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Journal of Zhejiang University SCIENCE B

ISSN 1673-1581(Print), 1862-1783(Online), Monthly

Early senescence of pancreatic β cells induced by unfolded protein response deficiency prevents type 1 diabetes

Abstract: Type 1 diabetes (T1D) is a T lymphocyte-mediated autoimmune disease caused by pancreatic β‍-cell destruction, which eventually leads to reduced insulin level and increased blood glucose level (Syed, 2022). As a multifactorial disease, T1D is characterized by a genetic predisposition associated with various environmental and cellular elements (Syed, 2022). Pancreatic β cells have long been considered the “innocent victims” in T1D pathogenesis since the pancreas is attacked by the immune cells, resulting in a process known as insulitis, in which the immune cells infiltrate pancreatic islets and secrete pro-inflammatory cytokines. However, growing evidence suggests that various β‍-cell stresses, dysfunction, and death contribute to T1D pathogenesis, as it has been observed that β‍-cell dysfunction in autoantibody-positive (Aab+) individuals exists long before T1D diagnosis (Evans-Molina et al., 2018).

Key words: Type 1 diabetes (T1D); Senescence; Unfolded protein response (UPR); Pancreatic β cells

Chinese Summary  <35> æ—©æœŸé“床多场时å˜è¡Œä¸ºåŠå¼€è£‚机ç†ç ”ç©¶

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机构:1西å—交通大学,高速é“路线路工程教育部é‡ç‚¹å®žéªŒå®¤ï¼Œä¸­å›½æˆéƒ½ï¼Œ610031ï¼›2中国五冶集团有é™å…¬å¸ï¼Œä¸­å›½æˆéƒ½ï¼Œ610063
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创新点:1.建立更完善的早期é“床开裂风险预测模型,且模型å‡è®¾æ¡ä»¶æ›´å°‘,准确性更高,适用场景更全é¢ï¼›2.系统分æžé“åºŠæ—©æœŸå¤šåœºè€¦åˆæ—¶å˜è§„律和开裂机ç†ï¼›3.æ­ç¤ºææ–™ã€çŽ¯å¢ƒä»¥åŠæ–½å·¥ä¸‰ç±»å› ç´ å¯¹æ··å‡åœŸé“床早期开裂风险的影å“规律,并æå‡ºäº†é“床早期开裂控制措施。
方法:1.通过ç†è®ºæŽ¨å¯¼ï¼Œç»Ÿä¸€æ··å‡åœŸæ—©æœŸåˆ°æˆåž‹å…¨è¿‡ç¨‹çš„æ°´åŒ–-热-湿-力耦åˆå¤šåœºæŽ§åˆ¶æ–¹ç¨‹ï¼Œå¹¶å»ºç«‹æ—©æœŸé“床开裂风险预测模型;2.通过数值模拟,得到é“åºŠæ—©æœŸå¤šåœºè€¦åˆæ—¶å˜è§„律和开裂机ç†ï¼Œå¹¶æ­ç¤ºä¸åŒå› ç´ å¯¹æ··å‡åœŸé“床早期开裂风险的影å“规律。
结论:1.在典型工况æ¡ä»¶ä¸‹ï¼Œåœ¨æ°´åŒ–场方é¢ï¼Œé“床最大水化速率出现在浇筑åŽçº¦7.0 hï¼›é“床终å‡ç‚¹åœ¨æµ‡ç­‘åŽçº¦9.5 hï¼›é“床水化在第7 d的水化进程å¯è¾¾æœ€ç»ˆæ°´åŒ–度的90%。在温度场方é¢ï¼Œå¯¹æµæ¢çƒ­å’Œå¤ªé˜³è¾å°„是影å“é“床早期温度场的主è¦çŽ¯å¢ƒå› ç´ ï¼›é“床表层最高温度浇筑åŽçº¦16.0 h达到最大值,比入模温度高约15.0 °C。在湿度场方é¢ï¼Œæ—©æœŸé“床内åŒå—å¼è½¨æž•附件存在局部ä¸å‡åŒ€æ¹¿åº¦åŒºåŸŸã€‚在力场方é¢ï¼Œçº¦åœ¨ç¬¬1.25 dï¼Œè½¨æž•å››å‘¨æ–°è€æ··å‡åœŸç»“åˆé¢å¼€è£‚的风险系数已超过1.00;在第7 d,轨枕附近é“床八字形裂纹的开裂风险达到最大,风险系数约为0.75。2.温度å˜å½¢æ˜¯é“床表层开裂的主导因素,也是é“床æ¿åº•开裂的主è¦é©±åŠ¨åŠ›ï¼›å¦‚æžœä¸è€ƒè™‘é“床混å‡åœŸæ—©æœŸå¾å˜ï¼Œä¼šå¤§å¹…度高估开裂风险,因此建模时应当考虑å¾å˜çš„å½±å“。3.ç»¼åˆæ€§çš„æ—©æœŸé“床开裂风险控制措施方é¢ï¼Œå»ºè®®æŒ‰ç…§ä¼˜å…ˆçº§é™ä½Žçš„顺åºï¼ˆæ°´åŒ–çƒ­â†’ä¼˜åŒ–æ”¾çƒ­å³°å€¼æ—¶åˆ»â†’å¢žå¼ºä¿æ¸©æŽªæ–½â†’选择åˆç†æµ‡ç­‘时刻→控制入模温度),进行早期é“床混å‡åœŸå¼€è£‚控制。

关键è¯ç»„:无砟轨é“;早期混å‡åœŸï¼›æ°´åŒ–-热-湿-力耦åˆï¼›é“床早期开裂


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DOI:

10.1631/jzus.B2400013

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On-line Access:

2024-08-27

Received:

2023-10-17

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2024-05-08

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2024-09-23

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