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Biology subjects

Divakaruni, A.

Publications and source records attributed to Divakaruni, A..

2 recordsLinked to original sources

AI-qualizing Science

Scientific discovery remains highly concentrated among elite universities due to unequal access to infrastructure, expertise, and collaboration networks. We investigate whether artificial intelligence can mitigate these disparities by studying AlphaFold, a deep learning system awarded the 2024 Nobel Prize in Chemistry for its transformative impact on protein structure predictions. Using publication data from top journals and universities worldwide, we show that lower-ranked institutions increased their share of high-impact protein research by up to five percentage points within two years of AlphaFolds public release. These gains are specific to protein domains and absent in non-protein fields or lower-tier journals. We further document enhanced research novelty, directional pivoting, and citation impact among lower-tier institutions, alongside reduced dependence on collaborations with top-ranked partners. By broadening participation in frontier protein science, AlphaFold exemplifies how open-access AI tools can disrupt entrenched hierarchies in research. This democratizing effect has far-reaching implications as similar AI systems emerge in other complex domains such as genomics, materials science, and climate modeling.

bioinformatics↗

Lipid availability influences the metabolic maturation of human pluripotent stem cell-derived cardiomyocytes

ObjectivesPluripotent stem cell-derived cardiomyocytes are phenotypically immature, which limits their utility in downstream applications. Metabolism is dramatically reprogramed during cardiac maturation in vivo and presents a potential avenue to drive in vitro maturation. We aimed to identify and address metabolic bottlenecks in the generation of human pluripotent stem cell (hPSC)-derived cardiomyocytes. MethodshPSCs were differentiated into cardiomyocytes using an established, chemically-defined differentiation protocol. We applied 13C metabolic flux analysis (MFA) and targeted transcriptomics to characterize cardiomyocyte metabolism in during differentiation in the presence or absence of exogenous lipids. ResultshPSC-derived cardiomyocytes induced some cardiometabolic pathways (i.e. ketone body and branched-chain amino acid oxidation) but failed to effectively activate fatty acid oxidation. MFA studies indicated that lipid availability in cultures became limited during differentiation, suggesting potential issues with nutrient availability. Exogenous supplementation of lipids improved cardiomyocyte morphology, mitochondrial function, and promoted increased fatty acid oxidation in hPSC-derivatives. ConclusionhPSC-derived cardiomyocytes are dependent upon exogenous sources of lipids for metabolic maturation. Proper supplementation removes a potential roadblock in the generation of metabolically mature cardiomyocytes. These studies further highlight the importance of considering and exploiting metabolic phenotypes in the in vitro production and utilization of functional hPSC-derivatives.

cell biology↗