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Laparotomy and laparoscopy differentially accelerate experimental flank tumour growth
M L Da Costa1, H P Redmond, N Finnegan
1Department of Surgery, Royal College of Surgeons in Ireland, Beaumont Hospital, Dublin.
The British Journal of Surgery
|October 22, 1998
Summary
Laparotomy and laparoscopy increase tumor growth and suppress immune cells. Laparotomy has a more significant and prolonged effect on tumor growth and immune function compared to laparoscopy.
Area of Science:
- Surgical oncology
- Immunology
- Experimental oncology
Background:
- Surgery can impair anti-tumor immunity and promote tumor progression.
- This study investigates the impact of laparoscopy versus laparotomy on tumor growth and immune responses.
Purpose of the Study:
- To compare the effects of laparoscopy and laparotomy on extraperitoneal tumor growth.
- To assess the impact of these surgical methods on host immune function, specifically natural killer (NK) and lymphokine-activated killer (LAK) cell activity.
Main Methods:
- Murine model with induced flank tumors.
- Randomization to anesthesia only, laparoscopy, or laparotomy.
- Tumor volume measurement over 10 days.
- Splenocyte analysis of NK and LAK cell cytotoxicity at 24, 48, and 96 hours post-procedure.
Main Results:
- Both laparotomy and laparoscopy significantly increased flank tumor growth within 48 hours.
- Tumor growth remained significantly elevated after laparotomy at 96 hours, but not laparoscopy.
- Laparotomy significantly suppressed NK and LAK cell cytotoxicity from 24 to 96 hours.
- Laparoscopy showed significant immune suppression only within the first 48 hours.
Conclusions:
- Laparotomy significantly accelerates extraperitoneal tumor growth, correlating with prolonged suppression of NK and LAK cell cytotoxicity.
- Laparoscopy demonstrates a less pronounced and shorter-lasting impact on both tumor growth and immune function compared to laparotomy.