Chromosome News and Research

Latest Chromosome News and Research

Researchers discover gene for new form of intellectual disability

Researchers at the Centre for Addiction and Mental Health (CAMH) led a study discovering a gene for a new form of intellectual disability, as well as how it likely affects cognitive development by disrupting neuron functioning.

27 Apr 2012

Mitotic spindle may be more complex than previously thought

The mitotic spindle, an apparatus that segregates chromosomes during cell division, may be more complex than the standard textbook picture suggests, according to researchers at the Harvard School of Engineering and Applied Sciences.

27 Apr 2012

Researchers examines whether MRI can improve accuracy of Huntington’s diagnosis

Huntington disease (HD) is an inherited neurodegenerative disorder caused by a defect on chromosome four where, within the Huntingtin gene, a CAG repeat occurs too many times. Most individuals begin experiencing symptoms in their 40s or 50s, but studies have shown that significant brain atrophy occurs several years prior to an official HD diagnosis. As a result, the field has sought a preventive treatment that could be administered prior to the development of actual symptoms that might delay the onset of illness.

27 Apr 2012

Kids who are abused or bullied may age faster

The study finds that violence-related stress in children affects telomeres - special DNA sequences found at the tips of chromosomes. Telomeres, which prevent DNA from unravelling, get shorter each time cells divide, which limits the number of times cells can divide. Shorter telomeres have been linked to poorer survival and chronic diseases. Previous research has shown that smoking, obesity, mental-health disorders and stress may accelerate the process of telomere loss. This suggests that telomere length may reflect a person's biological age as well as their chronological age.

25 Apr 2012

Clinical trial to evaluate IGF-1 in children with SHANK3 deficiency

In an important test of one of the first drugs to target core symptoms of autism, researchers at Mount Sinai School of Medicine are undertaking a pilot clinical trial to evaluate insulin-like growth factor (IGF-1) in children who have SHANK3 deficiency (also known as 22q13 Deletion Syndrome or Phelan-McDermid Syndrome), a known cause of autism spectrum disorder (ASD).

25 Apr 2012

Stress can shorten telomeres at a very young age

Children who have experienced violence might really be older than their years. The DNA of 10-year-olds who experienced violence in their young lives has been found to show wear and tear normally associated with aging, a Duke University study has found.

24 Apr 2012

Researchers identify gene that increases risk of MI in newborns with CF

Researchers at Johns Hopkins have identified a gene that modifies the risk of newborns with cystic fibrosis (CF) developing neonatal intestinal obstruction, a potentially lethal complication of CF.

24 Apr 2012

Study pinpoints mechanism by which spindle checkpoint proteins bind chromosomes

The development of more effective cancer drugs could be a step nearer thanks to the discovery, by scientists at Warwick Medical School, of how an inbuilt 'security check' operates to guarantee cells divide with the correct number of chromosomes.

21 Apr 2012

Researchers uncover 22 new genes linked with autism, other neurodevelopmental disorders

When chromosomes replicate, sometimes there is an exchange of genetic material within a chromosome or between two or more chromosomes without a significant loss of genetic material. This exchange, known as a balanced chromosomal abnormality (BCA), can cause rearrangements in the genetic code.

21 Apr 2012

First study to look at link between gender and mother's cardiac disease

Women with heart disease are more likely to give birth to female rather than male babies according to a new study presented today at the World Congress of Cardiology. The study found that three-quarters of the 216 children born to 200 pregnant women with diagnosed heart disease were female.

20 Apr 2012

Conventional testing underestimates Rett Syndrome patients' cognitive abilities

Researchers at Montefiore Medical Center have identified, in a pilot study published in the April edition of Pediatric Neurology, that children with Rett Syndrome, who cannot speak or use their hands to communicate and therefore were thought to be unable to understand and process information, do in fact exhibit meaningful visual search whereby they can process and prioritize information.

18 Apr 2012

Individuals with low-quality genes may produce offspring with even more inferior chromosomes

Evolutionary biologists at the University of Toronto have found that individuals with low-quality genes may produce offspring with even more inferior chromosomes, possibly leading to the extinction of certain species over generations.

17 Apr 2012

Study finds lower cytokine levels in the plasma of children with autism

A University of Kansas Medical Center study found significantly lower levels of several cytokines, the immune system's messengers and regulators, in the plasma of children with autism disorder (AD) compared to that of unrelated healthy siblings from other families who had members with autism spectrum disorders.

17 Apr 2012

Two research studies on genetic components of Alzheimer's

Two research studies, co-led by UC Davis neurologist Charles DeCarli and conducted by an international team that included more than 80 scientists at 71 institutions in eight countries, has advanced understanding of the genetic components of Alzheimer's disease and of brain development. Both studies appear in the April 15 edition of the journal Nature Genetics.

16 Apr 2012

Researchers identify new mechanism by which colon cancer develops

A team of researchers at Case Western Reserve University School of Medicine have identified a new mechanism by which colon cancer develops. By focusing on segments of DNA located between genes, or so-called "junk DNA," the team has discovered a set of master switches, i.e., gene enhancer elements, that turn "on and off" key genes whose altered expression is defining for colon cancers.

16 Apr 2012

Researchers discover new class of molecular mutation in breast cancer

Mayo Clinic researchers have discovered a new class of molecular mutation in various forms of breast cancer, a finding that may shed new light on development and growth of different types of breast tumors. Called fusion transcripts, the mutated forms of RNA may also provide a way to identify tumor subtypes and offer new strategies to treat them, investigators say.

16 Apr 2012

Missing tool helps sperm and eggs develop exactly 23 chromosomes each

Researchers at the University of California, Davis have discovered a key tool that helps sperm and eggs develop exactly 23 chromosomes each. The work, which could lead to insights into fertility, spontaneous miscarriages, cancer and developmental disorders, is published April 13 in the journal Cell.

16 Apr 2012

Study investigates genetic factors and smoking exposure in Japanese lung cancer patients

Previous research has shown that Asian patients with lung cancer are more likely to harbor epidermal growth factor receptor (EGFR) mutations. Furthermore, Asian patients with lung cancer are more likely to be non-smokers than Western patients with lung cancer. Research in the May 2012 issue of the International Association for the Study of Lung Cancer's (IASLC) Journal of Thoracic Oncology goes deeper, investigated genetic factors and smoking exposure in Japanese lung cancer patients.

16 Apr 2012

ALL induction treatment failure should not be an automatic indication for bone marrow transplant

International study that included St. Jude Children's Research Hospital reports some young acute lymphoblastic leukemia patients who fail induction therapy can achieve high cure rates without bone marrow transplantation.

12 Apr 2012

Hi-C sequencing decodes 3-D structure of DNA folds in chromosomes

Chromosomes are strands of DNA that contain the blueprint of all living organisms. Humans have 23 pairs of chromosomes that instruct how genes are regulated during development of the human body. While scientists have developed an understanding of the one-dimensional structure of DNA, until today, little was known about how different parts of DNA are folded next to each other inside the nucleus.

12 Apr 2012