Aβ	Amyloid β
ATP	Adenosine Triphosphate
BBB	Blood–Brain Barrier
BDNF	Brain-Derived Neurotrophic Factor
CEACAM	Carcinoembryonic Antigen-related Cell Adhesion molecules
Cdt	Cytolethal Distending Toxin
CNS	Central Nervous System
CRC	Colorectal Cancer
DAMPs	Danger-Associated Molecular Patterns
ESCC	Esophageal Squamous Cell Carcinoma
FadA	Fusobacterium adhesin A
FapA	Fusobacterium outer membrane protein A
Fap2	Fusobacterium outer membrane autotransporter protein 2
FH	Factor H
GBA	Gut–Brain Axis
HNSCC	Head-Neck Squamous Cell Carcinoma
HPA	Hypoyhalamus Pituitary Adrenal
IBD	Inflammatory Bowel Disease
IEB	Intestinal Epithelial Barrier
IFN	Interferon
IL	Interleukin
LGCI	Low Grade Chronic Inflammation
LPS	Lipopolisaccharide
LSCC	Laryngeal Squamous Cell Carcinoma
LtxA	Leukotoxin A
MALT	Mucosa Associated Lymphoid Tissue
MAPK	Mitogen-Activated Protein Kinase
MPPs	Metalloproteinases
MSP	Major Sheath Protein
MurNAc	N-Acetyl Muramic Acid
NASH	Non-Alcoholic Steatohepatitis
NF-κB	Nuclear Factor Kappa-Light-Chain Enhancer of Activate B Cells
NK	Natural Killer
NLRP3	NOD-, LRR- and pyrin domain- containing protein 3
NO	Nitric Oxide
OMVs	Outer Membrane Vescicles
OPSCC	Oropharyngeal Squamous Cell Carcinoma
OSCC	Oral Squamous Cell Carcinoma
PAD	Peptidyl-Arginine Deaminase
PAMPs	Pathogen-Associated Molecular Patterns
PGE2	Prostaglandin E2
PIP2	Phosphatidylinositol 4,5 bisphosphate
PKB/AKT	Protein Kinase B
PNEI	Psycho-Neuro-Endocrine-Immunology
RadD	Radiation-sensitive DNA Adhesin
ROS	Reactive Oxygen Species
RTX	Repeats in-Toxin
SCFA	Short Chain Fatty Acid
SPF	Specific Pathogen Free
Th	T helper Lymphocyte
TIGIT	T Cells Immunoreceptors with Ig and ITIM domains
TLR2	Toll Like Receptor 2
TNF	Tumor Necrosis Factor
TR	Taste Receptor
Treg	T regulatory Lymphocyte