Hereditary-patterned baldness

Hereditary-pattern baldness is a common, natural form of hair loss caused by genetics, hormones, and aging. It leads to gradual thinning of hair often starting at the temples and crown in men and as overall thinning on the top of the scalp in women. The hair loss is permanent, treatments like minoxidil or finasteride can slow it down or help regrow some hair. The condition tends to worsen over time, especially if it starts at a younger age. 

#Genetics #SportsScience #DNA #HumanTraits #ScienceNews

Source : https://www.health.harvard.edu/a_to_z/hereditary-patterned-baldness-a-to-z

How Genes Affect Heart Function and Lead to Heart Failure

 How Genes Affect Heart Function and Lead to Heart Failure

A recent genetics study published in Nature Communications looked at how genes affect the structure and function of the heart’s ventricles and how this relates to heart failure. Researchers studied genetic data from more than 56,000 people and found over 200 genetic locations linked to heart function, including many that had never been discovered before.

 Some of these genes may help explain why certain people are more likely to develop heart failure. The study also identified possible targets for new medications, which could help doctors treat heart failure more effectively in the future. Understanding the genetic causes of heart disease is important because it can lead to earlier diagnosis, better prevention, and more personalized treatments based on a person’s DNA. This research shows how genome-wide studies can help scientists find new ways to improve patient care and develop therapies for serious conditions like heart failure. 

Citations:

Aung, N., Vargas, J. D., Yang, C., Fung, K., Sanghvi, M. M., Piechnik, S. K., Neubauer, S., Ani Manichaikul, Rotter, J. I., Taylor, K. D., Joao, Bluemke, D. A., Kawut, S. M., Petersen, S. E., & Munroe, P. B. (2022). Genome-wide association analysis reveals insights into the genetic architecture of right ventricular structure and function. Nature Genetics, 54(6), 783–791. https://doi.org/10.1038/s41588-022-01083-2

Nicholls, H. L., Vargas, J. D., Sanghvi, M. M., Ahn, H.-S., Chahal, C. A. A., Khanji, M. Y., Petersen, S. E., Munroe, P. B., & Aung, N. (2026). Genome-wide analysis of cardiac ventricular phenotypes reveals novel loci and therapeutic targets for heart failure. Nature Communications. https://doi.org/10.1038/s41467-026-69982-0

How Snails Can Help Us Grow New Eyes

A species of snail once thought to be an invasive nuisance has become a major stepping stone in the medical felid serving as a great model organism. Recent research shows that the golden apple snail could unlock the secret to regenerating lost or damaged human eyes. It essentially explains that the golden apple snail has eyes which are both structurally and genetically similar to human eyes. However unlike humans, this snail has the ability to completely regenerate its eyes if damaged or lost entirely. Further more both snails and humans need the PAX6 gene to grow eyes, Accorsi found that when she disabled that particular gene that the snails could not grow eyes at all. Understanding how these snail regenerate their eyes could provide insight on how to better treat eye injury and disease. Despite being early in the research process the articles suggests that scientists may be able to utilize these mechanics in order to develop and repair human eyes.

Saey, T. H. (2025, August 6). This snail may hold a secret to human eye regeneration. Science News. https://www.sciencenews.org/article/snail-human-eye-regeneration

Scanza, R. (2024, March 27). An eye for an eye: The apple snail. Stowers Institute. https://www.stowers.org/news/an-eye-for-an-eye-the-apple-snail

Chromosome Rearrangements: Small Changes, Big Effects

    One topic that has been getting more attention is chromosome rearrangement, a major type of chromosome mutation. These chromosome rearrangements include deletions, duplications, inversions, and translocations. Instead of changing just one gene, they move large sections of DNA around. So, many serious health conditions like developmental delays, intellectual disabilities, congenital disabilities, and complex disorders, can be caused by the loss of genetic material or disruption of genes.

Figure: Explaining types of Chromosomal Rearrangement

    The study explains even though rearrangements are not always harmful, they still affect how genes are expressed. In other cases, important genetic information might be lost or duplicated due to rearrangements. Another point is that these mutations usually happen during processes like meiosis, when reproductive cells are being formed so rearrangements can sometimes be passed down to future generations. Specifically, people get chromosomal rearrangements during the formation of egg and sperm. When pairs of chromosomes break and swap species during recombination step, rearrangement may occur if they line up unevenly or the break is not repaired properly. If these cells are involved in fertilization, the embryo can inherit extra, missing, or rearranged chromosome pieces, which are then copied into all the cells as the baby grows.  

    As mentioned, since chromosome rearrangements are linked to many genetic disorders and diseases, studying these mutations helps scientists understand how the genome works. As a result, the treatment is offered by using genetic testing to identify these rearrangements early, which helps doctors diagnose certain conditions more effectively.

Source:

https://www.labxchange.org/library/items/lb:LabXchange:dc2581f7:html:1

Additional Source:

https://learn.genetics.utah.edu/content/disorders/rearrangements/

CRISPR is Actually Fixing Genetic Diseases

 Links:

• https://www.nature.com/articles/d41586-023-03972-9 
• https://www.genome.gov/about-genomics/policy-issues/Genome-Editing

Tag: CRISPR

Commentary:

CRISPR is starting to actually fix genetic diseases like sickle cell, which is something that used to sound impossible. Instead of just treating symptoms, it goes straight to the DNA and corrects the mutation. That completely changes how we think about medicine. At the same time, it is not perfect and there are still risks, especially with off target edits and long term effects. There is also the bigger question of how far this should go, especially if people start using it for non medical reasons. Even with those concerns, this is one of the biggest breakthroughs in genetics right now and it is only going to keep growing.

How DNA Mutations Lead to Cancer

Cancer usually starts with normal cells in the body that develop mutations in their DNA, which makes them grow and divide uncontrollably. DNA is usually responsible for providing instruction to cells to help them function correctly, and if there is a change in this instruction, they might begin to act in an unusual manner, leading to cancerous growths or tumors. This change in DNA might occur in various ways, such as a person inheriting a mutation from their parent or by something in their environment, such as chemicals, UV light, or tobacco smoke.

Cancer has been found to be caused by changes in genes that control cell growth and division. Some of these genes, known as oncogenes, when mutated, make cells grow faster. Other significant genes, known as tumor suppressor genes, control the uncontrolled division of cells. When these are turned off due to mutations, cells can grow uncontrollably. Changes in these kinds of genes make it easier for cancer to develop.

By understanding the genetic basis of cancer, scientists can create targeted therapies that attack cancer cells in specific ways. This means that therapies can now be created that specifically target the genetic mutations in a patient’s cancer cells, potentially making treatment more effective and side effects fewer. However, cancer can be caused by a complex mix of genetic and environmental factors, making treatment and prevention difficult.

I think that learning about the process of DNA mutations that lead to cancer is important because it highlights the connection that exists between genetics and disease. It also highlights the importance of prevention and the need for lifestyle changes such as the avoidance of smoking and the sun. Not only does genetic research help us understand cancer, it also provides us with hope for the future and the possibility of more effective treatments for cancer.

Source: https://www.cancer.gov/about-cancer/causes-prevention/genetics/genetic-changes-infographic

Additional Link: https://www.who.int/news-room/fact-sheets/detail/cancer

Tags: #Cancer #DNA #Genetics #Mutations

Cloning Breakthroughs Reveal the Limits of DNA

 An article from 2022 reveals that over 1000 dogs have been successfully cloned. The article shows how scientists have been cloning dogs, across multiple breeds, with relatively high success when compared to other animals. This is great news for the advancements in the field of genetics, due to dogs having a number of genetic similarities when compared to humans. With this being said, studies reveal that despite being genetically identical, the dogs would sometimes look or act differently to their original counterpart. These differences are likely caused by epigenetic factors (changes in how genes are expressed, not the genes themselves) and issues with the cloning process, such as how cells are reprogrammed. With this in mind one can imagine how an individual paying over $50,000 to clone their beloved family pet may be disappointed when it looks and acts nothing like the original. Oscar winning singer and actress Barbra Streisand was one of these individuals, stating, “They have different personalities... I’m waiting for them to get older so I can see if they have her brown eyes and her seriousness.”

All in all, it is clear that cloning is more complex than just copying DNA. While it can produce animals that are genetically identical, environmental and cellular factors play a big role in how those animals actually turn out. As the process of cloning becomes more refined, and more research gets done, it is not outside the realm of possibility that there will be clones every where within the near future.

Mouse Studies Reveal Why Cloning Can Not Last Forever

 

   The article explains that cloning is not as perfect as when looking at it from a genetics point of view. Cloning is a technique used to make copies of living things, including genes, cells, tissues, and even whole animals. Scientists studied mice that were repeatedly cloned over many generations to understand what happens to their DNA over time. At the beginning, the cloned mice were normal and healthy, which suggested that cloning was working well. However, after many generations, the researchers started to notice serious genetic changes.

    The main finding was that genetic mutations slowly built up in the cloned mice. Each time a mouse was cloned, its DNA was copied, but small errors, which could be called mutations, happened during this process. As mentioned, when cloning uses the same DNA repeatedly, these mutations were passed down and accumulated over generations. Additionally, because cloning does not have the advantage like natural reproduction, where genetic material from two parents can help reduce harmful mutations. As a result, the cloned mice ended up with about three times more mutations than normal mice, some could not survive long after birth by later generations.

    This study highlights that DNA is not copied perfectly every time, and without genetic variation, mutations can possibly build up and cause serious problems. It also underlines why natural reproduction is important for maintaining healthy populations compared to the cloning technique. The research suggests that while cloning may work in the short term, there are still biological limitations and may not be a reliable long-term solution for the efforts in conserving as well as preventing extinction of species. 

Source:

https://www.reuters.com/business/healthcare-pharmaceuticals/mouse-study-shows-repeated-cloning-causes-grave-genetic-mutations-2026-03-24/

Additional Source:

https://www.scmp.com/news/asia/east-asia/article/3184261/japan-scientists-clone-freeze-dried-mice-bid-beat-extinction