Stereomicroangiography in embryologic and teratologic investigation

Teratology
E L EffmannT Pexieder

Abstract

Vascular dysmorphogenesis is usually investigated by invasive microdissection or time-consuming reconstruction of serial sections. Stereomicroangiography (SMA) was used for detection and analysis of vascular abnormalities in a murine trisomy 13 model demonstrating pulmonary atresia. Twenty-two litters from doubly heterozygous Robertsonian translocation Rb(6.13)3Rma/Rb(5.13)70Lub male matings to NMRI females were studied. Embryos (13-17 days gestation) were prepared by umbilical vein perfusion with buffered fixative and umbilical artery perfusion with 5% AgNO3. After immersion fixation specimens were infiltrated with paraffin, mounted on stubs, and stereoradiographed at multiple angles. Transverse serial sections were prepared of the thoracic area. Thoracic vascular morphology was satisfactorily imaged and trisomy 13 embryos were correctly distinguished from normals in 105 of 120 embryos (87.5%). When independent SMA and histologic interpretations were compared anomalous vasculature was correctly identified in all 27 trisomic embryos and one control, and falsely interpreted in one normal embryo. Normal vascular morphology was demonstrated in the remaining 76 normal embryos. Separate SEM evaluation of five microdissected hearts f...Continue Reading

References

Oct 1, 1975·Genetical Research·G Hammerberg, J Klein
Nov 1, 1974·Journal of Microscopy·R K Dollinger, P B Armstrong
Jul 1, 1959·The American Journal of Anatomy·D B MOFFAT

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Citations

Mar 1, 1992·Journal of Magnetic Resonance Imaging : JMRI·B R SmithG A Johnson
Aug 1, 1994·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·A F MellinG A Johnson
Nov 1, 1991·International Journal of Cardiology·M VuilleminH Winking
Jul 1, 1988·Teratology·E L EffmannG Cofer

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