Experimental Study on Tissue Mast Cell Change of Ratskin Elicited by Mechanical Irritation Under General and Local Ansthesia / 대한피부과학회지

ABSTRACT

Normal albino rats weighing 180-200 gm were used for a series of this investigation on change of skin mast cell under general and local anesthesia. At first, left side abdominal skin was prepared by hair cutting with scissors about 3cm square and eight irritations by mean of biting with tip of forceps mosquito were applied along the prepared skin margin. Skin specimens were submitted from central area which surrounded by irritated points and also from intact contra-lateral area in 15, 30, 60 and l20 minutes invervals. Submiitted skin specimens were fixed in 10% formalin solution, then were stained with 1% toluidine blue. The number of mast cell was counted under 450X of microscopic examination. CONCLUSION l. There were two stages in changes of skin tissue mast cell number on normal saline solution injected area and irritated area by mean of biting with tip of forceps without any types of anesthesia. i) Decreasing stage Number of skin tissue mast cell was decreascd and reached to the lowest level at 30 minutes after each irritation. ii) Increasing stage Number of skin tissue mast cell was increased to the highest level at 120 minutes after each irritation. 2. General ether anesthesia could not infIuence on the change of mast cell number after mechanical biting irritation. 3, Local anesthesia with 2% procaine hydrochloride solution revealed slightly suppressing effect to increasing number of mast cell at 60 and 120 minutes after mechanical irritation. Hnwever, it was not evidence at 15 and 30 minutes after mechanical irritation. 4. There was no significant change of rnast cell number in the intact contralateraI skin area within 120 minutes under gencral and local anesthesia. 5. The number of degranulated mast cells did not correlated with counted total number of mast cells.