Publications by authors named "Lewin S"

Background: Hyperthermic intraoperative intraperitoneal chemotherapy (HIPEC) is used to treat peritoneal surface-spreading malignancies to maximize local drug concentrations while minimizing systemic effects. The pharmacokinetic advantage of HIPEC is defined as the intraperitoneal to intravascular ratio of drug concentrations. We hypothesized that body surface area (BSA) would correlate with the pharmacokinetic advantage of HIPEC.

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Over 480,000 individuals receive free antiretroviral therapy (ART) in India yet data associating ART adherence with HIV viral load for populations exclusively receiving free ART are not available. Additionally estimates of adherence using pharmacy data on ART pick-up are not available for any population in India. After 12-months ART we found self-reported estimates of adherence were not associated with HIV viral load.

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Importance: Although robotically assisted hysterectomy for benign gynecologic conditions has been reported, little is known about the incorporation of the procedure into practice, its complication profile, or its costs compared with other routes of hysterectomy.

Objectives: To analyze the uptake of robotically assisted hysterectomy, to determine the association between use of robotic surgery and rates of abdominal and laparoscopic hysterectomy, and to compare the in-house complications of robotically assisted hysterectomy vs abdominal and laparoscopic procedures.

Design, Setting, And Patients: Cohort study of 264,758 women who underwent hysterectomy for benign gynecologic disorders at 441 hospitals across the United States from 2007 to 2010.

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Objective: Systematic reviews within the Cochrane Effective Practice and Organisation of Care Group (EPOC) can include both randomized and nonrandomized study designs. We explored how many EPOC reviews consider and identify nonrandomized studies, and whether the proportion of nonrandomized studies identified is linked to the review topic.

Study Design And Setting: We recorded the study designs considered in 65 EPOC reviews.

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Article Synopsis
  • The study aimed to compare the effectiveness of various HDAC inhibitors in activating HIV production and T-cell activation in lab settings.
  • Different HDAC inhibitors showed varying levels of HIV-1 stimulation, with panobinostat being the most potent, able to induce virus production even at low concentrations.
  • The findings support further research into panobinostat for treating latent HIV infections, as it demonstrated superior effectiveness over other tested inhibitors.
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Background: Hepatitis C virus (HCV) and/or hepatitis B virus (HBV) coinfection with human immunodeficiency virus (HIV) has a greater risk of mortality than either HCV or HBV infection alone and is frequently associated with hepatitis flares after antiretroviral therapy (ART) initiation.

Methods: We performed a retrospective cohort study of 287 HIV-positive persons coinfected with HBV and/or HCV (70 had HBV coinfection only, 207 had HCV coninfection only, and 10 had HBV and HCV coinfections) who had pre-ART plasma samples evaluated for biomarkers associated with death (within 4 years) and/or hepatitis flare (within 4 months) after ART initiation. A predictive biomarker risk score was calculated.

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Background: Tenofovir (TDF) is effective for treatment of hepatitis B virus (HBV) in human immunodeficiency virus (HIV) infection; however, some individuals have ongoing HBV viremia, the reasons for which are unclear. We determined the patterns and factors associated with detectable HBV DNA in HIV-HBV-coinfected subjects on highly active antiretroviral therapy (HAART).

Methods: One hundred sixty-five HIV-HBV-coinfected individuals from the United States, Australia, and Thailand, the majority of whom were on HAART at study entry, were prospectively followed semiannually for a median of 2.

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Background: Human immunodeficiency virus (HIV)-infected patients on combination active antiretroviral therapy (cART) are at increased risk of age-related complications. We hypothesized that nucleos(t)ide reverse transcriptase inhibitors (NRTI) may contribute to accelerated aging in HIV-infected individuals on cART via inhibition of telomerase activity.

Methods: Telomerase activity and telomere length (TL) were measured by quantitative polymerase chain reaction in vitro in activated peripheral blood mononuclear cells (PBMCs) cultured with NRTI and ex vivo in PBMCs from uninfected patients exposed to NRTI and from HIV-infected patients on NRTI-containing cART.

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Bone marrow stromal cell-2 (BST-2) has major roles in viral tethering and modulation of interferon production. Here we investigate BST-2 as a receptor for the delivery of antigen to dendritic cells (DCs). We show that BST-2 is expressed by a panel of mouse and human DC subsets, particularly under inflammatory conditions.

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Introduction: There is increasing interest in the possibility of eradication of HIV, given the recent case reports. However, it is not clear to what extent brain involvement by HIV poses a challenge to systemic eradication strategies.

Areas Covered: This review will outline the mechanisms of HIV latency, the various eradication strategies presently under consideration followed by a discussion of the issue of the frequency and severity of brain involvement by HIV.

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Background: Communication problems in health care may arise as a result of healthcare providers focusing on diseases and their management, rather than people, their lives and their health problems. Patient-centred approaches to care delivery in the patient encounter are increasingly advocated by consumers and clinicians and incorporated into training for healthcare providers. However, the impact of these interventions directly on clinical encounters and indirectly on patient satisfaction, healthcare behaviour and health status has not been adequately evaluated.

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The lineage relationships and fate of human dendritic cells (DCs) have significance for a number of diseases including HIV where both blood and tissue DCs may be infected. We used gene expression profiling of human monocyte and DC subpopulations sorted directly from blood and skin to define the lineage relationships. We also compared these with monocyte-derived DCs (MDDCs) and MUTZ3 Langerhans cells (LCs) to investigate their relevance as model skin DCs.

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Objective: We examined the use, safety, and economic impact of same-day discharge for women undergoing laparoscopic hysterectomy.

Study Design: We identified women in the Perspective database who underwent laparoscopic hysterectomy from 2000 through 2010. Discharge was classified as same-day, 1 day, and ≥2 days.

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Background: Hypercalcemia has been reported in association with a number of malignancies, but it is an unusual manifestation of ovarian cancer. This finding at presentation (possibly aggravated by oral calcium intake) led to discovery of a clear cell carcinoma of the ovary. The implications and pathophysiology of this association are reviewed.

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Purpose: Although the association between high surgical volume and improved outcomes from procedures is well described, the mechanisms that underlie this association are uncertain. There is growing recognition that high-volume hospitals may not necessarily have lower complication rates but rather may be better at rescuing patients with complications. We examined the role of complications, failure to rescue from complications, and mortality based on hospital volume for ovarian cancer.

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Circulating heat shock protein 60 (Hsp60) and heat shock protein 10 (Hsp10) have been associated with pro- and anti-inflammatory activity, respectively. To determine whether these heat shock proteins might be associated with the immune activation seen in HIV-infected patients, the plasma levels of Hsp60 and Hsp10 were determined in a cohort of 20 HIV-infected patients before and after effective combination anti-retroviral therapy (cART). We show for the first time that circulating Hsp60 levels are elevated in HIV-infected patients, with levels significantly reduced after cART, but still higher than those in HIV-negative individuals.

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Lipoid pneumonia in children follows mineral oil aspiration and may result in acute respiratory failure. Majority of the patients recover without long-term morbidity, though a few may be left with residual damage to the lungs. We report a case of a two-and-a-half-year-old child with persistent lipoid pneumonia following accidental inhalation of machine oil, who was successfully treated with steroids.

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Objective: Cytoreductive surgery is associated with extensive morbidity and may delay chemotherapy. We examined the associations among cytoreduction, perioperative complications, and delay or omission of chemotherapy.

Methods: Women aged 65 years or older with stage III-IV ovarian cancer who were treated with surgery from 1991-2005 and recorded in the Surveillance, Epidemiology, and End Results-Medicare database were examined.

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Objective: Despite the efficacy of vaccines against human papillomavirus (HPV), vaccination rates remain low in many countries. We estimated the acceptability and satisfaction of HPV vaccination in postpartum women.

Methods: Postpartum women aged 18-26 years were offered the quadrivalent HPV vaccine.

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Background: Tuberculosis rates in the world remain high, especially in low- and middle-income countries. International tuberculosis (TB) policy generally recommends the use of directly observed therapy (DOT) to ensure treatment adherence.

Objective: This article examines a change in TB treatment support that occurred in 2005 in South Africa, from DOT to the enhanced TB adherence programme (ETA).

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Article Synopsis
  • The study evaluated the effectiveness of a program (STRETCH) aimed at training nurses to manage antiretroviral therapy (ART) for HIV patients, focusing on outcomes like mortality and viral suppression.
  • A pragmatic, cluster-randomised trial was conducted in South Africa with two patient cohorts: one starting ART and the other continuing ART, comparing results between those receiving the STRETCH intervention and standard care.
  • Findings showed that the STRETCH program had a significant impact on health outcomes, with data collected over a median follow-up period of about 16 to 18 months across the two cohorts.
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Objective: We analyzed the content, quality, and accuracy of information provided on hospital web sites about robotic gynecologic surgery.

Study Design: An analysis of hospitals with more than 200 beds from a selection of states was performed. Hospital web sites were analyzed for the content and quality of data regarding robotic-assisted surgery.

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