Chromosome 3 News and Research

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Humans normally have 46 chromosomes in each cell, divided into 23 pairs. Two copies of chromosome 3, one copy inherited from each parent, form one of the pairs. Chromosome 3 spans almost 200 million base pairs (the building blocks of DNA) and represents approximately 6.5 percent of the total DNA in cells.

Identifying genes on each chromosome is an active area of genetic research. Because researchers use different approaches to predict the number of genes on each chromosome, the estimated number of genes varies. Chromosome 3 likely contains between 1,100 and 1,500 genes.

Genes on chromosome 3 are among the estimated 20,000 to 25,000 total genes in the human genome.

Sex and gender not receiving enough attention in COVID-19 trials

Researchers in Denmark and the Netherlands have conducted a study showing that sex and gender are not being adequately considered in clinical trials investigating severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and the coronavirus disease 2019 (COVID-19) pandemic.

15 Sep 2020

Exploring sex differences in gene expression

Males and females share the vast majority of their genomes. Only a sprinkling of genes, located on the so-called X and Y sex chromosomes, differ between the sexes. Nevertheless, the activities of our genes--their expression in cells and tissues--generate profound distinctions between males and females.

12 Sep 2020

Inherited variation in GATA3 gene is linked to relapse in children with acute lymphoblastic leukemia

Scientists at St. Jude Children's Research Hospital are investigating the inherited genetics of childhood leukemia and how particular gene variations can affect treatment outcomes.

11 Sep 2020

Study uncovers genetic vulnerability in breast cancers tumors

The study, published in the scientific journal Nature, has uncovered a genetic vulnerability present in nearly 10% percent of all breast cancers tumours, and found a way to target this vulnerability and selectively kill cancer cells.

9 Sep 2020

Study sheds new light on function and regulation of APOBEC3B in adrenocortical carcinoma

The cover for issue 36 of Oncotarget features, "Knockdown of APOBEC3B is associated with a lower tumor growth in an adrenocortical carcinoma xenograft mouse model," by Gara, et al. which reported that the role of APOBEC3B in adrenocortical carcinoma and the mechanisms through which its expression is regulated in cancer are not fully understood.

9 Sep 2020

Activation of fatty acid receptor causes masculinization of Japanese rice fish

A research collaboration based at Kumamoto University (Japan) has found that activation of PPARα, a fatty acid receptor that detects fatty acids in cells and regulates physiological functions, causes masculinization of Japanese rice fish (medaka).

5 Sep 2020

Researchers identify a pattern in cancer’s chromosomal chaos

Researchers at the Francis Crick Institute and the UCL Cancer Institute have identified how different cancers go through some of the same genetic mutations at the same point in their evolution.

3 Sep 2020

Misfiring brain cells may create swallowing difficulties in children with neurodevelopmental disorders

Misfiring brain cells that control key parts of the mouth and tongue may be creating swallowing difficulties in children with neurodevelopmental disorders, according to neuroscientists with Virginia Tech and George Washington University.

2 Sep 2020

Targeted therapy achieves durable objective responses Phase I/II LIBRETTO-001 trial

For patients with non-small cell lung cancers (NSCLC) marked by RET gene fusions, the targeted therapy selpercatinib was well tolerated and achieved durable objective responses, or tumor shrinkage, in the majority of participants in the Phase I/II LIBRETTO-001 trial, according to researchers from The University of Texas MD Anderson Cancer Center.

27 Aug 2020

Estradiol appears to help in female SARS-CoV-2 infection

A new study published on the preprint server medRxiv in August 2020 shows that the risk of infection is high for pre-menopausal women but the risk of death is much higher for men in the same age group and throws light on the protective nature of estradiol therapy in post-menopausal women.

26 Aug 2020

Researchers solve a long-held mystery of X chromosome inactivation

Researchers at Massachusetts General Hospital (MGH) have solved a mystery that has long puzzled scientists: How do the bodies of female humans and all other mammals decide which of the two X chromosomes it carries in each cell should be active and which one should be silent?

18 Aug 2020

Genes on the X chromosome may be key to melanoma survival advantage in females

Centenary Institute scientists have discovered that genes on the X chromosome may be key to the improved survival rates of females with melanoma–as compared to their male counterparts.

13 Aug 2020

Study sheds new light on mechanisms of cohesin function involved in cancer and cardiac development

Ana Losada, from the Spanish National Cancer Research Centre (CNIO), is the scientist who identified cohesin in vertebrates, a protein that is essential in cell division.

12 Aug 2020

TRA-1 gene determines the sex of roundworms

Biological sex is typically understood in binary terms: male and female. However, there are many examples of animals that are able to modify sex-typical biological and behavioral features and even change sex.

11 Aug 2020

Genetic variant in Japanese population increases risk of interstitial lung disease among RA patients

In many cases, a complex interplay between our genes and the environment governs whether or not we will develop a certain disease. Interestingly though, researchers are discovering that the genetic component of disease predisposition may depend on our ethnic background.

10 Aug 2020

DHODH inhibitor PTC299 shows potential as a COVID-19 therapeutic

As COVID-19 continues to take a heavy toll on human health and life in many parts of the world, there is still no effective antiviral drug or vaccine. This has fueled an intensive search for small molecules and proteins that can inhibit viral entry and replication.

10 Aug 2020

COVID-19 should be treated as an acute inflammatory disease, Massey scientist says

The COVID-19 pandemic has had detrimental effects on global infrastructure sectors, including economic, political, health care, education and research systems, and there is still no definitive treatment strategy for the disease.

5 Aug 2020

Study reveals molecular cause underlying rare genetic disorder

Virginia Tech scientists have revealed how a nonfunctioning version of an ordinary gene impairs brain structure and function. The findings help explain a genetic form of microcephaly -- a condition where babies' heads are small and grow more slowly than their peers.

27 Jul 2020

Researchers use new approach to unravel the mechanisms that lie behind tetraploidy

Cell division is a fundamental process that organisms need to reproduce, grow, and make repairs. But when an error disrupts this complex biological process, cellular abnormalities can lead to diseases, such as cancer, where cells are enabled to grow and divide out of control.

25 Jul 2020

Researchers identify TLR7 gene that predisposes elderly patients to severe COVID-19

Current observations suggest that the coronavirus SARS-CoV-2 causes severe symptoms mainly in elderly patients with chronic disease.