Intervention effects of sulfate glycosaminoglycan from swim bladder against arsenic-induced damage in IEC-6 cells.

In this study, a purified macromolecular sulfate glycosaminoglycan whose structural characterization is similar to chondroitin sulfate from the swim bladder of Aristichthys nobilis, named SBSG, was used to explore the intervention effects on arsenic-induced intestinal epithelial cells (IEC-6) damage. Arsenic exposure led to cell membrane rupture, mitochondrial dysfunction, oxidative damage, and down-regulation of tight junction proteins expression. Treatment with SBSG could alleviate arsenic exposure-induced cell damage by decreasing the extracellular lactate dehydrogenase activity and influencing mitochondrial membrane potential, reactive oxygen species level, malondialdehyde content, and anti-oxidative enzyme activity. On the other hand, SBSG could promote nitric oxide production to achieve potential immunoregulation. The Western blot showed that intervention of SBSG mainly could restrain the activation of the JNK signaling pathway and up-regulate the expression of ZO-1 against arsenic-induced cell damage. This study provides a new perspective for understanding the heavy metal detoxification of SBSG on the intestinal and indicates that SBSG could be used as natural antioxidant resistant to heavy metal toxicity.

Regulatory effects of marine polysaccharides on gut microbiota dysbiosis: A review.

The gut microbiota dysbiosis is a state which the physiological combinations of flora are transformed into pathological combinations caused by factors such as diets, pollution, and drugs. Increasing evidence shows that dysbiosis is closely related to many diseases. With the continuous development and utilization of marine resources, marine polysaccharides have been found to regulate dysbiosis in many studies. In this review, we introduce the types of dysbiosis and the degree of it caused by different factors. We highlight the regulating effects of marine polysaccharides on dysbiosis as a potential prebiotic. The mechanisms of marine polysaccharides to regulate dysbiosis including protection of intestinal barrier, regulatory effect on gut microbiota, alteration for related metabolites, and some other possible mechanisms were summarized. And we aim to provide some references for the high-value utilization of marine polysaccharides and new targets for the treatment of gut microbiota dysbiosis by this review.

Mental health in adults with sudden sensorineural hearing loss: an assessment of depressive symptoms and its correlates.

OBJECTIVE: Sudden sensorineural hearing loss (SSNHL) is defined as >30dB of hearing loss in at least three contiguous test frequencies occurring within 3days or less and may be accompanied by tinnitus and vertigo. Despite the well-documented association between hearing loss and depressive symptoms, research on the emotional distress after SSNHL receives only scant attention. DESIGN: The current study sought to (1) investigate the degree of self-reported mental distress in patients with SSNHL after a median follow-up period of 1year, (2) investigate the association between mental distress, hearing recovery, and tinnitus. STUDY SAMPLE: 147 patients admitted for sudden hearing loss and diagnosed with SSNHL. RESULTS: Patients who recovered from SSNHL reported significantly less depressive symptoms. Patients with tinnitus, compared to those without tinnitus, reported more depressive thoughts and feelings, more disruptive activities and personal relationships, and more physical symptoms. CONCLUSIONS: This study showed that SSNHL patients who developed continuous tinnitus had a higher rate of greater emotional distress than those without tinnitus. Further research on the consequences of different risk factors specific to SSNHL, their impact on psychological well-being, and the development of better treatment strategies is needed to lessen the burdens associated with SSNHL.