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Effects of post-natal serotonin levels on craniofacial complex

K E Byrd1, T A Sheskin

  • 1Department of Anatomy & Cell Biology, Indiana University School of Medicine, Indianapolis 46202-5120, USA. kbyrd@iupui.edu

Journal of Dental Research
|October 24, 2001
PubMed

Insights

Altering serotonin levels near trigeminal motoneurons significantly impacts post-natal craniofacial development in rats. This study reveals serotonin

Area of Science:

  • Neuroscience
  • Developmental Biology
  • Craniofacial Biology

Background:

  • Serotonin (5-hydroxytryptamine or 5-HT) is known to influence prenatal craniofacial development.
  • The impact of serotonin on post-natal craniofacial growth remains largely unexplored.

Purpose of the Study:

  • To investigate the effects of elevated serotonin levels adjacent to trigeminal motoneurons on post-natal craniofacial structures in young rats.
  • To determine if localized serotonin modulation can alter craniofacial development after birth.

Main Methods:

  • Forty male Sprague-Dawley rats were divided into four groups: 10% serotonin microspheres, 15% serotonin microspheres, blank microspheres, and sham surgeries.
  • Stereotactic neurosurgery was performed at post-natal day 35.
  • Animals were analyzed at 14 and 21 days post-surgery, measuring muscle weight, cranial dimensions, and temporomandibular joint (TMJ) dimensions.

Main Results:

  • Significant differences were observed between experimental groups and sides for muscle weight, cranial dimensions, and TMJ dimensions.
  • Increased serotonin levels adjacent to trigeminal motoneurons led to notable alterations in craniofacial structures.
  • Statistical analysis confirmed the significance of these findings (P < 0.05, 0.01).

Conclusions:

  • Altered in vivo serotonin levels near trigeminal motoneurons can significantly modify post-natal craniofacial structures.
  • This research highlights a novel role for serotonin in regulating craniofacial development during the post-natal period.
  • Findings suggest serotonin as a potential factor influencing craniofacial plasticity and growth postnatally.

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