Researchers Discover New Source of Cell Aging

Posted Leave a commentPosted in Health, Research, Science, Science and Technology

New research from the USC Viterbi School of Engineering could be critical to our comprehension of how the aging procedure functions. The discoveries conceivably make ready for better cancer drugs and progressive new medications that could tremendously improve human health in the twilight years.

The work, from Assistant Professor of Chemical Engineering and Materials Science Nick Graham and his group as a team with Scott Fraser, Provost Professor of Biological Sciences and Biomedical Engineering, and Pin Wang, Zohrab A. Kaprielian Fellow in Engineering, was as of late distributed in the Journal of Biological Chemistry.

“To drink from the fountain of youth, you need to make sense of where the fountain of youth is, and comprehend what the fountain of youth is doing,” Graham said. “We’re doing the inverse; we’re attempting to examine the reasons cells age, with the goal that we may almost certainly plan medicines for better aging.”

What makes cells age?

To accomplish this, lead author Alireza Delfarah, a graduate student in the Graham lab, concentrated on senescence, a characteristic procedure wherein cells for all time quit making new cells. This procedure is one of the key reasons for age-related deterioration, showing in diseases, for example, joint inflammation, osteoporosis and coronary disease.

“Senescent cells are viably something contrary to stem cells, which have a boundless potential for self-reestablishment or division,” Delfarah said. “Senescent cells can never isolate again. It’s an irreversible condition of cell cycle arrest.”

The study group found that the aging, senescent cells quit delivering a class of synthetics called nucleotides, which are the building blocks of DNA. When they took young cells and constrained them to quit delivering nucleotides, they ended up senescent, or aged.

“This implies the generation of nucleotides is fundamental to keep cells young,” Delfarah said. “It likewise implies that on the off chance that we could keep cells from losing nucleotide production, the cells may age all the more gradually.”


Alireza Delfarah, Sydney Parrish, Jason A. Junge, Jesse Yang, Frances Seo, Si Li, John Mac, Pin Wang, Scott E. Fraser, Nicholas A. Graham. Inhibition of nucleotide synthesis promotes replicative senescence of human mammary epithelial cellsJournal of Biological Chemistry, 2019; 294 (27): 10564 DOI: 10.1074/jbc.RA118.005806

Crusaders’ DNA Revealed History of Crusades

Posted Leave a commentPosted in History, Research, Science
Lebanon Crusadors

History can disclose to us a ton about the Crusades, the arrangement of religious wars battled somewhere in the range of 1095 and 1291, in which Christian trespassers endeavored to guarantee the Near East. However, the DNA of nine thirteenth century Crusaders covered in a pit in Lebanon demonstrates that there’s a whole other world to find out about who the Crusaders were and their connections with the populaces they experienced. The work shows up in The American Journal of Human Genetics.

The remaining parts propose that the warriors making up the Crusader armed forces were hereditarily different and intermixed with the nearby populace in the Near East, despite the fact that they didn’t lastingly affect the hereditary genes of Lebanese individuals living today. They additionally feature the significant job old DNA can play in helping us comprehend recorded occasions that are less all around reported.

“We realize that Richard the Lionheart went to battle in the Crusades, yet we don’t think a lot about the standard fighters who lived and died there, and these antiquated examples give us bits of knowledge into that,” says senior creator Chris Tyler-Smith, a genetics scientist at the Wellcome Sanger Institute.

“Our discoveries give us an uncommon perspective on the lineage of the general population who battled in the Crusader armed force. Furthermore, it wasn’t simply Europeans,” says first author Marc Haber, additionally of the Wellcome Sanger Institute. “We see this extraordinary genetic assorted variety in the Near East amid medieval occasions, with Europeans, Near Easterners, and blended people battling in the Crusades and living and dying one next to the other.”


Marc Haber, Claude Doumet-Serhal, Christiana L. Scheib, Yali Xue, Richard Mikulski, Rui Martiniano, Bettina Fischer-Genz, Holger Schutkowski, Toomas Kivisild, Chris Tyler-Smith. A Transient Pulse of Genetic Admixture from the Crusaders in the Near East Identified from Ancient Genome SequencesThe American Journal of Human Genetics, 2019; DOI: 10.1016/j.ajhg.2019.03.015

Scientists Created DNA Sugar that Mimics Interstellar Space Suggests Existence of Sugar in Deep Space

Posted Leave a commentPosted in Science, Space, Tech
Interstellar sugar fig1

New research proposes that the sugar particle that puts the “D” in DNA — 2-deoxyribose — could exist in the furthest reaches of space. A group of NASA astrophysicists had the capacity to make DNA’s sugar in research center conditions that impersonate interstellar space.


The researchers demonstrate that one more of life’s basic concoction building blocks could be across the board known to mankind and conceivably seed different planets also.

"We don't yet know whether life is usual to mankind, however we're almost certain the nearness of life's building blocks is anything but a constraining component," said Michel Nuevo, a scientist at NASA's Ames Research Center in California's Silicon Valley and the lead author of the paper.

The outcomes speak to the primary strong proof of the arrangement of DNA’s sugar in an astrophysical setting.



Publication: Michel Nuevo, et al., “Deoxyribose and deoxysugar derivatives from photoprocessed astrophysical ice analogues and comparison to meteorites,” Nature Communications volume 9, Article number: 5276 (2018)