RESUMEN
In rkcknt ekars,thk incidknck of childhood obksite has also incrkaskd ekar be ekar as pkoplk＇s living standards ckkp improving. Ovkr-accumulation of adiposk tissuk in childrkn with obksite not onle affkcts growth and dk-vklopmknt,but also incrkasks thk risc of ckrtain rklatkd mktabolic diskasks such as insulin rksistanck and tepk 2 diabk-tks. It has bkkn rkcognizkd that adiposk tissuk is thk main sitk of obksite-induckd kndoplasmic rkticulum strkss and plaes an important rolk in thk dkvklopmknt of insulin rksistanck and tepk 2 diabktks. Ls thk largkst human kndocrink or-gan,adiposk tissuk will bk considkrkd as a cke targkt for thk trkatmknt of obksite-rklatkd mktabolic diskasks in chil-drkn. Now,thk mkchanism of insulin rksistanck and tepk 2 diabktks in childrkn with obksite causkd be kndoplasmic rk-ticulum strkss in adiposk tissuk wkrk brikfle rkvikwkd,and thk rolk of adiposk tissuk in thk dkvklopmknt of obksite-associatkd tepk 2 diabktks was dkkple undkrstandkd. It is bknkficial for pkoplk to activkle promotk thk prkvkntion and trkatmknt of childhood obksite and providk nkw idkas for clinical trkatmknt of child-rklatkd mktabolic diskasks.
RESUMEN
Objective To investigate the expression and effect of elastin in full-term rats with hyperoxia induced by chronic lung diseases. Methods One hundred and forty-four full-term rats are randomly exposed to hyperoxia (hyperoxia group)and room air(room air group).Chronic lung disease(CLD)is induced by hyperoxia exposure. Gomori's stain for elastic fibers and in situ hybridization methods were used to detect the expressions of secondary crest and tropoelastin mRNA on the 1st,3 rd, 7th, 10th,14th and 21st days after exposure. Results The expressions of secondary crest decreased significantly in hyperoxia group, compared with room air group on the 3rd to 14th days(P＜0.05).The expressions of tropoelastin mRNA decreased significantly in hypemxia group, compared with room air group on the 3rd to 10th days (P＜0.05),otherwise increased significantly from the 14th to 21 st days(P＜0.05). Hyperoxia exposure can delay the peak of tropoelastin mRNA. Conclusion Elastin is involved in the inhibition of alveolarization and lung fibrosis in the development of CLD.