Alla Reitman, MD, Ilana Friedrich, MD, Ami Ben-Amotz, PhD and Yishai Levy, MD
Background: Obesity is among the well-established risk factors for cardiovascular morbidity and mortality. However, the exact mechanisms are not well understood. Low concentrations of vitamins (fat soluble antioxidants and B vitamins) are linked to accelerated atherosclerosis through increased oxidative stress and homocysteine.
Objective: To compare plasma antioxidant vitamins (carotenoids and vitamin E), B vitamins (folic acid and B12) and homocysteine – all linked to increased cardiovascular morbidity – between patients with severe obesity and lean control subjects.
Methods: We investigated plasma carotenoids, vitamin E, folic acid, B12, and homocysteine in 25 obese patients and their age-matched controls (body mass index 38 ± 3 vs. 21 ± 2 kg/m2), respectively), related to BMI and plasma insulin.
Results: Patients with obesity had normal B vitamins and a non-significant decrease in plasma homocysteine as compared to controls (9.4 ± 2.6 vs. 11.4 ± 4.8 mmol/L, P = 0.07). There was a significant decrease in both plasma carotenoids and vitamin E (0.69 ± 0.32 vs. 1.25 ± 0.72 and 24 ± 10 vs. 33 ± 14 mg/ml, respectively; P < 0.01). Both vitamins were inversely related to BMI and plasma insulin, which was significantly increased in patients with obesity (22 ± 21 vs. 6 ± 2 mU/ml, P < 0.01).
Conclusions: Obese patients with BMI above 35 kg/m2 show low plasma antioxidants (carotenoids and vitamin E). This may result in increased oxidative stress and consequently enhanced atherosclerosis in these patients.
Raanan Shamir, MD, Rami Eliakim, MD, Nitza Lahat, PhD, Esther Sobel, MSc and Aaron Lerner, MD, MHA
Background: Celiac disease is common in both children and adults. Small intestinal biopsy is mandatory for establishing a diagnosis. Anti-endomysial antibodies, detected by immunofluorescence, have a sensitivity and specificity close to 100% in the diagnosis of CD. Recently, tissue transglutaminase has been identified as the target autoantigen of antibodies against endomysium, and TTG antibodies are comparable to EMA-IMF in the diagnosis of CD.
Objective: To evaluate a new enzyme-linked immunosorbent assay kit for EMA, compared to EMA-IMF and TTG antibodies in the diagnosis of CD.
Methods: Our study population included all subjects with positive EMA-IMF who underwent intestinal biopsy (n=21). From the same sera, TTG antibodies and EMA-ELISA were determined, and all antibody results were compared to the biopsy findings.
Results: EMA-IMF was able to predict biopsy findings of CD in 19 of 21 cases (90.5%). When patients with biopsy findings compatible with CD and positive EMA-IMF (n=19) were tested for EMA-ELISA and TTG antibodies, 18 of the 19 were positive for both EMA-ELISA and TTG antibodies. A significant correlation was found between EMA-ELISA and TTG antibody titers (r = 0.74, P < 0.001).
Conclusions: Our study demonstrates that EMA-ELISA is comparable to TTG antibodies in the diagnosis of CD, and supports the use of EMA-ELISA as a serologic marker for this disease.
Dean Ad-El, MD, Nardi Casapi, MD, DMD, Eran Regev, MD, DMD, Raphael Zeltser, DMD, Oded Nahlieli, DMD, Arie Shtayer, DMD, Eithan Hochvald, MD, Jean-Yves Sichel, MD, Tomy Shpitzer, MD, Yehuda Ben Asher, MD and Arie Eldad, MD
Background: The most frequent cause of defect in the mandible is tumor-related surgery. Larger defects or anterior arch defects cause severe morbidity due to disturbances in function and aesthetics.
Objectives: To assess the outcome of free tissue transfer for mandible reconstruction.
Methods: Since 1998 we operated on 11 patients with mandible defects using the fibula flap as the reconstruction method. We performed immediate reconstruction in eight patients after ablative surgery, and late reconstruction due to radiation-induced complications in three.
Results: All patients achieved good functional and aesthetic outcome. During the follow-up period two patients died of their malignant disease and one patient died from a non-related cause. Although two patients underwent reoperation in the first 3 months after their primary operation due to fixation failure, there were no other major complications.
Conclusions: According to the literature and our limited experience, the fibula flap is a safe and reliable option for mandible reconstruction.
Fabio Broglio, MD, Emanuela Arvat, MD, Andrea Benso, MD, Cristina Gottero, MD, Flavia Prodam, MD, Riccarda Granata, PhD, Mauro Papotti, MD, Giampiero Muccioli, PhD, Romano Deghenghi, PhD and Ezio Ghigo, MD
Ghrelin, a 28 amino acid acylated peptide predominantly produced by the stomach, displays strong growth hormone-releasing activity mediated by the hypothalamus-pituitary GH secretagogue receptors that were found to be specific for a family of synthetic, orally active GH secretagogues. The discovery of ghrelin brings us to a new understanding of the regulation of GH secretion. However, ghrelin is much more than simply a natural GH secretagogue. It also acts on other central and peripheral receptors and exhibits other actions, including stimulation of lactotroph and corticotroph secretion, orexigenia, influences gastroenteropancreatic functions, and has metabolic, cardiovascular and anti-proliferative effects. Knowledge of the whole spectrum of biologic activities of this new hormone will provide new understanding of some critical aspects of neuroscience, metabolism and internal medicine. In fact, GHS were born more than 20 years ago as synthetic molecules, eliciting the hope that orally active GHS could be used to treat GH deficiency as an alternative to recombinant human GH. However, the dream did not become reality and the usefulness of GHS as an anabolic anti-aging intervention restoring the GH/IGF-I axis in somatopause is still unclear. Instead, we now face the theoretic possibility that GHS analogues acting as agonists or antagonists could become candidate drugs for the treatment of pathophysiologic conditions in internal medicine totally unrelated to disorders of GH secretion.
Gerard Espinosa, MD, Ricard Cervera, MD, PhD, Joan-Carles Reverter, MD, PhD, Dolors Tassies, MD, PhD, Josep Font, MD, PhD and Miguel Ingelmo, MD, PhD
Wendy Chen, MSW, Ruth Balaban, MA, RN, Varda Stanger, PhD, Ra’aya Haruvi, MSW, Shmuel Zur, MD and Arie Augarten, MD
Rafael Beyar, MD and Luis Gruberg, MD
Emanuel Lebenthal, MD and David Branski, MD