These are broad-spectrum antibiotics. Scientists have suggested that they may affect the gut microbiome, which is dependent on a normal immune response.
The researchers also found that gut bacteria inhibited the growth of metastases by helping specific gut immune cells, killer (NK) and T-helper (Th1) cells, multiply. However, antibiotics reduce the migration of NK and Th1 cells from the gut to the tumor site by about eight times.
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