李彦民主任医师治疗痹证应用乌头经验

痹证多见寒湿证型,临床治疗多用乌头。李彦民主任医师应用乌头强调辨证准确,多用复方监制其毒性,主张建立乌头用量和煎煮时间的比例,对乌头的煎煮用法和服用注意事项提出了独到的见解,临床应用也取得了满意的疗效。     

Exploring the mechanism of Buyang Huanwu decoction in the treatment of lumbar disc herniation based on network pharmacology and molecular docking

Buyang Huanwu decoction (BYHWD), as one of the traditional Chinese medicine formulas, is widely used in the clinical treatment of lumbar disc herniation (LDH) with curative effect. It has the characteristics of multi-component, multi-target, and mutual synergy, but the mechanism of action is often unclear. It needs some research to explore the molecular mechanism of BYHWD in the treatment of LDH based on network pharmacology and molecular docking. Screen the active compounds of BYHWD and predict drug-related gene/protein targets, which could determine the specific target of BYHWD in the treatment of LDH. Construct the “Drugs-Compounds-Targets” network and search for the core targets. Use Gene Ontology functional enrichment analysis, Kyoto Encyclopedia of Genes and Genomes pathway enrichment analysis, and molecular docking verification to explore the possible molecular mechanism. Eighty-two effective compounds and 666 targets of BYHWD, 187 targets for LDH treatment, and 20 core candidate targets were excavated. A total of 3414 entries were identified by Gene Ontology enrichment analysis, 173 related signal pathways were identified by Kyoto Encyclopedia of Genes and Genomes enrichment analysis, and 5 core compounds were identified by molecular docking, which had a good affinity with core genes STAT3, JUN, AKT1, MAPK1, RELA, and PIK3CA. BYHWD may play the role of analgesic and improving function by synergistic anti-inflammatory and analgesic compounds, regulating cell metabolic differentiation, regulating immunity, and anticoagulation. BYHWD in the treatment of LDH may play a role in analgesia and improve function through multiple signaling pathways, including PI3K-Akt, mitogen-activated protein kinase, tumor necrosis factor, and interleukin-17. The PI3K-Akt signaling may be one of the key mechanisms.     

利尿性肾图对小儿上尿路扩张的诊断意义

对３３例４４侧上尿路扩张的患儿进行利尿性肾图的检测，其时间活性曲线分成四种类型：Ⅰ型，无梗阻；Ⅱｂ、Ⅲ、Ⅳ型，有明显梗阻存在，其中２１侧接受手术，术中均发现有不同程度的上尿路梗阻性病变；Ⅱａ型，需定期随访，观察病情变化。利尿性肾图对鉴别小儿尿路梗阻是一较为简便、可靠的方法。     

单细胞基因组和转录组的共测定方法研究进展

单细胞测序提供了大量样品测序所不能提供的异质性等信息。然而由于细胞生长发育受多种因素调节,仅依靠基因型或者表型信息无法全面、准确地说明问题。因此,开发单细胞基因组转录组共测定技术为研究基因变异与表型变异间的关系提供了强有力的工具。目前,单细胞基因组与转录组共测定技术主要分为全细胞裂解法（如：G&T-Seq、DR-Seq）,细胞膜裂解法（如：SIDR、微流控芯片法）以及其他方法（如：Simul-Seq、Gel-Seq）。本文对这几类技术进行了简要介绍,并对其前景进行了展望。     

VVS患者心率变异性、CK、CK-MB变化及治疗前后变化的意义

目的：探讨血管迷走性晕厥(VVS)患者的心率变异性指标、血清肌酸激酶(CK)、肌酸激酶同工酶(CK-MB)的变化及其临床意义。方法：选取我院心血管内科收治的VVS患者67例作为VVS组、领选取70例同龄健康体检对象作为对照组;对比两组的心率、超声心动图参数、心率变异性指标及血清CK、CK-MB水平,并对比67例患者在接受射频导管消融术治疗前后的上述指标变化情况。结果：VVS组患者的最大心率与对照组差异无统计学意义;VVS组患者的最慢心率、平均心率均低于对照组;VVS组的心率总体标准差、差值标准差、差值均方根均高于对照组;VVS组患者的左心房前后径、左心室舒张末内径、左心室射血分数与对照组差异无统计学意义;VVS组患者的血清CK、CK-MB均低于对照组;经射频导管消融术治疗后,VVS组患者的平均心率较治疗前提高;VVS组的心率总体标准差、差值标准差、差值均方根均较治疗前降低;经射频导管消融术治疗后,VVS组血清CK、CK-MB均较治疗前提高。结论：VVS患者的心率变异性更加明显、血清CK、CK-MB水平降低,采用射频导管消融术治疗能显著改善患者的心率变异性。     

Combined prognostic value of preoperative serum thyrotrophin and thyroid hormone concentration in papillary thyroid cancer

BackgroundA growing number of studies have found a close association between thyroid hormones and thyrotrophin (TSH), and they also have prognostic significance in some cancer types; this study aimed to investigate the prognostic value of free triiodothyronine (fT3), free thyroxine (fT4), fT3/fT4, TSH, and their combination in patients with papillary thyroid carcinoma (PTC).MethodsThis study retrospectively analyzed the relevant data of 726 newly diagnosed PTC patients. Both univariate and multivariate analyses were used to predict the recurrence rate, and a risk score was established. In addition, with the use of a random survival forest, a random forest (RF) score was constructed. After calculating the area under the curve (AUC), the diagnostic efficacy of risk score, RF score, and four indicators was compared.ResultsfT3, fT4, fT3/fT4, and TSH were strongly associated with some invasive clinicopathological features and postoperative recurrence. Patients with high expression of fT4 and TSH have a high risk of recurrence. By contrast, patients with high expression of fT3 and fT3/fT4 have a low risk of recurrence. At the same time, the combined use of various indicators is more helpful for establishing an accurate diagnosis. By comparison, we found that the RF score was better than the risk score in terms of predicting the recurrence of PTC.ConclusionThe diagnostic accuracy of a combination of fT3, fT4, fT3/fT4, and TSH can help improve our clinical estimate of the risk of recurrent PTC, thus allowing the development of a more effective treatment plan for patients.     

Preparation and photodynamic antibacterial/anticancer effects of ultralong-lifetime room-temperature phosphorescent N-doped carbon dots

Room-temperature phosphorescent (RTP) N-doped carbon-dots (CNDs) featuring eco-friendliness, low cost and high biocompatibility, are ideal photodynamic antibacterial and anticancer nanomaterials. However, the existing CNDs are limited by low singlet oxygen (¹O₂) quantum yield, which has become a bottleneck in the development of CNDs. One basic reason is the short T₁-state exciton lifetime of CNDs. Herein, triethylenetetramine hexaacetic acid was used to synthesize CNDs via a one-step hydrothermal method. CNDs are characterized with low toxicity, high biocompatibility and ultralong-lifetime RTP (URTP). In addition to the URTP (average lifetime 414 ms) under solid conditions, CNDs even had URTP (average lifetime 320 ms) in a water environment. The ultralong T₁ exciton lifetime largely extends the collision time between T₁ state excitons and O₂ and prolongs the energy transfer time, not only improving the quantum yield (0.63) of singlet oxygen (¹O₂) in solution, but also facilitating the photodynamic antibacterial and anticancer effects.

The URTP CNDs largely extends the collision time between T₁ state exciton and O₂, which improve quantum yield of singlet oxygen (¹O₂) in solutions, facilitating the photodynamic antibacterial and anticancer effects.     

基体辅助激光解吸质谱法在生物大分子质量研究中的应用

研究了基体辅助激光解析飞行时间质谱法(MALDI-TOF MS)测定蛋白和糖蛋白的实验条件,实测了重组人白细胞介素2、肿瘤坏死因子、粒细胞巨噬细胞集落刺激因子、白细胞干扰素α2b、白细胞干扰素α₁、促红细胞生成素、钙调蛋白及其片段、大鼠脑型一氧化氮合成酶和天然牛精液蛋白提取物的分子量和纯度,鉴定了蛋白质混合物中各单个成分,结果表明MALDI-TOF MS可有效地研究基因工程蛋白质和天然蛋白提取物等生物大分子的质量。