Navigation Links
Chemotherapy Linked to Sleep-Wake Cycle Disruptions
Date:9/1/2009

Biological clock out of sync in patients being treated for breast cancer, study finds

TUESDAY, Sept. 1 (HealthDay News) -- New research suggests that chemotherapy in breast cancer patients disrupts cycles of sleep and wakefulness, and continued treatment leads to worse and more lasting problems.

In the study, researchers recruited 95 women with breast cancer who were scheduled to receive chemotherapy. Their average age was 51.

During the first week of chemotherapy, the women took longer to get to high activity levels after waking. They also decreased their activity levels earlier at night. This pattern continued in the first week of the fourth cycle of chemotherapy, according to the report published in the Sept. 1 issue of Sleep.

"Results of this study suggest that our biological clocks are affected by chemotherapy," said study principal investigator Sonia Ancoli-Israel, a professor of psychiatry at the University of California at San Diego, in a news release from the American Academy of Sleep Medicine. "During chemotherapy, our biological clock gets out of sync, especially after the first cycle of treatment. The clock seems to regulate itself after only one cycle, but with repeated administration of chemotherapy, it becomes more difficult for the biological clock to readjust."

According to the news release, 30 percent to 50 percent of cancer patients report insomnia.

It's not clear, however, why chemotherapy disrupts biological clocks. Psychological factors such as stress and depression could play a role, as could more napping during the day and decreased levels of estrogen, among other factors, the study authors noted.

More information

To learn about sleep problems, try the National Sleep Foundation.



-- Randy Dotinga



SOURCE: American Academy of Sleep Medicine, news release, Sept. 1, 2009


'/>"/>
Copyright©2009 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. Chemotherapy for breast cancer is associated with disruption of sleep-wake rhythm in women
2. JNCI news brief: Melanosome dynamics and sensitivity of melanoma cells to chemotherapy
3. JNCI news brief: Antibody linked to chemotherapy drug inhibits ovarian cancer in lab
4. Oral Chemotherapy Offers Patients a More Convenient, Less Invasive Treatment Option
5. Life after chemotherapy: Daily tasks, quality of life may be affected, MU researcher finds
6. Nexavar in Combination with Chemotherapy Shown to Extend Progression-Free Survival in Patients with Advanced Breast Cancer
7. Fluorescent probes may permit monitoring of chemotherapy effectiveness, Stanford study shows
8. Elderly breast cancer patients receive chemotherapy if treated in private practices
9. UCF researchers nanoparticles could someday lead to end of chemotherapy
10. New Data Support Use of Simple Test to Predict Endometrial Cancer Response to Chemotherapy
11. Chemotherapy combination outcomes differ for aged, younger colon cancer patients
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Chemotherapy Linked to Sleep-Wake Cycle Disruptions
(Date:6/26/2016)... ... June 27, 2016 , ... Quality metrics are proliferating in cancer ... they remain in the eye of the beholder, according to experts who offered insights ... American Journal of Managed Care. For the full issue, click here . , ...
(Date:6/26/2016)... ... June 26, 2016 , ... Pixel Film Studios Released ProSlice ... "Film editors can give their videos a whole new perspective by using the ... of Pixel Film Studios. , ProSlice Levels contains over 30 Different presets to ...
(Date:6/26/2016)... ... ... Kasmer, a legally blind and certified personal trainer is helping to develop a weight loss ... plans to fix the two major problems leading the fitness industry today:, ... , They don’t eliminate all the reasons people quit their exercise program ...
(Date:6/25/2016)... ... June 25, 2016 , ... Experts from the ... AcademyHealth’s Annual Research Meeting June 26-28, 2016, at the Hynes Convention Center in ... topics including advance care planning, healthcare costs and patient and family engagement. , ...
(Date:6/25/2016)... ... , ... The temporary closing of Bruton Memorial Library on June 21 due to a possible ... often overlooked aspect of head lice: the parasite’s ability to live away from a human ... but a necessary one in the event that lice have simply gotten out of control. ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... Pa. , June 23, 2016 Bracket ... will launch its next generation clinical outcomes platform, Bracket eCOA ... Meeting held on June 26 – 30, 2016 in ... the first electronic Clinical Outcome Assessment product of its kind ... Booth #715. Bracket eCOA 6.0 is a flexible ...
(Date:6/23/2016)... announced the establishment of Astellas Farma Colombia (AFC), a new affiliate with operations headquartered in Bogota. Colombia ... ... ... ... Astellas is a pharmaceutical ...
(Date:6/23/2016)... , June 23, 2016 The vast ... an outpatient dialysis facility.  Treatments are usually 3 times ... hours per visit, including travel time, equipment preparation and ... patient, but especially grueling for patients who are elderly ... a skilled nursing and rehabilitation centers for some duration ...
Breaking Medicine Technology: