scholarly journals Antiinflammatory and analgesic effects of somatostatin released from capsaicin-sensitive sensory nerve terminals in a Freund's adjuvant-induced chronic arthritis model in the rat

2004 ◽  
Vol 50 (5) ◽  
pp. 1677-1685 ◽  
Author(s):  
Zsuzsanna Helyes ◽  
Árpád Szabó ◽  
József Németh ◽  
Balázs Jakab ◽  
Erika Pintér ◽  
...  

The demonstration of depolarization-induced release of substance P, Met- and Leu-enkephalin, somatostatin, neurotensin, vasoactive intestinal polypeptide and cholecystokinin-like material from various regions of rat brain in vitro supports the hypothesis that these and other neuropeptides may act as neurotransmitters. In each case the stimulusevoked release, but not the basal release, of peptide was dependent on the presence of calcium ions in the external medium. The stimulus-evoked release of substance P from nerve terminals in rat substantia nigra may be regulated by presynaptic γ -aminobutyric acid (GABA) receptors. The possible existence of presynaptic opiate receptors on substance P-containing sensory nerve terminals may offer an explanation for the analgesic effects of opiates at spinal cord level, and for the existence of enkephalin neurons in substantia gelatinosa. Capsaicin releases substance P from spinal cord nerve terminals and may impair their function, while having no effect on substance P neurons in supraspinal regions. The possibility of cosecretion of peptide and amine products from the same cells is discussed.


1995 ◽  
Vol 23 (03n04) ◽  
pp. 273-278 ◽  
Author(s):  
Hwa-Woei Chih ◽  
Chun-Ching Lin ◽  
Kung-Sheng Tang

"Ham-Hong-Chho" is a folk medicine in Taiwan, derived from the entire plants of Bidens pilosa L. var. minor (Blume) Sherff (Compositae), B. pilosa L. and B. chilensis DC. The anti-inflammatory effect of aqueous extracts of the three plants against paw edema induced by carrageenan and chronic arthritis induced by complete Freund's adjuvant were determined in rats. The results indicated that paw edema induced by carrageenan was significantly decreased by treatment with aqueous extracts (150 or 300 mg/kg) of all three plants ( p < 0.05) and that the effect of Bidens pilosa var. minor was the most potent. However, only extracts (500 mg/kg) of B. pilosa L. var. minor and B.pilosa L. significantly decreased the paw edema induced by complete Freund's adjuvant ( p < 0.05).


1995 ◽  
Vol 23 (02) ◽  
pp. 145-152 ◽  
Author(s):  
Chun-Ching Lin ◽  
Ming-Feng Chen ◽  
Chieh-Fu Chen

San-Miao-Warn (SMW), Tuhwo-Jih-Shen-Tang (TJS) and Dang-Quei-Nian-Tong-Tang (DGT) are Chinese traditional prescriptions. In this study, we evaluated the anti-inflammatory activities of these crude drug prescriptions in carrageenan-induced acute arthritis and complete Freund's adjuvant (CFA)-induced chronic arthritis in rats. It was found that pretreatment with SMW, TJS or DGT at a dosage of 100 mg/kg or 300 mg/kg, significantly inhibited carrageenan-induced acute arthritis. Moreover, these crude drugs also significantly suppressed the development of chronic arthritis induced by CFA. These results suggest that SMW, TJS and DGT are potential anti-inflammatory agents and may be considered as alternatives for non-steroid anti-inflammatory drugs (NSAID).


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