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Simple twists of fate

A novel Brandeis University study reports on molecular gymnastics performed by a protein involved in regulating DNA transcription. The research uses state-of-the-art tools and simple methods to observe the shape and behavior of individual DNA molecules.

SourceBrandeis University·JournalPLOS Biology·DateSep 29, 2008

Photosynthesizing bacteria with a day-night cycle contain rare chromosome

Scientists have found a novel linear chromosome in cyanobacterium Cyanothece 51142, containing genes important for producing biofuels. The discovery was made possible by simultaneous DNA sequencing and protein analysis, which revealed more genes on the linear and circular chromosomes than previously thought.

SourceDOE/Pacific Northwest National Laboratory·JournalProceedings of the National Academy of Sciences·DateSep 15, 2008

JCI online early table of contents: July 1, 2008

Researchers have discovered two drugs that can improve memory in a mouse model of Alzheimer's disease by inhibiting calpains. Additionally, they found stabilizing molecules for the faulty PAH protein in phenylketonuria (PKU), and identified a genetic marker for predicting prostate cancer spreading.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateJul 1, 2008

Evolution of fruit size in tomato

Researchers have identified two key loci responsible for extreme fruit size in tomatoes, including the fas locus that controls cell division and the locule-number locus that affects carpel number. This study provides a significant breakthrough in understanding tomato domestication and opens up new avenues for crop improvement.

JCI online early table of contents: May 15, 2008

Researchers suggest a novel approach to reducing VEGF-induced vision loss by targeting Src kinases, offering a potential alternative to painful eye injections. Leaky Ca2+ release channels in the brain and heart may also contribute to seizures and irregular heartbeats in individuals with certain inherited disorders.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateMay 15, 2008

JCI online early table of contents: May 8, 2008

Researchers found that slow fetal growth is linked to an increased risk of developing type 2 diabetes in adulthood. They also identified a new gene mutation associated with sudden cardiac death in humans. The study used rat models and human tissue samples to understand the mechanisms behind these diseases.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateMay 8, 2008

When poor communication pokes you in the eye

Researchers at Helmholtz Munich have identified a novel Connexin-like gene mutation that affects early lens development in mice, causing microphthalmia and cataracts. The study suggests that faulty cell communication between developing lens fibers may lead to the cloudiness of the eye lens.

First study hints at insights to come from genes unique to humans

Researchers have produced the first detailed analysis of a hominoid-only gene, TBC1D3, which is linked to cancer. The study found that the protein helps turn on RAS, a protein active in a third of all human cancers. Further research aims to uncover the functions of human-only genes and their potential applications in fighting diseases.

SourceWashU Medicine·JournalJournal of Biological Chemistry·DateMar 21, 2008

'Jumping gene' may contribute to a premature aging syndrome

Researchers have discovered a fusion protein that may contribute to Cockayne syndrome, a debilitating disorder marked by premature aging and neurodegeneration. The study suggests that the CSB gene's continued expression of CSB-related proteins or protein fragments plays a crucial role in the disease's development.

SourcePLOS·JournalPLOS Genetics·DateMar 20, 2008

JCI online early table of contents: March 3, 2008

Researchers analyzed skin biopsies from patients with acne before and after 1 week of treatment with 13-cis RA, suggesting new treatments may be developed to combat severe side effects. Estradiol-binding proteins play a role in protecting against hearing loss, potentially leading to new treatments for this condition as well.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateMar 3, 2008

Out-of-whack protein may boost Parkinson's

Researchers discovered a protein imbalance in Parkinson's disease patients and found that adding a phosphate group can reduce toxicity. The study suggests alpha-synuclein protein plays a key role in brain cell communication and may be a potential target for therapy.

SourceUniversity of Florida·JournalProceedings of the National Academy of Sciences·DateFeb 26, 2008

JCI table of contents: Feb. 21, 2008

A study found that genetic variations in the MBL2 protein are associated with more severe clinical symptoms of cystic fibrosis. In contrast, daily administration of growth hormone increased CD4+ T cell numbers in HIV-1 infected individuals, potentially treating conditions where CD4+ T cell function is impaired.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateFeb 21, 2008

JCI online early table of contents: Feb. 7, 2008

VEGF-B has been shown to inhibit apoptosis in retinal cells and brain cells in mouse models of injury and stroke, suggesting its potential as a new treatment for neurodegenerative diseases. Autophagy is also identified as a virulence-associated trait and survival mechanism for the fungal pathogen Cryptococcus neoformans.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateFeb 7, 2008

Why your fertility cells must have 'radio silence'

Scientists have uncovered a previously unknown mechanism that causes embryonic germ cells to go through a period of transcriptional silence, preventing the production of sperm or eggs. This regulation is crucial for germ cell development in various organisms and may hold significance for mammals as well.

SourceMcGill University·JournalNature·DateJan 29, 2008