猪血管内皮细胞体外生长特性的研究

试验以体外分离培养的猪血管内皮细胞为材料 ,研究了细胞的生长曲线、不同基础培养基对细胞生长的影响及胰岛素在生长液中的适宜含量。结果表明 ,传代猪血管内皮细胞接种后有1d左右的滞留期 ,然后细胞进入对数生长期 ,可持续 2d ,第 5d进入平台期 ,第 8d细胞开始脱落死亡 ;与MEM相比 ,M 199更适合于用作培养猪血管内皮细胞的基础培养基 ;在不用贴附基质和内皮细胞生长因子 (ECGF)的条件下 ,生长液中加入胰岛素 ,可明显促进细胞的生长和增殖 ,胰岛素的最适用量为 8μg/mL。     

血管内皮细胞生长因子的研究及应用

血管内皮细胞生长因子(VEGF)是一种特异作用于血管内皮细胞的多功能细胞因子,它促使血管内皮细胞分裂增殖、增生、转移,增加血管通透性并促进新血管生成,参与体内的多种生理、病理过程,在临床医学上已获得较多应用,在法医病理学方面将有广泛的应用前景。     

Contribution of Antemortem Computed Tomography Findings to Cause of Death Determination: An Unusual Fatal Stroke

In the case reported here, the antemortem computed tomography scan (CT scan) was essential in the forensic investigation. A 32‐year‐old man was found fully awake with a facial abrasion, after what seemed to be a car accident. He lost consciousness suddenly one hour after initial management. Successive CT scan showed a facial fracture and a metallic foreign body in the carotid canal associated with an occlusion/dissection of the left internal carotid, a pseudoaneurysm, and a carotid‐cavernous fistula. The victim died from a stroke. Autopsy confirmed that the facial abrasion was a gunshot entrance wound, the metallic foreign body being a projectile. Intracranial vascular injuries linked with gunshot wounds are most of the time isolated and due to pelet embolism. The observed vascular injury association has never been described in the existing literature. The CT scan provided a better understanding of the chronology of events that led to death.     

丰富环境对脑梗死大鼠梗死灶周围血管内皮生长因子受体的影响

目的:研究丰富环境对大鼠局灶性脑梗死后梗死灶周围血管内皮生长因子受体的影响.方法:采用开颅电凝法制作SD大鼠右侧大脑中动脉缺血(MCAO)模型,术后第24小时随机分为丰富环境(EE)组和标准环境(SE)组.以免疫组织化学法检测血管内皮生长因子受体Flt-1及Flk-1的表达.结果:大鼠大脑中动脉闭塞后,缺血区神经元变性、坏死,Flt-1和Flk-1在缺血周边区表达明显增加,经丰富环境干预后,血管内皮生长因子受体表达大量增加.结论:丰富环境可促使血管内皮生长因子受体表达上调,进而促进微血管新生,有利于脑损伤修复.     

Fatal Child Abuse Presenting with Multiple Vertebral and Vascular Trauma

This case study involves the unexplained death of a previously healthy 30‐month‐old child. Reportedly, she was found unresponsive by her foster father following a 2‐hour nap. She was transported to the hospital and died in the emergency room of unknown causes. Blood drawn in the ER showed hemoglobin of 4.3 mg/dL. Postmortem skeletal survey, magnetic resonance imaging (MRI) of the brain, and retinal examinations were negative. The medical examiner assumed jurisdiction of the body. The autopsy showed massive retroperitoneal hemorrhage, transections of the abdominal aorta, and inferior vena cava, and complete tears of the anterior longitudinal ligament of the spine at C5/C6 and L1/L2 with diastases of the vertebral bodies at the corresponding intervertebral disk spaces. The case is believed to be extraordinary due to both the extent of injury that does not match the reported history and the mechanism of vertebral and vascular injuries.     

GFAP和VEGF在创伤性脑损伤中表达的研究进展

创伤性脑损伤是世界上导致死亡及残疾的主要原因之一。检测对中枢神经系统损伤有高度特异性和敏感性的生物标志物,可以在一定程度上反映损伤情况。胶质纤维酸性蛋白与血管内皮生长因子均可作为颅脑损伤的生物学标记物,其表达变化规律、峰值出现时间,与创伤性脑损伤的严重程度及损伤时间的推断密切相关,对于法医病理学具有重大意义。该文对胶质纤维酸性蛋白与血管内皮生长因子的分子生物学特性及其在创伤性脑损伤中的表达进行综述。     

Fatal Acute Hemorrhagic Bowel Infarction Caused by Mesenteric Venous Thrombosis

Acute mesenteric venous thrombosis (MVT) is a rare, but life‐threatening medical phenomenon. MVT is normally characterized by insidious onset, with nonspecific signs and symptoms. A high index of clinical suspicion is required for diagnosis, and emergency surgery is necessary to optimize the chances of patient survival, especially in the people aged more than 70 years. Surprisingly, based on my review of the literature, no fatal acute MVT case has been reported in the forensic literature. All reported such cases have been documented in medical literature, and most of them have been associated with underlying risk factors for venous thrombosis, such as hypercoagulable state, certain cancers, and stasis of the blood flow. Here, I report the case of a sudden unexpected death due to extensive intestinal ischemia and infarction with massive abdominal hemorrhage caused by acute MVT in a 72‐year‐old man without known underlying risk factors.     

丹参川芎有效成分配伍对缺氧损伤大鼠脑内皮细胞的影响

目的 研究丹参川芎有效成分不同配伍对缺氧损伤大鼠脑微血管内皮细胞（rat brain microvascular endothelial cells, rBMECs）的影响,并找出较优组合。方法 采用体外培养的rBMECs,并进行兔抗鼠Ⅷ因子鉴定,建立体外细胞缺氧模型。对参芎有效成分丹参素（A）、丹参酮Ⅱa（B）、川芎嗪（C）、藁本内酯（D）、阿魏酸（E）,以3个剂量水平进行正交实验,另设正常组、模型组,观察不同配伍对细胞中超氧化物歧化酶（superoxide dismutase, SOD）活性、细胞上清液乳酸脱氢酶（lactate dehydrogenase, LDH）、细胞凋亡率及细胞周期的影响。采用正交方差分析、直观综合分析对实验结果进行多指标优化。 结果 与模型组比较,各配伍样品均可提高SOD活性,降低LDH含量,减少细胞早期凋亡,抑制缺氧诱导的rBMECs发生G1/S期阻滞的作用。正交方差分析表明：A2B1C3D2E1为SOD的较优组合,A3B1C1D2E3为LDH的较优组合,A2B1C2D3E2为早期凋亡的较优组合,A2B3C3D3E2为G1期的较优组合,A2B3C3D2E2为S期的较优组合;综合分析结果显示A2B1C1D3E2为多指标的较优组合。结论 丹参川芎有效成分不同配伍可在一定程度上保护缺氧对rBMEC的损伤,不同配伍作用方式的侧重不同。     

黄蒲通窍胶囊对血管性痴呆患者血管炎性反应的干预作用

目的 观察黄蒲通窍胶囊对血管性痴呆患者的中医证候疗效,及其对血脂、血清C-反应蛋白（C-reactive protein, CRP）的干预作用。方法 将69例患者随机分成对照组（n=35）和研究组（n=34）,对照组采用多奈哌齐治疗,研究组给予黄蒲通窍胶囊和多奈哌齐联合治疗,观察两组治疗前后的中医证候疗效和血总胆固醇（total cholesterol, TC）、三酰甘油（triglyeride, TG）、血清CRP变化。结果 对照组和治疗组分别有5、4例失访。治疗后对照组中医证候积分、TC、TG、CRP无显著改善（P>0.05）,阿尔茨海默病评估量表认知亚量表（Alzheimers disease assessment scale-cognitive subscale, ADAS-cog）评分显著降低（P＜0.05）;研究组治疗后中医证候评分,ADAS-cog评分及血TC、TG、CRP水平均较治疗前显著降低（P＜0.05）,且显著低于对照组治疗后水平（P＜0.05,或P<0.01）。结论 黄蒲通窍胶囊可以改善血管性痴呆患者的中医证候,其作用机制可能与降低血脂、干预血管炎性反应有关。     

叶下珠水提物对裸鼠人肝癌移植瘤HBx和VEGFR3表达的影响

目的 探讨乙型肝炎病毒x基因（hepatitis B virux x gene, HBx）和血管内皮生长因子受体3（vascular endothelial growth factor receptor 3, VEGFR3）基因与乙型肝炎相关肝癌的相关性,以及叶下株水提物（aqueous extract of phyllanthus urinaria L, AEP）对HBx和VEGFR3蛋白表达的干预作用。方法 将60只Balb/c-nu裸鼠随机分为10组。分别复制转染HBx、氯霉素乙酞转移酶（chloramphenicol acetyltransferase,CAT）和VEGFR3基因的HepG2肝癌细胞的裸鼠皮下移植瘤模型,用AEP进行干预,以生理盐水、环磷酰胺（cyclophosphamide,CTX）作为对照,共治疗6周。观察模型复制后不同时间各组裸鼠的移植瘤生长状况,采用酶联免疫吸附试验检测各组裸鼠血清甲胎蛋白（alpha fetal protein, AFP）水平,采用Western blot方法检测移植瘤组织中HBx和VEGFR3蛋白表达水平。结果 肝癌移植瘤模型复制成功。各组裸鼠体质量均随着时间显著增长。实验结束时,接种HepG2-HBx细胞的各组中,AEP处理组肿瘤质量显著低于CTX处理组（P＜0.05）,其AFP水平显著高于NS处理组（P<0.05）,其移植瘤组织中HBx表达水平显著低于NS组（P<0.05）。接种相同肝癌细胞的各组中,AEP处理组VEGFR3表达水平最低,但与CTX组VEGFR3表达水平比较,差异无统计学意义（P＞0.05）;AEP组和CTX组VEGFR3表达水平显著低于NS组（P＜0.05）。对于相同的处理因素,接种HepG-HBx细胞和HepG-CAT细胞的裸鼠移植瘤组织中VEGFR3表达水平均显著低于接种HepG-VEGFR3细胞的裸鼠（P＜0.01）。结论 AEP通过直接抑制HBx蛋白和VEGFR3蛋白表达,及通过抑制HBx蛋白表达而间接抑制VEGFR3蛋白表达,达到对肝癌移植瘤生长的抑制作用。