Navigation Links
Feces fossils yield new insights into ancient diets and 'thrifty genes'
Date:7/24/2012

Scientists have long speculated that high diabetes rates among Native Americans may have roots in the evolutionary past. "Thrifty" genes that helped ancient hunter-gatherers store fat for survival during famine may contribute to diabetes in modern times of plenty.

But a new analysis of fossil feces from an Arizona cave suggests that the evolution of thrifty genes had little to do with famine and much more to do with the nature of the ancient feast. The research, reported in the August issue of Current Anthropology, shows that prehistoric hunter-gatherers in the Southwest lived on a diet remarkably high in fiber, low in fat, and consisting largely of foods with extremely low glycemic indices. That diet alone, the researchers say, could have been enough to fix fat-hoarding genes in place.

"What we're saying is we don't really need to look to feast or famine as a basis for thrifty genes," said Karl Reinhard, an archaeologist at the University of Nebraska-Lincoln and one the study's authors.

Native Americans have some of the highest rates of type 2 diabetes of any ethnic group. In some populations, up to half of adults suffer from the disease. The idea that this prevalence might be tied to ancient cycles of feast and famine first emerged in the 1960s and has been debated ever since.

"To understand the basis of these high rates of diabetes, one has to look at the best dietary data one can find," Reinhard said. "That comes from coprolites," the technical term for fossil dung. "By looking at coprolites we're seeing exactly what people ate."

Over the years, Keith Johnson, an archaeologist at California State University, Chico, directed excavations at Antelope Cave. Johnson and other archaeologists have collected nearly 200 coprolites from Antelope Cave, a deep cavern located in northern Arizona, just across the border from St. George, Utah. For as long as 4,000 years, the cave has been host to people from various c
'/>"/>

Contact: Kevin Stacey
kstacey@press.uchicago.edu
401-284-3878
University of Chicago Press Journals
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Expedition to undersea mountain yields new information about sub-seafloor structure
2. Fine-scale analysis of the human brain yields insight into its distinctive composition
3. Strip-till improves soybean yield
4. ORNL microscopy yields first proof of ferroelectricity in simplest amino acid
5. Chemical engineers at UMass Amherst find high-yield method of making xylene from biomass
6. New screening technique yields elusive compounds to block immune-regulating enzyme
7. Discovery of plant proteins may boost agricultural yields and biofuel production
8. New drug-screening method yields long-sought anti-HIV compounds
9. Summer camp yields innovative apps
10. War-related climate change would reduce substantially reduce crop yields
11. Amniotic fluid yields alternatives to embryonic stem cells
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/19/2014)... access in India over the last 30 years ... emissions growth during that time, according to a ... Climate Change ., "Energy access is fundamental to ... life, including education, communication, and health," says IIASA ... While increased energy access is widely agreed to ...
(Date:10/18/2014)... patients referred for evaluation of suspected genetic conditions, ... 25 percent, including detection of a number of ... disease, according to a study appearing in ... coincide with the American Society of Human Genetics ... or coding regions of thousands of genes simultaneously ...
(Date:10/17/2014)... – Accurate knowledge regarding Ebola is critical and pertinent ... of hazardous global outbreak and epidemic. The Journal, ... a special issue, Ebola Virus and Public Health, to ... knowledge in this critical societal moment. , On ... Ebola for Clinicians . The primer was prepared by ...
Breaking Biology News(10 mins):Improved electricity access has little impact on climate change 2Whole-exome sequencing shows potential as diagnostic tool 2
... Director of Genomic Technologies, Dr Yijun RUAN, led a ... how genes interact/communicate and influence each other, even when ... discovery is crucial in understanding how human genes work ... and coordination takes place in human cells. The ...
... Spotted salamanders exposed to contaminated roadside ponds are ... paper in Scientific Reports. This study provides the first ... negative effects of roads apparently by evolving rapidly. ... a host of contaminants from road runoff. Chief among ...
... The first study to check the effects of eating ... small helpings of purple potatoes (Purple Majesty) a day decreases ... In a report in the ACS, Journal of Agricultural ... seemingly small, is sufficient to potentially reduce the risk of ...
Cached Biology News:Singapore scientists lead in 3D mapping of human genome to help understand human diseases 2Road runoff spurring spotted salamander evolution 2
(Date:10/22/2014)...   Synthetic Biologics, Inc. (NYSE MKT: SYN), ... infections and diseases, announced today that the U.S. Patent ... for a composition of matter patent application that covers ... SYN-004. This is Synthetic Biologics, first allowed patent application ... to the Company,s extensive C. difficile patent ...
(Date:10/22/2014)... KONG , Oct. 22, 2014  aTyr Pharma ... that rare disease expert John C. McKew , ... McKew brings more than two decades of expertise in ... Institutes of Health, Wyeth Research and Genetics Institute, Inc. ... aTyr,s efforts to expand and translate its novel Physiocrine ...
(Date:10/20/2014)... 2014 Asterias Biotherapeutics, Inc. (NYSE MKT: ... a Notice of Grant Award (NGA) with the ... 1, 2014.  The NGA provides for the immediate ... of additional grant funds pursuant to the previously ... development of Asterias, product, AST-OPC1. The grant provides ...
(Date:10/20/2014)... Oct. 20, 2014 PureTech , a ... big healthcare problems, announced today the closing of ... participation from Invesco Perpetual, a $120 Billion group ... drive PureTech,s existing pipeline forward and to advance ... the scientific creativity to really go for the ...
Breaking Biology Technology:Synthetic Biologics Announces Allowance of Key U.S. Composition of Matter Patent for C. difficile Program 2Synthetic Biologics Announces Allowance of Key U.S. Composition of Matter Patent for C. difficile Program 3Synthetic Biologics Announces Allowance of Key U.S. Composition of Matter Patent for C. difficile Program 4aTyr Pharma Appoints John C. McKew, Ph.D., as Vice President, Research 2aTyr Pharma Appoints John C. McKew, Ph.D., as Vice President, Research 3Asterias Biotherapeutics Announces Notice of Grant Award with CIRM for Phase 1/2a Clinical Trial of AST-OPC1 in Complete Cervical Spinal Cord Injury 2Asterias Biotherapeutics Announces Notice of Grant Award with CIRM for Phase 1/2a Clinical Trial of AST-OPC1 in Complete Cervical Spinal Cord Injury 3Asterias Biotherapeutics Announces Notice of Grant Award with CIRM for Phase 1/2a Clinical Trial of AST-OPC1 in Complete Cervical Spinal Cord Injury 4PureTech Announces Expansion with Oversubscribed $55M Funding Round 2PureTech Announces Expansion with Oversubscribed $55M Funding Round 3PureTech Announces Expansion with Oversubscribed $55M Funding Round 4PureTech Announces Expansion with Oversubscribed $55M Funding Round 5PureTech Announces Expansion with Oversubscribed $55M Funding Round 6
... ... technology are highlighted at leading industry events. , ... Washington, DC (PRWEB) June 11, 2010 -- Open source software will be ... DIA Annual Meeting is the premier event for professionals involved in the discovery, ...
... June 11 /PRNewswire-Asia-FirstCall/ -- China-Biotics, Inc.,(Nasdaq: CHBT ) ... products in China , today reported,its financial results for the ... , , 4Q10 Financial Highlights, ... year-over-year increase;, ...
... ... of the evolution of the influenza virus and its human host, post-graduate student Stephen Huff ... of safe, free software downloads - best of all, the service is free. , ... (PRWEB) June 5, 2010 -- We ...
Cached Biology Technology:Open Source Clinical Trials Software Featured at the 46th DIA Annual Meeting 2Open Source Clinical Trials Software Featured at the 46th DIA Annual Meeting 3China-Biotics, Inc. Reports Record Quarterly and Annual Revenue Growth for Fiscal Year 2010 2China-Biotics, Inc. Reports Record Quarterly and Annual Revenue Growth for Fiscal Year 2010 3China-Biotics, Inc. Reports Record Quarterly and Annual Revenue Growth for Fiscal Year 2010 4China-Biotics, Inc. Reports Record Quarterly and Annual Revenue Growth for Fiscal Year 2010 5China-Biotics, Inc. Reports Record Quarterly and Annual Revenue Growth for Fiscal Year 2010 6China-Biotics, Inc. Reports Record Quarterly and Annual Revenue Growth for Fiscal Year 2010 7China-Biotics, Inc. Reports Record Quarterly and Annual Revenue Growth for Fiscal Year 2010 8China-Biotics, Inc. Reports Record Quarterly and Annual Revenue Growth for Fiscal Year 2010 9China-Biotics, Inc. Reports Record Quarterly and Annual Revenue Growth for Fiscal Year 2010 10China-Biotics, Inc. Reports Record Quarterly and Annual Revenue Growth for Fiscal Year 2010 11China-Biotics, Inc. Reports Record Quarterly and Annual Revenue Growth for Fiscal Year 2010 12China-Biotics, Inc. Reports Record Quarterly and Annual Revenue Growth for Fiscal Year 2010 13China-Biotics, Inc. Reports Record Quarterly and Annual Revenue Growth for Fiscal Year 2010 14China-Biotics, Inc. Reports Record Quarterly and Annual Revenue Growth for Fiscal Year 2010 15China-Biotics, Inc. Reports Record Quarterly and Annual Revenue Growth for Fiscal Year 2010 16Computational Microbiologist Uses His Expertise with Deadly Viruses to Devise a Superior System for Delivery of Safe, Free Software Downloads 2Computational Microbiologist Uses His Expertise with Deadly Viruses to Devise a Superior System for Delivery of Safe, Free Software Downloads 3Computational Microbiologist Uses His Expertise with Deadly Viruses to Devise a Superior System for Delivery of Safe, Free Software Downloads 4
This buffer is Specifically formulated to be used with Endogen's Poly-HRP Streptavidin...
... Microarray Gene Frame® has been specifically ... frames feature the same dual strength ... Frame® range for easy removal after ... and there are three sizes available. ...
For microscopy...
... slide processing offering reproducibility, reliability and ... miniaturization, automation and massive parallel analysis ... with many applications in both industrial ... from gene expression profiling, gene regulation ...
Biology Products: