BACKGROUND： Rho GTPase family members have been shown to participate in neurite growth by regulating the neuronal cytoskeleton. However, there are very few reports of developmental roles of signaling molecules relate...BACKGROUND： Rho GTPase family members have been shown to participate in neurite growth by regulating the neuronal cytoskeleton. However, there are very few reports of developmental roles of signaling molecules related to Rho GTPases. OBJECTIVE： To investigate messenger ribonucleic acid mRNA expression of signaling molecules associated with Rho GTPases, including Rho-A, Rac-1, collapsin response mediator protein 1 （CRMP-1）, and tubulin 133 （Tub/33） during rat hippocampus development. DESIGN, TIME AND SETTING- A non-randomized, controlled, animal experiment, based on different developmental stages of the rat hippocampus, was performed at the Guangdong Key Laboratory of Tissue Construction and Detection, Institute of Clinical Anatomy, Southern Medical University between December 2005 and July 2007. MATERIALS： Trizol reagent was purchased from Invitrogen, USA. RNA PCR kit （AMV） Ver 3.0 and 150 bp DNA Ladder Marker were purchased from TaKaRa, Japan. Unless otherwise specified, all other reagents were purchased from Sigma-Aldrich, USA. METHODS： Twenty-five Sprague Dawley rats were assigned to five groups （n = 5） according to developmental stages： embryonic （embryonic 15 days）, neonatal （postnatal 5 days）, juvenile （postnatal 1 month）, adult （postnatal 3 months）, and senile （postnatal 18 months）. MAIN OUTCOME MEASURES： Detection of mRNA expression of Rho-A, Rac-1, CRMP-1, and Tub β3 during various hippocampal developmental stages by reverse-transcription polymerase chain reaction. RESULTS： Hippocampal mRNA expression of Rho-A, as well as Rac-1, reached peak levels at embryonic, juvenile, and senile stages, and was relatively less during neonatal and adult stages. mRNA expression of Rac-1 was greater than Rho-A during each hippocampal developmental stage. CRMP-1 mRNA expression levels were as follows： embryonic 〉 neonatal 〉 juvenile 〉 adult 〈 senile, while Tubβ3 mRNA expression was embryonic 〉 neonatal 〉 juvenile 〉 adult = senile. CONCLUSION： Rho-A and Rac-1 shared similar expression profiles, which demonstrated similar variations during the entire rat hippocampus developmental process. However, Rac-1 mRNA expression remained greater than Rho-A. Both CRMP-1 and Tubβ3 mRNA expression profiles gradually declined during hippocampal development from embryonic to adult stages. Tubβ3 mRNA expression arrested during the adult stage, and CRMP-1 mRNA expression increased during the senile stage.展开更多
In this study, we investigated the effect of exogenous sodium benzoate on wheat seedlings(Yangmai 16) grown under heavy metal stress. The results showed that 2.4 mmol kg-1 of heavy metals significantly inhibited growt...In this study, we investigated the effect of exogenous sodium benzoate on wheat seedlings(Yangmai 16) grown under heavy metal stress. The results showed that 2.4 mmol kg-1 of heavy metals significantly inhibited growth and delayed emergence of wheat seedlings. Under compound heavy metal stress, application of 2-4 g L^-1 sodium benzoate significantly increased(P<0.01) chlorophyll content and chlorophyll fluorescence parameters Fv/Fm and Fv/Fo of wheat, compared to the control(water treatment). Further analysis showed that application of 2-4 g L^-1 sodium benzoate alleviated osmotic stress by promoting the accumulation of osmolytes such as soluble proteins and free proline, increased the activity of superoxide dismutase(SOD) and reduced malondialdehyde content(MDA). In contrast, higher concentrations of sodium benzoate solution(>6 g L^-1) inhibited the growth of wheat seedlings and even caused damage to seedlings. Correlation analysis showed that when the sodium benzoate concentration was in the range of 1.97-3.12 g L^-1(2016) and 1.58-3.27 g L^-1(2017), values of chlorophyll and its components, root activity, SOD activity, soluble protein, and free proline content were the highest. When the sodium benzoate concentration was raised to 2.59 g L^-1(2016) or 3.02 g L^-1(2017), MDA content was the lowest. Ultimately, exogenous sodium benzoate(2-4 g L^-1) facilitates root development and improves the root activity of wheat seedlings grown under compound heavy metals stress, thereby effectively alleviating the damage of compound heavy metal stress in wheat seedlings.展开更多
With the widespread adoption of ultrasound guidance,Seldinger puncture techniques,and intracardiac electrical positioning technology for the placement of peripherally inserted central catheters in recent years,an incr...With the widespread adoption of ultrasound guidance,Seldinger puncture techniques,and intracardiac electrical positioning technology for the placement of peripherally inserted central catheters in recent years,an increasing number of medical staff and patients now accept peripheral placement of totally implantable venous access devices(TIVADs)in the upper arm.This approach has the advantage of completely avoiding the risks of hemothorax,pneumothorax,and neck and chest scarring.Medical specialties presently engaged in this study in China include internal medicine,surgery,anesthesiology,and interventional departments.However,command over implantation techniques,treatment of complications,and proper use and maintenance of TIVAD remain uneven among different medical units.Moreover,currently,there are no established quality control standards for implantation techniques or specifications for handling complications.Thus,this expert consensus is proposed to improve the success rate of TIVAD implantation via the upper-arm approach,reduce complication rates,and ensure patient safety.This consensus elaborates on the technical indications and contraindications,procedures and technical points,treatment of complications,and the use and maintenance of upper-arm TIVAD,thus providing a practical reference for medical staff.展开更多
目的观察电生理适宜技术治疗ⅢB型慢性前列腺炎(chronic prostatitis,CP)的临床疗效,为电生理适宜技术在男科疾病诊治中的应用提供临床数据。方法通过自身配对前后对照方法研究2021年12月至2022年11月在柳州市柳铁中心医院男科行电生理...目的观察电生理适宜技术治疗ⅢB型慢性前列腺炎(chronic prostatitis,CP)的临床疗效,为电生理适宜技术在男科疾病诊治中的应用提供临床数据。方法通过自身配对前后对照方法研究2021年12月至2022年11月在柳州市柳铁中心医院男科行电生理适宜技术治疗的ⅢB型慢性前列腺炎患者,根据纳入和排除标准共收集31例。所有研究对象治疗前后分别行可视化精准电生理诊断(visual and accurate electrophysiological diagnosis,VAED)及填写慢性前列腺炎症状指数(NIH-CPSI)评分、慢性前列腺炎症状严重程度(CP/CPSI)评分表、国际前列腺症状评分(IPSS)及焦虑症筛查量表(GAD-7),观察临床疗效。结果治疗后NIH-CPSI评分、CP/CPSI评分、IPSS评分、GAD-7评分均低于治疗前,差异有统计学意义(均P<0.05)。VAED扫描后热像图(TMT)显示腹股沟最低温度、腹股沟平均温度均低于治疗前,差异有统计学意义(均P<0.05)。结论电生理适宜技术治疗ⅢB型慢性前列腺炎安全、疗效肯定,可显著改善患者疼痛、焦虑症状,提高生活质量。展开更多
Massage in traditional Chinese medicine can promote body and brain development of premature and normal newborn infants. In the present study, neonatal rats （1 day old） underwent paravertebral fascial massage （15 co...Massage in traditional Chinese medicine can promote body and brain development of premature and normal newborn infants. In the present study, neonatal rats （1 day old） underwent paravertebral fascial massage （15 consecutive days）, followed by subcutaneous injection of insulin-like growth factor 1 receptor antagonist, JB1 （9 consecutive days）. Paravertebral fascial massage significantly increased insulin-like growth factor 1 expression and cell proliferation in the subventricular zone of the lateral ventricle and dentate gyrus of the hippocampus. However, JB1 inhibited this increase. Results suggest that paravertebral fascial massage can promote brain development of neonatal rats via the insulin-like growth factor I pathway.展开更多
立足于企业科技强国战略,推动交叉工程项目发展,深化企业跨领域技术,本文提出一种基于二重BERT(bidirectional encoder representations from transformers)文本分类模型实现企业技术分布匹配的策略。首先,基于深度学习,本文构建了4种B...立足于企业科技强国战略,推动交叉工程项目发展,深化企业跨领域技术,本文提出一种基于二重BERT(bidirectional encoder representations from transformers)文本分类模型实现企业技术分布匹配的策略。首先,基于深度学习,本文构建了4种BERT模型,结合工程专业标签,对7万条专利文本进行预训练,实现企业属性识别;构建标签张力矩阵,计算加权余弦相似函数,实现技术合作匹配模块,筛选合作者。其次,基于时序分析,实现合作企业间的技术竞合追踪,确定合作程度范围,从“静态”和“动态”角度,为企业跨领域技术合作提出一种定量策略,补充了现有研究针对该问题的系统性、动态性缺陷。最后,选用生物医药工程高成长企业展开实例分析,证实了本文方法的可靠性。展开更多
基金Supported by:the National Basic Research Program of China(973 Program),No. 2007CB512705the Natural Science Foundation of Guangdong Province,No. 8451063201000193
文摘BACKGROUND： Rho GTPase family members have been shown to participate in neurite growth by regulating the neuronal cytoskeleton. However, there are very few reports of developmental roles of signaling molecules related to Rho GTPases. OBJECTIVE： To investigate messenger ribonucleic acid mRNA expression of signaling molecules associated with Rho GTPases, including Rho-A, Rac-1, collapsin response mediator protein 1 （CRMP-1）, and tubulin 133 （Tub/33） during rat hippocampus development. DESIGN, TIME AND SETTING- A non-randomized, controlled, animal experiment, based on different developmental stages of the rat hippocampus, was performed at the Guangdong Key Laboratory of Tissue Construction and Detection, Institute of Clinical Anatomy, Southern Medical University between December 2005 and July 2007. MATERIALS： Trizol reagent was purchased from Invitrogen, USA. RNA PCR kit （AMV） Ver 3.0 and 150 bp DNA Ladder Marker were purchased from TaKaRa, Japan. Unless otherwise specified, all other reagents were purchased from Sigma-Aldrich, USA. METHODS： Twenty-five Sprague Dawley rats were assigned to five groups （n = 5） according to developmental stages： embryonic （embryonic 15 days）, neonatal （postnatal 5 days）, juvenile （postnatal 1 month）, adult （postnatal 3 months）, and senile （postnatal 18 months）. MAIN OUTCOME MEASURES： Detection of mRNA expression of Rho-A, Rac-1, CRMP-1, and Tub β3 during various hippocampal developmental stages by reverse-transcription polymerase chain reaction. RESULTS： Hippocampal mRNA expression of Rho-A, as well as Rac-1, reached peak levels at embryonic, juvenile, and senile stages, and was relatively less during neonatal and adult stages. mRNA expression of Rac-1 was greater than Rho-A during each hippocampal developmental stage. CRMP-1 mRNA expression levels were as follows： embryonic 〉 neonatal 〉 juvenile 〉 adult 〈 senile, while Tubβ3 mRNA expression was embryonic 〉 neonatal 〉 juvenile 〉 adult = senile. CONCLUSION： Rho-A and Rac-1 shared similar expression profiles, which demonstrated similar variations during the entire rat hippocampus developmental process. However, Rac-1 mRNA expression remained greater than Rho-A. Both CRMP-1 and Tubβ3 mRNA expression profiles gradually declined during hippocampal development from embryonic to adult stages. Tubβ3 mRNA expression arrested during the adult stage, and CRMP-1 mRNA expression increased during the senile stage.
基金supported by the National Key Research and Development Program of China(2017YFD0201306)the National Natural Science Foundation of China(31671613,31471435)+2 种基金the Ph D Programs Foundation of Jiangsu Province,China(1601116C)the Priority Academic Program Development of Jiangsu Higher Education Institutions,Chinathe Top-Notch Academic Programs Project of Jiangsu Higher Education Institutions,China(PPZY2015A060)。
文摘In this study, we investigated the effect of exogenous sodium benzoate on wheat seedlings(Yangmai 16) grown under heavy metal stress. The results showed that 2.4 mmol kg-1 of heavy metals significantly inhibited growth and delayed emergence of wheat seedlings. Under compound heavy metal stress, application of 2-4 g L^-1 sodium benzoate significantly increased(P<0.01) chlorophyll content and chlorophyll fluorescence parameters Fv/Fm and Fv/Fo of wheat, compared to the control(water treatment). Further analysis showed that application of 2-4 g L^-1 sodium benzoate alleviated osmotic stress by promoting the accumulation of osmolytes such as soluble proteins and free proline, increased the activity of superoxide dismutase(SOD) and reduced malondialdehyde content(MDA). In contrast, higher concentrations of sodium benzoate solution(>6 g L^-1) inhibited the growth of wheat seedlings and even caused damage to seedlings. Correlation analysis showed that when the sodium benzoate concentration was in the range of 1.97-3.12 g L^-1(2016) and 1.58-3.27 g L^-1(2017), values of chlorophyll and its components, root activity, SOD activity, soluble protein, and free proline content were the highest. When the sodium benzoate concentration was raised to 2.59 g L^-1(2016) or 3.02 g L^-1(2017), MDA content was the lowest. Ultimately, exogenous sodium benzoate(2-4 g L^-1) facilitates root development and improves the root activity of wheat seedlings grown under compound heavy metals stress, thereby effectively alleviating the damage of compound heavy metal stress in wheat seedlings.
文摘With the widespread adoption of ultrasound guidance,Seldinger puncture techniques,and intracardiac electrical positioning technology for the placement of peripherally inserted central catheters in recent years,an increasing number of medical staff and patients now accept peripheral placement of totally implantable venous access devices(TIVADs)in the upper arm.This approach has the advantage of completely avoiding the risks of hemothorax,pneumothorax,and neck and chest scarring.Medical specialties presently engaged in this study in China include internal medicine,surgery,anesthesiology,and interventional departments.However,command over implantation techniques,treatment of complications,and proper use and maintenance of TIVAD remain uneven among different medical units.Moreover,currently,there are no established quality control standards for implantation techniques or specifications for handling complications.Thus,this expert consensus is proposed to improve the success rate of TIVAD implantation via the upper-arm approach,reduce complication rates,and ensure patient safety.This consensus elaborates on the technical indications and contraindications,procedures and technical points,treatment of complications,and the use and maintenance of upper-arm TIVAD,thus providing a practical reference for medical staff.
文摘目的观察电生理适宜技术治疗ⅢB型慢性前列腺炎(chronic prostatitis,CP)的临床疗效,为电生理适宜技术在男科疾病诊治中的应用提供临床数据。方法通过自身配对前后对照方法研究2021年12月至2022年11月在柳州市柳铁中心医院男科行电生理适宜技术治疗的ⅢB型慢性前列腺炎患者,根据纳入和排除标准共收集31例。所有研究对象治疗前后分别行可视化精准电生理诊断(visual and accurate electrophysiological diagnosis,VAED)及填写慢性前列腺炎症状指数(NIH-CPSI)评分、慢性前列腺炎症状严重程度(CP/CPSI)评分表、国际前列腺症状评分(IPSS)及焦虑症筛查量表(GAD-7),观察临床疗效。结果治疗后NIH-CPSI评分、CP/CPSI评分、IPSS评分、GAD-7评分均低于治疗前,差异有统计学意义(均P<0.05)。VAED扫描后热像图(TMT)显示腹股沟最低温度、腹股沟平均温度均低于治疗前,差异有统计学意义(均P<0.05)。结论电生理适宜技术治疗ⅢB型慢性前列腺炎安全、疗效肯定,可显著改善患者疼痛、焦虑症状,提高生活质量。
基金supported by the National Basic Research Program of China (973 Program), No. 2007CB512705the General Program for Youths of the National Nature science Foundation of China, No. 30801464
文摘Massage in traditional Chinese medicine can promote body and brain development of premature and normal newborn infants. In the present study, neonatal rats （1 day old） underwent paravertebral fascial massage （15 consecutive days）, followed by subcutaneous injection of insulin-like growth factor 1 receptor antagonist, JB1 （9 consecutive days）. Paravertebral fascial massage significantly increased insulin-like growth factor 1 expression and cell proliferation in the subventricular zone of the lateral ventricle and dentate gyrus of the hippocampus. However, JB1 inhibited this increase. Results suggest that paravertebral fascial massage can promote brain development of neonatal rats via the insulin-like growth factor I pathway.
文摘立足于企业科技强国战略,推动交叉工程项目发展,深化企业跨领域技术,本文提出一种基于二重BERT(bidirectional encoder representations from transformers)文本分类模型实现企业技术分布匹配的策略。首先,基于深度学习,本文构建了4种BERT模型,结合工程专业标签,对7万条专利文本进行预训练,实现企业属性识别;构建标签张力矩阵,计算加权余弦相似函数,实现技术合作匹配模块,筛选合作者。其次,基于时序分析,实现合作企业间的技术竞合追踪,确定合作程度范围,从“静态”和“动态”角度,为企业跨领域技术合作提出一种定量策略,补充了现有研究针对该问题的系统性、动态性缺陷。最后,选用生物医药工程高成长企业展开实例分析,证实了本文方法的可靠性。
