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עמוד בית
Wed, 28.02.24

Search results

May 2016
Dan Meir Livovsky MD, Orit Pappo MD, Galina Skarzhinsky PhD, Asaf Peretz MD AGAF, Elliot Turvall MSc and Zvi Ackerman MD

Background: Recently we observed patients with chronic liver disease (CLD) or chronic reflux symptoms (CRS) who developed gastric polyps (GPs) while undergoing surveillance gastroscopies for the detection of either esophageal varices or Barrett's esophagus, respectively.

Objectives: To identify risk factors for GP growth and estimate the gastric polyp growth rate (GPGR).

Methods: GPGR was defined as the number of days since the first gastroscopy (without polyps) in the surveillance program, until the gastroscopy when a GP was discovered.

Results: Gastric polyp growth rates in CLD and CRS patients were similar. However, hyperplastic gastric polyps (HGPs) were detected more often (87.5% vs. 60.5%, P = 0.051) and at a higher number (2.57 ± 1.33 vs. 1.65 ± 0.93, P = 0.021) in the CLD patients. Subgroup analysis revealed the following findings only in CLD patients with HGPs: (i) a positive correlation between the GPGR and the patient's age; the older the patient, the longer the GPGR (r = 0.7, P = 0.004). (ii) A negative correlation between the patient's age and the Ki-67 proliferation index value; the older the patient, the lower the Ki-67 value (r = -0.64, P = 0.02). No correlation was detected between Ki-67 values of HGPs in CLD patients and the presence of portal hypertension, infection with Helicobacter pylori, or proton pump inhibitor use.

Conclusions: In comparison with CRS patients, CLD patients developed HGPs more often and at a greater number. Young CLD patients may have a tendency to develop HGPs at a faster rate than elderly CLD patients.

Keren Kremer MD, Michal Dekel MD, Avi Gadoth MD, Jacob Giris MD DSc and Jacob N. Ablin MD
January 2015
Maria A. Martínez-Godínez MSc MD1, Maria P. Cruz-Domínguez DSc, Luis J. Jara MD, Aarón Domínguez-López DSc, Rosa A. Jarillo-Luna DSc, Olga Vera-Lastra MD, Daniel H. Montes-Cortes DSc, Rafael Campos-Rodríguez DSc, Dulce M. López-Sánchez MSc, Cesar M. Mejía-Barradas DSc, Enrique E Castelán-Chávez MSc and Angel Miliar-García DSc

Background: The activated NLRP3 inflammasome is associated with the etiology of fibrotic diseases. The role of inflammasomes in SSc is still poorly understood.

Objectives: To determine the expression of NLRP3 (nucleotide-binding domain, leucine-rich-repeat-containing family, pyrin domain-containing 3) in the skin of patients with systemic sclerosis (SSc) and its relationship with pro-inflammatory cytokines and vascular mediators expression.

Methods: Skin biopsies were taken from 42 patients with either limited or diffuse SSc (21 lcSSc and 21 dcSSc), and from 13 healthy individuals. Using real-time polymerase chain reaction (PCR), the relative expression of caspase-1, IL-1β, IL-18, IL-33, TGF-β, ET-1, iNOS and eNOS genes, were measured. The location of NLRP3 and IL-1β were also determined by immunohistochemistry. Clinical characteristics were evaluated.

Results: The mean age of the patients was 49.3 ± 12.9 (lcSSc), 44.6 ±1 3.8 (dcSSc), and 45 ± 14.1 (healthy individuals). Compared to healthy individuals, the skin of both subtypes of SSc showed a significant increase (P < 0.05) in NLRP3, caspase-1, IL-1β, IL-18 and ET-1. Samples of lcSSc also showed a significant increase of eNOS (P < 0.029), iNOS (P < 0.04) and TGF-β (P < 0.05). Dermal fibrosis evaluated by modified Rodnan skin score (MRSS) had significant correlation with NLRP3, IL-1β, IL-18, and ET-1. Immunohistochemical analysis showed stronger staining of NLRP3 and IL-1β cytoplasmic expression in the keratinizing squamous epithelium of skin from SSc patients compared to controls.

Conclusions: This study identified NLRP3 over-expression in skin of patients with SSc. Skin thickness correlates positively with the NLRP3 inflammasome gene expression and with the vascular mediator and pro-fibrotic ET-1, suggesting that NLRP3 inflammasome plays a role in the pathophysiology of skin fibrosis in human SSc.

October 2014
Orit Barrett MD, Ella Abramovich MD, Jacob Dreiher MD MPH, Victor Novack MD PhD and Mahmoud Abu-Shakra MD
October 2013
O. Zavdy, G. Twig, A. Kneller, G. Yaniv, T. Davidson, G. Schiby and H. Amital
August 2012
S. Ben Shimol, L. Dukhan, I. Belmaker, S. Bardenstein, D. Sibirsky, C. Barrett and D. Greenberg

Background: Human brucellosis is common in southern Israel among the semi-nomadic Bedouin, a population that consumes unpasteurized dairy products. Though camel milk ingestion is a known mechanism for brucellosis acquisition, only a few reports of sporadic cases have been published in the medical literature.

Objectives: To describe a local brucellosis outbreak in 15 extended Bedouin family members, following ingestion of infected camel milk.

Methods: Data regarding patient’s clinical manifestations, laboratory findings, treatment and outcome were collected from the hospital and the health fund clinics’ computerized database. Camel’s blood and milk were tested for Brucella serology and culture. Cases were defined by positive Rose Bengal test, symptoms correlating with brucellosis, and consumption of infected camel milk.

Results: Fifteen patients were diagnosed with acute brucellosis from March to June 2011. Sixty percent of cases had serum agglutination test titers of 1:160 or higher and 4/8 (50%) had positive blood culture for Brucella melitensis. Arthralgia and fever were the most consistent clinical manifestations. Blood and milk serology and milk culture taken from the female camel were positive for Brucella melitensis.

Conclusions: The treating physicians must consider the possibility of infected camel milk ingestion as the mode of infection, both in sporadic cases and in outbreaks of brucellosis.

June 2011
O. Chechik, R. inbar, B. Danino, R. Lador, R. Greenberg and S. Avital

Background: The effect of anti-platelet drugs on surgical blood loss and perioperative complications has not been studied in depth and the management of surgical patients taking anti-platelet medications is controversial.

Objective: To assess the effect of anti-platelet therapy on perioperative blood loss in patients undergoing appendectomy either laparoscopically or via open surgery.

Methods: We reviewed the files of all patients > 40 years old who underwent open or laparoscopic appendectomies from 2007 to 2010. Excluded were patients with short hospitalization and no follow-up of hemoglobin level, patients on warfarin treatment and patients who underwent additional procedures. Estimation of blood loss was based on decrease in hemoglobin level from admission to discharge. Risk factors for blood loss, such as anti-platelet therapy, age, gender, surgical approach, surgical time, surgical findings and complications, were analyzed.

Results: The final cohort included 179 patients (mean age 61 ± 14 years, range 40–93) of whom 65 were males. The mean perioperative hemoglobin decrease was 1.59 ± 1.07 mg/dl (range 0–5 mg/dl). Thirty-nine patients received anti-platelet therapy prior to surgery and 140 did not. No significant differences in decrease of hemoglobin level were found between patients receiving anti-platelet therapy and those who were not (1.73 ± 1.21 vs. 1.55 ± 1.02 mg/dl, P = 0.3). In addition, no difference was found between patients on anti-platelet therapy operated laparoscopically and those operated in an open fashion (1.59 ± 1.18 vs. 2.04 ± 1.28 mg/dl, P = 0.29). Five patients required blood transfusions, two of whom were on anti-platelet therapy. Blood loss was significantly greater in patients with a perforated appendicitis and in those with an operative time of more than one hour.

Conclusions: Anti-platelet therapy does not pose a risk for increased blood loss following emergent appendectomy performed either laparoscopically or in an open fashion.

September 2008
J. Lachter, T. Leska-Aharoni, D. Warum and R. Eliakim

Background: The frequency of colorectal cancer screening tests in Israel is poor, and is much lower than in the United States. This low rate has been attributed to health system failures as well as to barriers on the part of both physicians and patients.

Objectives: To further identify particular health system failures, physician and patient-based barriers, and the effectiveness of public lectures in improving the frequency of performance of CRC[1] screening tests.

Methods: Public lectures on colorectal cancer prevention were held. A gastroenterologist presented the lectures, which were followed immediately by a questionnaire and 4 months later by a telephone call.

Results: Of the 80% of attendees who had never undergone any CRC screening test, only 18% reported family physician recommendations for such tests. Eighty-four percent reported willingness to undergo fecal occult blood testing and 52% to undergo colonoscopy; 62% replied that they should undergo some CRC screening test and 90% believed that these tests save lives. Of the women, 47% expressed preference for a female gastroenterologist. Follow-up showed that 34% proceeded to undergo some CRC screening test: 60% chose colonoscopy and 40% FOBT[2].

Conclusions: Public lectures are effective at improving compliance with the CRC screening test. Physicians should recommend these tests to appropriate individuals. Same-gender gastroenterologists should be considered for individuals uneasy about someone from the opposite gender performing the test. Assessing the various health-promotion efforts can direct us in implementing finite resources to greatest effect. Local cancer institutes and societies may be supportive in disseminating screening information in this way.

[1] CRC = colorectal cancer

[2] FOBT = fecal occult blood testing

January 2008
Y. Shoenfeld, G. Zandman-Goddard, L. Stojanovich, M. Cutolo, H. Amital, Y. Levy, M. Abu-Shakra, O. Barzilai, Y. Berkun, M. Blank, J.F. de Carvalho, A. Doria, B. Gilburd, U. Katz, I. Krause, P. Langevitz, H. Orbach, V. Pordeus, M. Ram, E. Toubi and Y. Sherer
V. Pordeus, O. Barzilai, Y. Sherer, R.R. Luiz, M. Blank, N. Bizzaro, D. Villalta, J-M. Anaya and Y. Shoenfeld

Background: Infectious agents are important in the pathogenesis of autoimmune disease since they are a major part of the environmental trigger of autoimmunity. A negative relationship between latitude and infectious disease species richness has been suggested.

Objectives: To examine whether their prevalence differs in two latitudinally different populations.

Methods: The prevalence of infections with Toxoplasma gondii, rubella virus, cytomegalovirus, Epstein-Barr virus and Treponema pallidum was compared between subjects from Italy and Colombia.

Results: We found high titers of antibodies against four of five microorganisms tested, Toxoplasma gondii (50.8%), rubella virus (German measles) (75%), cytomegalovirus (86.3%), Epstein-Barr virus (83.3%) and Treponema pallidum (6.3%) in completely healthy individuals from a tropical country (Colombia) and a European country (Italy). Differences between two groups of volunteers were noted regarding two infectious agents. The prevalence of immunoglobulin G anti-rubella antibodies was significantly higher among Italian subjects (85% vs. 67.9%, P = 0.002), whereas antibodies against CMV[1] were less prevalent among Italian as compared to Colombian subjects (77% vs. 92.9%, P < 0.001).

Conclusions: These differences might also result in a different tendency towards development of autoimmune diseases associated with these infectious agents in different populations.

[1] CMV = cytomegalovirus

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