Antinociceptive and anti-inflammatory effects of a mucin-binding agglutinin isolated from the red marine alga Hypnea cervicornis.
The agglutinin from the red marine alga Hypnea cervicornis (HCA) was tested in models of nociception and inflammation. The role of carbohydrate-binding sites and the systemic toxicity were assessed. HCA (10(-1), 1, and 10 mg/kg) administered i.v. to mice inhibited writhes induced by acetic acid and, at 10 mg/kg, inhibited the second phase of the formalin test, but did not alter the response latency in the hot-plate test. HCA (1 mg/kg) administered i.v. to rats reduced carrageenan-induced paw edema at 1, 2, and 3 h after challenge, but not edema induced by dextran. The neutrophil migration induced by both N-formyl-methionyl-leucyl-phenylalanine (fMLP) and carrageenan was inhibited by HCA at 10(-1), 1, and 10 mg/kg. The combination of HCA (1 mg/kg) and its ligand mucin reversed the lectin inhibitory effect on carrageenan-induced neutrophil migration and acetic acid-induced writhes. The i.v. treatment of rats with HCA (1 mg/kg) for 7 days did not affect body mass; liver, kidney or heart wet weight; blood leukocyte counts; urea, creatinine or serum transaminase activity; or macroscopy of the organs examined. In short, H. cervicornis agglutinin showed important antinociceptive and anti-inflammatory activity via interaction with the lectin carbohydrate-binding site.
Bitencourt
Flávio da S
Fda S
Department of Physiology and Pharmacology, Federal University of Ceará, Fortaleza, Brazil.
Figueiredo
Jozi G
JG
Mota
Mário R L
MR
Bezerra
Carla C R
CC
Silvestre
Priscila P
PP
Vale
Marcus R
MR
Nascimento
Kyria S
KS
Sampaio
Alexandre H
AH
Nagano
Celso S
CS
Saker-Sampaio
Silvana
S
Farias
Wladimir R L
WR
Cavada
Benildo S
BS
Assreuy
Ana M S
AM
de Alencar
Nylane M N
NM
D000373:Agglutinins / Q000494:pharmacology*; D000700:Analgesics / Q000494:pharmacology*; D000818:Animals; D000893:Anti-Inflammatory Agents / Q000494:pharmacology*; D037102:Lectins / Q000494:pharmacology* / Q000633:toxicity; D008297:Male; D051379:Mice; D009077:Mucins / Q000378:metabolism*; D010147:Pain Measurement; D051381:Rats; D017208:Rats, Wistar; D000461:Rhodophyta / Q000737:chemistry*
D000373:Agglutinins; D000700:Analgesics; D000893:Anti-Inflammatory Agents; D037102:Lectins; D009077:Mucins