裸花紫珠治疗烧烫伤模型大鼠活性部位的筛选及其作用机制研究

为筛选裸花紫珠治疗烧烫伤的活性部位,并初步研究其作用机制。实验采用90°C热水造成大鼠烫伤模型。以伤口面积大小,伤口性状,如颜色、软硬程度等为指标,通过宏观和微观检测筛选裸花紫珠治疗烧烫伤的活性部位。采用ELISA和Western blot等方法初步研究其作用机制。进入组织增生重塑期后,石油醚组相较其它各组,伤口愈合最为显著;在组织增生最后的成熟期,石油醚组的表皮和真皮恢复得最好,伤疤最小。石油醚组的VEGF浓度在早期出现了明显的上调;在第21天时,TGF-β1的表达水平最低。裸花紫珠治疗烧烫伤的活性部位初步推测在石油醚层,其治疗烧烫伤作用机制可能是早期裸花紫珠使VEGF上调,在后期下调了TGF-β1以达到。本研究为裸花紫珠治疗烧烫伤的进一步研究和应用提供依据。     

裸花紫珠的化学成分

从裸花紫珠(Callicarpa nudiflora Hook.ex Arn.)地上部分的乙醇提取物中分离得到了7个化合物,经波谱分析确定其结构分别为:木犀草苷(1),木犀草素-3'-O-β-D-吡喃葡萄糖苷(2),木犀草素-4'-O-β-D-吡喃葡萄糖苷(3),2α,3α,19α-三羟基-乌索-12-烯-28-酸(4),乌索酸(5),2α-羟基-乌索酸(6)和齐墩果酸(7)。其中化合物2-7为首次从该植物中分离得到。     

云南植物三新种

<正> 马鞭草科 VERBENACEAE 紫珠属 CalliCarpa 细花紫珠 (江城紫珠) 新种 图1 Callicarpa minutiflora Y. Y. Qian, sp. nov. C. jiangchengensis Y. Y. Qian, ined. Species affinis C. acutifoliae H. T. Chang, sed foliis ellipticis, utrinque stellatopilosis, nervis lateralibus utrinseeus 7—9, cymis 4—6 cm latis, 5—7-     

Callicarpanes A–L,Twelve New Clerodane Diterpenoids with NLRP3 Inflammasome Inhibitory Activity from Callicarpa integerrima

Twelve new clerodane diterpenoids named callicarpanes A–L ( 1 – 12 ), together with eight known compounds ( 13 – 20 ), were isolated from Callicarpa integerrima. Their structures were determined by comprehensive spectroscopic data. The calculated chemical shifts were used to identify relative configurations using DP4+ analysis. The absolute configurations (AC) were assigned based on quantum chemical calculations and X-ray single-crystal diffraction methods. Compounds 1 , 3 , 5 , 9 , 10 , 12 , 15 , 16 , and 19 showed significant inhibitory activity for NLRP3 inflammasome activation, with the IC₅₀ against lactate dehydrogenase (LDH) release ranging from 0.08 to 4.78 μM. Further study revealed that compound 10 repressed IL-1β secretion and caspase-1 maturation in J774A.1 cell as well as blocked macrophage pyroptosis.