Improvement of macromolecular clearance via lymph flow in hamster gingiva by low-power carbon dioxide laser-irradiation.
OBJECTIVE
Although therapeutic effects of low-power laser-irradiation on periodontal disease have been reported, little is known about the biological effects of laser-irradiation in the gingiva. Recently we reported that topical warming stimulated macromolecular clearance via lymph flow in hamster gingiva. This study was conducted to investigate whether low-power laser-irradiation affects macromolecular clearance via the lymph flow in the gingiva.


METHODS
We injected 14C-methylated albumin into the mandibular gingiva of anesthetized hamsters followed by topical carbon dioxide (CO2) laser-irradiation (30 seconds, 0.5-1.5 W). We measured the clearance of radiolabeled albumin from the gingiva and its drainage into submandibular lymph nodes during 10 minutes.


RESULTS
The clearance of the radiolabeled albumin from the gingiva and the influx into the submandibular lymph nodes were increased by CO2 laser-irradiation.


CONCLUSIONS
Low-power CO2 laser-irradiation improves macromolecular clearance via the lymph flow in hamster gingiva.
Shimotoyodome
A
A
Biological Science Laboratories, Kao Corporation, 2606 Akabane, Ichikai-machi, Haga-gun, Tochigi 321-3497, Japan.
Okajima
M
M
Kobayashi
H
H
Tokimitsu
I
I
Fujimura
A
A
D000418:Albumins / Q000378:metabolism*; D000818:Animals; D002245:Carbon Dioxide; D006224:Cricetinae; D005881:Gingiva / Q000378:metabolism / Q000528:radiation effects*; D028022:Low-Level Light Therapy / Q000379:methods*; D008196:Lymph / Q000378:metabolism* / Q000528:radiation effects*; D008647:Mesocricetus; D010510:Periodontal Diseases / Q000532:radiotherapy
D000418:Albumins; D002245:Carbon Dioxide