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

Gene Therapy: A New Way to Treat Genetic Disorder

Gene therapy is a medical treatment that provides the opportunity for scientists to cure diseases by repairing or replacing defective genes. Gene therapy does not focus on the symptoms of diseases but instead focuses on the root cause of diseases. Therefore, gene therapy has the potential to become the future of medicine.

Gene therapy has made significant progress in curing rare diseases like spinal muscular atrophy and blindness. Gene therapy has improved the quality of life for many patients suffering from rare diseases. Gene therapy has the potential to become the future of medicine because it attacks the root cause of diseases.

Gene therapy, however, is expensive and not available to everyone. Gene therapy treatment is expensive, and many patients cannot afford it. Gene therapy needs to become cheaper and available to everyone. Gene therapy needs to become cheaper and available to everyone.

I think gene therapy has the potential to become the future of medicine. Gene therapy attacks the root cause of diseases. Therefore, gene therapy has the potential to become the future of medicine. Gene therapy has the potential to become the future of medicine because it has the potential to cure diseases in the future.

Source: https://www.fda.gov/vaccines-blood-biologics/cellular-gene-therapy-products/what-gene-therapy

Additional Source: https://www.genome.gov/genetics-glossary/Gene-Therapy

Tags: #GeneTherapy #Genetics #Medicine #DNA

Hope for Prevention of a Genetic Disease Before Birth

    Stanford medicine discovered a new technique to treat a rare genetic disorder called Fanconi anemia in babies before they are born. Fanconi anemia is a disease that causes a deficiency in DNA repair. So, when cells are dividing problems emerge in bone marrow not making blood and immune cells. This results in the children having lower energy levels, low platelet levels, headaches, greater risk of infections and cancer, and pale skin.

    This technique is done by a prenatal stem cell transplant. Pregnant moms donate healthy blood-forming stem cells which then are infused into her uterus through the umbilical cord. This treatment suggests that the features of the babies developing immune system can allow this transplant to settle the disorder before the baby is born. This technique is very new and Agnieszka Czechowicz, a Stanford Medicine pediatric hematologist who is responsible for this research, has only done this approach to the first research participants. Many questions still exist because the treatment has only started recently. However, a survey about what people think of the prenatal treatment concept showed that 100% of Fanconi amemia patients would undergo this prenatal diagnosis. 

Figure 1. Explanation of the Disease 

This article brings hope to everybody---but especially parents-to-be who are expecting their child to have this genetic disease. When the fetus has Fanconi anemia, they have a lower stem cell count so there is room for the mother's healthy blood-forming stem cells. This study was also tested in mice and was successful at other institutions as well. This research also believes that the children would never need subsequent therapies so they could live a typical life after birth. A major disease that could eventually affect the child later in life is cancer. If this prenatal transplant occurs, the child would not be at a high risk for cancer and have to deal with months of chemotherapy. Overall, these findings give people a reason to try to treat this disease before birth. 

Source: https://med.stanford.edu/news/insights/2026/03/fanconi-anemia-prenatal-stem-cell-transplant-trial.html 

Link specifically about Fanconi anemia: https://my.clevelandclinic.org/health/diseases/14473-fanconi-anemia-fa 

Genetics, Consanguinity, and Rare Neurological Diseases

This research article explains how genetics plays a major role in brain-related disorders, especially in families where parents are closely related, known as inbreeding. This type of relationship is more common in some parts of the world, like the Middle East and Africa. The researchers observed the advances in sequencing technologies, where whole exome and genome sequencing have sped up the discovery of new genes, and helped scientists understand how consanguinity influences genetics by identifying new disease-related alleles, hypomorphic and founder alleles. Particularly, consanguinity increases the chance that a child inherits the same harmful gene from both parents causing the risk of rare diseases becoming higher like Wilson’s disease, Kleefstra syndrome, mitochondrial encephalomyopathy, lactic acidosis and stroke. This is called an autosomal recessive disorder. One of the important ideas from the article, many rare genetic diseases affect the brain and nervous system because neurons are very specialized cells that the body cannot easily regenerate so even small genetic mutations can disrupt important functions like how neurons grow, communicate, or produce energy. The suggested treatments for rare neurological disease in small groups by applying symptom management (medications, therapies, surgery), and emerging precision medicine like gene therapy to optimally reduce the risks. 

The article demonstrates why some rare neurological diseases appear more often in certain populations where consanguineous mating has become traditional and how science works toward better prevention, also early diagnosis can assist doctors manage symptoms and give genetic counseling to families.

Source:

https://www.frontiersin.org/journals/neurology/articles/10.3389/fneur.2025.1494253/full#share

Additional Source:

https://www.ebsco.com/research-starters/health-and-medicine/consanguinity-and-genetic-disease

Are DNA Testing Kits Putting Your Privacy at Risk?

DNA testing kits such as 23andMe have become very popular because they help people discover their ancestry and potential health hazards. These tests are very easy to use and help people get interesting information about their own genes.

Nevertheless, there are some concerns about their use. Many companies store genetic information, and there is a potential risk that this information might be used without the individual's clear knowledge. Genetic information is very personal and also can be abused.

I think these tests are very helpful, and individuals should be aware of the potential risks. It is essential to read the privacy policy before giving out their DNA. DNA testing is very helpful, and it should be used with caution.

Source: https://www.consumerreports.org/health/dna-test-kits/privacy-and-direct-to-consumer-genetic-testing-dna-test-kits-a1187212155/

Additional Link: https://medlineplus.gov/genetics/understanding/dtcgenetictesting/directtoconsumer/

Yogi Patel
03/23/26

Tags: #DNATesting #Genetics #Privacy #DNA 

A Fish That Skips Sex and Still Survives: A Genetic Mystery

                 Most species rely on sexual reproduction to mix genes and maintain healthy genetic diversity. However, scientists have discovered a unique fish species that appears to survive without traditional reproduction. The Amazon molly, an all-female fish species, reproduces through a process called gynogenesis. This is where the presence of sperm from a related species triggers reproduction but the sperm’s DNA is not actually incorporated into the offspring.

Normally, species that reproduce without mixing genes are expected to accumulate harmful mutations over time. Without the genetic variation created by sexual reproduction, these mutations can accumulate and eventually threaten the survival of the species. Because of this, scientists once believed that asexual species would not survive for long periods of time.

Recent research has revealed that the Amazon molly may avoid this problem through a genetic process known as gene conversion. Gene conversion is a mechanism where DNA sequences can be copied from one chromosome to another, effectively repairing or replacing damaged genetic information. This process allows the fish to remove some harmful mutations and maintain a relatively healthy genome.

                                 

This discovery is significant because it challenges long-standing ideas about evolution and reproduction. Scientists previously believed that sexual reproduction was essential for long-term survival because it helps prevent the buildup of harmful mutations. However, the Amazon molly has existed for more than 100,000 years, suggesting that alternative genetic mechanisms can help maintain genetic stability.

Understanding how gene conversion works in this species could help scientists learn more about how genomes repair themselves and how evolution can occur in unexpected ways. This research may also provide insights into how genetic mutations are managed in other organisms, including humans.

Source: 

https://www.sciencenews.org/article/sex-skipping-fish-hacks-evolution-gene

Additional Link: 

https://medlineplus.gov/genetics/understanding/mutationsanddisorders/