Oops, you're using an old version of your browser so some of the features on this page may not be displaying properly.

MINIMAL Requirements: Google Chrome 24+Mozilla Firefox 20+Internet Explorer 11Opera 15–18Apple Safari 7SeaMonkey 2.15-2.23

Parameters of local cellular immunity in metastatic gastric cancer

Date

29 Sep 2019

Session

Poster Display session 2

Presenters

Aleksandr Sagakyants

Citation

Annals of Oncology (2019) 30 (suppl_5): v253-v324. 10.1093/annonc/mdz247

Authors

A.B. Sagakyants1, O.I. Kit2, N.S. Samoylenko1, I.A. Novikova2, E.Y. Zlatnik1, E.M. Frantsiyants3, E.S. Bondarenko1, L.Y. Vladimirova4

Author affiliations

  • 1 Laboratory Of Immunophenotyping Of Tumors, Rostov Research Institute of Oncology, 344037 - Rostov-on-Don/RU
  • 2 Administration, Rostov Research Institute of Oncology, 344037 - Rostov-on-Don/RU
  • 3 Laboratory Of Study Of Malignant Tumor Pathogenesis, Rostov Research Institute of Oncology, 344037 - Rostov-on-Don/RU
  • 4 Medical Department, Rostov Research Institute of Oncology, 344037 - Rostov-on-Don/RU
More

Resources

Background

A special role in the tumour progression is played by heterogeneous components of the microenvironment of tumours, premetastatic tumour niches, influencing which seems likely to change the disease course. Our purpose was to analyze some characteristics of the local cellular immunity in metastatic GC.

Methods

33 GC patients aged 30-80 years were divided into 2 groups: group 1 – M0, non-metastatic GC, n = 17, mean age 61.7±8.9 years (G2 – 11, G3 – 6 patients); group 2 – M1, GC with peritoneal and omentum metastases, n = 16, mean age 58.7±11.5 years (G2 – 7, G3 – 5, G4 - 3 patients). Tumours (T), peritumoral tissues (PT), omentum (O) and peritoneum (P) tissues were studied. Lymphocytes were determined by flow cytometry using FACSCantoII (BD) and T-, B-, NK antibody panels; quantitative content of DN (CD3+CD4-CD8-), DP (CD3+CD4+CD8+) T lymphocytes and regulatory (T-regs) T cells (CD4+CD25+CD127dim) was studied.

Results

Patients with M1 GC demonstrated increased CD3+ lymphocytic infiltration of T, PT, O and P tissues. IRI in M1 O was significantly higher than in M0 (1.95±0.3 vs 0.7±0.2), being similar in other tissues. Levels of DN lymphocytes were lower in O of M1, compared to M0 (7.7±2.5 vs 15.7±5.6, p ≤ 0.05). Contents of NK cells, NKT lymphocytes significantly decreased in O of M1 patients, compared to M0 (3.3≤1.1 vs 14.0≤2.3 and 1.7±0.5 vs 3.8±0.8, respectively). Higher levels of NKT lymphocytes were registered in M1 PT, compared to M0 (3.3±1.1 vs 1.3±0.4), as well as lower levels of NK cells in T (2.3±0.9 vs 5.33±0.2). Percentage of Treg lymphocytes in P and O were significantly lower in M1 than in M0 (respectively, 6.9±1.5 vs 12.6±4.9 and 5.9±1.3 vs 12.6±4.9). Higher amount of B lymphocytes was registered in all tissues of M1 patients, compared to M0, maximal in O (13.1±3.3 vs 3.4±1.5), T (23.5±5.1 vs 17.2±2.3) and P (8.2±3.4 vs 3.5±1.2), while in PT it was lower (15.7±4.2 vs 43.7±4.5).

Conclusions

GC metastasis to the omentum and peritoneum is characterized by a change in their immunological features – a decrease in the tissue level of NK and NKT lymphocytes, a loss in the prevalence of CD3+CD8+ due to an increase in the number of CD3+CD4+ cells, and an increase in the level of CD19 + (B2) lymphocytes. This probably contributes to the appearance of metastatic lesions in these organs in gastric cancer.

Clinical trial identification

Editorial acknowledgement

Legal entity responsible for the study

The authors.

Funding

Has not received any funding.

Disclosure

All authors have declared no conflicts of interest.

Resources from the same session

This site uses cookies. Some of these cookies are essential, while others help us improve your experience by providing insights into how the site is being used.

For more detailed information on the cookies we use, please check our Privacy Policy.

Customise settings