Tag: 249.2194

Acidic pH-Triggered Drug-Eluting Nanocomposites for Magnetic Resonance Imaging-Monitored Intra-arterial Drug Delivery to Hepatocellular Carcinoma was written by Park, Wooram;Chen, Jeane;Cho, Soojeong;Park, Sin-jung;Larson, Andrew C.;Na, Kun;Kim, Dong-Hyun. And the article was included in ACS Applied Materials & Interfaces in 2016.Product Details of 13590-42-6 This article mentions the following:

Transcatheter hepatic intra-arterial (IA) injection has been considered as an effective targeted delivery technique for hepatocellular carcinoma (HCC). Recently, drug-eluting beads (DEB) were developed for transcatheter IA delivery to HCC. However, the conventional DEB has offered relatively modest survival benefits. It can be difficult to control drug loading/release from DEB and to monitor selective delivery to the targeted tumors. Embolized DEBs in hepatic arteries frequently induce hypoxic and low pH conditions, promoting cancer cell growth. In this study, an acidic pH-triggered drug-eluting nanocomposite (pH-DEN) including superparamagnetic iron oxide nanocubes and pH-responsive synthetic peptides with lipid tails [octadecylamine-p(API-L-Asp)₁₀] was developed for magnetic resonance imaging (MRI)-monitored transcatheter delivery of sorafenib (the only FDA-approved systemic therapy for liver cancer) to HCC. The synthesized sorafenib-loaded pH-DENs exhibited distinct pH-triggered drug release behavior at acidic pH levels and highly sensitive MR contrast effects. In an orthotopic HCC rat model, successful hepatic IA delivery and distribution of sorafenib-loaded pH-DEN was confirmed with MRI. IA-delivered sorafenib-loaded pH-DENs elicited significant tumor growth inhibition in a rodent HCC model. These results indicate that the sorafenib-pH-DENs platform has the potential to be used as an advanced tool for liver-directed IA treatment of unresectable HCC. In the experiment, the researchers used many compounds, for example, (S)-Benzyl 2-(2,5-dioxooxazolidin-4-yl)acetate (cas: 13590-42-6Product Details of 13590-42-6).

(S)-Benzyl 2-(2,5-dioxooxazolidin-4-yl)acetate (cas: 13590-42-6) belongs to oxazolidine derivatives. Oxazolidine-based compounds are well-known chiral auxiliaries and strategic molecular moieties in chemistry since they can effectively mask or mimic amino acid units or amino alcohols. Oxazolidines are commonly used as metal ligands in asymmetric catalysis, synthetic intermediates in organic synthesis, and also used as the protecting groups.Product Details of 13590-42-6

Referemce:
Oxazolidine – Wikipedia,
Oxazolidine | C3H7NO – PubChem

Synthesis of mechanically robust renewable poly(ester-amide)s through co-polymerisation of unsaturated polyesters and synthetic polypeptides was written by Brannigan, Ruairi P.;Heise, Andreas. And the article was included in European Polymer Journal in 2020.Related Products of 13590-42-6 This article mentions the following:

As an alternative to polyester-based materials, synthetic polypeptides have received a great deal of attention as bio-derived polymers for various applications. Polypeptide-based materials offer numerous advantages over traditional polyesters such as efficient and complete bio- and ecol. absorption, however, poor mech. robustness and low processability has prevented the com. application of polypeptides. Conversely, copolymers of polyesters and polypeptides have the potential to combine the mech. versatility of aliphatic polyesters while retaining the enhanced bio-absorption of polypeptides. Itaconic acid-based polyesters were crosslinked with modified telechelic poly(L-aspartic acid β-benzyl ester) and the amino acid-derived 2-vinyl-4,4-dimethylazlactone in order to assess their effect on their bulk materials properties. It was found that through variance of the polymer composition that the mech. properties and the hydrolytic degradation of the materials could be modulated. We believe that these crosslinked polymers offer a unique platform for the development of sustainable degradable materials. In the experiment, the researchers used many compounds, for example, (S)-Benzyl 2-(2,5-dioxooxazolidin-4-yl)acetate (cas: 13590-42-6Related Products of 13590-42-6).

(S)-Benzyl 2-(2,5-dioxooxazolidin-4-yl)acetate (cas: 13590-42-6) belongs to oxazolidine derivatives.Oxazolidines are readily available also from propargyl amines. In another report, the incorporation of an additional substituted oxazolidine ring over a range of new biphenylazepinium salt organocatalysts for the asymmetric epoxidation of alkenes improved enantiocontrol over the parent structures.Related Products of 13590-42-6

Referemce:
Oxazolidine – Wikipedia,
Oxazolidine | C3H7NO – PubChem

Polymeric micelles encapsulating pH-responsive doxorubicin prodrug and glutathione-activated zinc(II) phthalocyanine for combined chemotherapy and photodynamic therapy was written by Gao, Di;Lo, Pui-Chi. And the article was included in Journal of Controlled Release in 2018.Related Products of 13590-42-6 This article mentions the following:

A series of polymeric micelles encapsulating different ratios of doxorubicin and zinc(II) phthalocyanine have been prepared for dual chemotherapy and photodynamic therapy. The amphiphilic block copolymers consist of methoxypolyethylene glycol and poly(β-benzyl-L-aspartate), in which DOX and ZnPc were conjugated to the aspartate side chain through an acid-labile hydrazone linker and a redox-responsive disulfide linker, resp. The polymers were self-assembled into spherical polymeric micelles with diameters of about 160-180 nm and their surface charges were found to be nearly neutral due to the outermost PEG layer. These polymeric micelles exhibited excellent stability and silenced fluorescence in aqueous media. The controlled release of DOX and ZnPc was studied in phosphate solution under acidic and reducing environments, resp. In vitro study demonstrated that these polymeric micelles could be internalized into HepG2 human hepatocellular carcinoma cells, showing the fluorescence of DOX in the nucleus and fluorescence of ZnPc in the cytoplasm. This observation suggested that the acidic and reducing intracellular environments could trigger the release of DOX and ZnPc by cleaving the corresponding linkers. These micelles exhibited different degree of dark- and photo-cytotoxicity on the HepG2 cells due to the chemocytotoxic DOX and the singlet oxygen generated upon irradiation of the ZnPc. With a certain ratio of DOX and ZnPc, they caused a synergistic cytotoxicity as calculated by combination index. The DOX-ZnPc-micelles-2, which has a DOX/ZnPc molar ratio of 3.8, could induce cell death mainly through apoptosis and exhibit preferential tumor retention in tumor-bearing mice via the enhanced permeability and retention effect. The results suggest that these polymeric micelles are promising nanoplatforms for the delivery of anticancer drugs and photosensitizers for dual therapy. In the experiment, the researchers used many compounds, for example, (S)-Benzyl 2-(2,5-dioxooxazolidin-4-yl)acetate (cas: 13590-42-6Related Products of 13590-42-6).

(S)-Benzyl 2-(2,5-dioxooxazolidin-4-yl)acetate (cas: 13590-42-6) belongs to oxazolidine derivatives. Oxazolidines that are the precursor to bisoxazolidines are in effect mono-oxazolidines. They are also used as moisture scavengers in polyurethane and other systems. Oxazolidines are cyclic condensation products of β-amino alcohols and aldehydes or ketone, and they undergo a facile and complete hydrolysis in aqueous solution. Alterations in carbonyl moiety control the rate of formation of a given β-amino alcohol. Oxazolidines are weaker bases (pKa 6–7) than parent β-amino alcohols and found to be more lipophilic than the parent compound at physiological pH.Related Products of 13590-42-6

Referemce:
Oxazolidine – Wikipedia,
Oxazolidine | C3H7NO – PubChem

Sustained release of peptides and proteins from polymeric nanocarriers produced by inverse Flash NanoPrecipitation was written by Markwalter, Chester E.;Pagels, Robert F.;Hejazi, Ava N.;Ristroph, Kurt D.;Wang, Jiping;Chen, Ke;Li, Jian;Prud′homme, Robert K.. And the article was included in Journal of Controlled Release in 2021.Recommanded Product: 13590-42-6 This article mentions the following:

Peptide and protein therapeutics generally exhibit high potency and specificity and are increasingly important segments of the pharmaceutical market. However, their clin. applications are limited by rapid clearance and poor membrane permeability. Encapsulation of the peptide or protein into a nano-scale carrier can modify its pharmacokinetics and biodistribution. This might be employed to promote uptake in desired cell types or tissues, to limit systemic exposure, or to reduce the need for frequent injections. We have recently described inverse Flash NanoPptn. (iFNP), a scalable technique to encapsulate water-soluble therapeutics into polymeric nanocarriers, and have demonstrated improvements in therapeutic loading of an order of magnitude over comparable approaches. Here, we describe the formulation parameters that control release rates of encapsulated model therapeutics polymyxin B, lysozyme, and bovine serum albumin from nanocarriers produced using iFNP. Using a neutropenic lung infection mouse model with a multi-drug resistant Acinetobacter baumannii clin. isolate, we demonstrate enhanced therapeutic effect and safety profile afforded by nanocarrier-encapsulated polymyxin B following pulmonary administration. The encapsulated formulation reduced toxicity observed at elevated doses and resulted in up to 2.7-log10 reduction in bacterial burden below that of unencapsulated polymyxin B. These results establish the promise of iFNP as a platform for nanocarrier delivery of water-soluble therapeutics. In the experiment, the researchers used many compounds, for example, (S)-Benzyl 2-(2,5-dioxooxazolidin-4-yl)acetate (cas: 13590-42-6Recommanded Product: 13590-42-6).

(S)-Benzyl 2-(2,5-dioxooxazolidin-4-yl)acetate (cas: 13590-42-6) belongs to oxazolidine derivatives. Oxazolidines are well known as key portions of bioactive molecules or precursors of chiral molecules, as well as established chiral auxiliaries. Oxazolidines are cyclic condensation products of β-amino alcohols and aldehydes or ketone, and they undergo a facile and complete hydrolysis in aqueous solution. Alterations in carbonyl moiety control the rate of formation of a given β-amino alcohol.Recommanded Product: 13590-42-6

Referemce:
Oxazolidine – Wikipedia,
Oxazolidine | C3H7NO – PubChem

Dual pH/ROS-Responsive Nanoplatform with Deep Tumor Penetration and Self-Amplified Drug Release for Enhancing Tumor Chemotherapeutic Efficacy was written by Li, Yongfei;Chen, Mie;Yao, Bowen;Lu, Xun;Song, Boyang;Vasilatos, Shauna N.;Zhang, Xiang;Ren, Xiaomei;Yao, Chang;Bian, Weihe;Sun, Lizhu. And the article was included in Small in 2020.Application In Synthesis of (S)-Benzyl 2-(2,5-dioxooxazolidin-4-yl)acetate This article mentions the following:

Poor deep tumor penetration and incomplete intracellular drug release remain challenges for antitumor nanomedicine application in clin. settings. Herein, a nanomedicine (RLPA-NPs) is developed that can achieve prolonged blood circulation, deep tumor penetration, active-targeting of cancer cells, endosome/lysosome escape, and intracellular selectivity self-amplified drug release for effective drug delivery. The RLPA-NPs are constructed by encapsulation of a pH-sensitive polymer octadecylamine-poly(aspartate-1-(3-aminopropyl) imidazole) (OA-P(Asp-API)) and a ROS-generation agent, β-Lapachone (Lap), in micelles assembled by the tumor-penetration peptide internalizing RGD (iRGD)-modified ROS-responsive paclitaxel (PTX)-prodrug. iRGD could promote RLPA-NPs penetration into deep tumor tissue, and specific targeting to cancer cells. After internalization by cancer cells through receptor-mediated endocytosis, OA-P(Asp-API) can rapidly protonate in the endosome’s acidic environment, resulting in RLPA-NPs escape from the endosome through the “proton sponge effect”. At the same time, the RLPA-NPs micelle disassembles, releasing Lap and PTX-prodrug. Subsequently, the released Lap could generate ROS, consequently amplifying and accelerating PTX release to kill tumor cells. The in vitro and in vivo studies demonstrated that RLPA-NPs can significantly improve the therapeutic effect compared to control groups. Therefore, RLPA-NPs are a promising nanoplatform for overcoming multiple physiol. and pathol. barriers to enhance drug delivery. In the experiment, the researchers used many compounds, for example, (S)-Benzyl 2-(2,5-dioxooxazolidin-4-yl)acetate (cas: 13590-42-6Application In Synthesis of (S)-Benzyl 2-(2,5-dioxooxazolidin-4-yl)acetate).

(S)-Benzyl 2-(2,5-dioxooxazolidin-4-yl)acetate (cas: 13590-42-6) belongs to oxazolidine derivatives. Oxazolidine-based compounds are well-known chiral auxiliaries and strategic molecular moieties in chemistry since they can effectively mask or mimic amino acid units or amino alcohols. As well as other multifunctional heterocyclic compounds, oxazolidine rings play an essential role in organic and medicinal chemistry, behaving, in some cases as powerful antitumor agents.Application In Synthesis of (S)-Benzyl 2-(2,5-dioxooxazolidin-4-yl)acetate

Referemce:
Oxazolidine – Wikipedia,
Oxazolidine | C3H7NO – PubChem

Engineering bio-inspired peptide-polyurea hybrids with thermo-responsive shape memory behavior was written by Jang, Daseul;Thompson, Chase B.;Chatterjee, Sourav;Korley, LaShanda T. J.. And the article was included in Molecular Systems Design & Engineering in 2021.Recommanded Product: (S)-Benzyl 2-(2,5-dioxooxazolidin-4-yl)acetate This article mentions the following:

Inspired by Nature’s tunability driven by the modulation of structural organization, we utilize peptide motifs as an approach to tailor not only hierarchical structure, but also thermo-responsive shape memory properties of conventional polymeric materials. Specifically, poly(β-benzyl-L-aspartate)-b-poly(dimethylsiloxane)-b-poly(β-benzyl-L-aspartate) was incorporated as the soft segment in peptide-polyurea hybrids to manipulate hierarchical ordering through peptide secondary structure and a balance of inter- and intra-mol. hydrogen bonding. Employing these bioinspired peptidic polyureas, we investigated the influence of secondary structure on microphase-separated morphol., and shape fixity and recovery via attenuated total reflectance-Fourier transform IR spectroscopy (ATR-FTIR), small-angle X-ray scattering (SAXS) and dynamic mech. anal. (DMA). The β-sheet motifs promoted phase mixing through extensive inter-mol. hydrogen bonding between the hard block and peptide segments and provided an increased chain elasticity, resulting in decreased shape fixity compared to a non-peptidic control. In contrast, intra-mol. hydrogen bonding driven by the α-helical arrangements yielded a microphase-separated and hierarchically ordered morphol., leading to an increase in the shape fixing ratio. These results indicate that peptide secondary structure provides a convenient handle for tuning shape memory properties by regulating hydrogen bonding with the surrounding polyurea hard segment, wherein extent of hydrogen bonding and phase mixing between the peptidic block and hard segment dictate the resulting shape memory behavior. Furthermore, the ability to shift secondary structure as a function of temperature also was demonstrated as a pathway to influence shape memory response. This research highlights that peptide secondary conformation influences the hierarchical ordering and modulates the shape memory response of peptide-polymer hybrids. We anticipate that these findings will enable the design of smart bio-inspired materials with responsive and tailored function via a balance of hydrogen bonding character, structural organization, and mechanics. In the experiment, the researchers used many compounds, for example, (S)-Benzyl 2-(2,5-dioxooxazolidin-4-yl)acetate (cas: 13590-42-6Recommanded Product: (S)-Benzyl 2-(2,5-dioxooxazolidin-4-yl)acetate).

(S)-Benzyl 2-(2,5-dioxooxazolidin-4-yl)acetate (cas: 13590-42-6) belongs to oxazolidine derivatives. Oxazolidines that are the precursor to bisoxazolidines are in effect mono-oxazolidines. They are also used as moisture scavengers in polyurethane and other systems. Oxazolidines are commonly used as metal ligands in asymmetric catalysis, synthetic intermediates in organic synthesis, and also used as the protecting groups.Recommanded Product: (S)-Benzyl 2-(2,5-dioxooxazolidin-4-yl)acetate

Referemce:
Oxazolidine – Wikipedia,
Oxazolidine | C3H7NO – PubChem

Messenger RNA loading into ATP-responsive polyplex micelles with optimal density of phenylboronate ester crosslinking to balance robustness in the biological milieu and intracellular translational efficiency was written by Yoshinaga, Naoto;Uchida, Satoshi;Dirisala, Anjaneyulu;Naito, Mitsuru;Osada, Kensuke;Cabral, Horacio;Kataoka, Kazunori. And the article was included in Journal of Controlled Release in 2021.Safety of (S)-Benzyl 2-(2,5-dioxooxazolidin-4-yl)acetate This article mentions the following:

Carriers for mRNA (mRNA) delivery require propensities to protect the mRNA from enzymic degradation and to selectively release mRNA in the cytosol for smooth mRNA translation. To meet these requirements, we designed mRNA-loaded polyplex micelles (PMs) with ATP-responsive crosslinking in the inner core by complexing mRNA with poly(ethylene glycol)-polycation block copolymers derivatized with phenylboronic acid and polyol groups, which form crosslinking structures via spontaneous phenylboronate ester formation. PMs thus prepared are tolerable against enzymic attack and, in turn, disintegrate in the cytosol to release mRNA when triggered by the cleavage of phenylboronate ester linkages in response to elevated ATP concentration Two structural factors of the PM, including (i) the introduction ratios of phenylboronate ester crosslinkers and (ii) the structure and protonation degree of amino groups in the polycation segment, are critical for maximizing protein expression in cultured cells due to the optimized balance between the robustness in the biol. milieu and the ATP-responsive mRNA release in the cytosol. The optimal PM formulation was further stabilized by installing cholesterol moieties into both the mRNA and ω-end of the block copolymer to elicit longevity in blood circulation after i.v. injection. In the experiment, the researchers used many compounds, for example, (S)-Benzyl 2-(2,5-dioxooxazolidin-4-yl)acetate (cas: 13590-42-6Safety of (S)-Benzyl 2-(2,5-dioxooxazolidin-4-yl)acetate).

(S)-Benzyl 2-(2,5-dioxooxazolidin-4-yl)acetate (cas: 13590-42-6) belongs to oxazolidine derivatives. Oxazolidine-based compounds are well-known chiral auxiliaries and strategic molecular moieties in chemistry since they can effectively mask or mimic amino acid units or amino alcohols. Some reports highlighted again the effectiveness of oxazolidine-based compounds in driving the stereo- or diastereotopic outcome of chemical reactions.Safety of (S)-Benzyl 2-(2,5-dioxooxazolidin-4-yl)acetate

Referemce:
Oxazolidine – Wikipedia,
Oxazolidine | C3H7NO – PubChem

Hybrid block copolymers of polyesters/polycarbonates and polypeptides synthesized via one-pot sequential ring-opening polymerization was written by Gradisar, Spela;Zagar, Ema;Pahovnik, David. And the article was included in Polymer Chemistry in 2018.Formula: C12H11NO5 This article mentions the following:

An efficient approach toward one-pot sequential ring-opening polymerization (ROP) of cyclic esters/carbonates and N-carboxyanhydride (NCA) monomers, differing in reactivity and type of propagating group, is presented. In the first step, a polyester/polycarbonate is synthesized using methanesulfonic acid as a catalyst. After the completion of polymerization NCA is added to the reaction mixture Methanesulfonic acid successfully catalyzes the initiation step of ROP of NCA and simultaneously prevents the chain propagation by protonation of the formed amine groups. After the completion of NCA initiation, the propagation is started by addition of N-ethyldiisopropylamine as a base to prepare the hybrid block copolymers of polyester/polycarbonate and polypeptide in a one-pot manner. In the experiment, the researchers used many compounds, for example, (S)-Benzyl 2-(2,5-dioxooxazolidin-4-yl)acetate (cas: 13590-42-6Formula: C12H11NO5).

(S)-Benzyl 2-(2,5-dioxooxazolidin-4-yl)acetate (cas: 13590-42-6) belongs to oxazolidine derivatives. Oxazolidines are commonly obtained by reaction of strained heterocycles, mainly aziridines. In another report, the incorporation of an additional substituted oxazolidine ring over a range of new biphenylazepinium salt organocatalysts for the asymmetric epoxidation of alkenes improved enantiocontrol over the parent structures.Formula: C12H11NO5

Referemce:
Oxazolidine – Wikipedia,
Oxazolidine | C3H7NO – PubChem

Glycaemic control boosts glucosylated nanocarrier crossing the BBB into the brain was written by Anraku, Y.;Kuwahara, H.;Fukusato, Y.;Mizoguchi, A.;Ishii, T.;Nitta, K.;Matsumoto, Y.;Toh, K.;Miyata, K.;Uchida, S.;Nishina, K.;Osada, K.;Itaka, K.;Nishiyama, N.;Mizusawa, H.;Yamasoba, T.;Yokota, T.;Kataoka, K.. And the article was included in Nature Communications in 2017.Name: (S)-Benzyl 2-(2,5-dioxooxazolidin-4-yl)acetate This article mentions the following:

Recently, nanocarriers that transport bioactive substances to a target site in the body have attracted considerable attention and undergone rapid progression in terms of the state of the art. However, few nanocarriers can enter the brain via a systemic route through the blood-brain barrier (BBB) to efficiently reach neurons. Here we prepare a self-assembled supramol. nanocarrier with a surface featuring properly configured glucose. The BBB crossing and brain accumulation of this nanocarrier are boosted by the rapid glycemic increase after fasting and by the putative phenomenon of the highly expressed glucose transporter-1 (GLUT1) in brain capillary endothelial cells migrating from the luminal to the abluminal plasma membrane. The precisely controlled glucose d. on the surface of the nanocarrier enables the regulation of its distribution within the brain, and thus is successfully optimized to increase the number of nanocarriers accumulating in neurons. In the experiment, the researchers used many compounds, for example, (S)-Benzyl 2-(2,5-dioxooxazolidin-4-yl)acetate (cas: 13590-42-6Name: (S)-Benzyl 2-(2,5-dioxooxazolidin-4-yl)acetate).

(S)-Benzyl 2-(2,5-dioxooxazolidin-4-yl)acetate (cas: 13590-42-6) belongs to oxazolidine derivatives. Oxazolidines that are the precursor to bisoxazolidines are in effect mono-oxazolidines. They are also used as moisture scavengers in polyurethane and other systems. Oxazolidines are well known as key portions of bioactive molecules or precursors of chiral molecules, as well as established chiral auxiliaries.Name: (S)-Benzyl 2-(2,5-dioxooxazolidin-4-yl)acetate

Referemce:
Oxazolidine – Wikipedia,
Oxazolidine | C3H7NO – PubChem