Cited by 49Immune cells in cancerNanoparticle-Based Drug DeliveryImmunotherapy and Immune Responses

Imiquimod-gemcitabine nanoparticles harness immune cells to suppress breast cancer

Singh, Bijay, Maharjan, Sushila, Pan, Daniel C., Zhao, Zongmin, Gao, Yongsheng, Zhang, Yu Shrike, Mitragotri, Samir·2022·Biomaterials

Abstract

Monotherapy with a single chemotherapeutic regimen has met with significant hurdles in terms of clinical efficacy. The complexity of cancer accentuates the need for an alternative approach with a combination of two or more therapeutic regimens to win the battle. However, it is still a challenge to develop a successful combination of drugs with high efficiency and low toxicity to control cancer growth. While gemcitabine monotherapy remains a choice of standard treatment for advanced breast cancer, the approach has not prolonged the median survival time of metastatic breast cancer patients. Here, we report a hyaluronic acid (HA)-based drug combination of gemcitabine (GEM) with imiquimod (IMQ) to stimulate immune cells for anticancer activity. Treatment of the drug combination (IMQ-HA-GEM) showed enhanced anticancer activity against 4T1 breast tumor cells in vitro. Our study with a microfluidics-based 3D, compartmentalized cancer model showed that infiltration of THP-1 monocytes occurred particularly at the site of cancer cells treated with IMQ-HA-GEM. Moreover, IMQ-HA-GEM significantly suppressed the volume of 4T1 breast tumor of mice in vivo. Flow cytometry study displayed a significantly higher activation of CD11b+ immune cells in the blood of mice treated with IMQ-HA-GEM, whereas immunohistochemistry study revealed greater prevalence of CD68+ tumor-associated macrophages in the tumor. Histological examination of isolated tumors of mice treated with IMQ-HA-GEM further confirmed the efficacy of drug combination on cancer cells. This study supports the conclusion that imiquimod potentiates the effect of gemcitabine by activating immune cells to suppress tumors in the form of combination nanoparticles.

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Crossref · 10.1016/j.biomaterials.2021.121302

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51 of 51 references verified0 citation errors · 0 not checkable

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  • A combination of gemcitabine-imiquimod based on hyaluronic acid stimulates the anticancer activity of immune cells.

    “Samir et al. have developed a combination of gemcitabine-imiquimod based on hyaluronic acid to stimulate the anticancer activity of immune cells.278”

    From Smart nanoparticles for cancer therapy (2023) · cites this paper as [278]

  • Imiquimod can enhance the therapeutic effect of gemcitabine by activating immune cells using smart nanoparticles.

    “This study fully proves that imiquimod can enhance the therapeutic effect of gemcitabine by activating immune cells using smart nanoparticles.”

    From Smart nanoparticles for cancer therapy (2023) · cites this paper as [278]

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Authors
Singh, B., Maharjan, S., Pan, D. C., Zhao, Z., Gao, Y., Zhang, Y. S., & Mitragotri, S.
Affiliations
  • Harvard University (US)
  • Brigham and Women's Hospital (US)
Corresponding author
Mitragotri, Samir
Venue
Biomaterials
Publisher
Elsevier BV
Published
2022-01
Volume
280
Pages
121302
ISSN
0142-9612 (ISSN-L)
OpenAlex
W3217690337
Cited by
49
References
51
Citations by year
2026: 10 · 2025: 8 · 2024: 10 · 2023: 13 · 2022: 8
FWCI
2.89
Type
journal article
Language
en
Open access
closed
Locations
  • Biomaterials (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Harvard University
  • Brigham Research Institute
  • National Institutes of Health (R00CA201603, R01EB028143, R21EB025270)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Immune cells in cancer
  • Physical Sciences › Materials Science › Biomaterials › Nanoparticle-Based Drug Delivery
  • Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
Keywords
imiquimod, gemcitabine, hyaluronic acid, combination therapy, nanoparticles, breast cancer, immunotherapy, tumor-associated macrophages, THP-1 cells, 4T1 cells, combination chemotherapy
MeSH terms
Imiquimod, Gemcitabine, Animals, Breast Neoplasms, Deoxycytidine, Female, Humans, Cell Line, Tumor, Mice, Nanoparticles

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