Inhibition of three novel Radix Scutellariae extracts on immediate hypersensitivity.
BACKGROUND
Radix Scutellariae, a few papers reported its pharmacology activities including alleviate small intestines smooth muscles spasm, sedation, antihypertensive effect. However, the inhibition of its different organic extracts on immediate hypersensitivity has not bee researched.


METHODS
To investigate the anti-immediate hypersensitivity of three extracts including ethanol extracts, acetone extracts, ethyl acetate extracts from Radix Scutellariae, four pharmacological screening model were chose, such as 4-Aminopyridine induced pruritus model, histamine-induced mouse paw edema model, PCA(passive cutaneous anaphylaxis) in ear of mouse, activie cutaneous anaphylaxismouse (mouse ear edema test), furthermore, total IgE level in the sensitized mice serum was evaluated deeply.


RESULTS
Ethanol group at 1.42 g/kg and 0.71 g/kg could greatly decrease the licking number to 1.2 and 12.7 respectively; also keep mice paw swelling at 0.29 ml and 0.51 ml at 15 min after injection of histamine. Both ear passive cutaneous allergic reaction and active cutaneous anaphylaxis-ear swelling test demonstrated that ethanol group exhibit great inhibition on immediate hypersensitivity.Low IgE level was found in ethanol group, but high in other two groups.


CONCLUSIONS
The ethanol extracts exhibits obvious strong inhibition, however, the acetone ones and ethyl acetate showed a little.
Central Laboratory, The Luhe Teaching Hospital of the Capital Medical University, Beijing, China.
Xiaorong
X
Li
Reparative and reconstructive Sugery, Beijing Shijitan Hospital, Capital Medical University Beijing, China.
Jiangning
J
Wang
Department of Allergy, Beijing Shijitan Hospital, Capital Medical University, Beijing, China.
Haiyun
H
Shi
Plastic Surgery, The Luhe Teaching Hospital of the Capital Medical University, Beijing, China.
Lei
L
Gao
Department of Allergy, Beijing Shijitan Hospital, Capital Medical University, Beijing, China.
Xueyan
X
Wang
D000631:Aminopyridines; D000707:Anaphylaxis / Q000097:blood / Q000188:drug therapy*; D000818:Animals; D018926:Anti-Allergic Agents / Q000494:pharmacology / Q000627:therapeutic use*; D001522:Behavior, Animal; D004365:Drugs, Chinese Herbal / Q000494:pharmacology / Q000627:therapeutic use*; D004423:Ear; D004487:Edema / Q000139:chemically induced / Q000188:drug therapy; D005260:Female; D006969:Hypersensitivity, Immediate / Q000097:blood / Q000188:drug therapy / Q000473:pathology; D007073:Immunoglobulin E / Q000097:blood; D008297:Male; D051379:Mice; D010323:Passive Cutaneous Anaphylaxis / Q000187:drug effects*; D008517:Phytotherapy; D018517:Plant Roots; D031364:Scutellaria baicalensis; D012867:Skin / Q000187:drug effects* / Q000473:pathology
D000631:Aminopyridines; D018926:Anti-Allergic Agents; D004365:Drugs, Chinese Herbal; D007073:Immunoglobulin E
Anti-allergic activity; Ethanol extracts; IgE level; PCA; Radix Scutellariae