Quantifying Antibody-Dependent Cellular Cytotoxicity in a Tumor Spheroid Model: Application for Drug Discovery

Isotta Sturniolo; Csongor V&#225;r&#243;czy; &#193;kos M&#225;t&#233; Bede; Csaba Heged&#369;s; M&#225;t&#233; &#193;. Dem&#233;ny; L&#225;szl&#243; Vir&#225;g

doi:10.3791/65922

Quantificazione della citotossicità cellulare anticorpo-dipendente in un modello di sferoide tumo...

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Cancer Research
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JoVE Journal Cancer Research

Quantifying Antibody-Dependent Cellular Cytotoxicity in a Tumor Spheroid Model: Application for Drug Discovery

Quantificazione della citotossicità cellulare anticorpo-dipendente in un modello di sferoide tumorale: applicazione per la scoperta di farmaci

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13:19 min

April 26, 2024

DOI: 10.3791/65922-v

Isotta Sturniolo^1,2, Csongor Váróczy^1,3, Ákos Máté Bede^1,3, Csaba Hegedűs¹, Máté Á. Demény^1,4, László Virág^1,4

¹Department of Medical Chemistry, Faculty of Medicine,University of Debrecen, ²Doctoral School of Molecular Medicine,University of Debrecen, ³National Academy of Scientist Education, ⁴HUN-REN-DE Cell Biology and Signaling Research Group

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Overview

This study presents a method to identify compounds that modulate the ADCC mechanism, crucial for the efficacy of antitumor antibodies like trastuzumab. The cytotoxic effect of NK cells is assessed in breast cancer cell spheroids, allowing for detailed image analysis of live and dead cells.

Key Study Components

Area of Science

Oncology
Immunology
Cell Biology

Background

Trastuzumab is an effective targeted therapy for HER2-positive breast cancer.
ADCC is a key mechanism through which trastuzumab exerts its anti-cancer effects.
3D cancer cell spheroids provide a more accurate model for studying tumor responses to therapies.
Natural killer (NK) cells play a vital role in mediating ADCC.

Purpose of Study

To develop a model for studying ADCC in breast cancer.
To evaluate the effectiveness of trastuzumab in inducing NK cell-mediated cytotoxicity.
To enhance understanding of the interactions between NK cells and cancer cells.

Methods Used

Creation of 3D spheroid models using JIMT-1 breast carcinoma cells.
Utilization of NK92 natural killer cell line for cytotoxicity assays.
Image analysis to quantify live and dead cells within spheroids.
Assessment of the impact of trastuzumab on NK cell activity.

Main Results

Trastuzumab effectively enhances NK cell-mediated cytotoxicity against breast cancer spheroids.
Image analysis provides clear differentiation between live and dead cells.
The 3D spheroid model accurately reflects the tumor microenvironment.
Findings support the potential for improving antibody-based therapies.

Conclusions

The study successfully demonstrates a novel approach to evaluate ADCC in a 3D model.
Results highlight the importance of NK cells in the efficacy of trastuzumab.
This model can be used for future research on enhancing cancer immunotherapies.

Frequently Asked Questions

What is ADCC?

ADCC stands for antibody-dependent cell-mediated cytotoxicity, a mechanism by which immune cells kill cancer cells that are bound by antibodies.

Why are 3D spheroids used in cancer research?

3D spheroids better mimic the tumor microenvironment, allowing for more accurate studies of drug responses and immune interactions.

How does trastuzumab work?

Trastuzumab targets the HER2 receptor on cancer cells, marking them for destruction by the immune system, particularly through ADCC.

What role do NK cells play in cancer therapy?

Natural killer (NK) cells are crucial for recognizing and killing cancer cells, especially in the presence of therapeutic antibodies.

What are the implications of this study?

The findings could lead to improved strategies for enhancing the effectiveness of antibody-based cancer therapies.

Qui, presentiamo un metodo per identificare i composti che modulano il meccanismo ADCC, un importante meccanismo di uccisione delle cellule tumorali degli anticorpi antitumorali. L'effetto citotossico delle cellule NK è misurato negli sferoidi delle cellule del cancro al seno in presenza di Trastuzumab. L'analisi delle immagini identifica le cellule killer vive e morte e le cellule bersaglio negli sferoidi.

Una delle terapie antitumorali mirate più efficaci si basa su anticorpi come l'anticorpo anti-HER2 trastuzumab. L'azione antitumorale del trastuzumab coinvolge la citotossicità cellulo-mediata anticorpo-dipendente, ADCC, da parte di cellule natural killer o NK. La comprensione dei meccanismi che regolano la sensibilità delle cellule tumorali alla terapia con anticorpi anti-recettori del fattore di crescita, con particolare riguardo all'ADCC, potrebbe essere cruciale per lo sviluppo di nuove e più efficienti modalità di trattamento.

I modelli 3D come gli sferoidi delle cellule tumorali si sono dimostrati superiori nel predire le risposte immunitarie dei tumori a varie terapie antitumorali. Pertanto, abbiamo creato un modello di sferoide ADCC utilizzando la linea cellulare natural killer NK92, cellule di carcinoma mammario JIMT-1 che esprimono GFP e trastuzumab. Abbiamo impostato il sistema di dosaggio ADCC inducendo le cellule di carcinoma mammario JIMT-1 anti-HER2-positive a formare cluster tridimensionali chiamati sferoidi.

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