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T lymphocyte subsets and Th1/Th2 balance after laparoscopy-assisted distal gastrectomy
1Department of Surgery I, Oita Medical University, Oita 879-5593, Japan. kyufujii@oita-med.ac.jp
Surgical Endoscopy
|June 24, 2003
Summary
Laparoscopic surgery for early gastric cancer preserves Th1 immune function better than open surgery. Laparoscopy-assisted distal gastrectomy (LADG) showed increased IFN-gamma production, unlike open distal gastrectomy (ODG).
Area of Science:
- Surgical Oncology
- Immunology
- Gastroenterology
Background:
- Laparoscopic surgery offers a less invasive approach for gastric cancer compared to open surgery.
- The impact of laparoscopic surgery on immune responses in early gastric cancer patients is not well understood.
Purpose of the Study:
- To investigate and compare the postsurgical immune responses following laparoscopic-assisted distal gastrectomy (LADG) and open distal gastrectomy (ODG) in early gastric cancer patients.
Main Methods:
- Peripheral blood mononuclear cells were analyzed from 20 early gastric cancer patients undergoing LADG or ODG.
- Flow cytometry was used to measure cell surface molecules and intracellular cytokines, specifically Interferon-gamma (IFN-gamma) and Interleukin-4 (IL-4).
Main Results:
- T lymphocyte populations (CD3+, CD4+, CD8+, CD57+, HLA-DR+) showed similar patterns after both LADG and ODG.
- Interferon-gamma (IFN-gamma) production, indicative of Th1 cell function, decreased after ODG but increased after LADG on postoperative day 3.
- Interleukin-4 (IL-4) production, representing Th2 cell function, increased postoperatively after ODG but not after LADG.
Conclusions:
- Laparoscopy-assisted distal gastrectomy (LADG) aids in preserving postsurgical Th1 cell-mediated immune function compared to open distal gastrectomy (ODG).
- LADG may offer immunological advantages over ODG in the context of early gastric cancer treatment.