Archive · 2 Oct 2026
Vitamin D Deficiency Linked to Cellular Stress in Heart
An ICMR-NIN study found that low or deficient vitamin D increased oxidative damage in rat heart tissue.
Vitamin D-deficient rats had lower glutathione levels and reduced activity of key antioxidant enzymes.
The deficiency affected the Nrf2 pathway and increased markers of endoplasmic reticulum stress, autophagy and apoptosis.
In rat cardiac-cell experiments, active vitamin D improved antioxidant responses and reduced stress-related changes and cell death.
Researchers said the findings are pre-clinical and require further investigation in humans.
- Who
- Researchers at the ICMR-National Institute of Nutrition in Hyderabad, led by Dr Ayesha Ismail, with comments from Dr Bharati Kulkarni.
- What
- A pre-clinical study examined how vitamin D deficiency affects oxidative stress, cellular stress and injury in heart tissue.
- When
- The study was published in the journal Steroids; the publication date was not stated.
- Where
- At the ICMR-National Institute of Nutrition in Hyderabad, using rats and rat cardiac cells.
- Why
- Researchers sought to understand how vitamin D levels influence antioxidant defenses and cellular processes linked to heart-cell damage.
Possible Cardiac Protection
Human Evidence Needed
Interpretation of the findings
Possible Cardiac Protection
Researchers said adequate vitamin D may improve cardiac cells’ antioxidant responses and help limit cellular damage.
Human Evidence Needed
Researchers emphasized that the study does not establish whether the same effects occur in people because it used rat and laboratory cell models.
Implications for people
Possible Cardiac Protection
Dr Ayesha Ismail said individuals should keep a check on their vitamin D levels, while clinical studies are also being conducted.
Human Evidence Needed
The findings are still at the pre-clinical mechanism stage, so further human research is needed before firm conclusions can be drawn.
- Research institution
- ICMR-National Institute of Nutrition, Hyderabad
- Study title
- Vitamin D mitigates oxidative and endoplasmic reticulum stress and protects cardiac tissue from apoptotic cell death in vivo and in vitro
- Journal
- Steroids
- Models used
- Rats and rat cardiac cells
- Effects of deficiency
- Increased oxidative damage, reduced glutathione and lower activity of key antioxidant enzymes
- Cellular pathways observed
- Nrf2, endoplasmic reticulum stress, autophagy and apoptosis
- Research limitation
- The findings came from animal and cell models and require further human investigation
