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Abstract Radiotherapy (RT) stands as a frontline treatment modality in clinical breast oncology, yet challenges like ROS reduction, high toxicity, non-selectivity, and hypoxia hinder efficacy. Additionally, RT administered at different doses can induce varying degrees of radioimmunotherapy. High doses of radiation (>10 Gy) may result in immune suppression, while moderate doses (4–10 Gy), although capable of mitigating the immune suppression caused by high-dose radiation, are often insufficient in effectively killing tumor cells. Therefore, enhancing the generation of ROS and ameliorating the tumor hypoxic immune-suppressive microenvironment at moderate radiation doses could potentially drive radiation-induced immune responses, offering a fundamental solution to the limitations of RT. In this study, a novel multifunctional nanoplatform, RMLF, integrating a Ru (II) complex into folate-functionalized liposomes with BSA-MnO2 nanoparticles was proposed. Orthogonal experimental optimization enhances radiosensitization via increasing accumulation in cancer cells, elevating ROS, and contributing to a dual enhancement of the cGAS-STING-dependent type I IFN signaling pathway, aimed to overcome the insufficient DAMPs typically seen in the conventional RT at 4 Gy. Such a strategy effectively activated cytotoxic T lymphocytes for infiltration into tumor tissues and promoted the polarization of tumor-associated macrophages from the M2 to M1 phenotype, substantially bolstering immune memory responses. This pioneering approach represents the first use of a ruthenium complex in radioimmunotherapy, activating the cGAS-STING pathway to amplify immune responses, overcome RT resistance, and extend immunotherapeutic potential.

Abstract Background Acute gouty is caused by the excessive accumulation of Monosodium Urate (MSU) crystals within various parts of the body, which leads to a deterioration of the local microenvironment. This degradation is marked by elevated levels of uric acid (UA), increased reactive oxygen species (ROS) production, hypoxic conditions, an upsurge in pro-inflammatory mediators, and mitochondrial dysfunction. Results In this study, we developed a multifunctional nanoparticle of polydopamine-platinum (PDA@Pt) to combat acute gout by leveraging mild hyperthermia to synergistically enhance UA degradation and anti-inflammatory effect. Herein, PDA acts as a foundational template that facilitates the growth of a Pt shell on the surface of its nanospheres, leading to the formation of the PDA@Pt nanomedicine. Within this therapeutic agent, the Pt nanoparticle catalyzes the decomposition of UA and actively breaks down endogenous hydrogen peroxide (H2O2) to produce O2, which helps to alleviate hypoxic conditions. Concurrently, the PDA component possesses exceptional capacity for ROS scavenging. Most significantly, Both PDA and Pt shell exhibit absorption in the Near-Infrared-II (NIR-II) region, which not only endow PDA@Pt with superior photothermal conversion efficiency for effective photothermal therapy (PTT) but also substantially enhances the nanomedicine’s capacity for UA degradation, O2 production and ROS scavenging enzymatic activities. This photothermally-enhanced approach effectively facilitates the repair of mitochondrial damage and downregulates the NF-κB signaling pathway to inhibit the expression of pro-inflammatory cytokines. Conclusions The multifunctional nanomedicine PDA@Pt exhibits exceptional efficacy in UA reduction and anti-inflammatory effects, presenting a promising potential therapeutic strategy for the management of acute gout. Graphical Abstract

Abstract Since the successful clinical trial of AuroShell for photothermal therapy, there is currently intense interest in developing gold-based core-shell structures with near-infrared (NIR) absorption ranging from NIR-I (650–900 nm) to NIR-II (900–1700 nm). Here, we propose a seed-mediated successive growth approach to produce gold nanoshells on the surface of the nanoscale metal–organic framework (NMOF) of UiO-66-NH2 (UiO = the University of Oslo) in one pot. The key to this strategy is to modulate the proportion of the formaldehyde (reductant) and its regulator / oxidative product of formic acid to harness the particle nucleation and growth rate within the same system. The gold nanoshells propagate through a well-oriented and controllable diffusion growth pattern (points → facets → octahedron), which has not been identified. Most strikingly, the gold nanoshells prepared hereby exhibit an exceedingly broad and strong absorption in NIR-II with a peak beyond 1300 nm and outstanding photothermal conversion efficiency of 74.0%. Owing to such superior performance, these gold nanoshells show promising outcomes in photoacoustic (PA), computed tomography (CT), and photothermal imaging-guided photothermal therapy (PTT) for breast cancer, as demonstrated both in vitro and in vivo.

Developing clinically meaningful nanomedicines for cancer therapy requires the drugs to be effective, safe, simple, cheap, and easy to store. In the present work, we report that a simple cationic Fe(III)-rich salt of [FeIIICl(TMPPH2)][FeIIICl4]2 (Fe-TMPP) exhibits a superior anticancer performance on a broad spectrum of cancer cell lines, including breast, colorectal cancer, liver, pancreatic, prostate, and gastric cancers, with half maximal inhibitory concentration (IC50) values in the range of 0.098–3.97 μM (0.066–2.68 μg mL−1), comparable to the best-reported medicines. Fe-TMPP can form stand-alone nanoparticles in water without the need for extra surface modification or organic-solvent-assisted antisolvent precipitation. Critically, Fe-TMPP is TME-responsive (TME = tumor microenvironment), and can only elicit its function in the TME with overexpressed H2O2, converting H2O2 to the cytotoxic •OH to oxidize the phospholipid of the cancer cell membrane, causing ferroptosis, a programmed cell death process of cancer cells.

Abstract The occurrence of osteoarthritis (OA) is highly correlated with the reduction of joint lubrication performance, in which persistent excessive inflammation and irreversible destruction of cartilage dominate the mechanism. The inadequate response to monotherapy methods, suboptimal efficacy caused by undesirable bioavailability, short retention, and lack of stimulus-responsiveness, are few unresolved issues. Herein, we report a pH-responsive metal-organic framework (MOF), namely, MIL-101-NH2, for the co-delivery of anti-inflammatory drug curcumin (CCM) and small interfering RNA (siRNA) for hypoxia inducible factor (HIF-2α). CCM and siRNA were loaded via encapsulation and surface coordination ability of MIL-101-NH2. Our vitro tests showed that MIL-101-NH2 protected siRNA from nuclease degradation by lysosomal escape. The pH-responsive MIL-101-NH2 gradually collapsed in an acidic OA microenvironment to release the CCM payloads to down-regulate the level of pro-inflammatory cytokines, and to release the siRNA payloads to cleave the target HIF-2α mRNA for gene-silencing therapy, ultimately exhibiting the synergetic therapeutic efficacy by silencing HIF-2α genes accompanied by inhibiting the inflammation response and cartilage degeneration of OA. The hybrid material reported herein exhibited promising potential performance for OA therapy as supported by both in vitro and in vivo studies and may offer an efficacious therapeutic strategy for OA utilizing MOFs as host materials.

Summary: The strategies for eliminating excess reactive oxygen species (ROS) or suppressing inflammatory responses on the wound bed have proven effective for diabetic wound healing. In this work, a zinc-based nanoscale metal-organic framework (NMOF) functions as a carrier to deliver natural product berberine (BR) to form BR@Zn-BTB nanoparticles, which was, in turn, further encapsulated by hydrogel with ROS scavenging ability to yield a composite system of BR@Zn-BTB/Gel (denoted as BZ-Gel). The results show that BZ-Gel exhibited the controlled release of Zn2+ and BR in simulated physiological media to efficiently eliminated ROS and inhibited inflammation and resulted in a promising antibacterial effect. In vivo experiments further proved that BZ-Gel significantly inhibited the inflammatory response and enhanced collagen deposition, as well as to re-epithelialize the skin wound to ultimately promote wound healing in diabetic mice. Our results indicate that the ROS-responsive hydrogel coupled with BR@Zn-BTB synergistically promotes diabetic wound healing.

Abstract A multifunctional nanoplatform with core–shell structure was constructed in one-pot for the synergistic photothermal, photodynamic, and chemotherapy against breast cancer. In the presence of gambogic acid (GA) as the heat-shock protein 90 (HSP90) inhibitor and the gold nanostars (AuNS) as the photothermal reagent, the assembly of Zr4+ with tetrakis (4-carboxyphenyl) porphyrin (TCPP) gave rise to the nanocomposite AuNS@ZrTCPP-GA (AZG), which in turn, further coated with PEGylated liposome (LP) to enhance the stability and biocompatibility, and consequently the antitumor effect of the particle. Upon cellular uptake, the nanoscale metal − organic framework (NMOF) of ZrTCPP in the resulted AuNS@ZrTCPP-GA@LP (AZGL) could be slowly degraded in the weak acidic tumor microenvironment to release AuNS, Zr4+, TCPP, and GA to exert the synergistic treatment of tumors via the combination of AuNS-mediated mild photothermal therapy (PTT) and TCPP-mediated photodynamic therapy (PDT). The introduction of GA serves to reduce the thermal resistance of the cell to re-sensitize PTT and the constructed nanoplatform demonstrated remarkable anti-tumor activity in vitro and in vivo. Our work highlights a facile strategy to prepare a pH-dissociable nanoplatform for the effective synergistic treatment of breast cancer. Graphical Abstract

Abstract Extracellular vesicles (EVs) have found diverse applications in clinical theranostics. However, the current techniques to isolate plasma EVs suffer from burdensome procedures and limited yield. Herein, we report a rapid and efficient EV isolation platform, namely, EV‐FISHER, constructed from the metal‐organic framework featuring cleavable lipid probes (PO43−‐spacer‐DNA‐cholesterol, PSDC). The EV‐FISHER baits EVs from plasma by cholesterol and separates them with an ordinary centrifuge. The captured EVs could be released and collected upon subsequent cleavage of PSDC by deoxyribonuclease I. We conclude that EV‐FISHER dramatically outperforms the ultracentrifugation (UC) in terms of time (∼40 min vs. 240 min), isolation efficiency (74.2% vs. 18.1%), and isolation requirement (12,800 g vs. 135,000 g). In addition to the stable performance in plasma, EV‐FISHER also exhibited excellent compatibility with downstream single‐EV flow cytometry, enabling the identification of glypican‐1 (GPC‐1) EVs for early diagnosis, clinical stages differentiation, and therapeutic efficacy evaluation in breast cancer cohorts. This work portrays an efficient strategy to isolate EVs from complicated biological fluids with promising potential to facilitate EVs‐based theranostics.

The delivery of biocompatible reagents into cancer cells can elicit an anticancer effect by taking advantage of the unique characteristics of the tumor microenvironment (TME). In this work, we report that nanoscale two-dimensional FeII- and CoII-based metal–organic frameworks (NMOFs) of porphyrin ligand meso-tetrakis (6-(hydroxymethyl) pyridin-3-yl) porphyrin (THPP) can catalyze the generation of hydroxyl radicals (•OH) and O2 in the presence of H2O2 that is overexpressed in the TME. Photodynamic therapy consumes the generated O2 to produce a singlet oxygen (1O2). Both •OH and 1O2 are reactive oxygen species (ROS) that inhibit cancer cell proliferation. The FeII- and CoII-based NMOFs were non-toxic in the dark but cytotoxic when irradiated with 660 nm light. This preliminary work points to the potential of porphyrin-based ligands of transition metals as anticancer drugs by synergizing different therapeutic modalities.

In the title compound, C20H13NO, the indene ring is disordered over two sites with an occupancy ratio of 0.557 (2):0.443 (2). Both disordered components of indene are nearly perpendicular to the naphthalene ring system, making dihedral angles of 90.9 (2) and 85.0 (5)°. The five-membered ring of the 1H-pyrrol-2(3H)-one adopts an envelope conformation with the spiro C atom at the flap position. Intermolecular classical N—H...O and weak C—H...O hydrogen bonding is present in the crystal structure.

The title compound, C22H15ClO4, containing three chiral C atoms, is an intermediate in the design of chiral alcohols. In the crystal structure, a chain structure is generated through C—H...O contacts and an intramolecular C—H...O interaction also occurs. The dihedral angle between the benzene ring and the naphthalene system is 16.5°.

A route to construction of two tetranuclear metal string compounds [{[[(Tab).sub.2]Ag][Au[(CN).sub.2]]}.sub.2] and [{[[(Tab).sub.2]Ag][Au[(CN).sub.2]]}.sub.2] from reactions of preformed complexes [[Au[(Tab).sub.2]].sub.2][([PF.sub.6]).sub.2] and [Ag[(Tab).sub.2]]([PF.sub.6])with K[Au[(CN).sub.2]] is demonstrated. These did not show luminescence, because these compounds, when dissolved tend to dissociate into nonemissive monomeric species, in which ionic interactions and aurophilic bonding interactions are not present.

Approaches to assembly of [[[eta.sup.5]-[C.sub.5][Me.sub.5]]W[S.sub.3][Cu.sub.3]]-based supramolecular compounds from pre-formed incomplete cubane-like clusters [P[Ph.sub.4]][[eta.sup.5]-[C.sub.5][Me.sub.5]]W[S.sub.3][Cu[X.sub.3]] (X=CN, Br) is investigated. The successful construction of compounds from the geometry-fixed clusters expands the scope of the rational design and construction of cluster-based supramolecular assemblies.

Hg(OAc)2 reacts with TabHPF6 [TabH=4-(trimethylammonio)benzenethiol] in MeCN/MeOH to form a mononuclear linear complex [Hg(tab)2](PF6)2. By using this complex as precursor, a new family of mercury(II) zwitterionic thiolate complexes, are prepared and characterized by elemental analysis, IR spectra, UV-vis spectra, H NMR and single-crystal X-ray crystallography.

Abstract This study aimed to investigate the clinical characteristics and predictors of increased rapid eye movement (REM) sleep or slow wave sleep (SWS) in patients with obstructive sleep apnea (OSA) following positive airway pressure (PAP) therapy. The study retrospectively analyzed data from patients with OSA who underwent both diagnostic polysomnography (PSG) and pressure titration PSG at the Tangdu Hospital Sleep Medicine Center from 2011–2016. Paired diagnostic PSG and pressure titration studies from 501 patients were included. REM rebound was predicted by a higher oxygen desaturation index, lower REM proportion, higher arousal index, lower mean pulse oxygen saturation (SpO2), higher Epworth sleepiness score and younger age (adjusted R2 = 0.482). The SWS rebound was predicted by a longer total duration of apneas and hypopneas, lower N3 duration, lower SpO2 nadir, lower REM proportion in diagnostic PSG and younger age (adjusted R2 = 0.286). Patients without REM rebound or SWS rebound had a high probability of comorbidities with insomnia and mood complaints. Some parameters (subjective and objective insomnia, excessive daytime sleepiness, age and OSA severity) indicate changes in REM sleep and SWS between diagnostic and titration PSG tests. Treatment of insomnia and mood disorders in patients with OSA may helpful to improve the use PAP.

Four rare-earth metal complexes, [Ln(Ccbp)3(H2O)3]n (Ln = La (1), Ce (2), Pr (3) and Nd (4)) are synthesised from the ligand H2CcbpBr (H2CcbpBr = 4-carboxy-1-(4-carboxybenzyl)pyridinium bromide) and the respective lanthanide metal ions. Complexes 1-4 are isostructural in that every three Ccbp ligands juxtapose two Ln3+ ions in a monodentate coordination mode to form triple-stranded one-dimensional chain structures. Each central Ln3+ atom further associates with three H[sub 2]O molecules, furnishing a monocapped square-antiprism geometry. Agarose gel electrophoresis studies indicate that 1-4 are capable of cleaving DNA in the presence of H[sub 2]O[sub 2], most probably via an oxidative cleavage mechanism. Complexes 1 and 2 exhibited catalytic efficiencies (kmax/KM) of 37.69 and 34.11 h-1 mM-1, and are approx. 15-and 20-fold more effective than those of complexes 3 (kmax/KM= 1.75 h-1 mM-1)and4 (kmax/KM = 221 h-1 mM-1). [ABSTRACT FROM AUTHOR]

We suggest in this paper that the combinative use of bent tritopic carboxylate, linear dipyridyl and adaptable Cu2+ ion leads to a higher probability of self-penetrated polymeric networks. This assertion is supported by four structures isolated herein, among which two are self-penetrated, highlighting the potential for controlled assembly of self-penetrating networks. [ABSTRACT FROM AUTHOR]

A variety of network structures have been prepared by transmetalation of a polymer {Na3[Na9(Cbdcp)6(H2O)18]}n (1) (Cbdcp = N-(4-carboxybenzyl)-(3,5-dicarboxyl)pyridinium) containing dodecahedral Na9 aggregate secondary building units with Cu(II) by modulating the temperature, solvent, and pH. These complexes include a large, zwitterionic hexa-cuprometallocycle [Cu6(Cbdcp)6(H2O)18] (2) formed in H2O at room temperature, two three-dimensional polymers [Cu3(Cbdcp)2(OH)2(H2O)2]n (3) and {[Cu3(Cbdcp)2(OH)2]·2H2O}n (4) isolated from H2O and DMF/H2O at 135 °C, and a mononuclear complex [Cu(HCbdcp)2(H2O)3]·H2O (5) from H2O at 100 °C and pH = 6. All the complexes are robust and water stable. The crystal framework of macrocycle 2 is stable up to 100 °C under vacuum and selectively adsorbs CO2. [ABSTRACT FROM AUTHOR]

Assembly of different [MoOS3Cu3]-based coordination polymers from the same components ([(n-Bu)4N]2[MoOS3Cu3(NCS)3] (1) and 4,4′-bypyridine (4,4′-bipy)) via different synthetic approaches has been investigated. Treatment of 1with 4,4′-bipy (molar ratio = 1:1) in aniline afforded {[{MoOS3Cu3(NCS)(ani)2}2(4,4′-bipy)3]·6(ani)}n(ani = aniline) (2), while solid state reaction of 1with equimolar 4,4′-bipy at ambient temperature followed by extraction with aniline yielded {[(n-Bu)4N]2[{MoOS3Cu3(NCS)2}2(4,4′-bipy)3]·2(ani)}n(3). Diffusion reactions of an aniline solution of 1with an aniline solution of 4,4′-bipy in a straight or zigzag glass tube resulted in the formation of {[MoOS3Cu3(NCS)(4,4′-bipy)2.5]·3(ani)}n(4) and {[(MoOS3Cu3)2(NCS)(μ-NCS)(4,4′-bipy)4.5]·7(ani)}n(5), respectively. Compounds 2−5have been characterized by elemental analysis, IR spectra, and single-crystal X-ray crystallography. Compounds 2consists of a 1D zigzag chain in which the dimeric [{MoOS3Cu3(NCS)(ani)2}2(4,4′-bipy)2] units are linked by single 4,4′-bipy bridges, while 3possesses a one-dimensional spiral chain built of the dimeric [{MoOS3Cu3(NCS)2}2(4,4′-bipy)2] units bridged by 4,4′-bipy ligands. Compound 4contains a three-dimensional (3D) 3-fold interpenetrated network in which each [MoOS3Cu3] core acts as a tetrahedral four-connecting node to interconnect four other equivalent ones via single and double 4,4′-bipy bridges. Compound 5has a unique 3D 2-fold interpenetrated network in which the [MoOS3Cu3] cores work as trigonal-pyramidal four- and tetragonal-pyramidal five-connecting nodes to link other equivalent cores through single thiocyanate bridges and single and double 4,4′-bipy bridges. The results may provide interesting insights into effects of synthetic approaches on the construction of cluster-based coordination polymers. [ABSTRACT FROM AUTHOR]

The reaction of Aul with 2 equiv of TabHPF6 [TabH = 4-(trimethylammonio)benzenethiol] in the presence of excess Et3N in dimethylformamide (DMF)/MeOH afforded a binuclear gold(l) complex [Au(Tab)2]2I2•2H2O (1). Anion exchange of 1 with NH4PF6 in DMF gave rise to the more soluble complex [Au(Tab)2]2(PF6)2 (2). Treatment of 2 with K[Au-(CN)2] produced a tetranuclear gold(l) complex {[(Tab)2Au]IAu(CN)2]}2 (3). Analogous reactions of two known mononuclear complexes [Ag(Tab)2](PF6) (4) and [Hg(Tab)2](PF6)2 (5) with 1 or 2 equiv of K[Au(CN)2] generated one Ag2Au2 complex {[(Tab)2Ag][Au(CN)2]}2 (6) and one Au/Hg complex {[Hg(Tab)2][Au(CN)2]2} (7), respectively. Compounds 1-3, 6, and 7 were fully characterized by elemental analysis, IR spectra, UV-vis spectra, ¹H NMR, and single-crystal X-ray crystallography. 1 and 2 have a similar [Au(Tab)2]22+ dimeric structure in which the two [Au(Tab)2]+ cations are connected via one Au-Au aurophilic interaction. In the structure of 3 or 6, each of the two pairs of [M(Tab)2]+ cation and [Au(CN)2]- anion is held together via ionic interactions to form a {[(Tab)2M][Au-(CN)2}} species (M = Au, 3; Ag, 6). Two such species are further connected by one Au-Au aurophilic bonding interaction to form an uncommon Au4 or Ag2Au2 linear string structure with three ligand-unsupported metal-metal bonds. For 7, the [Hg(Tab)2]2+ dication and the [Au(CN)2]22- dianion are interconnected by the secondary Hg⋯N(CN) interactions to form a 1D chain structure. The thermal and luminescent properties of 1-3, 6, and 7 in solid state were also investigated. [ABSTRACT FROM AUTHOR]

Approaches to the assembly of (η5-C5Me5)WS3Cu3-based supramolecular compounds from two preformed incomplete cubane-like clusters [PPh4][(η5-C5Me5)WS3(CuX)3] (X = CN, 1a; X = Br, 1b) have been investigated. Treatment of 1a with LiBr/1,4-pyrazine (1,4-pyz), pyridine (py), LiCl/py, or 4,4′-bipyridine (4,4′-bipy) and treatment of 1b with 4,4′-bipy gave rise to a new set of W/Cu/S cluster-based compounds, [Li{((η5-C5Me5)WS3Cu3(μ3-Br))2(μ-CN)3}·C6H6]∞. (2), [(η5-C5Me5)WS3Cu3(μ-CN)2(py)]∞. (3), {[PPh4][(η5-C5Me5)WS3Cu3(μ3-Cl)(μ-CN)(CN)]·py}∞. (4), [PPh4]2-[(η5-C5Me5)WS3Cu3(CN)2]2(μ-CN)2(4,4′-bipy) (5), and {[(η5-C5Me5)WS3Cu3Br(μ-Br)(4,4′-bipy)]·Et2O}∞. (6). The structures of 2-6 have been characterized by elemental analysis, IR spectra, and single-crystal X-ray crystallography. Compound 2 displays a 1D ladder-shaped chain structure built of squarelike {[(η5-C5Me5)WS3Cu3(μ3-Br)(μ-CN)]4}∞ (μ-CN)22- anions via two pairs of Cu-μ-CN-Cu bridges. Compound 3 consists of a single 3D diamondlike network in which each (η5-C5Me5)WS3Cu3 unit, serving as a tetrahedral node, interconnects with four other nearby units through Cu-μ-CN-Cu bridges. Compound 4 contains a 1D zigzag chain array made of cubane-like [(η5-C5Me5)WS3-Cu3(μ3-Cl)(μ-CN)(CN)]- anions linked by a couple of Cu-μ-CN-Cu bridges. Compound 5 contains a dimeric structure in which the two incomplete cubane-like [(η5-C5Me5)WS3(CuCN)2(μ-CN)] anions are strongly held together via a pair of Cu-μ-CN-Cu bridges. Compound 6 contains a 2D brick-wall layer structure in which dimers of [(η5-C5-Me5) WS3Cu3Br(4,4′-bipy)]2 are interconnected via four Cu-μ-Br-Cu bridges. The successful construction of (η5-C5Me5)WS3Cu3-based supramolecular compounds 2-6 from the geometry-fixed clusters la and lb may expand the scope of the rational design and construction of cluster-based supramolecular assemblies. [ABSTRACT FROM AUTHOR]

The article describes the crystal structure of the organic compound bis[4-(trimethylammonio)phenyl] disulfide diiodide acetone solvate through synthesis and characterization. Findings show the location of iodide ions and acetone solvent molecules between the dications with symmetry-related quaternary ammonium ions around them. Also reported is the position of the anions near the benzene rings as well as the interactions between the acetone atom O1 and atom C7 of the methyl group. Experiment on the preparation of the compound is presented.

The title compound, (C18H26N2S2)[HgI4], consists of a discrete tetra­iodo­mercurate(II) dianion and a bis­[4-(tri­methyl­ammonio)­phenyl] di­sulfide (Tab-Tab) dication. The geometry about the Hg atom in the dianion is a slightly distorted tetrahedral. The Tab-Tab dications are arranged parallel to each other. Three I atoms of the HgI42− dianion are connected to the adjacent H atoms of the methyl and phenyl groups of the Tab-Tab dications to form a two-dimensional network. [ABSTRACT FROM AUTHOR]

The title compound, C9H13NO3S2, exists as a zwitterion with crystallographic mirror symmetry. The central S atom of the S2O3 group adopts a slightly distorted tetrahedral coordination geometry. The S-S bond length is 2.1137 (7) Å, while the S-O bond lengths are in the range 1.4417 (12)-1.457 (2) Å. The zwitterions in the crystal adopt a head-to-tail arrangement, which leads to the formation of a three-dimensional network through C-H···O hydrogen bonds. [ABSTRACT FROM AUTHOR]

BACKGROUND: The clinical implication of O6-methylguanine-DNA methyltransferase (MGMT) promoter status is ill-defined in elderly glioblastoma patients. Here we report a meta-analysis to seek valid evidence for its clinical relevance in this subpopulation. METHODS: Literature were searched and reviewed in a systematic manner using the PubMed, EMBASE and Cochrane databases. Studies investigating the association between MGMT promoter status and survival data of elderly patients (≥65 years) were eligible for inclusion. RESULTS: Totally 16 studies were identified, with 13 studies included in the final analyses. The aggregate proportion of MGMT promoter methylation in elderly patients was 47% (95% confidence interval [CI]: 42-52%), which was similar to the value for younger patients. The analyses showed differential effects of MGMT status on overall survival (OS) of elderly patients according to assigned treatments: methylated vs. unmethylated: (1) temozolomide (TMZ)-containing therapies: hazard ratio [HR] 0.49, 95% CI 0.41-0.58; (2) TMZ-free therapies: HR 0.97, 95% CI 0.77-1.21. More importantly, a useful predictive value was observed by an interaction analysis: TMZ-containing therapies vs. RT alone: (1) methylated tumors: HR 0.48, 95% CI 0.36-0.65; (2) unmethylated tumors: HR 1.14; 95% CI 0.90-1.44. CONCLUSION: The meta-analysis reports an age-independent presence of MGMT promoter methylation. More importantly, the study encouraged routine testing of MGMT promoter status especially in elderly glioblastoma patients by indicating a direct linkage between biomarker test and individual treatment decision. Future studies are needed to justify the mandatory testing in younger patients.

Many physicians are reluctant to treat elderly glioblastoma (GBM) patients as aggressively as younger patients, which is not evidence based due to the absence of validated data from primary studies. We conducted a meta-analysis to provide valid evidence for the use of the aggressive combination of radiotherapy (RT) and temozolomide (TMZ) in elderly GBM patients.A systematic literature search was conducted using the PubMed, EMBASE and Cochrane databases. Studies comparing combined RT/TMZ with RT alone in elderly patients (≥65 years) with newly diagnosed GBM were eligible for inclusion.No eligible randomized trials were identified. Alternatively, a meta-analysis of nonrandomized studies (NRSs) was performed, with 16 studies eligible for overall survival (OS) analysis and nine for progression-free survival (PFS) analysis. Combined RT/TMZ was shown to reduce the risk of death and progression in elderly GBM patients compared with RT alone (OS hazard ratio [HR] 0.59, 95% confidence interval [CI] 0.48-0.72; PFS: HR 0.58, 95% CI 0.41-0.84). Evaluable patients were reported to tolerate combined treatment but certain toxicities, and especially hematological toxicities, were more frequently observed. Limited data on O6-methylguanine-DNA methyltransferase (MGMT) promoter status and quality of life were reported.The meta-analysis of NRSs provided level 2a evidence (Oxford Centre for Evidence-Based Medicine) that combined RT/TMZ conferred a clear survival benefit on a selection of elderly GBM patients who had a favorable prognosis (e.g., extensive resection, favorable KPS). Toxicities were more frequent but acceptable. Future randomized trials are warranted to justify a definitive conclusion.

Reactions of anhydrous lanthanide(III) trichloride (Ln = Nd, Sm, Eu, Ho, Yb) with one or two equiv. of LiN(SiMe3)2 in THF produced a family of lanthanide(III) bis(trimethylsilyl)amide chloride complexes: [ ((Me3Si)2N)2Nd(mu'-Cl)Li(THF)3 (mu-Cl)]2 (1), [ ((Me3Si)2N)2Ln(mu'-Cl)Li(THF)2 (mu3-Cl)]2 (Ln = Eu (2); Ln = Ho (3)), and [ (Me3Si)2NLn(mu'-Cl)2Li(THF)2 (mu-Cl)]2 (Ln = Nd (4); Ln = Sm (5); Ln = Eu (6); Ln = Ho (7); Ln = Yb (8)). On the other hand, reactions of the monosubstituted silylamido complexes [ (Me3Si)2NLn(mu'-Cl)2Li(THF)2 (mu-Cl)]2 (Ln = Nd (4); Sm (5); Eu (6); Ho (7)) with 2 equiv. of LiN(SiMe3)2 in THF afforded the corresponding disubstituted complexes [ ((Me3Si)2N)2Ln(mu'-Cl)Li(THF)3 (mu-Cl)]2 (Ln = Nd (1); Sm (9)), [ ((Me3Si)2N)2Ln(mu'-Cl)Li(THF)2 (mu3-Cl)]2 (Ln = Sm (9), Eu (2); Ho (3)). These complexes were characterized by melting point determination, elemental analysis and IR spectra. Single-crystal X-ray diffraction studies revealed that these compounds are chloride-bridged dimers, in which Ln metals in 1-3 display a distorted trigonal bipyramidal coordination geometry while those in 5, 6 and 8 a distorted octahedral coordination geometry. Complexes 1-9 exhibited catalytic activity for the ring-opening polymerization of epsilon-caprolactone. [ABSTRACT FROM AUTHOR]