Light Emitting Diodes Irradiation Regulates miRNA-877-3p to Promote Cardiomyocyte Proliferation

Mammalian cardiomyocytes (CMs) maintain a low capacity for self-renewal in adulthood, therefore the induction of CMs cycle re-entry is an important approach to promote myocardial repair after injury. Recently, photobiomodulation (PBM) has been used to manipulate physiological activities of various tissues and organs by non-invasive means. Here, we demonstrate that conditioned PBM using light-emitting diodes with a wavelength of 630 nm (LED-Red) was capable of promoting the proliferation of neonatal CMs. Further studies showed that low-power LED-Red affected the expression of miR-877-3p and promoted the proliferation of CMs. In contrast, silencing of miR-877-3p partially abolished the pro-proliferative actions of LED-Red irradiation on CMs. Mechanistically, GADD45g was identified as a downstream target gene of miR-877-3p. Conditioned LED-Red irradiation also inhibited the expression of GADD45g in neonatal CMs. Moreover, GADD45g siRNA reversed the positive effect of LED-Red on the proliferation of neonatal CMs. Taken together, conditioned LED-Red irradiation increased miR-877-3p expression and promoted the proliferation of neonatal CMs by targeting GADD45g. This finding provides a new insight into the role of LED-Red irradiation in neonatal CMs biology and suggests its potential application in myocardial injury repair.     

On the horizon:Hedgehog signaling to heal broken bones

Uncovering the molecular pathways that drive skeletal repair has been an ongoing challenge. Initial efforts have relied on in vitro assays to identify the key signaling pathways that drive cartilage and bone differentiation. While these assays can provide some clues, assessing specific pathways in animal models is critical. Furthermore, definitive proof that a pathway is required for skeletal repair is best provided using genetic tests. Stimulating the Hh(Hedgehog) pathway can promote cartilage ...     

Construction of developmentally inspired periosteum-like tissue for bone regeneration

The periosteum, a highly vascularized thin tissue, has excellent osteogenic and bone regenerative abilities. The generation of periosteum-mimicking tissue has become a novel strategy for bone defect repair and regeneration, especially in critical-sized bone defects caused by trauma and bone tumor resection. Here, we utilized a bone morphogenetic protein-2(BMP-2)-loaded scaffold to create periosteum-like tissue(PT) in vivo, mimicking the mesenchymal condensation during native long bone developmen...     

Hippo pathway monomerizes STAT3 to regulate prostate cancer growth

Prostate cancer ranks among the most commonly diagnosed malignancies for men and has become a non‐negligible threat for public health. Interplay between inflammatory factors and cancer cells renders inflammatory tissue environment as a predisposing condition for cancer development. The Hippo pathway is a conserved signaling pathway across multiple species during evolution that regulates tissue homeostasis and organ development. Nevertheless, whether Hippo pathway regulates cancer‐related inflammatory factors remains elusive. Here, we show that high cell density–mediated activation of the Hippo pathway blunts STAT3 activity in prostate cancer cells. Hippo pathway component MST2 kinase phosphorylates STAT3 at T622, which is located in the SH2 domain of STAT3. This phosphorylation blocks the SH2 domain in one STAT3 molecule to bind with the phosphorylated Y705 site in another STAT3 molecule, which further counteracts IL6‐induced STAT3 dimerization and activation. Expression of a nonphosphorylatable STAT3 T622A mutant enhances STAT3 activity and IL6 expression at high cell density and promotes tumor growth in a mice xenograft model. Our findings demonstrate that STAT3 is a novel phosphorylation substrate for MST2 and thereby highlight a regulatory cascade underlying the crosstalk between inflammation and the Hippo pathway in prostate cancer cells.     

胸腰椎不稳定骨折前后路短节段内固定有限元生物力学研究

目的通过建立前、后路内固定模型,比较前、后路固定后的力学稳定关系,指导临床选择前路或后路固定。方法分别建立胸腰椎三维有限元力学模型和前、后路固定器械模型及L1骨折模型,分别加载,对不同固定组的L1前柱、中柱、前中柱骨折的应力进行比较。结果①椎体前柱损伤的工况下,前路固定组的L1平面的Mises stress小于后路固定;②椎体前中柱共同损伤的工况下,前路固定组也优于后路固定组。结论胸腰椎前柱与前中柱不稳定骨折损伤,前路固定都优于后路。     

Common Acupoints in the Lower Limb： Part I

Location: On the line connecting the anterior superior iliac spine and lateral border of the patella, at the level of gluteal sulcus.     

静止中立位状态及加载模拟头部重量后对髓核内压力影响的研究

目的:通过测试颈椎标本在静止中立位及模拟头部重量后的髓核内压力,从而探讨颈椎髓核内压力的变化规律。方法:利用生物力学材料实验机及微型压力传感器测试新鲜人体颈椎标本在静止中立位及加载100N压力时的髓核内压力。结果:静止中立位及加载100N压力时,C3～4和C4～5节段髓核内压力比较无显著性差异(P0.05),C5～6和C6～7节段髓核内压力比较无显著性差异(P0.05);C5～6,C6～7高于C3～4,C4～5髓核内压力(P0.05);加载100N后所有节段髓核内压力均升高具有显著性差异(P0.05)。结论:正常人体下颈段髓核内压力高于上颈段髓核内压力,并且随外在负荷的增加而压力增加。     

针刺调节脑梗死大鼠脑血管平滑肌CaP、CaD变化的实验研究

目的:通过研究脑梗死发生后脑动脉血管平滑肌中与血管收缩相关的PKC通路中关键蛋白CaP、CaD的表达变化及针刺干预效应,研究针刺对脑梗死大鼠脑血管平滑肌CaP、CaD变化的动态调节规律。方法:以线栓法复制脑梗死大鼠模型,以脑表面血管为研究对象,应用免疫印迹法检测脑血管平滑肌CaP、CaD的变化规律和电针干预效应。结果:免疫印迹结果显示:与空白组相比模型组MCAO后各时相CaD、CaP表达量下调均有显著统计学差异(P<0.01或P<0.05);模型组和针刺组组间比较显示,针刺组CaD、CaP表达量均上调,组间比较均有显著统计学差异(P<0.01,P<0.05)。结论:针刺干预可显著抑制MCAO模型大鼠脑表面血管CaD、CaP表达下调趋势,使其维持在正常值左右,这对于缓解缺血后血管平滑肌痉挛,保证缺血区血液供应具有重要作用。     

三黄口服液治疗代谢综合征的疗效观察

目的:探讨三黄口服液对代谢综合征肥胖人群的临床疗效。方法:以20名健康志愿者为参照,将100名代谢综合征患者随机分为治疗组(60名)和安慰剂组(40名),分别予三黄口服液和安慰剂治疗12周,观察治疗前后患者心血管危险因素的变化。结果:与安慰剂组相比,治疗组(起效剂量为10 ml/人,黄连素浓度为0.16～0.22 mg/ml)除空腹血糖,甘油三酯在治疗前后无显著差异外,腰围、体质量指数、腰臀围比值、胰岛素抵抗指数,血清C反应蛋白水平、游离脂肪酸明显改善,差异有显著性(P<0.05);随着腰围的增大,男性的糖代谢异常、高血压病、血脂紊乱及代谢综合征的发生率均呈现增高趋势(P<0.01)。结论:三黄口服液可明显降低代谢综合征人群肥胖和胰岛素抵抗程度,并能改善炎症状态,减轻致心血管病的危险性。     

浅谈中医养生在糖尿病中的应用

糖尿病与不健康的生活方式有着密切的联系,是一种生活方式病.以延缓衰老、延年益寿为目的 中医养生,在防治糖尿病方面发挥着积极的、不容忽视的作用.通过顺应自然、起居有常、谨和无味、饮食有节、劳逸适度、适当运动、情志调养、房事有节等方式方法 ,对糖尿病患者进行养生调摄,可协助药物治疗控制病情,提高患者的生活质量.