Effect of adding albumin to solutions of somatostatin on inhibiting pentagastrin-stimulated acid secretion in dogs

In five conscious dogs with chronic gastric fistulas we studied the effect of somatostatin solutions on pentagastrin-stimulated acid secretion. Somatostatin was dissolved in 0.154 M NaCl alone or in the same amount of saline to which dog albumin had been added to give a 0.5% solution. Somatostatin produced a dose-dependent inhibition of pentagastrin-stimulated gastric secretion. However, the inhibition was significantly less when somatostatin was dissolved in saline as compared to saline plus albumin. This study suggests that albumin should be added to somatostatin solutions to preserve biological activity, and it confirms previous reports indicating that, without albumin, basic peptides have a tendency to stick to infusion systems.     

MicroRNA-532-5p Regulates Pericyte Function by Targeting the Transcription Regulator BACH1 and Angiopoietin-1

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β-catenin and PPAR-γ levels in bone marrow of myeloproliferative neoplasm: an immunohistochemical and ultrastructural study

In accordance with increased proliferation in myeloproliferative neoplasm (MPN), the goal is to evaluate the immunoexpression of: β-catenin, PPAR-γ and Ki67 protein, to compare them with bone marrow ultrastructural characteristics in patients with MPN. Immunoexpression and electron microscopy of bone marrow was analyzed in 30 Ph-negative MPN patients, including per 10 patients with polycythemia vera (PV), essential thrombocythemia (ET) and primary myelofibrosis (PMF). The quantity of β-catenin immunoreactive cells was significantly higher in PV then in ET (p < 0.01) or PMF group of patients (p < 0.01) and also in ET versus PMF group of patients (p < 0.01). Erythroid lineage showed absent β-catenin staining without immunoreactivity in nucleus. In contrast, immunoreactivity for PPAR-γ was localized mostly in megakaryocytes and the highest number of PPAR-γ immunopositive cells was detected in PMF group of patients. In addition, the proliferative Ki67 index was significantly increased in the PMF and PV patients compared to patients with ET. Also, the megakaryocytes showed abnormal maturation in PMF group of patients as determined by ultrastructural analysis. These results indicated that PV dominantly expressed β-catenin and proliferation marker Ki67 in bone marrow, while PMF is linked preferentially to PPAR-γ immunopositive megakaryocytes characterized by abnormal maturation.     

Pilot Project to Ascertain the Utility of Tower of London Test to Assess Outcomes of Neurofeedback in Clients with Asperger's Syndrome

Introduction. Behavioral and cognitive improvements in clients with Asperger's Syndrome (AS), employing continuous performance tests (CPTs), intelligence and academic measures, and electroencephalographic data, have been reported following 40 sessions of neurofeedback (NFB) training combined with coaching in metacognitive strategies. However, measures of executive functions (EFs) in this population have not been commonly employed and NFB is still not commonly used as a treatment for AS. Therefore, this pilot project used Tower of London – Drexel University (ToL^DX), an individually administered test of EFs, in addition to the previously mentioned measures. The goal of the current study was to investigate the utility of ToL^DX as an assessment tool for clients with AS as well as further study the effects of NFB and training in metacognitive strategies on executive functioning in clients with AS.

Method. Nineteen consecutive clients at the ADD Centre, Toronto, Canada (M age = 12 years 0 months) recruited over a 2½-year period all had full clinical assessment, completed age appropriate questionnaires, and were tested pre- and post-40 NFB sessions.

Results. Following the training, clients with AS were able to plan more efficiently, inhibit premature responses, and shift set with greater ease, as well as solve problems more quickly as measured by their ToL^DX scores. On CPTs, clients with AS showed a trend toward less impulsivity. Finally, improvement in their scores on ToL^DX was not affected by age or IQ.

Conclusion. These data are important because they provide an extension of results of previous studies (Reid, 2005), demonstrate the utility of tests of executive functions in a clinical setting with clients with AS, and suggest directions for further controlled research in this area.     

Tripolar Spinal Cord Stimulation for the Treatment of Abdominal Pain Associated With Irritable Bowel Syndrome

Objectives: The objective of this case report is to describe the use of transverse tripolar dorsal column stimulation in a patient with a history of irritable bowel syndrome (IBS) associated with abdominal pain resistant to conservative treatments. Method: We report a 36‐year‐old man who presented to the pain clinic with an eight‐year history of IBS (constipation predominant with occasional diarrheal episodes), with “crampy and sharp” abdominal pain. He also had nonradicular thoracic spine pain due to thoracic scoliosis. Both pains were affecting his ability to function as an attorney. Prior conservative therapy, including psychologic treatment, antidepressants, and opioids, was without any benefits. Results: The use of a spinal cord stimulator (SCS) was discussed with the patient. The procedure was performed after Institutional Review Board approval. A tripolar SCS was implanted at the T8 level using one‐eight contact and two‐four contact percutaneous leads based on paresthesia reproduction of patient's areas of discomfort. This tripolar spinal cord stimulation provided relief of abdominal and thoracic pain, and better management of gastrointestinal symptoms. The patient was followed‐up for one year, and his quality of life also was improved via the IBS‐Severity Scoring System quality of life tool. Conclusions: The use of the tripolar SCS in this patient provided relief of abdominal and thoracic spine pain, regulated bowel habits, and improved the patient's quality of life. We believe that the use of SCS should be considered as a treatment option in patients with IBS when all conservative treatments failed.