FOXO4-DRI

Nature communications · 2025

Researchers studied how a specific protein interaction involving FOXO4 and p53 contributes to aging by affecting cellular senescence. They discovered that a peptide called FOXO4-DRI can selectively target and impact these senescent cells. This research provides insights into the molecular mechanisms behind aging and potential therapeutic approaches.

• Researchers found that the FOXO4-p53 interaction is crucial for the survival of senescent cells.
• The study identified FOXO4-DRI as a compound that can selectively target these cells.
• Structural models revealed how FOXO4-DRI binds to the p53 protein, providing insights into their interaction.

Communications biology · 2025

Researchers studied keloids, which are aggressive scars that often recur, and found that certain fibroblast cells in these scars show signs of aging and inflammation. They discovered that a peptide called FOXO4-DRI can promote the death of these aging cells, potentially reducing the severity and recurrence of keloids.

• Researchers observed an increase in aging and inflammatory fibroblast cells in keloids.
• The study found elevated levels of specific proteins associated with cellular aging in keloid tissues.
• FOXO4-DRI was shown to effectively induce the death of aging fibroblasts, suggesting a new approach to manage keloids.

Frontiers in bioengineering and biotechnology · 2025

Researchers observed that FOXO4-DRI, a new peptide, can selectively eliminate aging endothelial cells, which are crucial for blood vessel health. This study found that FOXO4-DRI improves vascular function and slows down the aging process in blood vessels by activating a specific cellular pathway that leads to the death of these senescent cells.

• FOXO4-DRI effectively improves aortic function and reduces signs of vascular aging in aged mice.
• The peptide works by disrupting the interaction between FOXO4 and P53, leading to the apoptosis of senescent endothelial cells.
• FOXO4-DRI enhances endothelial cell function even after stress conditions, such as oxygen-glucose deprivation.

Experimental gerontology · 2024

Researchers studied how a compound called FOXO4-DRI affects aging male mice and their sperm production. They found that FOXO4-DRI can help eliminate old, dysfunctional cells in the testes, leading to improved sperm quality and better overall spermatogenesis in these aged mice.

• FOXO4-DRI induced the death of senescent Leydig cells, which are important for sperm production.
• The treatment reduced harmful substances secreted by these aging cells.
• Aged mice treated with FOXO4-DRI showed increased sperm quality and improved spermatogenesis.

Naunyn-Schmiedeberg's archives of pharmacology · 2023

Researchers studied the effects of a peptide called FOXO4-D-Retro-Inverso on pulmonary fibrosis, a condition characterized by lung scarring. They found that this peptide reduced lung damage and collagen buildup in mice, suggesting it may be a promising approach for managing this serious lung disease.

• Researchers observed milder lung damage and less collagen deposition in mice treated with FOXO4-D-Retro-Inverso compared to untreated mice.
• The study found that FOXO4-D-Retro-Inverso altered the distribution of a protein called p53 in lung cells.
• Researchers noted a decrease in total extracellular matrix proteins in the lungs of mice treated with FOXO4-D-Retro-Inverso.

Circulation · 2023

Researchers studied the role of senescent cells in patients with pulmonary arterial hypertension and found that these cells are more prevalent in their lungs compared to healthy individuals. The study observed that eliminating these senescent cells could potentially worsen the condition of the pulmonary blood vessels, suggesting a complex relationship between cell aging and pulmonary hypertension.

• Patients with pulmonary arterial hypertension showed higher levels of senescent cell markers in their lungs compared to healthy controls.
• In animal models, eliminating senescent cells led to worsened pulmonary blood flow dynamics.
• The study highlights the need for caution when considering treatments aimed at reducing senescent cells in pulmonary hypertension.

Journal of cellular and molecular medicine · 2022

Researchers studied the effects of a synthetic peptide called FOXO4-DRI on pulmonary fibrosis in mice, a serious lung disease. They found that FOXO4-DRI reduced harmful senescent cells and improved lung structure, suggesting it may be a promising treatment option for this condition.

• FOXO4-DRI decreased the number of senescent cells and reduced inflammation in the lungs of mice with pulmonary fibrosis.
• The peptide improved lung structure by increasing healthy cell types and decreasing harmful myofibroblasts.
• FOXO4-DRI was shown to disrupt pathways associated with extracellular matrix interactions, which are important in the progression of pulmonary fibrosis.

JCI insight · 2021

Researchers observed that certain fibroblasts in the lung cancer environment become resistant to radiation therapy. By targeting these fibroblasts, they found a way to enhance the effectiveness of radiation treatment for non-small cell lung cancer and reduce lung damage caused by radiation. This study highlights a new approach to improve cancer treatment outcomes and minimize side effects.

• Researchers found that senescence-like fibroblasts promote resistance to radiation in non-small cell lung cancer.
• The use of a specific peptide, FOXO4-DRI, effectively induced death in these fibroblasts, enhancing the sensitivity of cancer cells to radiation.
• The study also showed that targeting these fibroblasts reduced lung damage associated with radiation therapy.

Frontiers in bioengineering and biotechnology · 2021

Researchers studied a peptide called FOXO4-DRI, which is designed to target and remove aging cells from the body. This study observed its potential in improving the effectiveness of autologous chondrocyte implantation (ACI), a procedure used to repair cartilage injuries and may help prevent osteoarthritis.

• Researchers found that FOXO4-DRI selectively eliminates senescent cells.
• The study observed that removing these cells could enhance the outcomes of cartilage repair procedures.
• This research suggests a new approach to improve treatments for cartilage injuries and related conditions.

Aging · 2020

Researchers studied the role of FOXO4 in age-related testosterone deficiency by focusing on senescent Leydig cells in older mice. They found that the presence of FOXO4 in these cells is linked to reduced testosterone production, suggesting that targeting these senescent cells could help restore hormone levels in aging males.

• Researchers observed that FOXO4 is specifically expressed in human Leydig cells.
• They found that the movement of FOXO4 to the nucleus in older individuals correlates with lower testosterone synthesis.
• The study indicates that eliminating senescent Leydig cells may improve testosterone levels in aging tissues.