Study finds that diabetes may hasten breast cancer tumor growth and stiffness

Study finds that diabetes may hasten breast cancer tumor growth and stiffness
Hyperglycemia increases tumor growth through promoting cell proliferation. (A) Weekly average tumor volume measurements for nondiabetic (Ctrl), diabetic (STZ), and diabetic mice treated with insulin (STZ + insulin) from when tumors become palpable and large enough for caliper measurements (week 9) to study endpoint (Ctrl, N = 14; STZ, N = 12; STZ + insulin, N = 3). (B) Average tumor volume for control (Ctrl), diabetic (STZ), and diabetic mice treated with insulin (STZ + insulin) at study endpoint (Ctrl, N = 7 and n = 22; STZ, N = 13 and n = 75; STZ + insulin, N = 3 and n = 12). (C) Average tumor burden per mouse for control (Ctrl), diabetic (STZ), and diabetic mice treated with insulin (STZ + insulin) at study endpoint (Ctrl, N = 7; STZ, N = 22; STZ + insulin, N = 3). (D) Tumor differentiation grading of tumors extracted from control group and mice treated with STZ (N = 3 and n = 3). (E) Representative images showing Ki67 and nucleus colocalization within nondiabetic, diabetic (STZ), and diabetic tumors treated with insulin (STZ + insulin). (F) Corresponding quantification of the percentage of cells with Ki67+ nuclei (Ctrl, N = 7 = 3 and n = 3, 21 imaging fields; STZ, N = 4 and n = 6, 67 imaging fields; STZ + insulin, N = 3 and n = 8, 80 imaging fields included). Data are presented as means ± SEM. *P < 0.05, ***P < 0.001, and ****P < 0.0001. DAPI, 4′,6-diamidino-2-phenylindole. Credit: Science Advances (2022). DOI: 10.1126/sciadv.abo1673

While diabetes is already associated with an increased risk of developing breast cancer, a new Vanderbilt study published in Science Advances on November 18 indicates that presence of the disease may increase tumor growth and stiffness.

Researchers also found that diabetes treatments could reduce the tumor growth and stiffness to levels comparable with non-diabetic ones. The research was led by Cynthia Reinhart-King, Cornelius Vanderbilt Professor of Engineering and University Distinguished Professor. Vanderbilt Ph.D. student Wenjun Wang, a current member of Reinhart-King's cellular mechanics lab, and Lauren Hapach, Ph.D.'21, a former lab member, were co-authors.

The study sheds light on a previously unknown biomechanical mechanism in which diabetic hyperglycemia acts on the —a molecular network that promotes the growth of cells—to accelerate and stiffness in .

The research offers potential evidence for future therapies targeted to diabetic cancer patients.

More information: Wenjun Wang et al, Diabetic hyperglycemia promotes primary tumor progression through glycation-induced tumor extracellular matrix stiffening, Science Advances (2022). DOI: 10.1126/sciadv.abo1673

Journal information: Science Advances
Citation: Study finds that diabetes may hasten breast cancer tumor growth and stiffness (2022, November 21) retrieved 20 June 2024 from https://medicalxpress.com/news/2022-11-diabetes-hasten-breast-cancer-tumor.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.

Explore further

Ionizing radiation found to soften tumor cell microenvironment

16 shares

Feedback to editors