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Natural killer cell activated by attenuated newcastle disease virus (NDV) as anti-cancer therapy
Noor N Al-Hayani1, Marwa I Salman2, Ahmed Majeed Al-Shammari3
1College of Medicine, University of Anbar, Ramadi, Iraq.
Background:
Natural Killer (NK) cells play a central role in innate immunity by targeting virally infected and malignant cells without prior sensitization. However, their activity is often suppressed within the tumor microenvironment. Oncolytic viruses such as Newcastle Disease Virus (NDV) not only selectively replicate in tumor cells but also stimulate immune responses, particularly NK cell activation. Combining attenuated NDV with NK cell therapy may therefore enhance anti-tumor efficacy.
Aim:
This study aimed to investigate the synergistic anti-cancer potential of NK cells activated by attenuated NDV against breast cancer cell lines AMJ13 and MCF-7, with emphasis on cytotoxicity, adhesion, and immunophenotypic changes.
Methods:
NK cells were isolated from peripheral blood using separation media and 8 µm mesh filtration, followed by expansion in culture with interleukin-15 (IL-15). Immunofluorescence assays were performed to characterize these NK cells by immunophenotyping through detection of CD3, CD16, Cd56 and CD57 expressions. Co-cytotoxicity was evaluated by WST assay in AMJ13 and MCF-7 cells exposed to NK cells, NDV, or the combination. NK adhesion to tumor cells was assessed by light microscope, scanning electron microscopy (SEM) and immunofluorescence by CD56 detection. Statistical analysis was conducted using GraphPad Prism, and combination effects were analyzed by CompuSyn software.
Results:
NK cells expanded effectively in IL-15-supplemented culture and displayed enhanced cytotoxicity when combined with NDV, leading to significantly reduced viability in both AMJ13 and MCF-7 cells compared with single treatments (p < 0.05). light and SEM analyses demonstrated NK cell adhesion, morphological alterations, and surface disruption of tumor cells. Immunofluorescence confirmed increased expression of NK marker (CD56) combination in treated groups, supporting functional enhance attachemtn of NK cells.
Conclusion:
Attenuated NDV significantly augments NK cell-mediated cytotoxicity and adhesion against breast cancer cells. This combinatorial approach offers a promising immunotherapeutic strategy, highlighting the potential of integrating oncolytic virotherapy with NK cell-based therapy for cancer treatment.
Insights
Newcastle Disease Virus (NDV) combined with Natural Killer (NK) cells enhances anti-cancer effects against breast cancer. This combination boosts NK cell activity, improving tumor cell killing and adhesion for a promising cancer immunotherapy strategy.
Area of Science:
- Immunology
- Oncology
- Virology
Background:
- Natural Killer (NK) cells are crucial for innate immunity, targeting cancer cells but often suppressed in the tumor microenvironment.
- Oncolytic viruses like Newcastle Disease Virus (NDV) can stimulate immune responses, including NK cell activation.
- Combining NDV with NK cell therapy presents a potential strategy to overcome tumor-induced immunosuppression and enhance anti-tumor efficacy.
Purpose of the Study:
- To investigate the synergistic anti-cancer effects of attenuated NDV-activated NK cells against breast cancer cell lines (AMJ13 and MCF-7).
- To evaluate the impact of this combination therapy on NK cell cytotoxicity, adhesion, and immunophenotypic changes in breast cancer models.
Main Methods:
- NK cells were isolated, expanded using interleukin-15 (IL-15), and immunophenotyped.
- Co-cytotoxicity was assessed using WST assays.
- NK cell adhesion to tumor cells was evaluated via light microscopy, SEM, and immunofluorescence.
- Combination effects were analyzed using CompuSyn software.
Main Results:
- IL-15 expanded NK cells showed enhanced cytotoxicity when combined with NDV, significantly reducing breast cancer cell viability.
- NDV-activated NK cells demonstrated increased adhesion to tumor cells, with observed morphological alterations and surface disruption.
- Immunofluorescence confirmed increased expression of the NK marker CD56 in the combination treatment group.
Conclusions:
- Attenuated NDV significantly enhances NK cell-mediated cytotoxicity and adhesion against breast cancer cells.
- The combination of NDV and NK cell therapy represents a promising immunotherapeutic strategy for cancer treatment.
- Integrating oncolytic virotherapy with NK cell-based therapy holds potential for improved cancer treatment outcomes.
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