A novel stress-based intervention reduces cigarette use in non-treatment seeking smokers

Tobacco use is the leading cause of preventable mortality worldwide. Since current smoking cessation aids show only modest efficacy, new interventions are needed. Given the evidence that stress is a potent trigger for smoking, the present randomized clinical trial tested whether stress could augment the effects of a memory updating (retrieval-extinction) intervention. Non-treatment seeking smokers (n = 76) were assigned to one of four conditions composed of either a stressful or non-stressful psychosocial challenge followed by either smoking or neutral cues. Ten minutes after this manipulation, all underwent a 60-minute extinction procedure during which they viewed smoking-related videos and images and manipulated smoking paraphernalia. Compared to participants who were not exposed to the laboratory stressor, the stressor-exposed groups exhibited greater psychophysiological responses during their intervention and greater decreases in cigarette use at two- and six-weeks follow-up independent of smoking cue exposure. Together, these findings suggest that the ability of stress to activate cigarette seeking processes can be exploited to decrease cigarette use. With replication, the stress-based intervention could become a novel strategy for decreasing cigarette use in non-treatment seeking smokers.Clinicaltrials.gov identifier: {"type":"clinical-trial","attrs":{"text":"NCT04843969","term_id":"NCT04843969"}}NCT04843969.Subject terms: Addiction, Human behaviour     

Light and electron microscopic immunocytochemical visualization of 5-HT1B receptors in the rat brain

Specific antipeptide antibodies were used for the immunohistochemical visualization of 5-HT_1B receptors in the rat brain. A dense, specific 5-HT_1B receptor-like immunoreactivity was found in the globus pallidus, the dorsal subiculum and the substantia nigra. At the light microscope level, immunostaining was diffuse within the neuropil but absent from cell bodies. Observations at the electron microscope level in the substantia nigra showed immunoperoxidase staining in fine unmyelinated axons and nerve terminals.     

Cytotoxicity of fumonisin B1: implication of lipid peroxidation and inhibition of protein and DNA syntheses

The effects of fumonisin B₁ (FB₁) from Fusarium moniliforme on lipid peroxidation and protein and DNA syntheses were studied in monkey kidney cells (Vero cells). FB₁ was found to be a potent inducer of malondialdehyde (MDA), one of the secondary products formed during lipid peroxidation. At 0.14 μM (0.1 μg/ml), FB₁ induced 0.496 ± 0.1 nmoles of MDA/mg protein, compared to the control level 0.134 ± 0.01 nmoles of MDA/mg protein (P < 0.005). No inhibition of protein or DNA synthesis was observed at this concentration of FB₁. Inhibition of protein and DNA syntheses was observed at FB₁ concentrations >14 μM (10 μg/ml) with an IC₅₀ of 33 μM for both protein synthesis and DNA synthesis. These results indicate that lipid peroxidation is a very sensitive cellular response to the mycotoxin fumonisin B₁ observed at concentrations lower than that required to inhibit cellular synthesis of macromolecules, protein and DNA. This oxidative damage induced by FB₁ concentrations encountered in naturally contaminated foodstuffs and feed might lead to mutagenicity and genotoxicity. Received: 18 August 1997 / Accepted: 17 November 1997     

Global quality of life in primary caregivers of patients with cancer in palliative phase staying at home

Goal of work Research on global quality of life (GQOL) in primary caregivers (PCGs) of cancer patients is limited. This study measured significant domains of GQOL in PCGs and their association with the patients’ disease trajectory and the PCGs’ background and life situation. This study also explored differences in their GQOL compared to a normative sample from the general population (NORM).Patient and methods In a cross-sectional design, 71 PCGs (aged ≥50 years) of cancer patients in palliative phase rated their GQOL by the Quality of Life Scale (QOLS) and provided information concerning demography, experienced social support, and caring situation. Associations between the QOLS scores and variables of the patients’ medical history were assessed, and comparisons of QOLS scores were made between the PCGs and age- and gender-adjusted NORM.Main results Long duration of the curative phase for patients and holding a job for PCGs were significantly associated with a favorable GQOL in PCGs. The mean total GQOL score did not differ significantly between the PCGs and NORM groups, though subanalyses revealed significantly more favorable mean score of the relational domain in PCGs compared to NORM.Conclusions GQOL in PCGs of cancer patients in palliative phase staying at home was as good as that of the NORM. For PCGs not employed or caring for patients with a short curative phase, getting some recreation could be of importance for improvement of GQOL.     

Keratitis,Ichthyosis, and Deafness (KID) Syndrome in Half Sibs

Abstract: The keratitis, ichthyosis, and deafness (KID) syndrome is a rare congenital disorder of the ectoderm characterized by diffuse hyperkeratotic erythroderma, keratitis with neovascularization of the cornea, and severe neurosensory hearing loss. A familial occurrence of this syndrome has been mentioned in four reports including three of vertical transmission and one of two affected sisters born from consanguineous, unaffected parents. We report for the first time a familial case of KID syndrome in two half siblings born to the same unaffected mother. This new observation allows us to propose various hypotheses about its mode of inheritance.     

Hepatitis C, alpha interferon, anxiety and depression disorders: a prospective study of 71 patients.

This article presents a prospective study of 71 patients infected with chronic viral hepatitis C and treated with interferon alpha during one year. The objective was to assess the incidence and predictive factors of anxiety and depression symptoms during and after the therapy. Each patient received psychiatric assessment before, during and after treatment, with evaluations using Hamilton-anxiety and MADRS scales. Results confirm the great incidence of depression and anxiety not only during interferon alpha therapy but also after treatment is discontinued. Sleep disorders and MADRS ratings of M4 seem to be predictive of the therapy's side effects. Thus, there seem to be easily discernable parameters allowing depression and suicidal behaviour to be anticipated. This paper emphasises their possible occurrence after the treatment and, therefore, the need for routine assessments after treatment is discontinued. Teams comprising both hepatologists and psychiatrists should complete these assessments. This shows the necessity of interdisciplinary collaboration treatment of this kind.     

Gene Transfer of Heme Oxygenase-1 and Carbon Monoxide Delivery Inhibit Chronic Rejection

The hallmark of chronic rejection is the occlusion of the artery lumen by intima hyperplasia as a consequence of leukocyte infiltration and vascular smooth muscle cell (VSMC) migration and proliferation. Heme oxygenase-1 (HO-1) is a tissue protective molecule which degrades heme into carbon monoxide (CO), free iron and biliverdin. We analyzed the effects of HO-1 gene transfer into the vessel wall using an adenoviral vector (AdHO-1) and of CO delivery in a model of chronic allogeneic aorta rejection in rats. Carbon monoxide treatment was achieved by a new pharmacological approach in transplantation using methylene chloride (MC), which releases CO after degradation. AdHO-1-mediated gene transfer into aorta endothelial cells (ECs) or CO delivery resulted in a significant reduction in intimal thickness compared to untreated or noncoding adenovirus-treated controls. Aortas transduced with AdHO-1 or treated with CO showed a reduction in the number of leukocytes as well as in the expression of adhesion molecules, costimulatory molecules and cytokines, with the gene transfer treatment displaying a more pronounced effect than the CO treatment. Conversely, CO inhibited VSMC accumulation in the intima more efficiently than AdHO-1 treatment. Gene transfer of HO-1 and pharmacological manipulation of CO are novel approaches to the analysis and treatment of chronic rejection.     

Preconditioning by Sevoflurane Decreases Biochemical Markers for Myocardial and Renal Dysfunction in Coronary Artery Bypass Graft Surgery: A Double-blinded, Placebo-controlled, Multicenter Study

Background: Preconditioning by volatile anesthetics is a promising therapeutic strategy to render myocardial tissue resistant to perioperative ischemia. It was hypothesized that sevoflurane preconditioning would decrease postoperative release of brain natriuretic peptide, a biochemical marker for myocardial dysfunction. In addition, several variables associated with the protective effects of preconditioning were evaluated.

Methods: Seventy-two patients scheduled for coronary artery bypass graft surgery under cardioplegic arrest were randomly assigned to preconditioning during the first 10 min of complete cardiopulmonary bypass with either placebo (oxygen-air mixture only) or sevoflurane 4 vol% (2 minimum alveolar concentration). No other volatile anesthetics were administered at any time during the study. Treatment was strictly blinded to anesthesiologists, perfusionists, and surgeons. Biochemical markers of myocardial dysfunction and injury (brain natriuretic peptide, creatine kinase-MB activity, and cardiac troponin T), and renal dysfunction (cystatin C) were determined. Results of Holter electrocardiography were recorded perioperatively. Translocation of protein kinase C was assessed by immunohistochemical analysis of atrial samples.

Results: Sevoflurane preconditioning significantly decreased postoperative release of brain natriuretic peptide, a sensitive biochemical marker of myocardial contractile dysfunction. Pronounced protein kinase C [delta] and [epsilon] translocation was observed in sevoflurane-preconditioned myocardium. In addition, postoperative plasma cystatin C concentrations increased significantly less in sevoflurane-preconditioned patients. No differences between groups were found for perioperative ST-segment changes, arrhythmias, or creatine kinase-MB and cardiac troponin T release.