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DNA光解酶模型研究的近期进展

有机化学 2007年第8期27卷 918-924页

作者：季学保宋钦华中国科学技术大学化学系合肥230026

用模型化合物来模拟DNA光解酶与底物的作用,有助于认识DNA光复活作用机理.评述了环丁烷型嘧啶二聚体光解酶和(6-4)光产物光解酶的模型研究进展,并展望了该领域的发展前景.

关键词： DNA光解酶环丁烷型嘧啶二聚体 (6-4)光产物模型研究

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海南汉族血清维生素D水平与骨质疏松相关性

现代预防医学 2012年第7期39卷 1698-1699页

作者：孙胜花宋钦华海南医学院附属医院内分泌科

目的探讨海南汉族血清维生素D水平与骨质疏松的关系。方法选择年龄50～60岁骨质疏松患者334例及相应年龄段正常对照301例进行骨密度、血清25羟维生素D3水平测定。结果维生素D水平在两组之间存在显著差异。结论海南汉族血清中维生素D3水... 详细信息

目的探讨海南汉族血清维生素D水平与骨质疏松的关系。方法选择年龄50～60岁骨质疏松患者334例及相应年龄段正常对照301例进行骨密度、血清25羟维生素D3水平测定。结果维生素D水平在两组之间存在显著差异。结论海南汉族血清中维生素D3水平下降与骨质疏松症的发生密切相关,对海南人群骨质疏松症的预防及治疗具有指导意义。

关键词：骨质疏松骨密度 25羟-维生素D3

Potential role of tanycyte-derived neurogenesis in Alzheimer's disease

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Neural Regeneration Research 2025年第6期20卷 1599-1612页

作者： Guibo Qi Han Tang Jianian Hu Siying Kang song qin Department of Anatomy Histologyand EmbryologySchool of Basic Medical SciencesFudan UniversityShanghaiChina State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science Fudan UniversityShanghaiChina

Tanycytes, specialized ependymal cells located in the hypothalamus, play a crucial role in the generation of new neurons that contribute to the neural circuits responsible for regulating the systemic energy balance. The precise coordination of the gene networks controlling neurogenesis in naive and mature tanycytes is essential for maintaining homeostasis in adulthood. However, our understanding of the molecular mechanisms and signaling pathways that govern the proliferation and differentiation of tanycytes into neurons remains limited. This article aims to review the recent advancements in research into the mechanisms and functions of tanycyte-derived neurogenesis. Studies employing lineage-tracing techniques have revealed that the neurogenesis specifically originating from tanycytes in the hypothalamus has a compensatory role in neuronal loss and helps maintain energy homeostasis during metabolic diseases. Intriguingly,metabolic disorders are considered early biomarkers of Alzheimer's disease. Furthermore,the neurogenic potential of tanycytes and the state of newborn neurons derived from tanycytes heavily depend on the maintenance of mild microenvironments, which may be disrupted in Alzheimer's disease due to the impaired blood–brain barrier ***, the specific alterations and regulatory mechanisms governing tanycyte-derived neurogenesis in Alzheimer's disease remain unclear. Accumulating evidence suggests that tanycyte-derived neurogenesis might be impaired in Alzheimer's disease, exacerbating neurodegeneration. Confirming this hypothesis, however, poses a challenge because of the lack of long-term tracing and nucleus-specific analyses of newborn neurons in the hypothalamus of patients with Alzheimer's disease. Further research into the molecular mechanisms underlying tanycyte-derived neurogenesis holds promise for identifying small molecules capable of restoring tanycyte proliferation in neurodegenerative diseases. This line of investigation could pro

关键词： Alzheimer's disease blood–brain barrier ependymoglial cells hypothalamus metabolic diseases neural stem cells neurogenesis neuroinflammatory diseases neurons tanycyte

成人隐匿性自身免疫糖尿病32例临床特征分析

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现代预防医学 2012年第8期39卷 2065-2066+2068页

作者：孙胜花宋钦华李大伟海南医学院附属医院内分泌科

目的观察分析成人隐匿性自身免疫糖尿病(LADA)患者的临床特征,提高其防治水平。方法将32例GAD-Ab阳性LADA患者作为研究对象,均测量身高、体重、腰臀比、血压,并测定空腹血糖、血脂、C肽、HbA1c和标准餐后2h血糖、C肽。结果 LADA患者发... 详细信息

目的观察分析成人隐匿性自身免疫糖尿病(LADA)患者的临床特征,提高其防治水平。方法将32例GAD-Ab阳性LADA患者作为研究对象,均测量身高、体重、腰臀比、血压,并测定空腹血糖、血脂、C肽、HbA1c和标准餐后2h血糖、C肽。结果 LADA患者发病年龄范围较广,胰岛素的分泌能力较T2DM差,存在胰岛素抵抗。部分患者体形肥胖,伴有高血压和(或)血脂异常。结论 LADA患者既存在胰岛素缺乏,又有胰岛素抵抗,LADA患者诊断后需要尽早使用胰岛素治疗,可联用胰岛素增敏剂治疗改善胰岛素抵抗。

关键词：成人隐匿性自身免疫糖尿病谷氨酸脱羧酶抗体胰岛素抵抗

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2型糖尿病与恶性肿瘤相关性临床分析

现代预防医学 2011年第12期38卷 2440-2441+2444页

作者：谭丽玲宋钦华海南省海南医学院附属医院老年内分泌科

[目的]探讨2型糖尿病与恶性肿瘤的相关性及临床意义。[方法]调查了2004~2009年期间在本院住院的103例2型糖尿病并有恶性肿瘤患者(含死亡患者),据患者的年龄存在分为中年组和老年组,比较两组之间人数构成、性别、体重以及部分血生化学检... 详细信息

[目的]探讨2型糖尿病与恶性肿瘤的相关性及临床意义。[方法]调查了2004~2009年期间在本院住院的103例2型糖尿病并有恶性肿瘤患者(含死亡患者),据患者的年龄存在分为中年组和老年组,比较两组之间人数构成、性别、体重以及部分血生化学检查等指标,同时分析肿瘤的发病率和分布情况。[结果]2型糖尿病患者并有恶性肿瘤发生率以老年人且男性多见;以消化道肿瘤最多见、其次是血液系统肿瘤及肺癌,HOMA-IR、血脂等水平升高。[结论]2型糖尿病好伴发恶性肿瘤,且有其特殊的分布规律。恶性肿瘤的发生与胰岛素抵抗有一定的关系。

关键词： 2型糖尿病恶性肿瘤胰岛素抵抗

来得时(甘精胰岛素)联合文达敏对初诊2型糖尿病治疗有效性及对β细胞功能变化的影响

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现代预防医学 2011年第4期38卷 771-772页

作者：谭丽玲宋钦华海南省海南医学院附属医院老年内分泌科

[目的]比较来得时(甘精胰岛素)联合文达敏(二甲双胍马来酸罗格列酮)与预混胰岛素注射两种方案的血糖控制情况和对胰岛细胞功能的影响。[方法]46例初次诊断的2型糖尿病患者随机分成来得时联合口服文达敏组(A组,n=25)和预混人胰岛素30R皮... 详细信息

[目的]比较来得时(甘精胰岛素)联合文达敏(二甲双胍马来酸罗格列酮)与预混胰岛素注射两种方案的血糖控制情况和对胰岛细胞功能的影响。[方法]46例初次诊断的2型糖尿病患者随机分成来得时联合口服文达敏组(A组,n=25)和预混人胰岛素30R皮下注射组(B组,n=21),治疗3个月。测定每组治疗前后FPG、2hPG、糖化血红蛋白(HbA1c)、体重指数(BMI)、胰岛素、C-肽,计算胰岛细胞功能指数(Homa-β)、胰岛素抵抗指数(Homa-IR)。[结果]两组治疗后FBG、2hPG、HbA1c较治疗前明显下降(P﹤0.01);Homa-β较治疗前明显增加,Homa-IR明显下降,差异均有统计学意义(P﹤0.01)。组间Homa-β、Homa-IR比较也有统计学差异,A组胰岛素用量与B组的差异有统计学意义(P﹤0.01)。[结论]来得时联合口服文达敏治疗初诊2型糖尿病患者不仅能有效控制血糖,而且能较好改善β细胞功能,使用方便、患者依从性好,低血糖发生率低。

关键词： 2型糖尿病来得时 β细胞功能

An efficient quantum proactive incremental learning algorithm

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 49-57页

作者： Lingxiao Li Jing Li Yanqi song Sujuan qin Qiaoyan Wen Fei Gao State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications School of Cyberspace Security Beijing University of Posts and Telecommunications

In scenarios where a large amount of data needs to be learned, incremental learning can make full use of old knowledge, significantly reduce the computational cost of the overall learning process, and maintain high performance. In this paper, taking the MaxCut problem as our example, we introduce the idea of incremental learning into quantum computing, and propose a Quantum Proactive Incremental Learning algorithm(QPIL). Instead of a one-off training of quantum circuit, QPIL contains a multi-phase training on gradually-increased subgraphs of all vertices, proactively reducing large-scale problems to smaller ones to solve in steps, providing an efficient solution for MaxCut. Specifically, some vertices and corresponding edges are randomly selected for training to obtain optimized parameters of the quantum circuit at first. Then, in each incremental phase, the remaining vertices and corresponding edges are gradually added and the parameters obtained from the previous phase are reused in the parameter initialization of the current phase. We perform experiments on 120 different small-scale graphs, and it shows that QPIL performs superior to prevalent quantum and classical baselines in terms of approximation ratio(AR), time cost, anti-forgetting, and solving stability. In particular, QPIL's AR surpasses 20% of mainstream quantum baselines, and the time cost is less than 1/5 of them. The idea of QPIL is expected to inspire efficient and high-quality solutions in large-scale Max Cut and other combinatorial optimization problems.

关键词： variational quantum algorithm incremental learning multi-phase training MaxCut quantum computing

4-硝基喹啉氧化物激发三重态与甲硫氨酸二肽之间的电子转移

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高等学校化学学报 2000年第7期21卷 1067-1069页

作者：徐业平宋钦华俞书勤陈从香马兴孝林维真姚思德中国科学技术大学化学物理系中国科学院上海原子核研究所辐射化学开放实验室上海201800

Photochemical reactions of 4-nitroquinoline 1-oxide(4NQO) with methionine-containing dipeptides Met-Met, Ala-Met, Met-Lue and Met-Gly have been studies by using 248 nm laser flash photolysis. The formation of α-alkyl radicals was observed, and their rate constants of formation were obtained. The reaction mechanism that the α-alkyl radicals produced via an electron transfer process between triplet 4NQO and methionine-containing dipeptide was proposed.

关键词： 4NQ 致癌机理电子转移甲硫氨酸二肽光化学

水溶液中1，3-二甲基尿嘧啶光[2＋2]环加成的区域与立体选择性

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中国科学技术大学学报 2008年第6期38卷 644-646页

作者：黑晓明刘百战宋钦华中国科学技术大学化学系安徽合肥230026 中国科学技术大学烟草分析中心合肥230026

以丙酮为光敏剂,研究了1,3二甲基尿嘧啶在水溶液中的光二聚作用.用1,3-二甲基尿嘧啶在溶液中辐照二聚生成四种环丁烷型二聚体,结果表明,这四种二聚体的比例与溶剂中丙酮的含量有关.最后对溶剂与这四种二聚体分布的关系作了相应的机理解释.

关键词： 1 ,3-二甲基尿嘧啶环丁烷型嘧啶二聚体光[2+2]环加成立体选择性区域选择性