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September 17, 2026Journal of drug targeting

UTMD lowers tumor fluid pressure and enhances doxorubicin and nab-paclitaxel accumulation in breast cancer models.

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Why the study?

Does ultrasound-targeted microbubble destruction reduce tumor interstitial fluid pressure and improve intratumoral distribution of chemotherapeutics in an orthotopic breast cancer model?

Population

MCF7-derived orthotopic breast cancer model

Comparison

UTMD combined with doxorubicin or nab-paclitaxel vs USMB-alone

Design

Preclinical study

Follow-up

Approximately 2 minutes after 10-minute treatment

Key result

Ultrasound-targeted microbubble destruction (UTMD) reduced tumor interstitial fluid pressure and enhanced intratumoral accumulation of doxorubicin and nab-paclitaxel in a breast cancer model.

Authors

MLMinHua LinYHYangcheng HeZXZhu Xiansheng

Discussion

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Overview

Hypothesis-generating for UTMD to enhance chemotherapy delivery in tumors; clinical translation untested.

Key Points

  • To evaluate the acute impact of ultrasound-targeted microbubble destruction on tumor interstitial fluid pressure and the intratumoral distribution of doxorubicin and nab-paclitaxel in an orthotopic breast cancer model.
  • Treated MCF7-derived orthotopic breast cancer models with a 10-minute protocol of ultrasound-targeted microbubble destruction (UTMD) alone or combined with doxorubicin or Cy5-labeled nab-paclitaxel.
  • Measured tumor interstitial fluid pressure approximately 2 minutes post-treatment, mapped drug distribution across peripheral and central tumor regions using fluorescence imaging, and evaluated vascular morphology via H&E staining.
  • UTMD produced marked acute reductions in tumor interstitial fluid pressure when administered alone as well as when combined with doxorubicin or nab-paclitaxel.
  • UTMD led to increased doxorubicin accumulation across both central and peripheral tumor regions, whereas nab-paclitaxel enhancement was confined predominantly to the tumor periphery.
  • Vascular dilation, erythrocyte extravasation, and microthrombus formation occurred after UTMD treatment, including in tumors that did not receive chemotherapy.

Structured PICO

Does ultrasound-targeted microbubble destruction reduce tumor interstitial fluid pressure and improve intratumoral distribution of chemotherapeutics in an orthotopic breast cancer model?

P
Population
MCF7-derived orthotopic breast cancer model
I
Intervention
Ultrasound-targeted microbubble destruction (UTMD) combined with doxorubicin or nab-paclitaxel (10-min treatment procedure)
C
Comparator
USMB-alone group
O
Outcome
Tumor interstitial fluid pressure (IFP) and intratumoral distribution of doxorubicin and nab-paclitaxelsurrogate

Ultrasound-targeted microbubble destruction acutely reduces tumor interstitial fluid pressure and enhances the penetration of chemotherapeutics in a breast cancer model.

Limitations

  • Direct antitumor efficacy endpoints were not evaluated.
  • Observed distribution differences should not be attributed solely to size and should not be interpreted as evidence of improved antitumor efficacy.
  • The findings should be considered specific to the present orthotopic breast cancer model.
  • Direct antitumor efficacy endpoints were not evaluated
  • Observed distribution differences should not be attributed solely to size
  • Findings should be considered specific to the present orthotopic breast cancer model

Cite This Study

Lin et al. (2026) studied Breast cancer (MCF7-derived orthotopic model). Ultrasound-targeted microbubble destruction (UTMD) was evaluated on Tumor interstitial fluid pressure (IFP) and intratumoral drug distribution. Ultrasound-targeted microbubble destruction (UTMD) reduced tumor interstitial fluid pressure and enhanced intratumoral accumulation of doxorubicin and nab-paclitaxel in a breast cancer model.

synapsesocial.com/papers/6aabb6445f706d05830e4b4chttps://doi.org/10.1080/1061186x.2026.2733604
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Low‐Power Ultrasound with Microbubbles Improve Oxygenation and Doxorubicin Uptake in Hypoxic Triple‐Negative Breast Cancer2026
  2. 2Modulating tumor interstitial fluid pressure using ultrasound and microbubble therapy: a preclinical study for enhanced drug delivery in cancer treatment2025
  3. 3Modulating tumor interstitial fluid pressure using ultrasound and microbubble therapy: a preclinical study for enhanced drug delivery in cancer treatment2025
  4. 4Effect of Ultrasound Combined with Microbubbles on Blood Perfusion in Invasive Breast Cancer—A Prospective Clinical Trial2026
  5. 5CavitoMod-UTMDNet: A Mechanistic Cavitation–Diffusion Framework for Ultrasound-Targeted Microbubble Destruction–Enhanced Liposomal Doxorubicin Delivery in Pancreatic Cancer2026