头结海绵化学成分的研究

 头结海绵(Tylotellasp.)为我国青岛湾海域内新发现的一种海绵。对该海绵的化学成分进行了研究，分离出6种成分，根据理化性质和光谱数据，确定它们为:24-去甲-胆甾-5，22E-双烯-3β-醇、麦角甾-5，24(28)-双烯-3β-醇、胆甾醇、穿贝海绵甾醇、胸腺嘧啶脱氧核苷、酪胺。其中，胸腺嘧啶脱氧核苷具有多种药理活性，从海外中首次分得。     

益妇宁软胶囊对去势大鼠骨组织雌激素受体表达的影响

目的:研究不同剂量的益妇宁软胶囊(YFN)对去势大鼠骨组织中雌激素受体(ER)表达的影响,探讨该方对绝经后骨质疏松症(PMO)的治疗机制.方法:采用3月龄SD雌性大鼠60只,50只行双侧卵巢切除术,随机分为YFN大剂量组(相当于原生药0.8 g/kg)、YFN中剂量组(相当于原生药0.4 g/kg)、YFN小剂量组(相当于原生药0.2 g/kg)和阳性药对照组(己烯雌酚0.1 mg/kg)、模型对照组,每组10只;另10只为假手术组.术后4周开始给药,给药12周后收集标本.采用放免法测定血清雌二醇水平,Western blotting免疫印迹法检测胫骨组织中ER表达情况.结论:YFN能明显提高去势大鼠体内雌激素水平及骨组织雌激素受体的表达量,通过这两条途径起到治疗绝经后骨质疏松症的作用.     

CPC/PMMA复合骨水泥联合明胶海绵预防伴椎体前壁破裂骨质疏松性骨折术中骨水泥渗漏的疗效观察

:目的: 观察采用明胶海绵封堵裂口、经皮CPC/PMMA复合骨水泥椎体后凸成形在治疗伴有椎体前壁破裂的老年骨质疏松性椎体压缩骨折术中防止骨水泥渗漏的临床效果。方法: 回顾性分析自2023-06—2023-11诊治的15例伴有椎体前壁骨皮质破裂的老年骨质疏松性椎体压缩性骨折,以破裂区域为靶点进行穿刺,分多次将明胶海绵顶向椎体前壁破裂区域,再使用CPC/PMMA复合骨水泥注射进行经皮椎体后凸成形,观察骨水泥有无经椎体前壁渗漏的情况。结果: 15例患者均顺利完成手术,骨水泥均未超出椎体范围进入其他组织。结论: 采用明胶海绵封堵裂口、经皮CPC/PMMA复合骨水泥椎体后凸成形可显著降低术中骨水泥渗漏的概率。     

非明胶软胶囊研究进展

本文综述了可以替代明胶的亲水性高分子胶体材料,包括变性淀粉、结冷胶、卡拉胶、黄原胶、甘露聚糖胶.介绍了其在非明胶软胶囊中的应用以及国内外在这一领域的研究进展.     

CircRNAs in hepatocellular carcinoma: characteristic,functions and clinical significance

Hepatocellular carcinoma (HCC) is one of the most common and serious types of cancer worldwide, with high incidence and mortality rates. Circular RNAs (circRNAs) are a novel class of non-coding RNA with important biological functions. In recent years, multiple circRNAs have been found to be involved in the biological processes of tumorigenesis and tumor development. Increasing evidence has shown that circRNAs also play a crucial role in the occurrence and development of HCC. However, the specific molecular mechanism of circRNAs in HCC has not been fully elucidated. The present review systematically summarized the classification and basic characteristics of circRNAs, their biological functions and their role in the occurrence and development of HCC. By summarizing the previous studies on circRNAs in HCC, this study aimed to indicate potential approaches to improving the early diagnosis and treatment of HCC.     

The role of hemostatic devices in neurosurgery. A systematic review

Hemostasis represents a fundamental step in every surgical procedure. During neurosurgical procedures, proper and robust hemostasis into confined spaces can significantly reduce the odds of perioperative complications. Over the decades, multiple methods have been applied, and several medical devices have been developed to promote and guarantee proper hemostasis. This study presents a systematic review of the most used intraoperative hemostatic methods and devices in neurosurgery. Insightful research was performed on the PubMed database according to the PRISMA guidelines. This comprehensive review of scientific literature represents a synoptic panel where the most used intraoperative hemostatic methods and devices available today in neurosurgery are classified and described.     

Development of a novel bioabsorbable implant that is substituted by adipose tissue in vivo

Recently, adipose tissue has been regenerated by combining scaffolds, growth factors, and/or adipose‐tissue‐derived stromal cells. However, the safety of growth factors and adipose‐tissue‐derived stromal cells has not been confirmed in cancer patients. We reported the regeneration of adipose tissue in the internal space of a polypropylene mesh containing a collagen sponge (CS), without using any growth factors or cells. We herein explored the formation of adipose tissue, using the bioabsorbable implant containing CS, in rats. We prepared the implants without and with CS, using threads of either poly‐l ‐lactide‐co‐ε‐caprolactone or poly‐l ‐lactic acid (PLLA), and measured their strengths. The procedure was performed in the rat inguinal region. In the control group, no operative procedure was performed. In the sham‐operation group, skin incision without implantation was performed. The other groups received CS alone and the 2 implants with and without CS. The areas of formed tissue and adipose tissue inside the implants and the remnants of CS were evaluated. All implants maintained the internal space before implantation. At 6 and 12 months after implantation, the internal space was maintained and the formation of adipose tissue was promoted in the 2 PLLA groups. At 6 months, the internal space was maintained, and more adipose tissue was formed in the PLLA‐with‐CS group than in the PLLA group. Porcine collagen was absorbed within 3 months. The PLLA implant with CS is a novel bioabsorbable implant that is replaced with autologous adipose tissue after implantation.     

A new brominated polyacetylene from Chinese marine sponge Xestospongia testudinaria

A new brominated polyacetylene xestonariene J (1), bearing a rare 2,4-dibromo-1-ene-3-yne terminal in the molecule, along with two known related analogues (2 and 3), was obtained from Chinese marine sponge Xestospongia testudinaria. Its structure was determined on the basis of detailed spectroscopic analysis and comparison with literature data.