Meanings of foreign ag in English

These results revealed functional differences between intrathymically developed, foreign Ag-specific T cells and extrathymically developed, self Ag-specific T cells.

MM cells also cause Th17 skewing to foreign Ag in normal mice without Th17-polarizing culture conditions.

The primary function of Tregs is to maintain a balance between immunity ( foreign Ag) and tolerance (self Ag) to tissues.