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iPSC Release Testing

Induced pluripotent stem cells (iPSCs) hold immense potential for regenerative medicine, cell therapy, and drug discovery, but ensuring their safety, identity, and potency is critical before clinical application. At Avance Biosciences, we provide comprehensive iPSC release testing services to meet stringent regulatory requirements.

Our Expertise

Our state-of-the-art analytical platforms support the characterization of iPSCs through genomic integrity assessment, sterility and mycoplasma testing, and pluripotency validation. With expertise in GMP-compliant testing, we help you confidently advance your iPSC-based therapies from research to clinical use.

Key iPSC Services

CQA

Assay

Description

Platform

Pluripotency Surface Marker Profiling

Confirm undifferentiated pluripotent stem cells by detecting SSEA-4⁺ and TRA-1-60⁺ expression with SSEA-1⁻ absence.

Flow Cytometry

Identity

Pluripotency Marker Gene Expression

Confirm undifferentiated stem cell identity by measuring TF expression of OCT4, SOX2, and NANOG.

qPCR

STR-Based Genetic Identity Profiling

Verify iPSC genetic identity by profiling highly polymorphic DNA regions using STR analysis.

Sanger

HLA Genotyping

Confirm sample identity by genotyping HLA loci for accurate verification.

NGS

Ectoderm Marker Expression

Confirm ectodermal differentiation potential by measuring SOX1, PAX6, and NESTIN, markers of neural specification.

qPCR

Potency

Mesoderm Marker Expression

Confirm mesodermal differentiation potential by measuring BRACHYURY, NKX2-5, and HAND1, mesoderm markers.

qPCR

Endoderm Marker Expression

Confirm endodermal differentiation potential by measuring SOX17, FOXA2, and CXCR4, endodermal markers.

qPCR

Residual Episomal Plasmid (EBNA1)

Quantify residual episomal plasmids with EBNA1; EBNA1 enables replication without integration and persistence.

ddPCR

Residual Episomal Plasmid (Ori)

Quantify residual episomal plasmids containing the Ori element, the binding site for EBNA1 that enables replication.

ddPCR/qPCR

Residual Reprogramming Vector (Custom)

Quantify residual custom episomal reprogramming vectors to ensure clearance from cells.

ddPCR

Residual Reprogramming Vector (Sendai)

Quantify residual Sendai viral RNA, a non-integrating vector delivering reprogramming factors during iPSC generation.

ddPCR

Purity

Residual Total Collagenase

Quantify residual total collagenase in cell preps and biologics by antibody detection of active/inactive enzyme.

ELISA

Residual Medium Components

Quantify residual custom medium components to ensure clearance from cell preparations.

ELISA (Custom)

Residual ROCK Inhibitor (Y-27632)

Quantify residual ROCK inhibitor Y-27632 in cell preparations to ensure clearance from final products.

LC-MS

Residual Trypsin Activity

Quantify residual trypsin activity in cell preparations using the BAPNA colorimetric assay.

Colorimetric

Lineage Marker Exclusion

Confirm undifferentiated stem cell state by detecting the absence of lineage-specific differentiation markers.

qPCR

WGS Variant Detection

Detect genomic variants in coding and non-coding regions: structural, copy number, single-nucleotide.

NGS

WES Variant Detection

Detect cancer- and disease-associated variants in coding regions.

NGS

Bovine-Origin Adventitious Viruses

Detect bovine-origin adventitious viruses to identify potential contaminants in biologics or cell substrates.

qPCR (Panel)

Human-Tropic Adventitious Viruses

Detect human-tropic adventitious viruses via cytopathic effects and replication in permissive MRC-5 cells.

Cell Culture

Broad-Spectrum Adventitious Viruses

Detect broad-spectrum adventitious viruses via cytopathic effects and replication in permissive Vero cells.

Cell Culture

Avian/Broad-Spectrum Adventitious Viruses

Detect avian and broad-spectrum adventitious viruses via cytopathic effects and replication in permissive CEF cells.

Cell Culture

Human-Origin Adventitious Viruses

Detect human-origin adventitious viruses derived from human sources in biologics or cell substrates.

qPCR (Panel)

Safety

Porcine-Origin Adventitious Viruses

Detect porcine-origin adventitious viruses derived from porcine sources in biologics or cell substrates.

NGS (Panel)

Genetic Integrity Screening

Screen genetic integrity with the Illumina TruSight Inherited Disease Panel, detecting variants in genes linked to disease.

NGS (Panel)

Residual Active Collagenase

Quantify residual active collagenase in cell preps or biologics using the substrate-cleavage–dependent EnzChek™ assay.

Fluorometric

Residual DMSO

Quantify residual DMSO in cell preps with the Purpald® assay, detecting aldehyde formation followed by colorimetric rxn.

Colorimetric

Telomere Length Analysis

Quantify telomere length by calculating the T/S ratio (telomere repeat copy number to single-copy gene).

qPCR

Endotoxin Testing

Endotoxin testing per USP <85>

LAL Assay

Mycoplasma Testing

Mycoplasma detection per USP <63>

PCR/Micro

Sterility Testing

Standard sterility testing per USP <71>

Micro

Alkaline Phosphatase Staining

Confirm stem cell identity by detecting alkaline phosphatase activity inherent to undifferentiated stem cells.

Colorimetric

Other

Trypan Blue Viability Assay

Viability measurement using Trypan Blue: penetrates compromised membranes of non-viable cells.

Microscopy

7-AAD Viability Assay

Confirm cell viability by detecting 7-AAD penetration into non-viable cells with intact viable cells remaining unstained.

Flow Cytometry

Have Questions?

We are dedicated to timely, high-quality service from the start of your project to the finish. Send us a quick message with your questions to find out what Avance can do for you.

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