Related Experiment Video
Updated: Aug 6, 2026

Using Mouse Mammary Tumor Cells to Teach Core Biology Concepts: A Simple Lab Module
Published on: June 18, 2015
Chronobiologic response modifiers and breast cancer development: classical background and chronobiologic tasks
1Chronobiology Laboratories, University of Minnesota, Minneapolis 55455.
Abstract:
Mapping the chronome's multi-frequency (about-daily, -weekly, and -yearly) neuroendocrine and immune rhythms can help determine when potential chronobiologic response modifiers (CBRMs) should be applied. Aimed at shielding in time by manipulating rhythms, CBRMs may be pertinent to all stages of carcinogenesis, from prevention to treatment, by forestalling the neuroendocrine, immunologic or cell cycle-related recurrent susceptibility peaks from getting aligned, favoring cancerous growth. Pituitary/hypothalamic isografts in the virus-free Bagg albino mouse and designs described as heterophasic allow the systematic investigation of the effect of internal shifts among neuroendocrines. Rhythm manipulation by CBRMs can then aim at lowering (breast or prostate) cancer risk by reproducing identified favorable low risk chronome configurations such as a circannual amplitude in blood that is small for TSH and large for prolactin in women and vice versa for men.
Related Concept Videos
Circadian Rhythms and Gene Regulation
mTOR Signaling and Cancer Progression
The mTOR pathway or the...
Chronopharmacokinetics: Circadian Rhythms and Influence on Drug Response
The time of drug administration is an important factor to consider, as it can influence the toxic dose of a drug. For example, a study conducted by Prins et al. in 1997 examined the effects of the timing of...
Chronopharmacokinetics: Time-Dependent Pharmacokinetics
Time-dependent pharmacokinetics refers to non-cyclical changes in drug rate processes over a period of time. It can lead to nonlinear pharmacokinetics, where the relationship between drug concentration and time is not proportional. Non-cyclical...
Cancer Survival Analysis
Aging
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...

