Evaluation of chemical composition and antiedematogenic activity of the essential oil of Hyptis martiusii Benth

Evaluations of the therapeutic potential of medicinal plants and their components have been the subject of many studies. Furthermore, the biological activities of various plant species have been reported in various pieces of literature. Hyptis martiusii Benth (Lamiaceae), popularly known as “mad balm” is commonly found in the North, Southeast, and Northeast of Brazil. Its leaves are used ethnobiologically as antiulcerogenic, antimicrobial, antitumor and as insecticide. This study aimed to analyze the chemical composition of the essential oil of H. martiusii Benth (OEHM) by GC/MS as well as its possible topical activity as an antiedematogenic. This is verified by the models of ear edema induced by single (acute edema) and multiple (chronic edema) applications of croton oil topically, and systemically verified through the model of paw edema induced by carrageenan 1%. Doses of 50, 75 and 100 mg/kg OEHM were used in all tests. Chemical analysis of the oil revealed the 1,8-cineole (34.58%) and δ-carene (21:58%) as major components present in the essential oil. On the model of ear edema, acute and chronic OEHM in all the tested doses showed no significant antiedematogenic activity (p < 0.05). The systemic model of paw edema induced by carrageenin showed that a dose of 100 mg/kg effectively reduced swelling by 55.37% in the second hour evaluation when compared to the saline group. The anti-inflammatory systemic effect can give greater bioavailability of the components present in the essential oil and your interference in cytokines and leukotriene, thromboxane and prostaglandin biosynthesis. It is therefore concluded that OEHM presents systemic antiedematogenic activity but not topical activity at these doses.     

Chemical composition,antibacterial and antifungal activities of flowerhead and root essential oils of Santolina chamaecyparissus L., growing wild in Tunisia

The antimicrobial properties of essential oil from various Santolina species have not been investigated enough in the previous studies dealing with the biological activities of medicinal plants. In Tunisia, Santolina chamaecyparissus L. (Asteraceae) is the only Santolina species recorded and is used as vermifuge and emmenagogue. The chemical composition, antibacterial and antifungal properties of essential oils from the flowerheads and roots of spontaneous S. chamaecyparissus growing in Tunisia and the chemical composition which leads to the Tunisian chemotype are investigated here for the first time. Essential oils isolated by hydro distillation from flowerheads and roots of S. chamaecyparissus were analyzed by GC and GC/MS. Two methods served for antimicrobial assays of the essential oils: diffusion in a solid medium and micro-well dilution assay. Antifungal tests were carried out by the agar incorporation method. Sixty-seven constituents were identified from the essential oil of the flowerhead. The major constituents were: 1,8-cineole and β-eudesmol. Two non identified compounds were present at the highest concentration in root oil. Flowerhead oil was characterized by high contents in monoterpenes and sesquiterpenes oxygenated compounds. The flowerhead essential oil demonstrated potent of antibacterial properties against Pseudomonas aeruginosa ATCC and Enterococcus faecalis ATCC, with MIC of 0.625 μg/ml. These findings demonstrate that the flowerhead essential oils of S. chamaecyparissus have excellent antibacterial properties and for this reason they could contribute to decrease the problem of microbial resistance to antibiotics.     

Anti-oxidative effects of silkworm storage protein 1 in HeLa cell

Silkworm hemolymph contains unique proteins that exhibit anti-apoptotic activity in mammalian cells. Among them, 30 K protein, which is one of the major anti-apoptotic molecules in silkworm hemolymph, has been well investigated. However, little is known about the biological functions of storage protein 1 (SP1), another main protein in silkworm hemolymph. In this study, the anti-apoptotic and anti-oxidative activities of SP1 were analyzed. A stable cell line expressing SP1 was constructed, which showed strong anti-apoptotic effect induced by staurosporine treatment. In addition, the cell line exhibited resistance to oxidative stress caused by hydrogen peroxide. For practical applications of SP1, recombinant SP1 was produced in Escherichia coli, and the supplementation of recombinant SP1 into culture medium exhibited anti-apoptotic and anti-oxidative activities. In addition, SP1 was found to be a cell-penetrating protein and localized in the cytosol as well as on the plasma membrane. The findings showed that SP1 itself is not an anti-oxidant; rather, it mediates intracellular anti-oxidative activity. In conclusion, the cellular resistance of SP1 to apoptosis and oxidative stress will provide a new strategy that could be utilized in the bio-industry for the production of biologics as well as for the development of anti-aging cosmetics.     

人桥本甲状腺炎甲状腺组织中miRNAs表达谱的差异性分析

目的：桥本甲状腺炎是一种自身免疫性甲状腺疾病，且其发病率呈逐年上升趋势，在医疗实践中，HT 被认为是原发性甲状腺 功能减退最常见的原因，同时较易发生甲状腺癌和淋巴瘤。另外，HT 缺乏早期诊断标准，临床上发病隐匿且表现多样，病人多不 易察觉而延误治疗。本文旨在应用microRNA 芯片技术系统筛查HT病变甲状腺组织，以此研究并揭示其HT 的miRNA 表达谱 变化。方法：本研究首先采用microRNA芯片技术，对正常甲状腺组织及桥本甲状腺炎甲状腺组织中microRNA 的表达进行比较， 筛选桥本甲状腺炎中差异性表达的miRNAs。结果：与正常甲状腺相比，在桥本甲状腺炎及其合并甲状腺乳头状癌的一侧桥本甲 状腺炎中分别有39 个和25 个miRNAs 分子发生了差异性表达（P<0.05），比较2 组中共有的miRNAs 发现，miR-142-3p、 miR-338-3p、miR-454、miR-146a、miR-29b-1*、miR-150、miR-223 表达上调，miR-654-5p、miR-601、miR-198、miR-1226* 表达下调 （log2 FC≥ 2，P＜0.05）；而miR-142-5p 在原发性桥本甲状腺炎中表达显著性升高近8 倍（log2 FC=7.959，P＜0.01）。结论：我们通 过microRNA芯片，首次直接系统筛查了桥本甲状腺炎病变组织相关miRNA 表达谱，总体上初步掌握了与正常甲状腺相比，桥 本甲状腺炎及合并甲状腺乳头状癌时其miRNA 表达谱的变化情况，为我们后续的研究提供了方向与基础。     

~(131)I-Herceptin对HER2过表达乳腺癌细胞Bcl-xL表达的影响

目的:探讨131I-Herceptin对HER2过表达乳腺癌细胞Bcl-x L表达的影响。方法:采用Iodogen法制备131I-Herceptin,超滤法纯化后测定其标记率、放射化学纯度和免疫结合率。通过免疫荧光法检测乳腺癌细胞表面HER2表达水平。131I(4.625 MBq/m L)、Herceptin(125μg/m L)及131I-Herceptin(4.625 MBq/m L)干预乳腺癌BT474细胞后,Western blot检测细胞中Bcl-x L的表达。结果:131I-Herceptin的标记率、放射化学纯度和免疫结合率分别为(89.71±2.93)%、(91.80±1.43)%和(58.84±3.35)%。BT474细胞膜表面HER2表达水平明显高于MDA-MB-231细胞。Herceptin、131I-Herceptin组BT474细胞内Bcl-x L表达水平明显低于对照组及131I组(均P0.01),而Herceptin与131I-Herceptin组之间细胞内Bcl-x L含量差异无统计学意义(P0.05)。结论:131I-Herceptin保留Herceptin对HER2过表达乳腺癌细胞Bcl-x L表达的抑制作用并促进细胞凋亡,进而与131I产生协同作用,较Herceptin更有效地杀伤HER2过表达乳腺癌细胞。     

Novel degraded polycyclic polyprenylated acylphloroglucinol and new polyprenylated benzophenone from Hypericum sampsonii

Norhypersampsone A (1), a novel degraded polycyclic polyprenylated acylphloroglucinol (PPAP) derivative, 3-(2-hydroxy-7-methyl-3-methyleneoct-6-enyl)-5-isoprenyl-2,4,6-trihydroxybenzophenone (2), a new polyprenylated benzophenone derivative, and nine known compounds (3–11) were isolated from Hypericum sampsonii. Their structures were elucidated by comprehensive spectroscopic techniques. Compound 1 represents a novel cyclohexenone monocyclic-PPAP formed by losing the fragment of C-2–C-4 and the side chains at C-3 and C-5 in the phloroglucinol ring. The results of the inhibitory effects of compounds 1–11 on the nitric oxide (NO) production induced by lipopolysaccharide (LPS) in RAW 264.7 macrophages showed that compounds 1, 6–8, and 10 exhibited weak activities with IC₅₀ values in the range of 20.3–37.1 μM.