Gastric cancer (GC), being one of the most common malignant human tumors,
occupies the second position in the structure of mortality in men and women.
High rates of morbidity and mortality in this pathology determine its extremely
high clinical and social significance. Diagnosis and timely treatment of
precancerous pathology is the main way to reduce morbidity and mortality,
and early detection of GC and its adequate treatment improve prognosis. The
ability to accurately predict the development of GC and start treatment on time, as
well as the ability to determine the stage of the disease if the diagnosis is confirmed
- non-invasive biomarkers can become the key to solving these and many other
problems of modern medicine. One of the promising biomarkers being studied
are non-coding RNAs, namely, misroRNAs (miRNAs), long non-coding RNAs
(lncRNAs), and circular RNAs (circRNAs). They are involved in a wide range of
processes, including apoptosis, proliferation, differentiation, angiogenesis, which
play a critical role in the development of GC oncogenesis. In addition, they are
quite specific and stable due to their carriers (extracellular vesicles or Argonaute
2 protein) and can be detected in various human biological fluids, in particular
gastric juice. Thus, miRNAs, lncRNAs, and circRNAs isolated from the gastric juice
of GC patients are promising preventive, diagnostic and prognostic non-invasive
biomarkers. This review article presents the characteristics of circulating or
extracellular miRNAs, lncRNAs, and circRNAs in gastric juice, allowing their use
in the GC preventive, diagnosis, prognosis and monitoring therapy