Results 41 to 50 of about 18,515 (223)

Chromatin determinants impart camptothecin sensitivity [PDF]

open access: yes, 2017
Camptothecin-induced locking of topoisomerase 1 on DNA generates a physical barrier to replication fork progression and creates topological stress. By allowing replisome rotation, absence of the Tof1/Csm3 complex promotes the conversion of impending ...

core   +3 more sources

Supplementary data for the quantum chemical calculation of free radical substitution reaction mechanism of camptothecin

open access: yesData in Brief, 2018
This data article contains the truncated view of the transition states for methyl radical attacking camptothecin at the site of 9, 10, 11, 12 and 14 in acidic conditions obtained from quantum computation of Gaussian 09 with B3LYP/6–31+G(d,p) level, also ...
Yujie Dai   +8 more
doaj   +1 more source

Camptothecin Delivery via Tumor-Derived Exosome for Radiosensitization by Cell Cycle Regulation on Patient-Derived Xenograft Mice

open access: yesFrontiers in Bioengineering and Biotechnology, 2022
Purpose: While radiotherapy remains the leading clinical treatment for many tumors, its efficacy can be significantly hampered by the insensitivity of cells in the S phase of the cell cycle to such irradiation.Methods: Here, we designed a highly targeted
Yiling Yang   +6 more
doaj   +1 more source

DNA Topoisomerase 1 Structure-BASED Design, Synthesis, Activity Evaluation and Molecular Simulations Study of New 7-Amide Camptothecin Derivatives Against Spodoptera frugiperda

open access: yesFrontiers in Chemistry, 2018
Camptothecin and its derivatives (CPTs) have strong toxicity to eukaryotic cells by targeting their DNA topoisomerase 1 (Top1) protein and have been increasingly explored as potential pesticides for plant protection.
Zhiyan Jiang   +6 more
doaj   +1 more source

Injectable hyaluronic acid hydrogels encapsulating drug nanocrystals for long‐term treatment of inflammatory arthritis

open access: yesBioengineering & Translational Medicine, 2022
Antiproliferative chemotherapeutic agents offer a potential effective treatment for inflammatory arthritis. However, their clinical application is limited by high systemic toxicity, low joint bioavailability as well as formulation challenges.
Yongsheng Gao   +9 more
doaj   +1 more source

Synthesis and in Vivo Antitumor Activity of Poly(l-glutamic acid) Conjugates of 20(S)-Camptothecin

open access: yes, 2016
Poly-α-(l-glutamic acid) (PG) conjugates of 20(S)-camptothecin (1, CPT) displayed improved aqueous solubility compared to CPT, were stable in aqueous solution at neutral pH, and were potent antitumor agents in vivo. Evaluation of PG molecular weight, CPT
Peter Klein (463828)   +6 more
core   +1 more source

Discovering and harnessing camptothecin hydroxylase enzymes in Camptotheca acuminata for chemoenzymatic synthesis of anticancer camptothecin derivatives

open access: yes, 2021
Since the 1990s, topotecan and irinotecan, two camptothecin derivatives, have been widely used as anticancer drugs owing to their phenomenal topoisomerase-I inhibitory activity.
Nguyen, Minh Tuan Anh
core   +1 more source

UiO‐66 metal–organic frameworks in biomedicine: From structural tunability to bioimaging, photodiagnostics, and photodynamic cancer therapy

open access: yesFEBS Open Bio, EarlyView.
UiO‐66(Zr) metal–organic frameworks are chemically stable, biocompatible, and highly tunable nanomaterials. Their modular structure enables controlled drug delivery, multimodal bioimaging, and light‐activated photodynamic therapy, supporting integrated diagnostic and therapeutic (theranostic) applications in cancer and biomedical research.
Veronika Huntošová   +2 more
wiley   +1 more source

Malformin A1–mediated cytotoxicity in ovarian cancer cells occurs through pyroptosis and autophagy

open access: yesFEBS Open Bio, EarlyView.
This study investigated the effects of the natural compound Malformin A1 (MA1) on the cytoskeleton that regulates cell proliferation and migration. Disruption of the cytoskeleton can impair these processes and promote cancer cell death. MA1 disrupted cytoskeletal organization, induced DNA damage, inflammation, activated autophagy, and pyroptosis ...
Nada Abdullah Hassan   +11 more
wiley   +1 more source

Addition of Ester Enolates to N-Alkyl-2-fluoropyridinium Salts:  Total Synthesis of (±)-20-Deoxycamptothecin and (+)-Camptothecin

open access: yes, 2016
Several 4-substituted dihydropyridones or 2-pyridones have been prepared by nucleophilic addition of α-(methylsulfanyl)ester enolates to N-alkyl-2-fluoropyridinium salts, followed by acid hydrolysis or oxidation with concomitant hydrolysis, of the ...
M.-Lluïsa Bennasar (2489200)   +4 more
core   +1 more source

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