Genes Don’t Always Determine Disease: New Research on Genetic Blindness

               A recent genetics study suggests that some mutations that were previously believed to always cause blindness may not lead to disease in many individuals. Researchers analyzed genetic data from large population databases and discovered that certain mutations linked to inherited retinal diseases cause symptoms in far fewer people than scientists originally expected.

The study focused on genetic variants associated with inherited retinal disorders, which damage the retina and can eventually lead to vision loss. The retina is the light-sensitive layer at the back of the eye that processes visual information. When the retina is damaged by genetic mutations, it can gradually lead to serious vision problems or blindness. In the past, scientists assumed that most people who carried these mutations would develop the disease. However, the study showed that only about 9% to 28% of individuals with these variants actually showed signs of retinal disease.

These findings highlight the complexity of genetics. Even when a person carries a mutation associated with a disease, it does not necessarily mean the disease will develop. Other genes or environmental factors may influence whether the condition appears. This concept is known as penetrance, which refers to the likelihood that a person with a certain genetic mutation will actually show symptoms.

This discovery is important because it changes how scientists and doctors think about genetic diseases. In the past, genetic testing sometimes suggested that certain mutations would almost always lead to disease. However, this research shows that the relationship between genes and disease is often more complicated than expected.

Understanding why some individuals remain healthy despite carrying these mutations could help researchers identify protective factors that prevent disease from developing. Learning more about these factors may lead to better treatments and improved genetic counseling for patients. Overall, this research helps scientists better understand how genetic mutations influence disease and may contribute to improved prevention and treatment of inherited eye disorders in the future.

Source: 

https://www.livescience.com/health/genetics/these-genes-were-thought-to-lead-to-blindness-100-percent-of-the-time-they-dont

Additional Link: 

https://medlineplus.gov/genetics/understanding/inheritance/penetranceexpressivity/

Lowered Cost of Protein Production, Thanks to AI.

  Researchers at the Michigan Institute of Technology found a way to using artificial intelligence to make the production of protein cheaper. The article explains the importance of industrial yeast and how it is the main contributor to the production of protein and how it is responsible for the manufacturing of vaccines. The AI tool observed the genetic code of a yeast and used that information to predict the best codons for manufacturing.  This AI tool showed to enhance the yeast's production of six different proteins. J. Christopher Love, Professor of Chemical Engineering at MIT, described predictive tools to be time efficient and save money.

Figure 1. K. phaffi is a type of yeast the model learned pattens of codon from in this project and it is important in the biopharmaceutical industry. 

    Technology is constantly evolving and scientists and researchers should take advantage of the possibilities that it brings. Using artificial intelligence in science could be scary because of potential errors, but this model bases its predictions off of observations of other genetic codes. This article mentioned that the model was trained in trastuzumab, which is an antibody used for cancer treatment. Using this model has the abilities lower costs of production of vaccines and other important compounds that are currently needed. If this research is able to save time on protein production, and ultimately help people, it should definitely be used. 

Source: 

https://news.mit.edu/2026/new-ai-model-could-cut-costs-developing-protein-drugs-0216 

Another source on this topic:

https://nationaltoday.com/us/ma/cambridge/news/2026/02/18/ai-model-may-slash-protein-drug-development-costs/

The Genetics of Height

 The Genetics of Height 

An article written by Molly McDonough explains how genetics have a significant impact on human height, a topic that has been debated for centuries. In the past, people believed height was determined by a single gene that simply ran in families. However, modern research has shown that height is actually a polygenic trait, meaning that many different genetic variations contribute to a person’s final height. Scientists have confirmed that approximately 90% of height variation is due to genetic factors, while environmental influences such as nutrition play a smaller, though still important, role. This research demonstrates how powerful DNA patterns are in shaping physical development.

 Understanding that height is influenced by hundreds or even thousands of genetic variants highlights the complexity of inheritance. Additionally, genes influence more than just height they also play a major role in health outcomes and disease risk. Studying these genetic patterns helps researchers better understand human development and can i

McDonough, M. (2025, August 13). The Genetics of Height. Harvard.edu. https://magazine.hms.harvard.edu/articles/genetics-height

MedlinePlus. (2022, July 8). Is height determined by genetics? Medlineplus.gov. https://medlineplus.gov/genetics/understanding/traits/height/

New Findings in Preterm Birth Genetics: What is the “Molecular Timer”

 Cecilia Burkhardt

Figure 1: Shown in red are uterine fibroblast cells from a mouse uterus. 

    Preterm births are pregnancies occurring before 37 weeks gestation. Babies born preterm are more suspectable of complication including eyesight, respiratory issues, underdeveloped organs, infections, etc. For a while premature births have been misunderstood, but a growing concern. A study from UC San Francisco aimed to answer the unanswered question and identified a “molecular timer” that is key to understanding why preterm births occur. 

    A protein known as KDM6B was discovered through research in … and its function proved to act as a regulator of activity within genes in the uterus. Significantly, the KDM6B control fibroblasts, structural cells, which was originally believed to have no role previously wit child labor. In the very early days of pregnancy the timer begins ticking and sets a genetic countdown for the stages of pregnancy.

    The study consists of research where methyl groups were removed from histones. In the early stages of pregnancy, the methyl groups ensure that the birth genes are maintained, so that the uterus can begin supporting the growing fetus. Throughout the duration of the pregnancy the methyl groups erode, and when the correct level of methyl groups has vanished labor can begin. In the study it was concluded that when the KDM6B protein was manipulated in mice, the quantity of the methyl groups changed and as a result directly manipulated the length of the pregnancy. 

    These findings hold significance in the field of genetics in relation to healthy pregnancies. Prior to these findings, premature births were thought to occur due to complications weeks before labor, but now it is suggested that the risk of preterm birth might be determined in the earlier stages of gestation. Researchers must continue research to discover if the KDM^B timer exists in humans more research could begin to investigate the protein and assist in genetic screenings in high-risk individuals to determine risk of preterm birth in relation to the KDM6B protein. This could lead to interventions that could allow for full term births to be carried through in high-risk births and lower the risk of complications and potentially result in healthy, full-term births. 

Tags: #Genetics #PretermBirth #UCSF #KDM6B #MolecularBiology #HealthScience 

Link 1: https://www.ucsf.edu/news/2025/01/429351/whats-behind-preterm-birth-scientists-just-found-big-clue#:~:text=Throughout%20pregnancy%2C%20the%20female%20body,KDM6B%20that%20regulates%20gene%20activity. 

Link 2: https://www.nichd.nih.gov/health/topics/preterm

The Genetics Behind Acne

 

    Acne vulgaris is often thought of as a simple teenage skin problem, but recent genetic research shows that it is actually a complex genetic condition influenced by multiple genes and environmental factors. Variations in specific genes contribute to inflammation, immune responses, and susceptibility to acne. Researchers describe acne as a polygenic disorder, meaning that many genes rather than a single mutation collectively influence whether someone develops acne and how severe it becomes. These genes mainly regulate inflammatory pathways and immune signaling in the skin. Certain genetic variants (called SNPs, or single nucleotide polymorphisms) can increase inflammatory signaling after bacteria like Cutibacterium acnes activate immune responses in hair follicles. This leads to redness, swelling, and lesion formation characteristic of acne. The study also highlights how genetic risk differs between populations. Variants associated with acne severity were found at different frequencies in Egyptian, Pakistani, Chinese, and European populations, showing that genetics and ancestry influence disease risk. Environmental factors such as hormones, stress, and diet interact with genetic predispositions, demonstrating a classic example of gene–environment interaction in human traits. Overall, this research changes how we view acne, not just as a cosmetic issue, but as a biologically complex condition shaped by genetics, immune regulation, and environmental influences.

This article demonstrates that acne is a polygenic trait, meaning multiple genes contribute small effects that together influence disease risk. Inflammatory cytokine genes such as IL-6 play a major role because genetic variants can increase immune responses that trigger acne lesions. Single nucleotide polymorphisms (SNPs) help researchers identify genetic differences that explain why acne severity varies between individuals. The research shows how ancestry affects genetic associations, emphasizing the importance of studying diverse populations in genetics research. Acne provides a clear example of gene–environment interaction, where genetics sets susceptibility but environmental factors influence outcomes. Understanding genetic pathways involved in acne could eventually lead to personalized dermatology treatments tailored to a patient’s genetic makeup.

Source: https://pmc.ncbi.nlm.nih.gov/articles/PMC10473401/

Additional Information: https://medlineplus.gov/genetics/understanding/traits/acne/ 

#Genetics #AcneResearch #PolygenicTraits #HumanGenetics #HealthScience

New Genetic Variant Linked to Higher Parkinson's Risk in People of African Descent

 

    Recently, researchers identified a genetic variant that appears to increase the risk of developing Parkinson’s disease in individuals of African descent. This is a variant that is not commonly seen in people of European or Asian ancestry. This finding comes from a large genetic analysis involving nearly 200,000 individuals of African ancestry, including participants from Nigeria and African‑American communities. The study found a specific variant in the GBA1 gene influencing how cells break down and recycle proteins that is more common among people with Parkinson’s in these populations. Unlike earlier research that focused mainly on populations of European descent, this study highlights the importance of diverse genetic research so that discoveries may benefit all populations. Understanding ancestry‑specific genetic risk factors could lead to better screening, prevention strategies, and eventually tailored treatments for Parkinson’s disease.

    The discovery highlights an ancestry‑specific genetic risk factor for Parkinson’s disease in people of African descent, demonstrating that genetic risk can vary significantly across populations. The variant is located in the GBA1 gene, which helps cells recycle proteins. People with one copy of this variant have about 50% higher risk of Parkinson’s, and those with two copies have even greater risk. Most genetic studies of Parkinson’s have historically focused on people of European ancestry, so this study helps correct that imbalance and expand scientific understanding. Researchers hope that identifying variants will eventually contribute to more personalized treatments or therapies that target specific biological pathways linked to Parkinson’s. This research highlights the value of global collaboration among scientists and genetic studies, focusing on diverse populations leads to discoveries that might otherwise be missed.

Source: https://www.pbs.org/newshour/show/gene-variant-found-linking-people-of-african-descent-to-higher-parkinsons-risk

Additional information: https://www.parkinsons.org.uk/index.php/news/2023/new-risk-factor-for-parkinsons-identified-among-people-african-descent

#Genetics #Parkinsons #HealthEquity #GBA1 #ScientificDiscovery 

Link between Maternal Genes and Miscarriages

  Link between Maternal Genes and Miscarriages

   Aneuploidy causes losses in the first trimester of pregnancy. This condition is more common in egg cells and is when cells have abnormal numbers of chromosomes. A study showed there was an association with SMC1B, which is a gene for a protein that holds chromosome pieces together. And another association with aneuploidy was found with C12orf39 that is responsible for controlling chromosome interaction during cell division. Aneuploidy is strongly related with a lower number of crossing over of chromosomes during the recombination stage. The study concluded that crossing over is important for making sure eggs have the correct amount of chromosomes.

    

Figure 1. A diagram showing the crossing over stage in Prophase I of meiosis that creates different combinations of chromosomes.

    Although this research might not be able to prevent pregnancy loss, it is a step in the right direction. Now scientists are able to know the starting point of miscarriages, and, with time, could potentially be used to provide mothers with predictions of risk. In order for the pregnancy to occur, the crossing over stage must ensure that the egg has the sufficient amount of chromosomes. These findings help humans know more about their anatomy to lead to better research.

This topic is very interesting. I know people who have had miscarriages so I am very curious about these findings. It does makes sense that genes that control chromosome interaction are related to aneuploidy since it occurs during crossing over. However, I would like to know why sometimes this crossing over implication occurs and if there will ever be prevention. Also, to what extent does the amount of error in recombination ensure a pregnancy loss will occur? There is still room for research and hopefully in the future, scientists will be able to prevent aneuploidy by being able to mediate recombination of chromosomes. 

Source:

https://www.livescience.com/health/fertility-pregnancy-birth/in-a-first-study-links-maternal-genes-to-risk-of-pregnancy-loss 

Another source specifically about crossing over:

https://www.genome.gov/genetics-glossary/Crossing-Over 

Brooke McMonagle

02/17/2026

Unlocking the Genetic Secrets of Bipolar Disorder

 

    A study published in Nature and highlighted by the National Institute of Mental Health (NIMH) reveals one of the most detailed genetic portraits of bipolar disorder to date. By examining DNA from more than 158,000 people diagnosed with bipolar disorder and nearly 2.8 million control participants from diverse ancestral backgrounds, researchers identified almost 300 genetic regions linked to the condition, an increase of more than four times over previous studies. This has expanded scientific understanding of the genetic architecture behind the disorder and offers clues for future, more personalized treatments. 

This study is significant because it includes participants from multiple ancestries (European, East Asian, African American, and Latino), which helps make the genetic findings more inclusive to diverse populations. Researchers identified 36 specific genes most likely linked to bipolar disorder, many of which overlap with genes involved in other mental conditions like schizophrenia and depression, suggesting shared biological pathways. The study supports the idea that many genes each contribute a small amount to overall risk, rather than a single “bipolar gene” causing the illness. One of the next scientific challenges is understanding why bipolar disorder presents so differently from person to person and how different genetic combinations influence specific subtypes of the illness. The findings could eventually lead to personalized treatments by revealing biological mechanisms different for each subtype. The study reinforces broader scientific knowledge that genetics play a significant role in bipolar disorder, but it also interacts with environmental factors and life experiences, taking into account the factors of nature and nurture in psychiatric conditions. 

https://www.nimh.nih.gov/news/science-updates/2025/study-illuminates-the-genetic-architecture-of-bipolar-disorder
https://en.wikipedia.org/wiki/Bipolar_disorder

#Genetics #MentalHealth #BipolarDisorder #GWAS #ScienceNews