Nicotine Delays Bone Growth
Author Information
Author(s): Kawakita Atsuo, Sato Kazuki, Makino Hatsune, Ikegami Hiroyasu, Takayama Shinichiro, Toyama Yoshiaki, Umezawa Akihiro
Primary Institution: National Institute for Child Health and Development, Tokyo, Japan
Hypothesis
Nicotine affects growth plate chondrocytes directly and specifically through nAChR to delay skeletal growth.
Conclusion
Nicotine acts directly on growth plate chondrocytes to decrease matrix synthesis and suppress hypertrophic differentiation, leading to delayed skeletal growth.
Supporting Evidence
- Nicotine inhibited matrix synthesis and hypertrophic differentiation in human growth plate chondrocytes.
- Maternal nicotine exposure resulted in delayed skeletal growth of alpha7 nAChR +/+ fetuses.
- The effect of nicotine on chondrocytes was reversed by MLA, a specific antagonist of alpha7 nAChR.
Takeaway
Nicotine from smoking can slow down how bones grow in children by affecting special cells that help bones grow.
Methodology
The study investigated the effect of nicotine on human growth plate chondrocytes derived from extra human fingers, using both in vitro and in vivo experiments.
Limitations
The study primarily used chondrocytes from human fingers, which may not fully represent all growth plate chondrocytes.
Participant Demographics
Chondrocytes were derived from extra human fingers of patients with polydactyly.
Statistical Information
P-Value
p<0.02
Statistical Significance
p<0.02
Digital Object Identifier (DOI)
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