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Archive for the ‘genetics’ category: Page 285

May 2, 2020

US invests hundreds of millions to produce Covid-19 vaccines

Posted by in categories: biotech/medical, genetics

Jordan says Moderna is able to scale up quicker than traditional manufacturers, as its vaccines are created by manipulating mRNA, the molecule that carries genetic instructions from DNA to a cell’s protein-making ribosome. Moderna manipulates mRNA so that it instructs human cells to produce certain viral proteins; the proteins themselves don’t cause infection, but they do invoke an immune response. “The RNA uses the human body as its bioreactor,” says Jordan, so Moderna itself doesn’t have to manufacture the proteins. “To create a different vaccine candidate [for Moderna] is to trigger a different RNA sequence. We don’t need to build a different cell processing plant,” says Jordan.

The central dogma of molecular biology deals with the detailed residue-by-residue transfer of sequential information. It states that such information cannot be transferred back from protein to either protein or nucleic acid.— Francis Crick.

The dogma is a framework for understanding the transfer of sequence information between information-carrying biopolymers, in the most common or general case, in living organisms. There are 3 major classes of such biopolymers: DNA and RNA (both nucleic acids), and protein. There are 3×3=9 conceivable direct transfers of information that can occur between these. The dogma classes these into 3 groups of 3: three general transfers (believed to occur normally in most cells), three special transfers (known to occur, but only under specific conditions in case of some viruses or in a laboratory), and three unknown transfers (believed never to occur). The general transfers describe the normal flow of biological information: DNA can be copied to DNA (DNA replication), DNA information can be copied into mRNA (transcription), and proteins can be synthesized using the information in mRNA as a template (translation). The special transfers describe: RNA being copied from RNA (RNA replication), DNA being synthesised using an RNA template (reverse transcription), and proteins being synthesised directly from a DNA template without the use of mRNA. The unknown transfers describe: a protein being copied from a protein, synthesis of RNA using the primary structure of a protein as a template, and DNA synthesis using the primary structure of a protein as a template — these are not thought to naturally occur. [6].

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May 2, 2020

From DNA to protein — 3D

Posted by in categories: biotech/medical, genetics, neuroscience

We can reprogram our DNA. The nucleus of a cell is not read only. It is actually read and write. Basically, the cell is a programmable device, in response to environmental information.

The templates for protein synthesis are RNA (ribonucleic acid) molecules. In particular, a class of RNA molecules called messenger RNA (mRNA) are the information-carrying intermediates in protein synthesis. Other RNA molecules, such as transfer RNA (tRNA) and ribosomal RNA (rRNA), are part of the protein-synthesizing machinery. All forms of cellular RNA are synthesized by RNA polymerases that take instructions from DNA templates. This process of transcription is followed by translation, the synthesis of proteins according to instructions given by mRNA templates.

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May 2, 2020

Genetic Engineering Could Make a COVID-19 Vaccine in Months Rather Than Years

Posted by in categories: bioengineering, biotech/medical, genetics

Candidates are speeding toward human trials.

May 2, 2020

Transhumanism 2.0 (Full Documentary)

Posted by in categories: cybercrime/malcode, cyborgs, education, Elon Musk, genetics, neuroscience, quantum physics, robotics/AI, supercomputing, transhumanism

TABLE OF CONTENTS —————
:00–15:11 : Introduction
:11–36:12 CHAPTER 1: POSTHUMANISM
a. Neurotechnology b. Neurophilosophy c. Teilhard de Chardin and the Noosphere.

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POSTHUMAN TECHNOLOGY
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May 1, 2020

New molecular insights into how gut bacteria influences memory

Posted by in categories: bioengineering, biotech/medical, genetics

New research from an international team of scientists has tracked a compelling series of connections between the gut microbiome and memory. Using a novel mouse model engineered to simulate the genetic diversity of a human population, the study illustrates how genetics can influence memory via bacterial metabolites produced in the gut.

Over the past few years there has been significant research interest in the relationship between memory, cognition and the gut microbiome. While certain families of bacteria that live in our gut have been implicated in memory function, this new study set out to investigate the connection from a different angle, starting with the role genetics play in this relationship.

“To know if a microbial molecule influenced memory, we needed to understand the interaction between genetics and the microbiome,” explains co-corresponding author on the study, Antoine Snijders.

Apr 30, 2020

Hidden symmetry found in chemical kinetic equations

Posted by in categories: biotech/medical, genetics, information science, mathematics

Rice University researchers have discovered a hidden symmetry in the chemical kinetic equations scientists have long used to model and study many of the chemical processes essential for life.

The find has implications for drug design, genetics and biomedical research and is described in a study published this month in the Proceedings of the National Academy of Sciences. To illustrate the biological ramifications, study co-authors Oleg Igoshin, Anatoly Kolomeisky and Joel Mallory of Rice’s Center for Theoretical Biological Physics (CTBP) used three wide-ranging examples: protein folding, enzyme catalysis and motor protein efficiency.

In each case, the researchers demonstrated that a simple mathematical ratio shows that the likelihood of errors is controlled by kinetics rather than thermodynamics.

Apr 29, 2020

Cells edited with CRISPR prove safe in humans

Posted by in categories: biotech/medical, genetics

People with cancer show no serious side effects after treatment with gene-edited immune cells.

Apr 29, 2020

Drinking coffee appears to cause epigenetic changes to your DNA

Posted by in categories: biotech/medical, genetics, health

Coffee has been linked to changes on our DNA that affect how active certain genes are. The finding may help explain some of coffee’s touted health benefits.

Apr 29, 2020

Deep-space travel, colonization may rely on genetically engineered life forms

Posted by in categories: alien life, genetics, sustainability

On Earth, there are organisms that resist radiation, heat, cold, and drying, even to the point of being able to live in the space vacuum.


Genetic biotechnology is usually discussed in the context of current and emerging applications here on Earth, and rightly so, since we still live exclusively in our planetary cradle. But as humanity looks outward, we ponder what kind of life we ought to take with us to support outposts and eventually colonies off the Earth.

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Apr 28, 2020

Molecules identified that reverse cellular aging process

Posted by in categories: biotech/medical, genetics, life extension

Central to a lot of scientific research into aging are tiny caps on the ends of our chromosomes called telomeres. These protective sequences of DNA grow a little shorter each time a cell divides, but by intervening in this process, researchers hope to one day regulate the process of aging and the ill health effects it can bring. A Harvard team is now offering an exciting pathway forward, discovering a set of small molecules capable of restoring telomere length in mice.

Telomeres can be thought of like the plastic tips on the end of our shoelaces, preventing the fraying of the DNA code of the genome and playing an important part in a healthy aging process. But each time a cell divides, they grow a little shorter. This sequence repeats over and over until the cell can no longer divide and dies.

This process is linked to aging and disease, including a rare genetic disease called dyskeratosis congenita (DC). This is caused by the premature aging of cells and is where the team focused its attention, hoping to offer alternatives to the current treatment that involves high-risk bone marrow transplants and which offers limited benefits.