Clinical Studies in Patients with HLA-B 27 Positive Uveitis

It is well known that HLA-B 27-associated uveitis is mostly anterior uveitis and has systemic manifestations.20 Patients [27 eyes]followed up at department of Ophthalmology of Kangnam St.Mary`s hospital, Catholic University Medical College from November 1989 to June 1998, were studied to delineate the clinical manifestations, treatments and prognosis in patients with HLA-B 27-associated uveitis.An HLA B27 associated systemic disorder was present in 10 patients, all of whom were ankylosing spondylitis. Systemic manifestations occurred in 19 patients included oral ulcer in 7 patients, genital ulcer in 3 patients, arthralgia in 16 patients, and skin lesion in 3 patients.Among the total 27 eyes, anterior uveitis was noted in 23 eyes and posterior segment involvement occurred in 4 eyes.The findings of posterior segment involvement included retinal vasulitis in 2 eyes and chorioretinitis in 1 eyes.Severe vitritis occurred in 1 eyes.Most of anterior uveitis was treated with topical steroid eyedrops and periocular steroid injections.In 3 eyes of posterior segment involvement, systemic steroid therapy was required for control of inflammation.After treatment, visual acuity in 23 eyes among 27 eyes was 20/40 or better.And, visual acuity in 4 eyes of posterior segment involvement was 20/25 or better following medical treatment.In conclusion, although HLA-B 27-associated uveitis was mostly related to anterior uveitis, posterior segment manifestations may be occurred in some patients;these patients may require the use of aggressive systemic immunosuppressive therapy to control inflammation and preserve vision.

The rapeutic Effects of Low Dose Triple Agents Steroid, Cyclosporine and Azathiprineon Refractory Uveitis

Immunosuppressive agent has been used as a therapeutic agent for Endogeneous posterior uveitis[EPU]. But serious side effect of steriod or cyclosporine and frequent recurrence of ocular inflammation warrant the addition of other immunosuppressive agents. In this study, we evaluated the therapeutic effectiveness of low dose triple therapy using steroid, cyclosporine and azathioprine when combination therapy with steroid and cyclosporine had failed. We reviewed the records of 10 Behcet's patients[18 eyes]and 2 sympathetic ophthalmia patients[2 eyes]who had been resistant to steroid and cyclosporine combination therapy. The median follow up duration of triple therapy was 16.3 months. Recurrence, severity of inflammation, systemic manifestations associated with Behcet's disease, and side effect of therapeutic agents were evaluated. There was a significantly decrease in the frequency[0.37/month during pretriple therapy and 0.14/month after triple therapy]and severity of ocular inflammation[p<0.01]. The frequency and severity of systemic manifestations also decreased. Visual acuity remained stable in 7 eyes[35%]and improved in 13 eyes[65%]. No serious side effects or newly developed side effect were developed during triple therapy except reversible mild anemia in 1 patient. The results of our study suggest that triple agent immunosuppressive therapy is well tolerated and appears to be effective for the severe uveitis which is refraction to steroid and cyclosporine combination therapy.

The Expression of Bcl-2, Bax, and p53 Developmental Rat Eye

To investigate the tissue-specific and stage-specific expressions of porteins relatedto cell death or survival in development of rat eye, Bcl-2, Bax and p53 as well as PCNA were studied from 14th day of embryonic stage(E14) to 22th day of opstnatal stage(P22) every other day in Spragur-Dawley(SD) rats. Expression of these gene proteins was studied by immunohistochemistry. At E14, Bcl-2, Bax and PCNA were expressed on the surface ectoderm and anterior lens epithelium. p53 was highly expressed in theposterior lens epithelium and in the inner layer of retina. PCNA was highly expressed in the middle layer of retina. In postnatal stage, In the retina, Bax and PCNA were expressed throughout whole layers and p53 was stained in the middle layer, However, Bax, p53 and PCNA disappeared after P14, wherase Bcl-2 still remained by P22. In the lens, p53 expression was detected by P14 and then disappeared. In the iris. Bax and PCNA were highly expressed between P0 and P22. These results indicate that Bcl-2, Bax and p53 may contribute to the development of rat eye. The expressions of Bcl-2, and Bax, p53 are not conducted step by step but overlapped and expressed in different stages depending on ocular tissue.

Analysis of Typing in Patients with Uveitis in Korean Population

In order to evaluate association of particular HLA typing with certain uveitis in Korean population, HLA antigens were analyzed in 114 uneitis patients(acute anterior uveitis: 32 cases, Behcet`s disease: 25 cases, intermediate uveitis: 19 cases, Vogt-Koyanagi-Harada (V-K-H) syndrome: 10 cases, retinal vasculitis: 12 cases, Eale`s disease: 3 cases, posterior uveitis: 9 cases, pan.uveitis: 4 cases). The stronger association between acute anterior uveitis and HLA-B27 was statistically significant, and this result was similar to reports in other ethnic groups. Also, the association between V-K-H syndrome and HLA-DR4 showed same results. But the high frequency of HLA-DR7 in the patients with V-K-H syndrome was unque in patients of Korean popjlation and statistically significant. The association between HLA-A2 and posterior uveitis was high in patients of Korean population and statistically significant. Behcet`s disease was stronger association with HLA-B51 but not statistically significant and much weaker association than reports in Japanese group. Although many similarities of associations between particular uveitis and HLA typing were detected as compared with other ethnic groups, distinctive HLA associations were demonstrated in Korean population. Additional cases and long-term follow-up are required to confirm the association with HLA typing and the relationship with prognosis including clinical and laboratory variabilities.