No abstract available.
Basophils* ; Histamine Release* ; Histamine*

No abstract available.
Animals ; Histamine Release* ; Histamine* ; Mast Cells* ; Rats*

No abstract available.
Anaphylaxis* ; Histamine Release* ; Histamine* ; Mast Cells*

No abstract available.
Animals ; Calcium* ; Histamine Release* ; Histamine* ; Mast Cells* ; Rats*

No abstract available.
Animals ; Guinea Pigs* ; Guinea* ; Heart* ; Histamine Release* ; Histamine*

BACKGROUND: The fruit of Rubus coreanus (RC), a perennial herb, has been cultivated for a long time as a popular vegetable. The anti-allergy mechanism of RC is unknown. The purpose of this study is to investigate the inhibitory effect of RC on compound 48/80- or anti-DNP IgE-induced mast cell activation. METHODS: For this, influences of RC on the compound 48/80-induced degranulation, histamine release, calcium influx and the change of the intracellular cAMP (cyclic adenosine-3',5' monophosphate) levels of rat peritoneal mast cells (RPMC) and on the anti-DNP IgE-induced histamine release of RPMC were observed. RESULTS: The pretreatment of RC inhibited compound 48/ 80-induced degranulation, histamine release and intracelluar calcium uptake of RPMC. The anti-DNP IgE-induced histamine release of RPMC was significantly inhibited by pretreatment of RC. The RC increased the level of intracellular cAMP of RPMC, and the pretreatment of RC inhibited compound 48/80-induced decrement of intracellular cAMP of RPMC. CONCLUSION: These results suggest that RC contains some substances with an activity to inhibit the compound 48/80- or anti-DNP IgE-induced mast cell activitation. The inhibitory effects of RC are likely due to the stabilization of mast cells by blocking the calcium uptake and enhancing the level of intracellular cAMP.
Animals ; Calcium ; Fruit ; Histamine ; Histamine Release ; Mast Cells* ; Rats ; Vegetables

No abstract available.
Aeromonas hydrophila* ; Aeromonas* ; Animals ; Histamine Release* ; Histamine* ; Mast Cells* ; Rats*

We previously described a rare case of anaphylaxis presumably induced by carminic acid in cochineal dye used as a food additive. In this study, highly pure carminic acid was added to an albumin-containing buffer at various concentrations, followed by serial dilution. Varying the mixing ratio of carminic acid and albumin affected the extent of histamine release from passively sensitized basophils. Similar basophil histamine release occurred with carminic acid-globulin solutions. These results provide experimental evidence indicating that basophil activation is dependent on hapten (carminic acid) and carrier (protein) interaction.
Anaphylaxis ; Basophils ; Carmine ; Food Additives ; Histamine Release ; Hypersensitivity ; In Vitro Techniques

Although it has been known that seminal plasma (SP) modulates immune responses, the morphologic and functional effects of SP on mast cells have not been well documented. The purpose of this study was to determine the morphologic and functional effects of SP from the azoospermic (ASP), oligozoospermic (OSP) and normozoospermic (NSP) men on rat peritoneal mast cells (RPMC). By inverted microscopy, degranulation of RPMC occurred by treatment of OSP, NSP or compound 48/80. Treatment of RPMC with OSP and NSP resulted in increase in size and decrease in surface folds and bulged granules from the cell surface indicating that degranulating processes took place. Irregular cell surface with few microvilli and large degranulation channels filled with altered granules of various sizes were observed in OSP or NSP-treated RMPC. The degranulation index (DI) of RPMC treated with HBSS was 8.8+/-5.0. SP-induced DI was 11.9+/-6.2, 57.1+/-16.9 and 61.9+/-15.8, in ASP, OSP and NSP, respectively. The DI of RPMC treated with compound 48/80 (1 microgram/ml) was 83.5+/-21.4. These results indicated that the OSP, NSP but not ASP, induced the degranulation of RPMC. OSP and NSP induced histamine release (HR) from RPMC (4.5x105 cells). The HR of RPMC treated with HBSS was 1,030+/-196.6ng/ml, whereas ASP, OSP and NSP-induced HR was 1,010+/-204.7, 2,794+/-453.3 and 2,899 +/-366.7 ng/ml, respectively. The HR of RPMC treated with compound 48/80 was 6,300+/-476.2 ng/ml. Intracellular calcium level(ICL) of RPMC was also increased by OSP and NSP. The ICL of RPMC treated with HBSS was 6.1+/-1.0 pmole. ASP, OSP and NSP-induced ICL was 9.0+/-1.1, 81.2+/-18.5 and 76.6+/-18.0 pmole, respectively. The ICL of RPMC treated with compound 48/80 was 102.9+/-22.2 pmole. From the above results, it is suggested that OSP and NSP contain some factors to degranulate RPMC by the increase of intracellular calcium level.
Animals ; Calcium ; Histamine Release* ; Histamine* ; Humans ; Male ; Mast Cells* ; Microscopy ; Microvilli ; Rats* ; Semen* ; Viperidae

BACKGROUND: It has been reported that Cortex mori ( Morus alba L, Sangbaikpi ; CM ), the root bark of mulberry tree, plays a role in inhibiting mast cell activation. Human seminal plasma ( HSP ) modulates immune systems and activates rat peritoneal mast cells ( RPMC ). However, the inhibitory agents of HSP - induced mast cell activation have not been disclosed yet. OBJECTIVE AND METHOD: This study was undertaken to determine the effects of CM on HSP-induced mast cell activation by morphologic and functional methods. Morphological changes of RPMC by HSP alone or CM plus HSP were observed with the inverted light microscope. And the amounts of histamine and calcium were measured by radioisotopic enzymatic histamine and radioisotopic calcium assays. RESULTS: By inverted microscopy, HSP-induced RPMC degranulation occurred in a dose-dependent fashion. After pretreatment of RPMC with CM, there was no HSP-induced degranulation. Degranulation index (DI) of RPMC treated with Hanks balanced salt solution (HBSS), CM or HSP was 7.0+/-4.3, 9.0+/-6.2, 56.5+/-16.9, respectively. After pretreatment of RPMC with CM, HSP-induced DI was 11.0 +/-7.1. These results indicate that CM inhibited HSP-induced degranulation of RPMC. HSP-induced RPMC histamine release (HR) was dose-dependent. HR of RPMC treated with HBSS, CM or HSP was 0.18+/-0.10, 0.30+/-0.19, 4.48+/-0.86 ug/ml, respectively. After pretreatment of RPMC with CM, HSP-induced HR was 0.52+/-0.21 ug/ml. These results indicate that CM inhibited HSP-induced HR from RPMC. Intracellular calcium level ( ICL) of RPMC was also increased according to the concentration of HSP. ICL of RPMC treated with HBSS, CM or HSP was 6.1+/-1.0, 9.0+/-2.1, 30.2+/-6.5 pmole, respectively. After pretreatment of RPMC with CM, HSP-induced ICL of RPMC was 11.6 +/- 3.3 pmole. These results indicate that CM inhibited HSP-induced calcium uptake of RPMC. CONCLUSION: From these results, it is suggested that CM contains some substances which inhi-
Animals ; Calcium ; Histamine ; Histamine Release ; Humans* ; Immune System ; Mast Cells* ; Microscopy ; Morus ; Rats* ; Semen* ; Trees