鹰嘴豆芽提取物对Caco-2细胞凋亡的作用

目的研究鹰嘴豆芽乙醇提取物（CSE）对人结肠腺癌Caco-2细胞增殖及细胞凋亡的影响。方法提取鹰嘴豆芽的活性成分并测定含量;MTT法观察提取物对Caco-2细胞增殖的影响;透射电镜观察细胞超微结构;琼脂糖凝胶电泳法进行细胞凋亡的DNA分析;流式细胞术检测凋亡情况。结果 CSE含23.53%皂苷、14.73%异黄酮;不同浓度的CSE对Caco-2细胞均有一定的增殖抑制作用,且呈量效和时效关系;细胞出现染色质边移和凋亡小体;DNA电泳呈现梯度条带,表明CSE可诱导Caco-2细胞凋亡;3、5、10μg/ml的CSE作用后,细胞凋亡率分别为32.6%、68.8%、73.9%,与对照组（0.9%）比较差异显著（P〈0.05）。结论 CSE可通过诱导细胞凋亡而抑制人结肠腺癌株Caco-2细胞的生长,为鹰嘴豆应用于结肠癌的临床治疗和预防提供了理论依据。     

孤立性肺结节的CT诊断

目的分析孤立性肺结节(SPN)的CT征象,并提高诊断水平。方法回顾性分析经临床和病理证实的40例SPN的CT表现,其中周围型肺癌20例,结核球8例,炎性假瘤8例,错构瘤2例,肺AVM和支气管囊肿各1例,均经胸部CT平扫。30例同时行CT增强,包括周围型肺癌15例,结核球6例,炎性假瘤6例,错构瘤、支气管囊肿及肺AVM各1例。结果长、短毛刺、深分叶及卫星病灶在良、恶性结节组间有显著差异(P<0.05);恶性SPN强化值大于等于30 HU,良性SPN强化值小于30 HU,二者间有统计学差异(P<0.05)。结论 SPN的CT表现多种多样,良恶性结节之间的表现存在许多重叠,特征性的表现很少,需要综合分析这些征象的形态学及强化表现,并密切结合临床及相关实验室检查,才能尽早做出准确诊断。     

基层医院动脉性出血急诊介入治疗的临床应用

目的 探讨动脉性出血急诊介入治疗在基层医院的临床应用.方法 对22例不同病因、部位引起的动脉性出血于数字胃肠机上行急诊介入栓塞治疗.结果 所有患者在行动脉性栓塞治疗后立即止血,其中20例一次性成功止血,有效率91%,无器官坏死等并发症.结论 急诊动脉性出血在基层医院行急诊介入栓塞治疗是可行的.     

寻常型银屑病患者BMD、ALP、Ca、P、TRACP-5b的检测及其意义

目的检测寻常型银屑病患者骨代谢生化指标及骨密度的情况,以了解寻常型银屑病患者的骨代谢异常状况。方法采用双能X线吸收法对48例寻常型银屑病患者(实验组)和40例健康对照者(对照组)行腰椎、股骨颈、左前臂骨密度检测;在相同条件下用贝克曼自动生化分析仪检测两组血液中ALP、Ca、P的浓度;ELSIA法检测两组血清中抗酒石酸酸性磷酸酶-5b(TRACP-5b)的浓度。结果寻常型银屑病患者血清TRACP-5b、ALP的浓度明显高于对照组(P<0.05),差异具有统计学意义;血清Ca浓度较正常对照组低,差异有统计学意义(P<0.05);血清P的浓度和正常对照组比较差异无统计学意义(P>0.05),腰椎、股骨颈、左前臂的骨密度及T值与对照组比较,具有统计学意义(P<0.05)。结论寻常型银屑病患者骨形成和骨吸收相关酶较正常人的血清水平升高,骨密度较正常人降低,说明寻常型银屑病患者骨代谢异常并已致骨量减少。血钙异常可能是寻常型银屑病骨代谢异常的原因之一,而血P在寻常型银屑病骨代谢异常中无影响。     

Administration of tissue plasminogen activator without coagulation results in a Chinese population

Routine coagulation test before intravenous tissue plasminogen activator (tPA) use increases the door to needle time (DNT). We sought to evaluate the safety of tPA use without coagulation results and its impact on prognosis. In our stroke registry, tPA was delivered with coagulation results from December 2015 to April 2016 and without coagulation results from May 2016 to December 2016. Differences of demographics, clinical characteristic, and prognosis between these two groups were analyzed. In addition, logistic regression analysis was conducted to identify predictors for DNT of over 60 min. A total of 201 stroke patients were included in the final analysis. Of these, 81 patients received tPA with coagulation results and 120 patients without coagulation results. Only one (0.8%) patient with abnormal coagulation results met the exclusion criteria of tPA use in patients without coagulation results. The difference of DNT between groups with (mean, 61.7 min) and without (mean, 41.9 min) coagulation results was significant (P?=?0.00). The group without coagulation results had a higher rate of favorable 90-day outcome (74.2 vs 70.4%) and lower rates of symptomatic intracranial hemorrhage/nonintracranial hemorrhage (4.9 and 22.2% vs 1.7 and 19.2%) than the group with coagulation results did; these differences were not statistically significant. In multivariate analysis, only tPA use with coagulation results was the predictor for DNT of over 60 min (P?=?0.0030, OR?=?2.44, 95% CI 1.28–4.65). The present study suggests that tPA could be delivered safely without coagulation results in patients without suspected coagulopathy, and avoiding coagulation tests reduces significantly the DNT interval.     

High expression of cyclooxygenase-2 in uterine fibroids and its correlation with cell proliferation

Objective

To investigate the expression of cyclooxygenase-2 (COX-2) in uterine fibroids and healthy uterine smooth muscle as well as its role in the pathogenesis of uterine fibroids.

Methods

We collected uterine fibroid tissues and their paired adjacent healthy uterine smooth muscle tissues from 30 cases of uterine fibroids. We used immunohistochemistry and quantitative real-time PCR, as well as western blot to detect COX-2 expression. Using the COX-2 inhibitors NS-398 and celecoxib, we observed the response to the inhibitors in the healthy and fibroid smooth muscle cell pairs.

Results

COX-2 was detected by immunohistochemistry in both uterine fibroids and uterine smooth muscle, with higher immunoreactivity in uterine fibroids; the positive index of the smooth muscle cells was 11.90 and the positive index of uterine fibroids cells was 46.50 (P < 0.05). The expression of COX-2 mRNA in uterine fibroids was higher (0.122 ± 0.062) than in normal smooth muscle tissue (0.025 ± 0.009; P < 0.05). Also, the western blot results showed that COX-2 expression was significantly higher in uterine fibroid cases, as compared to the expression in uterine smooth muscle. Immunofluorescence showed that the occurrence of COX-2 was obviously higher in smooth muscle cells of uterine fibroids than in the healthy smooth muscle cells. NS-398 or celecoxib significantly inhibited the proliferation of smooth muscle cells of uterine fibroids, but did not inhibit the proliferation of healthy smooth muscle cells. Accordingly, NS-398 or celecoxib significantly reduced the expression of the downstream metabolite of COX-2, PGE2, in the smooth muscle cells of uterine fibroids, but not in healthy smooth muscle cells.

Conclusion

COX-2 expression in uterine fibroids was significantly higher than in healthy uterine smooth muscles. The inhibition of COX-2 activity significantly reduced the proliferation of smooth muscle cells of the uterine fibroids, suggesting that COX-2 plays an important role in the pathogenesis of uterine fibroids.     

Nd:YAG激光治疗IOL植入术后后发性白内障的临床探讨

目的:探讨Nd:YAG激光治疗人工晶状体植入术后后发性白内障的方法和效果。方法:应用Nd:YAG激光对48例51眼后房型人工晶状体植入术后后囊混浊行后囊膜切开术。结果:后囊膜一次性切开成功率100%,增视率94%。结论:激光是治疗后发性白内障安全、有效的方法。根据最佳治疗时机,正确操作和预防并发症是治疗的关键。     

Protective effect of emodin on renal interstitial fibrosis in mice of unilateral ureteral obstruction via PI3K/Akt/mTOR signaling pathway

Objective To investigate the effect and mechanism of emodin (EM) in renal interstitial fibrosis of unilateral ureteral obstruction (UUO) mice. Methods Male C57BL/6J mice were randomly divided into 4 groups, including sham operation group (n=8), UUO operation group (n=8), UUO operation+losartan (LST) group (n=8) and UUO operation+EM group (n=8). The mice in each group were ingested the suspensions by gavage for 14 days after surgery. Mice in UUO+LST and UUO+EM groups were given 10 mg?kg-1?d-1 LST and 20 mg?kg-1?d-1 EM, respectively. LST and EM were mixed with 0.5% sodium carboxymethyl cellulose. Mice in sham group and UUO group were given 0.5% sodium carboxymethyl cellulose. The mice were sacrificed at the 14th day. Interstitial fibrosis was observed by HE, Masson and PAS stain. Real-time PCR was used to detect LC3, Beclin-1 and mTOR mRNA. Protein expressions of TGF-β1, α-SMA, E-cadherin, LC3, Beclin-1, PI3K, p-Akt and mTOR were detected by Western blotting. The autophagy was observed with transmission electron microscopy in the renal tissue. Results Compared with sham mice, UUO mice at the 14th day displayed obvious renal fibrosis. Meanwhile, UUO mice had increased expressions of TGF-β1 and α-SMA (all P＜0.01), and decreased expressions of E-cadherin (P＜0.01). Their renal expressions of PI3K, p-Akt and mTOR were also raised (all P＜0.01). Compared with those in UUO group, in UUO+LST group and UUO+EM group, expressions of autophagy protein LC3 and Beclin-1 were increased (all P＜0.01), and the number of autophagic was increased. Additionally, expressions of TGF-β1 and α-SMA were reduced in UUO+LST group and UUO+EM group (all P＜0.01), while the expression of E-cadherin was increased by emodin treatment (P＜0.05). And expressions of PI3K, p-Akt and mTOR were decreased in UUO+LST group and UUO+EM group (all P＜0.05), meanwhile renal tissue fibrosis significantly reduced. Conclusions Emodin can promote autophagy, ameliorate renal interstitial fibrosis and protect renal function through PI3K/Akt/mTOR signaling pathway.     

垂体促甲状腺激素分泌瘤5例报告并文献复习

目的 探讨垂体促甲状腺激素(TSH)分泌瘤所致中枢性甲亢的临床特点.方法 对1992～2006年在解放军总医院确诊和治疗的5例垂体TSH分泌瘤患者的临床资料进行回顾性分析,并结合文献资料进行总结.5例患者中男性4例、女性1例,平均年龄39.8(26～51)岁,平均病程为5.84(0.6～16)年.结果 5例垂体TSH分泌瘤占解放军总医院同期诊断的垂体腺瘤的0.33%(5/1 500).所有患者均伴有甲状腺毒症,其中4例为首发症状,例为视物模糊,所有患者均没有视野缺损.确诊之前误诊为原发性甲亢接受抗甲状腺药物治疗者3例,治疗6～16年,其中1例曾2次行甲状腺手术治疗.5例患者均有甲状腺激素水平增高,同时不伴TSH抑制(3.94～54.7mU/L);3例患者行促甲状腺激素释放激素(TRH)兴奋TSH试验,例无反应、1例呈过强反应.鞍区MRI检查4例为大腺瘤(直径1.5～3.6cm),例为微腺瘤.4例大腺瘤患者均行经口鼻蝶入路垂体瘤切除术,术后病理均证实为垂体腺瘤,例术后联合垂体放射治疗.术后1～2周复查血清甲状腺激素和TSH水平正常,随访3～32个月甲状腺功能仍正常.结论 甲状腺毒症患者血清TSH水平不被抑制时应警惕垂体TSH分泌瘤的存在,鞍区影像学检查可以进一步明确诊断,垂体TSH分泌瘤经口鼻蝶入路垂体腺瘤切除术联合垂体放射治疗可获得良好疗效.