1.Research progress in notch signaling pathway in breast cancer stem cells
Chinese Journal of Clinical Oncology 2014;(14):938-941
Breast cancer stem cells (BCSC) are group of cells exhibiting self-renewal and multi-directional differentiation potentials. These cells have an important role in the occurrence, development, metastasis, and recurrence of breast cancer. In normal circumstances, the ability of mammary stem cells to differentiate and undergo self-renewal is governed by related signaling pathways. After this mechanism is destroyed, breast stem cells undergo abnormal differentiation, forming breast cancer stem cells that unlimitedly proliferate to develop into breast cancer. As research on BCSC increasingly deepens, regulation of BCSC by notch signaling and its crosstalk with several signaling pathways have drawn a great deal of attention in this field. This paper reports the signaling pathways of breast cancer stem cells and latest studies on this field to better understand the essential role of notch signaling pathway in the occurrence and development of breast cancer and corresponding clinical targeted therapy.
3.Treatment of chronic periodontitis with traditional Chinese medicine
Lijun GUO ; Jingjing GU ; Xiaofeng LIU ; Jin YU ; Rong SHU
Journal of Practical Stomatology 2000;0(06):-
0.05), after treatment all the indexes in the 2 groups were decreased(P
4.Screening for Causative Genes Involved in Children with Minimal Change Nephritic Syndrome
guo-bing, WANG ; cheng-rong, LI ; ying, ZU ; jun, YANG ; jin-rong, FU
Journal of Applied Clinical Pediatrics 2006;0(19):-
Objective To screen for the causative genes involved in the occurrence and development of minimal changes nephritic syndrome(MCNS) and to furtherly assist the genetic diagnosis and treatment of MCNS.Methods Human genome U133 Array Set from Affymetrix Inc was used to evaluate gene expression patterns in peripheral blood mononuclear cells(PBMC) isolated from 7 children with primary MCNS and 7 age-matched health volunteers.Reverse transcription-polymerase chain reaction(RT-PCR) and real-time PCR were performed to identify the findings of gene chip.Results Of 33 000 genes detected,969 genes showed significant difference between children with(MCNS) and healthy volunteers;552 genes were up-regulated,while 417 genes down-regulated significantly.Findings from RT-PCR and real-time PCR were consistent with those of gene chip.Conclusions Gene chip of expression patterns is a powerful method to detect expression difference of genes correlated with MCNS.Occurrence and development of MCNS can be a complicated process that many correlative genes may participate in.
5.The potential effects of linalool on enantioselective skin permeation of norgestrel.
Yi RONG ; Wen-Ying YU ; Xia GUO ; Shan-Shan ZENG ; Zheng-Rong SHEN ; Su ZENG ; Jin-Cui YE
Acta Pharmaceutica Sinica 2014;49(8):1175-1180
The purpose of this study is to investigate the enantioselectivity of norgestrel (NG) transdermal permeation and the potential influence of linalool and lipids on the enantioselectivity. In vitro skin permeation studies of NG across the excised rat skins were performed with Valia-Chien diffusion cells, and the permeation samples were analyzed by enantioselective HPLC. The possible enantioselective permeation of NG across intact rat back skin and lipids extracted rat back skin and the influence of linalool were evaluated. The skin permeation rate of dl-NG was two times higher than that of l-NG when donor solutions (EtOH/H2O 2 : 8, v/v) containing l-NG or dl-NG. It may be mainly attributed to the solubility discrepancy between enantiomer and racemate. The enantioselective permeation of dl-NG across intact rat skin was observed when the donor solutions containing dl-linalool. The permeation flux of l-NG was 22% higher than that of d-NG. But interestingly, the enantioselective permeation of dl-NG disappeared under the same experimental condition except that the lipid extracted rat skin was used. Attenuated total reflection-fourier transform infrared spectroscopy analysis of stratum corneum showed that the wave number for asymmetric CH2 stretching vibrations of lipids treated with dl-linalool was greater than that of the control. The results indicated that the enantioselective permeation of NG may be contributed by the interaction between dl-linalool and lipids. More than half of lipids were composed of ceramides. The stereospecific interaction maybe existed among chiral enhancer (linalool), lipids (ceramides) and/or chiral drugs (NG).
Administration, Cutaneous
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Animals
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Lipids
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pharmacology
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Monoterpenes
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pharmacology
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Norgestrel
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pharmacokinetics
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Rats
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Skin Absorption
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drug effects
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Spectroscopy, Fourier Transform Infrared
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Stereoisomerism
6.Clinical significance of HPV E6/E7 mRNA test combining TCT test to detect early cervical dysplasia
Zuoli XIA ; Guo-Rong CHEN ; Dan PAN ; Pin LIN ; Ru JIN ;
The Journal of Practical Medicine 2016;32(18):3053-3056
Objective To investigate the value of HPV E6/E7 mRNA test combining liquid-based cytology test in cervical cancer screening. Methods A total of 377 samples from Wenzhou People's Hospital from June 2014 to September 2015 were collected and screened by HPV E6/E7 mRNA test combining with liquid-based cytology test , and the results was compared with the findings from the gold criteria of histology and pathology. Results The combination of HPV E6/E7 mRNA test and liquid-based cytology test can enhance the testing sensitivity and specificity. The sensitivity of the combination of HPV E6/E7 mRNA test and liquid-based cytology test for the diagnosis of LSIL was 94.41%, and that for the diagnosis of HSIL was 96.36%. Based on the gold criteria of histology and pathology , the sensitivity , specificity , positive-predictive value and negative predictive value of HPV E6/E7 mRNA test for the diagnosis of HSIL was 90%, 60.67%, 48.53% and 92.49%respectively. The sensitivity, specificity, positive-predictive value and negative- predictive value of liquid-based cytology test for the diagnosis of HSIL was 72.73%, 75.28%, 54.79% and 87.01% respectively. Conclusions The sensitivity of HPV E6/E7 mRNA test is superior to that of liquid-based cytology test , while the specificity of HPV E6/E7 mRNA test is inferior to that of liquid-based cytology test. The negative predictive value of HPV E6/E7 mRNA test is more meaningful than that of liquid-based cytology test. The combination of HPV E6/E7 mRNA test and liquid-based cytology test can enhance the testing sensitivity , but it does not increase the specificity.
7.Superficial siderosis in the central nervous system:report of a case with asymptomatic hypoglycemia
Jian-Hua CHENG ; Rong-Yuan ZHENG ; De-Xin JIN ; Guo-Qian CHEN ;
Chinese Journal of Neurology 2001;0(02):-
Objective To investigate the clinic characters and diagnosis of superficial siderosis in the central nervous system (SSCN).Methods One patient was systematically studied by the authors. Results SSCN was a rare entity,resulting in the deposition of ferric pigments and ions on the surface of the central nervous system.The clinical features included progressive sensorineural hearing loss,cerebellar ataxia and pyramidal sign,widespread hypointensity band at surfaces of the cerebral or cerebellar hemispheres,the brain stem and the spinal cord on Gradient Echo T_2~*-weighted images (GRE-T_2~* WI) of MR,elevation of the levels of ferritin in the cerebrospinal fluid.Conclusions This disease can be identified at early stage with history and physical examination.GRE-T_2~* WI and some related cerebrospinal fluid tests will contribute to diagnosis.
8.R-HPLC determination of plasma AZT concentration
Shu GAO ; Jun LI ; Longfu RONG ; Yong JIN ; Hongwei YAO ; Lin GUO ; Shuyun XU ;
Chinese Pharmacological Bulletin 1986;0(06):-
AIM To establish a RP HPLC method for the determination of zidovudine(AZT) plasma concentration. METHODS A shim pack,VP ODS. 5 ?m 4 6?150 mm radial compression column was used with a mobile phase of tetrahydrofuran water trifluoroacetic acid(10∶89 8∶0 2). The flow rate was 1 0 ml?min -1 .The detector was operated at 267 nm. RESULTS The calibration curves of AZT were linear separately within the concentration range of 0 02~20 mg?L -1 . The relative standard deviations for within day and between days assays were all less than 5%. The relative recovery of the method were 96 4%. The limit of quantitation of the assay is 10 ?g?L -1 of plasma. CONCLUSIONS The methed is rapid,accurate and stable. The determination of AZT plasma concendration could be used.
9.The influences of hepatitis B virus precore and basic core promoter region mutations on the immune responses of specific cytotoxic T lymphocytes
Xiao-Juan YANG ; Guo-Rong WU ; Hao PEI ; Jin-Juan QIAN ; Rui-Yun JI ;
Chinese Journal of Infectious Diseases 2007;0(12):-
Objective To investigate the influences of mutation at precore and basic core promoter(BCP) region in hepatitis B virus(HBV) on the immune response of specific cytotoxic T lymphocytes(CTL) in patients with chronic hepatitis B(CHB).Methods The number of specific CTL in peripheral blood mononuclear(PBMC) of CHB patients were tested by cytokine flow cytome- try(CFC) and HBV core18-27 peptide.HBV precore and BCP fragments were directly sequenced. Results Twenty-one(38.9%) samples were HBV precore G1896A mutation.Twenty-six(48.1%) samples were BCP region 1762/1764 combined mutation.Thirteen(24.1%) stains were three sites mutated simultaneously.Stimulated with HBV core 18-27 in vitro,the specific CTL level was signifi- cantly higher in the patients with G1896A mutation and BCP region mutation [(0.41?0.09)%, (0.36?0.08)%,(0.48?0.08)%,respectively]than those without mutation[(0.11?0.06)%, P
10.Quantitative study on depth of ketamine anesthesia for preschoolers
rong-guo, LIU ; wei-fu, LEI ; jin-gui, YU ; jun-zhang, DU ; shi-da, YING
Journal of Applied Clinical Pediatrics 2004;0(11):-
Objective To compare and quantify the determinants in quantitative electroencephalogram(q-EEG) and heart rate variability power spectrum analysis(HRV-PSA) of ketamme(KTM) anesthesia for preschoolers. Methods Seventy four cases were selected and assigned into 3 groups named A(4-5 years), B(5-6 years), C(6-7 years), 22,28,24 cases in every group respectively. All cases were induced with KTM 5 mg /kg intramuscularly and changes of determinants were recorded continuously. If body movement happened, KTM would be injected with 1 mg/kg. Results On pre- anesthesia, BIS in group A was the least among 3 groups, while LF/HF and HRVI were the largest(P