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1.
目的 探讨脑动脉粥样硬化性狭窄患者合并颅内动脉瘤(IA)的血流动力学特征及其危险因素。方法 收集2019年9月至2023年1月在安徽医科大学附属宿州医院接受治疗的160例脑动脉粥样硬化性狭窄患者的临床资料。所有患者均进行了CT血管成像(CTA)以及数字减影血管造影(DSA)检查,依据影像学检查结果分为合并IA组(25例)和单纯狭窄组(135例)。比较2组基线资料信息、血流动力学指标。采用多因素Logistic回归分析探讨脑动脉粥样硬化性狭窄患者合并IA的危险因素。通过受试者操作特征(ROC)曲线分析壁面切应力(WSS)及振荡切应指数(OSI)预测脑动脉粥样硬化性狭窄患者合并IA的价值。结果 合并IA组WSS、OSI均明显高于单纯狭窄组(P<0.05)。合并IA组中有吸烟史、糖尿病、高血压的百分比均高于单纯狭窄组(P<0.05)。多因素Logistic回归分析显示,吸烟史、糖尿病、高血压、WSS>0.450 Pa、OSI>0.057是脑动脉粥样硬化性狭窄患者合并IA的危险因素(P<0.05)。ROC曲线分析显示,WSS、OSI可用于预测脑动脉粥样硬化性狭窄患者合并IA,曲线下面积分别为0.857、0.784,敏感度分别为0.681、0.859,特异度分别为0.751、0.771(P<0.05)。结论 脑动脉粥样硬化性狭窄患者合并IA的危险因素包括吸烟史、糖尿病、高血压、WSS>0.450 Pa、OSI>0.057。WSS、OSI可用于预测脑动脉粥样硬化性狭窄患者合并IA。  相似文献   

2.
目的 分析抗抑郁药临床试验受试者脱落情况,讨论受试者脱落的影响因素。方法 对广州医科大学附属脑科医院2013年-2020年完成的9项抗抑郁药临床试验受试者资料进行回顾性分析,采用自编调查表采集受试者人口学资料、疾病特点及试验完成情况,分析受试者的脱落情况及影响因素。结果 共入组157例,完成120例,脱落37例。脱落原因分别为:疗效差13例(35.14%),发生不良反应12例(32.43%),撤回知情同意书8例(21.62%),失访4例(10.81%)。相关分析结果显示,受试者脱落与焦虑程度(r=0.224,P<0.01)和不良事件(r=0.158,P<0.05)呈正相关,与受教育程度(r=-0.209,P<0.01)和总体疗效(r=-0.545,P<0.01)呈负相关。二元Logistic回归分析结果显示,受教育程度(β=-0.611,OR=0.543,P<0.05)、就诊次数(β=-1.831,OR=0.160,P<0.01)和总体疗效(β=-2.286,OR=0.102,P<0.01)是受试者脱落的影响因素。结论 受教育程度低、首次就诊、疗效不佳、焦虑程度重以及发生不良事件是抗抑郁药临床试验受试者脱落的影响因素。  相似文献   

3.
目的 探讨Ⅰ型血小板结合蛋白基序的解聚蛋白样金属蛋白酶(a disintegrin and metalloproteinase with thrombospondin type 1 motifs,ADAMTS)基因多态性与脑梗死体检患者颈动脉粥样硬化性斑块易损性及阿托伐他汀降脂疗效的相关性。方法 收集2016年1月至2019年1月河北医科大学第一医院收治的684例脑梗死体检患者的临床资料,根据颈动脉超声检查结果分为稳定斑块组(338例)和易损斑块组(346例)。比较2组患者的一般资料、生化检测指标、ADAMTS rs402007(G/C)位点基因型及等位基因频率。采用Logistic回归分析探讨颈动脉粥样硬化性斑块易损性的危险因素和ADAMTS基因多态性与危险因素在颈动脉粥样硬化性斑块易损性中的交互作用。比较不同基因型患者阿托伐他汀降脂疗效,分析不同基因型与阿托伐他汀疗效的相关性。结果 稳定斑块组和易损斑块组糖尿病比例及低密度脂蛋白胆固醇(low-density lipoprotein cholesterol,LDL-C)、总胆固醇(total cholesterol,TC)、同型半胱氨酸(homocysteine,HCY)、纤维蛋白原(fibrinogen,FIB)水平的比较差异有统计学意义(P<0.05)。2组患者间GG基因型与GC+CC基因型分布的比较差异有统计学意义(P<0.05)。糖尿病、LDL-C、HCY、FIB是影响颈动脉粥样硬化性斑块易损性的危险因素(P<0.05)。LDL-C与ADAMTS基因rs402007位点存在交互作用(P<0.05)。GG、GC、CC基因型组阿托伐他汀降脂治疗有效率分别为144例(82.29%)、209例(84.27%)、233例(89.27%)。各基因型患者阿托伐他汀治疗前后血脂水平比较差异有统计学意义(P<0.05)。稳定斑块组和易损斑块组治疗前、治疗后LDL-C水平,以及治疗后高密度脂蛋白胆固醇、甘油三酯、TC水平比较差异有统计学意义(P<0.05)。以GG基因型为参考,GC基因型与阿托伐他汀治疗的疗效无相关性(P>0.05),CC基因型与疗效有相关性(P<0.05)。结论 ADAMTS基因多态性与颈动脉粥样硬化性斑块易损性存在相关性,与阿托伐他汀的降脂疗效存在相关。  相似文献   

4.
目的 分析脑动脉狭窄伴或不伴未破裂颅内动脉瘤的患者临床特征的差异。方法 回顾性收集西安交通大学第二附属医院神经内科2018年1月至2019 年12月进行数字减影血管造影检查确诊的脑动脉狭窄患者的资料。根据患者是否伴未破裂颅内动脉瘤,分为病例组(伴未破裂颅内动脉瘤)和对照组(仅存在动脉狭窄),并对2组患者的临床特征进行比较。结果 共纳入了877例脑动脉狭窄患者,其中病例组76例(8.7%)。2组高血压病史、甘油三酯、高密度脂蛋白、颅内动脉狭窄等指标的比较差异具有统计学意义(P<0.05)。2组血管炎症指标(中性粒细胞/淋巴细胞比值、血小板/淋巴细胞比值、单核细胞/淋巴细胞比值、单核细胞与高密度脂蛋白比值)水平的比较差异无统计学意义(P>0.05)。病例组中动脉瘤平均大小为(3.18±1.66)mm,常位于颈内动脉,以狭窄后动脉瘤最多见。多因素Logistic回归分析显示高血压(P=0.014)和颅内动脉狭窄(P=0.028)是脑动脉狭窄患者中出现未破裂颅内动脉瘤的危险因素。结论 患有高血压的颅内动脉狭窄患者更容易出现未破裂颅内动脉瘤。较小且无症状的未破裂颅内动脉瘤不会引起显著的炎症反应。  相似文献   

5.
目的 观察急性脑梗死(ACI)患者血浆高迁移率族蛋白B1(HMGB1)/Toll样受体4(TLR4)变化及其与脑梗死体积、神经功能缺损及预后的关系。方法 选取2018年1月至2020年7月该院收治的186例ACI患者(研究组)和45例健康人员(对照组)。研究组患者依据脑梗死体积、美国国立卫生研究院卒中量表(NIHSS)评分及预后情况进行分组。对比各组血浆HMGB1、TLR4水平;Pearson相关性分析其与脑梗死体积、神经功能缺损间的相关性;受试者工作特征(ROC)曲线评估其在预后预测中的价值。结果 研究组血浆HMGB1、TLR4水平明显高于对照组,差异有统计学意义(P<0.05)。大、中、小梗死组血浆HMGB1、TLR4水平依次递减,差异有统计学意义(P<0.05)。重、中、轻度损伤组血浆HMGB1、TLR4水平依次递减,差异有统计学意义(P<0.05)。预后良好组血浆HMGB1、TLR4水平明显低于预后不良组(P<0.05)。ACI患者的血浆HMGB1、TLR4水平与脑梗死体积、NIHSS评分均呈正相关(P<0.05)。ROC结果显示,HMGB1、TLR4用于ACI患者预后的AUC值分别为0.892、0.870。结论 ACI患者血浆HMGB1、TLR4水平与脑梗死体积、神经功能缺损相关;可用于预测ACI患者的预后。  相似文献   

6.
目的 探讨伴中重度阻塞性睡眠呼吸暂停低通气综合征(OSAHS)的抑郁症患者多导睡眠监测(PSG)特点。方法 回顾性分析2017年12月-2019年10月在苏州市广济医院睡眠医学中心完成整夜多导睡眠监测(PSG)的门诊和住院患者以及健康体检人群,从中筛选出四组被试,分别为伴中重度OSAHS的抑郁症患者(n=31)、不伴OSAHS的抑郁症患者(n=79)、中重度OSAHS患者(n=96)和正常对照组(n=32)。比较四组被试睡眠进程相关指标(总睡眠时间、睡眠潜伏期、觉醒次数)和睡眠结构相关指标(N1、N2、N3期及REM期占总睡眠时间的比例,REM潜伏期、REM期持续时间)以及睡眠呼吸相关指标(氧减指数)等参数。结果 睡眠进程方面,四组被试总睡眠时间、睡眠潜伏期和觉醒次数差异均有统计学意义(F=2.874、3.959、12.291,P<0.05或0.01)。睡眠结构方面,四组被试N2期、N3期占总睡眠时间比例差异均有统计学意义(F=13.885、48.013,P均<0.01);四组被试REM潜伏期、REM期持续时间、REM期占总睡眠时间比例差异均有统计学意义(F=41.492、11.827、10.552,P均<0.01)。睡眠呼吸相关指标方面,四组被试氧减指数差异有统计学意义(F=170.585,P<0.05)。结论 伴中重度OSAHS的抑郁症患者存在严重的睡眠进程和结构紊乱,同时伴有更频繁和更严重的呼吸相关事件。  相似文献   

7.
目的 探讨术前血小板相关参数对胶质瘤患者肿瘤复发的预测作用。方法 分析联勤保障部队第九〇九医院2015—2017年收治的93例胶质瘤患者临床病理资料,根据随访期间肿瘤是否复发分为无复发组(n=52)和复发组(n=41),分析血小板相关参数与胶质瘤分级的相关性,采用ROC曲线分析血小板计数(PLT)、血小板体积分布宽度(PDW)、血小板压积(PCT)、平均血小板体积(MPV)、平均血小板体积/血小板计数(MPV/PLT)对肿瘤复发的预测作用,多因素Cox分析肿瘤复发的影响因素,采用Kaplan-Meier曲线分析这些因素对肿瘤复发的影响。结果 胶质瘤Ⅲ、Ⅳ级患者PLT、PCT、高于胶质瘤Ⅰ、Ⅱ级患者(t=-2.388、-2.335,均P<0.05);胶质瘤Ⅲ、Ⅳ级患者中MPV、MPV/PLT低于胶质瘤Ⅰ、Ⅱ级患者(均P<0.05);无复发组患者PLT和PCT低于复发组(均P<0.05);无复发组患者MPV和MPV/PLT高于复发组(均P<0.05);PLT的ROC曲线下面积(UAC)为0.630(95%CI=0.517~0.743,P=0.032),阈值为216×109/L;MPV的UAC为0.633(95%CI=0.518~0.747,P=0.029),阈值为8.65 fL;MPV/PLT的UAC为0.731(95%CI=0.626~0.835,P<0.001),阈值为0.040;多因素分析结果发现,肿瘤分级(Ⅲ、Ⅳ)、MPV≤8.65 fL、MPV/PLT≤0.040是术后肿瘤复发的危险因素(95%CI分别为1.778~3.530、1.730~4.450、1.811~6.067,均P<0.05);肿瘤分级(Ⅲ、Ⅳ)预测术后肿瘤复发曲线下面积为0.679(95%CI=0.569~0.789,P=0.003)。Kaplan-Meier曲线分析显示,MPV≤8.65 fL患者术后3年复发率高于MPV>8.65 fL患者(Long Rank=10.990,P=0.001);MPV/PLT≤0.040患者术后3年复发率高于MPV/PLT>0.040患者(Long Rank=6.289,P=0.012)。结论 胶质瘤患者术前MPV和MPV/PLT与术后肿瘤复发有关,可以用于肿瘤预后预测,具有一定临床意义。 [国际神经病学神经外科学杂志, 2023, 50(4): 29-33]  相似文献   

8.
目的 研究缺血性脑卒中患者脑血流动力学与脑白质病变严重程度之间相关性。方法 分析2015年7月至2019年8月收治的108例缺血性脑卒中患者资料,采用Fazekas量表对患者脑白质病变严重程度进行分级。比较不同脑白质病变严重程度、患者颅内大动脉硬化程度和脑血流动力学指标,进行患者脑血流动力学与脑白质病变严重程度之间相关性分析,并分析脑白质中重度病变的危险因素。结果 Fazekas量表<3分者61例纳入轻度病变组,≥ 3分者47例纳入中重度病变组。中重度病变患者颅内大动脉硬化严重程度高于轻度病变组(P<0.05)。中重度病变组脑部动脉搏动指数(PI)显著高于轻度病变组;收缩期峰值血流(Vs)、平均血流(Vm)以及舒张末期血流(Vd)等脑血流动力学指数显著低于轻度病变组(P<0.05)。颅内大动脉硬化程度、PI与脑白质病变严重程度正相关(r=0.416,0.527;P<0.05),Vs、Vm以及Vd等脑血流参数与脑白质病变严重程度负相关(r=-0.316,-0.524,-0.668;P<0.05)。颅内大动脉硬化程度与PI为脑白质中重度病变的危险因素(P<0.05)。结论 缺血性脑卒中患者脑白质病变严重程度与患者脑血流动力学指标异常有关,而颅内动脉硬化会加重患者脑白质病变严重程度。  相似文献   

9.
目的 比较青少年抑郁障碍患者和双相情感障碍患者睡眠结构特征的差异,探讨睡眠指标等因素对患者自杀风险的影响。方法 回顾性查阅广州医科大学附属脑科医院2019年1月1日-2021年6月30日符合《国际疾病分类(第10版)》(ICD-10)诊断标准的抑郁障碍(n=97)和双相情感障碍(n=52)住院青少年患者病历资料,收集患者的年龄、性别、体质量指数(BMI)、精神科诊断、自杀风险评估量表(NGASR)评分及多导睡眠监测(PSG)结果。根据NGASR评分结果,将患者分为两组:0~5分为自杀低风险组(n=32),>5分为自杀高风险组(n=117)。以既往文献中80例正常青少年的PSG数据作为对照组资料。建立多元线性回归模型探讨青少年情感障碍患者自杀风险的影响因素。结果 自杀高风险组睡眠效率和N2期睡眠占比均低于自杀低风险组(Z=-2.138、-2.520,P均<0.05)。抑郁组总睡眠时间、N2期睡眠时间以及REM期睡眠时间均少于双相组(t=-2.822、-3.087、-2.277,P<0.05或0.01);抑郁组和双相组REM期睡眠占比均低于对照组(t=-2.369、-2.069,P均<0.05)。线性回归分析显示,青少年情感障碍患者自杀风险的影响因素包括N1期睡眠时间(β=0.019,P<0.05)、性别(男性vs.女性,β=-4.051,P<0.01)以及诊断(双相情感障碍vs.抑郁障碍,β=-1.429,P<0.05)。结论 与青少年双相情感障碍患者相比,青少年抑郁障碍患者存在睡眠连续性差、浅睡眠更少的特点。N1期睡眠时间、女性以及诊断为抑郁障碍是青少年情感障碍患者自杀的影响因素。  相似文献   

10.
背景 精神科危重症患者谵妄发生率较高,且影响谵妄发生的因素较多。目前针对精神专科医院危重症患者谵妄的流行病学研究有限。目的 探索精神专科医院危重症患者谵妄发生的影响因素,以指导临床对谵妄的管理。方法 回顾性收集2019年1月1日-2021年5月31日在深圳市康宁医院住院的427例危重症患者的谵妄发生情况、性别、年龄、入院前病程(指患者始发急性精神状态变化至登记入住精神专科医院的时间)、精神疾病史、认知功能障碍病史、精神活性物质使用史、镇静催眠药使用史、合并慢性病数、合并用药数以及病种类型等信息。采用单因素Logistic回归分析谵妄发生的可能危险因素,将可能的危险因素纳入多因素Logistic回归分析模型,逐步筛选出精神专科医院危重症患者谵妄发生的危险因素。结果 在427例危重症患者中,143例(33.49%)存在谵妄。多因素Logistic回归分析结果显示,使用精神活性物质所致的精神和行为障碍(OR=8.949,P<0.01)、无精神病病史(OR=4.202,P<0.01)、合并慢性病数(OR=1.249,P<0.01)、年龄(OR=1.031,P<0.01)以及入院前病程(OR=0.942,P<0.01)与谵妄发生相关。结论 在精神专科医院中,约1/3的危重症患者存在谵妄,入院前病程较短、年龄较大、合并慢性疾病数多、无精神疾病史、使用精神活性物质所致的精神和行为障碍是谵妄发生的危险因素。  相似文献   

11.
视频脑电图在小儿癫痫诊断中的应用   总被引:1,自引:0,他引:1  
目的评价视频脑电图(video-EEG)在小儿癫诊断中的应用价值。方法对126例具有发作性症状的患儿进行连续8h的包括清醒、睡眠、诱发试验及必要的认知测验的视频脑电图监测。结果经发作期视频脑电图证实,39例初诊为癫性发作的患儿中14例(35%)为非癫性发作;15例其他症状发作中13例(86%)为非癫性发作。64例样放电患儿中51例(80%)确定发作类型,22例(34%)确定癫类型。视频脑电图可发现短暂轻微的癫发作及样放电引起的一过性认知损伤。结论视频脑电图在排除非癫性发作、确定癫性发作的类型、评价脑电-临床关系方面可提供准确可靠的证据,进一步提高癫的临床诊断水平。  相似文献   

12.
The pathogenesis of stroke, trauma and chronic degenerative diseases, such as Alzheimer's disease (AD), has been linked to excitotoxic processes due to inappropriate stimulation of the N-methyl-D-aspartate receptor (NMDA-R). Attempts to use potent competitive NMDA-R antagonists as neuroprotectants have shown serious side-effects in patients. As an alternative approach, we were interested in the anti-excitotoxic properties of memantine, a well-tolerated low affinity uncompetitive NMDA-R antagonist presently used as an anti-dementia agent. We explored in a series of models of increasing complexity, whether this voltage-dependent channel blocker had neuroprotective properties at clinically relevant concentrations. As expected, memantine protected neurons in organotypic hippocampal slices or dissociated cultures from direct NMDA-induced excitotoxicity. However, low concentrations of memantine were also effective in neuronal (cortical neurons and cerebellar granule cells) stress models dependent on endogenous glutamate stimulation and mitochondrial stress, i.e. exposure to hypoxia, the mitochondrial toxin 1-methyl-4-phenylpyridinium (MPP+) or a nitric oxide (NO) donor. Furthermore, memantine reduced lethality and brain damage in vivo in a model of neonatal hypoxia-ischemia (HI). Finally, we investigated functional rescue (neuronal capacity to migrate along radial glia) by memantine in cerebellar microexplant cultures exposed to the indirect excitotoxin 3-nitropropionic acid (3-NP). Potent NMDA-R antagonists, such as (+)MK-801, are known to block neuronal migration in microexplant cultures. Interestingly, memantine significantly restored the number of neurons able to migrate out of the stressed microexplants. These findings suggest that inhibition of the NMDA-R by memantine is sufficient to block excitotoxicity, while still allowing some degree of signalling.  相似文献   

13.
Summary A histochemical and ultrastructural study was made on the brain of a 23-year-old man with Sanfilippo's syndrome. In accordance with previous reports the cortical nerve cells contained a PAS-positive lipid storage substance. This showed intense autofluorescence in UV-light and was positive with various stains for lipofuscin. The storage material appeared ultrastructurally as inclusion bodies composed of short lamellated membranes, granular material, and vacuoles. In addition, concentrically and transversely lamellated membranous cytoplasmic bodies were observed in the nerve cells. It is concluded that the PAS-positive lipid storage material in the neurons was composed partly of lipofuscin in addition to other lipids presumably glycosphingolipids.Supported by a grant from the Expressen Prenatal Research Foundation  相似文献   

14.
脑电图预测痫性发作研究进展   总被引:1,自引:0,他引:1  
癫痫(epilepsy)是由脑部神经元高度同步化异常放电所致的临床综合征,系神经系统的常见病,困扰着全世界约1%的人群.每次神经元的阵发性放电或短暂的脑功能异常称为痫性发作(seizures).  相似文献   

15.
Midazolam is a recently developed water-soluble benzodiazepine that shares anxiolytic, muscle relaxant, hypnotic and anticonvulsant actions with other members of this class. There are limited studies that midazolam can be used successfully to treat seizures in adults and children. In this study, 0.2 mg/kg intramuscular (IM) midazolam was administered to 11 children (eight boys and three girls), aged 3 days to 4 years (mean age 1.8±1.4 years), with seizures of various types. In all but one child, seizures stopped in 15 s–5 min after injection. No side effects were observed. These results suggest that IM administration of midazolam may be useful in a variety of seizures during childhood, especially in case of intravenous (IV) line problem.  相似文献   

16.
Objective: Vincristine, a microtubule-destabilizing drug, was found to exhibit anti-angiogenic effects and anti-tumoral activity. However, the precise mechanism by which vincristine inhibits angiogenesis in glioblastomas is not well understood. Our aim was to investigate whether vincristine affects vascular endothelial growth factor (VEGF) expression in glioblastoma cells and determine whether it is mediated by the downregulation of hypoxia-inducible factor-1α (HIF-1α).

Methods: We investigated the expression of HIF-1α in glioblastoma tissues resected from patients and in human glioblastoma cell lines using immunohistochemistry, Western blot analysis, and immunocytochemistry. In addition to an MTT assay assessing the effect of vincristine on cell proliferation and viability, the effects of vincristine on VEGF mRNA expression and HIF-1α protein were examined using real-time RT-PCR and Western blot analysis under 1% O2 (hypoxia).

Results: HIF-1α was expressed in the majority of glioblastoma tissues and was detected mainly in the nucleus. Strong immunoreactivity for HIF- 1 α was found often in the hypercellular zones. Under hypoxic conditions, HIF-1α protein levels in the glioblastoma cell lines increased, primarily localizing into the nucleus similar to glioblastoma tissues. Exposure of glioblastoma cells to vincristine resulted in enrichment of the G2-M fraction of the cell cycle, which suggests that vincristine-mediated growth inhibition of glioblastoma is correlated with mitotic inhibition. Using doses lower than those found to reduce the viability and proliferation of cells by 50% (IC50), vincristine decreased both the expression of VEGF mRNA and the level of HIF-1α protein in hypoxic glioblastoma cells. In addition, following exposure to vincristine, the expression of VEGF mRNA was correlated with HIF-1α protein levels.

Conclusions: Our results suggest that the mechanism by which vincristine elicits an anti-angiogenic effect in glioblastomas under hypoxic conditions might be mediated, in part, by HIF-1α inhibition.  相似文献   

17.
ObjectiveCurrent nosology redefined agoraphobia as an autonomous diagnosis distinct from panic disorder. We investigated the lifetime prevalence of agoraphobia, its association with other mental disorders, and its impact on the health-related quality of life (HR-QoL). MethodsCommunity survey in 2,338 randomly selected adult subjects. Participants were interviewed with the Advanced Neuropsychiatric Tools and Assessment Schedule (ANTAS), administered by clinicians. The diagnoses were based on the ICD-10 criteria. The Short-Form Health Survey (SF-12) was used to quantify HR-QoL. ResultsIn the sample, 35 subjects met the criteria for agoraphobia (1.5%), with greater prevalence among women (2.0%) than men (0.9%): odds ratio (OR) 2.23; 95% CI: 1.0-5–2. Agoraphobia was more often seen among those with (n=26; 1.1%) than without (n=9; 0.4%) panic disorder: OR=8.3; 2.9–24.4. Co-morbidity with other mental disorders was substantial. The mean score of SF-12 in people with agoraphobia was 35.2±7.8, with similar levels of HR-QoL in people with (35.3±7.9) or without (34.8±7.3) panic disorder: ANOVA: F(1;33)=0.0; p=1.00. ConclusionOne out of seventy people may suffer from agoraphobia in their lifetime. The attributable burden in terms of HR-QoL is substantial and comparable to the one observed for chronic mental disorders such as major depression, post-traumatic stress disorder, or obsessive-compulsive disorder.  相似文献   

18.
近年来,蛋白质的降解障碍被认为是帕金森病(Parkinson’Sdisease,PD)发病过程中的重要因素,人们已经公认泛素一蛋白酶体系统(ubiquitin--pro—teasomesystem,UPS)功能异常或衰竭能够导致细胞内异常蛋白蓄积、细胞功能障碍,甚至细胞凋亡。与此同时,蛋白降解的另一条途径——自噬-溶酶体途径(autophagy—lysosomepathway,ALP)也已成为了生命科学领域的研究热点,自噬与神经变性疾病,尤其是PD的关系日益受到人们的重视。  相似文献   

19.
Recent studies have indicated that nociceptors can be classified into various types according to their physiological properties. These studies have clarified that the frequency distribution of various nociceptor types is different among body sites and animal species. In the present study, we investigated the physiological properties of rat's periodontal nociceptors in an in vitro jaw-nerve preparation. Responses were recorded from functional single filaments in the inferior alveolar nerve. To determine the nociceptor type, calibrated von Frey filaments, heat, and bradykinin (BK) stimuli were used. We found five subtypes of nociceptors in the periodontal ligaments of the lower incisor: Adelta-high threshold mechanonociceptors (Adelta-HTM, n=28), Adelta-mechanoheat nociceptors (Adelta-MH, n=6), Adelta-polymodal nociceptors (Adelta-POLY, n=26), C-high threshold mechanonociceptors (C-HTM, n=3) and C-polymodal nociceptors (C-POLY, n=4). Most nociceptors were Adelta-innervated, while only a small number of C-innervated nociceptors were found. The present results suggest that periodontal nociceptors transmit mainly fast pain, and may thus play a role in rapid detection of injure-related stimuli during mastication.  相似文献   

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