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Related Experiment Videos

Informative morphogenetic and phenogenetic variants in children with cleft lip/cleft palate

L Pelz1, A Amling

  • 1Department of General Pediatrics, University Children's Hospital, Rostock, Germany.

American Journal of Medical Genetics
|May 3, 1996
PubMed
Summary

Informative morphogenetic variants (IMVs) and phenogenetic variants (PHVs) showed no significant differences between children with cleft lip/palate and healthy controls. This suggests clefts arise early in development, separate from these later variants.

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Area of Science:

  • Medical Genetics
  • Developmental Biology
  • Craniofacial Biology

Background:

  • Nonsyndromic cleft lip/cleft palate (NSCL/P) is a common birth defect.
  • The etiology of NSCL/P is complex, involving genetic and environmental factors.
  • Investigating morphogenetic and phenogenetic variants may offer insights into NSCL/P development.

Purpose of the Study:

  • To compare the prevalence of informative morphogenetic variants (IMVs) and phenogenetic variants (PHVs) in patients with NSCL/P and healthy controls.
  • To explore the developmental timing of NSCL/P in relation to IMVs and PHVs.
  • To identify potential contributing factors to morphological differences in NSCL/P patients.

Main Methods:

  • A case-control study involving 230 patients with NSCL/P and 226 healthy children.

Related Experiment Videos

  • Assessment of informative morphogenetic variants (IMVs) and phenogenetic variants (PHVs).
  • Anthropometric measurements and analysis of non-craniofacial phenogenetic variants.

    • Main Results:

    • No significant difference was found in the number of IMVs between the NSCL/P group and the control group (chi^2 = 5.89, df = 3, p > 0.70).
    • This finding supports the hypothesis that NSCL/P occurs during blastogenesis, while IMVs and PHVs reflect later embryonic and fetal development.
    • Contradictory anthropometric findings were observed, with significant differences in a few non-craniofacial phenogenetic variants between the groups.

    Conclusions:

    • The absence of differences in IMVs suggests that NSCL/P originates earlier in development than the processes forming these variants.
    • Intrinsic factors or secondary effects of the primary cleft defect may influence the fine-tuning of morphology in NSCL/P patients.
    • Further research is needed to elucidate the complex interplay of factors contributing to NSCL/P and associated phenotypic variations.