5 results on '"Daisuke Tachiya"'
Search Results
2. Innervation of the human minor salivary glands; immunohistochemical study for neurochemical substances
- Author
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Ayumi, Sato, Takehiro, Yajima, Daisuke, Tachiya, Hiroyuki, Ichikawa, and Tadasu, Sato
- Subjects
Tyrosine 3-Monooxygenase ,Neuropeptides ,Humans ,Neuropeptide Y ,Dopamine beta-Hydroxylase ,Cell Biology ,General Medicine ,Salivary Glands, Minor ,Immunohistochemistry ,Vasoactive Intestinal Peptide ,Developmental Biology - Abstract
Distributions of choline acetyltransferase (ChAT), vasoactive intestinal polypeptide (VIP), dopamine β-hydroxylase (DBH), tyrosine hydroxylase (TH), neuropeptide Y (NPY) and the transient receptor potential cation channel subfamily V member 2 (TRPV2) were examined in the human minor salivary glands. ChAT-, VIP- and DBH-immunoreactive (-IR) nerve fibers were detected within nerve bundles and close to blood vessels and ducts in the salivary glands. Periacinar nerve fibers were commonly immunoreactive for ChAT in the Ebner's gland but infrequently in other salivary glands. Periacinar VIP-IR nerve fibers were numerous in the palatal gland, moderate in the lingual gland and relatively rare in the labial and Ebner's glands. Some TH-, NPY- and TRPV2-IR nerve fibers were also present around blood vessels and glandular acini in the palatal, lingual and Ebner's glands. Neuronal cells in the vicinity of Ebner's and lingual glands were immunoreactive for ChAT, VIP, TH and TRPV2. By confocal laser scanning microscopy, VIP- and ChAT-IR varicosities were located in the vicinity of myoepithelial and acinar cells in the minor salivary glands. The human minor salivary glands are probably innervated by parasympathetic and sympathetic nerves. Neurotransmitters including neuropeptides in these nerves are thought to be correlated to vasodilation and/or salivary secretion. Acetylcholine and VIP may regulate secretion of the saliva and its components in the salivary glands.
- Published
- 2022
3. Parasympathetic neurons in the human submandibular ganglion
- Author
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Hiroyuki Ichikawa, Souichi Kokubun, Mutsuko Kawashima, Daisuke Tachiya, Tadasu Sato, and Takehiro Yajima
- Subjects
0301 basic medicine ,medicine.medical_specialty ,Submandibular Gland ,Vasoactive intestinal peptide ,TRPV Cation Channels ,Nerve fiber ,Dopamine beta-Hydroxylase ,Biology ,03 medical and health sciences ,0302 clinical medicine ,stomatognathic system ,Internal medicine ,medicine ,Humans ,Premovement neuronal activity ,Neurons ,Myoepithelial cell ,Ganglia, Parasympathetic ,Cell Biology ,General Medicine ,Submandibular ganglion ,Neuropeptide Y receptor ,Immunohistochemistry ,Choline acetyltransferase ,Submandibular gland ,030104 developmental biology ,medicine.anatomical_structure ,Endocrinology ,nervous system ,030217 neurology & neurosurgery ,Vasoactive Intestinal Peptide ,Developmental Biology - Abstract
The submandibular ganglion (SMG) contains parasympathetic neurons which innervate the submandibular gland. In this study, immunohistochemistry for vasoactive intestinal polypeptide (VIP), neuropeptide Y (NPY), choline acetyltransferase (ChAT), dopamine β-hydroxylase (DBH), tyrosine hydroxylase (TH), and the transient receptor potential cation channel subfamily V members 1 (TRPV1) and 2 (TRPV2) was performed on the human SMG. In the SMG, 17.5 % and 8.9 % of parasympathetic neurons were immunoreactive for VIP and TRPV2, respectively. SMG neurons mostly contained ChAT- and DBH-immunoreactivity. In addition, subpopulations of SMG neurons were surrounded by VIP (69.6 %)-, TRPV2 (54.4 %)- and DBH (9.5 %)-immunoreactive (-ir) nerve fibers. SMG neurons with pericellular VIP- and TRPV2-ir nerve fibers were significantly larger than VIP- and TRPV2-ir SMG neurons, respectively. Other neurochemical substances were rare in the SMG. In the human submandibular gland, TRPV1- and TRPV2-ir nerve fiber profiles were seen around blood vessels. Double fluorescence method also demonstrated that TRPV2-ir nerve fiber profiles were located around myoepithelial and acinar cells in the submandibular gland. VIP and TRPV2 are probably expressed by both pre- and post-ganglionic neurons innervating the submandibular and sublingual glands. VIP, DBH and TRPV2 may have functions about regulation of salivary components in the salivary glands and neuronal activity in the SMG.
- Published
- 2021
4. Sensory neurons in the human jugular ganglion
- Author
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Hiroyuki Ichikawa, Takehiro Yajima, Tadasu Sato, Keiichiro Atsumi, Daisuke Tachiya, Takashi Sasano, Souichi Kokubun, and Noriaki Shoji
- Subjects
Male ,0301 basic medicine ,medicine.medical_specialty ,Sensory Receptor Cells ,Calcitonin Gene-Related Peptide ,TRPV Cation Channels ,Neuropeptide ,Sensory system ,Substance P ,Biology ,Calcitonin gene-related peptide ,03 medical and health sciences ,0302 clinical medicine ,Internal medicine ,medicine ,Humans ,Aged ,Neurotransmitter Agents ,Neurogenic inflammation ,Neuropeptides ,Vagus Nerve ,Nodose Ganglion ,Cell Biology ,General Medicine ,Middle Aged ,Immunohistochemistry ,Vagus nerve ,030104 developmental biology ,medicine.anatomical_structure ,Endocrinology ,nervous system ,Female ,Ganglia ,Autopsy ,Nucleus ,Free nerve ending ,Ear Canal ,030217 neurology & neurosurgery ,Vasoactive Intestinal Peptide ,Developmental Biology - Abstract
The jugular ganglion (JG) contains sensory neurons of the vagus nerve which innervate somatic and visceral structures in cranial and cervical regions. In this study, the number of sensory neurons in the human JG was investigated. And, the morphology of sensory neurons in the human JG and nodose ganglion (NG) was compared. The estimated number of JG neurons was 2721.8–9301.1 (average number of sensory neurons ± S.D. = 7975.1 ± 3312.8). There was no significant difference in sizes of the neuronal cell body and nucleus within the JG (cell body, 1128.8 ± 99.7 μ m2; nucleus, 127.7 ± 20.8 μ m2) and NG (cell body, 963.8 ± 225.7 μ m2; nucleus, 123.2 ± 32.3 μ m2). These findings indicate that most of sensory neurons show the similar morphology in the JG and NG. Our immunohistochemical method also demonstrated the distribution of ion channels, neurotransmitter agents and calcium-binding proteins in the human JG. Numerous JG neurons were immunoreactive for transient receptor potential cation channel subfamily V member 1 (TRPV1, mean ± SD = 19.9 ± 11.5 %) and calcitonin gene-related peptide (CGRP, 28.4 ± 6.7 %). A moderate number of JG neurons contained TRPV2 (12.0 ± 4.7 %), substance P (SP, 15.7 ± 6.9 %) and secreted protein, acidic and rich in cysteine-like 1 (SPARCL1, 14.6 ± 7.4 %). A few JG neurons had vesicular glutamate transporter 2 (VGLUT2, 5.6 ± 2.9 %) and parvalbumin (PV, 2.3 ± 1.4 %). SP- and TRPV2-containing JG neurons had mainly small and medium-sized cell bodies, respectively. TRPV1- and VGLUT2- containing JG neurons were small to medium-sized. CGRP- and SPARCL1-containing JG neurons were of various cell body sizes. Sensory neurons in the human JG were mostly free of vasoactive intestinal polypeptide (VIP), tyrosine hydroxylase (TH) and neuropeptide Y (NPY). In the external auditory canal skin, subepithelial nerve fibers contained TRPV1, TRPV2, SP, CGRP and VGLUT2. Perivascular nerve fibers also had TRPV1, TRPV2, SP, CGRP, VIP, NPY and TH. However, PV- and SPARCL1-containing nerve endings could not be seen in the external auditory canal. It is likely that sensory neurons in the human JG can transduce nociceptive and mechanoreceptive information from the external auditory canal. Theses neurons may be also associated with neurogenic inflammation in the external auditory canal and ear-cough reflex through the vagus nerve.
- Published
- 2020
5. Nerve Injury Increases the Expression of Alpha-2/Delta-1 Subunit of L-Type Calcium Channel in Sensory Neurons of Rat Spinal and Trigeminal Nerves
- Author
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Hiroyuki Ichikawa, Tadasu Sato, and Daisuke Tachiya
- Subjects
0301 basic medicine ,medicine.medical_specialty ,Original Paper ,Chemistry ,General Neuroscience ,Calcium channel ,Sensory system ,Masseteric nerve ,Nerve injury ,03 medical and health sciences ,Infraorbital nerve ,Trigeminal ganglion ,030104 developmental biology ,0302 clinical medicine ,Endocrinology ,medicine.anatomical_structure ,Dorsal root ganglion ,nervous system ,Internal medicine ,medicine ,Sciatic nerve ,medicine.symptom ,030217 neurology & neurosurgery - Abstract
By immunohistochemistry, an effect of nerve injury on distribution of alpha-2/delta-1 subunit of L-type calcium channel was investigated in rat's 4th and 5th lumbar dorsal root ganglia (DRGs), trigeminal ganglion (TG), and mesencephalic trigeminal nucleus (Mes5). The immunoreactivity was expressed by 52.2% of DRG neurons and 31.4% of TG neurons in intact animals. These neurons mostly had small-to-medium-sized cell bodies. In the DRG and TG, alpha-2/delta-1 subunit-positive neurons were lightly or moderately stained. However, the number of alpha-2/delta-1 subunit-immunoreactive (-IR) neurons dramatically increased in the ipsilateral DRG at 3-28 days after sciatic nerve transection (75.3-79.5%) and in the ipsilateral TG at 7 days after infraorbital nerve transection (66.3%). The IR density of alpha-2/delta-1 subunit in DRG and TG neurons was also elevated by the transection. In the injured DRG and TG, many sensory neurons with small-to-medium-sized cell bodies were strongly stained. Some large DRG and TG neurons showing strong staining intensity also appeared after the treatment. In the intact Mes5, sensory neurons were mostly devoid of alpha-2/delta-1 subunit-immunoreactivity (0.4%). However, alpha-2/delta-1-IR sensory neurons on the ipsilateral side of the Mes5 dramatically increased at 7 days after masseteric nerve transection (31.3%). A double immunofluorescence method also demonstrated that c-Jun activating transcription factor 3 (ATF3)-positive DRG (98.3-99.9%) and Mes5 (81.8%) neurons mostly co-expressed alpha-2/delta-1 subunit after the nerve injuries. However, alpha-2/delta-1 subunit immunoreactivity was relatively infrequent among ATF3-immunonegative DRG neurons (51.6-74.1%) and Mes5 neurons (
- Published
- 2017
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