In this study, we performed a novel synthesis of the octahydropyrido[3,2-c]carbazole derivative 6 from 1 in five steps with a 34% overall yield. We also developed a unique compound 2 by a cyclization reaction from the cyanoethylation of compound 1, which is an intermediate step in the synthesis ...

In this study, metallophthalocyanines 4, 5, 6 was carried out by the cyclotetramerization of 4-{3-[(2E)-3-(3,4,5-trimethoxyphenyl)prop-2-enoyl]phenoxy}phthalonitrile 3. The synthesis of metallo derivatives [Zn(II), Co(II), Cu(II)] of phthalocyanines obtained from corresponding phthalonitrile der...

Four new cinnamoyl-phloroglucinols (1–4) were isolated from the leaves of Xanthostemon chrysanthus. Compounds 1 and 2 represent the first example of natural phloroglucinols with an oxazole unit. Their structures were elucidated on the basis of NMR spectroscopic data and single crystal X-ray dif...

Biocompatibility of cinnamoyl-modified carbohydrate materials is not well-known, while they are attracting attention as a photoreactive material. In order to investigate biocompatible properties of cinnamoyl-modified carbohydrate, hydroxypropyl cellulose (HPC) was reacted with cinnamoyl chloride...

The solvatochromic fluorescence behavior of cinnamoyl pyrone derivatives has been studied in several polar and non-polar solvents. The fluorescence spectra of these compounds exhibit red shift from its absorption spectra and present an excellent correlation with solvent polarity. Cinnamoyl pyron...

Publisher SummaryModifications and alternatives to the original HPLC-EC (high-performance liquid chromatography- electrochemical) methods have produced a burgeoning literature on oxidative DNA damage. At the same time, they have resulted in discordant results and disagreements about the most app...

To clarify the relationship of oxidative stress and body iron status, we detected urinary 8-hydroxydeoxyguanosine (8-OHdG) as a biomarker of oxidative DNA damage, and measured serum ferritin and total iron-binding capacity (TIBC), both reflecting body iron store, on 2507 healthy people aged betw...

8-Hydroxydeoxyguanosine (8-OHdG) is one of the most reliable and abundant markers of DNA damage. The study was designed to explore the relationship between urinary 8-OHdG and renal cell carcinoma (RCC) and to investigate whether individuals with a high level of 8-OHdG would have a modified odds ...

8-Hydroxydeoxyguanosine 5′-monophosphate (8-OH dGmp) was synthesized from deoxyguanosine 5′-monophosphate (dGmp) by ascorbic acid in the presence of hydrogen peroxide and labeled with dansyl chloride through a phosphoramidate linkage with ethylenediamine (EDA). A DNA model 8-OHd(TACG), isolate...

Mammalian sperm-borne oocyte activating factor (SOAF) induces oocyte activation from a compartment that engages the oocyte cytoplasm, but it is not known how. A SOAF-containing extract (SE) was solubilized from the submembrane perinuclear matrix, a domain that enters the egg. SE initiated activa...

In many fish species, the spermatozoa are immotile in the testes and seminal plasma, and motility is induced when they are released in the aqueous environment. Extracellular factors control the activation of the axoneme through signal transduction across the plasma membrane. The present review e...

Fourteen new organotin(IV) carboxylate complexes with peptide linkage of (2-(4-methoxy-2-nitrophenylcarbamoyl)benzoic acid) were successfully synthesized and characterized by elemental analyses, FT-IR, NMR (1H, 13C and 119Sn) and single crystal X-ray techniques. FT-IR results of the sodium salt ...

In nematode, sperm activation (or spermiogenesis), a process in which the symmetric and non-motile spermatids transform into polarized and crawling spermatozoa, is critical for sperm cells to acquire fertilizing competence. SPE-8 dependent and SPE-8 independent pathways function redundantly duri...

Successful fertilization requires that sperm are activated prior to contacting an oocyte. In C. elegans, this activation process, called spermiogenesis, transforms round immobile spermatids into motile, fertilization-competent spermatozoa. We describe the phenotypic and genetic characterization ...

Negatively charged side chains are important for the function of particular ion channels and certain other membrane proteins. To investigate the influence of single glutamic acid side chains on helices that span lipid-bilayer membranes, we have employed GWALP23 (acetyl-GGALW5LALALALALALALW19LAGA...

Biocompatible thermosetting hydrogels are attractive compounds either for the delivery of drugs or as medical devices for tissue regeneration purposes. In this work Poly(Gamma-Glutamic Acid) (G-PGA) and G-PGA based hydrogels were explored. The hypothesis was to evaluate G-PGA and crosslinking ag...

Pt(IV) complexes are considered to act as antitumor prodrugs and their in vivo activity can be improved exploiting drug targeting and delivery strategies. With a view to such applications, the maleimide-containing ligand 2-(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)acetic acid was used to produce the...

The anodic oxidation of the oligo-thioether hexakis(benzylthio)benzene in a dichloromethane+NBu4PF6 electrolyte is investigated by several complementary techniques: cyclic voltammetry, ESR spectroscopy, and macroscopic electrolysis (including fractional electrolysis in combination with the deter...

A series of biphenyl carbaldehyde oximes (6) was prepared and shown to have significant selectivity for the estrogen receptor-β (ERβ). The exploitation of the oxime moiety as a hydrogen bond donating group, which mimicked the C-ring of genistein makes these compounds unique. Molecular modeling...

In order to develop novel ligands for the estrogen receptor (ER) that might have high binding affinity and fluorescence properties suitable for assaying ER levels in cells, we have prepared a series of substituted 4′-hydroxyl-styrylpyridines and phenylethylpyridines and studied their optical sp...