Related Experiment Video
Updated: Jun 12, 2026
05:45
Developmental Toxicity Assay Based on Real-Time Monitoring of Fibroblast Growth Factor Signal Disruption in Human Induced Pluripotent Stem Cells
Published on: October 10, 2025
Comparing three novel endpoints for developmental osteotoxicity in the embryonic stem cell test.
Nicole I zur Nieden1, Lesley A Davis, Derrick E Rancourt
1Institute of Maternal and Child Health, University of Calgary, Calgary, AB T2N4N1, Canada. nicole.zurnieden@ucr.edu
Toxicology and Applied Pharmacology
|June 26, 2010
Summary
New embryonic stem cell test (EST) endpoints reliably detect developmental osteotoxicity. IMAGE analysis and calcium deposition assays offer inexpensive, efficient alternatives for assessing chemical safety and preventing birth defects.
Area of Science:
- Toxicology
- Developmental Biology
- Biochemistry
Background:
- Birth defects are serious pharmaceutical and environmental chemical side effects.
- Teratogens often impact bone development, causing malformations.
- In vitro embryotoxicity prediction models are crucial for safety assessments.
Purpose of the Study:
- To introduce and validate novel, cost-effective endpoints for assessing developmental osteotoxicity in vitro.
- To compare new endpoints with established markers like osteocalcin mRNA expression.
- To provide reliable alternatives for routine industrial compound screening.
Main Methods:
- Utilized the embryonic stem cell test (EST) model.
- Introduced three novel endpoints: morphometric calcium analysis, calcium level measurement, and alkaline phosphatase activity.
- Validated endpoints using model compounds: penicillin G, 5-fluorouracil, and all-trans retinoic acid.
- Compared results with osteocalcin mRNA expression.
Main Results:
- IMAGE analysis and calcium deposition assays proved to be reliable endpoints for detecting developmental osteotoxicity.
- These novel methods showed comparable results to osteocalcin expression.
- The new endpoints are cost-effective and efficient for routine screening.
Conclusions:
- IMAGE analysis and calcium deposition assays are validated as reliable endpoints for the EST.
- These methods offer a cost-effective and time-saving alternative to current molecular read-out methods.
- The findings support improved industrial assessment of novel compounds for developmental toxicity.
