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Jiao Y, Jiang YH, Liu B, Mi RH, Bi LJ, Xu QX. [Analysis of the clinical characteristics of acute myeloid leukemia related to the treatment of hematological and solid tumors]. Zhonghua Zhong Liu Za Zhi 2024; 46:86-95. [PMID: 38246784 DOI: 10.3760/cma.j.cn112152-20231024-00249] [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: 01/23/2024]
Abstract
Objective: To compare and analyze the clinical characteristics of acute myeloid leukemia (AML) related to the treatment of hematological tumors and solid tumors. Methods: The laboratory and clinical data of 41 patients with treatment-related AML (t-AML) in the Department of Hematology, Henan Cancer Hospital from January 2014 to December 2021 were retrospectively analyzed, and they were divided into hematological tumor group and solid tumor group. Survival analysis was performed using the Kaplan-Meier method and Log rank test. Results: The median interval from the first tumor diagnosis to t-AML in 41 patients was 21.0 (16.5-46.0) months; 24 (58.5%) had abnormal expression of lymphoid antigen, 28 (68.3%) had abnormal karyotype, 18 cases (43.9%) were positive for fusion gene, and 28 cases (68.3%) were positive for gene mutation; the median recurrence-free survival (RFS) was 11.0 months, and the median overall survival (OS) was 11.5 months. The proportion of acute promyelocytic leukemia ([APL], 0.0, 0/13), complete response ([CR],18.2%, 2/11), median OS (4.5 months) and median RFS (2.5 months) of t-AML patients in the hematological tumor group were significantly lower than those in the solid tumor group (35.7%, 10/28; 68.0%, 17/25; not reach; not reach), but the proportion of M4 /M5 (93.2%,12/13) was significantly higher than that in the solid tumor group (53.6%,15/18; all P values<0.05). Through subgroup analysis, the proportion of patients with positive PML-RARa and good prognosis karyotypes in the solid tumor group (35.7%, 10/28; 46.4%, 13/28) was significantly higher than that in the hematological tumor group (0.0, 0/13; 0.0, 0/13; P<0.05), while the proportion of patients with intermediate karyotypes (42.9%, 12/28) was significantly lower than that in the hematological tumor group (84.6%, 11/13; P<0.05), the difference was statistically significant. The CR rate (90.0%, 9/10), median OS (not reach) and median RFS (not reach) in the t-APL group were higher than those in the t-AML (without t-APL) group (38.5%, 10/26; 6 months; 8 months; P<0.05). After excluding the effect of t-APL patients, there was no significant difference in the CR rate, median OS and median RFS between the solid tumor group (8; 9 months; not reach) and the hematological tumor group (2; 4 months; 2 months; P>0.05). Univariate analysis showed that the primary tumor belongs to hematological tumor was a common risk factor for OS and RFS in t-AML patients (P<0.10). Conclusions: Compared with patients with t-AML secondary to solid tumors, patients with t-AML secondary to hematological tumors have poorer treatment effects and poorer prognosis. After excluding the effect of t-APL patients, there are no significant differences in the treatment efficacy and prognosis between the two types of t-AML patients.
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Affiliation(s)
- Y Jiao
- Department of Clinical Laboratory, The Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou Key Laboratory of Digestive Tumor Markers, Zhengzhou 450008, China
| | - Y H Jiang
- Department of Clinical Laboratory, The Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou Key Laboratory of Digestive Tumor Markers, Zhengzhou 450008, China
| | - B Liu
- Department of Clinical Laboratory, The Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou Key Laboratory of Digestive Tumor Markers, Zhengzhou 450008, China
| | - R H Mi
- Department of Hematology, The Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou 450008, China
| | - L J Bi
- Key Laboratory of RNA Biology, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China
| | - Q X Xu
- Department of Clinical Laboratory, The Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou Key Laboratory of Digestive Tumor Markers, Zhengzhou 450008, China
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Li HQ, Xia LJ, Jiang YH, Liu L, Xing XF, Tao R, Ma SH. [Efficacy and safety of pulsed radiofrequency combined with gabapentin in the treatment of acute herpetic neuralgia]. Zhonghua Yi Xue Za Zhi 2023; 103:3954-3958. [PMID: 38129173 DOI: 10.3760/cma.j.cn112137-20230921-00517] [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: 12/23/2023]
Abstract
Objective: To explore the clinical efficacy and safety of pulsed radiofrequency (PRF) combined with gabapentin in the treatment of acute herpetic neuralgia (AHN). Methods: A total of 123 AHN patients were retrospectively selected in Henan Provincial People's Hospital from November 2019 to July 2022, who were divided into two groups based on treatment methods: control group (treated with gabapentin, n=61) and study group (treated with gabapentin and PRF, n=62). The visual analog scale (VAS) was utilized for pain severity assessment and the self-rating scale for sleep (SRSS) was utilized for sleep quality evaluation. The differences in serum levels of interleukin (IL)-10, chemokine ligand 10 (CXCL-10), prostaglandin E2 (PGE2), cyclooxygenase-2 (COX-2), IL-2 and IL-6 before and after treatment were compared between the two groups. The overall treatment effectiveness and the occurrence rates of postherpetic neuralgia and adverse reactions were evaluated in both groups. Results: Among the study group patients, 28 were male and 34 were female, and the age was (62.8±8.5) years. Among the control group patients, 35 were male and 26 were female, and the age was (64.0±7.8) years. The VAS scores of the study group before and after treatment were 7.96±1.33 and 1.52±0.60, respectively, while the control group were 7.68±1.52 and 2.70±0.64. The SRSS scores before and after treatment in the study group were 31.74±5.90 and 12.06±2.81, respectively, while those in the control group were 33.10±5.54 and 14.14±2.96, respectively. Before treatment, there were no statistically differences of the VAS scores and SRSS scores in both groups (all P>0.05). After treatment, the VAS scores and SRSS scores in both groups decreased compared with before treatment (all P<0.05), the study group's VAS scores and SRSS scores were lower than those in the control group (all P<0.05). Before treatment, there were no statistically differences of the serum levels of IL-10, CXCL-10, PGE2, COX-2, IL-2 and IL-6 in both groups (all P>0.05). After treatment, the serum levels of IL-10, CXCL-10, PGE2, COX-2 and IL-6 in both groups decreased compared with before treatment, while the IL-2 level increased. Additionally, the study group had lower serum levels of IL-10, PGE2, COX-2 and IL-6 compared with the control group (all P<0.05). After treatment, the study group had 35 cases of cure, 26 cases of effectiveness, and 1 case of ineffectiveness, while the control group had 22 cases of cure, 31 cases of effectiveness, and 8 cases of ineffectiveness. The overall treatment efficacy of the study group was better than that of the control group (P=0.012). The incidence of postherpetic neuralgia in the study group after treatment was 16.1% (10/62), which was lower than that in the control group, which was 37.7% (23/61) (P<0.05). There were no statistically differences of the occurrence rates of adverse reactions in both groups (all P>0.05). Conclusion: Combining PRF with gabapentin for the treatment of AHN demonstrates better overall efficacy and safety, which can more effectively alleviate pain, improve sleep, and reduce inflammatory cytokine levels.
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Affiliation(s)
- H Q Li
- Department of Pain, Henan Provincial People's Hospital, Zhengzhou 450003, China
| | - L J Xia
- Department of Pain, Henan Provincial People's Hospital, Zhengzhou 450003, China
| | - Y H Jiang
- Department of Pain, Henan Provincial People's Hospital, Zhengzhou 450003, China
| | - L Liu
- Department of Pain, Henan Provincial People's Hospital, Zhengzhou 450003, China
| | - X F Xing
- Department of Pain, Henan Provincial People's Hospital, Zhengzhou 450003, China
| | - R Tao
- Department of Pain, Henan Provincial People's Hospital, Zhengzhou 450003, China
| | - S H Ma
- Department of Pain, Henan Provincial People's Hospital, Zhengzhou 450003, China
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Li HQ, Jiang YH, Liu L, Xing XF, Wang J, Ma SH, Xia LJ. [Efficacy and safety of high-voltage pulsed radiofrequency combined with pregabalin on severe thoracic postherpetic neuralgia]. Zhonghua Yi Xue Za Zhi 2023; 103:2440-2444. [PMID: 37599219 DOI: 10.3760/cma.j.cn112137-20230113-00077] [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: 08/22/2023]
Abstract
Objective: To investigate the efficacy and safety of high-voltage pulse radiofrequency combined with pregabalin on severe thoracic postherpetic neuralgia (PHN). Methods: A total of 103 patients with PHN who were admitted to the Department of Pain Medicine of Henan Provincial People's Hospital from May 2020 to May 2022 were retrospectively selected, including 50 males and 53 females, and aged 40 to 79 (65.4±9.2) years. The patients were divided into two groups according to the treatment methods they received: the control group (n=51) and the study group (n=52). The patients in the control group were treated with oral pregabalin, and the patients in the study group received pregabalin plus high-voltage pulse radiofrequency therapy. The pain intensity and efficacy of the two groups were evaluated before treatment and 4 weeks after treatment. The pain intensity, the sleep quality and the efficacy of treatment was evaluated by visual analogue scale (VAS) score, Pittsburgh Sleep Quality Index (PSQI) score and nimodipine method, respectively. The levels of pain mediators including serum neuropeptide Y (NPY), prostaglandin E2 (PGE2), substance P (SP) and β-endorphin were measured. The differences of the above indicators and the incidence of adverse reactions were compared between the two groups. Results: The VAS scores of the study group and the control group before treatment were 7.94±0.76 and 8.20±0.81, and PSQI scores were 16.84±3.90 and 16.29±3.84, respectively, with no statistically significant differences (both P>0.05). After 4 weeks of treatment, the VAS scores of the two groups were 2.84±0.80 and 3.35±0.87, and PSQI scores were 6.78±1.90 and 7.98±2.40, respectively, and the VAS score and PSQI score in the study group were lower than those in the control group (both P<0.05). There were no significant differences of the serum levels of NPY, PGE2, SP and β-endorphin before treatment in the study group and control group (all P>0.05). After 4 weeks of treatment, the levels of NPY, PGE2, SP and β-Endorphin in the study group were (240.7±26.8) ng/L, (74.4±8.6) μg/L, (108.9±15.7) ng/L and (4.4±0.9) ng/L, which were lower than those in the control group [(268.1±29.4) ng/L, (79.7±8.3) μg/L, (115.2±16.2) ng/L, (5.2±1.3) ng/L, respectively], with statistically significant differences (all P<0.05). After treatment, 29 cases were cured, 16 cases were markedly effective and 6 cases were effective in the study group, while 16 cases, 24 cases and 8 cases were cured, markedly effective and effective in the control group, respectively. The overall efficacy of patients in the study group was better than that in the control group (Z=-2.32, P=0.018). The incidence of adverse reactions in the study group and control group was 11.5% (6/52) and 7.8% (4/51), respectively, with no statistically significant difference (χ2=0.40, P=0.527). Conclusion: High-voltage pulse radiofrequency combined with pregabalin can significantly improve the pain intensity and sleep quality of patients with severe thoracic PHN and reduce the levels of pain mediators, with a high safety profile.
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Affiliation(s)
- H Q Li
- Department of Pain Medicine, Henan Provincial People's Hospital, Zhengzhou 450003, China
| | - Y H Jiang
- Department of Pain Medicine, Henan Provincial People's Hospital, Zhengzhou 450003, China
| | - L Liu
- Department of Pain Medicine, Henan Provincial People's Hospital, Zhengzhou 450003, China
| | - X F Xing
- Department of Pain Medicine, Henan Provincial People's Hospital, Zhengzhou 450003, China
| | - J Wang
- Department of Pain Medicine, Henan Provincial People's Hospital, Zhengzhou 450003, China
| | - S H Ma
- Department of Pain Medicine, Henan Provincial People's Hospital, Zhengzhou 450003, China
| | - L J Xia
- Department of Pain Medicine, Henan Provincial People's Hospital, Zhengzhou 450003, China
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Liu XY, Shen L, Dai XY, Jin W, Yan F, Jiang YH, Wang B, Xu F, Liu QB, Yao L. [Chest hemorrhage after left total pulmonary resection for secondary rifampin-resistant tuberculosis:a case report]. Zhonghua Jie He He Hu Xi Za Zhi 2023; 46:806-810. [PMID: 37536991 DOI: 10.3760/cma.j.cn112147-20230516-00241] [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: 08/05/2023]
Abstract
The patient had received five courses of anti-tuberculosis treatment for recurrent tuberculosis. The drug sensitivity test results of the first three courses showed drug-sensitive pulmonary tuberculosis, and the fourth diagnosis was rifampin-resistant tuberculosis (RR-TB), complicated by chronic obstructive pulmonary disease, type Ⅱ respiratory failure, pulmonary heart disease, and heart failure (grade Ⅲ). The patient stopped taking the anti-tuberculosis drugs on his own in the eighth month of receiving the resistant treatment. After admission, the symptoms improved temporarily after receiving oxygen therapy, anti-infection, and anti-tuberculosis treatment. Because of hemoptysis, the patient underwent arterial embolization by catheterization, but a large amount of hemoptysis occurred shortly thereafter. Emergency left total lung resection and gauze packing for hemostasis were performed. After surgery, the patient's vital signs were maintained with mechanical ventilation and vasopressors. Forty-eight hours after surgery, the gauze was removed, and the patient underwent tracheotomy, enteral nutrition, and anti-tuberculosis treatment. After discharge, the patient underwent rehabilitative exercise and anti-resistant tuberculosis therapy. The patient's condition remained stable for more than six months of follow-up.
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Affiliation(s)
- X Y Liu
- Department of Thoracic Surgery, Wuhan Pulmonary Hospital, Wuhan 430030, China
| | - L Shen
- Department of Thoracic Surgery, Wuhan Pulmonary Hospital, Wuhan 430030, China
| | - X Y Dai
- Department of Thoracic Surgery, Wuhan Pulmonary Hospital, Wuhan 430030, China
| | - W Jin
- Tuberculosis Ⅳ Ward, Wuhan Pulmonary Hospital, Wuhan 430030, China
| | - F Yan
- Department of Anesthesiology, Wuhan Pulmonary Hospital, Wuhan 430030, China
| | - Y H Jiang
- Department of Thoracic Surgery, Wuhan Pulmonary Hospital, Wuhan 430030, China
| | - B Wang
- Department of Thoracic Surgery, Wuhan Pulmonary Hospital, Wuhan 430030, China
| | - F Xu
- Department of Thoracic Surgery, Wuhan Pulmonary Hospital, Wuhan 430030, China
| | - Q B Liu
- Department of Thoracic Surgery, Wuhan Pulmonary Hospital, Wuhan 430030, China
| | - L Yao
- Department of Thoracic Surgery, Wuhan Pulmonary Hospital, Wuhan 430030, China
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Li HQ, Jiang YH, Liu L, Xing XF, Wang J, Ma SH, Xia LJ. [Efficacy and safety of high-voltage pulsed radiofrequency combined with pregabalin on severe thoracic postherpetic neuralgia]. Zhonghua Yi Xue Za Zhi 2023; 103:1931-1935. [PMID: 37402675 DOI: 10.3760/cma.j.cn112137-20221117-02418] [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: 07/06/2023]
Abstract
Objective: To investigate the efficacy and safety of high-voltage pulse radiofrequency combined with pregabalin on severe thoracic postherpetic neuralgia (PHN). Methods: A total of 103 patients with PHN who were admitted to the Department of Pain Medicine of Henan Provincial People's Hospital from May 2020 to May 2022 were retrospectively selected, including 50 males and 53 females, and aged 40 to 79 (65.4±9.2) years. The patients were divided into two groups according to the treatment methods they received: the control group (n=51) and the study group (n=52). The patients in the control group were treated with oral pregabalin, and the patients in the study group received pregabalin plus high-voltage pulse radiofrequency therapy. The pain intensity and efficacy of the two groups were evaluated before treatment and 4 weeks after treatment. The pain intensity, the sleep quality and the efficacy of treatment was evaluated by visual analogue scale (VAS) score, Pittsburgh Sleep Quality Index (PSQI) score and nimodipine method, respectively. The levels of pain factors including serum neuropeptide Y (NPY), prostaglandin E2 (PGE2), substance P (SP) and β-Endorphin were measured. The differences of the above indicators and the incidence of adverse reactions were compared between the two groups. Results: The VAS scores and PSQI scores of the study group and the control group before treatment were (7.94±0.76), (8.20±0.81), (16.84±3.90) and (16.29±3.84), respectively, with no statistically significant difference (both P>0.05). After 4 weeks of treatment, the VAS scores and PSQI scores of the two groups were (2.84±0.80), (3.35±0.87), (6.78±1.90) and (7.98±2.40), respectively, and the VAS score and PSQI score in the study group were lower than those in the control group (both P<0.05). Serum levels of NPY, PGE2, SP and β-Endorphin were (298.5±31.0) ng/L, (92.3±11.0) μg/L, (156.8±21.4) ng/L, and (8.6±1.6) ng/L in the study group and (304.2±28.6) ng/L, (94.4±12.9) μg/L, (152.7±23.8) ng/L and (8.2±1.8) ng/L in the control group, with no significant differences (all P>0.05). After 4 weeks of treatment, levels of NPY, PGE2, SP and β-Endorphin were (240.7±26.8) ng/L, (74.4±8.6) μg/L, (108.9±15.7) ng/L and (4.4±0.9) ng/L, which were lower than those in the control group [(268.1±29.4) ng/L, (79.7±8.3) μg/L, (115.2±16.2) ng/L, (5.2±1.3) ng/L, respectively], with statistically significant differences (all P<0.05). After treatment, 29 cases were cured, 16 cases were markedly effective and 6 cases were effective in the study group, while 16 cases, 24 cases and 8 cases were cured, markedly effective and effective in the control group. The overall efficacy of patients in the study group was better than that in the control group (Z=-2.32, P=0.018). The incidence of adverse reactions in the study group and control group was 11.5% (6/52) and 7.8% (4/51), respectively, with no statistically significant difference (χ2=0.40, P=0.527). Conclusion: High-voltage pulse radiofrequency combined with pregabalin can significantly improve the pain and sleep quality of patients with severe thoracic PHN and reduce the level of pain factors, with a high safety profile.
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Affiliation(s)
- H Q Li
- Department of Pain Medicine, Henan Provincial People's Hospital, Zhengzhou 450003, China
| | - Y H Jiang
- Department of Pain Medicine, Henan Provincial People's Hospital, Zhengzhou 450003, China
| | - L Liu
- Department of Pain Medicine, Henan Provincial People's Hospital, Zhengzhou 450003, China
| | - X F Xing
- Department of Pain Medicine, Henan Provincial People's Hospital, Zhengzhou 450003, China
| | - J Wang
- Department of Pain Medicine, Henan Provincial People's Hospital, Zhengzhou 450003, China
| | - S H Ma
- Department of Pain Medicine, Henan Provincial People's Hospital, Zhengzhou 450003, China
| | - L J Xia
- Department of Pain Medicine, Henan Provincial People's Hospital, Zhengzhou 450003, China
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Jiang YH, Shen L, Liu QB, Dai XY, Sheng J, Liu XY. [Evaluation of uniportal video-assisted thoracoscopic decortication in treatment of drug-resistant tuberculous empyema]. Zhonghua Wai Ke Za Zhi 2023; 61:156-161. [PMID: 36720626 DOI: 10.3760/cma.j.cn112139-20220519-00231] [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: 02/02/2023]
Abstract
Objective: To examine the safety and efficacy of the uniportal video-assisted thoracoscopic decortication in treatment of drug-resistant tuberculosis empyema. Methods: From January 2018 to December 2020, 122 cases of tuberculous empyema treated by decortication in Department of Surgery, Wuhan Pulmonary Hospital were retrospectively analyzed, including 100 males and 22 females, aged(M(IQR)) 29.5(28.0) years (range: 13 to 70 years). According to the surgical approach and drug resistance, patients with drug-resistant tuberculosis who underwent uniportal video-assisted thoracoscopic decortication were included in group A (n=22), and those who underwent thoracotomy decortication were included in group B (n=28). Drug-sensitive patients who underwent uniportal video-assisted thoracoscopic decortication were included in group C (n=72). There was no statistical difference in the baseline data of the three groups (P>0.05). The operation, early postoperative recovery, and prognosis-related indicators were compared among three groups by Kruskal-Wallis test and χ2 test by Mann-Whitney U test and Bonferroni method between groups A and B, groups A and C. Results: The intraoperative blood loss of group A, group B, and group C was 200(475) ml, 300(200) ml, and 225(300) ml, respectively. There was no significant difference in intraoperative hemorrhage (H=2.74, P=0.254) and treatment outcome (χ2=4.76, P=0.575) among the three groups. Compared with group B, the operation time of group A (302.5(187.5) minutes vs. 200.0(60.0) minutes, U=171.0, P=0.007) and postoperative pulmonary reexpansion duration (4.5(3.0) months vs. 3.0 (2.2) months, U=146.5, P=0.032) were longer, and the postoperative drainage duration (9.5(7.8) days vs. 13.0(10.0) days, U=410.0, P=0.044), and the postoperative hospitalization time (12.0(7.8) days vs. 14.5(4.8) days, U=462.2, P=0.020) were shorter. There was no significant difference in complications between group A and group B (63.6%(14/22) vs. 71.4%(20/28), χ2=0.34, P=0.558). Compared with group C, the postoperative drainage duration of group A (9.5(7.8) days vs. 7.0(4.0) days, U=543.5, P=0.031), the postoperative hospitalization time (12.0(7.8) days vs. 9.0(4.0) days, U=533.0, P=0.031) and postoperative pulmonary reexpansion duration (4.5(3.0) months vs. 3.0(2.0) months, U=961.5, P=0.001) were longer. The operation time (302.5(187.5) minutes vs. 242.5(188.8) minutes, U=670.5, P=0.278), and complications (63.6%(14/22) vs. 40.3%(29/72), χ2=3.70, P=0.054) were not different between group A and group C. Conclusions: For drug-resistant tuberculous empyema, the uniportal video-assisted thoracoscopic decortication can achieve the same good therapeutic effect as drug-sensitive tuberculous empyema, and it is as safe as thoracotomy. At the same time, it has the advantage of minimally invasive and can accelerate the early postoperative recovery of patients.
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Affiliation(s)
- Y H Jiang
- Department of Surgery, Wuhan Pulmonary Hospital, Wuhan Institute for Tuberculosis Control, Wuhan 430030, China
| | - L Shen
- Department of Surgery, Wuhan Pulmonary Hospital, Wuhan Institute for Tuberculosis Control, Wuhan 430030, China
| | - Q B Liu
- Department of Surgery, Wuhan Pulmonary Hospital, Wuhan Institute for Tuberculosis Control, Wuhan 430030, China
| | - X Y Dai
- Department of Surgery, Wuhan Pulmonary Hospital, Wuhan Institute for Tuberculosis Control, Wuhan 430030, China
| | - J Sheng
- Department of Surgery, Wuhan Pulmonary Hospital, Wuhan Institute for Tuberculosis Control, Wuhan 430030, China
| | - X Y Liu
- Department of Surgery, Wuhan Pulmonary Hospital, Wuhan Institute for Tuberculosis Control, Wuhan 430030, China
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Liu XX, Wang MJ, Kan QN, Li C, Xiao Z, Jiang YH, Li W, Li X, Jiang ZY. Kukoamine A Improves Mycoplasma pneumoniae Pneumonia by Regulating miR-222-3p/Superoxide Dismutase 2. Biomed Res Int 2022; 2022:2064013. [PMID: 35774277 PMCID: PMC9239828 DOI: 10.1155/2022/2064013] [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] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 05/13/2022] [Accepted: 06/02/2022] [Indexed: 11/21/2022]
Abstract
Mycoplasma pneumoniae pneumonia (MPP) represents a common respiratory disease in children patients. Kukoamine A (KuA) is a spermine alkaloid found in the Chinese herb Cortex Lycii radices, which has a variety of pharmacological properties. However, no study has been reported on the role of KuA in MPP. Exosomes, a type of lipid bilayer-enclosed extracellular vesicles, can be delivered to the target cells, where they regulate function and physiology. With the use of human alveolar basal epithelial cells (HABECs) as an in vitro model, in this study, we sought to characterize the changes in levels of superoxide dismutase 2 (SOD2) and proinflammatory cytokines including IL-6 and TNF-α in HABECs in response to exosomes, which were isolated from peripheral blood serum of MPP patients. We found that, compared to normal, MPP patients exhibited a significant up-regulated miR-222-3p. Further, exosomal miR-222-3p downregulated SOD2 activity but promoted nuclear NF-κB activity and expression of IL-6 and TNF-α in HABECs, ultimately leading to an oxidative stress condition. Interestingly, such stimulating effects were attenuated by the pretreatment of KuA. This study suggests a critical role possessed by KuA in MPP by regulating the miR-222-3p/SOD2 axis, which represents a promising strategy for the treatment of MPP.
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Affiliation(s)
- Xiu-Xiu Liu
- Department of Pediatrics, Longhua Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Ming-Jing Wang
- Department of Pediatrics, Longhua Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Qian-Na Kan
- Department of Pediatrics, Longhua Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Cui Li
- Institute of Respiratory Diseases, Longhua Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Zhen Xiao
- Department of Pediatrics, Longhua Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Yong-Hong Jiang
- Department of Pediatrics, Longhua Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Wen Li
- Department of Pediatrics, Longhua Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Xiao Li
- Department of Pediatrics, Longhua Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Zhi-Yan Jiang
- Department of Pediatrics, Longhua Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
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Yang W, Li HY, Wu YF, Mi RJ, Liu WZ, Shen X, Lu YX, Jiang YH, Ma MJ, Shen HY. ac4C acetylation of RUNX2 catalyzed by NAT10 spurs osteogenesis of BMSCs and prevents ovariectomy-induced bone loss. Mol Ther Nucleic Acids 2021; 26:135-147. [PMID: 34513300 PMCID: PMC8413676 DOI: 10.1016/j.omtn.2021.06.022] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [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: 11/02/2020] [Accepted: 06/25/2021] [Indexed: 12/16/2022]
Abstract
N-acetyltransferase 10 (NAT10) is the key enzyme for N4-acetylcytidine (ac4C) modification of mRNA, which participates in various cellular processes and is related to many diseases. Here, we explore the relationships among osteoblast differentiation, NAT10, and ac4C, and we found that NAT0 expression and the ac4C level of total RNA were decreased in the bone tissues of bilateral ovariectomized (OVX) mice and osteoporosis patients. Adenoviruses overexpressing NAT10 reversed bone loss, and Remodelin, an NAT10 inhibitor, enhanced the loss of bone mass in OVX mice. Moreover, bone marrow-derived mesenchymal stem cells (BMSCs) with low-level ac4C modification formed fewer calcium nodules in vitro with NAT10 silencing, whereas BMSCs with high-level ac4C modification formed more calcium nodules with NAT10 overexpression. Moreover, we demonstrated that the ac4C level of runt-related transcription factor 2 (RUNX2) mRNA was increased after BMSCs were cultured in osteogenic medium (OM) and decreased after NAT10 silencing. The RUNX2 mRNA half-life and protein expression decreased after silencing NAT10 in BMSCs. Therefore, NAT10-based ac4C modification promotes the osteogenic differentiation of BMSCs by regulating the RUNX2 ac4C level. Because abnormal levels of NAT10 are probably one of the mechanisms responsible for osteoporosis, NAT10 is a new potential therapeutic target for this disease.
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Affiliation(s)
- W Yang
- Department of Orthopedics, The Eighth Affiliated Hospital, Sun Yat-sen University, No. 3025, Shennan Middle Road, Futian District, Shenzhen, Guangdong 518033, People's Republic of China
| | - H Y Li
- Department of Orthopedics, The Eighth Affiliated Hospital, Sun Yat-sen University, No. 3025, Shennan Middle Road, Futian District, Shenzhen, Guangdong 518033, People's Republic of China
| | - Y F Wu
- Center for Biotherapy, The Eighth Affiliated Hospital, Sun Yat-sen University, Shenzhen 518033, People's Republic of China
| | - R J Mi
- Center for Biotherapy, The Eighth Affiliated Hospital, Sun Yat-sen University, Shenzhen 518033, People's Republic of China
| | - W Z Liu
- Department of Orthopedics, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, People's Republic of China
| | - X Shen
- Department of Orthopedics, The Eighth Affiliated Hospital, Sun Yat-sen University, No. 3025, Shennan Middle Road, Futian District, Shenzhen, Guangdong 518033, People's Republic of China
| | - Y X Lu
- Center for Biotherapy, The Eighth Affiliated Hospital, Sun Yat-sen University, Shenzhen 518033, People's Republic of China
| | - Y H Jiang
- Department of Orthopedics, The Eighth Affiliated Hospital, Sun Yat-sen University, No. 3025, Shennan Middle Road, Futian District, Shenzhen, Guangdong 518033, People's Republic of China
| | - M J Ma
- Department of Orthopedics, The Eighth Affiliated Hospital, Sun Yat-sen University, No. 3025, Shennan Middle Road, Futian District, Shenzhen, Guangdong 518033, People's Republic of China
| | - H Y Shen
- Department of Orthopedics, The Eighth Affiliated Hospital, Sun Yat-sen University, No. 3025, Shennan Middle Road, Futian District, Shenzhen, Guangdong 518033, People's Republic of China.,Department of Orthopedics, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, People's Republic of China
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Wang Z, Chen YW, Jiang YH, Sun LP, Chen XJ, Tao HL, Dong JZ. [Electrophysiological characteristics and therapeutic efficacy of radiofrequency ablation of focal atrial tachycardia originating from the right atrial appendage during pregnancy]. Zhonghua Xin Xue Guan Bing Za Zhi 2020; 48:859-865. [PMID: 33076624 DOI: 10.3760/cma.j.cn112148-20191104-00683] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To analyze the electrophysiological characteristics and the therapeutic efficacy of irrigated-tip catheter radiofrequency ablation(RFA) without radiation for pregnant women with focal atrial tachycardia(AT) originating from the right atrial appendage (RAA). Methods: Data from 55 women with focal AT, who underwent radiofrequency ablation (RFA) in the First Affiliated Hospital of Zhengzhou University from October 2016 to March 2019, were screened. 2 non-pregnant women with right atrial appendage tachycardia (RAAT) and 4 pregnant women with non-RAAT were excluded. The remaining 49 cases were divided into RAAT during pregnancy group (n=6, including 4 cases of tachycardia-induced cardiomyopathy) and non-pregnant and non-RAAT group (control, n=43). Under the guidance of three-dimensional mapping system, the earliest activation site was identified, RFA with the irrigated catheter without x-ray fluoroscopy was performed in RAAT patients during pregnancy, all patients in control group underwent non-zero-ray ablation. Patients were followed up at 3, 6, 12 months post procedure, and yearly follow up thereafter in outpatient clinic. Electrocardiogram or Holter monitoring was performed during follow up. AT recurrence and surgical complications were recorded during follow up. At 6 months after RFA, echocardiography examination and laboratory examination including N-terminal B-type brain natriuretic peptide measurement were performed in the pregnant patients, delivery results were also recorded in the pregnant patients. The electrophysiological characteristics of RAAT during pregnancy were analyzed, the therapeutic efficacy of RFA was compared between the two groups. Results: This study is a retrospective study. Age ((30.7±6.2)years vs. (57.2±11.7)years), left ventricular ejection fraction ((46.0±12.8)% vs. (60.1±5.9)%), proportions of organic heart disease (0% vs. 58%) were significantly lower in the RAAT patients during pregnancy group than in control group (P<0.05), while proportions of patients with persistent tachycardia (100% vs. 7%), symptoms of chest distress and palpitation (6/6 vs. 49%) and left ventricular ejection farction≤50% (4/6 vs. 9%) were significantly higher in RAAT group than in control group (P<0.05), heart rate was similar between the two groups ((163.7±11.1)beats/minutes vs. (153.7±15.2)beats/minutes, P>0.05). The characteristic P-wave morphology was observed in RAAT patients during pregnancy, i.e, P wave was mostly upright (5/6) in inferior-leads (Ⅱ, Ⅲ, aVF) and in lead I and aVL, deep and wide negative P wave was found in V1 lead (5/6), and gradually became positive from V2-V6. The mean tachycardia cycle length was (361.7±38.5) ms. Three-dimensional mapping showed that the origin points of the 6 RAAT pregnant patients were all scattered in the local region, the local region was ablated accordingly, 2 patients (2/6) received extensive ablation of local areas. Immediate successful rate was similar between the two groups (6/6 vs. 93%). During follow up ((15.3±4.0) months), no complications were observed after RFA, postoperative recurrence rate was similar (1/6 vs. 12%). Uncomplicated delivery was reported in all 6 pregnant RAAT post ablation. Normal cardiac structure and function was observed in the 4 pregnant patients with tachycardia-induced cardiomyopathy post ablation. Compared to pre-ablation phase, reduced left atrial dimension ((30.3±1.3) mm vs. (36.8±6.7) mm, P>0.05), increased left ventricular ejection fraction ((64.0±2.9)% vs. (39.8±10.7)%), reduced left ventricular end-diastolic dimension ((44.8±4.0) mm vs. (60.0±2.9) mm) and reduced N-terminal B-type natriuretic peptide value ((136.2±47.5) ng/L vs. (3 408.4±901.3) ng/L) were observed at 6 months post ablation (P<0.05). Conclusion: The electrophysiological characteristics are suggestive for focal AT originating from RAA during pregnancy. Under the guidance of 3-dimension activation mapping, no fluoroscopic RFA with irrigated-tip catheter is a safe and effective strategy for the treatment of focal RAAT during pregnancy.
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Affiliation(s)
- Z Wang
- Department of Cardiology, First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Y W Chen
- Department of Cardiology, First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Y H Jiang
- Department of Cardiology, First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - L P Sun
- Department of Cardiology, First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - X J Chen
- Department of Cardiology, First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - H L Tao
- Department of Cardiology, First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - J Z Dong
- Department of Cardiology, First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
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Zhang K, Zhang Y, Wang X, Shen Z, Yan TM, Jiang YH. Experimental evidence for terahertz emission of continuum electrons in the dual-color laser field. Opt Lett 2020; 45:1838-1841. [PMID: 32236012 DOI: 10.1364/ol.387669] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Accepted: 02/22/2020] [Indexed: 06/11/2023]
Abstract
Terahertz (THz) wave generation (TWG) in a dual-color laser is investigated with joint measurements between THz and third-harmonic generation, where the relative phase delay of dual-color fields is determined in situ in sub-wavelength accuracy, allowing for the clarification of the TWG mechanism in a direct comparison with various theoretical predictions. The delay- and polarization-dependent experiment validates that the continuum-continuum transition within the escaped electron wavepacket in the single atom gives birth to THz emission, while the bound energetic level does not contribute to TWG. TWG from atoms and molecules would provide an all-optical, vacuum-free, and ultrafast tool to record the spatiotemporal evolution of tunneling electron wavepackets.
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11
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Jiang YH, Jiao Y, Chen GY, Sheng JH, Xu QX. [Parotid mucoepidermoid carcinoma after treatment for acute lymphoblastic leukemia in children]. Zhonghua Er Ke Za Zhi 2019; 57:483-484. [PMID: 31216808 DOI: 10.3760/cma.j.issn.0578-1310.2019.06.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Y H Jiang
- Clinical Laboratory, the Tumor Hospital of Zhengzhou University, Zhengzhou 450008, China
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Shi CY, Mamal ZH, Liu XX, Wu LH, Xia DN, Nie YR, Lai FQ, Duan HW, Xiao ZJ, Jiang YH, Li Y, Xiao Y. [Risk-factor analysis of poor graft function after allogeneic hematopoietic stem cell transplantation for severe aplastic anemia]. Zhonghua Xue Ye Xue Za Zhi 2019; 38:761-766. [PMID: 29081192 PMCID: PMC7348355 DOI: 10.3760/cma.j.issn.0253-2727.2017.09.006] [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] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
目的 探讨重型再生障碍性贫血(SAA)患者行异基因造血干细胞移植(allo-HSCT)后发生植入功能不良(PGF)的危险因素。 方法 回顾性分析111例行allo-HSCT的SAA患者临床资料及移植情况,采用Cox比例风险模型对可能影响PGF的因素进行单因素及多因素分析。 结果 在111例行allo-HSCT的SAA患者中,共有16例发生了PGF(14.4%)。多因素分析结果显示,非血缘供者(HR=2.656,95%CI 1.204~5.858,P=0.016)及移植前血清铁蛋白浓度(SF)>1 000 µg/L(HR=3.170,95%CI 1.400~7.180,P=0.006)是发生PGF的独立危险因素。 结论 非血缘供者及移植前SF>1 000 µg/L的患者移植后容易发生PGF。
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Affiliation(s)
- C Y Shi
- Department of Hematology, General Hospital of Guangzhou Military Command of PLA, Southern Medical University, Guangzhou 510015, China
| | | | | | | | | | | | | | | | | | | | | | - Yang Xiao
- Department of Hematology, General Hospital of Guangzhou Military Command of PLA, Southern Medical University, Guangzhou 510015, China
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Zhang Y, Yan TM, Jiang YH. Ultrafast Mapping of Coherent Dynamics and Density Matrix Reconstruction in a Terahertz-Assisted Laser Field. Phys Rev Lett 2018; 121:113201. [PMID: 30265110 DOI: 10.1103/physrevlett.121.113201] [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] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 07/19/2018] [Indexed: 06/08/2023]
Abstract
A time-resolved spectroscopic protocol exploiting terahertz-assisted photoionization is proposed to reconstruct transient density matrix. Population and coherence elements are effectively mapped onto spectrally separated peaks in photoionization spectra. The beatings of coherence dynamics can be temporally resolved beyond the pulse duration, and the relative phase between involved states is directly readable from the oscillatory spectral distribution. As demonstrated by a photoexcited multilevel open quantum system, the method shows potential applications for subfemtosecond time-resolved measurements of coherent dynamics with free electron lasers and tabletop laser fields.
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Affiliation(s)
- Yizhu Zhang
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
- Center for Terahertz waves and College of Precision Instrument and Optoelectronics Engineering, Key Laboratory of Opto-electronics Information and Technical Science, Ministry of Education, Tianjin University, China
| | - Tian-Min Yan
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
| | - Y H Jiang
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- ShanghaiTech University, Shanghai 201210, China
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14
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Li K, Zhang Y, Wang L, Duanmu YY, Tian W, Chen H, Yin L, Bo J, Wang Y, Li W, He L, Zhao WH, Xu SQ, Zhao LF, Zhou J, Wang FZ, Liu Y, Zhu L, Chen YZ, Zhang XL, Hao XG, Shi ZW, Wang JY, Shao JM, Chen ZJ, Lei RS, Ning G, Zhao Q, Jiang YH, Zhi YH, Li BQ, Chen X, Xiang QY, Wang L, Ma YZ, Liu SW, Cheng XG. The protocol for the Prospective Urban Rural Epidemiology China Action on Spine and Hip status study. Quant Imaging Med Surg 2018; 8:667-672. [PMID: 30211034 DOI: 10.21037/qims.2018.08.07] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The Prospective Urban Rural Epidemiology (PURE) China Action on Spine and Hip status (CASH) study focused on the prevalence of osteoporosis and spinal fracture in China. The aim of the PURE CASH study is to determine the prevalence of osteoporosis and spinal fracture, and explore the potential relationship between spinal fracture and bone mineral density (BMD). This study is a prospective large-scale population study with a community-based sampling and recruitment strategy. The aim is to determine the prevalence of osteoporosis and vertebral fracture in this population, to evaluate the association between vertebral fractures and BMD values, and to assess the prediction power of BMD for incident fractures. Participants in the PURE CASH study are all from the PURE study in China, recruited from 12 centers in 7 Chinese provinces. The inclusion criteria are that participants should be aged more than 40 years and able to give informed consent. Exclusion criteria are pregnant women, individuals with metal implants in the lumbar spine, use of medications or the existence of any disease or condition known to have a major influence on BMD, and inability to give informed consent. A total of 3,457 participants undergo a quantitative computed tomography (QCT) scan of the upper abdomen. The scanning parameters are as follows: 120 kVp at all centers, mAs between 75 and 200, FOV 40 cm×40 cm. The BMD values of L1 to L3 are measured, and the average BMD calculated. The American College of Radiology QCT criteria for the diagnosis of osteoporosis is applied to determine the presence of osteoporosis. The scout view images of T4-L4 vertebrae are reviewed by two experienced radiologists for semi-quantification of vertebral fractures according to Genant's method.
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Affiliation(s)
- Kai Li
- Department of Radiology, Beijing Jishuitan Hospital, Beijing 100035, China
| | - Yong Zhang
- Department of Radiology, Beijing Jishuitan Hospital, Beijing 100035, China
| | - Ling Wang
- Department of Radiology, Beijing Jishuitan Hospital, Beijing 100035, China
| | - Yang-Yang Duanmu
- Department of Radiology, Beijing Jishuitan Hospital, Beijing 100035, China
| | - Wei Tian
- Department of Spine Surgery, Beijing Jishuitan Hospital, Beijing 100035, China
| | - Hui Chen
- Medical Research & Biometrics Center, National Center for Cardiovascular Disease, Beijing 102300, China
| | - Lu Yin
- Medical Research & Biometrics Center, National Center for Cardiovascular Disease, Beijing 102300, China
| | - Jian Bo
- Medical Research & Biometrics Center, National Center for Cardiovascular Disease, Beijing 102300, China
| | - Yang Wang
- Medical Research & Biometrics Center, National Center for Cardiovascular Disease, Beijing 102300, China
| | - Wei Li
- Medical Research & Biometrics Center, National Center for Cardiovascular Disease, Beijing 102300, China
| | - Li He
- National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - Wen-Hua Zhao
- National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - Shao-Qi Xu
- Department of Radiology, Nanjing University of Chinese Medicine Affiliated Wujin Hospital of Traditional Chinese Medicine, Changzhou 213161, China
| | - Lin-Fen Zhao
- Department of Radiology, Nanjing University of Chinese Medicine Affiliated Wujin Hospital of Traditional Chinese Medicine, Changzhou 213161, China
| | - Jun Zhou
- Department of Radiology, the 4th People's Hospital of Shenyang, Shenyang 110031, China
| | - Feng-Zhe Wang
- Department of Radiology, the 4th People's Hospital of Shenyang, Shenyang 110031, China
| | - Yu Liu
- Department of Prevention and Healthcare, Shenyang No. 242 Hospital, Shenyang 110034, China
| | - Lei Zhu
- Department of Radiology, the People's Hospital of Dayi County, Chengdu 611330, China
| | - Yi-Zhong Chen
- Department of Radiology, the People's Hospital of Dayi County, Chengdu 611330, China
| | - Xiao-Lin Zhang
- Department of Prevention and Healthcare, Dayi County Public Health Hospital, Chengdu 611330, China
| | - Xiao-Guang Hao
- Department of Radiology, Taiyuan Central Hospital, Taiyuan 030009, China
| | - Zhi-Wei Shi
- Department of Radiology, Taiyuan Central Hospital, Taiyuan 030009, China
| | - Jun-Ying Wang
- Balingqiao Community Health Service Center, Taiyuan 030013, China
| | - Ji-Man Shao
- Department of Radiology, the Affiliated Hospital of Jiangxi University of Traditional Chinese Medicine, Nanchang 330006, China
| | - Zhi-Jian Chen
- Department of Radiology, the Affiliated Hospital of Jiangxi University of Traditional Chinese Medicine, Nanchang 330006, China
| | - Ren-Sheng Lei
- Nanchang County Center for Disease Control & Prevention, Nanchang 330200, China
| | - Gang Ning
- Department of Radiology, West China Second University Hospital of Sichuan University, Chengdu 610041, China
| | - Qian Zhao
- General Practice Department, West China Hospital of Sichuan University, Chengdu 610041, China
| | - Yong-Hong Jiang
- Department of Radiology, Xi'an Honghui Hospital, Xi'an 710054, China
| | - Ya-Hong Zhi
- Department of Prevention and Healthcare, Hospital of Xidian University, Xi'an 710071, China
| | - Bao-Qing Li
- Department of Radiology, Beijing Shijingshan Hospital, Beijing 100043, China
| | - Xiao Chen
- Department of Radiology, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing 210029, China
| | - Quan-Yong Xiang
- Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210019, China
| | - Liang Wang
- Center of Orthopedics, the 309th Hospital of People's Liberation Army, Beijing 100091, China
| | - Yuan-Zheng Ma
- Center of Orthopedics, the 309th Hospital of People's Liberation Army, Beijing 100091, China
| | - Shi-Wei Liu
- National Center for Chronic and Noncommunicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - Xiao-Guang Cheng
- Department of Radiology, Beijing Jishuitan Hospital, Beijing 100035, China
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Couturier L, Nosske I, Hu F, Tan C, Qiao C, Jiang YH, Chen P, Weidemüller M. Laser frequency stabilization using a commercial wavelength meter. Rev Sci Instrum 2018; 89:043103. [PMID: 29716314 DOI: 10.1063/1.5025537] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We present the characterization of a laser frequency stabilization scheme using a state-of-the-art wavelength meter based on solid Fizeau interferometers. For a frequency-doubled Ti-sapphire laser operated at 461 nm, an absolute Allan deviation below 10-9 with a standard deviation of 1 MHz over 10 h is achieved. Using this laser for cooling and trapping of strontium atoms, the wavemeter scheme provides excellent stability in single-channel operation. Multi-channel operation with a multimode fiber switch results in fluctuations of the atomic fluorescence correlated to residual frequency excursions of the laser. The wavemeter-based frequency stabilization scheme can be applied to a wide range of atoms and molecules for laser spectroscopy, cooling, and trapping.
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Affiliation(s)
- Luc Couturier
- Hefei National Laboratory for Physical Sciences at the Microscale and Shanghai Branch, University of Science and Technology of China, Shanghai 201315, China
| | - Ingo Nosske
- Hefei National Laboratory for Physical Sciences at the Microscale and Shanghai Branch, University of Science and Technology of China, Shanghai 201315, China
| | - Fachao Hu
- Hefei National Laboratory for Physical Sciences at the Microscale and Shanghai Branch, University of Science and Technology of China, Shanghai 201315, China
| | - Canzhu Tan
- Hefei National Laboratory for Physical Sciences at the Microscale and Shanghai Branch, University of Science and Technology of China, Shanghai 201315, China
| | - Chang Qiao
- Hefei National Laboratory for Physical Sciences at the Microscale and Shanghai Branch, University of Science and Technology of China, Shanghai 201315, China
| | - Y H Jiang
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
| | - Peng Chen
- Hefei National Laboratory for Physical Sciences at the Microscale and Shanghai Branch, University of Science and Technology of China, Shanghai 201315, China
| | - Matthias Weidemüller
- Hefei National Laboratory for Physical Sciences at the Microscale and Shanghai Branch, University of Science and Technology of China, Shanghai 201315, China
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Jiang YH, You KY, Bi ZF, Li LT, Mo HQ, Liu YM. [The relationship between the radioresistance of pancreatic cancer cell SW1990 and the induction of the Epithelial-Mesenchymal Transition: an in vitro study]. Zhonghua Yi Xue Za Zhi 2018; 98:939-943. [PMID: 29665670 DOI: 10.3760/cma.j.issn.0376-2491.2018.12.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the relationship between the radioresistance of pancreatic cancer cell SW1990 and the induction of the Epithelial-Mesenchymal Transition (EMT). Methods: The radio-resistant pancreatic cancer cell SW1990-R were established by using the method of radiating pancreatic cancer cell SW1990 step by step and repeatedly. Then the changes of the morphology of the cell was observed by inverted phase contrast microscope, the radioresistance of SW1990-R was detected by colony-forming assay, and the apoptosis rate of the two cell lines after radiation were measured by flow cytometry. Then invasiveness and EMT-related genes was measured by trans-well test and qRT-PCR. Finally, the model of transplanted tumor on nude mouse was used to confirm the relationship between the radioresistance of pancreatic cancer cell SW1990 and the induction of EMT. Results: Compared with SW1990, SW1990-R had a lower radiosensitivity (survival fraction in 2 Gy, SF2: 0.326 3±0.007 3 vs 0.840 8±0.001 9, P<0.05) and lower apoptosis rate[(6.12±1.27) % vs (16.87±1.73)%, P<0.05]. Meanwhile, the invasive ability of SW1990-R were significant higher than that of SW1990 cell. According to the result of both in vivo and in vitro experiment, SW1990-R had a higher expression level of Vimentin and Snail, and lower expression level of E-cadherin when compared with SW1990. Conclusion: Compared with SW1990, the radio-resistant pancreatic cancer cell SW1990-R can induce the Epithelial-mesenchymal transition.
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Affiliation(s)
- Y H Jiang
- Department of Radiotherapy, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
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Meng Q, Zhang Y, Yan TM, Jiang YH. Post-processing phase-correction algorithm in two-dimensional electronic spectroscopy. Opt Express 2017; 25:6644-6652. [PMID: 28381009 DOI: 10.1364/oe.25.006644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In a typical two-dimensional electronic spectroscopy (2DES) experiment, the timing errors of the coherence and emission time when determining the absolute time zeros usually introduce extraneous spectral phase slopes and distort the 2D spectrum. In this work, a phase-correction method that merely relies on the data post-processing algorithm is proposed. The method allows reconstructing the spectrum by simply subtracting the artificial linear spectral-phase slopes from the phase component of the 2D spectrum along both coherence and emission frequency axes. The new method has the advantages of ease of implementation and no need for the supplementary experiments and iterative fitting algorithm as commonly-used phasing methods, which may improve the phasing issue in 2DES and serve as a cross-check of now available phasing methods.
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Yu CC, Liu P, Huang DG, Jiang YH, Feng H, Hao DJ. A new cervical artificial disc prosthesis based on physiological curvature of end plate: a finite element analysis. Spine J 2016; 16:1384-1391. [PMID: 27345748 DOI: 10.1016/j.spinee.2016.06.019] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Revised: 04/28/2016] [Accepted: 06/21/2016] [Indexed: 02/03/2023]
Abstract
STUDY DESIGN The study aimed to build a new cervical artificial disc C3-C7 segment prosthesis, and perform a biomechanical comparison between the new prosthesis and the Prestige LP prosthesis using a three-dimensional non-linear finite element (FE) model. PURPOSE The study compared the biomechanical differences between the new cervical artificial disc prosthesis based on the physiological curvature of the end plate and the Prestige LP prosthesis after artificial disc replacement. BACKGROUND CONTEXT There has been no prior research on artificial disc prostheses based on the physiological curvature of the end plate; studies of biomechanical changes after cervical disc arthroplasty (CDR) are few. METHODS An FE model of the C3-C7 segments was developed and validated. A new cervical artificial disc prosthesis based on the physiological curvature of the end plate and the Prestige LP prosthesis were integrated at the C5-C6 segment into the validated FE model. All models were subjected to a follower load of 73.6 N and a 1 Nm in flexion-extension, lateral bending, and axial torsion. The segmental range of motion (ROM) and stress on the prostheses were analyzed. RESULTS The ROM in most segments after CDR with new cervical artificial disc prosthesis was more similar to that of the normal cervical spine than the Prestige LP prosthesis. However, there was no significant difference between the two prostheses. The stress on the new artificial disc was significantly less than that in the Prestige LP prosthesis. CONCLUSIONS There was no significant difference in ROM in all segments after CDR for the two prostheses. The stress on the new cervical artificial disc prosthesis based on the physiological curvature of the end plate was significantly less than that in the Prestige LP prosthesis. The new artificial disc prosthesis is feasible and effective, and can reduce the implant-bone interface stress on the end plate, which may be one of the causes of prosthesis subsidence.
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Affiliation(s)
- Cheng-Cheng Yu
- Department of Spine Surgery, Honghui Hospital, Xi'an Jiaotong University Health Science Center, No. 76 Nanguo Rd, Xi'an, Shaanxi 710054, China
| | - Peng Liu
- Department of Spine Surgery, Honghui Hospital, Xi'an Jiaotong University Health Science Center, No. 76 Nanguo Rd, Xi'an, Shaanxi 710054, China
| | - Da-Geng Huang
- Department of Spine Surgery, Honghui Hospital, Xi'an Jiaotong University Health Science Center, No. 76 Nanguo Rd, Xi'an, Shaanxi 710054, China
| | - Yong-Hong Jiang
- Department of Spine Surgery, Honghui Hospital, Xi'an Jiaotong University Health Science Center, No. 76 Nanguo Rd, Xi'an, Shaanxi 710054, China
| | - Hang Feng
- Department of Spine Surgery, Honghui Hospital, Xi'an Jiaotong University Health Science Center, No. 76 Nanguo Rd, Xi'an, Shaanxi 710054, China
| | - Ding-Jun Hao
- Department of Spine Surgery, Honghui Hospital, Xi'an Jiaotong University Health Science Center, No. 76 Nanguo Rd, Xi'an, Shaanxi 710054, China.
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Zhang Y, Yan TM, Jiang YH. Precise phase determination with the built-in spectral interferometry in two-dimensional electronic spectroscopy. Opt Lett 2016; 41:4134-4137. [PMID: 27607991 DOI: 10.1364/ol.41.004134] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A new method determining the precise phase of pulse sequences in two-dimensional electronic spectroscopy (2DES) is proposed merely using the already built-in spectral interferometry. The approach is easily implemented without the supplementary instrumental construction, only at the expense of a few additional scanning and data-fitting processes. This method is executed with the sample in place, effectively avoiding the phase ambiguities of the beam propagation in samples, thus calibrating the absolute phase at the exact interaction region. The new proposed method is expected to improve the phasing procedure in 2DES in a more convenient way.
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20
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Li YC, Li Z, Li ZW, Jiang YH, Weng BQ, Lin WX. Variations of rhizosphere bacterial communities in tea (Camellia sinensis L.) continuous cropping soil by high-throughput pyrosequencing approach. J Appl Microbiol 2016; 121:787-99. [PMID: 27377624 DOI: 10.1111/jam.13225] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2016] [Revised: 06/19/2016] [Accepted: 06/29/2016] [Indexed: 11/30/2022]
Abstract
AIMS The goal was to investigate the dynamics of soil bacterial community in the chronosequence tea orchards. METHOD AND RESULTS In this study, soils from tea orchards with continuously cropping histories for 1, 10 and 20 years were collected for investigating rhizosphere bacterial communities using 454 pyrosequencing. The results indicated that Gammaproteobacteria, Alphaproteobacteria, Acidobacteria and Actinobacteria were the main phyla in the tea orchard soils and accounted for more than 60% of the bacterial sequences. At the genus level, the relative abundance of beneficial bacteria, such as Pseudomonas, Rhodanobacter, Bradyrhizobium, Mycobacterium and Sphingomonas, significantly decreased in the 20-year tea orchard soils. Similar patterns of bacterial community structure were observed between 1-year and 10-year tea orchards, which significantly differed from those of 20-year tea orchards. Redundancy analysis indicated that soil organic carbon and pH showed high correlations (positive or negative) with the majority of the taxa. CONCLUSION Long-term tea cultivation altered the composition and structure of soil bacterial community, which led to the reduction in the beneficial bacteria. SIGNIFICANCE AND IMPACT OF THE STUDY The results can provide clues on how to regulate the soil microbial community and maintain the health of soils in tea orchard systems.
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Affiliation(s)
- Y C Li
- Agroecological Institute, Fujian Agriculture and Forestry University, Fuzhou, China.,Agricultural Ecology Institute, Fujian Academy of Agricultural Sciences, Fuzhou, China
| | - Z Li
- Agroecological Institute, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Z W Li
- Agroecological Institute, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Y H Jiang
- Agroecological Institute, Fujian Agriculture and Forestry University, Fuzhou, China
| | - B Q Weng
- Agricultural Ecology Institute, Fujian Academy of Agricultural Sciences, Fuzhou, China
| | - W X Lin
- Agroecological Institute, Fujian Agriculture and Forestry University, Fuzhou, China
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21
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Ji WH, Jiang YH, Ji YL, Li B, Mao WM. Prechemotherapy neutrophil : lymphocyte ratio is superior to the platelet : lymphocyte ratio as a prognostic indicator for locally advanced esophageal squamous cell cancer treated with neoadjuvant chemotherapy. Dis Esophagus 2016; 29:403-11. [PMID: 25625421 DOI: 10.1111/dote.12322] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The study aimed to evaluate the prognostic significance of prechemotherapy neutrophil to lymphocyte ratio and platelet to lymphocyte ratio, and preoperative neutrophil to lymphocyte ratio and platelet to lymphocyte ratio in locally advanced esophageal squamous cell cancer. We analyzed retrospectively locally advanced esophageal squamous cell cancer patients who had received neoadjuvant chemotherapy before undergoing a radical esophagectomy between 2009 and 2012. Neutrophil to lymphocyte ratio and platelet to lymphocyte ratio before chemotherapy and before the surgery were calculated. Univariate analyses showed that prechemotherapy neutrophil to lymphocyte ratio >5 (P = 0.048, hazard ratio = 2.86; 95% confidence interval: 1.01-8.12) and prechemotherapy platelet to lymphocyte ratio >130 (P = 0.025, hazard ratio = 5.50; 95% confidence interval: 1.23-24.55) were associated significantly with overall survival (OS), and prechemotherapy platelet to lymphocyte ratio >130 (P = 0.026, hazard ratio = 3.18; 95% confidence interval: 1.15-8.85) was associated significantly with progression-free survival. However, only prechemotherapy neutrophil to lymphocyte ratio >5 (P = 0.024, hazard ratio = 3.50; 95% confidence interval: 1.18-10.40) remained significantly associated with OS in multivariate analyses. Neither preoperative neutrophil to lymphocyte ratio nor platelet to lymphocyte ratio was associated with OS or progression-free survival. The prechemotherapy neutrophil to lymphocyte ratio >5 to preoperative neutrophil to lymphocyte ratio ≤5 group showed significantly worse OS than the prechemotherapy neutrophil to lymphocyte ratio ≤5 to preoperative neutrophil to lymphocyte ratio ≤5 group (P = 0.050). The prechemotherapy platelet to lymphocyte ratio >130 to preoperative platelet to lymphocyte ratio ≤130 group (P = 0.016) and platelet to lymphocyte ratio >130 to preoperative platelet to lymphocyte ratio >130 group (P = 0.042) showed significantly worse OS than the prechemotherapy platelet to lymphocyte ratio ≤30 to preoperative platelet to lymphocyte ratio ≤130 group. In conclusions, prechemotherapy neutrophil to lymphocyte ratio is an independent prognostic factor for OS in patients with advanced esophageal squamous cell cancer treated with neoadjuvant chemotherapy, and, as an adverse prognostic predictor, increased prechemotherapy neutrophil to lymphocyte ratio is superior to platelet to lymphocyte ratio. Maintaining a low neutrophil to lymphocyte ratio and platelet to lymphocyte ratio throughout treatment is a predictor of better OS.
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Affiliation(s)
- W H Ji
- Zhejiang Key Laboratory of Radiation Oncology, Zhejiang Cancer Research Institute, Zhejiang Cancer Hospital, Hangzhou, China
| | - Y H Jiang
- Zhejiang Key Laboratory of Radiation Oncology, Zhejiang Cancer Research Institute, Zhejiang Cancer Hospital, Hangzhou, China
| | - Y L Ji
- Zhejiang Key Laboratory of Radiation Oncology, Zhejiang Cancer Research Institute, Zhejiang Cancer Hospital, Hangzhou, China
| | - B Li
- Zhejiang Key Laboratory of Radiation Oncology, Zhejiang Cancer Research Institute, Zhejiang Cancer Hospital, Hangzhou, China
| | - W M Mao
- Zhejiang Key Laboratory of Radiation Oncology, Zhejiang Cancer Research Institute, Zhejiang Cancer Hospital, Hangzhou, China
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22
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Shashi V, McConkie-Rosell A, Schoch K, Kasturi V, Rehder C, Jiang YH, Goldstein DB, McDonald MT. Practical considerations in the clinical application of whole-exome sequencing. Clin Genet 2015; 89:173-81. [PMID: 25678066 DOI: 10.1111/cge.12569] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2015] [Revised: 02/04/2015] [Accepted: 02/08/2015] [Indexed: 01/17/2023]
Abstract
Despite the exciting advent of whole-exome sequencing (WES) in medical genetics practices, the optimal interpretation of results requires further actions such as reconsidering clinical information and obtaining further laboratory testing. There are no published data to guide clinicians in this process. In a retrospective study on 93 patients who underwent clinical WES, we set out to assess and resolve these practical challenges. With the laboratories reporting a molecular diagnostic rate of 25.8%, the medical geneticists and the laboratories were 90% concordant in their interpretation of the WES results. Divergence occurred when the medical geneticist reconsidered clinical information and/or additional information regarding pathogenicity of a variant. Variants of uncertain significance were reported in 86% of patients, with 53.7% needing follow-up, such as additional laboratory tests and genotyping of family members. By layering clinical data (e.g. mode of inheritance and phenotypic fit) on to the laboratory results, we developed clinical categories for the WES results. These categories of definite diagnosis (14/93), likely diagnosis (8/93), possible diagnosis (13/93) and no diagnosis (58/93) could be used to convey results to patients uniformly. Our framework for a clinically informed interpretation of the results enhances the utility of WES within medical genetics practices.
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Affiliation(s)
- V Shashi
- Department of Pediatrics, Division of Medical Genetics, Duke University Medical Center, Durham, NC, USA
| | - A McConkie-Rosell
- Department of Pediatrics, Division of Medical Genetics, Duke University Medical Center, Durham, NC, USA
| | - K Schoch
- Department of Pediatrics, Division of Medical Genetics, Duke University Medical Center, Durham, NC, USA
| | - V Kasturi
- Department of Pediatrics, Division of Medical Genetics, Duke University Medical Center, Durham, NC, USA
| | - C Rehder
- Department of Pathology, Duke University Medical Center, Durham, NC, USA
| | - Y H Jiang
- Department of Pediatrics, Division of Medical Genetics, Duke University Medical Center, Durham, NC, USA
| | - D B Goldstein
- Center for Human Genome Variation, Duke University Medical Center, Durham, NC, USA
| | - M T McDonald
- Department of Pediatrics, Division of Medical Genetics, Duke University Medical Center, Durham, NC, USA
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Schnorr K, Senftleben A, Schmid G, Rudenko A, Kurka M, Meyer K, Foucar L, Kübel M, Kling MF, Jiang YH, Düsterer S, Treusch R, Schröter CD, Ullrich J, Pfeifer T, Moshammer R. Multiple ionization and fragmentation dynamics of molecular iodine studied in IR-XUV pump-probe experiments. Faraday Discuss 2014; 171:41-56. [PMID: 25415043 DOI: 10.1039/c4fd00031e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The ionization and fragmentation dynamics of iodine molecules (I(2)) are traced using very intense (∼10(14) W cm(-2)) ultra-short (∼60 fs) light pulses with 87 eV photons of the Free-electron LASer at Hamburg (FLASH) in combination with a synchronized femtosecond optical laser. Within a pump-probe scheme the IR pulse initiates a molecular fragmentation and then, after an adjustable time delay, the system is exposed to an intense FEL pulse. This way we follow the creation of highly-charged molecular fragments as a function of time, and probe the dynamics of multi-photon absorption during the transition from a molecule to individual atoms.
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Affiliation(s)
- K Schnorr
- Max-Planck-Institut für Kernphysik, 69117, Heidelberg, Germany
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24
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Guo QL, Liang BL, Wang Y, Deng GY, Jiang YH, Zhang SH, Fu GS, Simmonds PJ. Propagation characteristics of a focused laser beam in a strontium barium niobate photorefractive crystal under reverse external electric field. Appl Opt 2014; 53:6422-6426. [PMID: 25322227 DOI: 10.1364/ao.53.006422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2014] [Accepted: 08/15/2014] [Indexed: 06/04/2023]
Abstract
The propagation characteristics of a focused laser beam in a SBN:75 photorefractive crystal strongly depend on the signal-to-background intensity ratio (R=Is/Ib) under reverse external electric field. In the range 20>R>0.05, the laser beam shows enhanced self-defocusing behavior with increasing external electric field, while it shows self-focusing in the range 0.03>R>0.01. Spatial solitons are observed under a suitable reverse external electric field for R=0.025. A theoretical model is proposed to explain the experimental observations, which suggest a new type of soliton formation due to "enhancement" not "screening" of the external electrical field.
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25
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Schnorr K, Senftleben A, Kurka M, Rudenko A, Schmid G, Pfeifer T, Meyer K, Kübel M, Kling MF, Jiang YH, Treusch R, Düsterer S, Siemer B, Wöstmann M, Zacharias H, Mitzner R, Zouros TJM, Ullrich J, Schröter CD, Moshammer R. Electron rearrangement dynamics in dissociating I(2)^(n+) molecules accessed by extreme ultraviolet pump-probe experiments. Phys Rev Lett 2014; 113:073001. [PMID: 25170702 DOI: 10.1103/physrevlett.113.073001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Indexed: 05/11/2023]
Abstract
The charge rearrangement in dissociating I_{2}^{n+} molecules is measured as a function of the internuclear distance R using extreme ultraviolet pulses delivered by the free-electron laser in Hamburg. Within an extreme ultraviolet pump-probe scheme, the first pulse initiates dissociation by multiply ionizing I_{2}, and the delayed probe pulse further ionizes one of the two fragments at a given time, thus triggering charge rearrangement at a well-defined R. The electron transfer between the fragments is monitored by analyzing the delay-dependent ion kinetic energies and charge states. The experimental results are in very good agreement with predictions of the classical over-the-barrier model demonstrating its validity in a thus far unexplored quasimolecular regime relevant for free-electron laser, plasma, and chemistry applications.
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Affiliation(s)
- K Schnorr
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - A Senftleben
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - M Kurka
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - A Rudenko
- J.R. Macdonald Laboratory, Kansas State University, Manhattan, Kansas 66506, USA
| | - G Schmid
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - T Pfeifer
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - K Meyer
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - M Kübel
- Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany
| | - M F Kling
- J.R. Macdonald Laboratory, Kansas State University, Manhattan, Kansas 66506, USA and Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany
| | - Y H Jiang
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
| | - R Treusch
- Deutsches Elektronen-Synchrotron, 22607 Hamburg, Germany
| | - S Düsterer
- Deutsches Elektronen-Synchrotron, 22607 Hamburg, Germany
| | - B Siemer
- Westfälische Wilhelms-Universität, 48419 Münster, Germany
| | - M Wöstmann
- Westfälische Wilhelms-Universität, 48419 Münster, Germany
| | - H Zacharias
- Westfälische Wilhelms-Universität, 48419 Münster, Germany
| | - R Mitzner
- Helmholtz-Zentrum Berlin, 12489 Berlin, Germany
| | - T J M Zouros
- Department of Physics, University of Crete, Post Office Box 2208, 71003 Heraklion, Crete, Greece
| | - J Ullrich
- Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany
| | - C D Schröter
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - R Moshammer
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
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26
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Huang DG, Hao DJ, Jiang YH, Cheng Y, Pan JW, Qiang YQ, He BR, Qian LX. The height for screw index (HSI) predicts the development of C2 nerve dysfunction associated with C1 lateral mass screw fixation for atlantoaxial instability. Eur Spine J 2014; 23:1092-8. [PMID: 24570123 DOI: 10.1007/s00586-013-3160-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Revised: 12/27/2013] [Accepted: 12/27/2013] [Indexed: 10/25/2022]
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27
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Wang XF, Liu JP, Shen KL, Ma R, Cui ZZ, Deng L, Shang YX, Zhao DY, Wang LB, Wan LY, Sun YQ, Li YN, Jiang ZY, Xu H, Li XM, Wu ZQ, Liu ZL, Hu YH, Huang Y, He CH, Zhang H, Jiang YH, Liu H, Wang Z. A cross-sectional study of the clinical characteristics of hospitalized children with community-acquired pneumonia in eight eastern cities in China. BMC Complement Altern Med 2013; 13:367. [PMID: 24364897 PMCID: PMC3880031 DOI: 10.1186/1472-6882-13-367] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/28/2013] [Accepted: 12/16/2013] [Indexed: 11/29/2022]
Abstract
BACKGROUND Community-acquired pneumonia in children is common in China. To understand current clinical characteristics and practice, we conducted a cross-sectional study to analyze quality of care on childhood pneumonia in eight eastern cities in China. METHODS Consecutive hospital records between January 1, 2010 and December 31, 2010 were collected from 13 traditional Chinese medicine (TCM) and western medicine (WM) hospitals in February, May, August, and November (25 cases per season, 100 cases over the year), respectively. A predesigned case report form was used to extract data from the hospital medical records. RESULTS A total of 1298 cases were collected and analyzed. Symptoms and signs upon admission at TCM and WM hospitals were cough (99.3% vs. 98.6%), rales (84.8% vs. 75.0%), phlegm (83.3% vs. 49.1%), and fever (74.9% vs. 84.0%) in frequency. Patients admitted to WM hospitals had symptoms and signs for a longer period prior to admission than patients admitted to TCM hospitals. Testing to identify etiologic agents was performed in 1140 cases (88.4%). Intravenous antibiotics were administered in 99.3% (595/598) of cases in TCM hospitals and in 98.6% (699/700) of cases in WM hospitals. Besides, Chinese herbal extract injection was used more frequently in TCM hospitals (491 cases, 82.1%) than in WM hospitals (212 cases, 30.3%) (p < 0.01). At discharge, 818 cases (63.0%) were clinically cured, with a significant difference between the cure rates in TCM (87.6%) and WM hospitals (42.0%) (OR = 9.8, 95% confidence interval (CI): 7.3 ~ 12.9, p < 0.01). Pathogen and previous medical history were more likely associated with the disappearance of rales (OR = 7.2, 95% CI: 4.8 ~ 10.9). Adverse effects were not reported from the medical records. CONCLUSIONS Intravenous use of antibiotics is highly prevalent in children with community-acquired pneumonia regardless of aetiology. There was difference between TCM and WM hospitals with regard to symptom profile and the use of antibiotics. Intravenous use of herbal injection was higher in TCM hospitals than in WM hospitals. Most of the cases were diagnosed based on clinical signs and symptoms without sufficient confirmation of aetiology. Audit of current practice is urgently needed to improve care.
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Affiliation(s)
- Xue-Feng Wang
- Department of Pediatrics, Affiliated Hospital of Liaoning University of Traditional Chinese Medicine, 33 Beiling Street, Huanggu District, Shenyang, Liaoning 110032, China
| | - Jian-Ping Liu
- Centre for Evidence-Based Chinese Medicine, Beijing University of Chinese Medicine, 11 Beisanhuan Dong Road, Chaoyang District, Beijing 100029, China
| | - Kun-Ling Shen
- Department of Respiratory Medicine, Beijing Children’s Hospital, 56 Nanlishi Road, Xicheng District, Beijing 100045, China
| | - Rong Ma
- First Teaching Hospital of Tianjin University of TCM, 314 Anshan Xi Road, Nankai District, Tianjin 300193, China
| | - Zhen-Ze Cui
- Department of Respiratory Medicine, Dalian Children’s Hospital, 154 Zhongshan Road, Xigang District, Dalian, Liaoning 116012, China
| | - Li Deng
- Department of Respiratory Medicine, Guangzhou Women and Children’s Medical Center, 318 Renminzhong Road, Yuexiu District, Guangzhou, Guangdong 510623, China
| | - Yun-Xiao Shang
- Department of Pediatric Respiratory Medicine, Shengjing Hospital of China Medical University, 36 Sanhao Street, Heping District, Shenyang, Liaoning 110004, China
| | - De-Yu Zhao
- Department of Pediatric Respiratory Medicine, Nanjing Children’ Hospital, 72 Guangzhou Road, Nanjing, Jiangsu 210008, China
| | - Li-Bo Wang
- Department of Pediatric Respiratory Medicine, Children’s Hospital of Fudan University, 399 Wanyuan Road, Minhang District, Shanghai 201102, China
| | - Li-Ya Wan
- Department of Pediatric Respiratory Medicine, Tianjin Children’s Hospital, 225 Machang Road, Hexi District, Tianjin 300074, China
| | - Yi-Qiu Sun
- Department of Pediatrics, Jiangsu Provincial Hospital of TCM, 155 Hanzhong Road, Nanjing, Jiangsu 210029, China
| | - Yan-Ning Li
- Department of Pediatrics, Affiliated Hospital of Shandong University of TCM, 42 Wenhua Xi Road, Jinan, Shandong 250011, China
| | - Zhi-Yan Jiang
- Department of Pediatrics, Longhua Hospital of Shanghai University of TCM, 725 South Wanping Road, Shanghai 200032, China
| | - Hua Xu
- Department of Pediatrics, Affiliated Hospital of Guangzhou University of TCM, 16 Baiyun Jichang Road, Guangzhou, Guangdong 510405, China
| | - Xin-Min Li
- First Teaching Hospital of Tianjin University of TCM, 314 Anshan Xi Road, Nankai District, Tianjin 300193, China
| | - Zhen-Qi Wu
- Department of Pediatrics, Affiliated Hospital of Liaoning University of Traditional Chinese Medicine, 33 Beiling Street, Huanggu District, Shenyang, Liaoning 110032, China
| | - Zhao-Lan Liu
- Centre for Evidence-Based Chinese Medicine, Beijing University of Chinese Medicine, 11 Beisanhuan Dong Road, Chaoyang District, Beijing 100029, China
| | - Ying-Hui Hu
- Department of Respiratory Medicine, Beijing Children’s Hospital, 56 Nanlishi Road, Xicheng District, Beijing 100045, China
| | - Yan Huang
- Department of Respiratory Medicine, Dalian Children’s Hospital, 154 Zhongshan Road, Xigang District, Dalian, Liaoning 116012, China
| | - Chun-Hui He
- Department of Respiratory Medicine, Guangzhou Women and Children’s Medical Center, 318 Renminzhong Road, Yuexiu District, Guangzhou, Guangdong 510623, China
| | - Han Zhang
- Department of Pediatric Respiratory Medicine, Shengjing Hospital of China Medical University, 36 Sanhao Street, Heping District, Shenyang, Liaoning 110004, China
| | - Yong-Hong Jiang
- Department of Pediatrics, Longhua Hospital of Shanghai University of TCM, 725 South Wanping Road, Shanghai 200032, China
| | - Hua Liu
- Department of Pediatrics, Affiliated Hospital of Guangzhou University of TCM, 16 Baiyun Jichang Road, Guangzhou, Guangdong 510405, China
| | - Zi Wang
- Department of Pediatrics, Affiliated Hospital of Liaoning University of Traditional Chinese Medicine, 33 Beiling Street, Huanggu District, Shenyang, Liaoning 110032, China
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28
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Schnorr K, Senftleben A, Kurka M, Rudenko A, Foucar L, Schmid G, Broska A, Pfeifer T, Meyer K, Anielski D, Boll R, Rolles D, Kübel M, Kling MF, Jiang YH, Mondal S, Tachibana T, Ueda K, Marchenko T, Simon M, Brenner G, Treusch R, Scheit S, Averbukh V, Ullrich J, Schröter CD, Moshammer R. Time-resolved measurement of interatomic coulombic decay in Ne2. Phys Rev Lett 2013; 111:093402. [PMID: 24033032 DOI: 10.1103/physrevlett.111.093402] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Indexed: 06/02/2023]
Abstract
The lifetime of interatomic Coulombic decay (ICD) [L. S. Cederbaum et al., Phys. Rev. Lett. 79, 4778 (1997)] in Ne2 is determined via an extreme ultraviolet pump-probe experiment at the Free-Electron Laser in Hamburg. The pump pulse creates a 2s inner-shell vacancy in one of the two Ne atoms, whereupon the ionized dimer undergoes ICD resulting in a repulsive Ne+(2p(-1))-Ne+(2p(-1)) state, which is probed with a second pulse, removing a further electron. The yield of coincident Ne+-Ne2+ pairs is recorded as a function of the pump-probe delay, allowing us to deduce the ICD lifetime of the Ne2(+)(2s(-1)) state to be (150±50) fs, in agreement with quantum calculations.
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Affiliation(s)
- K Schnorr
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
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Qian LX, Hao DJ, He BR, Jiang YH. Morphology of the atlas pedicle revisited: a morphometric CT-based study on 120 patients. Eur Spine J 2013; 22:1142-6. [PMID: 23354830 DOI: 10.1007/s00586-013-2662-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2012] [Revised: 10/25/2012] [Accepted: 01/06/2013] [Indexed: 10/27/2022]
Abstract
PURPOSE To quantify the dimensions of the atlas pedicles and to analyze the relationship between extra medullary height (EMH) with intra medullary height (IMH) of the atlas pedicle. METHODS The images of the patients who had CT scanning and three-dimensional (3D) reconstruction involving atlantoaxial complex between June 2011 and April 2012 and meet our inclusion criteria were studied retrospectively. After reformatting the original images, the EMH and IMH of the atlas pedicles were measured. RESULTS Extra medullary height and IMH were, respectively, 4.83 ± 1.13 and 1.29 ± 1.10 mm for males and 3.75 ± 0.93 and 0.60 ± 0.83 mm for females, with statistical difference (P < 0.05). EMH and IMH had some correlation (correlation coefficient r = 0.804) but showed a large variability. Of 240 pedicles of 120 cases, 47.92% (115 pedicles) were ≥1 mm; 12.08% (29 pedicles) were between 0 and 1 mm; and 40% (96 pedicles) were 0. CONCLUSION The EMH and the IMH of the atlas pedicles were measured by using CT images of the atlas, providing anatomic parameters for surgery. They showed a certain correlation but with a high variability. C1 pedicle screw fixation was well performed when the medullary canal was ≥1 mm, but the surgical procedure should be careful when it was between 0 and 1 mm, and avoided when there was no medullary canal in the atlas pedicle! So 3D CT reconstruction should be conducted to obtain data and establish individualized fixation strategy preoperatively.
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Affiliation(s)
- Li-Xiong Qian
- Xi'an Jiaotong University College of Medicine, Xi'an, Shanxi, People's Republic of China
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30
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Sekushin V, Püttner R, Fink RF, Martins M, Jiang YH, Aksela H, Aksela S, Kaindl G. A comprehensive study of the vibrationally resolved S 2p−1 Auger electron spectrum of carbonyl sulfide. J Chem Phys 2012; 137:044310. [PMID: 22852621 DOI: 10.1063/1.4734310] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- V Sekushin
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin-Dahlem, Germany
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Abstract
BACKGROUND Inconsistent accuracies of CT-guided thoracic spinal biopsies have been reported in previous studies. PURPOSE To determine the accuracy of CT-guided thoracic spinal biopsy, to compare the results with those previously reported, and to determine if there are any factors that influence the accuracy of CT-guided thoracic spinal biopsy. MATERIAL AND METHODS In total, 158 consecutive CT-guided percutaneous thoracic spine procedures (performed at the Department of Spinal Surgery, Xi'an Red Cross Hospital between April 2000 and July 2010) were reviewed. The 158 lesions were categorized by location and radiographic features. Pathological and clinical follow-up were used to determine accuracy. RESULTS The diagnostic accuracy of CT-guided thoracic spinal biopsy was 90.5% overall. Biopsy of metastatic bone disease (98.2%) was significantly more accurate than biopsies of primary tumors (80.9%) and of hematological malignancies (47.0%) (P < 0.05 and P < 0.005, respectively). The diagnostic accuracy of CT-guided thoracic spinal biopsy was significantly higher for the lower thoracic spine (97.6%) than for the middle (90.0%) or upper thoracic spine (80.4%) (P < 0.05 and P < 0.025, respectively). The diagnostic accuracy was significantly higher for lytic lesions (96.4%) than for sclerotic lesions (81.3%) (P < 0.010). The accuracy of biopsies performed using the transpedicular approach (91.0%) was not significantly different from that of biopsies performed using posterolateral approaches (91.5%) (0.25 < P < 0.5). CONCLUSION Percutaneous CT-guided thoracic spinal biopsy is a viable alternative to open surgical biopsy. The diagnostic accuracy was not affected by any of the variables except for lesion level, histology, and radiographic features.
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Affiliation(s)
- DJ Hao
- Department of Spinal Surgery, Xi'an Red Cross Hospital, Xi'an Shaanxi
| | - HH Sun
- Department of Orthopaedic, Tangdu Hospital, Fourth Military Medical University, Xi'an Shaanxi
| | - BR He
- Department of Spinal Surgery, Xi'an Red Cross Hospital, Xi'an Shaanxi
| | - TJ Liu
- Department of Spinal Surgery, Xi'an Red Cross Hospital, Xi'an Shaanxi
| | - YH Jiang
- Department of Radiology, Xi'an Red Cross Hospital, Xi'an Shaanxi, China
| | - QP Zhao
- Department of Spinal Surgery, Xi'an Red Cross Hospital, Xi'an Shaanxi
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Moshammer R, Pfeifer T, Rudenko A, Jiang YH, Foucar L, Kurka M, Kühnel KU, Schröter CD, Ullrich J, Herrwerth O, Kling MF, Liu XJ, Motomura K, Fukuzawa H, Yamada A, Ueda K, Ishikawa KL, Nagaya K, Iwayama H, Sugishima A, Mizoguchi Y, Yase S, Yao M, Saito N, Belkacem A, Nagasono M, Higashiya A, Yabashi M, Ishikawa T, Ohashi H, Kimura H, Togashi T. Second-order autocorrelation of XUV FEL pulses via time resolved two-photon single ionization of He. Opt Express 2011; 19:21698-21706. [PMID: 22109020 DOI: 10.1364/oe.19.021698] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Second-order autocorrelation spectra of XUV free-electron laser pulses from the Spring-8 Compact SASE Source (SCSS) have been recorded by time and momentum resolved detection of two-photon single ionization of He at 20.45 eV using a split-mirror delay-stage in combination with high-resolution recoil-ion momentum spectroscopy (COLTRIMS). From the autocorrelation trace we extract a coherence time of 8 ± 2 fs and a mean pulse duration of 28 ± 5 fs, much shorter than estimations based on electron bunch-length measurements. Simulations within the partial coherence model [Opt. Lett. 35, 3441 (2010)] are in agreement with experiment if a pulse-front tilt across the FEL beam diameter is taken into account that leads to a temporal shift of about 6 fs between both pulse replicas.
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Affiliation(s)
- R Moshammer
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany.
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Yang XJ, Jiang YH, Zheng JW, Hong L, Zhou Q, Qin ZP. The role of serum basic fibroblast growth factor, estradiol and urine basic fibroblast growth factor in differentiating infantile haemangiomas from vascular malformations. Phlebology 2011; 26:191-6. [PMID: 21597045 DOI: 10.1258/phleb.2010.010020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
OBJECTIVE To investigate the role of serum basic fibroblast growth factor (bFGF), estradiol (E2) and urine bFGF in differentiating infantile haemangiomas from vascular malformations. METHOD Between October 2007 and January 2009, 97 patients with haemangiomas and 25 patients with vascular malformations who had not been treated previously were included in this prospective study. Forty-eight patients with cleft lip and/or palate were selected as controls. The age of all subjects ranged from 1 to 30 months. The serum and urine levels of bFGF were determined by enzyme-linked immunosorbent assay (ELISA). The serum levels of E2 were examined via radioimmunoassay. All data were analysed with SPSS 11.5 software package. RESULTS The concentration of serum and urine bFGF was significantly different among the three groups (haemangiomas, vascular malformations and controls) (P = 0.027, P = 0.001). Significantly different urine bFGF levels were found in patients with proliferating and involuting haemangiomas (P = 0.04). The serum E2 levels were significantly higher in patients with haemangiomas than vascular malformations (P = 0.001) and controls (P = 0.001). CONCLUSION Serum bFGF and E2 as well as urine bFGF can be used to supplement the clinical diagnosis of congenital vascular anomalies. Urine bFGF combined with serum E2 may be the most potential markers for diagnosing haemangiomas and determining the proliferating stage of haemangiomas.
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Affiliation(s)
- X J Yang
- Department of Oral and Maxillofacial Surgery, College of Stomatology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China
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34
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Jiang YH, Rudenko A, Herrwerth O, Foucar L, Kurka M, Kühnel KU, Lezius M, Kling MF, van Tilborg J, Belkacem A, Ueda K, Düsterer S, Treusch R, Schröter CD, Moshammer R, Ullrich J. Ultrafast extreme ultraviolet induced isomerization of acetylene cations. Phys Rev Lett 2010; 105:263002. [PMID: 21231652 DOI: 10.1103/physrevlett.105.263002] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2010] [Indexed: 05/21/2023]
Abstract
Ultrafast isomerization of acetylene cations ([HC=CH](+)) in the low-lying excited A(2)Σ(g)(+) state, populated by the absorption of extreme ultraviolet (XUV) photons (38 eV), has been observed at the Free Electron Laser in Hamburg, (FLASH). Recording coincident fragments C(+) + CH2(+) as a function of time between XUV-pump and -probe pulses, generated by a split-mirror device, we find an isomerization time of 52±15 fs in a kinetic energy release (KER) window of 5.8<KER<8 eV, providing clear evidence for the existence of a fast, nonradiative decay channel.
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Affiliation(s)
- Y H Jiang
- Max-Planck-Institut für Kernphysik, Heidelberg, Germany
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35
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Jiang YH, Rudenko A, Kurka M, Kühnel KU, Ergler T, Foucar L, Schöffler M, Schössler S, Havermeier T, Smolarski M, Cole K, Dörner R, Düsterer S, Treusch R, Gensch M, Schröter CD, Moshammer R, Ullrich J. Few-photon multiple ionization of N2 by extreme ultraviolet free-electron laser radiation. Phys Rev Lett 2009; 102:123002. [PMID: 19392273 DOI: 10.1103/physrevlett.102.123002] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2008] [Indexed: 05/27/2023]
Abstract
Few-photon multiple ionization of N2 was studied differentially in a reaction microscope using 44 eV, approximately 25 fs, intense ( approximately 10(13) W/cm(2)) photon pulses from FLASH. Sequential ionization is observed to dominate. For various intermediate charge states N(2)(n+0 we find a considerable excess of photons absorbed compared to the minimum number that would energetically be required. Photoionization of aligned N(2)(n+) ions, produced by photon absorption in sequential steps, is explored and few-photon absorption pathways are traced by inspecting kinetic energy releases and fragment-ion angular distributions.
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Affiliation(s)
- Y H Jiang
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
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36
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Su J, Xi BD, Liu HL, Jiang YH, Warith MA. An inexact multi-objective dynamic model and its application in China for the management of municipal solid waste. Waste Manag 2008; 28:2532-2541. [PMID: 18572399 DOI: 10.1016/j.wasman.2008.01.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2007] [Revised: 12/18/2007] [Accepted: 01/17/2008] [Indexed: 05/26/2023]
Abstract
With the development of science and technology, solid waste management has become a serious environmental problem for most communities all over the world. This paper presents a multi-objective optimization model for the management of municipal solid waste (MSW) via an uncertainty approach. In this model, the system cost of solid waste management and the environmental impact are considered as the main objectives, and some necessary constraints based on the characteristics of China are included; additionally, Pollution loss theory is applied to evaluate the environmental impact. This model is applied to the City of Fo Shan, China. Compared with the primary project of Fo Shan, which is provided by the government, the results of the optimization procedure show that the overall system cost could be reduced by $1-2.4/ton, i.e., $3.7 million/yr. The model presented in this paper was proven to be an effective response to the multi-objective solid waste management problem, and provides a new technique to optimize MSW management and operation. Why is the optimization result better? By analyzing the modelling with respect to function, constraints, and results, we conclude that the profit would be augmented due to the amount of the waste that would be treated by recycling technology, which would increase rapidly during the planning time; thus, the total system cost could be reduced accordingly.
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Affiliation(s)
- J Su
- Beijing Normal university, Beijing 100875, China.
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37
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Rudenko A, Foucar L, Kurka M, Ergler T, Kühnel KU, Jiang YH, Voitkiv A, Najjari B, Kheifets A, Lüdemann S, Havermeier T, Smolarski M, Schössler S, Cole K, Schöffler M, Dörner R, Düsterer S, Li W, Keitel B, Treusch R, Gensch M, Schröter CD, Moshammer R, Ullrich J. Recoil-ion momentum distributions for two-photon double ionization of He and Ne by 44 eV free-electron laser radiation. Phys Rev Lett 2008; 101:073003. [PMID: 18764529 DOI: 10.1103/physrevlett.101.073003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2008] [Indexed: 05/26/2023]
Abstract
Recoil-ion momentum distributions for two-photon double ionization of He and Ne (variant Planck's over omega=44 eV) have been recorded with a reaction microscope at FLASH (the free-electron laser at Hamburg) at an intensity of approximately 1 x 10(14) W/cm2 exploring the dynamics of the two fundamental two-photon-two-electron reaction pathways, namely, sequential and direct (or nonsequential) absorption of the photons. We find strong differences in the recoil-ion momentum patterns for the two mechanisms pointing to the significantly different two-electron emission dynamics and thus provide serious constraints for theoretical models.
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Affiliation(s)
- A Rudenko
- Max-Planck Advanced Study Group at CFEL, Notkestrasse 85, 22607 Hamburg, Germany
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38
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Xi BD, Qin XS, Su XK, Jiang YH, Wei ZM. Characterizing effects of uncertainties in MSW composting process through a coupled fuzzy vertex and factorial-analysis approach. Waste Manag 2007; 28:1609-1623. [PMID: 17950590 DOI: 10.1016/j.wasman.2007.06.027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2006] [Revised: 03/02/2007] [Accepted: 06/15/2007] [Indexed: 05/25/2023]
Abstract
A coupled fuzzy vertex and factorial-analysis approach was developed in this study for systematically characterizing effects of uncertainties in a municipal solid waste composting process. A comprehensive composting process model was also embedded into the system framework and used to address substrate decomposition and biomass growth, as well as the interactions between moisture contents, temperatures, and oxygen concentrations. The applicability of the proposed method was verified through a custom-made pilot-scale composting system. Results from fuzzy simulation indicated that the fuzzy vertex method could effectively communicate implicit knowledge into dynamic simulations and thus provide valuable information for enhancing composting process control under uncertainty. The factorial analysis was effective in quantifying the proportion to which the uncertainty of each single or interactive effect of model parameters contributes to the overall uncertainty of the system outcomes. Thus, sensitive parameters that may lead to errors or unreasonable predictions can be determined. The proposed study system could not only be used in characterizing combined effects of uncertainties for composting processes, but was also applicable to many other environmental modelling systems.
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Affiliation(s)
- B D Xi
- Chinese Research Academy of Environmental Sciences, Beijing, China.
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39
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Moshammer R, Jiang YH, Foucar L, Rudenko A, Ergler T, Schröter CD, Lüdemann S, Zrost K, Fischer D, Titze J, Jahnke T, Schöffler M, Weber T, Dörner R, Zouros TJM, Dorn A, Ferger T, Kühnel KU, Düsterer S, Treusch R, Radcliffe P, Plönjes E, Ullrich J. Few-photon multiple ionization of ne and ar by strong free-electron-laser pulses. Phys Rev Lett 2007; 98:203001. [PMID: 17677687 DOI: 10.1103/physrevlett.98.203001] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2007] [Indexed: 05/16/2023]
Abstract
Few-photon multiple ionization of Ne and Ar atoms by strong vacuum ultraviolet laser pulses from the free-electron laser at Hamburg was investigated differentially with the Heidelberg reaction microscope. The light-intensity dependence of Ne2+ production reveals the dominance of nonsequential two-photon double ionization at intensities of I<6x10(12) W/cm2 and significant contributions of three-photon ionization as I increases. Ne2+ recoil-ion-momentum distributions suggest that two electrons absorbing "instantaneously" two photons are ejected most likely into opposite hemispheres with similar energies.
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Affiliation(s)
- R Moshammer
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
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40
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Belmonte MK, Cook EH, Anderson GM, Rubenstein JLR, Greenough WT, Beckel-Mitchener A, Courchesne E, Boulanger LM, Powell SB, Levitt PR, Perry EK, Jiang YH, DeLorey TM, Tierney E. Autism as a disorder of neural information processing: directions for research and targets for therapy. Mol Psychiatry 2004; 9:646-63. [PMID: 15037868 DOI: 10.1038/sj.mp.4001499] [Citation(s) in RCA: 255] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The broad variation in phenotypes and severities within autism spectrum disorders suggests the involvement of multiple predisposing factors, interacting in complex ways with normal developmental courses and gradients. Identification of these factors, and the common developmental path into which they feed, is hampered by the large degrees of convergence from causal factors to altered brain development, and divergence from abnormal brain development into altered cognition and behaviour. Genetic, neurochemical, neuroimaging, and behavioural findings on autism, as well as studies of normal development and of genetic syndromes that share symptoms with autism, offer hypotheses as to the nature of causal factors and their possible effects on the structure and dynamics of neural systems. Such alterations in neural properties may in turn perturb activity-dependent development, giving rise to a complex behavioural syndrome many steps removed from the root causes. Animal models based on genetic, neurochemical, neurophysiological, and behavioural manipulations offer the possibility of exploring these developmental processes in detail, as do human studies addressing endophenotypes beyond the diagnosis itself.
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Affiliation(s)
- M K Belmonte
- Autism Research Centre, Departments of Psychiatry and Experimental Psychology, University of Cambridge, Douglas House, 18b Trumpington Road, Cambridge CB2 2AH, UK.
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Abstract
A three dimensional (3D) model of Ca(2+) diffusion and binding within a sarcomere of a myofibril, including Ca(2+) binding sites troponin, parvalbumin, sarcoplasmic reticulum Ca(2+) pump, and fluorescent Ca(2+)-indicator dye (fluo-3), was developed to numerically simulate laser scanning confocal microscope images of Ca(2+) "sparks" in skeletal muscle. Diffusion of free dye (D), calcium dye (CaD), and Ca(2+) were included in the model. The Ca(2+) release current was assumed to last 8 ms, to arise within 4 x 10(-5) microm(3) at the triad and to be constant during release. Line scan confocal fluorescence images of Ca(2+) sparks were simulated by 3D convolution of the calculated distribution of CaD with a Gaussian kernel approximating the point spread function of the microscope. Our results indicate that the amplitude of the simulated spark is proportional to the Ca(2+) release current if all other model parameters are constant. For a given release current, the kinetic properties and concentrations of the binding sites and the diffusion parameters of D, CaD, and Ca(2+) all have significant effects on the simulated Ca(2+) sparks. The simulated sparks exhibited similar amplitudes and temporal properties, but less spatial spread than experimentally observed sparks.
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Affiliation(s)
- Y H Jiang
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, Maryland 21201, USA
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Abstract
This work was designed to elucidate the possible involvement of endogenous endomorphin-I (EM1) in analgesia induced by electroacupuncture of low or high frequencies. Taking radiant heat tail flick latency (TFL) as an indication of nociception, rats were subjected to intrathecal (i.t.) injection of 10 microl antiserum against EM1 (EM1-AS) or normal rabbit serum (NRS, as control) and then followed by 2 or 100 Hz electroacupuncture stimulation for 30 min. The analgesia induced by 2 Hz electroacupuncture was attenuated by i.t. injection of EM1-AS at 1:10 and 1:100 but not at 1:1000 dilution. No such suppressive effect was observed for 100 Hz EA analgesia when EM1-AS was injected i.t. at any dilutions. These results indicate that EM1 is involved in 2 Hz but not 100 Hz electroacupuncture analgesia at spinal level.
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Affiliation(s)
- Z Han
- Neuroscience Research Institute, Beijing Medical University, China
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Tsai TF, Jiang YH, Bressler J, Armstrong D, Beaudet AL. Paternal deletion from Snrpn to Ube3a in the mouse causes hypotonia, growth retardation and partial lethality and provides evidence for a gene contributing to Prader-Willi syndrome. Hum Mol Genet 1999; 8:1357-64. [PMID: 10400982 DOI: 10.1093/hmg/8.8.1357] [Citation(s) in RCA: 121] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Prader-Willi syndrome (PWS) is caused by paternal deficiency of human chromosome 15q11-q13. There is conflicting evidence from human translocations regarding the direct involvement of SNRPN in the pathogenesis of PWS and it is not known if the phenotypic features result from the loss of expression of a single imprinted gene or multiple genes. In an attempt to dissect genotype/phenotype correlations for the homologous region of mouse chromosome 7C, we prepared three mutant genotypes: (i) mice with a deletion of Snrpn exon 2, which removes a portion of a small, upstream open reading frame (ORF); (ii) mice with double targeting for Snrpn exon 2 and Ube3a; (iii) mice deleted from Snrpn to Ube3a, removing coding exons for both loci and intervening genes. Mice deleted for Snrpn exon 2 have no obvious phenotypic abnormalities and switching of the genomic imprint for the region is conserved. Mice carrying the Snrpn - Ube3a deletion on the paternal chromosome showed severe growth retardation, hypotonia and approximately 80% lethality before weaning. The surviving mice were fertile and were not obese up to 14 months of age. The deletion was transmitted for multiple generations and continued to cause partial lethality when inherited paternally, but not when inherited maternally. The normal imprinted expression and methylation patterns of necdin, a gene outside the deletion region, indicate that the deletion is not an imprinting mutation. The data suggest the presence of a paternally expressed structural gene between Snrpn and Ipw whose deficiency causes lethality, although other possibilities exist, including position effects on expression of imprinted genes or that simultaneous deficiency of both ORFs of Snrpn causes lethality.
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Affiliation(s)
- T F Tsai
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
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Davidson LA, Lupton JR, Jiang YH, Chapkin RS. Carcinogen and dietary lipid regulate ras expression and localization in rat colon without affecting farnesylation kinetics. Carcinogenesis 1999; 20:785-91. [PMID: 10334194 DOI: 10.1093/carcin/20.5.785] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Epidemiological and experimental data suggest that dietary fiber and fat are major determinants of colorectal cancer. However, the mechanisms by which these dietary constituents alter the incidence of colon cancer have not been elucidated. Evidence indicates that dominant gain-of-function mutations short-circuit protooncogenes and contribute to the pathogenesis of cancer. Therefore, we began to dissect the mechanisms whereby dietary fat and fiber, fed during the initiation, promotion and progression stages of colon tumorigenesis, regulate ras p21 localization, expression and mutation frequency. Male Sprague-Dawley rats (140) were provided with corn oil or fish oil and pectin or cellulose plus or minus the carcinogen azoxymethane (AOM) in a 2 x 2 x 2 factorial design and killed after 34 weeks. We have previously shown adenocarcinoma incidence in these animals to be 70.3% (52/74) for corn oil + AOM and 56.1% (37/66) for fish oil + AOM (P < 0.05). Total ras expression as well as ras membrane:cytosol ratio was 4- to 6-fold higher in colon tumors than in mucosa from AOM- or saline-injected rats. Expression of ras in the mucosal membrane fraction was 13% higher for animals fed corn oil compared with fish oil feeding (P < 0.05), which is noteworthy since ras must be localized at the plasma membrane to function. The elevated ras membrane:cytosol ratio in tumors was not due to increased farnesyl protein transferase activity or prenylation state, as nearly all detectable ras was in the prenylated form. Phosphorylated p42 and p44 mitogen activated protein kinase (ERK) expression was two-fold higher in tumor extracts compared with uninvolved mucosa from AOM- and saline-injected rats (P < 0.05). The frequency of K-ras mutations was not significantly different between the various groups, but there was a trend toward a greater incidence of mutations in tumors from corn oil fed rats (85%) compared with fish oil fed rats (58%). Our results indicate that the carcinogen-induced changes in ras expression and membrane localization are associated with the in vivo activation of the ERK pathway. In addition, suppression of tumor development by dietary n-3 polyunsaturated fatty acids may be partly due to a combined effect on colonic ras expression, membrane localization, and mutation frequency.
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Affiliation(s)
- L A Davidson
- Faculty of Nutrition, Molecular and Cell Biology Group, Texas A&M University, College Station 77843-2471, USA
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Jiang YH, Armstrong D, Albrecht U, Atkins CM, Noebels JL, Eichele G, Sweatt JD, Beaudet AL. Mutation of the Angelman ubiquitin ligase in mice causes increased cytoplasmic p53 and deficits of contextual learning and long-term potentiation. Neuron 1998; 21:799-811. [PMID: 9808466 DOI: 10.1016/s0896-6273(00)80596-6] [Citation(s) in RCA: 634] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The E6-AP ubiquitin ligase (human/mouse gene UBE3A/Ube3a) promotes the degradation of p53 in association with papilloma E6 protein, and maternal deficiency causes human Angelman syndrome (AS). Ube3a is imprinted with silencing of the paternal allele in hippocampus and cerebellum in mice. We found that the phenotype of mice with maternal deficiency (m-/p+) for Ube3a resembles human AS with motor dysfunction, inducible seizures, and a context-dependent learning deficit. Long-term potentiation (LTP) was severely impaired in m-/p+ mice despite normal baseline synaptic transmission and neuroanatomy, indicating that ubiquitination may play a role in mammalian LTP and that LTP may be abnormal in AS. The cytoplasmic abundance of p53 was increased in postmitotic neurons in m-/p+ mice and in AS, providing a potential biochemical basis for the phenotype through failure to ubiquitinate and degrade various effectors.
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Affiliation(s)
- Y H Jiang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas 77030, USA
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Davidson LA, Aymond CM, Jiang YH, Turner ND, Lupton JR, Chapkin RS. Non-invasive detection of fecal protein kinase C betaII and zeta messenger RNA: putative biomarkers for colon cancer. Carcinogenesis 1998; 19:253-7. [PMID: 9498273 DOI: 10.1093/carcin/19.2.253] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
We have developed a non-invasive method utilizing feces, containing sloughed colonocytes, as a sensitive technique for detecting diagnostic colonic biomarkers. In this study, we used the rat colon carcinogenesis model to determine if changes in fecal protein kinase C (PKC) expression have predictive value in monitoring the neoplastic process. Weanling rats were injected with saline or azoxymethane (AOM) and 36 weeks later fecal samples and mucosa were collected, poly A+ RNA isolated, and quantitative RT-PCR performed using primers to PKC betaII and zeta. Fecal PKC betaII and zeta mRNA levels were altered by the presence of a tumor, with tumor-bearing animals having a 3-fold higher (P < 0.05) PKC betaII expression as compared with animals without tumors. In addition, AOM-injection increased mucosal PKC betaII mRNA expression compared with saline controls. No effect of tumor incidence on mucosal PKC betaII expression was observed. In contrast, fecal PKC zeta expression was 2.5-fold lower (P < 0.05) in animals injected with azoxymethane versus saline. Since tumor incidence exerts a reciprocal effect on fecal PKC betaII and zeta mRNA expression, data were also expressed as the ratio between PKC betaII and zeta. The isozyme ratio was strongly related to tumor incidence, i.e. ratio for animals with tumors was 2.18 +/- 1.25, animals without tumors was 0.50 +/- 0.16, P = 0.025. We demonstrate that the expression of fecal PKC betaII and zeta may serve as a noninvasive marker for development of colon tumors. A sensitive technique for the detection of colon cancer is of importance since early diagnosis can substantially reduce mortality.
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Affiliation(s)
- L A Davidson
- Molecular and Cell Biology Group, Faculty of Nutrition, Texas A&M University, College Station 77843-2471, USA
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Chapkin RS, Jiang YH, Davidson LA, Lupton JR. Modulation of intracellular second messengers by dietary fat during colonic tumor development. Adv Exp Med Biol 1997; 422:85-96. [PMID: 9361817 DOI: 10.1007/978-1-4757-2670-1_7] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
In conclusion, dietary n-3 polyunsaturated fatty acids found in fish oil are capable of suppressing carcinogen-induced ras activation in the colon prior to overt neoplasia. This in turn blocks the oncogene driven increase in colonic diacylglycerol mass, preventing the persistent activation and chronic down-regulation of PKC isozymes, thereby maintaining tissue PKC levels. Since the maintenance of crypt PKC levels may sustain the homeostatic balance between cell proliferation, differentiation and apoptosis, the ability of dietary n-3 polyunsaturated fatty acids to block the carcinogen-induced decrease in steady-state levels of colonic mucosal PKC may in part explain why these fatty acids protect against colon tumorigenesis. Additional studies are required in order to elucidate the mechanisms by which select dietary lipids reduce colonic tumor incidence. This research focus is absolutely essential, because if we do not know why a dietary component is protective or promotive of cancer, then we have no right to attempt to modify eating behaviors.
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Affiliation(s)
- R S Chapkin
- Faculty of Nutrition, Texas A&M University 77843-2471, USA.
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Abstract
To elucidate the mechanisms by which dietary factors influence the risk of colon cancer, we investigated the effect of select dietary fats and fibers on atypical protein kinase C (PKC) lambda expression. Azoxymethane- and saline (control)-injected rats were fed diets containing either corn oil or fish oil (15 g/100 g) and either cellulose or pectin (6 g/100 g) and killed at two time points (15 and 37 wk) in a 2 x 2 x 2 x 2 factorial design. Colonic PKC lambda protein and mRNA levels were determined using immunoblotting and relative competitive polymerase chain reaction, respectively. Azoxymethane suppressed cytosolic PKC lambda protein levels compared with the saline controls at both time points, and this suppression was partially blocked by fish oil feeding at 15 wk and pectin at 37 wk. Also, at 15 wk, azoxymethane-injected rats fed corn oil had higher levels of membrane PKC lambda relative to the other treatment groups. Overall, expression of PKC lambda mRNA was not correlated with differences in the respective isozyme protein levels. Therefore, the chemopreventive effects of dietary fish oil and pectin are associated with the blockage of azoxymethane-induced alterations in colonic PKC lambda protein expression.
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Affiliation(s)
- Y H Jiang
- Faculty of Nutrition, Molecular and Cell Biology Group, Texas A&M University, College Station, TX 77843-2471, USA
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Sutcliffe JS, Jiang YH, Galijaard RJ, Matsuura T, Fang P, Kubota T, Christian SL, Bressler J, Cattanach B, Ledbetter DH, Beaudet AL. The E6-Ap ubiquitin-protein ligase (UBE3A) gene is localized within a narrowed Angelman syndrome critical region. Genome Res 1997; 7:368-77. [PMID: 9110176 PMCID: PMC139148 DOI: 10.1101/gr.7.4.368] [Citation(s) in RCA: 84] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Angelman syndrome (AS) and Prader-Willi syndrome (PWS) are distinct clinical phenotypes resulting from maternal and paternal deficiencies, respectively, in human chromosome 15qll-q13. Although several imprinted, paternally expressed transcripts have been identified within the PWS candidate region, no maternally expressed gene has yet been identified within the AS candidate region. We have developed an integrated physical map spanning the PWS and AS candidate regions and localized two breakpoints, including a cryptic t(14;15) translocation associated with AS and a non-AS 15q deletion, which substantially narrow the AS candidate region to approximately 250 kb. Mapping data indicate that the entire transcriptional unit of the E6-AP ubiquitin-protein ligase (UBE3A) gene lies within the AS region. The UBE3A locus expresses a transcript of approximately 5 kb at low to moderate levels in all tissues tested. The mouse homolog of UBE3A was cloned and sequenced revealing a high degree of conservation at nucleotide and protein levels. Northern and RT-PCR analysis of Ube3a expression in mouse tissues from animals with segmental, paternal uniparental disomy failed to detect substantially reduced or absent expression compared to control animals, failing to provide any evidence for maternal-specific expression from this locus. Recent identification of de novo truncating mutations in UBE3A taken with these observations indicates that mutations in UBE3A can lead to AS and suggests that this locus may encode both imprinted and biallelically expressed products.
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MESH Headings
- Amino Acid Sequence
- Angelman Syndrome/genetics
- Animals
- Blotting, Northern
- Blotting, Southern
- Chromosome Aberrations
- Chromosome Mapping/methods
- Chromosomes, Artificial, Yeast
- Chromosomes, Human, Pair 15
- Cloning, Molecular
- Cosmids
- Electrophoresis, Gel, Pulsed-Field
- Female
- Gene Deletion
- Gene Dosage
- Gene Expression Regulation, Developmental
- Genetic Markers
- Genomic Imprinting
- Humans
- In Situ Hybridization
- Ligases/genetics
- Male
- Mice
- Mice, Mutant Strains
- Molecular Sequence Data
- Paternity
- Prader-Willi Syndrome/genetics
- Sequence Homology, Amino Acid
- Sequence Homology, Nucleic Acid
- Tissue Distribution
- Transcription, Genetic
- Translocation, Genetic
- Ubiquitin-Protein Ligases
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Abstract
In order to elucidate the influence of dietary constituents on colonic intracellular signal transduction, the effect of different fats on rat colonic epithelial protein kinase C (PKC) alpha (classical), delta (novel) and lambda-zeta (atypical) expression was determined in carcinogen-treated animals. Sprague-Dawley rats were provided with one of two fats (corn oil and fish oil); plus or minus the carcinogen azoxymethane (AOM) and killed at two time points (15 and 37 weeks) in a 2x2x2 factorial design. At 5 and 6 weeks of age, animals were injected s.c. with either AOM at a dose of 15 mg/kg body weight or saline once a week for 2 weeks and continued on the same diet until termination of the study. At 15 and 37 weeks after the second injection, 10 rats from each treatment group were killed. Colonic PKC alpha, delta and lambda-zeta steady-state protein and mRNA levels were determined using immunoblotting and relative quantitative polymerase chain reaction, respectively. Colonic mucosa from rats injected with AOM had significantly suppressed membrane and cytosolic PKC alpha and cytosolic lambda-zeta protein levels (P < 0.05) as compared to saline-injected control animals at both time points. In contrast, rats fed fish oil diets had significantly higher (P < 0.05) cytosolic PKC delta and lambda-zeta protein levels relative to animals fed corn oil diets. However, the effect of diet and AOM on the steady-state expression of PKC alpha, delta and zeta mRNA was not consistent with changes in the respective isozyme protein levels, suggesting regulation at the post-transcriptional level. These data demonstrate that dietary fish oil blocks the carcinogen-induced decrease in the steady-state levels of colonic mucosal PKC delta and lambda-zeta, which may in part explain why this fat source protects against colon cancer development.
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Affiliation(s)
- Y H Jiang
- Faculty of Nutrition, Molecular and Cell Biology Group, Texas A&M University, College Station 77843-2471, USA
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