BACKGROUND: Alteration of the immune system is one of the major mechanisms responsible for complications in severe acute pancreatitis (AP). The aim of our study was to provide a complex evaluation of peripheral blood monocyte subsets, natural killer cells (NK cells) and cytotoxic T lymphocytes in patients with different severity forms of AP. METHODS: 20 patients with mild AP and 15 with severe AP (S-AP) were included in our study. Peripheral blood mononuclear cells were studied on days 1-3, 5, 10 and 30, by means of flow cytometry. RESULTS: In peripheral blood of patients with pancreatitis, we found a marked increase in total monocyte count. In S-AP, circulating monocytes were significantly activated, which was presumed from increased expression of HLA-DR, CD54, CD69 and CD25. Concurrent increased expression of CD95 (FasR) may indicate enhanced susceptibility of these cells to apoptosis. In patients with S-AP, a dramatic depletion of circulating NK cells (CD16/56 and CD3- CD8+) was found along with a reduction of circulating CD3+ CD8+ lymphocytes (cytotoxic T lymphocytes). CONCLUSION: Our findings suggest profound disturbances of innate cellular immunity in patients with S-AP. Copyright 2008 S. Karger AG, Basel.
BACKGROUND: Alteration of the immune system is one of the major mechanisms responsible for complications in severe acute pancreatitis (AP). The aim of our study was to provide a complex evaluation of peripheral blood monocyte subsets, natural killer cells (NK cells) and cytotoxic T lymphocytes in patients with different severity forms of AP. METHODS: 20 patients with mild AP and 15 with severe AP (S-AP) were included in our study. Peripheral blood mononuclear cells were studied on days 1-3, 5, 10 and 30, by means of flow cytometry. RESULTS: In peripheral blood of patients with pancreatitis, we found a marked increase in total monocyte count. In S-AP, circulating monocytes were significantly activated, which was presumed from increased expression of HLA-DR, CD54, CD69 and CD25. Concurrent increased expression of CD95 (FasR) may indicate enhanced susceptibility of these cells to apoptosis. In patients with S-AP, a dramatic depletion of circulating NK cells (CD16/56 and CD3- CD8+) was found along with a reduction of circulating CD3+ CD8+ lymphocytes (cytotoxic T lymphocytes). CONCLUSION: Our findings suggest profound disturbances of innate cellular immunity in patients with S-AP. Copyright 2008 S. Karger AG, Basel.
Authors: Murli Manohar; Elaina K Jones; Samuel J S Rubin; Priyanka B Subrahmanyam; Gayathri Swaminathan; David Mikhail; Lawrence Bai; Gulshan Singh; Yi Wei; Vishal Sharma; Janet C Siebert; Holden T Maecker; Sohail Z Husain; Walter G Park; Stephen J Pandol; Aida Habtezion Journal: Gastroenterology Date: 2021-08-25 Impact factor: 22.682