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However, the role of the purinergic receptor P2Y6 in the NK cells remains largely unknown. In this study, we discovered that the expression of P2Y6 was decreased upon the activation of the NK cells. Moreover, in the P2Y6-deficient mice, we found that the deficiency of P2Y6 promoted the development of the NK precursor cells into immature NK and mature NK cells. We also found that the P2Y6 deficiency increased, but the P2Y6 receptor agonist UDP or UDP analog 5-OMe-UDP decreased the production of IFN-\u03b3 in the activated NK cells. Furthermore, we demonstrated that the P2Y6-deficient NK cells exhibited stronger cytotoxicity in vitro and antimetastatic effects in vivo. Mechanistically, P2Y6 deletion promoted the expression of T-bet (encoded by Tbx21), with or without the stimulation of IL-15. In the absence of P2Y6, the levels of phospho-serine\/threonine kinase and pS6 in the NK cells were significantly increased upon the stimulation of IL-15. Collectively, we demonstrated that the P2Y6 receptor acted as a negative regulator of the NK cell function and inhibited the maturation and antitumor activities of the NK cells. Therefore, inhibition of the P2Y6 receptor increases the antitumor activities of the NK cells, which may aid in the design of innovative strategies to improve NK cell\u2013based cancer therapy.<\/jats:p>","DOI":"10.4049\/jimmunol.2000750","type":"journal-article","created":{"date-parts":[[2021,8,23]],"date-time":"2021-08-23T16:05:54Z","timestamp":1629734754000},"page":"1555-1565","source":"Crossref","is-referenced-by-count":12,"title":["Purinergic Receptor P2Y6 Is a Negative Regulator of NK Cell Maturation and Function"],"prefix":"10.1093","volume":"207","author":[{"given":"Zhenlong","family":"Li","sequence":"first","affiliation":[{"name":"Shanghai Key Laboratory of Regulatory Biology, School of Life Sciences, East China Normal University , Shanghai ,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yaoxin","family":"Gao","sequence":"additional","affiliation":[{"name":"Shanghai Key Laboratory of Regulatory Biology, School of Life Sciences, East China Normal University , Shanghai ,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cong","family":"He","sequence":"additional","affiliation":[{"name":"Shanghai Key Laboratory of Regulatory Biology, School of Life Sciences, East China Normal University , Shanghai ,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3916-5518","authenticated-orcid":false,"given":"Huan","family":"Wei","sequence":"additional","affiliation":[{"name":"Shanghai Key Laboratory of Regulatory Biology, School of Life Sciences, East China Normal University , Shanghai ,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7392-8270","authenticated-orcid":false,"given":"Jiang","family":"Zhang","sequence":"additional","affiliation":[{"name":"Shanghai Key Laboratory of Regulatory Biology, School of Life Sciences, East China Normal University , Shanghai ,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hongmei","family":"Zhang","sequence":"additional","affiliation":[{"name":"Shanghai Key Laboratory of Regulatory Biology, School of Life Sciences, East China Normal University , Shanghai ,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lulu","family":"Hu","sequence":"additional","affiliation":[{"name":"Shanghai Key Laboratory of Regulatory Biology, School of Life Sciences, East China Normal University , Shanghai ,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4999-4168","authenticated-orcid":false,"given":"Wenzheng","family":"Jiang","sequence":"additional","affiliation":[{"name":"Shanghai Key Laboratory of Regulatory Biology, School of Life Sciences, East China Normal University , Shanghai ,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2021,9,15]]},"reference":[{"key":"2025022610321142500_r1","doi-asserted-by":"crossref","first-page":"169","DOI":"10.1111\/j.1600-065X.2007.00563.x","article-title":"The trafficking of natural killer cells","volume":"220","author":"Gr\u00e9goire","year":"2007","journal-title":"Immunol. 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