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Secretion of proinflammatory cytokines by normal human melanocytes in response to lipopolysaccharide

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Tam I., Stępień K.
Acta Biochimica Polonica
|
2011
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vol. 58
|
issue 4
507-511
EN
A large body of evidence suggests that epidermal melanocytes are an integral part of the skin immune system and can be considered immunocompetent cells. Recently, it has been reported that human melanocytes constitutively express Toll-like receptors and may be involved in the induction of several inflammatory cytokines. In the study the secretion of IL-1β, IL-6 and TNF-α by cultured normal melanocytes was investigated after stimulation with lipopolysaccharide. LPS increased the secretion of IL-1β in a dose-dependent manner. IL-1β stimulated release of IL-6 and TNF-α by melanocytes, whereas LPS activated production of TNF-α, but not of IL-6. These observations indicate that LPS can participate in the regulation of cytokine activity in normal human melanocytes and suggest that cytokines released by melanocytes could affect melanocytes themselves or/and other cells of the epidermis.
2
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Serum Proinflammatory Cytokine Levels and White Blood Cell Differential Count in Patients with Different Degrees of Severity of Acute Alcoholic Pancreatitis

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Panek J., Kuśnierz-Cabala B., Dolecki M., Pietron J.
Polish Journal of Surgery
|
2012
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vol. 84
|
issue 5
230-237
EN
Several studies suggest that cytokines and neutrophils play an important role in the pathogenesis of acute pancreatitis (AP).The aim of the study was to assess the systemic release of proinflammatory cytokines and WBC (white blood cells) count with differential in patients with acute alcoholic pancreatitis (AAP) and to characterize the differences between patients with mild and severe forms of the disease.Material and methods. Thirty-five patients with the mild form of acute alcoholic pancreatitis (MAAP) were compared to 11 patients with severe acute alcoholic pancreatitis (SAAP). Serum levels of IL-6, IL-8, IL-12p40 and WBC differential count were measured every second day during the first week after admission.Results. During the course of the study, the average level of IL-6 was significantly (p<0.05) higher in patients with SAAP than in patients with the mild form of the disease (MAAP). Serum levels of IL-8 and IL-12p40 on admission were higher in patients with SAAP than in patients with MAAP but the difference was not statistically significant. Of all the types of WBCs, neutrophils were significantly (p<0.05) elevated the entire time in SAAP patients when compared to patients with MAAP on 5th and 7th day from admission to hospital.Conclusions. Patients with SAAP had significantly higher proinflammatory cytokine IL-6 levels and neutrophil counts than patients with MAAP. The results suggest that proliferation and overstimulation of this subset of leukocytes might contribute to the development of the systemic inflammatory response in patients with SAAP.
3
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Influence of megestrol acetate on nutrition and inflammation in dialysis patients - preliminary results

100%
Gołębiewska J., Lichodziejewska-Niemierko M., Aleksandrowicz E., Majkowicz M., Łysiak-Szydłowska W., Rutkowski B.
Acta Biochimica Polonica
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2009
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vol. 56
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issue 4
733-737
EN
Malnutrition is a common clinical problem in dialysis patients. So far the management of malnutrition in this population has not been fully successful. The aim of the study was to evaluate the efficacy and safety of use of megestrol acetate suspension in malnourished dialysis patients. Twenty-six hypoalbuminemic (albumin ≤ 3.8 g/dl) dialysis patients took 160 mg of megestrol acetate daily for a period of two months. Anthropometry (dry weight, body mass index) and biochemical measurements of nutrition (serum albumin, triglycerides, total cholesterol) and inflammation (hsCRP, IL-1β, IL-6) were performed on a monthly basis. The treatment led to a statistically significant increase (P < 0.05) in anthropometry and albumin concentration, with no statistically significant changes in total cholesterol, triglycerides and indices of inflammation. Side effects included overhydration, diarrhoea and hyperglycaemia. Thus, megestrol acetate may be an effective therapeutic agent in improving the nutritional status of carefully selected dialysis patients, while it might not mitigate inflammation. Because of the prevalent side effects it must be monitored closely.
4
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Serum proinflammatory cytokine levels and white blood cell differential count i patients with different degrees of severity of acute alcoholic pancreatitis

100%
Panek J., Kuśnierz-Cabala B., Dolecki M., Pietron J.
Polish Journal of Surgery
|
2012
|
vol. 84(5)
230-237
EN
Several studies suggest that cytokines and neutrophils play an important role in the pathogenesis of acute pancreatitis (AP). the aim of the study was to assess the systemic release of proinflammatory cytokines and WBC (white blood cells) count with differential in patients with acute alcoholic pancreatitis (AAP) and to characterize the differences between patients with mild and severe forms of the disease. Material and methods. Thirty-five patients with the mild form of acute alcoholic pancreatitis (MAAP) were compared to 11 patients with severe acute alcoholic pancreatitis (SAAP). Serum levels of IL-6, IL-8, IL-12p40 and WBC differential count were measured every second day during the first week after admission. Results. During the course of the study, the average level of IL-6 was significantly (p<0.05) higher in patients with SAAP than in patients with the mild form of the disease (MAAP). Serum levels of IL-8 and IL-12p40 on admission were higher in patients with SAAP than in patients with MAAP but the difference was not statistically significant. Of all the types of WBCs, neutrophils were significantly (p<0.05) elevated the entire time in SAAP patients when compared to patients with MAAP on 5th and 7th day from admission to hospital. conclusions. Patients with SAAP had significantly higher proinflammatory cytokine IL-6 levels and neutrophil counts than patients with MAAP. The results suggest that proliferation and overstimulation of this subset of leukocytes might contribute to the development of the systemic inflammatory response in patients with SAAP.
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