1.The study of disease-causative gene for primary open angle glaucoma pedigree in Chongqing
Xiangge HE ; Ting LIU ; Shihong LI ; Zhanmei LI
Ophthalmology in China 1993;0(01):-
The pathogenesis of the primary open angle glaucoma(POAG)has not been understood completely,but the genetic factors been generally considered as an important role in POAG's development.Maping the disease-causative gene by linkage analysis at POAG family that consistent with Mendelian feature of autosomal dominant inheritance,two POAG families located in Chongqing Zhongxian county were studied at the same time by the Da-Ping Hospital of the third Military Medical College and Human Molecular Biology and Genetics Laboratory of Sichuan Provincial People's Hospital.The disease-causative gene for POAG at two families were mapped to chromosome 2p1S-p16 that is overlapped by the Glaucoma 1,openangle,H(GLC1H)locus for adult-onset POAG by Suriyapperuma SP,etc,in 2007.The locus was first found in Chinese,but age of patients were younger and patient's conditions more serious.Haplotype analysis in these two families demonstrated that they shared the same disease haplotype,suggesting they have inherited the mutation fiom a common founder.Even more exists OPTN and CYP1B1 gene mutation at family Li.It was possiblly related to their severity phenotype.
2.Recent advance in the discovery of allosteric inhibitors binding to the AMP site of fructose-1,6-bisphosphatase.
Zhanmei LI ; Jianbo BIE ; Hongrui SONG ; Bailing XU
Acta Pharmaceutica Sinica 2011;46(11):1291-300
Fructose-1, 6-bisphosphatase (FBPase), a rate-limiting enzyme involved in the pathway of gluconeogenesis, can catalyze the hydrolysis of fructose-1, 6-bisphosphate to fructose-6-phosphate. Upon inhibiting the activity of FBPase, the production of endogenous glucose can be decreased and the level of blood glucose lowered. Therefore, inhibitors of FBPase are expected to be novel potential therapeutics for the treatment of type II diabetes. Recent research efforts were reviewed in the field of developing allosteric inhibitors interacting with the AMP binding site of FBPase.
3.The Effects of interleukin-18 on Middle Ear Inflammation in the Rat Model of Otitis Media with Effusion
Hua LIU ; Shouqin ZHAO ; Zhanmei GAO ; Erzhong FAN ; Jie LI ; Yang SONG
Journal of Audiology and Speech Pathology 2014;(1):76-80
Objective To investigated the effects of IL -18 on middle ear allergic inflammation in rat model of OME .Methods Eighteen SD rats were randomly divided into three group :group A(control group ,n=12 ears) , group B (OME model group ,n=12 ears) ,group C (IL -18 injectiion group ,n=12 ears) .The rat model of OME was established by sensitizing with ovalbumin (OVA) and later challenging in tympanic bullae .Recombinant rat IL-18 (1 μg ,+0 .2 ml saline ,) were injected in group C at 1 ,2 ,7 ,8 ,15 ,16 day .At the same time sacle ,0 .2 ml sa-line ,instead of IL -18 ,were intraperitoneal injection in group A and B .The morphologic changes of the middle ear epithelial cells and inflammatory cells infiltration were observed under light microscope .The level of IFN -γand IL-4 in tympanic lavage fluid(TLF) were determined by ELISA .Results Pathological examination showed that middle ear mucosa inflammation and eosinophil infiltration in group C were no less severe than group B .The numbers of neutrophils in group C increased significantly compraring with group B (P<0 .05) .Numbers of eosinophils in group C were slightly increased comparing with group B (P>0 .05) ,while significantly greater than that in group A (P<0 .05) .ELISA showed that the level of IFN -γ in group C was stronger than that in group B and A (both P<0 .05) .As compared to the group A ,the expression of IL -4 in group B and group C were remarkably stronger (both P<0 .05) ,no significant difference was found between group B and group C (P>0 .05) .Addtionally ,there was no significant difference in the ratio of Th1 /Th2(IFN -γ/IL -4)between group B and group C (P>0 .05) . Conclusion IL -18 acts as an immune regulatory factors ,significantly increases Th1 cytokine IFN -γ.Although to some extent alleviate the OME rat middle ear Th1 /Th2 imbalance ,there is still excessive activation of Th cells . Th1 and Th2 cells factor are excessive for the secretion disorder of the immune response status .The OME rat mid-dle ear allergic inflammation has not been fundamentally alleviated ,the underlying mechamism should be further studied .