(a) Alleles present in SMClin and
SMClin-KO mice. KO (knockout) refers to
Tcf21, lin = lineage tracing, Tg = transgene,
ΔSMC = SMC cell-specific KO (b)
Mice were maintained on chow diet from birth until 7 weeks of age, then
underwent gavage and high-fat diet (HFD) treatment. For single-cell RNAseq
(scRNAseq), RNAscope, CITE-seq, histology involving BODIPY and FACS staining
experiments (upper timeline), mice were gavaged only at 7 weeks of age,
prior to onset of HFD, as denoted by red arrows. For scRNAseq experiments,
mice were sacrificed at baseline (72 hours after initial tamoxifen gavage),
or after 8 weeks or 16 weeks of HFD. For RNAscope experiments, mice were
sacrificed after either 8 weeks or 16 weeks of HFD. For the CITE-seq
experiment, mice were sacrificed after 16 weeks of HFD. For BODIPY studies,
mice were sacrificed after 16 week of HFD. For the FACS staining experiment
two mice, one after 12 weeks HFD and another after 15 weeks HFD were used.
For quantitative histology experiments (lower timeline), mice were gavaged
at 7 weeks of age, after 8 weeks of HFD and after 16 weeks of HFD (48 hours
prior to sacrifice) as denoted by red arrows. For these quantitative
histology experiments, all mice were sacrificed after 16 weeks of HFD.
(c) Fluorescence activated cell sorting (FACS) workflow for
isolating single cells from the mouse aortic root.