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9 result(s) for "Ben Hmida, Rania"
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Physico-chemical analysis of virgin olive oils from fresh and fallen fruits for assessing the quality and shelf life: characterization by chemometrics
The current study was conducted on olive fruit from the Chemlali cultivar gathered during two successive crop seasons and divided into two groups: olive plucked off the tree (Fresh olive) (oil yields 23%) and olive obtained from the ground before harvesting time, corresponding to Fallen Olive Fruit (oil yields 30%). The purpose of this research was to determine the effect of olive category on the quality of virgin olive oil (VOO). Analytical indicators, such as free acidity, peroxide value, and UV absorbance at 232–270 nm, showed higher values in Fallen Olive Fruit Oil, while pigments, total phenols, and oxidative stability exhibited lower values compered to Fresh olive oils. Similarly, Fallen Olive Fruit Oil has a lower oleic acid concentration, while the sterol content of the two samples remained nearly consistent across the two crop seasons. Furthermore, the phenolic percentage emanated from Chemlali olive oil varies according to the type of olive fruit, with Fresh olive oil having the highest concentration.
Fatty acid and triacyglycerid as markers of virgin olive oil from mediterranean region: traceability and chemometric authentication
In this study, the effects of cultivar, harvest year and the geographical regions were investigated by determining the sensory and chemical characteristics (Fatty acids, Triacyglycerid and Tocopherols compositions) of the cultivars from different geographical origins (Tunisia, Portugal, France and Turkey) over a 2-year harvest period. Parameters such as palmitic acid, oleic acid, linoleic acid and oxidative stability were found to be significantly affected according to the region and cultivar. The highest linoleic and lowest oleic acid content were detected in Tunisia. The amount of palmitic acid was found to be higher in some cultivar (Tunisia and Turkey) than in others (Portugal and France). Nevertheless, principal component analysis allowed us to highlight the Tunisian olive oils for its interesting oxidative stability.
Prevalence and predicting factors of increased arterial stiffness in autosomal dominant polycystic kidney disease
Carotid-femoral pulse wave velocity (cf-PWV) is the noninvasive gold standard technique for measuring aortic stiffness. Autosomal dominant polycystic kidney disease (ADPKD) is the most common genetic renal disease in adults. It is associated with a high risk of cardiovascular complications. We aimed to assess the prevalence of increased arterial stiffness and its predicting factors in a population of ADPKD patients. Sixty-two patients with ADPKD underwent noninvasive measurement of cf-PWV using a COMPLIOR Analyse device. Recruitment period was 17 months and we used the cut-off of 10 m/s to define a high cf-PWV. Mean age was 51 ± 12.7 years. Gender ratio male/female was 0.63. Smoking, hypertension (HTN), and dyslipidemia were reported in 14%, 66%, and 27% of the cases, respectively. Mean glomerular filtration rate (GFR) was 47.7 ± 44 mL/min/1.73 m2. Among our patients, 39% had chronic kidney disease stages 1 or 2 and 45% stage 5 (40% stage 5D). Mean cf-PWV was 9 ± 2.4 m/s, and 31% of the patients had a high cf-PWV. In univariate analysis of all our patients, cf- PWV correlated with age (r = 0.565; P <10-3), GFR (r = -0.268;P = 0.035), C-reactive protein (r = 0.447; P = 0.007), peripheral systolic arterial pressure (r = 0.309; P = 0.015), and peripheral pulse pressure (r = 0.335; P = 0.008). Patients with high cf-PWV were on average nine years older than the others. Patients with HTN were 3.84 times more likely to have high cf-PWV (P = 0.046). cf-PWV did not seem to be lower with any antihypertensive treatment. A level of C-reactive protein higher than 10 mg/L was the only independent predicting factor of a high cf-PWV in multivariate analysis (P = 0.043). Our study confirmed the relationship between cf-PWV and age, renal failure, and HTN in patients with ADPKD. It also emphasized the close relationship between systemic inflammation and arterial stiffness in this nephropathy.
Comparison of changes in pulse wave velocity in patients on peritoneal dialysis and hemodialysis
Cardiovascular disease is the leading cause of death of dialyzed patients. Aortic stiffness, evaluated by the carotid-femoral pulse wave velocity (cfPWV), is now considered as a prognostic factor for cardiovascular mortality in patients with chronic kidney diseases. The peritoneal dialysis (PD) patients had significantly stiffer arteries. cfPWV was 9.12 ± 2.7 m/s in PD patients without significant correlation compared to hemodialysis (HD) patients (8.97 ± 2.52 m/s). In the univariate study, we found a statistically significant correlation between PWV and age (P = 0), between the pulse wave velocity and phosphorus (P = 0.46), between the VOP and PTH (P = 0.013) and between PWV and dyslipidemia (P = 0.014). Other variables such as phospho-calcic product, hemoglobin, total cholesterol, and KT/V were not significant. To identify the risk factors independently linked to the event, we conducted a multi-varied analysis. A correlation was found between VOP and dyslipidemia (P = 0.008). The other variables were insignificant.
Pellagra Disease in a Hemodialysis Patient
Pellagra usually results from niacin deficiency and presents with the classic triad of dermatitis, diarrhea, and dementia. It is most commonly associated with malnutrition and poverty. We report a case of pellagra in a hemodialysis (HD) patient with breast neoplasia, aged 68-years, female, on HD unit for seven years. Her original nephropathy was indeterminate. The patient was followed up for homozygous beta-thalassemia and breast neoplasia with hepatic metastases on chemotherapy. The body mass index of the patient was 18.5 kg/m2. Physical examination showed a thickening of the epidermis with a scaly surface, pigmented, and atrophied areas. We noted neuropsychiatric signs (apathy, irritability, anorexia, and depression) and digestive symptomatology (diarrhea). The laboratory tests revealed hypoproteinemia at 55 g/L, hypoalbuminemia at 21 g/L, and hypocholesterolemia at 0.8 g/L. The diagnosis of pellagra disease was made. Vitamin and protein supplementation was initiated, but the patient committed suicide by puncture of her arteriovenous fistula, causing hemorrhagic shock. Pellagra is usually reported to be associated with malnutrition, chronic alcoholism, and some chemotherapeutic agents. In our patient, pellagra was caused by malnutrition and co-morbidities. Pellagra disease requires multidisciplinary care and can be frequently seen in HD patients due to the associated malnutrition.
Epstein Syndrome
Epstein syndrome is characterized by sensorineural hearing impairment, macro- thrombocytopenia without neutrophil inclusion bodies, and hereditary nephritis which can progress to end-stage renal disease (ESRD) in adolescence. The prognosis of Epstein's syndrome depends on the severity of the hematological disorders and renal involvement that can lead to ESRD at an early age. Thrombocytopenia in Epstein syndrome is not an absolute contraindication for major surgical procedures like arteriovenous fistula formation or kidney transplantation. There are no set guidelines for preoperative prophylaxis in a patient with this pathology.
Phenotypic variability and management of patients with mosaic monosomy X and Y chromosome material: a case series
Background we aim to discuss the origin and the differences of the phenotypic features and the management care of rare form of disorder of sex development due to Mosaic monosomy X and Y chromosome materiel. Methods We report our experience with patients harboring mosaic monosomy X and Y chromosome material diagnosed by blood cells karyotypes and cared for in our department from 2005 to 2022. Results We have included five infants in our study. The current average age was 8 years. In four cases, the diagnosis was still after born and it was at the age of 15 years in one case. Physical examination revealed a variable degree of virilization, ranging from a normal male phallus with unilateral ectopic gonad to ambiguous with a genital tubercle and bilateral not palpable gonads in four cases and normal female external genitalia in patient 5. Karyotype found 45, X/46, XY mosaicism in patient 1 and 2 and 45, X/46, X, der (Y) mosaicism in patient 3, 4 and 5. Three cases were assigned to male gender and two cases were assigned to female. After radiologic and histologic exploration, four patients had been explored by laparoscopy to perform gonadectomy in two cases and Mullerian derivative resection in the other. Urethroplasty was done in two cases of posterior hypospadias. Gender identity was concordant with the sex of assignment at birth in only 3 cases. Conclusion Because of the phenotypic heterogeneity of this sexual disorders and the variability of its management care, then the decision should rely on a multidisciplinary team approach.
The diagnosis of tuberculosis in dialysis patients
The incidence of tuberculosis (TB) is high in patients undergoing chronic dialysis than it is in the general population. The diagnosis of TB is often difficult and extrapulmonary involvement is predominant. This study investigates the spectrum of clinical presentations and outcome in dialysis patients during a nine-year period. TB was diagnosed in 41 patients. Anti-TB drugs, adverse effects of therapy, and outcome were noted. Thirty-eight patients (92.6%) were on hemodialysis and three were on peritoneal dialysis (7.3%). The mean age at diagnosis was 50.8 years and the male/female ratio was 1.16. Four patients had a history of pulmonary TB. Extrapulmonary involvement was observed in 32 (78 %) patients. The bacteriological confirmation was made in 41.46% and histological confirmation was made in 26.83%, and in the rest, the diagnosis was retained on the criterion presumption. Nineteen patients (46.34%) developed adverse effects of antitubercular drugs. Eight patients (19.51%) died during the study from TB or adverse effects of treatment. Low urea reduction ratio and female sex were associated with poor prognosis in our study. The clinical manifestations of TB in patients on dialysis are quite nonspecific, making timely diagnosis difficult, and delaying the initiation of curative treatment, which is a major determinant of the outcome
Malignant hypertension-associated thrombotic microangiopathy following cocaine use
Cocaine is one of the most commonly used illicit drugs with distribution and consumption throughout the world. Acute renal failure associated with rhabdomyolysis, direct vasoconstriction and hemodynamic alteration is well described in patients with cocaine intoxication. Cocaine use is associated with high blood pressure and may rarely induce malignant hypertension associated with thrombotic microangiopathy. We report the case of a patient who developed malignant hypertension associated with thrombotic microangiopathy after chronic consumption of cocaine. A kidney biopsy revealed thrombotic microangiopathy with fibrinoid necrosis of arterioles and glomerular tufts. He required dialysis sessions. Cocaine-mediated endothelial injury and platelet activation may play important pathogenetic roles in cocaine abusers who develop malignant hypertension associated with thrombotic microangiopathy. Clinicians need to be aware of this rare feature of cocaine intoxication.