Navigation Links
'Ancestral eve' was mother of all tooth decay

A New York University College of Dentistry (NYUCD) research team has found the first oral bacterial evidence supporting the dispersal of modern Homo sapiens out of Africa to Asia.

The team, led by Page Caufield, a professor of cariology and comprehensive care at NYUCD, discovered that Streptoccocus mutans, a bacterium associated with dental caries, has evolved along with its human hosts in a clear line that can be traced back to a single common ancestor who lived in Africa between 100,000 and 200,000 years ago.

S. mutans is transmitted from mothers to infants, and first appears in an infant’s mouth at about two years of age. Caufield’s findings are reported in an article in the February issue of the Journal of Bacteriology.

In his analysis of the bacterium, Caufield used DNA fingerprints and other biomarkers that scientists have also employed to trace human evolution back to a single common African ancestor, known as "ancestral Eve."

"As humans migrated around the world and evolved into the different races and ethnicities we know today," Caufield said, "this oral bacterium evolved with them in a simultaneous process called coevolution."

"It is relatively easy to trace the evolution of S. mutans, since it reproduces through simple cell division," says Caufield, who gathered over 600 samples of the bacterium on six continents over the past two decades. His final analysis focused on over 60 strains of S. mutans collected from Chinese and Japanese; Africans; African-Americans and Hispanics in the United States; Caucasians in the United States, Sweden, and Australia; and Amazon Indians in Brazil and Guyana.

"By tracing the DNA lineages of these strains," Caufield said, "We have constructed an evolutionary family tree with its roots in Africa and its main branch extending to Asia. A second branch, extending from Asia back to Europe, traces the migration of a small group of Asians who founded at least one group of modern-day Caucasians."

Additional branches, tracing the coevolution of humans and bacteria from Asia into North and South America, will be drawn in the next phase of Caufield’s analysis.
'"/>

Source:New York University


Related biology news :

1. Adding Radiation Therapy To Chemotherapy Improves Survival In Patients With High-risk Breast Cancer
2. New Treatment Rivals Chemotherapy For Lymphoma, Study Finds
3. Bevacizumab Combined With Chemotherapy Improves Progression-Free Survival for Patients With Advanced Breast Cancer
4. Report that delayed motherhood decreases life expectancy of mouse offspring
5. Tendency to hair loss inherited from the mother
6. USC researchers determine mechanism of action of chemotherapy drug
7. Studies clarify risk factors for mother-to-child transmission of hepatitis C virus
8. Mining biotechs data mother lode
9. Gene expression profile helps predict chemotherapy response in ovarian cancer patients
10. Ultrasounds show mothers drinking shrinks fetal brain
11. Hyena mothers give their cubs a helpful dose of hormones

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:4/14/2016)... 14, 2016 BioCatch ™, ... today announced the appointment of Eyal Goldwerger ... Goldwerger,s leadership appointment comes at a time ... the deployment of its platform at several of the ... which discerns unique cognitive and physiological factors, is a ...
(Date:3/29/2016)... 2016 LegacyXChange, Inc. (OTC: ... SelectaDNA/CSI Protect are pleased to announce our successful effort ... variety of writing instruments, ensuring athletes signatures against counterfeiting ... from athletes on LegacyXChange will be assured of ongoing ... Bill Bollander , CEO states, "By ...
(Date:3/21/2016)... 2016 Unique technology combines ... superior security   Xura, Inc. ... secure digital communications services, today announced it is working ... enterprise customers, particularly those in the Financial Services Sector, ... authentication within a mobile app, alongside, and in combination ...
Breaking Biology News(10 mins):
(Date:4/28/2016)... Boston, MA (PRWEB) , ... April 28, 2016 ... ... (EDT), Asymmetrex will deliver a talk on its first-in-class technologies for ... the 2016 Meeting on RNAiMicroRNA Biology to Reprogramming & CRISPR-based Genome ...
(Date:4/27/2016)... ... April 27, 2016 , ... Shimadzu Scientific Instruments ... Spring 2016 Marijuana Business Conference and Expo. Shimadzu’s high-performance instruments enable laboratories to ... more. Expo attendees can stop by booth 1021 to learn how Shimadzu’s instruments ...
(Date:4/27/2016)... RESEARCH TRIANGLE PARK, N.C. , April ... UTHR ) announced today that Martine Rothblatt , ... will provide an overview and update on the company,s ... Health Care Conference. The presentation will take ... Eastern Time, and can be accessed via a live ...
(Date:4/27/2016)... ... April 27, 2016 , ... ... PET (Positron Emission Tomography) and MRI (Magnetic Resonance Imaging) in existing third-party MRI ... testing novel treatments in small animal subjects. Simultaneous PET/MRI imaging offers a solution ...
Breaking Biology Technology: