In order to investigate the effect of kefir consumption on mucositis induced by 5-FU based chemotherapy (CT), we monitored the systemic immune response by measurement of the serum proinflammatory cytokine levels and we evaluated the anti-microbial effect of kefir with an agar diffusion method. Forty patients with colorectal cancer were included in this randomized prospective study. On the first 5 days of each CT cycle, the study group received oral lavage with kefir and then swallowed 250 ml of kefir while control group received oral lavage with 0.09% NaCl twice a day. Before and after every cycle of CT, the oral mucosa was assessed. Serum proinflammatory cytokine levels were evaluated before the initiation and after the third and the sixth cycle. Kefir was administered in 99 out of 205 courses. Mucositis developed in 27.3% of the courses given with kefir administration and in 21.7% of the courses given with 0.9% NaCl oral rinses. The difference between the two groups was not statistically significant (p > 0.05). When we compared the serum proinflammatory cytokine levels of the two groups at the baseline and following the third and the sixth cycles, we again found no statistically significant difference (p > 0.05). Kefir consumption at the mentioned doses made no statistically significant effect on serum proinflammatory cytokine levels and on the incidence of mucositis development in cancer patients. Under in vitro conditions, kefir inhibits only Staphylococcus epidermidis.

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Objective: To investigate the effects of Nigella sativa seed supplementation on symptom levels, polymorphonuclear leukocyte (PMN) functions, lymphocyte subsets and hematological parameters of allergic rhinitis. Subjects and Methods: Twenty-four patients randomly selected from an experimental group of 31 (mean age 34 years) sensitive to house dust mites with allergic rhinitis and a control group of 8 healthy volunteers (mean age 23 years) were treated with allergen-specific immunotherapy in conventional doses for 30 days. After a month of immunotherapy, 12 of the 24 patients and the 8 healthy volunteers were given N. sativa seed supplementation (2 g/day orally) for 30 days. The remaining 12 patients continued only on immunotherapy during the same period. The other 7 patients were given 0.1 ml saline solution subcutaneously once a week as a placebo. The symptom scores, PMN functions, lymphocyte subsets and other hematological parameters were evaluated before and after all treatment periods. Results: There was a statistically significant increase in the phagocytic and intracellular killing activities of PMNs of patients receiving specific immunotherapy, especially after the addition of N. sativa seed. The CD8 counts of patients receiving specific immunotherapy plus N. sativa seed supplementation significantly increased compared to patients receiving only specific immunotherapy. PMN functions of healthy volunteers significantly increased after N. sativa seed supplementation compared to baseline. Conclusion:N. sativa seed supplementation during specific immunotherapy of allergic rhinitis may be considered a potential adjuvant therapy.

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