Orthogonal descriptors is a viable method for variable selection, but this method strongly depend on the orthogonalisation ordering of the descriptors. In this paper, we compared the different methods used for order the descriptors. It showed that better results could be achieved with the use of backward elimination ordering. We predieted Rf value of phenol and aniline derivatives by this method, and compared it with classical algorithms such as forward selection, backward elimination, and stepwise procedure. Some interesting hints were obtained.

ObjectiveTo evaluate the efficacy of epidural infusion of a mixture of bupivacaine-fentanyl-dexamethasone on top of intravenous extract from rabbit skin inflamed by vaccinia virus (ERSVV) for severe herpetic neuralgia.MethodsForty-eight patients of both sexes with severe herpetic neuralgia aged 45-92 yr were randomly divided into 2 groups (n =24 each):control group (group C) and test group( group T).Both groups received intravenous ERSVV 6 ml/d.Group C received oral amitriptyline and gabapentin,while the group T received epidural infusion of 100 ml of a mixture of 0.075％ bupivacaine,fentanyl 2 μg/ml and dexamethasone 50 μg/ml in normal saline at 2-5 ml/h,once a day for 10 days and VAS score was maintained≤4.Epidural puncture was performed at the spinal segments severely affected by herpes virus.Intensity of pain was assessed with VAS (0 =no pain,10 =worst pain).In group C when VAS ＞ 4 oral amitriptyline 12.5 mg (once/d) and gabapenti 0.1 g (3 times/d) were given as rescue analgesics.Adverse effects of epidural infusion and incidence of post-herpetic neuralgia were recorded.ResultsThe incidence of urinary retention and incidence of post-herpetic neuralgia were lower in group T than in group C.No other adverse effects were found in group T.ConclusionEpidural infusion of a mixture of bupivacaine-fentanyl-dexamethasone on top of ERSVV can effectively reduce severe herpetic neuralgia and prevent development of post-herpetic neuralgia safely.

Objective To investigate the effects of sevoflurane postconditioning on cardiomyocyte apoptosis during myocardial ischemia-repeffusion (I/R) in rats.Methods Forty-five healthy male Wistar rats weighing 250-280 g were randomly divided into 3 groups ( n =15 each):group sham operation ( group S) ; group I/R and group sevoflurane postconditioning (group Spo).The animals were anesthetized with intraperitoneal 3％ pentobarbital 45 mg/kg,tracheally intubated and mechanically ventilated.Myocardial I/R was produced by occlusion of anterior descending branch of left coronary artery for 30 min followed by 120 min reperfusion in groups I/R and Spo.In group Spo the animals inhaled 2.5％ sevoflurane for 5 min starting from 1 min before reperfusion was started.The animals were sacrificed at the end of 120 min reperfusion.Their hearts were removed for measurement of infarct size and the area at risk and determination of apoptotic index (the number of apoptotic cells/the total number of cells) and Bcl-2 and Bax protein and mRNA expression.Results Sevoflurane postconditioning significantly reduced infarct size in group Spo as compared with group I/R.There was no significant difference in area at risk between groups I/R and Spo.Myocardial I/R significantly increased the apoptotic index,Bcl-2 and Bax protein and mRNA expression in group I/R as compared with group S.Sevoflurane postconditioning significantly decreased apoptotic index and Bax protein and mRNA expression but increased Bcl-2 protein and mRNA expression in group Spo as compared with group I/R.Conclusion Sevoflurane postconditioning attenuates myocardial I/R injury by redncing myocardial apoptosis,up-regulating Bcl-2 expression and down-regulating Bax expression.

Objective To study the baseline level of fraction anisotropy (FA) and the normal value of apparent diffusion coefficient (ADC) in deep white matter of preterm and its application.Methods From Oct.2010 to Dec.2013,in Department of Neonatology,Jiangsu Province Hospital,magnetic resonance imaging (MRI) (T1,T2) and diffusion tensor imaging (DTI) were done on 13 preterm infants of less than 37 weeks of corrected gestational age (CA),42 preterm infants of term-matched age,and 15 term infants.ADC and FA were measured in genu and splenium of corpus callosum (CC),anterior limb and posterior limb of internal capsule (IC).Results 1.The ADC values in genu,splenium,anterior limb of right IC,posterior limb of right IC,anterior limb of left IC,posterior limb of left IC in CA ＜ 37 weeks infants were higher than those in term-matched infants and in term infants.The ADC values in the 6 regions in term-matched infants and in term infants were significantly different with those in CA ＜ 37 weeks infant(F =5.559,5.775,21.948,19.462,30.586,15.452,all P ＜ 0.01).The differences of ADC values between CA ＜ 37 weeks infants and term-matched infants,between CA ＜37 weeks infants and term infants were significant(all P ＜0.05),except that in CC between CA ＜ 37 weeks infants and term-matched infants.2 The FA values in genu,splenium,anterior limb of right IC,posterior limb of right IC,anterior limb of left IC,posterior limb of left IC in CA ＜ 37 weeks infants were lower than those in term-matched infants and in term infants.The FA values in the 6 regions in term-matched infants and in term infants were significantly different from those in CA ＜ 37 weeks infants (F =9.835,7.500,4.811,11.430,8.674,12.666,all P ＜ 0.01).The differences of FA values between CA ＜ 37 weeks infants and term-matched infants (P ＜ 0.05),between CA ＜ 37 weeks infants and term infants were significant (all P ＜ 0.05).Conclusions The baseline values of FA and ADC in different deep white matters were obtained.As corrected gestational age of preterm babies' increased,FA values in brain white matter increased,while ADC values decreased.The myelination in most white matter of preterm infants at matched term can catch up with that of term infants.The diagnostic value of ADC and FA needs to be studied further.

[Abstract ] Objective Pelvic radiation disease(PRD) is multiple injuries in more than one organ resulted by pelvic radio-therapy.Patients have the symptoms of frequent feces and fecal incontinence after the resection of small bowel lesion .Sugeries on PRD patients were mainly distal ileum and ilieocecal valve resections , while the most susceptible part of pelvic radiation injury is rectum . However , little research has been done concerning PRD patients′anorectal functions .This study was mainly to evaluate the anorectal function of cervical cancer patients with PRD in order to provide evidence for the therapy and prognosis of PRD . Methods Cervical cancer patients with PRD in need of small bowel resection who hospitalized in our department from January 2014 to January 2015 were collected as patient group , while people from outpatient physical exam group were selected as control group according to the exclusion criteria of hypertension , diabetes, constipation and unrelaxed pelvic floor syndrome .PDR group and control group were matched according to age.All subjects underwent colonoscopy and anorectal manometry .Rectal radiation injury was estimated on the basis of colonoscopy results.Anorectal manometry results of PRD group and control group were analysised statistically . Results PRD group and control group both included 20 women without stenosis or obstruction in rectum .Significant difference was found between PRD group and con-trol group in anal resting pressure (47.23 ±9.08 mmHg vs 58.25 ±9.24 mmHg, P<0.05), anal maximum squeezing pressure (47.23 ±9.08 mmHg vs 58.25 ±9.24 mmHg, P<0.01), anal distension pressure (23.30 ±12.49 mmHg vs 39.10 ±9.99 mmHg, P<0.01), rectal defecation pressure(22.85 ±16,69 mmHg vs 50.90 ±9.14 mmHg, P<0.01) and maximum tolerated rectal volume (112.85 ±51.34 mL vs 173.50 ±48.15 mL, P<0.01).There was no significant difference between the two groups as to the lenghth of functional sphincters(P=0.313),rectum initial threshold(P=0.416) and rectal defecation threshold(P=0.161). Conclusion Ionization radiation that injures PRD patients′internal anal sphincters and external anal sphincters also reduces maximum tolerated rec -tal volumes preoperatively .It′s necessary to assess the muscles and nerve functions of anorectum before intestinal surgery in order to make a proper operation plan which will improve PRD patients′life quality.

To prepare the RNAse-resistant virus particles containing the partial gene fragments of avian influenza virus H5N1 for use as RNA standard and control in RNA virus detection, the genes coding the coat protein and maturase of E.coli bacteriophage MS2 were amplified by PCR and then cloned into prokaryotic expression vector pET32a to construct the intermediate vector pET32a-MS2. In addition, the gene sequences coding hemagglutinin (HA), neuraminidase(NA) and M protein of the H5N1 virus were also cloned separately to the down-stream of plasmid pET32a-MS2, thus constructing the prokaryotic expression vectors pET32a-NS2-HA, pET32a-MS2-NA and pET32a-MS2-M. These recombinant plasmids were then transformed separately to E.coli BL21(DE3) with induction by IPTG. to express the virus-like particles. The virus-like particles observed under electron microscopy were identified by RT-PCR ,while their stability was confirmed by real-time RT-PCR. In this way, the virus-like particles were successively constructed and identified through PCR amplification, enzymolysis identification and sequencing analysis. These virus-like particles observed under electron microscopy appeared to be circular in shape with a diameter of about 50 nm. Their stability was proved to be rather good. From these observations, it is apparent that these virus-like particles can be used as RNA standard and quality control in the detection of avian influenza virus H5N1.

Objective:To establish O-(2-[ 18F]fluoroethyl)- L-tyrosine( 18F-FET) PET radiomics features-based model and investigate its predictive efficacy for isocitrate dehydrogenase type 1 (IDH1) genotyping in untreated gliomas. Methods:From November 2017 to February 2019, 58 pathologically confirmed glioma patients (36 males, 22 females; age (41.8±15.1) years) with preoperative 18F-FET PET/CT imaging in Huashan Hospital, Fudan University were retrospectively enrolled. PyRadiomics software package was used to extract 105 radiomics features. Least absolute shrinkage and selection operator (LASSO) algorithm with 5-fold cross-validation was used to build the logistic regression model. And radiomic scores (RS) of each lesion were calculated according to their weighted coefficients. The area under the receiver operating characteristic (ROC) curve was used for evaluating the predictive efficacy for IDH1 prediction. The predictive efficacies of radiomics model and traditional semi-quantitative parameters including tumor-to-background ratio (TBR; maximum TBR (TBR max), mean TBR (TBR mean), peak TBR (TBR peak)), metabolic tumor volume (MTV) and total lesion tracer uptake (TLU), were compared by Delong test. Results:Seven radiomics features including maximum 2-dimensional (2D) diameter slice, first order_maximum, first order_range, gray level co-occurrence matrix (GLCM)_joint energy, GLCM_inverse variance, gray level dependence matrix (GLDM)_dependence entropy and GLDM_large dependence low gray level emphasis were selected for the LASSO regression model building and RS calculation. ROC analysis results showed that the predictive accuracy of RS for IDH1 genotyping (mutation, n=20; wild-type, n=38) was 81.0%(47/58), with sensitivity of 65.0%(13/20), specificity of 89.5%(34/38), and area under curve (AUC) of 0.842, respectively. The traditional 18F-FET semi-quantitative parameter TLU ranked the second regarding the diagnostic performance, with accuracy of 60.3%(35/58), sensitivity of 85.0%(17/20), specificity of 47.4%(18/38), and AUC of 0.661( z=3.426, P<0.01). Conclusion:Radiomics analysis based on 18F-FET PET images can improve the predictive efficacy for IDH1 genotyping in untreated adult glioma patients.

Objective To prepare and study the immunogenicity of hepatitis B virus surface anti-gen (HBsAg)-tetanus toxoid (TT) conjugate vaccine. Methods Tr was activated by cyangen bromide and reacted with adipic acid dihydrazide, then HBsAg-TT conjugate was prepared by carbediimide. Conjugate, HBsAg or hepatitis B vaccine was injected subcutaneously into mice. Anti-HBsAg and HBsAg-specific T cell response elicited by these immunogens were assayed. Results New HBsAg-TT conjugate elicited higher levels of anti-HBsAg and HBsAg positive conversion rates after the immunization than did HBsAg alone or hepatitis B vaccine. Conjugate induced mesdy antibodies of the IgG2a subclass, while HBsAg alone or hepa-titis B vaccine mainly elicited anti-HBsAg in the IgG1 subclass. The number of IFN-γand IL-2 secreting T cells induced by conjugate was also significantly higher than that did by HBsAg or hepatitis B vaccine. Con-clusion This study indicated new HBsAg-TT conjugate can induce both stronger humoral and TH1 type of cellular immune response.

OBJECTIVE: To evaluate the feasibility of cochlear implantation by functional magnetic resonance imaging (fMRI) in a patient with cochleovestibular nerve hypoplasia. METHOD: Audiometry, radiological examination and fMRI of the auditory cortex were performed to a 15-year-old boy with bilateral hearing loss before cochlear implantation. RESULT: Results of pure tone audiometry and auditory brainstem responses showed profound sensorineural hearing loss (SNHL). Transiently evoked otoacoustic emission was absent on both sides. High resolution computed tomography revealed the inner ear malformation (incomplete partition I) on both side. Oblique sagittal reconstruction in magnetic resonance imaging (MRI) showed the malformation of cochleovestibular nerve, fMRI demonstrated the activation of the right primary auditory cortex during 1-kHz monaural stimulation on the left side. No cortical activation appeared during the monaural right acoustic stimulation using the same sound pressure level. The child had subjective auditory response 1 month after cochlear implantation on his left side. CONCLUSION fMRI would be an effective measure in the assessments for the cochlear implantation candidates, combining with audiometry and radiological examination, especially when MRI shows cochleovestibular nerve malformation in these patients.
Adolescent ; Child ; Cochlear Implantation ; methods ; Cochlear Implants ; Evoked Potentials, Auditory, Brain Stem ; Hearing Loss, Sensorineural ; physiopathology ; Humans ; Magnetic Resonance Imaging ; Male ; Vestibulocochlear Nerve ; abnormalities ; physiopathology

OBJECTIVETo investigate the relationship between the expression of glucose regulated protein 94 (GRP94) at the level of mRNA and protein in vivo and in human lung cancer.

METHODSRT-PCR, immunohistochemistry and/or Western blot were used in 54 cases of lung cancer tissues and corresponding normal lung tissues.

RESULTSThere was a significant overexpression of GRP94 mRNA and protein in lung cancer tissues as compared with lung normal tissues. In lung cancer tissue, the relative level of GRP94 mRNA as evaluated by RT-PCR was 3.48 +/- 2.06, the level of GRP94 protein as evaluated by immunohistochemistry was + + to + + +, and by Western blot was 256.7 +/- 80.6. In lung normal tissue, the relative level of GRP94 mRNA was 2.01 +/- 1.83, the level of GRP94 protein was + to + + and 108.1 +/- 42.3. The differences in expression of GRP94 between the two tissues were significant (P < 0.05). Furthermore, the over-expression of GRP94 in the lung cancer tissues was correlated to grade of differentiation and stage of tumors. There was stronger expression in poor-differentiated tumors than in mild-to-high differentiated tumors (P < 0.05). There was also a stronger expression in stage III than in stage I and II tumors (P < 0.05). No statistically significant difference was found among various pathological types of tumors.

CONCLUSIONGRP94 was related with the occurrence, differentiation and progress of human lung cancer. Ascertaining the levels of GRP94 mRNA and protein may be valuable in evaluating the grade of differentiation and clinical stage of human lung cancer.

Adult ; Aged ; Blotting, Western ; Endoplasmic Reticulum ; chemistry ; Female ; HSP70 Heat-Shock Proteins ; analysis ; genetics ; Humans ; Immunohistochemistry ; Lung ; chemistry ; Lung Neoplasms ; chemistry ; pathology ; Male ; Membrane Proteins ; analysis ; genetics ; Middle Aged ; Neoplasm Staging ; RNA, Messenger ; analysis