Publications by authors named "Sameh Abdelnour"

Epidermal growth factor (EGF) plays a crucial role in maintaining male reproductive capacity in mammals, however, its protective effects on cryopreserved dromedary camel epididymal spermatozoa have not been thoroughly investigated. This study aims to investigate the potential protective role of EGF on cryopreserved camel epididymal spermatozoa, supported by evidence from a molecular docking study. We assessed sperm motility, kinematics parameters, oxidative stress, ultrastructural changes, apoptosis, and molecular docking markers in camel epididymal spermatozoa following cryopreservation.

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Alzheimer's disease (AD) is a common neurodegenerative disorder that presents a significant health concern, often leading to substantial cognitive decline among older adults. A prominent feature of AD is progressive dementia, which eventually disrupts daily functioning and the ability to live independently. A major challenge in addressing AD is its prolonged pre-symptomatic phase, which makes early detection difficult.

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This experiment was conducted to determine the most suitable glycerol concentration (3 or 6%) and/or non-penetrating cryoprotectants (trehalose and sucrose) for the cryopreservation of buffalo semen, with the aim of enhancing the cryopreservation protocol. Semen of Egyptian buffalo were pooled and diluted with eight Tris extenders supplemented with either 6% glycerol (control group, GL6), 3% (low level, GL3), sucrose (SU, 50 mM), trehalose (TR, 50 mM), 6% glycerol together with 50 mM of sucrose (GL6SU) or 50 mM of trehalose (GL6TR), and 3% of glycerol together with 50 mM of sucrose (GL3SU) or 50 mM of trehalose (GL3TR), then frozen following the standard protocol. Findings indicated that GL3 extender resulted in the highest values of progressive motility, sperm kinematics, sperm membrane integrity, and viability of post-thawed semen (37 °C for 30 s).

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Climate change has brought significant alterations to the aquatic environment, leading to the rapid spread of infectious fish diseases with increasing water temperatures. It is crucial to understand how aquatic pathogens will impact fish in the context of climate change. This study aimed to assess the effects of climate change on fish diseases globally.

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The use of agricultural waste in animal production has gained global interest. An eight-week trial was conducted to investigate the impacts of adding ethanolic guava leaf extract (GLE) as a feed supplement on the growth, feed utilization, immune response, nutrient digestibility, redox regulation, and blood health of growing rabbits. Ninety weaned growing rabbits were randomly assigned to three groups.

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  • Curcumin, a key compound in turmeric, was studied for its effects on red tilapia broodstock by supplementing their diet with different forms of curcumin (free, blended, or nanoparticles) over 56 days.
  • Results showed that the nanoparticle curcumin (NCur) significantly improved blood health indicators and reproductive hormones, while also reducing liver enzyme levels.
  • Additionally, fish fed NCur showed enhanced reproductive performance and increased expression of important reproductive genes compared to other treatments, highlighting NCur's superiority as a dietary supplement.
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  • - The review highlights the harmful effects of bisphenol A (BPA), an industrial chemical, on reproductive health in both humans and animals, focusing on its role in endocrine disruption and hormonal interference.
  • - It consolidates findings from various laboratory animal studies that show BPA exposure negatively impacts reproductive organ performance and induces cell death in testicular cells.
  • - By discussing the mechanisms of BPA-induced apoptosis, the review aims to deepen understanding of how environmental BPA exposure can adversely affect reproductive tissues.
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The current study evaluates hot water sunflower extracts at 40 °C temperature (AMSE40) for their antibacterial, anti-biofilm, antiviral and anticancer activities. AMSE40 exhibited excellent antioxidant activity with an IC50 of 1.17 mg/mL (ascorbic acid) and was found to be rich in phytochemical compounds such as alkaloids, flavonoids, phenolics, saponins, and tannins, with concentrations of 1.

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Probiotics are becoming increasingly popular as eco-friendly alternatives in aquaculture. However, there is limited research on their impacts on the reproductive efficiency of Red Tilapia (Oreochromis niloticus x O. mossambicus) broodstock.

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  • - Adipose tissue plays a critical role in bodily functions and is made up of various cell types, including adipocytes, which produce bioactive peptides called adipokines, such as Apelin (APLN), Visfatin (VSFTN), and Irisin (IRSN).
  • - These adipokines are crucial for regulating metabolism (energy, carbohydrates, proteins, and lipids) and influence factors like insulin sensitivity and cardiovascular health.
  • - Current research highlights the importance of APLN, VSFTN, and IRSN in farm animals, but more targeted studies are needed to fully understand their roles and improve animal health and productivity.
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  • The study investigated the impact of dietary macadamia oil (MO) on various health and growth metrics in rabbits, using four treatment groups over eight weeks.
  • Results showed that increasing levels of MO improved growth performance and health markers, with an optimal dosage of 1.25 mL/kg for the best outcomes.
  • Key findings included improved immune function and reduced inflammation, indicating that supplementing rabbits’ diets with MO can enhance overall health and growth traits.
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Acetamiprid (ACDP) is a widely used neonicotinoid insecticide that is popular for its efficacy in controlling fleas in domestic settings and for pets. Our study aims to offer a comprehensive examination of the toxicological impacts of ACDP and the prophylactic effects of cinnamon nanoemulsions (CMNEs) on the pathological, immunohistochemical, and hematological analyses induced by taking ACDP twice a ‎week for 28 days. Forty healthy rats were divided into four groups (n = 10) at random; the first group served as control rats; the second received CMNEs (2 mg/Kg body weight); the third group received acetamiprid (ACDP group; 21.

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Sperm cryopreservation can lead to subfertility due to potential damage to sperm DNA, membranes, and overall motility caused by the freeze-thaw process. Interleukin-6 (IL-6) is a versatile cytokine with various roles in reproductive processes. However, the impacts of IL-6 supplementation on cryopreserved ram sperm have not been thoroughly investigated.

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Aflatoxins are toxic compounds produced by certain molds, primarily Aspergillus species, which can contaminate crops such as grains and nuts. These toxins pose a significant health risk to animals and humans. Aflatoxin B1 (AFB1) is the most potent of these compounds and has been well-characterized to lead to diminished growth and feed efficiency by disrupting nutrient absorption and metabolism in poultry.

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  • Cryopreservation can cause oxidative stress that negatively impacts sperm quality, prompting research into quinoa seed extracts (QSE) as a potential solution for enhancing ram sperm.
  • Different concentrations of QSE were added to diluted ram semen before freezing, with higher doses (500-1000 µg/mL) showing significant improvements in sperm viability, motility, and kinematics.
  • QSE supplementation also resulted in increased live sperm with intact acrosomes, reduced apoptosis, and enhanced expression of antioxidant genes while lowering the expression of apoptosis-related genes.
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Epigenetics plays a vital role in the interaction between living organisms and their environment by regulating biological functions and phenotypic plasticity. Considering that most aquaculture activities take place in open or natural habitats that are vulnerable to environmental changes. Promising findings from recent research conducted on various aquaculture species have provided preliminary evidence suggesting a link between epigenetic mechanisms and economically valuable characteristics.

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There is increasing evidence indicating that global temperatures are rising significantly, a phenomenon commonly referred to as 'global warming', which in turn is believed to be causing drastic changes to the global climate. Global warming (GW) directly impacts animal health, reproduction, production, and welfare, presenting several challenges to livestock enterprises. Thermal stress (TS) is one of the key consequences of GW, and all animal species, including livestock, have diverse physiological, epigenetic and genetic mechanisms to respond to TS.

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Sperm cryopreservation technology significantly contributes to the safeguarding of genetic resources, particularly for endangered species, and supports the use of artificial insemination in domestic animals. Therefore, cryopreservation can negatively affect sperm health and function leading to reduce the freezing ability and fertility potential. Therefore, it is essential to prioritize the improvement of cryotolerance in cryopreserved sperm to enhance reproductive efficiency and ensure sustainability in livestock herds.

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Olive oil (OL) production is the most significant agro-industrial business and has a high impact on the economy of numerous Mediterranean countries. However, OL extraction results in massive amounts of byproducts, including a solid residue (olive cake or olive pomace) and an aqueous stage (olive mill wastewater), which have serious environmental effects due to their hazardous nature and excessive organic content. Despite these byproducts causing environmental pollution, they can be applied for animal feeding.

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  • The study explored the effects of clove bud ethanolic extract nano-formulations (CBENF) on sperm characteristics and fertility in cryopreserved rabbit semen.
  • Results showed that a 100 μg/mL concentration of CBENF significantly improved sperm motility, viability, and integrity while reducing abnormalities.
  • Additionally, CBENF supplementation increased antioxidant capacity, reduced oxidative stress markers, and led to higher conception rates and litter sizes in inseminated doe rabbits compared to those without the supplement.
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Heat stress (HS) is still the essential environmental agent influencing the poultry industry. Research on HS in poultry has progressively acquired growing interest because of increased attention to climate alteration. Poultry can survive at certain zone of environmental temperatures, so it could be considered homoeothermic.

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Heat stress (HS) is one of the most significant environmental factors that result in fluctuations and shrinkage in rabbit growth, health, and overall productivity. This study aims to investigate the effects of dietary mineral nanoparticles (selenium or zinc) and/or Spirulina platensis (SP) independently and in combination on stressed growing rabbits. A total of 180 weaned growing New Zealand White rabbits were included in this study and randomly divided into six dietary treatments.

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With the recent trend of global warming, HS-instigated diminishing could extremely jeopardize animal health, productivity, and farm profit. Marjoram essential oil (MEOE) is a worthy source of wide range phytogenic compounds that may improve heat tolerance, redox and inflammatory homeostasis, and immunity of newly weaned rabbits, specifically if included in the diets in a nano form. One hundred newly weaned rabbits were randomly distributed into four homogeneous groups.

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  • Sperm preservation is important in biotech for maintaining male genetic quality, but oxidative stress (OS) during preservation can harm sperm vitality and fertility after thawing.
  • Researchers are exploring the use of antioxidants in semen extenders to combat OS and improve the health and fertility potential of preserved ram sperm.
  • Targeted proteomics techniques are being used to identify and modify proteins in cryopreserved ram sperm, aiming to enhance preservation quality and mitigate the negative impacts of OS.
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Recently, nanotechnology approaches have been employed to enhance the solubility, availability, and efficacy of phytochemicals, overcoming some industrial obstacles and natural biological barriers. In this regard, 120 clinically healthy growing V-line rabbits (5 weeks old) reared during the summer season were divided randomly into four equal experimental groups (30 rabbits each). The first group received a basal diet without the supplementation of the nanoemulsion of cardamom essential oil (NCEO) (0 g/kg diet) and served as a control (NCEO 0).

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