Summary

分離、伝達、およびプリオン蛋白質発現ひと歯髄幹細胞の神経分化

Published: March 18, 2019
doi:

Summary

ここでプリオン蛋白発現神経細胞の分化過程を評価するために人間の歯髄幹細胞の分離と伝搬するためのプロトコルを提案する.

Abstract

胚性幹細胞の操作に関連する生命倫理の問題は、医学研究の分野での進歩を妨げています。このため、脂肪、臍帯、骨髄血などさまざまな組織から成体幹細胞を得ることが非常に重要です。可能なソースの間で倫理的配慮に関して入手が容易だから、歯髄は特に興味深いです。確かに、ひと歯髄幹細胞 (hDPSCs) は成体幹細胞の神経様細胞に区別することの一種で、健康な患者 (13-19 歳) の第 3 大臼歯から取得することができます。特に、歯髄除去掘削機と、小さなスライスにカット、IV コラゲナーゼで処理し、フラスコで培養します。神経細胞の分化を誘導して、2 週間 hDPSCs EGF/bFGF と刺激を受けました。以前は、その分化過程プリオンの内容 hDPSCs の蛋白質 (PrPC) 増加を確認しました。Cytofluorimetric 分析は、神経細胞の分化プロセス後に増加した PrPCの早期発現を示した。SiRNA による prpCアブレーション PrP EGF/bfgf 投与による神経細胞の分化を防止しました。本稿で我々 は分離、分離およびいくつかの簡単な手順で hDPSCs 栽培体外を強化より効率的な細胞クローンされた間葉系幹細胞 (MSCs) の取得と大規模な拡大を説明します。観察されました。また、どのプロトコルでは、詳細な方法で得られた、hDPSCs、MSCs の神経分化過程とその後の細胞および分子プロセスを研究する優秀な実験モデルを示す.

Introduction

間葉系幹細胞は、骨髄、臍帯血、歯髄、脂肪組織、血液1,2,3,4,5など、いくつかの組織から分離されています。,6。 hDPSCs がプラスチック付着、典型的な線維芽細胞様形態を示す何人かの著者によって報告されるようです。これらは異なるクローン増殖と分化能力7,8の違いと非常に異種の人口を表しています。hDPSCs 間葉系幹細胞 (すなわち CD44、CD90、CD73, CD105、STRO 1) 特定のマーカーの表現、(CD14 CD19 など) いくつかの造血のマーカーは陰性、血液分化9ことができる10,11

何人かの著者は、これらの細胞は神経成長因子、bFGF、特定メディアとサプリメント7,12との組み合わせで EGF を添加し、異なるプロトコルを使用して神経細胞のような細胞に分化することが示されています。また、神経細胞の分化のプロセス中に多くのタンパク質が関与しているし、これらのうち、いくつかの論文を表示関連する役割と重要な発現細胞プリオンタンパク質 (PrPC)、胎児および成体幹細胞13,の両方14., 分子として銅代謝、アポトーシス、細胞内の異なる機能を実行できるを表し、耐酸化ストレス15,16,17 PrPC,18,19,20,21,22

私たち以前紙23、hDPSCs 神経分化過程における PrPCの役割を検討しました。実際には、hDPSCs エクスプレス早熟 PrPCと、神経細胞の分化後追加の増加を観察することが可能だった。他の著者は、幹細胞の神経分化過程における PrPCの可能な役割を仮定しました。確かに、PrPCはアストロ サイト、オリゴデンドロ サイト、ニューロンの24にヒト胚性幹細胞の分化をドライブします。本研究の目的は、神経細胞の分化の間に歯髄、その分化過程と PrPCの役割から幹細胞を得るための方法論を強調していた。

Protocol

研究で使用されている第三大臼歯 (13-19 歳) 薬剤またはアルコールの消費のない前の歴史、すべて禁煙と適切な口腔衛生の患者から摘出し.科学歯科で「サピエンツァ」ローマ大学の顎顔面の説明の日に患者または両親からインフォームド コンセントを得た。倫理的な考察、倫理委員会の承認に基づくインフォームド コンセントを得た。 1. 歯や歯髄の抽出 ?…

Representative Results

第 3 大臼歯から得られる歯髄から hDPSCs の分離と分離のプロシージャは、小さな変化が破滅的な結果を導くことができる複雑なプロセスです。本稿でのアーサー et al.プロトコルを使用してください。12いくつかの改善をします。プロシージャの代表的な方式を図 1に示します。 <p class="jove_content" fo:keep-together.within-page="1…

Discussion

この作品での分離と hDPSCs; 神経分化の方法論に着目さらに、このプロセスで PrPCの役割を評価しました。分離し、プロセス中に神経細胞のような細胞で重要なステップ hDPSCs を区別するいくつかの方法があります。hDPSCs は、軟骨細胞、脂肪細胞、骨芽細胞、神経細胞などいくつかの系統に区別することができます。私たちの論文では神経細胞の分化のメカニズムと PrPCの存在?…

Disclosures

The authors have nothing to disclose.

Acknowledgements

この作品は、「Fondazione Varrone」と Rieti 大学ハブ ヴィンチェンツォ ・ マッテイを”サビーナ大学」によって支持されました。

テイラー & フランシス ・株式会社から、図 5 (a, B) は出版社の許可を得て転載: 人間歯科パルプ由来幹細胞の神経分化の間に役割のプリオン蛋白質 EGFR multimolecular 複合体。Martellucci、s.、マンジャネッリ V. マッテイ V.プリオンSorice m ・ ピコリ L. Santilli F. Santacroce C.。2018 3 月 4日。テイラー ・ フランシス (株)

Materials

Amphotericin B solution Sigma-Aldrich A2942 It is use to supplement cell culture media, it is a polyene antifungal antibiotic from Streptomyce
Anti-B3tubulin Cell Signaling Technology  #4466 One of six B-tubulin isoform, it is expressed highly during fetal and postnatal development, remaining high in the peripheral nervous system
Anti-CD105  BD Biosciences 611314 Endoglin (CD105), a major glycoprotein of human vascular endothelium, is a type I integral membrane protein with a large extracellular region, a hydrophobic transmembrane region, and a short cytoplasmic tail
Anti-CD44 Millipore CBL154-20ul Positive cell markers antibodies directed against mesenchymal stem cells
Anti-CD73  Cell Signaling Technology  13160 CD73 is a 70 kDa glycosyl phosphatidylinositol-anchored, membrane-bound glycoprotein that catalyzes the hydrolysis of extracellular nucleoside monophosphates into bioactive nucleosides
Anti-CD90 Millipore CBL415-20ul Positive cell markers antibodies directed against mesenchymal stem cells
Anti-GAP43  Cell Signaling Technology  #8945 Is a nervous system specific, growth-associated protein in growth cones and areas of high plasticity
Anti-mouse PE  Abcam ab7003 Is an antibody used in in flow cytometry or FACS analysis
Anti-NFH  Cell Signaling Technology  #2836 Is an antibody that detects endogenous levels of total Neurofilament-H protein
Anti-PrP mAb EP1802Y  Abcam ab52604 Rabbit monoclonal [EP 1802Y] to Prion protein PrP
Anti-rabbit CY5  Abcam ab6564 Is an antibody used in in flow cytometry or FACS analysis
Anti-STRO 1 Millipore MAB4315-20ul Positive cell markers antibodies directed against mesenchymal stem cells
B27 Supp XF CTS Gibco by life technologies A14867-01 B-27  can be used to support induction of human neural stem cells (hNSCs) from pluripotent stem cells (PSCs), expansion of hNSCs, differentiation of hNSCs, and maintenance of mature differentiated neurons in culture
BD Accuri C6 flow cytometer  BD Biosciences AC6531180187 Flow cytometer equipped with a blue laser (488 nm) and a red laser (640 nm)
BD Accuri C6 Software  BD Biosciences Controls the BD Accuri C6 flow cytometer system in order to acquire data, generate statistics, and analyze results
bFGF PeproThec, DBA 100-18B basic Fibroblast Growth Factor 
Centrifuge CL30R Termo fisher Scientific 11210908 it is a device that is used for the separation of fluids,gas or liquid, based on density
CO2 Incubator 3541 Termo fisher Scientific 317527-185 it ensures optimal and reproducible growth conditions for cell cultures
Collagenase, type IV  Life Technologies 17104019 Collagenase is a protease that cleaves the bond between a neutral amino acid (X) and glycine in the sequence Pro-X-Glyc-Pro, which is found with high frequency in collagen
Disposable scalpel  Swann-Morton 501 It is use to cut tissues
DMEM-L Euroclone ECM0060L Dulbecco's Modified Eagle's Medium Low Glucose with L-Glutamine with Sodium Pyruvate
EGF PeproThec, DBA AF-100-15 Epidermal Growth Factor 
Fetal Bovine Serum Gibco by life technologies 10270-106 FBS is a popular media supplement because it provides a wide array of functions in cell culture. FBS delivers nutrients, growth and attachment factors and protects cells from oxidative damage and apoptosis by mechanisms that are difficult to reproduce in serum-free media (SFM) systems
Filtropur BT50 0.2,500ml Bottle top filter Sarstedt 831,823,101 it is a device that is used for filtration of solutions
Flexitube GeneSolution for PRNP Qiagen GS5621 4 siRNAs for Entrez gene 5621. Target sequence N.1 TAGAGATTTCATAGCTATTTA  N.2 CAGCAAATAACCATTGGTTAA  N.3. CTGAATCGTTTCATGTAAGAA  N.4  CAGTGACTATGAGGACCGTTA
Hank's solution 1x Gibco by life technologies 240200083 The essential function of Hanks′ Balanced Salt solution is to maintain pH as well as osmotic balance. It also provides water and essential inorganic ions to cells
HiPerFect Transfection Reagent  Qiagen 301705 HiPerFect Transfection Reagent is a unique blend of cationic and neutral lipids that enables effective siRNA uptake and efficient release of siRNA inside cells, resulting in high gene knockdown even when using low siRNA concentrations
Neurobasal A  Gibco by life technologies 10888022 Neurobasal-A Medium is a basal medium designed for long-term maintenance and maturation of pure post-natal and adult brain neurons 
Paraformaldehyde Sigma-Aldrich 30525-89-4 Paraformaldehyde has been used for fixing of cells and tissue sections during staining procedures
penicillin/streptomycin  Euroclone ECB3001D  It is use to supplement cell culture media to control bacterial contamination
Phosphate buffered saline  (PBS) Euroclone ECB4004LX10  PBS is a balanced salt solution used for the handling and culturing of mammalian cells. PBS is used to to irrigate, wash, and dilute mammalian cells. Phosphate buffering maintains the pH in the physiological range
TC-Platte 6 well, Cell+,F Sarstedt 833,920,300 It is a growth surface for adherent cells
Tissue culture flask T-25,Cell+,Vented Cap Sarstedt 833,910,302 Tissue culture flask T-25, polystyrene, Cell+ growth surface for sensitive adherent cells, e.g. primary cells, canted neck, ventilation cap, yellow, sterile, Pyrogen-free, non-cytotoxic, 10 pcs./bag
Triton X-100  Sigma-Aldrich 9002-93-1 Widely used non-ionic surfactant for recovery of membrane components under mild non-denaturing conditions
Trypsin-EDTA  Euroclone ECB3052D  Trypsin will cleave peptides on the C-terminal side of lysine and arginine amino acid residues. Trypsin is used to remove adherent cells from a culture surface
Tube Sarstedt 62,554,502 Tube 15ml, 120x17mm, PP
VBH 36 C2 Compact Steril ST-003009000 Offers totally protection for the enviroment and worker
ZEISS Axio Vert.A1 – Inverted Microscope Zeiss 3849000962 ZEISS Axio Vert.A1 provides a unique entry level price and can provide all contrasting techniques, including brightfield, phase contrast, PlasDIC, VAREL, improved Hoffman Modulation Contrast (iHMC), DIC and fluorescence. Incorporate LED illumination for gentle imaging for fluorescently-labeled cells. Axio Vert.A1 is ergonomically designed for routine work and compact enough to sit inside tissue culture hoods.

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Cite This Article
Martellucci, S., Santacroce, C., Manganelli, V., Santilli, F., Piccoli, L., Cassetta, M., Misasi, R., Sorice, M., Mattei, V. Isolation, Propagation, and Prion Protein Expression During Neuronal Differentiation of Human Dental Pulp Stem Cells. J. Vis. Exp. (145), e59282, doi:10.3791/59282 (2019).

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