Diurnal Cortisol Rhythm as a Predictor of Breast Cancer Survival
Bibliographic Data
| ID | 23375674 |
|---|---|
| Authors | Sandra E Sephton (0000-0003-0585-0277, University of Louisville, corresponding author) |
| Year | 2000 |
| Volume | 92 |
| Issue | 12 |
| Pages | 994-1000 |
| Publication date | 2000-06-21 |
| Peer Reviewed | Yes |
| Open Access | No |
| Type | ARTICLE |
| Venue | CancerSpectrum Knowledge Environment (JOURNAL) |
| Journal identifiers | ISSN: 0027-8874 • E-ISSN: 1460-2105 |
| Publisher | Oxford University Press (OUP) (PUBLISHER) |
| DOI | 10.1093/jnci/92.12.994 |
| PMID | 10861311 |
| OpenAlex | W2163527944 |
| Language | EN |
| Citations received | 73 |
| References cited | 4 |
BACKGROUND: : Abnormal circadian rhythms have been observed in patients with cancer, but the prognostic value of such alterations has not been confirmed. We examined the association between diurnal variation of salivary cortisol in patients with metastatic breast cancer and subsequent survival. We explored relationships between cortisol rhythms, circulating natural killer (NK) cell counts and activity, prognostic indicators, medical treatment, and psychosocial variables. METHODS: Salivary cortisol levels of 104 patients with metastatic breast cancer were assessed at study entry at 0800, 1200, 1700, and 2100 hours on each of 3 consecutive days, and the slope of diurnal cortisol variation was calculated using a regression of log-transformed cortisol concentrations on sample collection time. NK cell numbers were measured by flow cytometry, and NK cell activity was measured by the chromium release assay. The survival analysis was conducted by the Cox proportional hazards regression model with two-sided statistical testing. RESULTS: Cortisol slope predicted subsequent survival up to 7 years later. Earlier mortality occurred among patients with relatively "flat" rhythms, indicating a lack of normal diurnal variation (Cox proportional hazards, P =. 0036). Patients with chest metastases, as opposed to those with visceral or bone metastases, had more rhythmic cortisol profiles. Flattened profiles were linked with low counts and suppressed activity of NK cells. After adjustment for each of these and other factors, the cortisol slope remained a statistically significant, independent predictor of survival time. NK cell count emerged as a secondary predictor of survival. CONCLUSIONS: Patients with metastatic breast cancer whose diurnal cortisol rhythms were flattened or abnormal had earlier mortality. Suppression of NK cell count and NK function may be a mediator or a marker of more rapid disease progression.
Breast cancer · Cancer · Circadian rhythm · Diurnal temperature variation · Hydrocortisone · Proportional hazards model · Survival analysis · Cancer-related cognitive impairment studies · Circadian rhythm and melatonin · Endocrinology · Internal Medicine · Medicine · Oncology · Physiology · Stress Responses and Cortisol
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| Unique citing works | 73 |
|---|---|
| Citations per year | 2,92 |
| Citation span | 2001 - 2025 (25) |
| Citation velocity | recent |
| Highly cited | No |
| Citation types | Neutral: 70 |