1
|
Cao JK, Fan HQ, Xiao YB, Wang D, Liu CG, Peng XM, Gao XR, Tang SH, Han T, Mei YB, Liang HY, Wang SM, Wang F, Li QP. [Establishment and efficiency test of a clinical prediction model of bronchopulmonary dysplasia associated pulmonary hypertension in very premature infants]. Zhonghua Er Ke Za Zhi 2024; 62:129-137. [PMID: 38264812 DOI: 10.3760/cma.j.cn112140-20230912-00178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/25/2024]
Abstract
Objective: To develop a risk prediction model for identifying bronchopulmonary dysplasia (BPD) associated pulmonary hypertension (PH) in very premature infants. Methods: This was a retrospective cohort study. The clinical data of 626 very premature infants whose gestational age <32 weeks and who suffered from BPD were collected from October 1st, 2015 to December 31st, 2021 of the Seventh Medical Center of the People's Liberation Army General Hospital as a modeling set. The clinical data of 229 very premature infants with BPD of Hunan Children's Hospital from January 1 st, 2020 to December 31st, 2021 were collected as a validation set for external verification. The very premature infants with BPD were divided into PH group and non PH group based on the echocardiogram after 36 weeks' corrected age in the modeling set and validation set, respectively. Univariate analysis was used to compare the basic clinical characteristics between groups, and collinearity exclusion was carried out between variables. The risk factors of BPD associated PH were further screened out by multivariate Logistic regression, and the risk assessment model was established based on these variables. The receiver operating characteristic (ROC) area under curve (AUC) and Hosmer-Lemeshow goodness-of-fit test were used to evaluate the model's discrimination and calibration power, respectively. And the calibration curve was used to evaluate the accuracy of the model and draw the nomogram. The bootstrap repeated sampling method was used for internal verification. Finally, decision curve analysis (DCA) to evaluate the clinical practicability of the model was used. Results: A total of 626 very premature infants with BPD were included for modeling set, including 85 very premature infants in the PH group and 541 very premature infants in the non PH group. A total of 229 very premature infants with BPD were included for validation set, including 24 very premature infants in the PH group and 205 very premature infants in the non PH group. Univariate analysis of the modeling set found that 22 variables, such as artificial conception, fetal distress, gestational age, birth weight, small for gestational age, 1 minute Apgar score ≤7, antenatal corticosteroids, placental abruption, oligohydramnios, multiple pulmonary surfactant, neonatal respiratory distress syndrome (NRDS)>stage Ⅱ, early pulmonary hypertension, moderate-severe BPD, and hemodynamically significant patent ductus arteriosus (hsPDA) all had statistically significant influence between the PH group and the non PH group (all P<0.05). Antenatal corticosteroids, fetal distress, NRDS >stage Ⅱ, hsPDA, pneumonia and days of invasive mechanical ventilation were identified as predictive variables and finally included to establish the Logistic regression model. The AUC of this model was 0.86 (95%CI 0.82-0.90), the cut-off value was 0.17, the sensitivity was 0.77, and the specificity was 0.84. Hosmer-Lemeshow goodness-of-fit test showed that P>0.05. The AUC for external validation was 0.88, and the Hosmer-Lemeshow goodness-of-fit test suggested P>0.05. Conclusions: A high sensitivity and specificity risk prediction model of PBD associated PH in very premature infants was established. This predictive model is useful for early clinical identification of infants at high risk of BPD associated PH.
Collapse
Affiliation(s)
- J K Cao
- Department of Neonatology, Senior Department of Pediatrics, the Seventh Medical Center of the People's Liberation Army General Hospital (the Second School of Clinical Medicine, Southern Medical University), Beijing 100700, China
| | - H Q Fan
- Department of Cardiology, Hunan Children's Hospital, Changsha 410007, China
| | - Y B Xiao
- Department of Cardiology, Hunan Children's Hospital, Changsha 410007, China
| | - D Wang
- Department of Cardiology, Hunan Children's Hospital, Changsha 410007, China
| | - C G Liu
- Department of Neonatology, Senior Department of Pediatrics, the Seventh Medical Center of the People's Liberation Army General Hospital (the Second School of Clinical Medicine, Southern Medical University), Beijing 100700, China
| | - X M Peng
- Department of Neonatology, Hunan Children's Hospital, Changsha 410007, China
| | - X R Gao
- Department of Neonatology, Hunan Children's Hospital, Changsha 410007, China
| | - S H Tang
- Department of Neonatology, Senior Department of Pediatrics, the Seventh Medical Center of the People's Liberation Army General Hospital (the Second School of Clinical Medicine, Southern Medical University), Beijing 100700, China
| | - T Han
- Department of Neonatology, Senior Department of Pediatrics, the Seventh Medical Center of the People's Liberation Army General Hospital (the Second School of Clinical Medicine, Southern Medical University), Beijing 100700, China
| | - Y B Mei
- Department of Neonatology, Senior Department of Pediatrics, the Seventh Medical Center of the People's Liberation Army General Hospital (the Second School of Clinical Medicine, Southern Medical University), Beijing 100700, China
| | - H Y Liang
- Department of Neonatology, Senior Department of Pediatrics, the Seventh Medical Center of the People's Liberation Army General Hospital (the Second School of Clinical Medicine, Southern Medical University), Beijing 100700, China
| | - S M Wang
- Department of Neonatology, Senior Department of Pediatrics, the Seventh Medical Center of the People's Liberation Army General Hospital (the Second School of Clinical Medicine, Southern Medical University), Beijing 100700, China
| | - F Wang
- Department of Neonatology, Senior Department of Pediatrics, the Seventh Medical Center of the People's Liberation Army General Hospital (the Second School of Clinical Medicine, Southern Medical University), Beijing 100700, China
| | - Q P Li
- Department of Neonatology, Senior Department of Pediatrics, the Seventh Medical Center of the People's Liberation Army General Hospital (the Second School of Clinical Medicine, Southern Medical University), Beijing 100700, China
| |
Collapse
|
2
|
Tang SH, Hong XY, Feng ZC, Li QP. [Extracorporeal membrane oxygenation in preterm infants: current status and future perspectives]. Zhonghua Er Ke Za Zhi 2023; 61:82-85. [PMID: 36594128 DOI: 10.3760/cma.j.cn112140-20221021-00892] [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: 01/04/2023]
Affiliation(s)
- S H Tang
- Neonatal Intensive Care Unit, Faculty of Pediatrics, the Seventh Medical Center of People's Liberation Army General Hospital, National Engineering Laboratory for Birth Defects Prevention and Control of Key Technology, Beijing Key Laboratory of Pediatric Organ Failure, Beijing 100700, China
| | - X Y Hong
- Neonatal Intensive Care Unit, Faculty of Pediatrics, the Seventh Medical Center of People's Liberation Army General Hospital, National Engineering Laboratory for Birth Defects Prevention and Control of Key Technology, Beijing Key Laboratory of Pediatric Organ Failure, Beijing 100700, China
| | - Z C Feng
- Neonatal Intensive Care Unit, Faculty of Pediatrics, the Seventh Medical Center of People's Liberation Army General Hospital, National Engineering Laboratory for Birth Defects Prevention and Control of Key Technology, Beijing Key Laboratory of Pediatric Organ Failure, Beijing 100700, China
| | - Q P Li
- Neonatal Intensive Care Unit, Faculty of Pediatrics, the Seventh Medical Center of People's Liberation Army General Hospital, National Engineering Laboratory for Birth Defects Prevention and Control of Key Technology, Beijing Key Laboratory of Pediatric Organ Failure, Beijing 100700, China
| |
Collapse
|
3
|
Cao JK, Li QP. [Application and progress of ultrasound monitoring in fluid management of preterm infants]. Zhonghua Er Ke Za Zhi 2021; 59:526-529. [PMID: 34102831 DOI: 10.3760/cma.j.cn112140-20210202-00098] [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)
- J K Cao
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou 510515, China
| | - Q P Li
- First Ward of Neonatology, Department of Pediatrics, the Seventh Medical Center of the People's Liberation Army General Hospital, Beijing 100700, China
| |
Collapse
|
4
|
Tabak F, Wang HS, Li QP, Ge XX, Wang F, Ji GZ, Miao L. Endoscopic retrograde cholangiopancreatography in elderly patients: Difficult cannulation and adverse events. World J Clin Cases 2020; 8:2988-2999. [PMID: 32775380 PMCID: PMC7385608 DOI: 10.12998/wjcc.v8.i14.2988] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 05/26/2020] [Accepted: 06/18/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Endoscopic retrograde cholangiopancreatography (ERCP) is a valuable therapeutic technique for pancreatobiliary diseases, and its application in the elderly is no longer limited. However, a higher incidence of procedure difficulty and periprocedural adverse events might be expected in elderly patients due to the presence of other medical disorders and the poor general condition of this population.
AIM To evaluate the incidence, causes, and management of difficult biliary cannulation during ERCP in elderly patients and the role of difficult cannulation as a risk factor for adverse events.
METHODS A total of 614 patients who underwent ERCP during the study period were prospectively studied and divided into two groups based on their age. One hundred and forty-six patients were aged 80 years or older and 468 patients were aged less than 80 years. The primary outcome measurements were cannulation difficulty, cannulation success rate, ERCP procedure time, and related adverse events.
RESULTS There was no difference in the incidence of difficult cannulation among the two groups (32.9% vs 34.4%, P = 0.765), as well as in the cannulation success rate (96.6% vs 96.8%, P = 0.54). The cannulation techniques were shown to be safe and efficient in achieving successful cannulation. Logistic regression analysis showed that patients aged 80 years or older were not associated with increased adverse events; however, difficult cannulation cases [adjusted odds ratio (AOR) = 3.478; 95% confidence interval (CI): 1.877-6.442; P < 0.001] and patients with Charlson Comorbidity Index ≥ 2 (AOR = 1.824; 95%CI: 0.993-3.349; P = 0.045) were more likely to develop adverse events. In contrast, other factors including age ≤ 65 (AOR = 3.460; 95%CI: 1.511-7.922; P = 0.003), female gender (AOR = 2.362; 95%CI=1.089-5.124; P = 0.030), difficult cannulation (AOR = 4.527; 95%CI: 2.078-9.860; P < 0.001), and patients with cholangitis (AOR = 3.261; 95%CI: 1.204-8.832; P = 0.020) were strongly associated with a higher rate of post-ERCP pancreatitis.
CONCLUSION Advanced age has not been proved to be a risk factor for difficult cannulation, and secondary cannulation techniques can be safely and efficaciously utilized in this group. Patients with a Charlson Comorbidity Index ≥ 2 and difficult cannulation are associated with an increased overall adverse events rate, while age ≥ 80 years is not.
Collapse
Affiliation(s)
- Fatema Tabak
- Institute of Digestive Endoscopy and Medical Centre for Digestive Disease, Second Affiliated Hospital of Nanjing Medical University, Nanjing 210011, Jiangsu Province, China
| | - Hui-Shan Wang
- Institute of Digestive Endoscopy and Medical Centre for Digestive Disease, Second Affiliated Hospital of Nanjing Medical University, Nanjing 210011, Jiangsu Province, China
| | - Quan-Peng Li
- Institute of Digestive Endoscopy and Medical Centre for Digestive Disease, Second Affiliated Hospital of Nanjing Medical University, Nanjing 210011, Jiangsu Province, China
| | - Xian-Xiu Ge
- Institute of Digestive Endoscopy and Medical Centre for Digestive Disease, Second Affiliated Hospital of Nanjing Medical University, Nanjing 210011, Jiangsu Province, China
| | - Fei Wang
- Institute of Digestive Endoscopy and Medical Centre for Digestive Disease, Second Affiliated Hospital of Nanjing Medical University, Nanjing 210011, Jiangsu Province, China
| | - Guo-Zhong Ji
- Institute of Digestive Endoscopy and Medical Centre for Digestive Disease, Second Affiliated Hospital of Nanjing Medical University, Nanjing 210011, Jiangsu Province, China
| | - Lin Miao
- Institute of Digestive Endoscopy and Medical Centre for Digestive Disease, Second Affiliated Hospital of Nanjing Medical University, Nanjing 210011, Jiangsu Province, China
| |
Collapse
|
5
|
Wang HS, Zhang W, Zhu HL, Li QP, Miao L. Long noncoding RNA SNHG6 mainly functions as a competing endogenous RNA in human tumors. Cancer Cell Int 2020; 20:219. [PMID: 32518528 PMCID: PMC7275348 DOI: 10.1186/s12935-020-01303-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Accepted: 05/28/2020] [Indexed: 02/06/2023] Open
Abstract
Increased expression of the small nucleolar RNA host gene 6 (SNHG6) has been reported in different cancers, such as hepatocellular carcinoma, colorectal cancer, and lung cancer. The high expression level of SNHG6 is associated with tumor progression and poor prognosis. This paper provides an overview of recent studies on the oncogenic role and potential clinical utilities of SNHG6. Upregulated SNHG6 arrests tumor cell cycle and reduces apoptosis but promotes migration, invasion, metastasis, epithelial-mesenchymal transition (EMT), and chemoresistance in tumors. Mechanically, SNHG6 primarily sponges tumor suppressor microRNA (miRNA), functioning as a competing endogenous RNA. Once sponged, miRNA is unable to degrade, silence, or hamper the translation of its downstream, mostly oncogenic genes, ultimately driving cancer-related processes. Thus, SNHG6 might serve as a biomarker for cancer diagnosis and prognosis.
Collapse
Affiliation(s)
- Hui-Shan Wang
- Nanjing Medical University, Nanjing, Jiangsu Province China
| | - Wen Zhang
- Nanjing Medical University, Nanjing, Jiangsu Province China
| | - Han-Long Zhu
- Nanjing Medical University, Nanjing, Jiangsu Province China
| | - Quan-Peng Li
- Medical Center for Digestive Diseases, The Second Affiliated Hospital of Nanjing Medical University, 121 Jiangjiayuan, Nanjing, 210011 Jiangsu Province China
| | - Lin Miao
- Nanjing Medical University, Nanjing, Jiangsu Province China.,Medical Center for Digestive Diseases, The Second Affiliated Hospital of Nanjing Medical University, 121 Jiangjiayuan, Nanjing, 210011 Jiangsu Province China
| |
Collapse
|
6
|
Deng XT, Tang SM, Wu PY, Li QP, Ge XX, Xu BM, Wang HS, Miao L. SP/NK-1R promotes gallbladder cancer cell proliferation and migration. J Cell Mol Med 2019; 23:7961-7973. [PMID: 30903649 PMCID: PMC6850939 DOI: 10.1111/jcmm.14230] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 01/24/2019] [Accepted: 01/27/2019] [Indexed: 12/28/2022] Open
Abstract
Aberrant substance P/neurokinin‐1 receptor (SP/NK‐1R) system activation plays a critical role in various disorders, however, little is known about the expression and the detailed molecular mechanism of the SP and NK‐1R in gallbladder cancer (GBC). In this study, we firstly analyzed the expression and clinical significance of them in patients with GBC. Then, cellular assays were performed to clarify their biological role in GBC cells. Moreover, we investigated the molecular mechanisms regulated by SP/NK‐1R. Meanwhile, mice xenografted with human GBC cells were analyzed regarding the effects of SP/NK1R complex in vivo. Finally, patient samples were utilized to investigate the effect of SP/NK‐1R. The results showed that SP and NK‐1R were highly expressed in GBC. We found that SP strongly induced GBC cell proliferation, clone formation, migration and invasion, whereas antagonizing NK‐1R resulted in the opposite effects. Moreover, SP significantly enhanced the expression of NF‐κB p65 and the tumor‐associated cytokines, while, Akt inhibitor could reverse these effects. Further studies indicated that decreasing activation of NF‐κB or Akt diminished GBC cell proliferation and migration. In consistent with results, immunohistochemical staining showed high levels of Akt, NF‐κB and cytokines in tumor tissues. Most importantly, the similar conclusion was obtained in xenograft mouse model. Our findings demonstrate that NK‐1R, after binding with the endogenous agonist SP, could induce GBC cell migration and spreading via modulation of Akt/NF‐κB pathway.
Collapse
Affiliation(s)
- Xue-Ting Deng
- Medical Center for Digestive Diseases, the Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Si-Min Tang
- Medical Center for Digestive Diseases, the Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Pei-Yao Wu
- Medical Center for Digestive Diseases, the Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Quan-Peng Li
- Medical Center for Digestive Diseases, the Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Xian-Xiu Ge
- Medical Center for Digestive Diseases, the Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Bo-Ming Xu
- Medical Center for Digestive Diseases, the Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Hui-Shan Wang
- Medical Center for Digestive Diseases, the Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Lin Miao
- Medical Center for Digestive Diseases, the Second Affiliated Hospital of Nanjing Medical University, Nanjing, China
| |
Collapse
|
7
|
Wang XS, Wang F, Li QP, Miao L, Zhang XH. Endoscopic retrograde cholangiopancretography in modified double tracks anastomosis with anastomotic stenosis. World J Gastrointest Endosc 2017; 9:145-148. [PMID: 28360977 PMCID: PMC5355762 DOI: 10.4253/wjge.v9.i3.145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2016] [Revised: 12/13/2016] [Accepted: 01/14/2017] [Indexed: 02/05/2023] Open
Abstract
A 63-year-old man presented at our hospital with right upper abdomen pain and fever for 4 d. The patient’s magnetic resonance cholangiopancreatography revealed dilated common bile duct and choledocholithiasis. In his past history, he received proximal gastrectomy and modified double tracks anastomosis. Endoscopic retrograde cholangiopancretography in modified double tracks anastomosis, especially accompanied with anastomotic stenosis, has been rarely reported. In the present case, the duodenoscope was successfully introduced over the guidewire and the stone taken out using a basket. The patient had good palliation of his symptoms after removal of the stone.
Collapse
|
8
|
Zou Y, Guo JJ, Li QP, Zuo DH, Liu JS, Guo YD, Yan J, Zha L, Cai JF, Lan LM. Genetic Polymorphisms of 21 STR Loci in Hunan Province-based Han Population. Fa Yi Xue Za Zhi 2016; 32:356-362. [PMID: 29205006 DOI: 10.3969/j.issn.1004-5619.2016.05.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Indexed: 11/18/2022]
Abstract
OBJECTIVES To investigate the genetic polymorphisms of 21 short tandem repeat (STR) loci (D3S1358, D13S317, D7S820, D16S539, Penta E, D2S441, TPOX, TH01, D2S1338, CSF1PO, Penta D, D10S1248, D19S433, vWA, D21S11, D18S51, D6S1043, D8S1179, D5S818, D12S391 and FGA). METHODS A total of 560 blood samples were collected from unrelated healthy individuals of Han population in Hunan Province. Chelex-100 extraction method was applied to the extraction of genomic DNA, and an AGCU EX22 Kit and 9700 STR amplification was used in amplification reactions. The products were separated and analyzed on 310 Genetic Analyzer. RESULTS A total of 248 alleles were observed, the allelic frequencies ranging from 0.001 to 0.518. Observation of genotype distributions for each locus showed no deviations from Hardy-Weinberg equilibrium except Penta E (P=0.023). The combined power of discrimination, combined power of exclusion, and combined matching probability of the 21 STR loci were approximately 0.999 999 999 999 999 999 999 999 8, 0.999 999 998, and 1.36×10⁻²⁵, respectively. CONCLUSIONS The 21 STR loci show high polymorphisms in the Han population, which can provide valuable data and a theoretical basis for forensic individual identification and paternity testing.
Collapse
Affiliation(s)
- Y Zou
- Department of Forensic Science, School of Basic Medical Sciences, Central South University, Changsha 410013, China
| | - J J Guo
- Department of Forensic Science, School of Basic Medical Sciences, Central South University, Changsha 410013, China
| | - Q P Li
- Xiangya School of Medicine, Central South University, Changsha 410013, China
| | - D H Zuo
- Xiangya School of Medicine, Central South University, Changsha 410013, China
| | - J S Liu
- Department of Internal Medicine, Affiliated Hospital of Inner Mongolia University for Nationalities, Tongliao 028000, China
| | - Y D Guo
- Department of Forensic Science, School of Basic Medical Sciences, Central South University, Changsha 410013, China
| | - J Yan
- Department of Forensic Science, School of Basic Medical Sciences, Central South University, Changsha 410013, China
| | - L Zha
- Department of Forensic Science, School of Basic Medical Sciences, Central South University, Changsha 410013, China
| | - J F Cai
- Department of Forensic Science, School of Basic Medical Sciences, Central South University, Changsha 410013, China
| | - L M Lan
- Department of Forensic Science, School of Basic Medical Sciences, Central South University, Changsha 410013, China
| |
Collapse
|
9
|
Yang YH, Li QP. [A review: the achievement and challenge of artificial placenta]. Zhonghua Er Ke Za Zhi 2016; 54:550-553. [PMID: 27412752 DOI: 10.3760/cma.j.issn.0578-1310.2016.07.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
|
10
|
Miao L, Li QP, Zhu MH, Ge XX, Yu H, Wang F, Ji GZ. Endoscopic transpancreatic septotomy as a precutting technique for difficult bile duct cannulation. World J Gastroenterol 2015; 21:3978-3982. [PMID: 25852284 PMCID: PMC4385546 DOI: 10.3748/wjg.v21.i13.3978] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Revised: 10/10/2014] [Accepted: 11/11/2014] [Indexed: 02/06/2023] Open
Abstract
AIM: To evaluate the technique of transpancreatic septotomy (TS) for cannulating inaccessible common bile ducts in endoscopic retrograde cholangiopancreatography (ERCP).
METHODS: Between May 2012 and April 2013, 1074 patients were referred to our department for ERCP. We excluded 15 patients with previous Billroth II gastrectomy, Roux-en-Y anastomosis, duodenal stenosis, or duodenal papilla tumor. Among 1059 patients who underwent ERCP, there were 163 patients with difficult bile duct cannulation. Pancreatic guidewire or pancreatic duct plastic stent assistance allowed for successful ERCP completion in 94 patients. We retrospectively analyzed clinical data from 69 failed patients (36 transpancreatic septotomies and 33 needle-knife sphincterotomies).
RESULTS: Of the 69 patients who underwent precut papillotomy, common bile duct cannulation was successfully achieved in 67. The success rates in the TS and needle knife sphincterotomy (NKS) groups were 97.2% (35/36) and 96.9% (32/33), respectively, which were not significantly different (P > 0.05). Complications occurred in 11 cases, including acute pancreatitis (n = 6), bleeding (n = 2), and cholangitis (n = 3). The total frequency of complications in the TS group was lower than that in the NKS group (8.3% vs 24.2%, P < 0.05).
CONCLUSION: Pancreatic guidewire or pancreatic duct plastic stent assistance improves the success rate of selective bile duct cannulation in ERCP. TS and NKS markedly improve the success rate of selective bile duct cannulation in ERCP. TS precut is safer as compared with NKS.
Collapse
|
11
|
Wu SP, Qin ZZ, Xiao TZ, Li QP, Lu BB, Jing LJ, Wang J, Zhu RL. Cryopreservation of gemmae of Marchantia polymorpha L. (Marchantiophyta, Marchantiaceae) without prior pretreatment. Cryo Letters 2015; 36:91-96. [PMID: 26017297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
BACKGROUND Successful cryopreservation of gametophytic material of bryophytes requires pretreatment with sucrose or abscisic acid. Compared to gametophyte materials, spore and gemmae cryopreservation may be more efficient, simple and stable systems for storing large amounts of genetic diversity of bryophytes within a small space. However, there has still been no attempt at cryopreserving bryophyte gemmae. OBJECTIVE The aim of this study is to determine whether bryophyte gemmae with differing levels of desiccation tolerance could survive and germinate after cryopreservation without prior encapsulation and pretreatment. MATERIALS AND METHODS Gemmae of Marchantia polymorpha L. were dried with silica gel for different times and then rapidly cooled in liquid nitrogen. RESULTS The germination level of fresh gemmae was 95 % After 3 h predrying and 1 d in LN, germination was 68 % and was still up to 59 % after storage for 75 days. CONCLUSION We conclude that the natural desiccation tolerance of bryophyte gemmae permits cryopreservation without prior pretreatment other than drying.
Collapse
Affiliation(s)
- S P Wu
- Bryology Laboratory, School of Life Science, East China Normal University, 500 Dongchuan Road, Shanghai China
| | - Z Z Qin
- Bryology Laboratory, School of Life Science, East China Normal University, 500 Dongchuan Road, Shanghai China
| | - T Z Xiao
- Bryology Laboratory, School of Life Science, East China Normal University, 500 Dongchuan Road, Shanghai China
| | - Q P Li
- Bryology Laboratory, School of Life Science, East China Normal University, 500 Dongchuan Road, Shanghai China
| | - B B Lu
- Bryology Laboratory, School of Life Science, East China Normal University, 500 Dongchuan Road, Shanghai China
| | - L J Jing
- Bryology Laboratory, School of Life Science, East China Normal University, 500 Dongchuan Road, Shanghai China
| | - J Wang
- Bryology Laboratory, School of Life Science, East China Normal University, 500 Dongchuan Road, Shanghai China
| | - R L Zhu
- Bryology Laboratory, School of Life Science, East China Normal University, 500 Dongchuan Road, Shanghai China
| |
Collapse
|
12
|
Wang F, Yu H, Zhu MH, Li QP, Ge XX, Nie JJ, Miao L. Gastrotracheal fistula: Treatment with a covered elf-expanding Y-shaped metallic stent. World J Gastroenterol 2015; 21:1032-1035. [PMID: 25624743 PMCID: PMC4299322 DOI: 10.3748/wjg.v21.i3.1032] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Revised: 06/27/2014] [Accepted: 07/25/2014] [Indexed: 02/06/2023] Open
Abstract
A 67-year-old man had a sev-ere cough and pulmonary infection for 1 wk before seeking evaluation at our hospital. He had undergone esophagectomy with gastric pull-up and radiotherapy for esophageal cancer 3 years previously. After admission to our hospital, gastroscopy and bronchoscopy revealed a fistulous communication between the posterior tracheal wall near the carina and the upper residual stomach. We measured the diameter of the trachea and bronchus and determined the site and size of the fistula using multislice computed tomography and gastroscopy. A covered self-expanding Y-shaped metallic stent was implanted into the trachea and bronchus. Subsequently, the fistula was closed completely. The patient tolerated the stent well and had good palliation of his symptoms.
Collapse
|
13
|
Chen X, Li QP, Ji GZ, Ge XX, Zhang XH, Zhao XY, Miao L. Two-year follow-up for 45 patients with achalasia who underwent peroral endoscopic myotomy. Eur J Cardiothorac Surg 2014; 47:890-6. [PMID: 25193955 DOI: 10.1093/ejcts/ezu320] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [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: 04/02/2014] [Accepted: 06/19/2014] [Indexed: 12/23/2022] Open
Abstract
OBJECTIVES Achalasia is an oesophageal disorder characterized by abnormalities of peristalsis and impaired swallowing-induced relaxation. The therapeutic approach at present remains palliative. Peroral endoscopic myotomy (POEM) is thought to be less invasive and to maintain the function of the lower oesophageal sphincter postoperatively. However, the effects of POEM still need to be evaluated and understood. METHODS We analysed the outcome for 45 achalasia patients who underwent POEM in our centre, described the details of surgery and evaluated the effects by 4 s integrated relaxation pressure (4s-IRP). All patients were followed up for at least 2 years and were assessed by the dysphagia score, the Eckardt score, oesophageal manometry and the gastro-oesophageal reflux disease (GERD) Q-questionnaire. According to the new Chicago classification of oesophageal motility using high-resolution manometry, the patients were diagnosed and classified into types I, II and III. RESULTS The average age of the patients was 46.32 ± 19.04 years (range 26-72 years), and the ratio of women to men was 1.81. All patients were suffering from dysphagia; more than half of them experienced regurgitation. The data revealed that POEM considerably reduced the 4s-IRP, dysphagia score and Eckardt score postoperatively (all P < 0.05). The patients with type III achalasia had higher values of 4s-IRP than the others (type I, P = 0.025; type II, P = 0.022) before treatment and at 3 months after treatment (type I, P = 0.028; type II, P = 0.047). In type I patients, GERD symptoms were more likely to appear at 24 months after POEM than in type II and III patients (P = 0.001 and P < 0.001, respectively). CONCLUSIONS Peroral endoscopic myotomy provides definite relief of symptoms in these patients with achalasia and offers them long-term therapeutic benefit. Considering the risks of surgery, we believe that POEM is a better choice than surgery for achalasia patients and carries lower risk. However, our study is a preliminary exploration; therefore, larger-scale studies are needed for further research on POEM.
Collapse
Affiliation(s)
- Xia Chen
- The Medical Center for Digestive Diseases, the Second Affiliated Hospital of Nanjing Medical University, Digestive Endoscopy Institute, Nanjing Medical University, Nanjing, China
| | - Quan-Peng Li
- The Medical Center for Digestive Diseases, the Second Affiliated Hospital of Nanjing Medical University, Digestive Endoscopy Institute, Nanjing Medical University, Nanjing, China
| | - Guo-Zhong Ji
- The Medical Center for Digestive Diseases, the Second Affiliated Hospital of Nanjing Medical University, Digestive Endoscopy Institute, Nanjing Medical University, Nanjing, China
| | - Xian-Xiu Ge
- The Medical Center for Digestive Diseases, the Second Affiliated Hospital of Nanjing Medical University, Digestive Endoscopy Institute, Nanjing Medical University, Nanjing, China
| | - Xiu-Hua Zhang
- The Medical Center for Digestive Diseases, the Second Affiliated Hospital of Nanjing Medical University, Digestive Endoscopy Institute, Nanjing Medical University, Nanjing, China
| | - Xiang-Yang Zhao
- The Digestive Department, Lishui County People's Hospital, Nanjing, Jiangsu, China
| | - Lin Miao
- The Medical Center for Digestive Diseases, the Second Affiliated Hospital of Nanjing Medical University, Digestive Endoscopy Institute, Nanjing Medical University, Nanjing, China
| |
Collapse
|
14
|
Li QP, Ge XX, Ji GZ, Fan ZN, Zhang FM, Wang Y, Miao L. Endoscopic retrieval of 28 foreign bodies in a 100-year-old female after attempted suicide. World J Gastroenterol 2013; 19:4091-4093. [PMID: 23840158 PMCID: PMC3703200 DOI: 10.3748/wjg.v19.i25.4091] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Revised: 03/31/2013] [Accepted: 05/18/2013] [Indexed: 02/06/2023] Open
Abstract
Foreign body ingestion is a common emergency situation in children with one or a few objects having been ingested. Here we report our experience using endoscopic retrieval in a female centenarian with dyspnea and foreign bodies in the esophagus. She attempted suicide by swallowing 26 coins and two other foreign bodies. A gastroscope was used to remove all foreign bodies in the lower esophagus. In total, 26 coins, one ferrous ring and one cylindrical plastic object were retrieved. To our knowledge, this is the first clinical report on retrieval of so many foreign bodies in a single case.
Collapse
|
15
|
Dong XL, Xu PF, Miao C, Fu ZY, Li QP, Tang PY, Wang T. Hypoxia decreased chemosensitivity of breast cancer cell line MCF-7 to paclitaxel through cyclin B1. Biomed Pharmacother 2011; 66:70-5. [PMID: 22264882 DOI: 10.1016/j.biopha.2011.11.016] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2011] [Accepted: 11/01/2011] [Indexed: 11/28/2022] Open
Abstract
Hypoxia, frequently found in the center of solid tumors, may lead to enhance the production of key factor in cell survival, invasion, angiogenesis and loss of apoptosis. The low oxygen tension in hypoxic tumors is also known to interfere with the efficacy of chemotherapy, but the underlying mechanisms are not very clear. Paclitaxel (PTX) is an active agent used in breast cancer chemotherapy, which disturbs microtubule dynamics and impairs the transition of cells from metaphase to anaphase in mitosis, leading to cell death by apoptosis. In the present study, we try to determine whether hypoxia can decrease the chemosensitivity of human breast carcinoma cells to PTX and elucidate the underlying mechanism. We found that hypoxia could decrease PTX-induced cell death and G(2)/M arrest. Furthermore, our results showed that hypoxia inhibit PTX-induced soluble tubulin polymerized. In addition, we also found hypoxia could suppress PTX-induced cell cycle protein-cyclin B1 expression in MCF-7 cells. To further investigate whether the inhibitory effect of hypoxia on PTX-induced cell death is mediated by decreasing levels of cyclin B1, cyclin B1-transfected MCF-7 cells were used under hypoxic condition. The data showed that the hypoxia-based decreasing chemosensitivity of breast cancer cells to PTX was reversed by cyclin B1. We also found that overexpression of cyclin B1 could significantly increase the sensitivity of MCF-7 cells to PTX by stimulating soluble polymerized tubulin. Overall, hypoxia decreases cyclin B1, which could in turn reverse hypoxia-induced decreasing chemosensitivity to PTX in breast cancer cell line MCF-7.
Collapse
Affiliation(s)
- X L Dong
- Department of Internal Medicine of the Second Affiliated Hospital, Medical School of Xi'an Jiao Tong University, Xi'an, China
| | | | | | | | | | | | | |
Collapse
|
16
|
Abstract
BACKGROUND Vascular dementia (VD) is a syndrome or diagnosis that has different causes and clinical manifestations relating to several different vascular mechanisms and changes in the brain. Some traditional Chinese herbal medicines were developed for treating VD. DH: Yizhi capsule is one such herbal concoction which is reported to improve clinical symptoms significantly. The efficacy and adverse effects of Yizhi capsule need to be reviewed systematically and assessed critically to inform clinical practice and guide the continued search for new treatment regimens. OBJECTIVES To assess the effectiveness and possible adverse events of 'Yizhi capsule' in treating vascular dementia. SEARCH STRATEGY The Cochrane Dementia and Cognitive Improvement Group's Specialised Register was searched on 18 September 2006 using the terms yi-zhi, "yi zhi" and yizhi. This database contains trial references from major health care databases and ongoing trial database and is up to date. In addition the review authors searched a variety of Chinese databases. SELECTION CRITERIA Randomised, placebo controlled trials in which patients with vascular dementia were treated with 'Yizhi capsule' were included. DATA COLLECTION AND ANALYSIS Two authors independently assessed trial quality and extracted data. We telephoned study authors for missing information as to whether treatment allocation was randomised and other methodological details. MAIN RESULTS No studies were found that met the inclusion criteria. We identified nine references to trials which included the term 'Yizhi capsule' in the description of the interventions. Two study authors were contacted by telephone and we discovered that the allocation methods they had used were not actually randomised. Four references were describing the same study. Three studies were excluded because 'positive drugs' were used as a control. AUTHORS' CONCLUSIONS There is no evidence from randomised controlled trials to support or proscribe against the use of 'Yizhi capsule' as a treatment for vascular dementia.
Collapse
Affiliation(s)
- T X Wu
- West China Hospital, Sichuan University, Chinese Cochrane Centre, Chinese EBM Centre, No. 37, Guo Xue Xiang, Chengdu, Sichuan, China, 610041.
| | | | | |
Collapse
|
17
|
Li QP, Lu ZA, Rao MR. [Depressive effect of tetrandrine on collagen synthesis in vascular smooth muscle cells]. Yao Xue Xue Bao 2001; 36:481-4. [PMID: 12585075] [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: 02/28/2023]
Abstract
AIM To clarify whether collagen deposition and collagen synthesis are increased in renovascular hypertensive rats (RHR) and whether these are affected by treatment with tetrandrine (Tet). METHODS Collagen deposition was detected by electron microscope and evaluated by the amount of hydroxyproline in aorta of sham-operated rats (Sham), renovascular hypertensive rats (RHR), and Tet treated RHR. The aortic vascular smooth muscle cells (AVSMCs) were isolated and cultured. The collagen synthesis in cultured AVSMCs was detected by [3H]-proline incorporation. RESULTS The ultrastructure of aorta suggests that AVSMCs in RHR had been transferred from contractile phenotype to synthetic phenotype. Compared with sham-operated rats, the hydroxyproline content in aorta was increased by 36.6% in RHR, while it was reduced by 18.7% in Tet treated RHR (P < 0.01, vs RHR). Tet (0.1-10 mumol.L-1) treatment in vitro induced a concentration dependent depression [3H]-proline incorperation stimulated by NE or Ang II in AVSMCs from either Sham or RHR. CONCLUSION The depressive effects of tetrandrine on collagen synthesis and deposition in arteries may contribute to the regression of vascular remodeling.
Collapse
Affiliation(s)
- Q P Li
- Department of Cardiovascular Pharmacology, Nanjing Medical University, Nanjing 210029, China.
| | | | | |
Collapse
|
18
|
Liang GD, Li L, Zhou GL, Fu SH, Li QP, Li FS, He HH, Jin Q, He Y, Chen BQ, Hou YD. Isolation and complete nucleotide sequence of a Chinese Sindbis-like virus. J Gen Virol 2000; 81:1347-51. [PMID: 10769078 DOI: 10.1099/0022-1317-81-5-1347] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Infection with alphaviruses is common in the Chinese population. Here we report the isolation of a Sindbis-like virus from a pool of Anopheles mosquitoes collected in Xinjiang, China during an arbovirus survey. This virus, designated XJ-160, rapidly produced cytopathic effects on mosquito and hamster cells. In addition, it was lethal to neonatal mice if inoculated intracerebrally. Serologically, XJ-160 reacted with and was neutralized by an anti-Sindbis antibody. Anti-XJ-160 antibodies were found in several cohorts of Chinese subjects. The complete 11626-base nucleotide sequence of XJ-160 was determined. XJ-160 has diverged significantly from the prototype Sindbis virus, with an 18% difference in nucleotide sequence and an 8.6% difference in amino acids; there are 11 deletions and 2 insertions, involving 99 nucleotides in total. XJ-160 is most closely linked to Kyzylagach virus isolated in Azerbaijan. Both belong to the African/European genetic lineage of Sindbis virus, albeit more distantly related to other members.
Collapse
Affiliation(s)
- G D Liang
- State Key Laboratory for Molecular Virology and Genetic Engineering, Institute of Virology, Chinese Academy of Preventive Medicine, Beijing, People's Republic of China
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Sun AY, Li DX, Wang YL, Li QP. Restraint stress changes heart sensitivity to arrhythmogenic drugs. Zhongguo Yao Li Xue Bao 1995; 16:455-9. [PMID: 8701768] [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: 02/01/2023]
Abstract
AIM To study the effects of acute restraint stress on ventricular electric stability (VES) and its mechanisms of action. METHODS VES was evaluated both in vivo and in vitro by the changes of arrhythmogenic responses to icv or ip aconitine in rats and iv BaCl2 or adrenaline in rabbits following restraint stress for different durations. Pretreatments and the assay of heart-specific enzymes were made. RESULTS The heart sensitivity to these drugs was promoted after stress for 2 h, but obtunded after stress for 8 h (the latency of ventricular arrhythmia to icv aconitine was shortened from 4.1 +/- 0.9 min in control rats to 2.9 +/- 0.9 min after stress for 2 h, P < 0.05; but prolonged to 9.3 +/- 3.8 min after stress for 8 h, P < 0.05). In Langendorff heart, the changes of VES induced by stress were similar to those in vivo, but to lesser degree. Pretreatment with adrenalectomy inhibited the descending phase of VES, while pretreatment with both aminophylline and vagotomy remarkably depressed the ascending phase at 8 h. In addition, the serum activities of lactate dehydrogenase (LDH), creatine kinase (CK), and aspartate aminotransferase and their isozymes, LDH1 and CK-MB, were elevated at 2 h, and rose continuously at 8 h. CONCLUSION Acute restraint stress causes biphasic changes of VES. The initial decrease of VES was related to adrenal catecholamine release, whereas the following increase of VES was ascribed to adaptive decrease of cAMP and vagal activation. The changes of VES did not always parallel the injury of heart.
Collapse
Affiliation(s)
- A Y Sun
- Department of Pharmacology, Nanjing Medical University, China
| | | | | | | |
Collapse
|
20
|
Li QP, Xie XC. Erratum: Transport of one-dimensional interacting fermions through a barrier. Phys Rev B Condens Matter 1994; 50:5021. [PMID: 9976839 DOI: 10.1103/physrevb.50.5021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
21
|
|
22
|
Li QP, Joynt R. Metal-insulator transition and magnetic ordering in Hubbard models near the Nagaoka limit. Phys Rev B Condens Matter 1994; 49:1632-1641. [PMID: 10010952 DOI: 10.1103/physrevb.49.1632] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
23
|
Li QP, Koltenbah BE, Joynt R. Mixed s-wave and d-wave superconductivity in high-Tc systems. Phys Rev B Condens Matter 1993; 48:437-455. [PMID: 10006795 DOI: 10.1103/physrevb.48.437] [Citation(s) in RCA: 75] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
24
|
Li QP, Joynt R. Mott-Hubbard metal-insulator transition in Hubbard models at high total spin. Phys Rev B Condens Matter 1993; 47:3979-3982. [PMID: 10006511 DOI: 10.1103/physrevb.47.3979] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
25
|
Li QP, Joynt R. Nuclear relaxation in the superconducting state of YBa2Cu3O7: Evidence for an s+id state. Phys Rev B Condens Matter 1993; 47:530-533. [PMID: 10004480 DOI: 10.1103/physrevb.47.530] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
26
|
Li QP, Liu TP. Frequency-dependent depression of Vmax in K(+)-depolarized guinea pig papillary muscle by tetrandrine. Zhongguo Yao Li Xue Bao 1992; 13:407-11. [PMID: 1300041] [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: 12/26/2022]
Abstract
The effect of tetrandrine (Tet), a calcium antagonist, on the maximal upstroke velocity (Vmax) of depolarization in K(+)-depolarized guinea pig papillary muscles was studied by standard microelectrode method with computer. The results showed that: (1) the resting block of Tet on Vmax was concentration dependent; (2) the drug (50 or 100 mumol.L-1) caused a marked frequency-dependent block of Vmax, which accounted for 65 +/- 8% of total block at a concentration of 100 mumol.L-1 and the pacing frequency of 0.3 Hz; (3) the recovery kinetics of Vmax could be characterized as a biexponential function, of which the second phase was prolonged by the drug; (4) compared with verapamil, nitrendipine, and diltiazem, the above-mentioned effects of Tet on Vmax were similar to those of diltiazem. These results suggest that Tet can block calcium channel in both frequency-dependent and frequency-independent manner, mainly the former.
Collapse
Affiliation(s)
- Q P Li
- Department of Pharmacology, Nanjing Medical College, China
| | | |
Collapse
|
27
|
Li QP, Joynt R. Elementary excitations in one-dimensional quantum wires: Exact equivalence between the random-phase approximation and the Tomonaga-Luttinger model. Phys Rev B Condens Matter 1992; 45:13713-13716. [PMID: 10001467 DOI: 10.1103/physrevb.45.13713] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
28
|
Li QP. Elementary excitation spectrum of one-dimensional electron systems in confined semiconductor structures: Finite magnetic field. Phys Rev B Condens Matter 1991; 44:6277-6283. [PMID: 9998492 DOI: 10.1103/physrevb.44.6277] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
29
|
|
30
|
Li QP. Elementary excitation spectrum of one-dimensional electron systems in confined semiconductor structures: Zero magnetic field. Phys Rev B Condens Matter 1991; 43:11768-11786. [PMID: 9996949 DOI: 10.1103/physrevb.43.11768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
31
|
Li QP, Karraï K, Yip SK, Drew HD. Electrodynamic response of a harmonic atom in an external magnetic field. Phys Rev B Condens Matter 1991; 43:5151-5154. [PMID: 9997896 DOI: 10.1103/physrevb.43.5151] [Citation(s) in RCA: 54] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
32
|
Xie XC, Li QP. Density of states and thermodynamic properties of a two-dimensional electron gas in a strong external magnetic field. Phys Rev B Condens Matter 1990; 42:7132-7147. [PMID: 9994840 DOI: 10.1103/physrevb.42.7132] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
33
|
Zhang WC, Li HZ, Li QP. [Study and use of the spinal column scale]. Zhonghua Wai Ke Za Zhi 1985; 23:213-4, 253. [PMID: 4017769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|