11β-羟化类固醇脱氢酶1促进3T3-L1前脂肪细胞分化机制

目的 探讨11β-羟化类固醇脱氢酶1（11β-HSDl）促3T3-L1前脂肪细胞分化机制及其在肥胖中的作用。方法 采用油红染色观察脂滴堆积情况;采用Western blot方法检测11β-HSD1的表达。应用氢化可的松刺激模型,采用实时定量PCR观察11β-HSD1和糖皮质激素受体（GR）表达的变化。应用实时定量PCR检测脂肪细胞分化标志基因的变化。结果 （1）油红染色显示脂滴堆积随着小鼠前脂肪细胞（3T3-L1）细胞分化过程逐渐增加。（2）在3T3-L1前脂肪细胞分化模型中（0、2、4、6、8d）,11β-HSD1蛋白水平是上调的,证实1113-HSDl蛋白分子量为34000。（3）11β-HSD1及GR的mRNA表达在分化过程中是上调的。（4）11β-HSD1对氢化可的松的刺激是时间和浓度依赖的,而氢化可的松的刺激对GR影响不大。（5）脂蛋白脂肪酶（LPL）、脂肪酸合成酶（FAS）、脂肪酸结合蛋白（aP2）在分化过程中明显上升,前脂肪细胞因子-1（Pref-1）在分化早期升高,在分化后期明显下调。结论 11β-HSDl通过受体前调节作用促进前脂肪细胞分化,参与肥胖的发生。     

糖皮质激素联合鼻内镜术治疗鼻息肉的疗效观察

目的观察糖皮质激素联合鼻内镜术治疗鼻息肉的临床疗效。方法选取2008年2月至2011年2月在潜江市中心医院诊治的134例鼻息肉患者按数字法随机分为两组各67例,进行回顾性分析,对照组仅采取鼻内镜下息肉切除术治疗,观察组在对照组治疗基础上加用糖皮质激素治疗。比较两组患者治疗总有效率和手术时间、术中出血量、住院时间等情况变化。结果观察组治疗总有效率为91．0％,显著高于对照组的77．6％,两组的疗效比较差异有统计学意义（Z=2．334,P〈0．05）;观察组患者手术时间、术中出血量和住院时间较对照组均显著减少（P〈0．05）;观察组复发率（6．O％）显著低于对照组（22．4％）（x2=8．723,P〈0．05）。结论糖皮质激素联合鼻内镜术治疗鼻息肉的疗效显著、复发率低,值得临床推广应用。     

头孢曲松钠联合糖皮质激素治疗晚期血清梅毒固定的临床疗效研究

目的:观察头孢曲松钠联合糖皮质激素治疗晚期血清梅毒固定的临床疗效。方法:选取我院2012年4月至2015年5月间收治的70例晚期血清梅毒固定患者,按照随机数字表的方法随机分为观察组(35例)与对照组(35例),对照组采用地塞米松与复方倍他米松治疗,观察组患者在对照组基础上增加头孢曲松钠进行治疗,比较两组患者临床治疗总有效率、复发率、TRUST下降滴度数及滴度下降所需时间,外周血淋巴细胞亚群与血清白细胞介素2、10、12水平,以及不良反应发生情况之间的差异。结果:观察组患者临床治疗总有效率明显高于对照组(P0.05),TRUST下降滴度数明显多于对照组,而滴度下降所需时间明显少于对照组,CD4+细胞、B细胞、NK细胞明显高于对照组患者,IL-2、IL-10与IL-12均明显高于对照组患者,差异有统计学意义(P0.05)。结论:头孢曲松钠联合糖皮质激素治疗晚期血清梅毒固定患者临床疗效显著、复发率低,能明显提高血清滴度的下降程度、缩短下降时间,提高免疫功能水平,安全性较高,值得应用与推广。     

高压氧联合糖皮质激素治疗难治性突发性聋疗效观察

目的 观察高压氧(hyperbaric oxygen,HBO)联合糖皮质激素(glucocorticoid,GC)对难治性突发性聋临床疗效.方法 经患者知情同意,并经医院伦理委员会批准,根据患者是否使用GC治疗,将有完整临床资料的79例突发性聋患者分为HBO联合GC治疗组44例,单纯HBO组35例.另外,在我院同期耳鼻喉科收治的复诊就医的突发聋患者中,选取使用GC治疗但未进行HBO治疗患者32例,作为单纯GC组.通过分析治疗有效率、治愈率和听力改善率,对比联合治疗与单纯HBO治疗及单纯GC药物治疗的疗效差异.结果 HBO联合GC组患者的治疗有效率(59.52％)和听力改善率[(61.3±14.7)％]明显高于单纯HBO组[28.13％,(43.6±5.5)％]和单纯GC组[31.25％,(56.4±4.1)％].结论 对难治性突发性聋HBO联合GC较单纯HBO治疗或GC治疗效果更好.     

Differentially modulated dendritic cells induce regulatory T cells with different characteristics

Dexamethason (DEX) treated DC display several features that establish them as candidates for specific allogeneic tolerance induction. We report the results of in vitro studies of polarization of the alloimmune T cell response with two types of differentially modulated human DC. Both DEX treated DC triggered by LPS for 6 h (DEX6-DC) and DEX treated DC triggered by LPS for 48 h (DEX48-DC) acquired low levels of costimulatory, adhesion, and MHC class II molecules compared with mature DC (mDC). In contrast to mDC, both DEX6-DC and DEX48-DC did not produce any IL-12. DEX6-DC were able to produce significant amounts of IL-10 whereas DEX48-DC did not actively produce IL-10. Conversely, the induction of IL-10 producing cells was significantly increased when PBL were stimulated with DEX48-DC compared with DEX6-DC. Both stimulation of PBL with DEX6-DC and DEX48-DC led to the induction of cell populations able to suppress the proliferative alloimmune response of primed T cells in a cell-cell contact independent and antigen-nonspecific manner. Tregs obtained after stimulation with DEX48-DC were also able to inhibit the IFN-gamma production of the effector cells and this effect could be blocked by anti-IL-10. Tregs induced by DEX6-DC produced similar amounts of IL-10, yet were not able to inhibit IFN-gamma production of the effector T cells, indicating a different mechanism. In summary, we show that differential modulation of DC results in the induction of different populations of regulatory T cells.     

糖皮质激素受体基因多态性与骨密度关系的研究

目的 以体内糖皮质激素水平正常的人群为研究对象,研究糖皮质激素受体(GR)基因多态性与骨密度间的关系。方法 用特异的等位基因PCR方法检测人群的GR基因型,用DEXA检测腰椎、股骨各处骨密度。结果 在男性病例,各基因型间BMD的T值无明显统计学差异;在女性病例,各基因型间BMD的T值比例:TT型比CC型T值明显升高(P<0.05)。结论 GR基因外显子8的678位点突变(C→T),可使女性腰椎骨密度增加,具有骨密度保护作用。     

糖皮质激素诱导胰岛素抵抗的分子机制

糖皮质激素是体内重要的胰岛素拮抗激素,可诱导胰岛素抵抗。糖皮质激素可以干扰骨骼肌细胞的葡萄糖摄取和利用,抑制脂肪组织中葡萄糖转运蛋白（GLUT）-4的胞内分布及糖转运活性从而抑制糖摄取。并可通过调节脂肪细胞因子如脂联素、抵抗素、瘦素、内脏脂肪素的分泌,影响胰岛素的敏感性。此外,糖皮质激素还可抑制胰岛β细胞功能,使胰岛素分泌减少,并触发胰岛细胞凋亡。     

外周T细胞淋巴瘤合并自身免疫性溶血性贫血的临床特点分析

背景与目的:与自身免疫性溶血性贫血(autoimmune hemolytic anemia,AIHA)相关的淋巴瘤病理学类型多见于惰性B细胞淋巴瘤,而很少见于弥漫性大B细胞淋巴瘤(diffuse large B-cell lymphoma,DLBCL)及外周T细胞淋巴瘤(peripheral T-cell lympho...     

1,25(OH)2D3对应用糖皮质激素治疗的肾病患者骨代谢的影响

目的观察1,25(OH)2D3对应用糖皮质激素治疗的原发性肾脏病患者骨代谢的影响。方法将16例原发性肾脏病患者随机分为治疗组和对照组。治疗组在应用糖皮质激素治疗的同时给予0.25μg的1,25(OH)2D3,每日1次口服,碳酸钙0.75,每日3次口服。对照组单纯给予碳酸钙0.75,每日3次口服。所有患者在治疗前及治疗12周时应用双能X线吸收法骨密度仪测定腰椎和股骨颈的骨密度,同时测定有关骨代谢指标,包括血全段甲状旁腺素,骨钙素,尿脱氧吡啶啉,血钙、磷以及血清白蛋白,24小时尿蛋白定量、尿钙和尿磷。结果治疗12周时两组患者的腰椎和股骨颈骨密度均下降,两组间比较无显著性差异(P>0.05);治疗12周时对照组患者的骨钙素较治疗前明显下降(P<0.05),而治疗组无明显差异;尿脱氧吡啶啉在两组中均下降,但治疗组下降明显(P<0.05);两组患者血全段甲状旁腺素、24小时尿钙和尿磷治疗前后及组间比较均无显著性差异(P>0.05);应用1,25(OH)2D3治疗者无1例出现高钙血症。结论应用糖皮质激素治疗12周的原发性肾脏病患者其腰椎及股骨颈骨密度下降明显。1,25(OH)2D3可促进骨形成,抑制骨的吸收。     

Effect of hyperthermia and anoxia on glucocorticoid and mineralocorticoid receptor expression in neonatal rat hippocampus

Brief periods of neonatal asphyxia are frequently observed. Within the CNS, the hippocampus is known to be particularly vulnerable to the damaging effects of hypoxia/ischaemia. The hippocampus contains the highest concentration of both mineralocorticoid (MR) and glucocorticoid (GR) receptors and the balance between MR/GR activation influences cell birth and death. MR occupation appears to promote prosurvival actions, while GR overactivation favours neurodegeneration. It has been widely recognized that core body temperature is a critical determinant of the severity of hypoxic–ischemic brain injury; indeed, hyperthermia exacerbates the degree of damage. Therefore, the aim of the present investigation was to study the effect of elevated body temperature in newborn rats under control conditions or during neonatal exposure to a critical anoxia, on changes of MR and GR mRNA expression in the rat hippocampus. 2-day-old rats were exposed to anoxia in 100% nitrogen atmosphere. Rectal temperature was kept at 33 °C (typical for the rat neonates), or elevated to a level typical for febrile (39 °C) adults. Control rats were exposed to atmospheric air under the respective thermal conditions. The changes in MR and GR mRNA expression in hippocampus were examined 24 h after exposure. Our data show that hyperthermia with or without added anoxia, causes induction of MR mRNA expression in neonatal rat hippocampus without any effect on GR mRNA expression. We suggest this elevation of MR plays an important role in modulating the survival of neurons in the injured hippocampus.