DNA
DNA (deoxyribonucleic acid) is the principal hereditary molecule in cellular organisms and many viruses.
DNA (deoxyribonucleic acid) is the principal hereditary molecule in cellular organisms and many viruses. It is a polymer of nucleotide units containing deoxyribose, phosphate, and one of four bases—adenine, thymine, cytosine, or guanine. Complementary base pairing between adenine–thymine and cytosine–guanine enables DNA to form a double-stranded helix and provides a mechanism for accurate replication. DNA sequences encode biological information used in the production and regulation of proteins and functional RNAs, while changes in DNA sequence or structure can influence cell behavior, disease susceptibility, and treatment response.
DNA is also an important biomedical target and experimental material. Its replication, topology, packaging, repair, and transcription can be altered by small molecules, proteins, and engineered nucleic-acid systems. Topoisomerase inhibitors, DNA-alkylating agents, and DNA-interacting compounds can produce strand stress, conformational changes, or DNA damage that contributes to apoptosis, cell-cycle arrest, and loss of cell viability. Conversely, cytosolic DNA can function as an innate immune signal through the cGAS–STING pathway. DNA sequence-specificity is additionally used in aptamer design, RNA:DNA hybrid detection, synthetic condensates, particle assembly, and high-throughput DNA engineering.
In research contexts, DNA is examined using methods including fluorescence, ultraviolet-visible spectroscopy, circular dichroism, Fourier-transform infrared spectroscopy (FTIR), mass spectrometry, and transmission electron microscopy. It is studied alongside RNA, microRNA, protein, extracellular vesicles, and biomarkers such as CD63 molecule and CD274 molecule. These applications span breast cancer and other malignancies, infectious disease, nucleic-acid quality control, and the design of programmable materials. Analytical performance may be assessed through sensitivity and detection limit, whereas therapeutic studies commonly evaluate cytotoxicity, IC50, reactive oxygen species, apoptosis, and cell-cycle arrest.
Rebuilt from PubMed 18 Sept 2026 · no new papers today
Where the papers sit
22 papers study dna directly. The themes below are drawn from those 22. 1 paradigm shift follows.
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Diverse DNA Applications : DNA appears across engineering, anticancer compounds, vaccine contamination assessment, molecular robotics, metabolic disease, and antiparasitic therapy, without a shared biological question or clear research direction. 11 papers · 50%
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Molecular Biomarkers in Immunity : Immune treatment and disease monitoring are moving toward biomarker-guided selection using ctDNA tumor fraction, liquid biopsy, methylation signatures, and advanced imaging. PD-L1 targeting, IFN-γ–TLR9 signaling, and macrophage reprogramming recur as routes to stronger antitumor immunity. 6 papers · 27.3%
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CRISPR-Cas12a Biosensing : CRISPR-Cas12a assays are moving toward rapid, amplification-free and ultrasensitive electrochemical detection. Recurring goals are high specificity, low detection limits, and discrimination of pathogens, species, and point mutations. 3 papers · 13.6%
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DNA-Programmed Soft Materials : DNA sequence and structure are being used to tune polyelectrolyte micelle morphology, condensate organization, and triggered liposome release. Imaging links molecular design to material stiffness and shape. 2 papers · 9.1%
DNA functions as an active, programmable material rather than merely as genetic information or a passive carrier scaffold
The polyelectrolyte-complex micelle study, the multispecific DNA-coating study, and the DNA-condensate liposome study found that DNA sequence, stiffness, hybridization, coating composition, and addressable base pairing directly control material morphology, particle assembly, compartment localization, and triggered cargo release (PMIDs 42734282, 42530495, 42429747). Together, these results replace the assumption that DNA can be treated generically within engineered carriers or assemblies: its molecular information is itself a physical control layer that determines higher-order structure and dynamic function.
Recent Findings on DNA
Precision Cancer Immunotherapy: ctDNA tumor fraction links disease burden and biology to treatment selection in advanced non-small cell lung cancer, while thyroid cancer reviews place ctDNA within multimodal monitoring 42440365Jul42725427Sep. Patients with ctDNA tumor fraction of at least 5% derived greater benefit from chemoimmunotherapy, whereas vobramitamab duocarmazine produced modest responses with substantial toxicity 42440365Jul42487497Jul. Preclinical nanoplatforms instead combine DNA damage, pyroptosis, ferroptosis, and STING activation to intensify antitumor immunity and suppress metastasis 42102776May41962221Apr. DNA sequence, hybridization structure, and stiffness determine polyelectrolyte complex micelle morphology, extending molecular profiling toward carrier design 42734282Sep. In SLE, metabolite changes correlated with DNA methylation at immune-related loci, although metabolite identities and associations require confirmation 42731887Sep. Future work is therefore combining liquid biopsy, molecular panels, imaging, and engineered nanocarriers for more selective treatment decisions 42725427Sep42440365Jul.
Programmable DNA Materials: SCRIVENER uses bacterial conjugation, in vivo DNA cutting, and homologous recombination to assemble large constructs with high throughput and high fidelity 42385708Jul. Multispecific DNA coatings exposed a trade-off between flexible grafting methods and precise composition, while reversible interactions limited equilibrium co-assembly 42530495Jul. DNA condensates and DNA molecular robots use sequence-specific interactions or allosteric switches to organize liposomes, release cargo, and generate mechanical forces for osteosarcoma therapy and bone regeneration 42429747Jul42734289Sep. A critical analysis reached the opposite safety conclusion for residual DNA in mRNA vaccines, arguing that methodological flaws underestimated contamination 42599093Aug. Programmable DNA materials are consequently moving toward scalable construction, sequential assembly, dynamic cargo handling, and more rigorous analytical validation 42385708Jul42530495Jul42429747Jul.
CRISPR-Cas12a Biosensing: Cas12a trans-cleavage of immobilized DNA reporters provides the shared signal-generating mechanism in amplification-free electrochemical biosensors 42242806Jun42127676May. The nanopipette sensor identified Salmo salar DNA in tissue sections through ion current rectification, whereas the Clostridioides difficile assay measured tcdB DNA amperometrically 42242806Jun42127676May. Both platforms achieved pM-level detection with high specificity, reproducibility, and stability. Their development is moving toward rapid, low-pretreatment, in situ or point-of-care pathogen discrimination 42242806Jun42127676May.
Topoisomerase inhibition, DNA binding, and DNA damage repeatedly produced cell-cycle arrest, mitochondrial dysfunction, and apoptosis in experimental disease models 42498008Jul42640499Aug42401165Jul. Nalidixic acid showed stronger antiparasitic activity against Giardia intestinalis than enoxacin or norfloxacin, while harmaline inhibited triple-negative breast cancer cells at an IC50 of 99.53 µM 42498008Jul42640499Aug. Selenium-matrine compounds 5l and 5n strengthened Topo I-DNA interactions, increased reactive oxygen species, and showed anticancer activity, with 5n demonstrating acceptable preliminary in vivo safety 42401165Jul. Westernized diet-induced insulin resistance expanded a DNA-mismatch-prone quiescent stem-cell compartment, whereas TAPIR increased rRNA transcription, protein synthesis, and neural stem-cell self-renewal 42736265Sep42391322Jul. Jianpi Qinghua Granule linked DNMT1 and DNMT3A regulation to DNA methylation, urea-cycle restoration, and improved metabolic dysfunction-associated fatty liver disease in mice 42107753May. These findings are advancing toward mechanism-based interventions spanning DNA topology, epigenetic regulation, metabolism, and stem-cell behavior.
Written from 22 PubMed abstracts, each one cited by PMID above. Published: 2026-09-02. Last written: 2026-09-16 by GPT. Drafted by language models from published abstracts; not medical advice.