Observation of the retinal arteriovenous circulation time of patients with different stages of diabetic retinopathy / 国际眼科杂志(Guoji Yanke Zazhi)

AIM:To observe whether differences exist in the retinal arteriovenous circulation time of the patients with diabetic retinopathy and exploring whether there is any correlation between the injured degree of retinal vessel and the microcirculation time.METHODS:The study was conducted from the March 2016 to the March 2017 in order to analyze the clinical data on 60 eyes of 60 patients who were diagnosed with diabetic retinopathy by Xuanwu Hospital of Capital Medical University.According to the result,patients were divided into mild and moderate nonproliferative diabetic retinopathy (NPDR) group,severe NPDR group and proliferative diabetic retinopathy(PDR) group with 20 eyes respectively.Then we recorded the retinal arterial developing time of the three groups,namely arm-to-retinal circulation time (A1),retinal arterial branch filling time (A2),retinal venous branch laminar flow time (V1),retinal venous branch filling time (V2).RESULTS:The findings showed that there was no statistical difference among 3 groups in the retinal arterial passage time(A2-A1) (F=1.642,P=0.157).Retinal capillary passage time (V1-A2),retinal vein passage time (V2-V1),retinal artery and vein passage time (V2-A1) were compared between the three groups,the difference was statistically significant (F=5.794,5.180,5.564,P=0.007,0.009,0.008).The PDR group was significantly longer than the mild moderate and severe NPDR group,and the severe NPDR group was significantly longer than the mild and moderate NPDR group.CONCLUSION:The duration of DR is longer,the degree is more severely.The destruction of retinal capillaries is more serious,the time of retinal microcirculation is longer.

Application of five formulas in the elderly cataract patients with long axial length / 国际眼科杂志(Guoji Yanke Zazhi)

AIM: To compare the accuracy of intraocular lens(IOL)power calculations by using five formulas(Haigis, SRK-T, Hoffer Q, Holladay-1, SRK-Ⅱ)in eyes with long axial lengths in order to improve the accuracy of predicating IOL powers.METHODS: Fifty-one eyes of 51 cases of age-related cataract and with mild long axial(24.5mm27mm) were collected who`s optical biometry were performed by the Zeiss IOL Master500 before operation.They underwent regular phacoemulsification and posterior chamber IOL implantation.The actual postoperative refraction was measured with the methods of phoropter and subjective optometry 3mo after surgery.Then we compared the differences of the predicted and actual postoperative refraction of the five formulas in each group.RESULTS: In the mild axial lengths cases, the differences between SRK Ⅱ formula and the other four formulas were statistically significant (P0.05).In the moderate and severe long axial lengths cases, the differences between SRK Ⅱ formula and the other four formulas were statistically significant (P0.05).The differences of all the five formulas between the two groups were statistically significant (P<0.05).CONCLUSION: In the mild axial lengths cases, Haigis, SRK-T, Hoffer Q, Holladay-1 performed well.In the moderate and severe long axial lengths cases, Haigis, SRK-T and Holladay-1 performed better than other formulas.The accuracy of all the five formulas decreases as the axial length getting longer.

Study of biological measurement parameters of anterior segment in primary acute angle-closure glaucoma / 国际眼科杂志(Guoji Yanke Zazhi)

AlM:To investigate biological measurement parameters of anterior segment in acute angle- closure glaucoma ( AACG) .METHODS:Forty-six eyes of 46 patients with AACG and 52 eyes of 52 patients with shallow anterior chamber and 50 eyes of 50 normal individuals were examined. The parameters of anterior segment including chamber crowd rate (CCR), lens thickness (LT), lens position (LP) and anterior chamber depth ( ACD ) were measured by A-ultrasound according to different ages in each group. The data were performed statistical analysis in three groups.RESULTS: ln each age range group (≥50 ~ 59 years old, ≥60 ~ 69 years old, ≥70 years old ) , statistically significant differences in three groups ( AACG, shallow anterior chamber group and the controls ) were found in CCR, LT, LP, ACD (P 0. 05 ) between AACG and shallow anterior chamber group in each age range group.CONCLUSlON: CCR can be used as the index of evaluating crowding state of anterior segment in AACG patients and the sensitivity is better than LT and LP.

Application effect of surgical simulator to improve the microsurgical skills in junior ophthalmologist / 国际眼科杂志(Guoji Yanke Zazhi)

AlM: To discuss the application effect of surgical simulator to improve the microsurgical skills in junior ophthalmologist. METHODS: Lecture teaching, training in surgical simulator and operation in animal eyes were received in all these ophthalmologists. Results of the ability of operation in cataract surgery after this training were analyzed. RESULTS: After taught theory, students completed cataract surgical procedures on simulator and the mean test score was 75. 91 ± 6. 53 points. After trained on simulator repeatedly, the mean test score was 85. 57±4. 64 points. There was statistically significant difference ( P<0. 01) . During the third stage of practicing on animal eyes, the score was 89. 77 ± 7. 61 points, there was statistically significant difference compared with former two stages (P<0. 05).CONCLUSlON: Comprehensive training can improve microsurgical skills of junior ophthalmologist, but the long effect need to be observed.

Synthesis and anticonvulsant activity evaluation of 3-alkoxy-4-[4- [hexyloxy/heptyloxy]phenyl]-4H-1,2,4 -triazole

A series of 3-alkoxy-4-[4-[hexyloxy/heptyloxy] phenyl]-4H-1,2,4-triazole was synthesized. The anticonvulsant effect and neurotoxicity of the compounds were calculated with maximal electroshock [MES] test and rotarod tests with intraperitoneally injected mice. Among the synthesized compounds, compound 3-heptyloxy-4-[4-[hexyloxy] phenyl]-4H-1,2,4-triazole [5f] was the most active one and also had the lowest toxicity. In the anti-MES potency test, it showed median effective dose [ED[50]] of 37.3 mg/Kg, median toxicity dose [TD[50]] of 422.5 mg/Kg, and the protective index [PI] of 11.3 which is much greater than the reference drug carbamazepine with PI value of 6.4. As well as demonstrating the anti-MES efficacy of compound 5f, its potency against seizures induced by pentylenetetrazole, 3-mercaptopropionic acid, and bicuculline were also established, with the results suggesting that GABA-mediated mechanisms might be involved in its anticonvulsant activity, such as enhancing of GABAergic neurotransmission or activity, activate GAD or inhibit GABA-T, and GABA[A]-mediated mechanisms

Preliminary research on the pathological role of cathepsin-B in subcutaneous heteroplastic pancreatic carcinoma in nude mice / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Cathespin-B (cath-B) is an important proteolytic enzyme involved in the disease course of invasion in many types of cancer. Cath-B expression in subcutaneous heteroplastic pancreatic carcinoma in nude mice has not been studied. We investigated the role of cath-B in a model of heteroplastic pancreatic carcinoma in BALB/c nude mice.</p><p><b>METHODS</b>Thirty-two six-week-old female BALB/c nude mice were equally divided into four groups. PANC-1 cells were inoculated subcutaneously in the left axillary region. Besides volume, weight of subcutaneous tumor, and change in body weight, cath-B expression in each group was measured by immunohistochemical staining, PCR and Western blotting. Its relationship to microvessel density (MVD), CD44v6, and placenta growth factor (PLGF) was also examined. CA-074Me, a specific inhibitor of cath-B, was injected intraperitoneally (i.p.) at different stages of tumor growth in group B and C. Gemcitabine (GEM), was also injected (i.p.) in group D to compare anti-tumor efficacy with CA-074Me.</p><p><b>RESULTS</b>Expression of cath-B at different levels was related to tumor growth, MVD, and PLGF expression. In group A (control group), cath-B expression was enhanced more than that seen in other groups. CA-074Me clearly inhibited cath-B expression and tumor growth in group B. There was no difference between group C and D with respect to anti-tumor effect.</p><p><b>CONCLUSIONS</b>Cath-B correlates with the growth and angiogenesis of tumors, but not with the adhesion induced by CD44v6. CA-074Me clearly inhibited cath-B expression and demonstrated an anti-neoplastic and anti-angiogenesis effect.</p>

Effects of duration of early organ dysfunction and therapeutic strategy on outcomes in patients with severe acute pancreatitis / 中华外科杂志

<p><b>OBJECTIVE</b>To investigate the characteristics of early organ dysfunction in patients with severe acute pancreatitis (SAP) and therapeutic regimens.</p><p><b>METHODS</b>A total of consecutive 74 patients with a confirmed diagnosis of SAP admitted between January 2000 and June 2005 were divided into two groups, transient group (<or=72 h, n = 20) and persistent group (>72 h, n = 54). The differences in local complications and mortality were compared between the two groups.</p><p><b>RESULTS</b>Among the seventy-four SAP patients, the incidence rate of cardiovascular dysfunction was 80%, respiratory dysfunction 47%, hepatic dysfunction 37% and renal dysfunction 20%. The incidence of multiple organ dysfunction in transient group was much lower than that in persistent group (P < 0.01). The local complications and death in transient group patients were less than that in persistent group (P = 0.038, P = 0.054, respectively), irrespective of onset of organ dysfunction on admission or later during the first week.</p><p><b>CONCLUSIONS</b>The important determinant of risk of death from SAP is the persistence of early organ dysfunction for more than 72 h. Consequently, aggressively ameliorating the blood perfusion and the oxygenation in tissue is the priority in reducing organ dysfunction or shortening the duration of organ dysfunction.</p>

The expression of Cyclin D1 modulated by somatotropin on human pancreas cancer cell lines Bxpc-3 / 中华外科杂志

<p><b>OBJECTIVE</b>To observe the growth effect of somatostapin on human pancreas cancer lines Bxpc-3.</p><p><b>METHODS</b>The Bxpc-3 pancreas cancer cells were treated with Somatotropin. The cells hyperplasia were detected by MTT and were observed apoptosis cells determinated quantitatively by TUNEL, quantify immune fluoresence double marked the proliferation cells and apoptosis cells, the expression of Cyclin D1 detected by immunohistochemical.</p><p><b>RESULTS</b>The growth effect of pancrea cancer cells were limited by 10(-7) M, 10(-8) M, 10(-9) M Somatotropin on 2 day. The limited effect was decreased from 3 day. The cells proliferation were increased by somotostapin on 4day to 5day. The relationship between the expression of Cyclin D1 and apoptosis was negative correlation and the cells hyperplasia was positive correlation in Bxpc-3 cell line.</p><p><b>CONCLUSION</b>From the cell study we knew the expression of Cyclin D1 reflected the prolefiration of pancreas cancer cells.</p>