KLRB1 and sialadenitis: In pSS patients the number of circulating CD161+ TCRVα7.2+ MAIT cells was decreased compared to controls, whereas in salivary gland tissue the number of (CD161+) TCRVα7.2+ MAIT cells was elevated as compared to non-Sjogren sicca patients and mild sialoadenitis patients (without anousspSS) (48, 49).