New research, published in the journal BMC Immunology, shows that odontoblast cells are part of the immune system and fight to protect teeth from decay, providing possible targets to control irreversible inflammatory damage to teeth.
It is known that teeth can protect themselves, to some extent, from attack by bacteria, but that inflammation within a tooth can be damaging and, in extreme cases, lead to abscess or death of the tooth.
Odontoblast cells, located inside the tooth, lie between the enamel and pulp and produce a layer of dentin to protect the pulp from wear and infection. This research shows that, when under attack from bacteria, the odontoblast cells also orchestrate an immune response, producing antimicrobial peptides (defensins) to fight the infection directly, protein messengers (chemokines) which recruit white blood cells to the site of infection, and pro-inflammatory signaling proteins (IL-1ß, IL-1α, and TNF-α) which, in turn, initiate an inflammatory response.
Orapin Horst, DDS, the study’s lead investigator, also found that the odontoblast layer produced proteins involved in the down-regulation of this inflammatory response, such as toll-interacting protein (TOLLIP), TGF-ß, and IL-10, which help protect the underlying pulp from inflammatory damage.
