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Biomaterials and Tissue Engineering Laboratory Fu Jen Catholic University. Liu HW Lab. 組織再生 Tissue Regeneration. 劉席瑋 Hsia-Wei Liu. 輔仁大學生命科學系助理教授 中研院物理所訪問學者 工研院材化所研究員 長庚醫院骨科博士後研究員 國立清華大學化工博士 / 醫學工程碩士. 全球生技產業概況 --- 全球醫療趨勢. 我國生技產業現況. 甚麼是再生醫學 ?. 甚麼是組織工程 ?. 構成個體的層次. 循環系統. 呼吸系統. 消化系統.
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Biomaterials and Tissue Engineering Laboratory Fu Jen Catholic University Liu HW Lab 組織再生Tissue Regeneration 劉席瑋 Hsia-Wei Liu 輔仁大學生命科學系助理教授 中研院物理所訪問學者 工研院材化所研究員 長庚醫院骨科博士後研究員 國立清華大學化工博士/醫學工程碩士
循環系統 呼吸系統 消化系統 泌尿系統 骨骼肌肉系統 免疫系統 神經系統 內分泌系統 生殖系統 皮膚系統
Why is it Important? • Birth Defects (genetic mutations)
Why is it Important? • Burn Victims
Why is it Important? • War Injuries
Why is it Important? • Sports Injuries
侏儸紀公園 When mosquito meets dinosaur
AMBER ? ? ?
A cell that has the ability to continuously divide and differentiate (develop) into various other kind(s) of cells/tissues 幹細胞(Stem Cell)
Stem cells are the base cells of the body. The different tissues form out of them – skin, muscles, bones, blood, nerve fibres, and all the organs.
明尼蘇達大學這批科學家由朵瑞絲泰勒博士(Dr. Doris Taylor)領軍,他們從捐贈者遺體取出心臟,在實驗室以界面活性劑洗去心臟細胞,取得有「鬼心」(ghost heart)之稱的膠原蛋白支架。再將取自需換心者的數百萬顆年輕幹細胞注入支架,假以時日,這群幹細胞會附著上支架、分裂至特定數量,心臟即能自主搏動。
組織工程基本原理Basic principles of tissue engineering Cells expansion Growth Factors Cells isolation Biomaterials 3-D Scaffold In vivo implantation In vitro culture
組織工程三要素 細胞 支架 生長因子
Scaffolds • Various textures and materials • Encourage cells to grow • Allow nutrients to permeate • Won’t harm the patient
Tissue Engineering • Generation of semi-synthetic tissues and organs • Biocompatible scaffolding materials • Synthetic polymer or natural material (e.g. collagen) • Living cells grown in culture • Fully differentiated cells • From simple tissues and organs (skin, cartilage, urinary bladders) to whole organs using stem cells
Metals Ceramics Polymers Semiconductor Materials Skin/cartilage Drug Delivery Devices Ocular implants Bone replacements Orthopedic screws/fixation Heart valves Synthetic BIOMATERIALS Dental Implants Dental Implants Biosensors Implantable Microelectrodes
Biomaterials cover all classes of materials – metals, ceramics, polymers
Uses of Ceramics • Structural components • Joint replacements, hip and knee • Spinal fusion devices • Dental crowns, bridges, implants, etc • Other applications • Inner ear and cochlear匙形implants • Tissue engineering • Coatings for heart valves
Engineering bone grafts • Change stem cells into bone cells • with proper growth factors in cell culture media • This scaffold can’t be too big or the cells inside will die since they will not get enough oxygen A 3D calcium phosphate scaffold From Becton Dickinson
Uses of Metals • Structural components • Joint replacements • Bone fracture pins, plates • Dental implants • Other applications • Leads, wires, tubing • Cardiac devices
Artificial Hip Joints http://www.totaljoints.info/Hip.jpg
Uses of Polymers • Many applications • Valves, ducts, catheters • Joint replacement • Coatings, encapsulants • Tissue engineering scaffolds • Lenses
Intraocular Lens 3 basic materials - PMMA, acrylic, silicone
Uses of Biological Materials • Scaffolds • Replacement tissues • Skin, cartilage, etc. • Coatings for synthetic polymeric or metallic materials • Plastic/cosmetic surgery
Artificial Vessels • Usually for by-pass operation http://popularmechanics.com/popmech/sci/tech/9805TUMDOM.html
A new bladder • To make a bladder one need a scaffold and several different type of cells