Neurokinin A-like immunoreactivity in feline dental pulp: its distribution,origin and coexistence with substance P-like immunoreactivity |
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Authors: | Dr. Satoshi Wakisaka Hiroyuki Ichikawa Shinji Nishikawa Saburou Matsuo Yoshiro Takano Michio Akai |
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Affiliation: | (1) First Department of Oral Anatomy, Osaka University Faculty of Dentistry, Suita City, Osaka, Japan;(2) First Department of Oral Anatomy, Osaka University Faculty of Dentistry, 1-8, Yamadaoka, 565 Suita, Osaka, Japan |
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Abstract: | Summary The distribution and origin of neurokinin A (NKA)-like immunoreactivity were investigated in feline dental pulp by an indirect immunofluorescence method. NKA-containing nerve fibres with varicosities, which entered the dental pulp via apical foramen, were distributed throughout this tissue. Many NKA-containing nerve fibres were localized around blood vessels, but some were observed apart therefrom. At the odontoblastic layer, thin NKA-containing nerve fibres were observed running straight toward the pulp-predentinal border between odontoblasts. After inferior alveolar nerve section, all NKA-containing nerve fibres disappeared in the dental pulp, while the removal of the superior cervial ganglion resulted in no change in the distribution of these fibres. The correlation of NKA-like immunoreactivity and substance P (SP)-like immunoreactivity was also investigated by double-immunofluorescence technique. The distribution of NKA-containing nerve fibres was very similar to that of SP-containing nerve fibres; it appeared that all NKA-containing nerve fibres contained SP. |
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Keywords: | Neurokinin A Substance P Dental pulp Immunohistochemistry Cat |
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