nornicotine, and this process of nicotine conversion is mediated primarily by enzymatic N-demethylation of nicotine which is controlled mainly by CYP82E4. Here we report a novel strategy based on quantitative real-time polymerase chain reaction (qPCR) method, which analyzed the ratio of nicotine conversion through examining the transcript level of CYP82E4 in burley leaves and do not need ethylene induction before detected. The assay was linear in a range from 1 × 10¹ to 1 × 10⁵ copies/mL of serially diluted standards, and also showed high specificity and reproducibility (93%-99%). To assess its applicability, 55 plants of burley cultivar Ky8959 at leaf maturing stage were analyzed, and the results were in accordance with those from gas chromatograph-mass spectrometry (GC-MS) method. Moreover, a linear correlation existed between conversion level and CYP82E4 transcript abundance. Taken together, the quantitative real-time PCR assay is standardized, rapid and reproducible for estimation of nicotine conversion level in vivo, which is expected to shed new light on monitoring of burley tobacco converter.
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Affiliation(s)
- Bo Sun
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
- National Tobacco Gene Center, Zhengzhou Tobacco Research Institute, Zhengzhou 450001, China.
| | - Sheng-Ling Xue
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
| | - Fen Zhang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
- National Tobacco Gene Center, Zhengzhou Tobacco Research Institute, Zhengzhou 450001, China.
| | - Zhao-Peng Luo
- National Tobacco Gene Center, Zhengzhou Tobacco Research Institute, Zhengzhou 450001, China.
| | - Ming-Zhu Wu
- National Tobacco Gene Center, Zhengzhou Tobacco Research Institute, Zhengzhou 450001, China.
| | - Qing Chen
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
| | - Hao-Ru Tang
- College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China.
| | - Fu-Cheng Lin
- National Tobacco Gene Center, Zhengzhou Tobacco Research Institute, Zhengzhou 450001, China.
| | - Jun Yang
- National Tobacco Gene Center, Zhengzhou Tobacco Research Institute, Zhengzhou 450001, China.
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25
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Chen Q, Yu HW, Wang XR, Xie XL, Yue XY, Tang HR. An alternative cetyltrimethylammonium bromide-based protocol for RNA isolation from blackberry (Rubus L.). Genet Mol Res 2012; 11:1773-82. [PMID: 22843054 DOI: 10.4238/2012.june.29.10] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [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
Isolation of high-quality RNA free of contaminants, such as polyphenols, proteins, plant secondary metabolites, and genomic DNA from plant tissues, is usually a challenging but crucial step for molecular analysis. We developed a novel protocol based on the cetyltrimethylammonium bromide method to isolate high-quality RNA from blackberry plant tissues, especially fruits. Most DNA was removed when acetic acid was utilized, before RNA precipitation. Thus, lithium chloride, a reagent widely used for RNA purification, was not needed. The isolation time was shortened to less than 3 h. The RNA was quite pure, with little DNA contamination. The quality of the RNA was assessed by spectrophotometric readings and electrophoresis on agarose gels. It was good enough for downstream enzymatic reactions, such as reverse transcription-PCR, cloning and real-time PCR assay. The method yielded an amount of total RNA comparable to previously described protocols.
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Affiliation(s)
- Q Chen
- College of Horticulture, Sichuan Agricultural University, Sichuan, PR China
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Tang HR, Covington AD, Hancock RA. Structure-activity relationships in the hydrophobic interactions of polyphenols with cellulose and collagen. Biopolymers 2004; 70:403-13. [PMID: 14579312 DOI: 10.1002/bip.10499] [Citation(s) in RCA: 113] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Polyphenol interactions with both cellulose and collagen in the solid state have been studied by using chromatography on cellulose and by evaluating the hydrothermal stability of the polyphenol treated sheepskin collagen. Twenty-four polyphenolic compounds were studied, including seven glucose-based gallotannins, five polyalcohol-based gallotannins, and twelve ellagitannins. In the cellulose-polyphenols systems, the polyphenol's affinity to cellulose is positively correlated with their molecular masses, the number of galloyl groups, and their hydrophobicity (logP). The polyphenol treatment increased the hydrothermal stability of collagen samples, and such effects are also positively correlated with the molecular masses, total number of galloyl groups and the hydrophobicity of polyphenols. Ellagitannins showed much weaker interactions with both biopolymers than gallotannins having similar molecular mass, the same number of galloyl groups, and the same number of phenolic hydroxyl groups. It is concluded that, for the polyphenol interactions with both cellulose and collagen, (1) the galloyl group of polyphenols is the functional group; (2) the strength of interactions are positively correlated with molecular size, the number of galloyl groups and the hydrophobicity of polyphenols; (3) the hydrophobic interactions are of great significance; and (4) the interactions are strongly dependent on the flexibility of galloyl groups.
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Affiliation(s)
- H R Tang
- Department of Chemistry, Royal Holloway, University of London, Egham Hill, Egham, Surrey TW20 0EX, UK.
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27
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Tang HR, Covington AD, Hancock RA. Use of DSC to detect the heterogeneity of hydrothermal stability in the polyphenol-treated collagen matrix. J Agric Food Chem 2003; 51:6652-6656. [PMID: 14582955 DOI: 10.1021/jf034380u] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The hydrothermal stability of the collagen matrixes treated with plant polyphenols (tannins) depends on not only the strength of the polyphenol-collagen interactions but also the distribution uniformity of polyphenolic molecules within the collagen fibrils. Traditional methods of uniformity tests rely heavily on the expertise of workers and are thus subjective. This paper describes a differential scanning calorimetry (DSC) study of the sheepskin collagen samples treated with hydrolyzable tannins, including two commercial tannins' extracts (chestnut and valonea), two pure ellagitannins (vescalagin and castalagin), and six synthetic gallotannins (di-galloyl-ethylene glycol (DGE), tri-galloyl-glycerol, tetra-galloyl-meso-erythritol, penta-galloyl-adonitol, penta-galloyl-glucose, and hexa-galloyl-ducitol). The collagen sample without polyphenol treatment and the sample treated with DGE showed a single sharp peak in their DSC thermogram with a full peak width at half height (fwhh) of 3-4 degrees C. The samples treated with other tannins all showed multiple peak DSC profiles with the fwhh of each peak at about 3-4 degrees C. These multiple peak profiles imply that in these polyphenol-treated samples, there is a distribution of collagen molecules having different hydrothermal stability. The results have demonstrated that DSC offers an objective method to detect the stability heterogeneity of collagen matrixes in the solid state, providing a useful tool for the leather industry to evaluate the uniformity of leather tanning.
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Affiliation(s)
- H R Tang
- Department of Chemistry, Royal Holloway, University of London, Egham Hill, Egham, Surrey TW20 0EX, United Kingdom.
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Abstract
Molecular motions of polycrystalline cellobiose have been investigated by measuring proton spin-lattice relaxation times, T1 and T1rho, and the second moment, M2, in both protonated and D2O exchanged forms over the temperature range 120-380 K. T1 relaxation is dominated by the motions of hydroxyl groups between 150 and 380 K, characterised by an activation energy of about 8.74 kJ/mol, whereas T1rho relaxation is driven by the motions of the same groups between 120 and 300 K. T1rho results suggest that hydroxyl groups have a distribution of dynamics. Motion of methylene groups was detected in the second-moment experiments at about 350 K, characterised by activation energy of about 40 kJ/mol. Consideration of the calculated and observed rigid-lattice second moments suggests that the reported X-ray data are incorrect for the inter-proton distance on C6'. 13C CPMAS spectra of both protonated and deuterated cellobiose have also been measured. Spectra of the deuterated material showed the existence of a second crystalline form in addition to the normal form.
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Affiliation(s)
- H R Tang
- Institute of Food Research, Norwich Research Park, Colney, UK.
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29
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Matthay KK, Panina C, Huberty J, Price D, Glidden DV, Tang HR, Hawkins RA, Veatch J, Hasegawa B. Correlation of tumor and whole-body dosimetry with tumor response and toxicity in refractory neuroblastoma treated with (131)I-MIBG. J Nucl Med 2001; 42:1713-21. [PMID: 11696644] [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: 02/22/2023] Open
Abstract
UNLABELLED The purpose of our study was to determine the effect of tumor-targeted radiation in neuroblastoma by correlating administered (131)I-metaiodobenzylguanidine (MIBG) activity to tumor and whole-body dosimetry, tumor volume change, overall response, and hematologic toxicity. METHODS Eligible patients had MIBG-positive lesions and tumor-free, cryopreserved hematopoietic stem cells. Activity was administered according to body weight and protocol as part of a phase I and phase II study. The whole-body radiation dose was derived from daily 1-m exposure measurements, the tumor self-absorbed radiation dose (TSARD) was determined from scintillation-camera conjugate views, and the tumor volume was measured using CT or MRI. RESULTS Forty-two patients with refractory neuroblastoma (16 with prior hematopoietic stem cell transplant) received a median activity of 555 MBq/kg (15 mCi/kg) (range, 93-770 MBq/kg) and a median total activity of 11,470 MBq (310 mCi) (range, 3,330-30,969 MBq). The median whole-body radiation dose was 228 cGy (range, 57-650 cGy) and the median TSARD was 3,300 cGy (range, 312-30,500 cGy). Responses among evaluable patients included 16 partial response, 3 mixed response, 14 stable disease, and 9 progressive disease. Higher TSARD values predicted better overall disease response (P < 0.01). The median decrease in tumor volume was 19%; 18 tumors decreased, 4 remained stable, and 5 increased in size. Correlation was seen between administered activity per kilogram and whole-body dose as well as hematologic toxicity (assessed by blood platelet and neutrophil count nadir) (P < 0.05). The median whole-body dose was higher in the 11 patients who required hematopoietic stem cell infusion for prolonged neutropenia versus the 31 patients who did not (323 vs. 217 cGy; P = 0.03). CONCLUSION Despite inaccuracies inherent in dosimetry methods, (131)I-MIBG activity per kilogram correlated with whole-body radiation dose and hematologic toxicity. The TSARD by conjugate planar imaging predicted tumor volume decrease and also correlated with overall tumor response.
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Affiliation(s)
- K K Matthay
- Department of Pediatrics, University of California, San Francisco, San Francisco, California 94143-0106, USA
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30
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Da Silva AJ, Tang HR, Wong KH, Wu MC, Dae MW, Hasegawa BH. Absolute quantification of regional myocardial uptake of 99mTc-sestamibi with SPECT: experimental validation in a porcine model. J Nucl Med 2001; 42:772-9. [PMID: 11337575] [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: 02/20/2023] Open
Abstract
UNLABELLED We have evaluated a method for absolute in vivo quantification of 99mTc-sestamibi uptake in a porcine model of myocardial perfusion. METHODS Correlated CT and radionuclide images were obtained from eight adult pigs using a combined CT-SPECT imaging system. In each case, the CT image is used to generate an object-specific attenuation map that is incorporated into an iterative algorithm for reconstruction and attenuation correction of the radionuclide image. Anatomic information available from the correlated CT image is used to correct the radionuclide image for partial-volume errors by mathematically modeling the radionuclide imaging process. A volume of interest, or template, that approximates the geometric extent of the myocardium is defined from the CT image. Once defined, the template is assigned unit activity and is mathematically projected using a realistic physical model of the radionuclide imaging process including nonideal collimation and object-specific attenuation. The template is then reconstructed from these projections to obtain a pixel-by-pixel partial-volume correction for the myocardium in the radionuclide image. The CT image is also used to delimit the anatomic boundaries of the myocardium for quantification of the radionuclide images. The pixel intensities in the corrected radionuclide image are calibrated in units of activity concentration (MBq/g) and compared with the ex vivo activity concentration measured directly from the excised myocardium. RESULTS Without corrections, the measured in vivo activity concentration in the porcine myocardium was only 10% of the true value. Correcting for object-specific attenuation improved the accuracy of this measurement but resulted in values that were still only 42% of the true value. By correcting for both attenuation and partial-volume errors, we were able to achieve absolute quantification with an accuracy error near 10%. CONCLUSION We have shown that, by applying object-specific attenuation corrections and suitable partial-volume corrections, absolute regional activity concentration can be measured accurately in the porcine myocardium.
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Affiliation(s)
- A J Da Silva
- Department of Radiology and Cardiovascular Research Institute, University of California at San Francisco, San Francisco 94080, USA
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31
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Abstract
The diffusion propagator of the continuous aqueous phase of concentrated oil-in-water emulsions is used to probe the relationship between emulsion microstructure and bulk rheological properties. This is done by expanding the stimulated echo amplitude, S(q,Delta), as a multiple exponential time series expansion in Delta, with wavevector dependent expansion coefficients. These coefficients are compared with predictions from several theoretical models for three types of stable emulsion, each differing in microstructure. Empiric relationships between the wavevector expansion coefficients and bulk rheology are established.
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Affiliation(s)
- B P Hills
- Institute of Food Research, Norwich Research Park, NR4 7UA, Colney, Norwich, UK.
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32
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Abstract
Crystalline alpha-D-galacturonic acid monohydrate has been studied by 13C CPMAS NMR and X-ray crystallography. The molecular dynamics were investigated by evaluating 13C spin-lattice relaxation in the rotating frame (T1rho) and chemical-shift-anisotropy properties of each carbon. Only limited molecular motions can be detected in the low frequency (< 10(4) Hz) range by 13C relaxation time measurements (T1rho) and changes of chemical shift anisotropy properties as a function of temperature. X-ray analysis (at both ambient temperature and 150 K) shows that the acid has the usual chair-shaped, pyranose ring conformation, and that the acid and water molecules are linked, through all their O-H groups, in an extensively hydrogen-bonded lattice.
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Affiliation(s)
- H R Tang
- Institute of Food Research, Norwich Laboratory, Norwich Research Park, Colney, UK
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33
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Tang HR, Da Silva AJ, Matthay KK, Price DC, Huberty JP, Hawkins RA, Hasegawa BH. Neuroblastoma imaging using a combined CT scanner-scintillation camera and 131I-MIBG. J Nucl Med 2001; 42:237-47. [PMID: 11216522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023] Open
Abstract
UNLABELLED High-dose administration of 131I-metaiodobenzylguanidine (131I-MIBG) continues to be a promising treatment for neuroblastoma. However, currently used methods of estimating 131I-MIBG uptake in vivo may be too inaccurate to properly monitor patient radiation exposure doses. To improve localization and uptake measurements over currently practiced techniques, we evaluated different methodologies that take advantage of the correlated patient data available from a combined CT-scintillation camera imaging system. METHODS Serial CT and radionuclide scans of three patients were obtained on a combined imaging system. SPECT images were reconstructed using both filtered backprojection and maximum-likelihood expectation maximization (MLEM). Volumes of interest (VOIs) were defined on anatomic images and automatically correlated to spatial volumes in reconstructed SPECT images. Several radionuclide quantification methods were then compared. First, the mean reconstructed values within coregistered SPECT VOIs were estimated from MLEM reconstructed images. Next, we assumed that reconstructed activity in SPECT voxels were linear combinations of activities present in individual objects, weighted by geometric factors derived from CT images. After calculating the weight factors by modeling the SPECT imaging process with anatomically defined VOIs, least-squares fitting was used to estimate the activities within lesion volumes. We also estimated the lesion activities directly from planar radionuclide images of the patients using similar linearity assumptions. Finally, for comparison, lesion activities were estimated using a standard conjugate view method. RESULTS Activities were quantified from three patients having a total of six lesions with volumes ranging from 0.67 to 117 mL. Methods that used CT data to quantify lesion activities gave similar results for planar and tomographic radionuclide data. Estimating activity directly from mean VOI values in MLEM-reconstructed images alone consistently provided estimates lower than CT-aided methods because of the limited spatial resolution of SPECT. Values obtained with conjugate views produced differences up to fivefold in comparison with CT-aided methods. CONCLUSION These results show that anatomic information available from coregistered CT images may improve in vivo localization and measurement of 131I-MIBG uptake in tumors.
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Affiliation(s)
- H R Tang
- Department of Radiology, University of California, San Francisco, USA
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34
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Chen C, Tang HR, Sutcliffe LH, Belton PS. Green tea polyphenols react with 1,1-diphenyl-2-picrylhydrazyl free radicals in the bilayer of liposomes: direct evidence from electron spin resonance studies. J Agric Food Chem 2000; 48:5710-5714. [PMID: 11087543 DOI: 10.1021/jf000807a] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Free radical scavenging reactions of green tea polyphenols (GTP) were investigated with electron spin resonance (ESR) spectroscopy in the phospholipid bilayer of liposomes, using 1, 1-diphenyl-2-picrylhydrazyl (DPPH) radical as a model. The results showed that (1) GTP reacts with DPPH radicals in the bilayer of liposomes of both 1-hexadecanoyl-2-[(cis,cis,cis,cis,cis,cis)-4,7,10, 13,16,19-docosahexaenoyl]-sn-glycero-3-phosphocholine (DHAPC) and 1, 2-di[cis-9-hexadecenoyl]-sn-glycero-3-phosphocholine) (DPPC); and (2) GTP protects DHAPC liposomes effectively from the oxidation initiated by DPPH radicals. These results provide direct evidence that GTP reacts with free radicals in the model membrane and support the hypothesis that GTP protects unsaturated phospholipids from oxidation by reacting directly with the radicals.
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Affiliation(s)
- C Chen
- Institute of Biophysics, Academia Sinica, Beijing 100101, People's Republic of China
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35
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Brown JK, Tang HR, Hattner RS, Bocher M, Ratzlaff NW, Kadkade PP, Hasegawa BH, Botvinick EH. Intrinsic dual-energy processing of myocardial perfusion images. J Nucl Med 2000; 41:1287-97. [PMID: 10914923] [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: 02/17/2023] Open
Abstract
UNLABELLED We have developed a software-based method for processing dual-energy 201TI SPECT emission projection data with the goal of calculating a spatially dependent index of the local impact of gamma-ray attenuation. We refer to this method as intrinsic dual-energy processing (IDEP). METHODS IDEP exploits the differential attenuation of lower energy emissions (69-83 keV) and higher energy emissions (167 keV) resulting from the decay of 201TI to characterize the relative degree of low-energy gamma-ray attenuation throughout the myocardium. In particular, IDEP can be used to estimate the relative probability that a low-energy gamma-ray emitted from a particular region of the myocardium is detected during the acquisition of SPECT projection data. Studies on phantoms and healthy human volunteers were performed to determine whether the IDEP method yielded detection probability images with systematic structure visible above the noise of these images and whether the systematic structure in the detection probability images could be rationalized physically. In patient studies, the relative regional detection probabilities were applied qualitatively to determine the likely effects of attenuation on the distribution of mapped photon emissions. RESULTS Measurements of the detection probability in uniform phantoms showed excellent agreement with those obtained from computer simulations for both 180 degrees and 360 degrees acquisitions. Additional simulations with digital phantoms showed good correlation between IDEP-estimated detection probabilities and calculated detection probabilities. In patient studies, the IDEP-derived detection probability maps showed qualitative agreement with known nonuniform attenuation characteristics of the human thorax. When IDEP data were integrated with the findings on the emission scan, the correlation with coronary anatomy (known in 6 patients and hypothesized on the basis of clinical and electrocardiographic parameters in 5 patients) was improved compared with evaluating the mapped emission image alone. CONCLUSION The IDEP method has the potential to characterize the attenuation properties of an object without use of a separate transmission scan. Coupled with the emission data, it may aid coronary diagnosis.
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Affiliation(s)
- J K Brown
- Physics Research Laboratory, University of California, San Francisco, USA
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Tang HR, Wang YL, Belton PS. 13C CPMAS studies of plant cell wall materials and model systems using proton relaxation-induced spectral editing techniques. Solid State Nucl Magn Reson 2000; 15:239-248. [PMID: 10772266 DOI: 10.1016/s0926-2040(99)00064-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The solid state 13C CPMAS NMR spectra of plant cell walls are often complex owing to superposition of resonances from different polysaccharides and the heterogeneity of the cell wall assembly. In this paper, we describe the application of a set of proton relaxation-induced spectral editing (PRISE) experiments which combine 1H relaxation properties (T1, T1rho, T2) with 13C high resolution spectroscopy (CPMAS) to relate the dynamics of the plant cell walls and model systems to their domain structural details. With PRISE it has been found that in plant cell wall materials, cellulose is always associated with the long components of spin-lattice relaxation in both the laboratory and rotating frames whereas non-cellulose polysaccharides (pectin and hemicellulose) are associated with the short ones. For the proton T2 relaxation, cellulose is only associated with the short component (below 20 micros), pectin contributes to both the short component and the long one.
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Affiliation(s)
- H R Tang
- Institute of Food Research, Norwich Research Park, Colney, UK
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Wang YL, Belton PS, Tang HR. Proton NMR relaxation studies of solid tyrosine derivatives and their mixtures with L-leucinamide. Solid State Nucl Magn Reson 1999; 14:19-32. [PMID: 10408272 DOI: 10.1016/s0926-2040(99)00006-5] [Citation(s) in RCA: 3] [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: 05/23/2023]
Abstract
Proton NMR relaxation time measurements were carried out on solid tyrosine derivatives: acetyl-L-tyrosine ethyl ester (Ac-Tyroet), N-carbobenzyloxy-L-tyrosine ethyl ester (CBZ-Tyroet), N-trifluoroacetyl-L-tyrosine ethyl ester (TFAc-Tyroet) and their mixtures with L-leucinamide. It was found that spin-lattice relaxation was driven mainly by methyl group rotation it low temperature for the pure solids and the mixtures. Benzene ring flipping motion and a third motion (possibly whole molecule tumbling) were found to be responsible for relaxing Ac-Tyroet and CBZ-Tyroet at high temperature. However, these motions were highly hindered in TFAc-Tyroet. Molecular tumbling motion was detected in the supercooled liquid mixtures of L-leuNH/CBZ-Tyroet and L-leuNH/Ac-Tyroet, while this motion is absent in the mixture L-leuNH/TFAc-Tyroet. The hindered motion in TFAc-Tyroet may be one of the factors affecting its ability to form a supercooled liquid with L-leucinamide.
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Affiliation(s)
- Y L Wang
- Institute of Food Research, Norwich Laboratory, UK
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38
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Tang HR, Belton PS. Molecular motions of D-alpha-galacturonic acid (GA) and methyl-D-alpha-galacturonic acid methyl ester (MGAM) in the solid state-A proton NMR study. Solid State Nucl Magn Reson 1998; 12:21-30. [PMID: 9808293 DOI: 10.1016/s0926-2040(98)00041-1] [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: 05/22/2023]
Abstract
The molecular motions of D-alpha-galacturonic acid monohydrate (GA) and its derivative methyl-alpha-D-galacturonic acid methyl ester monohydrate (MGAM) in the solid state have been studied using 1H NMR. Both protonated and deuterium exchanged samples have been used. Spin-lattice relaxation times in the laboratory and rotating frames as well as second moments have been measured over the temperature range 90-370 K. Analysis of results has shown that in GA spin-lattice relaxation is chiefly by hydroxyl groups and water of crystallization. In MGAM, methyl groups dominate spin-lattice relaxation in the laboratory frame at the low temperature. Hydroxyl groups and water of crystallization contribute to the spin-lattice relaxation in the laboratory frame in the high temperature region. In the rotating frame motion of hydroxyl groups and water of crystallization provide the main relaxation pathway. Changes in the static second moment with temperature can be reasonably well predicted using values of correlation time and motionally averaged second moments obtained by fitting the spin-lattice relaxation data. 13C CPMAS spectra for GA and MGAM are also described.
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Affiliation(s)
- H R Tang
- Institute of Food Research, Norwich Research Park, Colney, UK
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39
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Abstract
Scattered radiation is one of several physical perturbations that limit the accuracy of quantitative measurements in single-photon emission computed tomography (SPECT). Improvement in detector energy resolution leads to a reduction of scatter counts and a corresponding improvement in the quantitative accuracy of the SPECT measurement. In this study, simulated SPECT projections of a simple myocardial perfusion phantom were used to investigate the effect of detector energy resolution on the data. The phantom consists of a spherical shell of radionuclide within a 15 cm radius water-filled cylinder. Each projection contains on the order of 3 x 10(5) counts. The results demonstrate that a full-width, half-maximum energy resolution of 3-4 keV is sufficient to render the error due to scatter insignificant compared to the uncertainty due to photon statistics in this case. Further simulations verify that because smaller objects produce less scatter, they can be imaged accurately with degraded energy resolution. These results are useful when designing prototype systems that utilize solid-state detectors and low-noise electronics to achieve improved energy resolution.
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Affiliation(s)
- J A Heanue
- Department of Electrical Engineering and Computer Science, University of California, Berkeley 94720, USA
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40
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Abstract
Current research has focused on the composition of commercially used chestnut tannin extracts so as to provide a quantitative basis for studies of reactions, structure-property relationships, and applications of chestnut tannin extract. Two chestnut tannins, vescalagin and castalagin, have been isolated using chromatography on Sephadex LH-20 and cellulose. The structures of these compounds have been established by means of nuclear magnetic resonance and fast atom bombardment mass spectroscopy. Some other components have been found and analyzed by chromatography and spectroscopy, but their structures have not as yet been completely defined. These structural features, together with quantitative results for each component, provide a better understanding of the mode of action of complex commercial chestnut tannin extracts.
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Affiliation(s)
- H R Tang
- Department of Chemistry, Royal Holloway and Bedford New College, Egham, Surrey, United Kingdom
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