medium-scale-preparation-drosophila-embryo-extracts-for-proteomic

Medium-scale Preparation of <em>Drosophila</em> Embryo Extracts for Proteomic Experiments

Analysis of protein-protein interactions (PPIs) has become an indispensable approach to study biological processes and mechanisms, such as cell signaling, ...

multiplex-cyclic-fluorescent-immunohistochemistry

Multiplex Cyclic Fluorescent Immunohistochemistry

The tumor microenvironment involves interactions between host cells, tumor cells, immune cells, stromal cells, and vasculature. Characterizing and ...

University Of Massachusetts Boston

The Affiliated Calmette Hospital of Kunming Medical University & The First Hospital of Kunming

Yunnan University

Bone marrow mesenchymal stem cells (BMSCs) and myeloid-derived suppressor cells (MDSCs) can be mobilized from bone marrow (BM) into blood stream and home in tumor stroma, where they either help or hinder tumor growth. The issue of whether BMSCs could affect MDSCs in ascitogenous hepatoma BALB/c mice, thus influencing their functional activity, remains unclear. In this study, we demonstrated that after transfusion into ascitogenous hepatoma BALB/c mice, the homing fraction of BMSCs in BM was 2%-5% in 24-72 h and the percentage of Gr-1+CD11b+ MDSCs was downregulated in peripheral blood (PB) and BM. Meanwhile, IFN-γ+ T lymphocytes in PB increased. As a result of such immunoregulation, BMSCs treatment caused a delayed tumor growth and a prolonged survival in H22 ascitogenous hepatoma model. Because the proliferation of H22 cells was not affected by in vitro coculture with BMSCs, this observation is likely due to a systemic suppressive effect on the host MDSCs. We also demonstrated that BMSCs inhibited the induction and proliferation of MDSCs from hematopoietic stem cells (HSCs) in an in vitro tumor conditioned medium. Thus, our findings show for the first time that BMSCs are potentially inhibitor during MDSCs induction and proliferation and that when injected intravenously into tumor bearing mice they might be effective antitumor agents suitable for cancer therapy.

Bone marrow mesenchymal stem cells suppress ascitogenous hepatoma progression in BALB/c mouse through reducing myeloid-derived suppressor cells.

While myeloid-derived suppressor cells (MDSCs) have been reported to participate in the promotion of angiogenesis and tumor growth, little is known about their presence and function during perioperative period. Here, we demonstrated that human MDSCs expressing CD11b(+), CD33(+) and HLA-DR(-) significantly increased in lung cancer patients after thoracotomy. CD11b(+) CD33(+) HLA-DR(-) MDSCs isolated 24 hr after surgery from lung cancer patients were more efficient in promoting angiogenesis and tumor growth than MDSCs isolated before surgical operation in allograft tumor model. In addition, CD11b(+) CD33(+) HLA-DR(-) MDSCs produced high levels of MMP-9. Using an experimental lung metastasis mouse model, we demonstrated that the numbers of metastases on lung surface and Gr-1(+) CD11b(+) MDSCs at postoperative period were enhanced in proportion to the degree of surgical manipulation. We also examined that syngeneic bone marrow mesenchymal stem cells (BMSCs) significantly inhibited the induction and proliferation of Gr-1(+) CD11b(+) MDSCs and further prevented lung metastasis formation in the mice undergoing laparotomy. Taken together, our results suggest that postoperatively induced MDSCs were qualified with potent proangiogenic and tumor-promotive ability and this cell population should be considered as a target for preventing postoperative tumor metastasis.

The influence of myeloid-derived suppressor cells on angiogenesis and tumor growth after cancer surgery.

Lung cancer had been leading mounts of deaths worldwide. Advances in genes microarray had helped human further understand genes and identify novel circular RNAs. This study aimed at investigating the biological functions and molecular mechanisms of hsa_circ_0046264 in lung cancer which may be helpful in lung cancer early diagnosis and clinical treatment.

ArticleTotal : 2	Year
Publication title Cited by 4	2017
Publication title Cited by 1	2024

Article	Year
Bone marrow mesenchymal stem cells suppress ascitogenous hepatoma progression in BALB/c mouse through reducing myeloid-derived suppressor cells. Bio-medical materials and engineering\| PubMed ID: 25538067	2015
The influence of myeloid-derived suppressor cells on angiogenesis and tumor growth after cancer surgery. International journal of cancer\| PubMed ID: 26756887	2016
Hsa_circ_0046264 up-regulated BRCA2 to suppress lung cancer through targeting hsa-miR-1245. Respiratory research\| PubMed ID: 29891014	2018

Liu Yang

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