Daniela Knoefler studies how exposure to specific stressors during early development influences an organism's ability to resist stress and live longer. Her work primarily involves investigating tiny creatures like worms, which show that temporary increases in reactive oxygen species (harmful molecules) can actually lead to better stress response and longer lifespans. This finding has important implications for humans, as it suggests that experiencing certain stressors early in life might help us develop greater resilience in the face of future challenges.
Key findings
Worms exposed to a temporary spike in reactive oxygen species experienced better stress resilience and increased lifespan.
The protective changes triggered by ROS exposure were shown to enhance the worms' ability to manage their internal chemistry.
Similar protective mechanisms observed in worms are also present in human cells, indicating a universal process across species.
Frequently asked questions
Does Dr. Knoefler study how stress affects lifespan?
Yes, she investigates the role of early-life stressors in increasing resilience and extending lifespan.
What organisms does Dr. Knoefler research?
She studies worms but also examines human cells to understand the underlying biological processes.
Is Dr. Knoefler's work relevant to people concerned about stress?
Yes, her research provides insights into how early stress exposure might prepare the body for better stress management later in life.
Publications in plain English
Automated phenotyping and lifespan assessment of amodel of Parkinson's disease.
2020
Translational medicine of aging
Kim M, Knoefler D, Quarles E, Jakob U, Bazopoulou D
Plain English This study examined the relationship between the buildup of a protein called alpha-synuclein in worms and their lifespan, specifically in a model of Parkinson's disease. The researchers discovered that while the amount and size of alpha-synuclein deposits varied significantly among the worms, this variation did not affect how long the worms lived. This finding is important because it indicates that the differences in protein deposits observed in Parkinson's disease models might not influence overall health or longevity.
Who this helps: This helps researchers and doctors better understand Parkinson's disease and its effects on aging.
Accumulation of Nucleolar Inorganic Polyphosphate Is a Cellular Response to Cisplatin-Induced Apoptosis.
2019
Frontiers in oncology
Xie L, Rajpurkar A, Quarles E, Taube N, Rai AS +5 more
Plain English This study looked at how cancer cells react to the chemotherapy drug cisplatin and found that they gather a compound called inorganic polyphosphate in response. They discovered that higher levels of this compound corresponded with increased cell death, indicating that polyphosphate plays a role in how cisplatin works. This is important because by boosting the levels of polyphosphate in cancer cells, it might be possible to make them more sensitive to cisplatin, improving treatment effectiveness.
Who this helps: This helps cancer patients undergoing cisplatin treatment.
Developmental ROS individualizes organismal stress resistance and lifespan.
2019
Nature
Bazopoulou D, Knoefler D, Zheng Y, Ulrich K, Oleson BJ +8 more
Plain English Researchers discovered that some worms naturally experience a temporary spike in harmful molecules called reactive oxygen species (ROS) early in development, which actually makes them stronger and longer-lived by triggering protective changes in how their genes are marked and regulated. These protective changes improve the worms' ability to handle stress and balance their internal chemistry, ultimately extending their lifespan. The same protective mechanism works in human cells too, suggesting that early-life stress exposure may program our bodies for greater resilience and longer life.
Do developmental temperatures affect redox level and lifespan in C. elegans through upregulation of peroxiredoxin?
2018
Redox biology
Henderson D, Huebner C, Markowitz M, Taube N, Harvanek ZM +2 more
Plain English This study looked at how different temperatures during the growth of tiny worms called C. elegans affect their lifespan. Researchers found that worms raised at a warmer temperature of 25°C and then moved to a cooler 15°C lived longer than those kept at 15°C the whole time. Specifically, the worms that experienced the temperature change had a better internal balance of certain chemicals, which seems to boost their lifespan, suggesting that temperature changes during early life can significantly benefit these worms.
Who this helps: This research helps scientists by providing insights into aging and could lead to better lifespan strategies in other organisms, including humans.
Polyphosphate: A Conserved Modifier of Amyloidogenic Processes.
2016
Molecular cell
Cremers CM, Knoefler D, Gates S, Martin N, Dahl JU +6 more
Plain English This study examined the role of polyphosphate (polyP), a simple molecule found in all living organisms, in the formation of amyloid fibrils, which are associated with diseases like Alzheimer's. The researchers found that polyP significantly speeds up the creation of these fibrils for different proteins, leading to increased stability and altered structures compared to those made without polyP. This is important because it affects how biofilms form in harmful bacteria and may reduce toxicity in nerve cells, providing insights for treating diseases linked to protein misfolding.
Who this helps: This helps patients with neurodegenerative disorders and infections caused by bacteria.
Bile salts act as effective protein-unfolding agents and instigators of disulfide stress in vivo.
2014
Proceedings of the National Academy of Sciences of the United States of America
Cremers CM, Knoefler D, Vitvitsky V, Banerjee R, Jakob U
Plain English This study looked at how bile salts, which help absorb fats and kill harmful bacteria in the human gut, cause problems for both good and bad bacteria. Researchers found that bile salts cause proteins in bacteria to unfold and clump together, leading to stress and damage which makes some bacterial strains more vulnerable. Notably, two common bile salts, cholate and deoxycholate, affect different proteins in ways that help explain how bile salts fight infections in the gut.
Who this helps: Patients with gastrointestinal issues.
About the dangers, costs and benefits of living an aerobic lifestyle.
2014
Biochemical Society transactions
Knoefler D, Leichert LI, Thamsen M, Cremers CM, Reichmann D +3 more
Plain English This study looked at reactive oxygen species (ROS), which were once thought of only as harmful substances in the body. Researchers found that while high levels of ROS can be toxic and contribute to diseases, they also play a vital role in fighting off infections and supporting cell growth and function. For example, a specific protein called Hsp33 is activated by ROS and helps regulate important cellular processes.
Who this helps: This research benefits patients by potentially leading to better treatments for infections and age-related diseases.
Quantitative in vivo redox sensors uncover oxidative stress as an early event in life.
2012
Molecular cell
Knoefler D, Thamsen M, Koniczek M, Niemuth NJ, Diederich AK +1 more
Plain English This research studied how oxidative stress, which is an imbalance between free radicals and antioxidants in the body, affects the lifespan of a tiny worm called C. elegans. The scientists found that these worms experience high levels of oxidants early in life, particularly during their larval stage, and then manage to reduce these levels as they grow older. Notably, worms that can quickly lower oxidant levels tend to live longer, whereas those that can't maintain higher levels of oxidants, suggesting that the ability to handle oxidative stress early on is crucial for longer life.
Who this helps: This helps scientists and researchers studying aging and oxidative stress-related health issues.