of T cells within the TME, cells were collected from the tumors on
day 10 following various treatments. This was achieved using a tumor
dissociation kit (Miltenyi Biotec, North Rhine-Westphalia, Germany)
along with a dissociator (GentleMACS, Miltenyi Biotec) to obtain single-cell
suspensions, which were then filtered through a 70 μm strainer
(Smartstrainer, Miltenyi Biotec) to eliminate larger debris. Thereafter,
the resulting single-cell suspensions underwent a blocking step with
antimouse CD16/32 antibodies (101302, 1:25, BioLegend) and were subsequently
stained with the following antibodies: APC/cyanine7- conjugated anti-CD45
(103116, 1:40, BioLegend), FITC-conjugated anti-CD3 (100204, 1:25,
BioLegend), PE-conjugated anti-CD8a (100708, 1:100, BioLegend), and
APC-conjugated anti-CD4 (100412, 1:100, BioLegend) antibodies. The
antibody staining process occurred over a period of 30 min at 4 °C,
followed by 7-AAD viability staining (420404, BioLegend). The stained
cells were then analyzed using a cell sorter (Aurora CS, Cytek Biosciences,
Fremont, CA, USA), and the data were analyzed using FlowJo Software
(Treestar, Ashland, OR, USA).