VAC结合游离植皮治疗儿童大面积皮肤缺损疗效观察及对患儿生活质量的影响

目的:探讨负压创面治疗技术(Vacuum assisted closure,VAC)结合游离植皮治疗儿童大面积皮肤缺损疗效及对患儿生活质量的影响。方法:选取2015年2月-2019年2月笔者医院收治的60例大面积皮肤缺损患儿作为研究对象,按照随机数表法分为干预组和对照组,每组30例。对照组采用游离植皮术治疗,干预组在对照组的基础上结合VAC治疗,以皮片成活时间、皮片成活率、换药次数及住院天数评估疗效,以长海痛尺分级法评估患儿疼痛等级,以抑郁自评量表(Self-rating depression scale,SDS)、焦虑自评量表(Self-rating anxiety scale,SAS)评估患儿心理状态,以术后不良反应发生率评估患儿预后情况,以自制生活质量表评估患儿生活质量水平。结果:干预组患儿皮片成活时间、换药次数与住院天数均小于对照组,差异有统计学意义(P<0.05)。干预组患儿皮片成活率为93.33%高于对照组的76.67%,差异有统计学意义(P<0.05)。干预组治疗后疼痛感、SDS与SAS评分低于治疗前,且低于对照组,差异有统计学意义(P<0.05)。干预组患儿术后不良反应发生率为6.67%显著低于对照组23.33%,差异有统计学意义(P<0.05)。两组治疗前活动能力、心理健康及社交能力均低于治疗后,干预组治疗后活动能力、心理健康及社交能力均高于对照组(P<0.05)。结论:VAC结合游离植皮治疗儿童大面积皮肤缺损疗效显著,能有效降低患儿生理疼痛与心理焦虑,减少伤口感染等不良反应的发生,提高患儿生活质量,具有推广价值。     

无创呼吸机辅助通气对重症哮喘患者的临床效果观察

目的:探讨无创呼吸机辅助通气对重症哮喘患者的临床疗效。方法:选择2018年1月~2019年5月本院收治的86例重症哮喘患者作为研究对象,根据随机数字表法将86例患者分为观察组(n=43例)和对照组(n=43例),对照组患者采用β2受体激动药、糖皮质激素、茶碱类药物、鼻导管吸氧、纠正水电解质及酸碱失衡等对症处理,观察组在对照组对照对症处理基础上加以无创呼吸机辅助通气治疗,对比分析两组患者的咳嗽、胸闷、喘息缓解时间,测定治疗前后两组患者的肺功能指标[第1秒用力呼气量(FEV1)、第1秒呼气容积与用力肺活量比值(FEV1/PVC)]变化情况,同时比较两组患者的治疗疗效。结果:观察组的咳嗽缓解时间、胸闷缓解时间、喘息缓解时间均明显短于对照组,P<0.05。治疗前,观察组及对照组的FEV1、FEV1/PVC比较,P>0.05。治疗后,观察组的FEV1、FEV1/PVC均明显高于对照组,P<0.05。观察组总有效率为90.70%(39/43),对照组总有效率为67.44%(29/43),两组比较,P<0.05。结论:在重症哮喘患者中应用无创呼吸机辅助通气治疗,可有效改善患者的临床症状及肺功能,并能有效提高药物治疗效果,具有重要的临床意义。     

Control the fate of human umbilical cord mesenchymal stem cells with dual‐enzymatically cross‐linked gelatin hydrogels for potential applications in nerve regeneration

Stem‐cell‐based therapy is a promising strategy to treat challenging neurological diseases, while its application is hindered primarily by the low viability and uncontrolled differentiation of stem cell. Hydrogel can be properly engineered to share similar characteristics with the target tissue, thus promoting cell viability and directing cell differentiation. In this study, we proposed a new dual‐enzymatically cross‐linked and injectable gelatin hydrogel for regulating survival, proliferation, and differentiation of human umbilical cord mesenchymal stem cells (hUC‐MSCs) in a three‐dimensional matrix. This injectable gelatin hydrogel was formed by oxidative coupling of gelatin–hydroxyphenyl acid conjugates catalyzed by hydrogen horseradish peroxidase (HRP) and choline oxidase (ChOx). Modulus and H₂O₂ release can be well controlled by ChOx activity. Results from calcein‐AM/PI staining and Ki67 immunofluorescence tests demonstrated that the survival and proliferation behavior of hUC‐MSCs were highly enhanced in HRP_1UChOx_0.25U hydrogel with lower modulus and less H₂O₂ release compared with other groups. Attractively, the expression of neuron‐specific markers β‐III tubulin, neurofilament light chain (NFL), and synapsin‐1 was significantly increased in HRP_1UChOx_0.25U hydrogel as well. Additionally, in vitro hemolysis test and in vivo HE staining data highlighted the good biocompatibility. Undoubtedly, this injectable gelatin hydrogel's ability to control hUC‐MSCs' fate holds enormous potentials in nervous disorders' therapy and nerve regeneration.     

Interleukin-17A suppresses granular layer formation in a 3-D human epidermis model through regulation of terminal differentiation genes

Immunotherapies targeting interleukin (IL)-17 greatly improve plaque psoriasis. Most previous studies on IL-17 focused on the T-helper (Th)17 immune response, but investigation of the effects of IL-17A on psoriatic epidermal structure are limited. Using an in vitro 3-D human epidermis model, we investigated the effects of IL-17A and IL-17C on morphological changes and gene expression. IL-17A directly suppressed the formation of the granular layer, whereas IL-17C did not. IL-17A significantly downregulated the gene expression of profilaggrin (FLG), which is a major component of keratohyalin granules in the granular layer. Global gene expression analysis of this 3-D epidermis model showed that both IL-17A and IL-17C upregulated S100A7A and type 1 interferon-related genes including MX1, IFI44L, XAF1 and IFIT1. However, only IL-17A directly downregulated keratinocyte differentiation-related and cornified envelope-related genes including FLG, LOR, C1ORF68, LCE1E, LCE1B, KRT10, CST6 and RPTN. In conclusion, IL-17A, a systemic inflammatory cytokine, affected keratinization in our 3-D epidermis model. In contrast, IL-17C, a locally produced cytokine, did not have strong effects on keratinization. Targeting IL-17A does not only reduce inflammation but it may also directly affect epidermal differentiation in psoriasis.     

接受供精人工授精夫妇生育压力和生活质量研究

目的：调查接受供精人工授精（AID）夫妇的生育压力与生活质量，了解生育压力和生活质量的关系，为这些夫妇进行心理和生活质量干预时提供理论依据。方法：采用患者夫妇一般情况调查表、生育压力量表（FPI量表）和生活质量量表（FertiQoL量表）对北京大学第三医院2018年5—9月生殖中心门诊就诊的129对准备接受AID助孕的夫妇进行横断面调查，比较夫妇双方生育压力和生活质量的差异，分析生育压力和生活质量之间的关系。结果：接受AID的女性患者FPI总分为（159.00±17.52）分，FertiQoL总分为（62.27±9.26）分；男性配偶FPI总得分为（153.91±19.96）分，男性配偶FertiQoL总分为（65.12±11.62）分。女性FPI总分高于男性（t=2.436，P=0.016），女性无子女压力维度得分高于男性（t=3.145，P=0.002）。男性FertiQol总分高于女性（t=-2.881，P=0.005），女性情感反应维度得分高于男性（t=3.681，P=0.000），男性身心关系维度得分高于女性（t=-11.401，P=0.000）。Pearson 相关分析结果显示，接受AID助孕的女性FPI总分及性压力、夫妻关系、父母角色需求压力三个维度与其生活质量呈负相关（P＜0.05），接受AID男性配偶FPI总分和社会压力、性压力、夫妻关系维度、父母角色需求压力这4个维度与其生活质量呈负相关（P＜0.05）。多重线性回归显示，生育压力、居住地、文化程度是影响接受AID助孕女性患者生活质量的重要影响因素（F=3.485，R2=0.168，P＜0.05），生育压力、文化程度、家庭月收入是影响接受AID助孕男性配偶生活质量的重要影响因素（F=4.390，R2=0.203，P＜0.01）。结论：接受AID女性患者生育压力高于男性配偶，生活质量低于男性配偶；生育压力是影响AID夫妇生活质量的重要因素，夫妇双方生育压力越大，生活质量越低。     

Metabolism of deltamethrin and cis- and trans-permethrin by rat and human liver microsomes,liver cytosol and plasma preparations

1. The metabolism of deltamethrin (DLM), cis-permethrin (CPM) and trans-permethrin (TPM) was studied in liver microsomes, liver cytosol and plasma from male Sprague–Dawley rats aged 15, 21 and 90 days and from adult humans.

2. DLM and CPM were metabolised by rat hepatic microsomal cytochrome P450 (CYP) enzymes and to a lesser extent by microsomal and cytosolic carboxylesterase (CES) enzymes, whereas TPM was metabolised to a greater extent by CES enzymes.

3. In human liver, DLM and TPM were mainly metabolised by CES enzymes, whereas CPM was metabolised by CYP and CES enzymes.

4. The metabolism of pyrethroids by cytosolic CES enzymes contributes to the overall hepatic clearance of these compounds.

5. DLM, CPM and TPM were metabolised by rat, but not human, plasma CES enzymes.

6. This study demonstrates that the ability of male rats to metabolise DLM, CPM and TPM by hepatic CYP and CES enzymes and plasma CES enzymes increases with age. In all instances, apparent intrinsic clearance values were lower in 15 than in 90?day old rats. As pyrethroid-induced neurotoxicity is due to the parent compound, these results suggest that DLM, CPM and TPM may be more neurotoxic to juvenile than to adult rats.

     

Metabolism of deltamethrin and cis- and trans-permethrin by human expressed cytochrome P450 and carboxylesterase enzymes

1. The metabolism of the pyrethroids deltamethrin (DLM), cis-permethrin (CPM) and trans-permethrin (TPM) was studied in human expressed cytochrome P450 (CYP) and carboxylesterase (CES) enzymes.

2. DLM, CPM and TPM were metabolised by human CYP2B6 and CYP2C19, with the highest apparent intrinsic clearance (CL_int) values for pyrethroid metabolism being observed with CYP2C19. Other CYP enzymes contributing to the metabolism of one or more of the three pyrethroids were CYP1A2, CYP2C8, CYP2C9*1, CYP2D6*1, CYP3A4 and CYP3A5. None of the pyrethroids were metabolised by CYP2A6, CYP2E1, CYP3A7 or CYP4A11.

3. DLM, CPM and TPM were metabolised by both human CES1 and CES2 enzymes.

4. Apparent CL_int values for pyrethroid metabolism by CYP and CES enzymes were scaled to per gram of adult human liver using abundance values for microsomal CYP enzymes and for CES enzymes in liver microsomes and cytosol. TPM had the highest and CPM the lowest apparent CL_int values for total metabolism (CYP and CES enzymes) per gram of adult human liver.

5. Due to their higher abundance, all three pyrethroids were extensively metabolised by CES enzymes in adult human liver, with CYP enzymes only accounting for 2%, 10% and 1% of total metabolism for DLM, CPM and TPM, respectively.