| BHMT | betaine-homocysteine S-methyltransferase |
| BBB | blood brain barrier |
| CBS | cystathionine β-synthase |
| CKD | chronic kidney disease |
| CNS | central nervous system |
| CoA | coenzyme A |
| CSE | cystathionine γ-lyase |
| CVD | cardiovascular diseases |
| Cys | cysteine |
| DNMT1 | DNA methyltransferase 1 |
| GAMT | guanidine-acetate N-methyltransferase |
| ERK | extracellular signal-regulated kinase |
| GNMT | glycine N-methyltransferase |
| Hcy | homocysteine |
| Hcy-TL | homocysteine-thiolactone |
| HDL | high-density lipoprotein |
| hHcy | hyperhomocysteinemia |
| LDL | low-density lipoprotein |
| MAPK | mitogen-activated protein kinase |
| Met | methionine |
| MMP | matrix metalloproteinase |
| MS | methionine synthase |
| MT | methyltransferase |
| MTHFR | N-5,10-methylene tetrahydrofolate reductase |
| NADPH | nicotinamide adenine dinucleotide phosphate |
| NMDA | N-methyl-d-aspartate receptor |
| PEMT | phosphatidylethanolamine N-methyltransferase |
| SAH | S-adenosyl-l-homocysteine |
| SAM | S-adenosyl-l-methionine |
| Ser | serine |
| tHcy | total homocysteine |
| TIMP | tissue inhibitor of metalloproteinase |
| THF | tetrahydrofolate |