Objective:To study the clinical effect and safety of aerosol inhalation of recombinant human interferon α-2b( P. puti-da) in the children with viral upper respiratory tract infection ( VURI) . Methods: Totally 100 children diagnosed as viral upper re-spiratory tract infection were randomly divided into the observation group and the control group with 50 cases in each. The two groups of children were both given symptomatic and supportive treatment, and the observation group was given IFN-α2b (P. putida) 150 000 IU·kg-1 ·d-1 in 2-4 ml 0. 9% sodium chloride injection with aerosol inhalation, qd, 5-10 min each time, and the control group was given ribavirin 10-15 mg·kg-1 ·d-1 in 5% glucose injection 150 ml, ivd, and a course of treatment was continuous 5 d. The fever, cold symptoms ( catarrh, cough, malaise) and clinical efficiency of the two groups were compared. Results:The defervescence effect of the observation group was significantly higher than that of the control group after the treatment(P<0. 05). The effect in the children with mild and moderate cough in the observation group was better than that in the control group, and the changes were statistically sig-nificant difference(P<0. 01). The heat range, cough fading time, catarrh symptom and systemic symptom disappearance time in the observation group were significantly better than those in the control group(P<0. 05). The clinical efficient rate of the observation group was 96. 0%, which was significantly higher than that (84. 0%) in the control group(P<0. 05) . Conclusion: Combined with the conventional therapy, aerosol inhalation of IFN-α2b can be effectively and safely used for treating viral upper respiratory tract infec-tion in children, which is worthy of popularized use in clinics.

Objective To investigate the relationship between polymorphisms of interleukin-4 receptor (IL-4R) gene (E375A, C406R, Q576R) and childhood asthma in Harbin. Methods Ninety-one (91) children with asthma were included, and 42 healthy children were enrolled as control. The genotype polymorphisms of IL-4R were determined by polymerase chain reaction-restriction fragment length polymorphism analysis. Results There was no significant difference in the distributions of the genotypes at both 1 124 A/C polymorphic sites (i.e. E375A polymorphism) and 1 902 A/G polymorphic site (i.e. Q576R polymorphism) in IL-4R between asthmatic group and control group (P > 0.05). There was significant difference in the distributions of the genotypes (CC, CR, RR) on 1 216 T/C polymorphic site (i.e. C406R polymorphism) in IL-4R between the two groups (P < 0.05). The R allele frequency was 22.94% in asthmatic group and 6.58% in control group, with significant difference between the two groups (P < 0.05), but the allele frequencies at this site did not satisfy Hardy-Weinberg equilibrium (P < 0.05). Conclusions Our data suggest that the E375A and Q576R polymorphisms in IL-4R is not associated with the development of asthma in children in Harbin. Further study is needed on the relationship between C406R polymorphism and asthma.

Objective By studying the changes of the seizures of infantile spasm(IS)、EEG and HPA axis function before and after the treatment of prednisone,to explore the efficacy of prednisone in treating infan-tile spasm,the role of HPA axis in the pathogenesis of IS,and elucidate the HPA axis mechanism of prednisone in controling seizure.Methods A total of 30 patients with IS (IS group) and 30 cases of healthy infants and young children (control group) were recruited.Number of seizures、EEG、HPA axis function was detected be-fore and after the treatment of prednisone in patients with infantile spasm.Serum cortisol,ACTH were deter-mined by the chemiluminescence analysis,serum CRH was measured by enzyme-linked immunosorbent assay. Results serum CRH levels of IS group was significantly higher than normal control group(P<0.05).Serum cortisol,ACTH in IS group were no evidently different compared with control group (P>0.05).The average number of daily ictal clusters and the average daily total seizure number positively correlated with CRH respec-tively.After the application of the prednisolone,seizure of 19 cases of the IS were controlled,11 cases were not controlled,18 cases of hyperarrhythmia were completely remited and 12 cases of hyperarrhythmia were not com-pletely remited.The average number of daily ictal clusters and The average daily total seizure number after treat-ment were significantly lower than before treatment(P<0.05);DQ after treatment was higher than DQ before treatment(P<0.05);The pathogenesis was the main influencing factor of the prednisone treatment effect,the length of the disease,the worse the treatment(P<0.05).CRH、cortisol、ACTH after treatment were significantly lower than before treatment(P<0.05).Conclusion Prednisone can effectively control the onset of infantile spasms,and early treatment is better.IS patient has HPA axis dysfunction,and prednisone can regulate HPA axis dysfunction to control spasm.

Objective ToexploretheMRIperformanceofpapillarythyroidcarcinomawithhobnailfeatures(HPTC)andthedifferential diagnosisfromclassicpapillarythyroidcarcinoma(CPTC).Methods Dataof93patientswithconfirmedPTCandMRIexamination oneweekbeforesurgerywereretrospectivelycollected.Thedifferencesoftheage,sex,tumorsize,ADCvaluesand MRIfeaturesof HPTCandCPTCweredetermined.Results 10HPTCand78CPTCwereincludedinthisstudy.ThefrequencyofT2WIsignificantly highsignal,segmentationlinearlowsignal,lacesignandgyrus-likestructureofHPTCwassignificantlyhigherthanthatofCPTC (P=0.000).ComparedtoCPTC,HPTCshowedmoreirregularshape(P=0.005),largervolume(P=0.025),moremixedT2WI andDWIsignals(P=0.002,0.028,respectively),higherADCvalues(P=0.019),anddelayedmass-likeenhancement(P=0.041). Conclusion HPTClesionshavelargervolume,irregularshape,mixedT2WIsignals,mixedDWIsignalsandhigherADCvalues. Significantlyhighsignal,segmentationlinearlowsignal,lacesignandgyrus-likestructurearecommonlyobservedonT2WI.Delayed mass-likeenhancementpatternismorecommon.ThesecharacteristicscouldcontributetothediagnosisofHPTC.