[Show abstract][Hide abstract] ABSTRACT: CORRESPONDENCE TO: Fang-Tian Dong. Department of Ophthalmology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China. firstname.lastname@example.org
To access the differentiation of rat mesenchymal stem cell (MSC) in the microenvironment of retinal degeneration induced by the administration of sodium iodate.
In-vitro cultured Lewis rat MSC were injected into the sub-retinal space of NaIO(3) induced retinal degeneration rat eyes (30g/L NaIO(3) 100mg/kg). To observe the trace and differentiation of MSC by immuno-fluorescent method successively in 5 weeks after the surgery.
The majority of the transplanted cells stay in retinal pigment epithelium layer and cones & rods layer. From the 2(nd) week after transplantation, the engrafted MSC express PCK and rhodopsin under fluorescent microscope.
MSC can survive mainly in the outer layer of retina in the microenvironment of retinal degeneration and differentiate forward the RPE cell and photoreceptor.
Preview · Article · Oct 2010 · International Journal of Ophthalmology
[Show abstract][Hide abstract] ABSTRACT: To assay the differentiation of rat mesenchymal stem cells (MSCs) in the microenvironment of choroidal neovascularization (CNV).
Cultured BN rat MSCs were injected into the subretinal space in 25 Argon laser-induced CNV rat. The differentiation of MSCs was traced by immunofluorescent labeling successively in 5 weeks after the surgery.
MSCs distributed on the surface of CNV in the 1st week after injection. From the 2nd week, CD31 positive MSCs were found in CNV until 5 weeks after cell injection, while rhodopsin positive MSCs in the photoreceptor layer were revealed until the 5th week after the injection.
Injected MSCs in the microenvironment of CNV can differentiate into endothelium and photoreceptor.
No preview · Article · Mar 2007 · [Zhonghua yan ke za zhi] Chinese journal of ophthalmology
[Show abstract][Hide abstract] ABSTRACT: To investigate the prevalence and the risk factors of retinopathy of prematurity (ROP).
Totally 172 premature infants who were less than 37 weeks postconceptional age, or more than 37 weeks but weighing < 2 500 g at birth, and born at PUMC hospital from May 1, 2003 to November 30, 2004, were enrolled in this study. Their fundus were routinely checked. Diagnosis and staging of ROP were performed according to the international guidelines. Another 20 mature infants were selected as the control group.
Twelve infants quitted the treatment or died. The remaining 160 infants completed the follow up. The prevalence of ROP in the premature group was 19.4%, while no ROP was found in the control group. The prevalence of ROP in subgroup with body weight < or = 2 000 g (28.4%) was significantly higher than in subgroup with body weight > 2 000 g (8.3%, chi2 = 10.217, P = 0.001) at birth. The prevalence of ROP in subgroup with postconceptional age < or = 32 weeks (42.5%) was significantly higher than in subgroup with postconceptional age > 32 weeks (11.7%, chi2 = 18.258, P = 0.000). The postconceptional age (OR = 0.959, P = 0.036) and body weight (OR = 0.999, P = 0.026) were the most important risk factors of ROP. Furthermore, blood transfusion ( OR = 0.076, P = 0.029) and Apgar score ( OR = 23.62, P = 0.012) were inversely correlated with ROP. Correlation was not found between ROP prevalence and oxygen inhalation mode, surface active substance, administration of dopamine and dexamethasone, and mother conditions.
The prevalence of ROP is higher in premature infants than in mature infants. Shorter postconceptional age and lower body weight may result in higher ROP incidence. Routine screening of fundus in premature infants may be helpful for the early detection of ROP.
No preview · Article · Aug 2006 · Zhongguo yi xue ke xue yuan xue bao. Acta Academiae Medicinae Sinicae
[Show abstract][Hide abstract] ABSTRACT: Retinopathy of prematurity (ROP) is a vasoproliferative retinopathy. Worldwide, ROP is a major cause of blindness in children. This chapter describes its risk factors, etiology, diagnosis, treatment and recent advances.
No preview · Article · Mar 2004 · Zhongguo yi xue ke xue yuan xue bao. Acta Academiae Medicinae Sinicae