No abstract available.
Colon* ; Humans* ; Substance P* ; Tetrodotoxin*

No abstract available.
Humans* ; Macrophages* ; Monocytes* ; Substance P*

No abstract available.
Immune System* ; Neuropeptides* ; Substance P*

No abstract available.
Dental Pulp* ; Humans* ; Interleukin-8* ; Substance P*

No abstract available.
Animals ; Calcitonin* ; Nasal Mucosa* ; Rats* ; Substance P*

BACKGROUND: Despite concern about information of neuropeptide, the has been no baseline study of neuropeptide in Koreans. OBJECTIVE: The purpose of the study was to investigate the skin sinsitivity of substance P and VIP in normal healthy persoas. METHODS: We prepared 1000pM, 100pM, 10pM solution of substan P 1-11, substnace P 1-7, substnace P 7-11, and VIP. We injected intradermally 50ul of the br ve solutions on 12 sites of both forearms in addition plaebo. We measured the size of the area of flare and wheal along time. We repeated the same test after antihistamine intake. RESULTS: Flare and wheal respinses were dose dependent. Injection of substance P 1-7 did not evoke wheal responses and injection of substance P 7-11 did not wake flare responses. Flare responses of substance P 1-11, ubstance P 7-11, VIP were inhibiteb antihistamine and wheal responses of VIP were inhibitedly antihistamine. CONCLUSION: N-terminal of subtance P is responsible for flarers onses and C-terminal of substnace P is responsible for wieal responses. Flare responses of sisance P were mediated by histamine but wheal responses osubstance P were direct effect on postcapillary venule. Flare and wheal responses of VIF were mediated by histamine.
Forearm ; Histamine ; Humans ; Neuropeptides ; Skin ; Substance P* ; Venules

<p>OBJECTIVETo study the reactive changes of normal nasal mucosa in rabbit under photodynamic therapy (PDT) and to make a preliminary research for the treatment of allergic rhinitis (AR) with PDT.p><p>METHODSTwenty-four New Zealand rabbits were divided into 2 groups, an experimental group and a control group with 12 rabbits in each group. PDT was applied to the experimental group, while the control group was given no treatment. The nasal mucosa was sampled separately from the same position of the rabbits from the 2 groups on 1st, 3rd, 7th, 14th, 21st, 28th day. Histomorphological changes of the sampled nasal mucosa were observed under light microscope and transmission electron microscope (TEM). The damage of three tachykinins: substance P (SP), neurokinin A (NKA) and neurokinin B (NKB) of nerve fibers was observed after immunohistochemical staining.p><p>RESULTSCompared with the control group, the nasal mucosa tissues from the experimental group had serious inflammatory reaction with basal layer damaged on the 1st and 3rd day after PDT application, the epithelial cells of nasal mucosa were arranged in disorder, and part of cilium shortened and became abnormal or even disappeared, each organelles damaged obviously; on the 7th, 14th, 21st day, it could be seen that ciliated cell, columnar cell and goblet cell started regeneration, basal cell and lamina propria glands proliferated, and the glands appeared secretion phenomenon; on the 28th day, ciliated columnar epithelium took back the nasal mucosas with small amount of microvilli, and mucous granules were found in the column cells. Nasal immunohistochemical staining of the experimental group from various stages showed that three kinds of neuropeptides were not expressed.p><p>CONCLUSIONSNormal rabbit nasal mucosas will be temporarily damaged after PDT application, the damaged nasal mucosa begin to recover in one week, and return to normal in about four weeks. Most structure and functions have recovered at the fourth week except some nerve endings.p>
Animals ; Cilia ; Inflammation ; Nasal Mucosa ; Neuropeptides ; Photochemotherapy ; Rabbits ; Substance P

<p>OBJECTIVETo investigate the effects of substance P on cultured rat osteoclasts.p><p>METHODSNeurokinin-1 (NK1) receptor expression in osteoclasts was examined by immunohitochemical method, and changes of bone resorption activity caused by substance P and NK1 receptor antagonists were detected by pit formation assay.p><p>RESULTSImmunoreactivity for NK1 receptor was distributed in the cytoplasm of osteoclasts. The average of pit formation areas significantly increased with addition of substance P (10(-7)-10(-4) mol/L) (P < 0.05), but the number of pitformations did not change (P > 0.05). NK1 receptor antagonists inhibited the enhancement of the bone resorption by substance P addition.p><p>CONCLUSIONThe findings suggested that substance P may stimulate osteoclasts and result in bone resorption by the mediation of NK1 receptor.p>
Animals ; Osteoclasts ; Rats ; Receptors, Neurokinin-1 ; Substance P

OBJECTIVE: In inflammation, hyperalgesia is a common phenomenon but its mechanism has not been clarified. Recently some reports suggested substance P might be important factors for inflammatory hyperalgesia in somatic tissue. This study was performed to see whether substance P modulate the activities of uterine afferent fibers in the hypogastric nerve of the cat. METHODS: While recording the electrical activities of nerve fibers, mechanical stimuli were applied as balloon distention using balloon inserted into uterine lumen before and during substance P infusion through uterine artery. RESULTS: Substance P increased the responses to balloon distension of uterus in 14 uterine mechanoreceptive afferent fibers of 24 over 10% compared to before substance P infusion, and decreased the responses of 3. And L-703,606, the neurokinin 1 receptor antagonist failed the modulation of mechano sensitive response by substance P and reduced the spontaneous activities. CONCLUSIONS: These results suggest that substance P modulated the activities of uterine nerve fibers and their responses to mechanical stimulus. It is hypothesized that this kind of modulation of afferent nerve fibers by substance P may be important for the development of inflammatory hyperalgesia.
Animals ; Cats ; Hyperalgesia ; Inflammation ; Mechanoreceptors* ; Nerve Fibers ; Receptors, Neurokinin-1 ; Substance P* ; Uterine Artery ; Uterus

BACKGROUND AND OBJECTIVES: Angiotensin -converting enzyme (ACE) inactivates bradykinin, substance P, and neurokinin A, which are thought to play important roles in the pathogenesis of inflammatory diseases. An insertion/deletion (I/D) poly - morphism in the ACE gene was reported to be associated with atopy in a Czech population. MATERIALS AND METHODS: Using the polymerase chain reaction, we investigated the frequencies of the genotypes and alleles of the ACE gene in 137 patients with allergic rhinitis and 498 healthy control subjects. RESULTS: There was no difference in the frequencies of the genotypes in the controls and patients with allergic rhinitis (p>0.05). The D allele was more frequent in patients with allergic rhinitis, but the difference was not statistically significant (p>0.05). CONCLUSION: Our results indicate that I/D polymorphism in the ACE gene is not related to susceptibility to allergic rhinitis in the Korean population.
Alleles ; Angiotensins ; Bradykinin ; Genotype ; Humans ; Neurokinin A ; Polymerase Chain Reaction ; Rhinitis* ; Substance P