Ichikawa H, Sugimoto T
Second Department of Oral Anatomy, Okayama University Dental School, Japan.
Arch Oral Biol. 1998 Feb;43(2):167-71. doi: 10.1016/s0003-9969(97)00099-x.
The lingual portion of the incisor periodontal ligament demonstrated activity for nicotinamide adenosine dinucleotide phosphate (NADPH)-diaphorase. Schwann cells surrounding Ruffini-like endings coexpressed NADPH-diaphorase activity and immunoreactivity for inducible nitric oxide synthase. NADPH-diaphorase-positive nerve fibres which coexpressed immunoreactivity for neuronal nitric oxide synthase were in contact with Schwann cells surrounding Ruffini-like endings or terminated as free nerve endings. Neural NADPH-diaphorase activity could not be found in the tissues covering the labial portion of incisor tooth root. It is possible that nitric oxide in Schwann cells and nerves has functions specific to the incisor periodontal ligament.
切牙牙周膜的舌侧部分显示出对烟酰胺腺嘌呤二核苷酸磷酸（NADPH）-黄递酶有活性。围绕类鲁菲尼终末的施万细胞共表达NADPH-黄递酶活性和诱导型一氧化氮合酶的免疫反应性。共表达神经元型一氧化氮合酶免疫反应性的NADPH-黄递酶阳性神经纤维与围绕类鲁菲尼终末的施万细胞接触或作为游离神经末梢终止。在覆盖切牙牙根唇侧部分的组织中未发现神经NADPH-黄递酶活性。施万细胞和神经中的一氧化氮可能具有切牙牙周膜特有的功能。
