RESUMEN

KEY MESSAGE: Our results showed that GbIRL1 belongs to the PCBER protein family. Besides, IRL1 gene was a novel gene regulating lignin change and also effecting the accumulation of flavonoids in Ginkgo. A cDNA encoding the IFR-like protein was isolated from the leaves of Ginkgo biloba L., designated as GbIRL1 (Accession no. KC244282). The cDNA of GbIRL1 was 1,203 bp containing a 921 bp open reading frame encoding a polypeptide of 306 amino acids. Comparative and bioinformatic analyses revealed that GbIRL1 showed extensive homology with IFLs from other gymnosperm species. Phylogenetic tree analysis revealed that GbIRL1 shared the same ancestor in evolution with other PCBERs protein and had a further relationship with other gymnosperm species. The recombinant protein was successfully expressed in E. coli strain with pET-28a vector. The vitro enzyme activity assay by HPLC indicated that recombinant GbIRL1 protein could catalyze the formation the TDDC, IDDDC from DDDC, DDC. Tissue expression pattern analysis showed that GbIRL1 was constitutively expressed in stem and roots, especially in the parts of the pest and fungal infection, with the lower expression being found in 1- or 2-year old stem. The increased expression of GbIRL1 was detected when the seedlings were treated with Ultraviole-B, ALA, wounding and ethephon, abscisic acid, salicylic acid. Correlation analysis between GbIRL1 activity and flavonoid accumulation during Ginkgo leaf growth indicated that GbIRL1 might be the rate-limiting enzyme in the biosynthesis pathway of flavonoids in Ginkgo leaves. Results of RT-PCR analysis showed that the transcription level of change in GbIRL1 power correlated with flavonoid contents, suggesting IRL1 gene as a novel gene regulating lignin change and also effecting the accumulation of flavonoids in Ginkgo.

Asunto(s)

Ginkgo biloba/genética , Ginkgo biloba/metabolismo , Oxidorreductasas actuantes sobre Donantes de Grupo CH-CH/genética , Oxidorreductasas actuantes sobre Donantes de Grupo CH-CH/metabolismo , Ácido Abscísico/farmacología , Clonación Molecular , Flavonoides/metabolismo , Regulación de la Expresión Génica de las Plantas , Ginkgo biloba/enzimología , Lignina/metabolismo , Datos de Secuencia Molecular , Sistemas de Lectura Abierta , Compuestos Organofosforados/farmacología , Filogenia , Proteínas de Plantas/genética , Proteínas de Plantas/metabolismo , Raíces de Plantas/enzimología , Raíces de Plantas/genética , Tallos de la Planta/enzimología , Tallos de la Planta/genética , Ácido Salicílico/farmacología , Plantones/efectos de los fármacos , Plantones/enzimología , Plantones/genética , Plantones/efectos de la radiación , Rayos Ultravioleta

RESUMEN

Objective To study the relationship between mycoplasma pneumoniae(MP) infection and children asthma,and to observe the treatment effects of macrolide antibiotics (azithromycin) on mycoplasma pneumoniae infection.Methods 250 children of respiratory disease were investigated with olimpus electron gastroscope,200 children asthma;the serum specific antibodies were determined by Diagnostic Kit for measurement of antibodies to mycoplasma pneumoniae (Passive Particle Agglutination) ;and the eosinophilic grannlocytes were serologically analyzed in children with recent asthma.Random selection 42 MP infection positive to macrolides antibiotics (azithromycin) treatment.Results 44 MP infection positive,200 children asthma cases had MP infection with 21％ (42/200) MP positive,the specific antibody titers to MP showed significant difference in children with recent asthma compared with those in the contol group ( x2 =6.14,P ＜ 0.05 ),and correlated with the count of eosinophilic granulocy positively ( r =0.603,P ＜ 0.05) ;The positive rates of specific antibody,infection with MP were significantly higher than those in the control group( t =4.38,P ＜ 0.05 ).MP infection positive group with azithromycin treatment effect is significantly higher than that of cefuroxime group ( x2 =16.18,P ＜ 0.05 ).Conclusion MP infection is closely associated with the pathogenesis of children asthma;and early routine testing for MP antibodies.Macrolides antibiotics can eliminate MP infection,a new generation of macrolides antibiotics(azithromycin) is more advantageous to the control of acute attack of asthma.

RESUMEN

Objective To evaluate the efficacy of inhalation of budesonide bitween suspension and aerosol in the treatment of infant asthma. Methods 80 patients less than 3 years old were divided in three groups randomly,in group A the patients received budesonide suspension inhalation therapy,in group B the patients received budesonide aeroso inhalation therapy, in group C the patients received route treament. The patients were followed 1,3,6,12 months after teeament,symptom assessment scores, acute episode of asthma and administration of medication were compared beteen two groups. Results Compared with group C, symptom assessment scores became lower (P <0.01 ) ,acute episode of asthma reduced and use of receptor β2 receptor agonist and steroid reduced in group A and B(P<0.01);after 1,3,6 montha, the indicators observed in group A was better than in group B(P< 0.05),but there was no difference between two group after 12 months( P > 0.05). Conclusion Budesonide inhalaton is effec-tire in the treatment of asthma, in patients with infant asthma, budesonide suspension aerosol inhalation should be the first choice of treatment.