ABSTRACT
@#【Objective】To form a new PTMAc- PEG- PTMAc triblock（PPP）copolymerhydrogel and to evaluate its sustained released performance and antiproliferative effects as an ocular drug carrier of Pirfenidone（PFD）【Methods】One type triblockcopolymers PPP hydrogel was chosen. The morphology of the material was evaluated by scanning electron microscopy（SEM）. The swelling properties of the PPP hydrogel was analyzed in PBS solution（37 ℃ ，pH 7.4）. The in vitro drug release of the pirfenidone loaded hydrogels were evaluated with non-dialysis method and the curves of drug release were drawed. We evaluated the adhesion，survival of human Tenon′s capsule fibroblasts（HTF）around hydrogels. The cell cytotoxicity of hydrogels and antiproliferative effects were evaluated through CCK-8 assay.【Results】The hydrogel has stable gelation conditions. The swelling rate decreased by increasing hydrogel concentration.The SEM images indicated the fibrous and porous structure. We also observed that the encapsulated pirfenidone were sustained released from hydrogels with an initial burst release at early stage（within 4 d）and then the release rate were declined for all hydrogels during the following 14 d. The PPP hydrogel can inhibit cell adhesion. The cell viability in hydrogels at four time point（24，48，72 and 96 h）were 85.7% ，93.0% ，82.0% ，81.6%. The inhibition rate of drug loaded hydrogel with two drug concentration（1 mg/mL or 2 mg/mL）are 25.8%，21.8%，55.4%，25.6%；44.6%，35.9%，55.5%，31.4%. While that of drug solution are 28.9% ，29.7% ，7.8% ，7.7%. The suppressive effects of the PFD loaded hydrogels on HTF proliferation followed a dose-dependent fashion and time-dependent fashion.【Conclusions】Such biocompatible copolymers hydrogel can be effectively used as an drug sustain released system. It can induce significant inhibition of HTF proliferation. With equal amount of drug，the inhibition effect of drug loaded gel was longer than that of drug solution.
ABSTRACT
Background Increase of lens thickness at incipient cataract is a key factor of onset of primary angle-closure glaucoma (PACG).Phacoemulsification (Phaco) or phacotrabeculectomy (Phacotrabe) have been documented to be effective for the patients of PACG associated with cataract.However,which surgery is more effective and safe is lack of evidence.Objective This study was to assess and compare the clinical effectiveness of Phaco versus Phacotrabe for PACG with cataract.Methods The relevant literature was searched electronically from the PubMed (1966 to June 2011),EMB Reviews (1966 to June 2011) and Cochrane Library (Issue 1,2011).The manually searching of relevant conference proceedings was used as the supplement.The articles of randomized controlled trial (RCT) about the clinical effectiveness of Phaco versus Phacotrabe for PACG with cataract were included.The methodology quality of included literature was graded.The analysis indexes included intraocular pressure (IOP)-lowing range,postoperative administration of glaucoma drugs,incidence of positive complication,postoperative best corrective visual acuity (BCVA) and perimetry damage.The RevMan4.2 software from Cochrane Collaboration was used for the Meta analyses.Results Three RCTs about phaco versus Phacotrabe for PACG with cataract were selected in this study with the 164 eyes of 164 cases.Meta analysis showed that the IOP-lowing range was larger in the Phacotrabe group compared to only Phaco group with the WMD of 1.17 and 95％ CI of 0.06-2.27 (P =0.040),and the drug dosage of anti-glaucoma was less in the Phacotrabe group in comparison with the Phaco group with the WMD of 0.5 and 95％ CI of 0.24-0.77 (P =0.000).However,the incidence of postoperative complication was higher in the Phacotrabe group than that of the Phaco group with the RR of 0.08 and 95％ CI of 0.02-0.33 (P =0.000).No significant difference was found in the BCVA (WMD =0,95％ CI:-0.13-0.13,P=1.00) andperimetry (WMD =1.01,95％CI:0.56-1.82,P=0.98).Conclusions Compared with Phaco,Phacotrab has a better IOP-lowing effectiveness and slightly worse safety.Phaco and Phacotrab have a fairly influencc in the postoperative BCVA and perimetry.As the sample sizes of the included trials are relatively small,more welldesigned large-scale RCTs are needed.