Publications by authors named "Hakem A"

Article Synopsis
  • Cutaneous leishmaniasis is a global public health issue, and this study focuses on its effect on patients' quality of life in the Draa-Tafilalet region of Morocco.
  • Researchers gathered data from 87 patients using the Skindex-16 questionnaire, finding that 73.6% reported a moderate impact on their quality of life, with more females affected than males.
  • The presence of facial lesions significantly worsened quality of life, particularly in emotional and functioning aspects, indicating a need for specific management strategies and further research to understand these effects better.
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  • Crimean-Congo hemorrhagic fever (CCHF) is a viral disease transmitted by ticks, and its prevalence in northern Africa, particularly Algeria, is not well understood.
  • A study was conducted on 269 camels in southern Algeria to determine CCHFV antibodies, revealing a high seroprevalence rate of 94.8%.
  • The presence of ticks was identified as a significant risk factor for CCHF exposure in camels, urging further research on CCHFV's impact on humans, animals, and ticks in the region.
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Scorpion envenomation (SE) is a critical and immediate medical emergency. It represents a major public health concern with significant cause of illness and death, particularly in rural regions where scorpions are more prevalent. Of note, administering appropriate first aid to scorpion sting victims is one of the most effective ways to reduce mortality.

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  • Bluetongue (BT) is a viral disease affecting various ruminants across Africa, but data on its prevalence is limited, prompting a systematic review and meta-analysis.
  • The study found a pooled seroprevalence of the bluetongue virus (BTV) to be 45.02%, with higher rates seen in cattle (49.70%) and goats (47.00%), particularly in the southeastern region of Africa.
  • It was noted that female animals showed a significantly higher seroprevalence (53.30%) compared to males (28.10%), highlighting the need for ongoing monitoring and surveillance to prevent the disease's spread.
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PARP inhibitors (PARPi) are efficacious in -null tumors; however, their utility is limited in tumors with functional BRCA1. We hypothesized that pharmacologically reducing BRCA1 protein levels could enhance PARPi effectiveness in wild-type tumors. To identify BRCA1 downregulating agents, we generated reporter cell lines using CRISPR-mediated editing to tag endogenous BRCA1 protein with HiBiT.

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  • DNA double-strand breaks (DSBs) can move to the nuclear envelope for repair, influenced by DNA damage response kinases and specific cytoplasmic microtubules.
  • A new structure, called DSB-capturing nuclear envelope tubules (dsbNETs), forms with the help of various cellular components and plays a role in both DNA repair and survival of cells under stress.
  • dsbNETs are also linked to cancer cell behavior and may be hyper-induced by mutations associated with aging, highlighting their significance in genome organization and stability.
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Ethnopharmacological Relevance: In Senegal, upper and lower respiratory tract infections constitute a real health problem. To manage these disorders, most people rely on the use of local medicinal plants. This is particularly the case for species belonging to the botanical families, Combretaceae, Fabaceae, Myrtaceae and Rubiaceae, which are widely used to treat various respiratory problems such as colds, flu, rhinitis, sinusitis, otitis, angina, bronchitis, bronchiolitis and also pneumonia.

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Unlabelled: Caspases are cysteine-aspartic proteases that were initially discovered to play a role in apoptosis. However, caspase 8, in particular, also has additional nonapoptotic roles, such as in inflammation. Adipocyte cell death and inflammation are hypothesized to be initiating pathogenic factors in type 2 diabetes.

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  • Breast cancer with BRCA1/2 mutations often recurs and resists treatments like PARP inhibitors, leading to a search for new targeted therapies.
  • Researchers found that losing RNF8 can protect against breast tumors in Brca1-mutant mice, while in human cancer cells, RNF8 deficiency increases DNA damage and leads to cancer cell death through R-loop accumulation.
  • The study reveals that RNF8 interacts with XRN2 to resolve R-loops, and its absence disrupts this process, causing genomic instability and highlighting a synthetic lethal relationship between RNF8 and BRCA1.
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Rift Valley fever (RVF) is a mosquito-borne viral zoonosis caused by the Rift Valley fever virus (RVFV). The present work aims to investigate the epidemiological status and identify the risk factors associated with RVFV infection in dromedary camels (Camelus dromedarius) from southern Algeria. A total of 269 sera of apparently healthy camels was collected and tested using a competitive Enzyme-Linked Immunosorbent Assay (ELISA).

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The COVID-19 pandemic, caused by SARS-CoV-2, addressed the lack of specific antiviral drugs against coronaviruses. In this study, bioguided fractionation performed on both ethyl acetate and aqueous sub-extracts of stems led to identifying luteolin as a highly active antiviral molecule against human coronavirus HCoV-229E. The apolar sub-extract (CHCl) containing phenanthrene derivatives did not show antiviral activity against this coronavirus.

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BRCA1 mutations are associated with increased breast and ovarian cancer risk. BRCA1-mutant tumors are high-grade, recurrent, and often become resistant to standard therapies. Herein, we performed a targeted CRISPR-Cas9 screen and identified MEPCE, a methylphosphate capping enzyme, as a synthetic lethal interactor of BRCA1.

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Antimicrobial resistance is a global threat that is spreading more and more in both human and animal niches. This study investigates the antimicrobial resistance and virulence threats of isolates recovered from intestinal and fecal samples of 100 chickens, 60 turkeys, and 30 sparrows. Extended spectrum β-lactamase (ESBL) producing isolates were recovered in 12 of the animals tested, selecting one isolate per positive animal: sparrow (eight isolates, 26.

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  • In the past decade, several phleboviruses carried by sand flies have been found in Mediterranean countries, with some potential health effects still unclear.
  • During a study in northern Algeria from September to October 2020, researchers collected 3,351 sand flies and identified two pools containing phleboviruses related to the Punique virus (PUNV), already noted in Tunisia and Algeria.
  • The dominance of a specific sand fly species was confirmed, marking the first isolation of PUNV in the region and indicating its wider circulation in North Africa, necessitating more research on its public health impact.
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Leishmaniases are among the most neglected vector-borne diseases, infecting humans as well various animal hosts with clinical outcomes varying from cutaneous disorders to visceral and life-threatening disease. In Algeria, canine leishmaniasis (CanL) caused by Leishmania infantum is endemic mainly throughout the northern regions of the country with the Mediterranean climate that favours the occurrence of Larroussius sand flies, the vectors of the parasite. This study conducted in Bougaa and Kherrata, two regions located in north-eastern Algeria and endemic for CanL, focuses on: i) composition of sand fly fauna, ii) screening of Leishmania parasites and iii) the blood sources of engorged females.

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Purpose: The present study aimed to estimate the prevalence and molecular characterization of Cryptosporidium spp. in six different fish species both from marine and freshwater environments.

Methods: During a period of 2 years (2018-2020), a total of 415 fecal samples and 565 intestinal scrapings were collected in seven provinces from the central and eastern Algeria.

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Cutaneous leishmaniasis (CL) is a parasitic infection which poses a real public health problem in various countries, including Algeria. We aimed in this study to investigate the current epidemiological situation of CL in the wilaya of Batna (northeastern Algeria) during 2010-2020 and to discuss some control measures used to combat the disease in the most endemic foci. Data on CL cases and control measures were obtained from the "Direction de la Santé et de la Population (DSP) of Batna" and the "Etablissement Public de la Santé de Proximité (EPSP) of Barika".

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Background: Intestinal parasitic infections are amongst the most common infections worldwide and have been identified as one of the most significant causes of morbidity and mortality among disadvantaged populations. This comparative cross-sectional study was conducted to assess the prevalence of intestinal protozoan infections and to identify the significant risk factors associated with intestinal parasitic infections in Laghouat province, Southern Algeria.

Methods: A comparative cross-sectional study was conducted, involving 623 symptomatic and 1654 asymptomatic subjects.

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  • Giardia intestinalis is a prevalent cause of digestive issues like diarrhea and abdominal pain, particularly noted in a study conducted in Algiers, Algeria, which focused on the prevalence of this parasite among various age groups.
  • The study surveyed over 2,000 individuals, finding an overall parasite infection rate of 28%, with Giardia affecting 17.1% of those infected, notably more common in children than adults.
  • Despite the frequency of Giardia infection, the research indicated that common symptoms like abdominal pain and diarrhea were not significantly correlated with Giardia compared to other intestinal parasites.
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Germline mutations in BRCA1 and BRCA2 (BRCA1/2) genes considerably increase breast and ovarian cancer risk. Given that tumors with these mutations have elevated genomic instability, they exhibit relative vulnerability to certain chemotherapies and targeted treatments based on poly (ADP-ribose) polymerase (PARP) inhibition. However, the molecular mechanisms that influence cancer risk and therapeutic benefit or resistance remain only partially understood.

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  • - The study analyzed unpasteurized cow milk from Djelfa, Algeria, to assess the presence of Staphylococcus aureus and coagulase-negative staphylococci (CNS), finding contamination in 54.9% of samples, with 10 Staph. aureus and 35 CNS isolates identified.
  • - Testing revealed common antibiotic resistance to penicillin, tetracycline, and erythromycin, with three CNS being methicillin-resistant, all carrying the mecA gene.
  • - The presence of mecA-positive Staph. aureus and multidrug-resistant species in the milk indicates a significant health risk, suggesting that unpasteurized milk in Djelfa could spread pathogenic and antibiotic-resistant bacteria.
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Aim: The present study was designed to investigate the prevalence and identification of gastrointestinal parasites in feces samples of dromedary camels () in Algeria based on microscopic examination.

Materials And Methods: A total of 717 fresh fecal samples obtained from 28 farms at Steppe and Northern Sahara regions of Algeria were processed for microscopic examination after concentration by formalin-ether sedimentation and flotation techniques. In addition, microscopic examination of spp.

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  • This study investigated the prevalence and seasonal variation of thermotolerant campylobacteria in broiler chickens in Batna, East Algeria, over a two-year period.
  • Out of 960 samples tested, a significant portion showed contamination, with the highest rate observed in cecal contents, and summer identified as the peak season for these infections.
  • The isolates demonstrated multidrug resistance, particularly to ampicillin and erythromycin, highlighting the urgency for stricter control measures to protect public health.
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Little is known of the prevalence and genetic identity of Giardia duodenalis in sheep in Algeria. The present study aimed at characterizing G. duodenalis in lambs up to 6 months of age in Djelfa, Algeria.

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