Adenosine is an important signaling molecule of the central nervous system (CNS). Adenosine typically released in the phosphorylated form(ATP), together with neurotransmitter, both of which are encapsulated in the synaptic vesicles. Once released into the synaptic space, adenosine molecules will bind to their three categories of receptors, namely A1 receptor (A1R), A2 receptor (A2R), A3 receptor (A3R), and therefore start G protein mediated signaling pathways, resulting in various and extensive biological effects. It has been discovered in recent years that adenosine has a certain level of anti-depression effect, although its mechanisms are yet to be elucidated. This review summarized the researches focusing on anti-depression roles of both adenosine and its receptors.

Objective To evaluate the efficacy and safety of half-dose verteporfin photodynamic therapy (PDT) for chronic central serous chorioretinopathy (CSC).Methods 35 eyes (35 patients) with chronic (or recurrent) CSC treated with half-dose verteporfin PDT.Best-corrected visual acuity(BCVA),central macular thickness (CMT) were measured before and after treatment (1,3 and 6 months).The mean BCVA was 0.28± 0.22,mean CMT was(384.5 ± 85.0) μm.The situation of subretinal fluids (SRF) absorption was observed.Results In 35 eyes,SRF of 29 eyes (82.9％) completely absorbed and 6 eyes (17.1％) not completely absorbed after one month of treatment.SRF of all eyes (100.0％) completely absorbed after three months of treatment.After 6 months of treatment,SRF of 3 eyes (8.6％) were recurrence,which might be completely absorbed when a half-dose maintenance therapy PDT was used again.The mean BCVA significantly improved to 0.14±0.13 at 1 months,0.05±0.11 at 3 months and 0.05± 0.12 at 6 months after PDT (t=5.410,7.830,7.758; P＜0.05).The mean CMT decreased to (224.3± 61.4) μm at 1 months,(199.6±32.7) μm at 3 months and (205.3±39.6) μm at 6 months after PDT (t=11.856,11.781,11.900; P＜0.05).The mean CMT of controlled 32 eyes after treatment was (198.5± 33.9) μm,much lower than the fellow eyes(232.3 ± 17.5) μm (t =-3.988,P＜0.05).Conclusions Half-dose verteporfin PDT was safe and effective in treating chronic CSC,but may cause thinning of CMT.

Objective To compare the fast blood flow density (FBFD) of intermediate choroid between endogenous Cushing syndrome (ECS) patients and healthy control subjects.Methods Thirteen eyes of 7 eligible ECS patients (ECS group) and 13 eyes of 7 gender,age,axial length matched healthy volunteers (control group) were enrolled in this study.For each subject,macular radial scan with swept source optical coherence tomography (SS-OCT) was performed and subfoveal choroidal thickness (SCT) was measured.Then 3.0 mm× 3.0 mm macular scan with SS-OCT angiography was performed,and selected blood flow image at intermediate choroid level or 1/2 SCT beneath Bruch membrane.The grayscale images were then binarized for the analysis of FBFD.Results The SCT in ECS group was (394.7±77.7) μm,which was significantly thicker than (332.1 ± 68.1) μm in control group (t=2.923,P=0.008).The FBFD of intermediate choroid in ECS group were (76.35± 14.46)％,which were significantly greater than (63.57± 13.42)％ in control group (t=2.775,P=0.01).Conclusion ECS patients had increased FBFD at intermediate choroid level compared with healthy controls.

Objective To evaluate the efficacy and safety of prompt phacoemulsification, intraocular lens implantation, visco-goniosynechialysis, combined with pseudo-pupilloplasty for refractory acute primary angle closure (APAC) with atonic dilated pupil and to describe a feasible method of pupilloplasty. Methods A consecutive series of refractory APAC patients who had atonic dilated pupil and undergone prompt phacoemulsification combined with pseudo-pupilloplasty at our center were retrospectively analyzed. Pseudo-pupilloplasty referred to a method of pupilloplasty which included 4.5-mm capsulorhexis, postoperative opacification of anterior capsule residue, and ultimate pseudo-pupil formation. Preoperative and postoperative measurements included intraocular pressure (IOP), best corrected visual acuity (BCVA), and anterior chamber depth (ACD). Intraoperative and postoperative complications were documented. The process of pseudo-pupil formation was also observed. Results A total of 20 eyes of 19 APAC patients were followed up for 19.7 ± 9.8 months. IOP was lowered from preoperative 44.0 ± 9.8 mmHg to 15.5 ± 2.6 mmHg at final visit (t=11.945, P < 0.001). ACD was deepened from preoperative 1.77 ± 0.21 mm to 3.40 ± 0.20 mm at final visit (t=-27.711, P < 0.001). Twelve of 20 eyes had residual angle synechiae, whereas only 3 eyes needed anti-glaucoma medications. No severe complication was observed. All eyes had pseudo-pupil gradually formed within 3 months, accompanied with the gradual improvement of BCVA from preoperative 1.18 ± 0.55 to 0.58 ± 0.22, 0.26 ± 0.09, 0.11 ± 0.09, and 0.11 ± 0.09 at postoperative day 1, month 1, month 3, and last visit. Conclusions Prompt phacoemulsification-goniosynechialysis is effective and safe for refractory APAC with atonic dilated pupil. Pseudo-pupilloplasty is a feasible procedure for pupil reconstruction.