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A delay differential equation model for metabolic feedback among glucose, insulin and glucagon, and some thoughts on dual pump artificial pancreas

時(shí)間:2024-06-26 來(lái)源: 作者: 攝影: 編輯:張恩斯

報(bào)告人:李嘉旭教授

報(bào)告人單位:美國(guó)路易維爾大學(xué)

報(bào)告時(shí)間:2024年6月27日(星期四)9:00

報(bào)告地點(diǎn):篤行樓316-1

舉辦單位:數(shù)理科學(xué)學(xué)院

報(bào)告人簡(jiǎn)介

李嘉旭,博士,美國(guó)路易維爾大學(xué)教授。1996年獲美國(guó)亞利桑那州立大學(xué)計(jì)算機(jī)科學(xué)碩士學(xué)位,2004年獲美國(guó)亞利桑那州立大學(xué)數(shù)學(xué)博士學(xué)位。自2007年8月起在美國(guó)路易維爾大學(xué)數(shù)學(xué)系任助理教授,副教授,教授。主要從事于動(dòng)力系統(tǒng),泛函微分方程,數(shù)學(xué)生物學(xué)的研究,特別集中于基因轉(zhuǎn)化,代謝系統(tǒng)及糖尿病的研究,任Frontier Systems Biology和Mathematical Bioscience and Engineering等雜志編委。在主要專(zhuān)業(yè)雜志如SIAM Journal on Applied Mathematics、Journal of Theoretical Biology、Journal of Mathematical Biology等發(fā)表多篇有影響力的論文,主持和參與多個(gè)美國(guó)衛(wèi)生研究院、能源部項(xiàng)目以及子項(xiàng)目。他的研究成果大多處于國(guó)際領(lǐng)先水平,被多個(gè)生物學(xué)家、控制專(zhuān)家所應(yīng)用。此外,在2007年回歸學(xué)術(shù)界之前,李教授曾在美國(guó)高科技工業(yè)領(lǐng)域工作十余年,歷任程序員、工程師、高級(jí)工程師、資深高級(jí)工程師等,主要從事數(shù)據(jù)庫(kù),控制軟件的研發(fā)工作。

報(bào)告摘要

Glucose, insulin, and glucagon together form a complete endocrine metabolic feedbackloop. Most existing modeling work pertaining to this loop focuses mainly on the regulationsbetween glucose and insulin. The role of glucagon in these works is summarized by hepaticglucose production (HGP) dependent solely on insulin levels. In this talk, we carefully analyzethe secretion of glucagon, its role in HGP, and its interactions with insulin, and then formulatea dynamical system model to further analyze its effects in balancing blood sugar levels. Thepresence of glucagon allows us to examinethe impacts of HGP governed by insulin andglucagon separately. This reveals insight about how a very recent concept, glucagon resistance,can affect blood glucose levels and lead to rampant glucagon production and consequentlyblood sugar levels. We also show that a form of insulin resistance in hepatic cells can leadto excess insulin secretion, a characteristic of type 2 diabetes mellitus. We also present somethoughts on modeling the feedback loop in a dual pump artificial pancreas.

審核人:蔡亞峰

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