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  • Podsumowanie
  • Streszczenie
  • Wprowadzenie
  • Protokół
  • Wyniki
  • Dyskusje
  • Ujawnienia
  • Podziękowania
  • Materiały
  • Odniesienia
  • Przedruki i uprawnienia

Podsumowanie

The present protocol describes a method to isolate, expand, and reprogram human and non-human primate urine-derived cells to induced pluripotent stem cells (iPSCs), as well as instructions for feeder-free maintenance of the newly generated iPSCs.

Streszczenie

Cross-species approaches studying primate pluripotent stem cells and their derivatives are crucial to better understand the molecular and cellular mechanisms of disease, development, and evolution. To make primate induced pluripotent stem cells (iPSCs) more accessible, this paper presents a non-invasive method to generate human and non-human primate iPSCs from urine-derived cells, and their maintenance using a feeder-free culturing method.

The urine can be sampled from a non-sterile environment (e.g., the cage of the animal) and treated with a broad-spectrum antibiotic cocktail during primary cell culture to reduce contamination efficiently. After propagation of the urine-derived cells, iPSCs are generated by a modified transduction method of a commercially available Sendai virus vector system. First iPSC colonies may already be visible after 5 days, and can be picked after 10 days at the earliest. Routine clump passaging with enzyme-free dissociation buffer supports pluripotency of the generated iPSCs for more than 50 passages.

Wprowadzenie

Genomic comparisons of human and non-human primates (NHPs) are crucial to understand our evolutionary history and the evolution of human-specific traits1. Additionally, these comparisons allow for the inference of function by identifying conserved DNA sequences2, e.g., to prioritize disease-associated variants3. Comparisons of molecular phenotypes such as gene expression levels are crucial to better interpret genomic comparisons and to discover, for example, cellular phenotypic differences. Furthermore, they have - similar to comparisons at the DNA level - the potential to infer functional relevan....

Protokół

This experimental procedure was approved by the responsible ethic committee on human experimentation (20-122, Ethikkommission LMU München). All experiments were performed in accordance with relevant guidelines and regulations.
NOTE: Approval must be obtained from the appropriate ethical committee before starting experiments dealing with human and NHP samples. All experimental procedures must be performed in accordance with relevant guidelines and regulations. Each of the following steps should be performed using sterile technique in a biological safety cabinet. All buffer and media compositions can be found in Supplementary Table S1. Ensure....

Wyniki

When isolating cells from human and NHP urine, different types of cells can be identified directly after isolation. Squamous cells, as well as various smaller round cells, get excreted with the urine; female urine contains far more squamous cells than male urine (Figure 1B - Day 0; Supplementary Figure S1). After 5 days of culture in primary urine medium, the first adherent proliferating cells can be seen (Figure 1A,B - Day.......

Dyskusje

iPSCs are valuable cell types as they allow the generation of otherwise inaccessible cell types in vitro. As the starting materials for reprogramming, for example, fibroblasts are not easily available from all primate species, this paper presents a protocol for the generation of iPSCs from urine-derived cells. These cells can be obtained in a non-invasive manner, even from non-sterile primate urine samples, by supplementing the culture medium with broad-spectrum antibiotics.

Several c.......

Ujawnienia

The authors have no conflicts of interest to disclose.

Podziękowania

This work was supported by DFG EN 1093/5-1 (project number 458247426). M.O. was supported by JSPS Overseas Research Fellowship. All figures were created with BioRender.com. Flow cytometry was performed with the help of the Core Facility Flow Cytometry at Biomedical Center Munich. We would like to thank Makoto Shida and Tomoyo Muto from ASHBi, Kyoto University, for support of videography.

....

Materiały

NameCompanyCatalog NumberComments
Accumax™ cell detachment solution (Detachment solution)Sigma-AldrichSCR006
Amphotericin B-SolutionMerckA2941-100ML
Anti-Human TRA-1-60 Mouse Antibody Stem Cell Technologies60064Dilution: 1/200
Anti-Human TRA-1-60 PE-conjugated Antibody Miltenyi Biotec130-122-965Dilution: 1/50
Bambanker™ (Cell freezing medium)Nippon GeneticsBB01
Bovine Serum Albumin (BSA)Sigma-AldrichA3059-100G
Cell culture multiwell plate, 12-well CELLSTARGreiner BIO-ONE665180
Countess™ II automated cell counterThermo Fisher ScientificAMQAX1000
CryoKing® 1.5 mL Tubes with 2D Barcode (Cryotubes)Sued-Laborbedarf52 95-0213Different types of Cryotubes can be used for freezing. The 2D barcode tubes have the advantage that the sample info can be stored in a database with unique tube information.
CytoTune™ EmGFP Sendai Fluorencence Reporter (GFP Sendai virus)Thermo Fisher ScientificA16519
CytoTune™-iPS 2.0 Sendai Reprogramming Kit (Sendai virus reprogramming kit)Thermo Fisher ScientificA16518
DAPI 4',6-Diamidine-2'-phenylindole dihydrochlorideSigma-Aldrich10236276001
DMEM High GlucoseTH.GeyerL0102
DMEM/F12 w L-glutamineFisher Scientific15373541
Donkey anti-Mouse IgG (H+L) Highly Cross-Adsorbed Secondary Antibody, Alexa Fluor™ 488Thermo Fisher ScientificA-21202Dilution: 1/500
Donkey anti-Rabbit IgG (H+L) Highly Cross-Adsorbed Secondary Antibody, Alexa Fluor™ 594Thermo Fisher ScientificA-21207Dilution: 1/500
DPBS w/o Calcium w/o MagnesiumTH.GeyerL0615-500
EpCAM Recombinant Polyclonal Rabbit Antibody (22 HCLC)Thermo Fisher Scientific710524Dilution: 1/500
Ethylenediamine tetraacetic acid (EDTA)Carl RothCN06.3
Falcon Tube 15 mL conical bottomGreiner BIO-ONE188271-N
Falcon Tube 50 mL conical bottomGreiner BIO-ONE227261
Fetal Bovine Serum, qualified, heat inactivated, Brazil (FBS)Thermo Fisher Scientific10500064
FlowJo V10.8.2FlowJo 663441
Gelatin from porcine skinSigma-AldrichG1890-1KG
Geltrex™ LDEV-Free, hESC-Qualified, Reduced Growth Factor Basement Membrane MatrixThermo Fisher ScientificA1413301
GlutaMAX™ SupplementThermo Fisher Scientific35050038
Heracell™ 240i CO2 incubatorFisher Scientific16416639
Heraeus HeraSafe safety cabinetKendro51017905
Human EGF, premium gradeMiltenyi Biotec130-097-749
ImageJ FijiVersion 2.9.0
MEM Non-Essential Amino Acids Solution (100X)Thermo Fisher Scientific11140035
Microcentrifugation tube PP, 1.5 mLNerbe Plus04-212-1000
Microscope Nikon eclipse TE2000-SNikonTE2000-S
Mouse anti-alpha-Fetoprotein antibodyR&D SystemsMAB1368Dilution: 1/100
Mouse anti-alpha-Smooth Muscle Actin antibodyR&D SystemsMAB1420Dilution: 1/100
Mouse anti-beta-III Tubulin antibodyR&D SystemsMAB1195Dilution: 1/100
mTeSR™ 1STEMCELL Technolgies85850
Nanog (D73G4) XP Rabbit mAb Cell Signaling Technology4903SDilution: 1/400
Normocure™ (Antimicrobial Reagent)Invivogenant-noc
Oct-4 Rabbit Antibody Cell Signaling Technology2750SDilution: 1/400
Paraformaldehyde (PFA)Sigma-Aldrich441244-1KG
Penicillin-Streptomycin (10.000 U/ml) (PS)Thermo Fisher Scientific15140122Penicillin-Streptomycin mix contains 100 U/mL Penicillin and 100 µg/mL Streptomycin.
Recombinant Human FGF-basicPeproTech100-18B
Recombinant Human PDGF-ABPeproTech100-00AB
Refrigerated benchtop centrifugeSIGMA 4-16KS
Renal Epithelial Cell Basal MediumATCCPCS-400-030
Renal Epithelial Cell Growth KitATCCPCS-400-040
Sox2 (L1D6A2) Mouse mAb #4900Cell Signaling Technology4900SDilution: 1/400
SSEA4 (MC813) Mouse mAbNEB4755SDilution: 1/500
StemFit® Basic02Nippon Genetics3821.00The production of this medium was discontinued, use StemFit Basic04CT for human cell lines or StemFit Basic03 for non-human primates instead.
Triton X-100 Sigma-AldrichT8787-50ML
TrypLE™ Select Enzyme (1x), no phenol red (Dissociation enzyme)Thermo Fisher Scientific12563011
Waterbath Precision GP 05Thermo Fisher ScientificTSGP05
Y-27632, Dihydrochloride Salt (Rock Inhibitor)BiozolBYT-ORB153635
Antibody dilution bufferFor composition see the supplementary table S1
Blocking bufferFor composition see the supplementary table S1
REMC mediumFor composition see the supplementary table S1
Primary urine mediumFor composition see the supplementary table S1
PSC culture mediumFor composition see the supplementary table S1
PSC generation mediumFor composition see the supplementary table S1
Urine wash bufferFor composition see the supplementary table S1

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PrimateInduced Pluripotent Stem CellsUrinary CellsNon invasiveSendai VirusReprogrammingBasement Membrane MatrixREMC MediumCentrifugationCell Culture

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