Publications by authors named "Tewfik Sahraoui"

Breast cancer (BC) is the most frequently diagnosed cancer among women worldwide, including Algeria. Certain single nucleotide polymorphisms (SNPs) have been linked to higher risk of BC. Several studies have been performed on the insulin- like growth factor 1 (IGF-1) T > C (rs7136446) and the interleukin 6 (IL-6) 174 G > C (rs1800795) SNPs to explore their role in BC.

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Background: Breast phyllodes tumors (BPT) have variable malignant potential, their histological classification remains insufficient for an accurate diagnosis.

Objectives: We attempted to investigate CD10 (Cluster of differentiation 10) and EGFR (Epidermal growth factor receptor) expression in BPT in order to highlight their diagnostic and prognostic values.

Methods: Eight patients with BPT are recruited from January 2014 to December 2020 and immunohistochemical assessment of CD10 and EGFR is realized.

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Background: Acute leukemia (AL) constitutes a group of malignant hematological diseases with multifactor origins. Some human leukocyte alleles (HLA) may be important genetic risk factors for development of acute myeloid leukemia (AML) and acute lymphoblastic leukemia (ALL). It is still unknown whether there is a relationship between ALL and AML with some alleles of the major histocompatibility complex.

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Nasopharyngeal cancer (NPC) is a prevalent type of cancer that often takes the form of undifferentiated carcinoma in the Maghreb region. It affects people of all ages. NPC diagnosis, mainly based on detecting Epstein-Barr virus (EBV), has not been well evaluated in North Africa.

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Infertility is a major public health problem that Assisted reproductive technology (ART) helps remedying, allowing infertile couples realizing their parental project. In Algeria, the infertility rate is about 15%. Thereupon, several ART national centers have emerged.

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Introduction: Breast cancer (BC) is the most common malignancy in women worldwide, representing a major public health burden. Therefore, there is a need to identify circulating biomarkers for the early detection of BC and to facilitate the diagnosis. Interleukin-6 (IL-6), 4-hydroxy-2-nonenal (4-HNE), and hypoxia-inducible factor 1-α (HIF-1α) are biomarkers involved in the initiation and progression of this disease.

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Objective: A microbial fuel cell (MFC) has been conceived and constructed for the treatment of the sheep manure wastes and their conversion into clean sustainable renewable energy. The aim of the present investigation was to examine the performance of this bioelectrochemical device, in breaking down the organic matter (pollutant removal) and simultaneously producing electricity. Furthermore, the objective was to enhance the low electric energy by using an adequate amplification system.

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Introduction: breast cancer is related to age. The young age remains a controversial issue as a prognostic factor and have more aggressive clinical behavior with poor outcome. We aimed for the first time in Algeria to explore on a large cohort of patients the prevalence of the molecular phenotypes and to describe their clinical characteristics and survival.

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Context: Breast cancer is the most common cause of cancer mortality among women worldwide. It is a heterogeneous disease partly responsible for treatment failure in luminal B patients. Deregulation of fibroblast growth factor signaling has been found and its therapeutic/prognostic value is explored.

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Introduction: Luminal B breast cancer is associated with a poor prognosis and resistance to hormone therapy. Studies have suggested that Ras-related protein 25 (RAB25), a member of Rab small GTPase family, is involved in breast cancer pathogenesis. Our aim in the present study is to analyze the association between RAB25 protein expression and clinical and pathological characteristics, and to investigate whether the expression of RAB25 was associated with a specific molecular subtype of breast cancer.

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Objective: An electro-active biofilm of Fruit Peeling (FP) leachate was formed onto the Carbon Felt (CF) bio-anode in a Microbial Fuel Cell (MFC), after functioning for a long time. The electro active-biofilm thus formed was then scratched by ultrasound and re-inoculated in a new leachate to be transplanted onto the bio-anode. This procedure allowed the microbial electron charge transfer and therefore the enhancement of the bio-energy production of the fuel cell.

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Biology flourished during the XXth century and was profoundly disrupted during the last decade because of the transition to the post-genomic era, the spread of high-throughput biology, and the advent of a relatively new discipline, namely bioinformatics. This latter, which encompasses the collection, organization and analysis of biological data using the computer tool, has quickly become inseparable from the studies related to the genome understanding. The consequences of the different mutations that may affect our genes are responsible for a change in the protein sequence and are likely to affect, for example, the stability of the protein, its intracellular targeting, its maturation, its assembly in a multimeric structure, the essential sites for its enzymatic activity or for the interaction with ligands.

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Breast cancer is the common malignancy that affects women worldwide, but conventional risk factors account for only a small proportion of these cases. A possible viral etiology for breast cancer has been proposed and Epstein-Barr virus (EBV) is a widely studied candidate virus. The objective of this study is to determine the association of EBV infection with infiltrating ductal carcinomas (IDC).

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Background: Breast cancer is the most common cancer in women worldwide. Biology contributes to the early diagnosis and monitoring of breast cancer with several categories of markers such as prognostic markers (ER, PR, HER2), proliferative markers (Ki67), and tumor markers such as CEA and CA 15-3. CEA can be detected at a high concentration in serum of patients with malignant tumors.

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Aim: The objective of this study was to evaluate the expression of hypoxia-inducible transcription factor 1α (HIF1α) protein profile among women with breast cancer in a population of western Algerian and to correlate the intensity of this expression with prognosis histological grade Scarff Bloom and Richardson (SBR) of the disease and the age of the patients.

Methods: We used a kit provided by Life Science Inc (UScnk) for a sandwich enzyme immunoassay for the quantitative measurement of in vitro HIF1α in plasma in 44 patients and 44 controls in a population of western Algerian. Then we looked for the correlation between the intensity of the expression of HIF1α and prognosis histological grade SBR and the age of the patients studied.

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Retinoids modulate growth and differentiation of cancer cells through activation of gene transcription via the nuclear retinoic-acid receptors (RAR) and retinoid-X receptors (RXR). Their use in differentiation therapy of acute promyelocytic leukemia (APL) represents a model concept for reprogramming cancer cells. However, they also regulate antiproliferative genes whose functions do not mechanistically concur to this program.

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