1.Silicon nanowire field effect transistor biosensors for protein detection
Chinese Journal of Tissue Engineering Research 2017;21(26):4246-4251
BACKGROUND: Silicon nanowire field effect transistor electronic biosensors (SiNW-FETs) have attracted enormous interest in the biosensing field and have made rapid progress in protein detection.OBJECTIVE: To review the progress in protein detection by using silicon nanowire biosensors.METHODS: PubMed, CNKI, Baidu Scholar, Google Scholar were searched by the first author for the articles related to protein detection, microfluidic channels and silicon nanowire biosensors published from 2005 to 2016.RESULTS AND CONCLUSION: SiNW-FETs, with the merits of high sensitivity, target selectivity, real-time recording and label-free character, have been confirmed to have broad application prospects.
2.Question Answering System Based on the Big Data of Electronic Medical Records (EMR)
Shengze ZHANG ; Qingyang WANG ; Kehong YUAN
Journal of Medical Informatics 2017;38(3):7-11,39
Based on the big data of Electronic Medical Records (EMR),information retrieval and the deep learning method,an auxiliary diagnosis Question Answering (QA) system is designed.The paper introduces the design of general framework,EMR database,value network and policy-based network of the system,provides the system operation process.This system can not only help patients to examine their conditions independently,but also provide reference for doctors when they make the diagnosis and treatment schemes.
3.The method of removing breathing baseline in pulse wave signal.
Qingyang HAN ; Bingyu LI ; Xiaodong WANG
Chinese Journal of Medical Instrumentation 2014;38(1):19-22
A method which combines empirical mode decomposition with wavelet transform is employed to remove breathing baseline draft from pulse wave signal. First of all, this method decomposes pulse wave signal into several intrinsic mode functions and judges the intrinsic mode function which contains the information of breathing baseline draft. And then wavelet transform is used to decompose these intrinsic mode functions, and the detail coefficients representing breathing baseline draft are set into zero. At last, the signal is rebuilt. This can realize removing breathing baseline draft. A self-developed measurement device was used to obtain the pulse wave signal for validating, and AC-DC modulation ratio value was adopted to evaluate the effect. The results showed that this method could effectively remove breathing baseline draft from pulse wave signal.
Algorithms
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Oximetry
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instrumentation
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methods
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Respiration
4.The application of ileocecum interposition in alimentary reconstruction
Chinese Journal of Gastrointestinal Surgery 2001;4(1):25-27
Objective To evaluate the clinical application of ileocecum interposition graft as gastric replacement in alimentary reconstuction. Methods Various methods including video-assisted gastroscopy, esophageal manometry, 24 h pH esophageal monitoring, total bile acids (TBA) in gastric fluid, barium meal examination of upper alimentary tract, quality of life (QOL) were used in stomach function monitoring on 8 cases after such reconstruction. Meanwhile, comparisons were performed with 15 cases after reconstruction of stomach with jejunum (RSJ) or 15 normal people. Results The ileocecal valve could replace the cardia and was possessed of good anti-gastroesephageal reflux capability. The ileocecum and ascending colon had sufficient capacity and was a good container. The retained pyloras proved efficient in anti-duodenogastric reflux and in lengthening gastric emptying time. Quality of life after operatin was satisfactory. Conclusion This surgical procedure is an ideal method of alimentary reconstruction which is close to physiological status.
5.The application of ileocecum interposition in alimentary reconstruction
Chinese Journal of Gastrointestinal Surgery 2001;4(1):25-27
Objective To evaluate the clinical application of ileocecum interposition graft as gastric replacement in alimentary reconstuction. Methods Various methods including video-assisted gastroscopy, esophageal manometry, 24 h pH esophageal monitoring, total bile acids (TBA) in gastric fluid, barium meal examination of upper alimentary tract, quality of life (QOL) were used in stomach function monitoring on 8 cases after such reconstruction. Meanwhile, comparisons were performed with 15 cases after reconstruction of stomach with jejunum (RSJ) or 15 normal people. Results The ileocecal valve could replace the cardia and was possessed of good anti-gastroesephageal reflux capability. The ileocecum and ascending colon had sufficient capacity and was a good container. The retained pyloras proved efficient in anti-duodenogastric reflux and in lengthening gastric emptying time. Quality of life after operatin was satisfactory. Conclusion This surgical procedure is an ideal method of alimentary reconstruction which is close to physiological status.
6.Clinical Effect Addition and Subtraction Therapy of Si Junzitang Combined with Simotang to Outlet Obstructive Constipation After Stapled Trans-anal Rectal Resection
Qin-guang ZHANG ; Xiong-fei YANG ; Hao-hua WANG
Chinese Journal of Experimental Traditional Medical Formulae 2020;26(19):183-188
Objective:To observe clinical effect of addition and subtraction therapy of Si Junzitang combined with Simotang to outlet obstructive constipation (OOC) after stapled trans-anal rectal resection (STARR). Method:One hundred and twenty-four patients were randomly divided into control group (62 cases) and observation group (62 cases) by random number table. Patients in control group got Qirong Ruichang oral liquid, 20 mL/time, 3 times/day. After operation, patients in observation group got addition and subtraction therapy of Si Junzitang combined with Simotang, 1 dose/day. And courses of treatment in two groups were 4 weeks, and 8 weeks' follow-up was recorded. Before the operation and at the second and fourth week after treatment, and the eighth week of follow-up, scores of main symptoms of constipation and Longo ODS were graded. Before the operation and at the fourth week after treatment, levels of superoxide dismutase (SOD), malondialdehyde (MDA), constipation patients quality of life self-assessment scale (PAC-QOL), anorectal pressure, anal resting pressure (ARP), maximum anal systolic pressure (MSP), rectal defecation pressure (RSP), FSV, CRS and MTV were recorded. And incidence, recurrence, normal defecation, satisfaction at the fourth week after the operation and safety were evaluated. Result:The clinical rate in observation group was better than that in control group (
7.Research Progress and Ethical Issues of Brain Organoids
Caixia FANG ; Zhenyun WANG ; Xiaodong BAI
Chinese Medical Ethics 2023;36(12):1330-1335
Organoids are three-dimensional (3D) biological structures constructed in vitro by stem cells, which partially mimic the function of real organs. Brain organoids are an extremely important branch of organoid research. This technology can differentiate pluripotent stem cells into the required cell types in a 3D culture environment, and self-assemble into structural bodies, but it is currently unable to fully replicate the structural and physiological features of the real human brain. The maturity of brain organoids may form consciousness, which poses ethical issues such as determining moral status and informed consent in brain organoids research. This paper elaborated on the research progress and future development direction of brain organoids, and proposed multidimensional governance strategies for ethical issues faced in brain organoids research from the perspectives of ethical principles, ensuring public informed consent, and legal supervision. By exploring the above issues, reference will be provided for formulating ethical principles to guide the research and application of brain organoids in the future.
8.Analysis of Genomic Landscape in Patients with Acute Myeloid Leukemia.
Sheng-Mei WANG ; Hong-Jun ZHENG ; Ying TIAN ; Jian-Mei ZHANG ; Jin-Hua YAO
Journal of Experimental Hematology 2020;28(3):797-801
OBJECTIVE:
To investigate the gene mutation occurved in AML patients with 29 kinds of fusion genes and 51 kinds of tumor gene.
METHODS:
Next-generation sequencing (NGS) was used to detected the 49 kinds of targeted gene. FLT3 internal tandem duplication (FLT3-ITD), CALR, NPM1 and CEBPA mutation were detected by DNA-based PCR and Sanger sequencing. Twenty-nine kinds of fusion genes were dected by multiplex nested RT-PCR.
RESULTS:
The total gene mutation rate was 91% (109/121) in all the 121 patients. On average, 2.1 mutated genes per patient were identified, among these 121 patients, coexistence of ≥ 3 mutations was frequent (34.7%). The most commonly mutated genes were NRAS (23.96%, n=29), followed by NPM1 (14.04%, n=17), CEBPA double mutations (14.04%, n=17), KRAS (11.57%, n=14),FLT3-ITD (10.74%, n=13), CSF3R (10.74%, n=13), TET2 (9.92%, n=12) and IDH1 (9.1%, n=11). Overall, fusion genes were detected in 47 (37.3%) patients, including AML/ETO (n=12), CBFβ/MYH11 (n=11), PML/RARa (n=12), MLL rearranagement realated mutation MLL-X (n=10). TLS/ERG (n=1) and DEK/CAN (n=1) in an order of decreasing frequency. Patients with normal karyotype (NK)- AML exhibited more mutations in CEBPA, NPM1, TET2, RUNX1 and IDH1, comparing with abnormal karyotype patients. KRAS mutation in abnormal kayotype patients was significantly higher than that in normal kayotype patients (P=0.014). TP53 mutations were predominantly associated with complex cytogenetics (P=0.199). KRAS mutations were more frequent in core binding factor (CBF) acute myeloid leukemia (AML) and 11q23/MLL rearrangement leukemia, compared with NK-AML (P=0.006 and 0.003, respectively). KIT mutations predominated in CBF-AML (P=0.006). JAK2V617F mutations were detected in two patients and co-occurred with AML-ETO fusions.
CONCLUSION
At least one mutation is observed in more than 90% patients. On average, more than 2 mutated genes per patient are identified. Some gene mutations are associated with gene rearrangement.
Chromosomal Proteins, Non-Histone
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Genomics
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High-Throughput Nucleotide Sequencing
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Humans
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Leukemia, Myeloid, Acute
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Mutation
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Oncogene Proteins
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Poly-ADP-Ribose Binding Proteins
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Prognosis
9.Isolation, culture and identification of rabbit bone marrow mesenchymal stem cells
Qingyang LIU ; Yi SHI ; Huidong WANG ; Chenliang DENG
Chinese Journal of Tissue Engineering Research 2008;12(51):10113-10116
BACKGROUND: Both density gradient centrifugation and adherence method arc frequently used to isolate bone marrow mesenchymal stem cells (BMSCs).OBJECTIVE: To investigate the approaches to isolate, culture and identify the rabbit BMSCs in vitro by the combination of den,ity gradient centrifugation and adherence method. DESIGN, TIME AND SETTING: Contrast cytological study, which was performed in Central Laboratory of Shanghai 6th People's Hospital between October 2007 and March 2008.MATERIALS: Six 2-week-old rabbits were selected for BMSCs preparation and primary culture; Percoll separating medium (1.073 kg/L) was also used for this study.METHODS: BMSCs were separated and purified with Percoll separating medium by density gradient centrifugation and adherence method. The three-, five-, seven-, and nine-passage BMSCs were counted for growth curve. MAIN OUTCOME MEASURES: Morphological features and growth states of primary and passage cells were observed under inverted microscope. Indirect immunofluorescence of CD44 and CD34 antibodies were used to examine the stem cells. CD44 staining was positive, and CD34 staining was negative, suggesting the extracting and purifying cells were BMSCs. RESULTS: The passage BMSCs were uniformly distributed like fusiform shape, which were more uniform than primary cultured cells. The BMSCs grew productively and proliferated rapidly; meanwhile, the nucleolus was clear, caryopla.sm was in a large proportion, morphological features were uniform, ceils like bostrychoid or whirlpool were arranged parallelly, and the five-pa.ssage cells were not changed remarkably. Proliferation was decreased gradually with the passage increasing; especially, the proliferation of three-five-passage cells was the strongest. The separated cells expressed CD44 but not CD34. CONCLUSION: High-purified rabbit BMSCs are obtained by both density gradient centrifugation and adherence method.
10.Analysis of detection rate of thyroid malignant tumor before and after universal salt iodization and histological types
Junsheng CUI ; Jinsong NI ; Qingyang KONG ; Jing WANG
Journal of Jilin University(Medicine Edition) 2006;0(06):-
Objective To investigate and evaluate the detection and the variety of histology type constituent of the thyroid malignant tumor before and after universal salt iodization.Methods 1011 clinical pathological data of thyroid malignant tumor confirmed pathologically from 1961 to 2000 was retrospectively analyzed.The detection rate of thyroid malignant tumor,the constituent ratios of each histology type and the changes of age and sex distribution in main types of thyroid malignant tumor were determined.Results The total detection rate of thyroid malignant tumor after universal salt iodization (USI) (0.69%) were obviously increased compared with before universal salt iodization(0.46%,P40 years old) than before USI(≤40 years old).The incidence rates of thyroid malignant tumor in female patients were higher than male patients before and after USI.Conclusion The proportion and average age of thyroid malignant tumor increases after USI.The histological types of thyroid carcinoma have changes after USI:the proportion of PC increases obviously,the proportion of FC decreases accordingly.The average age of thyroid malignant tumor sufferers tends to increase and the peak ages of PC,FC and UC raise after USI.