ANOVA	one-way analysis of variance
ASVs	amplicon sequence variants
BPD	bronchopulmonary dysplasia
BSA	bovine serum albumin
ChAT	choline acetyltransferase
CM	colonic microbiome
Crl:CD(SD)	Sprague–Dawley rats
DAPI	4′,6-diamidino-2-phenylindole
ENS	enteric nervous system
FFPE	Formalin-Fixed Paraffin-Embedded
MICCA	MICrobial Community Analysis
NEC	necrotising enterocolitis
nNOS	neuronal nitric oxide synthase
PBS	phosphate-buffered saline
PCoA	principal coordinate analysis
PERMANOVA	permutational multivariate analysis of variance
PFA	paraformaldehyde
ROP	retinopathy of prematurity
SD	standard deviation
SOX10	SRY-box transcription factor 10
β3-AR	β3-adrenergic receptor