Navigation Links
Circadian clocks in a blind fish
Date:9/6/2011

pecies when they were exposed to a light-dark cycle. While they obtained evidence for a robust circadian clock in the zebrafish that was synchronized with the light cycle, no rhythmicity was detected in the cavefish. However, in a comparable study where both fish were exposed to an alternative timing signal, a regular feeding time, both zebrafish and cavefish displayed circadian clock rhythmicity. Thus, they concluded that the cavefish still has a clock that can be regulated by feeding behaviour, but which cannot be reset by light. In a more detailed study, they were able to show that the cavefish retains a clock that ticks with an abnormally long period. Strikingly, they also found that the lack of its resetting by light is not due to eye loss in this fish; instead, mutations in two widely expressed opsin photoreceptors leave the clocks in most tissues unable to respond to light.

"This work holds great importance for two major fields of interest," explains Nicholas Foulkes, another co-author of the study. "First, it provides a fascinating new insight into how evolution in constant darkness affects animal physiology. While most detailed molecular studies of cavefish have focused on the mechanisms underlying eye loss, very little is known about other, broader adaptations to life without sunlight. Second, this work provides the first genetic evidence for the identity of the widely expressed photoreceptors in fish. This study sets the stage for a more complete understanding of how clocks respond to their environment."


'/>"/>

Contact: Bryan Ghosh
bghosh@plos.org
44-122-344-2837
Public Library of Science
Source:Eurekalert

Page: 1 2

Related biology news :

1. Manipulating plants circadian clock may make all-season crops possible
2. A sleep strategy commonly used by night nurses throws off their circadian clocks
3. Circadian rhythms spark plants ability to survive freezing weather
4. UNC scientists pinpoint link between light signal and circadian rhythms
5. Circadian rhythms: Their role and dysfunction in affective disorder
6. Light, circadian rhythms affect vast range of physiological, behavioral functions
7. Texas A&M researchers find new mechanism for circadian rhythm
8. MicroRNAs grease the cells circadian clockwork
9. Two new studies on circadian rhythms
10. UNC study: Tinkering with the circadian clock can suppress cancer growth
11. Circadian clock may be critical for remembering what you learn, Stanford researchers say
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/22/2014)... robots could be much more useful in homes, if ... usually see the world with cameras and lasers, which ... that are hidden in clutter. A complementary way robots ... use of small ultra-high frequency radio-frequency identification (UHF RFID) ... allowing an RFID-equipped robot to search a room for ...
(Date:9/22/2014)... 2014 NXT-ID, Inc. (NASDAQ: NXTD ... mobile commerce market, issues the following corporate shareholder update ... Letter from the CEO : ... funding and joined the NASDAQ to support ramping of ... biometric and authentication products and services. This strategic achievement positions ...
(Date:9/21/2014)... September 22, 2014The story of cowpea (black-eyed peas) is ... world,s biggest problemseven more fascinating is the story of ... wrote Cowpea: The Food Legume of the 21st Century ... management, and use. The book was recently published by ... International Institute of Tropical Agriculture (IITA). , Singh has ...
Breaking Biology News(10 mins):New RFID technology helps robots find household objects 2New RFID technology helps robots find household objects 3NXT-ID Issues Shareholder Corporate Update 2NXT-ID Issues Shareholder Corporate Update 3NXT-ID Issues Shareholder Corporate Update 4
... Bellvitge Biomedical Research Institute (IDIBELL) have shown that breast ... higher level of the protein peroxiredoxin 2 (PRDX2). The ... this protein could be a new therapeutic strategy to ... in the online edition of the journal Oncogene ...
... Researchers have gained new insight into why 22% ... a folate concentration considered optimal for reducing the risk of ... of folate deficiency in the general Canadian population. When ... reason why some women are not achieving levels optimal for ...
... April 10, 2012 The neighborhoods in which children and ... whether or not they eat a healthy diet, get enough ... a special theme issue of the American Journal of ... uses the latest concepts and methods in geographic information systems ...
Cached Biology News:Geographic information systems demonstrate links between health and location 2
(Date:9/19/2014)... use light, rather than electricity, to move data ... efficiency is a growing concern as chips, transistor ... of optical circuits light emitters, modulators, and ... One promising light source for optical chips is ... when deposited as a single, atom-thick layer. Other ...
(Date:9/19/2014)... , September 19, 2014 ... technology, development of emerging drug systems and advanced Laboratory ... Dickinson and Company (NYSE: BDX ), Thermo ... Biosciences Inc. (NASDAQ: RGDO ), Sangamo Biosciences ... (NASDAQ: HOLX) Pressure BioSciences, Inc. (OTCQB: PBIO) ...
(Date:9/19/2014)... 2014 BioTech News Coverage: Progress ... results of studies and trials.  Companies in focus are: ... LLY ), Gilead Sciences Inc. (NASDAQ: ... ) and Arena Pharmaceuticals Inc. (NASDAQ: ARNA) ... therapeutics for the treatment of cancer, announced that the ...
(Date:9/19/2014)... 2014 Dublin ... has announced the addition of the  "Micro Market ... their offering.       (Logo: http://photos.prnewswire.com/prnh/20130307/600769) , ... the fastest-growing segments in the chromatography market. The ... and expected to reach $2.0 billion by 2019, ...
Breaking Biology Technology:Toward optical chips 2Toward optical chips 3Medical Instrumentation Automation Advances for Biological Sample Preparation - Company Expects Q4 Revenue Impact from Newest Instrument Systems 2Medical Instrumentation Automation Advances for Biological Sample Preparation - Company Expects Q4 Revenue Impact from Newest Instrument Systems 3Medical Instrumentation Automation Advances for Biological Sample Preparation - Company Expects Q4 Revenue Impact from Newest Instrument Systems 4Medical Instrumentation Automation Advances for Biological Sample Preparation - Company Expects Q4 Revenue Impact from Newest Instrument Systems 5Medical Instrumentation Automation Advances for Biological Sample Preparation - Company Expects Q4 Revenue Impact from Newest Instrument Systems 6Medical Instrumentation Automation Advances for Biological Sample Preparation - Company Expects Q4 Revenue Impact from Newest Instrument Systems 7Biotech Companies Pushing Sector Higher With Recent Therapeutic Advancements & Patent Approvals - Company Wins Summary Judgment For Prodrug Patent 2Biotech Companies Pushing Sector Higher With Recent Therapeutic Advancements & Patent Approvals - Company Wins Summary Judgment For Prodrug Patent 3Biotech Companies Pushing Sector Higher With Recent Therapeutic Advancements & Patent Approvals - Company Wins Summary Judgment For Prodrug Patent 4Biotech Companies Pushing Sector Higher With Recent Therapeutic Advancements & Patent Approvals - Company Wins Summary Judgment For Prodrug Patent 5Biotech Companies Pushing Sector Higher With Recent Therapeutic Advancements & Patent Approvals - Company Wins Summary Judgment For Prodrug Patent 6Biotech Companies Pushing Sector Higher With Recent Therapeutic Advancements & Patent Approvals - Company Wins Summary Judgment For Prodrug Patent 7Micro Market Monitor : Global Pre-packed Chromatography Columns 2
... Council has teamed with JobSightUSA , a top-ranked ... match job seekers with positions based on specific "skill ... that are considering locating or expanding in Wisconsin to ... Wisconsinite workers who may wish to return to the ...
... plugs, cut the cords, and can the cables as we ... for all the freedom and mobility, we are nowhere without ... the like. That fact alone has turned the average business ... most obscure corner of airports and coffee houses. Indeed, Im ...
... 2004, the New Venture Center at the Fitchburg ... in its first phase. , ,Ground-breaking will be held on ... tenant is another nanotech company, Imago Scientific . When it ... to staff up to 71 over the next eight months. , ...
Cached Biology Technology:Power for the people 2Fitchburg Technology Campus attracts nanotechnology firms 2
... is the complete enterprise microarray informatics platform for ... Buy Acuity once and use it forever without ... for Quality Acuity has all the analysis ... your data, from quality control statistics and normalization, ...
... workstation offers precise 96 and 384-well transfers ... 100ul and 200ul disposable tips, the 96 ... and precision across a volume range from ... two positions that enable indexing into 384 ...
... ideal instrument for budget-conscious labs that want to ... Get Applied Biosystems proven PCR performance at ... without sacrificing results. Enhance productivity with ... Can Afford The Applied Biosystems 2720 ...
... to Salmonella typhimurium The genus Salmonella is ... is composed of Gram-negative bacilli that are facultative ... the "H" or flagellar antigen (phase 1 & ... the LPS moiety) and the "Vi" or capsular ...
Biology Products: