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Background and Objectives Smoking is the primary cause of preventable death and is highly prevalent among patients on methadone assisted treatment (MAT). This study aims to assess the prevalence of tobacco use disorder (TUD) among patients on MAT, the factors associated with TUD, and to examine the association between TUD and quality of life.Methods A total of 171 male patients receiving MAT in two Malaysian government hospitals were assessed for TUD, levels of nicotine dependence, relevant associated factors and quality of life using DSM-5 criteria, Fagerström Test for Nicotine Dependence (FTND), Opiate Treatment Index (OTI), Mini-International Neuropsychiatric Interview (M.I.N.I.) and World Health Organization Quality of Life (WHOQOL)-BREF.Results The prevalence of TUD was 81.3%. Being employed was significantly associated with having a TUD. Among the patients with TUD, the mean FTND score was 3.8 (SD ± 2.0). Being younger, having poorer social function, and presence of current opioid dependence were significantly correlated with higher FTND scores. There was no significant difference in the quality of life between patients with and without TUD. Following multiple linear regression analysis, being unmarried and poor health status were the two factors that significantly predicted a lower quality of life in all four domains of WHOQOL-BREF.Conclusions Given the high prevalence of TUD among methadone-assisted patients, smoking cessation treatment should be integrated into the MAT program in Malaysia. Also, addressing patients' marital and health issues during MAT can be instrumental in improving their quality of life.Borderline personality disorder (BPD) symptoms and suicidal behaviors are prevalent among undergraduate students. Although rumination contributes to self-destructive behaviors in BPD, less research examines the role of rumination in distinct suicidal outcomes among individuals with BPD features instead focusing more on self-destructive behaviors as a latent variable. The present study examined the main and interactive effects of BPD features and two forms of rumination (brooding and anger) in the prediction of suicide-related outcomes (ideation and attempts) among college students. Participants (N = 181 undergraduate students, overrecruited for BPD features; 55.2% female) reported their lifetime suicide risk, brooding rumination, anger rumination, and BPD features. Brooding rumination and BPD features were associated with suicidal ideation. Anger rumination was not associated with suicide-related outcomes. Findings suggest that brooding rumination is a potential intervention target for suicidal ideation in undergraduate students whereas further research is required to determine the association between anger rumination and suicidal ideation and attempts.The potassium channel Kv1.3 is an important pharmacological target and the Kaliotoxin-type toxins (α-KTX-3 family) are its specific blockers. Here, we study the binding process of two kinds of Kaliotoxin-type toxinsBmKTX and its mutant (BmKTX-D33H) toward to Kv1.3 channel using MD simulation and umbrella sampling simulation, respectively. The calculated binding free energies are -27 kcal/mol and -34 kcal/mol for BmKTX and BmKTX-D33H, respectively, which are consistent with experimental results. The further analysis indicate that the characteristic of electrostatic potential of the α-KTX-3 have important effect on their binding modes with Kv1.3 channel; the residue 33 in BmKTX or BmKTX-D33H plays a key role in determine their binding orientations toward to Kv1.3 channel; when residue 33 (or 34) has negative electrostatic potential, the anti-parallel β-sheet domain of α-KTX-3 toxin peptide will keep away from the filter region of Kv1.3 channel, as BmKTX; when residue 33(or 34) has positive electrostatic potential, the anti-parallel β-sheet domain of α-KTX-3 toxin peptide will interact with the filter region of Kv1.3 channel, as BmKTX-D33H. Above all, electrostatic potential differences on toxin surfaces and correlations motions within the toxins will determine the toxin-potassium channel interaction model. In addition, the hydrogen bond interaction is the pivotal factor for the Kv1.3-Kaliotoxin association. Understanding the binding mechanism of toxin-potassium channel will facilitate the rational development of new toxin analogue.A new series of bio active Cu(II) and Zn(II) complexes [CuL(phen)](OOCCH3) (1), [ZnL(phen)](OOCCH3) (2), [CuL(bpy)](OOCCH3) (3), [ZnL(bpy)](OOCCH3) (4) have been synthesized using the pyrimidine derivative Schiff base (HL) [HL = 2-(4,6-dimethylpyrimidin-2-ylimino)methyl)-4-nitrophenol], 1,10-phenanthroline (phen), 2,2'-bipyridine (bpy) and acetate salts of Cu(II) and Zn(II). UV-Visible, FT-IR, 1H-NMR, ESR, elemental analysis, molar conductance and EI-MS spectral techniques have been used to endorse the square planar geometry for the complexes 1-4. The optimized molecular structure and the harmonic vibrational frequencies have been scrutinized by DFT methods. The antibacterial and antifungal activity of Schiff base (HL) and complexes 1-4 indicates that complex 1 acts as good antimicrobial agent against microbial strains than HL, complexes 2-4 and standard drugs streptomycin and nystatin. https://www.selleckchem.com/products/ly333531.html DNA cleavage study of the complexes 1-4 exposes that complexes 1 and 3 spectacle good cleaving agent than complexes 2 and 4. The interaction of complexes 1-4 with CT DNA using absorption, emission and viscometric measurements signifies that complexes 1-4 bind via an intercalation mode. The highest binding constants (Kb) for the complex 1 is confirmed as 7.83 × 103 M-1 and 2.98 × 104 M-1 by absorption and emission spectrum respectively. These experimental observations were found to be close to the theoretical observations investigated by the molecular docking technique. Antioxidant property of the complexes 1-4 using DPPH assay clinches that complex 1 produces significant scavenging effect than other compounds. The result of in vitro cytotoxicity of the Schiff base (HL) and complexes 1-4 shows that complex 1 shows better ability to inhibit the growth of cancer cells.Communicated by Ramaswamy H. Sarma.
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