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Articles by K Bowman
Total Records ( 2 ) for K Bowman
  M Saberi , D Bjelica , S Schenk , T Imamura , G Bandyopadhyay , P Li , V Jadhar , C Vargeese , W Wang , K Bowman , Y Zhang , B Polisky and J. M. Olefsky

The transcription factor TORC2 [transducer of regulated cAMP-responsive element-binding protein (CREB) activity 2] is a major regulator of hepatic gluconeogenesis and is increased in hyperglycemic rodent models. Because chronic hyperglycemia and increased hepatic glucose production, via increased gluconeogenesis, is a key feature of type 2 diabetes, an effective in vivo method to efficiently knock down TORC2 could provide a potential therapy for treating hyperglycemia and type 2 diabetes. To assess this, primary mouse hepatocytes, high-fat diet (HFD)-fed mice, and Zucker diabetic fatty (ZDF) rats were treated with a siRNA against TORC2 (siTORC2), which was delivered via a novel lipid nanoparticle system, or control siRNA (siCON). Compared with siCON, administration of siTORC2 resulted in highly efficient, sustained (1–3 wk) knockdown of TORC2 and its gluconeogenic target genes phosphoenolpyruvate carboxykinase and glucose-6-phophatase in primary mouse hepatocytes and in the livers of HFD-fed mice. In mice, this knockdown was specific to the liver and did not occur in kidney, skeletal muscle, or adipose tissue. In HFD-fed mice, siTORC2 reduced in vivo gluconeogenic capacity, fasting hepatic glucose production, and hyperglycemia, and led to improved hepatic and skeletal muscle insulin sensitivity. siTORC2 treatment also improved systemic hyperglycemia in ZDF rats. In conclusion, these results demonstrate the importance of TORC2 in modulating HGP in vivo and highlight a novel, liver-specific siRNA approach for the potential treatment of hyperglycemia and type 2 diabetes.

  K Bowman , D. A Telem , J Hernandez Rosa , N Stein , R Williams and C. M. Divino

Objective  To assess for disparity in presentation and management of ventral hernias.

Design  Retrospective review.

Setting  Academic center.

Patients  Three hundred twenty-one patients who underwent ventral hernia repair from 2005 to 2008.

Main Outcome Measures  Disparity in ventral hernia presentation, management, and outcome. Univariate analysis was conducted by unpaired t test and 2 test.

Results  Black individuals were more likely than white individuals to present with acute hernia complications requiring emergent surgery (11% vs 4%; P < .01). This finding persisted after controlling for socioeconomic status (SES). Assessment by SES demonstrated patients with Medicaid were more likely to present with incarcerated or strangulated hernias (39% vs 25%; P < .001) and had longer hospital stays (4.7 vs 3 days; P < .05) as compared with patients with private insurance. Patients classified as low income had increased 30-day readmission rates as compared with average- or high-income patients (32% vs 9% vs 7%, respectively; P < .01). No difference in use of minimally invasive technique, performance of primary vs mesh repair, or postoperative morbidity or mortality was demonstrated. Twelve-month follow-up demonstrated no difference in recurrence rate by race or SES.

Conclusions  Our study demonstrates the existence of disparity in patient presentation with complicated ventral hernia. Despite clear disparity by race and SES, at our institution, disparate presentation did not equate to disparate treatment or postoperative complications. No difference was demonstrated by use of operative technique, perioperative outcome, or 12-month recurrence rate. This study illustrates the need for long-term measures directed at reevaluation of organizational and institutional factors that perpetuate inequality.

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