<?xml version="1.0" encoding="US-ASCII"?>
<!-- Generated by Broadridge Transform (tm) - http://www.broadridge.com -->
<!-- Created: Thu Apr 23 20:40:49 UTC 2026 -->
<linkbase xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <labelLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:type="extended">
    <loc xlink:type="locator" xlink:label="nktx_NadirMahmoodMember" xlink:href="nktx-20260610.xsd#nktx_NadirMahmoodMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nktx_NadirMahmoodMember_lbl" xml:lang="en-US">Nadir Mahmood [Member]</label>
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nktx_NadirMahmoodMember" xlink:to="nktx_NadirMahmoodMember_lbl"/>
    <loc xlink:type="locator" xlink:label="nktx_PaulHastingsMember" xlink:href="nktx-20260610.xsd#nktx_PaulHastingsMember"/>
    <label xlink:type="resource" xlink:role="http://www.xbrl.org/2003/role/label" xlink:label="nktx_PaulHastingsMember_lbl" xml:lang="en-US">Paul Hastings [Member]</label>
<!-- [WMV7][NKlA8TKn6YhfLfKpI2MNlmftasG/xTwmFsf+BuBLS7Y2ZMTep8MbjSACDMxwj5xtuxyLCV1+WN+A3+xwRAfQm+UTEn2rp+CKXCpDX3OsNBadaSQnwkED2sifMWP2bDIZOv8/TfTzDXoyh100DiKO43B3JIBwGNDeHoh9QADcl8+sbPrnQLymOX6wWLZJJyp5kpIcHiaIA7AXdr0UkV7t+g0Kr5VEqESgFMpfFjwihyCZRCnQNuojTahHggtKCucUtkvpLGMMx+yt/8hpyq7sBTxdAcXNU5Fb6adnktAM6ovc07DVDaMCtITLwo4jlvAcFDCL7B/C8zf5llI/W7P7bqY08pzYBGdGF085YqIAgEk=] CSR-->
    <labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="nktx_PaulHastingsMember" xlink:to="nktx_PaulHastingsMember_lbl"/>
  </labelLink>
</linkbase>
