Objective To investigate the intensity modulated radiation therapy (IMRT) planning optimization method to reduce the additional dose resulting from megavoltage cone-beam CT (MVCBCT) imaging for nasopharyngeal carcinoma IMRT treatment. Methods MVCBCT images collection process was simulated using XiO treatment planning system. The mean doses of MVCBCT ( DMVCBCT ) were calculated in gross tumor volume ( GTV), clinical target volume ( CTV ) and risk at organ or tissue using 27. 4 cm× 27.4 cm portal radiation 8 MU,5 MU (A,C) and 27.4 cm× 15.0 cm portal radiation 8 MU,5 MU (B,D). The dose correct factor of MVCBCT (CFMVCBCT) according to IMRT TPS and DMVCBCT ,but CFMVCBCT plus MVCBCT imaging process for radiotherapy planning optimization. The paired t-test was play for A∶ B,C∶ D,A∶ C,B∶ D of DMVCBCT. Results The DMVCBCT and CFMVCBCT of A, B, C, D were 7. 78,5. 78,4. 88,3.55 cGy ( A∶ C, t =24.41,P＜0.01) and 0.993 -0.997 in GTV,with 7.88,6.95,4.88,4.38 cGy (A∶ B,A∶ C,B∶ C,t=3. 85, -31.82, -8.52, all P＜0. 01) and 0.992 -0.996 in CTV1 ,with 8.28,6.67,5. 17,4. 17 cGy (A ∶B,A∶C,B∶C,B∶D,t=6.41 -18.24,all P＜0. 01) and 0.991 -0.996 in CTV2;with 6.88,5.00,4.28,3. 50 cGy ( A∶ B, A∶ C,t = 2. 83,11.03, all P ＜ 0. 05 ) and 0. 989 - 0. 995 in spinal cord, with 7.88,7. 38,4. 95,4. 62 cGy and 0. 984 -0. 990 in left parotid, with 8. 67,0. 28,5. 33,0. 28 cGy and 0. 963 -0. 999 in left optic nerve,with 9. 17,0.22,5.72,0. 17 cGy and 0.821 -0.997 in left eye lens,with 6.95,2. 17,4. 38,1.38 cGy and 0. 987 -0. 997 in brain stem, with 7.78,0.45,4. 95,0. 28 cGy and 0. 978 -0. 999 ( A ∶ B,A∶ C,B∶ C,B∶ D for five organ or tissue,t =5. 06 -335. 16 ,all P ＜0. 01 ) in optic chiasm. Conclusions The MVCBCT imaging process resulted in radiation doses to patient. The impact of MVCBCT image acquired dose on IMRT treatment plan for NPC was eliminated by a compensation method.

Objective In order to grasp the status quo of the internship nursing students' evidence awareness in our province, to improve the teaching measures, and to promote nursing safety. Methods We delivered questionnaires to 480 nursing students who were exercising practice in some major hospitals in our province about their contemporary consciousness of evidence, the results underwent analysis. Results The results showed that the awareness of nursing evidence was very poor in the new period. Conclusions It's imperative to enhance the normative education about evidence awareness among the nursing students.

Objective To investigate the inhibition of proliferation and the regulation of histone acetylation modification in Jurkat cells treated by sodium valproate(VPA). Methods Jurkat cells were treated with VPA.Cell proliferation was determined by CCK-8 assay, and cell cycle were analyzed by flow cytometry (FCM). mRNA of HDAC1 was detected by semi-quantitative RT-PCR, and protein expression of HDAC1 and acetylation of histone H3, H4 was examined by Western blotting. Results VPA inhibited the proliferation of Jurkat cells in concentration-and time-dependent manners. After exposure to VPA in different concentrations for 48h,cell cycle was arrested obviously at G0/G1 phase (P <0.05), and with increasing concentration, the percentage of G0/G1 phase cells was increased and that of S phase were decreased. HDAC1 mRNA expression were inhibited with the increasing concentration of VPA. The protein level of HDAC1 was down-regulated, while acetylation of histone H3、H4 was up-regulated in Jurkat cells by VPA. Conclusion VPA can inhibit proliferation of Jurkat cells and induce G0/G1 phase arrest. The mechanism may be that VPA increase acetylation of histone H3/H4 by inhibiting expressions of HDAC1 gene.

Objective To investigate the relationship between promoter hypermethylation of secreted frizzled-related protein (SFRP) gene and acute leukemia (AL). Methods We examined the promoter methylation starus of SFRP1, 2, 4 and 5 in primary or relapsed AL patients, cell lines ( HL60,NB4, Molt-4 and Jurkat) and peripheral blood mononuclear cells from healthy people with methylationspecific PCR (MSP). Results None of the normal mononuclear cells showed methylation of any SFRP genes. The frequencies of aberrant methylation among the samples were 33.9% (20/59) for SFRP1,23.7%(14/59) for SFRP2, 6. 8% (4/59) for SFRP4 and 10. 2% (6/59) for SFRP5 in acute myelocytic leukemia (AML), and 39.3% (11/28) for SFRP1, 28.6% (8/28) for SFRP2, 25.0% (7/28) for SFRP4 and 32. 1% (9/28) for SFRP5 in acute lymphoblastic leukemia (ALL). Hypermethylation of SFRP1, 2, 5genes were present in the 4 AL cell lines. SFRP4 was methylated in NB4, Molt-4 and Jurkat cell lines.However, methylation and unmethylation of SFRP4 were both detected in HL60. Conclusions Hypermethylation of SFRP genes is a common event in the evolution of AL. Methylation of SFRP genes might serve as potential independent biomarkers for early detection of AL.

Objective To study the optimum technological conditions of macroporous resin separation and purification of polyphenol composition. Methods Fingerprint of Ilex paraguariensis was established by HPLC method. The best resin, loading conditions and elution requirements were screened with chlorogenic acid and elution rate of total active constituents served as the index. Results The optimum technological conditions were as follows:the separation carrier was D101 macroporous resin,the concentration of the sample liquid was 0.10 g?mL-1 ,the resin adsorption quantity of crude drugs was 1.5 g?g-1 ,the impurity was removed by four times of amount of water at first,and then eluted with four times the amount of 70％ ethanol in a gradient manner.After purification,the elution rate of chlorogenic acid was up to 82.83％,and the elution rate of total effective component was about 72. 48％. The resemblance of HPLC fingerprint was over 0. 98, and the components were balancedly recoveried. Conclusion The purification process of total polyphenols in Ilex paraguariensis by D101 macroporous resin was simple,reliable,and can be used for large-scale production.

OBJECTIVETo study the promoter methylation status of SFRP genes and the effect of 5- aza- 2'- deoxycytidine (5- Aza- CdR)induced apoptosis via Wnt/β- catenin pathway by demethylation in Jurkat cells.

METHODSJurkat cells were treated with different concentrations of 5- Aza- CdR. The cell proliferation level of Jurkat cells was detected by MTT assay. Apoptosis was evaluated by flow cytometry. Methylation- spcific PCR (MSP) was used to determine the methylation status of SFRP genes. The expressions of SFRP genes were detected by real time fluorescence quantitative PCR. The mRNA expression levels of survivin, c- myc and cyclin- D1 were analyzed by RT- PCR. Western blot was used to detect the levels of β-catenin protein.

RESULTSCompared with control group, the different concentrations of 5-Aza-CdR could significantly inhibit the proliferation of Jurkat cells in a time-dose dependent manner (P<0.05). After being treated by 5- Aza- CdR for 48 hours, the cell early apoptosis rate in experiment group was significantly higher than that in control group (P<0.05). The promoters of SFRP1, SFRP2, SFRP4, SFRP5 genes were hypermethylation state in the control group, after being treated by 5-Aza-CdR for 72 hours, the brightness of SFRP1, SFRP2, SFRP4, SFRP5 genes' methylation strips weakened in a dose- dependent manner. SFRP mRNA expression increased (P<0.05) when 5- Aza- CdR concentration increased, and the level of β- catenin protein was dampened in a dose- dependent manner (P<0.05). As compared to the control group, the mRNA expressions of associated apoptosis genes survivin, c-myc and cyclin- D1, respectively were obviously down- regulated in a dose- dependent manner (P<0.05).

CONCLUSIONThe effect of demethylation could up- regulate SFRP genes expressions by reversing its hypermethylation and induced apoptosis by down-regulation of β-catenin and associated apoptosis genes.

Apoptosis ; Azacitidine ; analogs & derivatives ; pharmacology ; Cell Proliferation ; DNA Methylation ; Down-Regulation ; Gene Expression ; Humans ; Intercellular Signaling Peptides and Proteins ; genetics ; Jurkat Cells ; Membrane Proteins ; genetics ; Promoter Regions, Genetic ; Wnt Signaling Pathway ; beta Catenin ; metabolism

Objective:To investigate the clinical manifestation, diagnosis and treatment of chronic lymphocytic leukemia patients with renal involvement.Methods:The clinical data of a chronic lymphocytic leukemia patient with nephrotic syndrome as the initial manifestation in Fujian Provincial People's Hospital in October 2020 were retrospectively analyzed, and the related literature was reviewed.Results:The patient was a 68-year-old male with recurrent edema and foam urine as the initial manifestations, and he was diagnosed as nephrotic syndrome in the nephrology department. After treatment, the symptoms showed no significant improvement, and the lymphocyte count gradually increased. The patient was diagnosed as chronic lymphocytic leukemia in the hematology department. After ibrutinib monotherapy, the lymphocyte count and urine protein gradually decreased to normal levels, and the clinical efficacy evaluation of the patient was complete remission at the end of follow-up.Conclusions:Chronic lymphocytic leukemia with nephrotic syndrome as the initial manifestation is rare, and the clinical presentations are variable. Early diagnosis is the guarantee of successful treatment. The efficacy and safety of first-line Bruton tyrosine kinase inhibitor monotherapy are good.

Three new sesquiterpene glycosides, named codonopsesquilosides A-C (1-3), were isolated from an aqueous extract of the dried roots of Codonopsis pilosula. Their structures including absolute configurations were determined by spectroscopic and chemical methods. These glycosides are categorized as C15 carotenoid (1), gymnomitrane (2), and eudesmane (3) types of sesquiterpenoids, respectively. Compound 1 is the first diglycoside of C15 carotenoids to be reported. Compound 2 represents the second reported example of gymnomitrane-type sesquiterpenoids from higher plants. The absolute configurations were supported by comparison of the experimental circular dichroism (CD) spectra with the calculated electronic CD (ECD) spectra of 1-3, their aglycones, and model compounds based on quantum-mechanical time-dependent density functional theory. The influences of the glycosyls on the calculated ECD spectra of the glycosidic sesquiterpenoids, as well as some nomenclature and descriptive problems with gymnomitrane-type sesquiterpenoids are discussed.

Seven new 4-hydroxybenzyl-substituted amino acid derivatives (1-7), together with 11 known compounds, were isolated from an aqueous extract of the rhizomes of Gastrodia elata Blume. Their structures were determined by spectroscopic and chemical methods. Compounds 1-3 are pyroglutamate derivatives containing 4-hydroxybenzyl units at the N atom and 4-7 are the first examples of natural products with the 4-hydroxybenzyl unit linked via a thioether bond to 2-hydroxy-3-mercaptopropanoic acid (4-6) and 2-hydroxy-4-mercaptobutanoic acid (7), which would be biogenetically derived from cysteine and homocysteine, respectively. The structures of 1 and 2 were verified by synthesis, while the absolute configurations of 4, 5 and 7 were assigned using Mosher's method based on the MPA determination rule of Δδ RS values. The known compound 4-(hydroxymethyl)-5-nitrobenzene-1,2-diol (8) exhibited activity against Fe(2+)-cysteine induced rat liver microsomal lipid peroxidation with IC50 values of 9.99×10(-6) mol/L.

Four new acetylenes (1-4) and one new unsaturated ω-hydroxy fatty acid (5), together with 5 known analogues, were isolated from an aqueous extract of Codonopsis pilosula roots. Their structures were determined by spectroscopic and chemical methods. The new acetylenes are categorized as an unusual cyclotetradecatrienynone (1), tetradecenynetriol (2), and rare octenynoic acids (3 and 4), respectively, and 3 and 4 are possibly derived from oxidative metabolic degradation of 1 and/or 2. The absolute configuration of 1 was assigned by comparison of the experimental circular dichroism (CD) spectrum with the calculated electronic circular dichroism (ECD) spectra of stereoisomers based on the quantum-mechanical time-dependent density functional theory, while the configuration of 2 was assigned by using modified Mosher׳s method based on the MPA determination rule of Δδ RS values for diols.