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Khalil WA, Hassan MAE, Ibrahim S, Mohammed AK, El-Harairy MA, Abdelnour SA. The beneficial effects of quinoa seed extract supplementation on ram sperm quality following cryopreservation. Anim Reprod Sci 2024; 264:107472. [PMID: 38598888 DOI: 10.1016/j.anireprosci.2024.107472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 03/28/2024] [Accepted: 04/01/2024] [Indexed: 04/12/2024]
Abstract
Although cryopreservation is a reliable method used in assisted reproduction to preserve genetic materials, it can stimulate the occurrence of oxidative stress, which affects sperm structure and function. This research was conducted to explore the effects of quinoa seed extracts (QSE) on ram sperm quality, oxidative biomarkers, and the gene expression of frozen-thawed ram sperm. Semen samples were diluted in extenders supplemented with 0 (QSE0), 250 (QSE1), 500 (QSE2), 750 (QSE3), and 1000 (QSE4) µg of QSE /mL, and then frozen according to the typical procedure. The findings indicate that the QSE3 and QSE4 groups provided the optimal results in terms of sperm viability and progressive motility. Sperm kinematics were considerably enhanced in the QSE3 group compared to the other groups (P<0.01). QSE (500-1000 µg/mL) significantly decreased the apoptosis-like changes (higher viable and lower apoptotic sperm) in ram sperm (P<0.001). The percentage of live sperm with intact acrosomes was significantly increased, while the percentage of detached and intact acrosomes in live and dead sperm were significantly decreased respectively by the QSE addition (P<0.001). All QSE groups had higher TAC and lower MDA and H2O2 levels than the control group (P<0.001). The expressions of SOD1, CAT, GABPB1, and GPX1 genes in sperm samples were significantly increased, while the CASP3 gene was significantly decreased in all QSE-supplemented samples. Our data suggest that QSE has beneficial effects on sperm quality of cryopreserved ram semen, which are achieved by promoting sperm antioxidant-related genes and reducing apoptosis-related gene.
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Affiliation(s)
- Wael A Khalil
- Department of Animal Production, Faculty of Agriculture, Mansoura University, Mansoura 35516, Egypt.
| | - Mahmoud A E Hassan
- Animal Production Research Institute, Agriculture Research Centre, Ministry of Agriculture, Dokki, Giza 12619, Egypt
| | - Sally Ibrahim
- Department of Animal Reproduction and AI, Veterinary Research Institute, National Research Centre, Dokki, 12622, Egypt
| | - Amer K Mohammed
- Department of Animal Production, Faculty of Agriculture, Mansoura University, Mansoura 35516, Egypt
| | - Mostafa A El-Harairy
- Department of Animal Production, Faculty of Agriculture, Mansoura University, Mansoura 35516, Egypt
| | - Sameh A Abdelnour
- Department of Animal Production, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt.
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Ludhiadch A, Yadav P, Singh SK, Sulena, Munshi A. Evaluation of mean platelet volume and platelet count in ischemic stroke and its subtypes: focus on degree of disability and thrombus formation. Int J Neurosci 2024; 134:503-510. [PMID: 36028984 DOI: 10.1080/00207454.2022.2118599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 08/14/2022] [Indexed: 10/15/2022]
Abstract
Background: Platelets are crucial players in thrombus formation during ischemic stroke. Platelet (PLT) count and Mean platelet volume (MPV) are important parameters that affect platelet functions. The current study has been carried out with an aim to evaluate the association of MPV and PLT count with ischemic stroke in a population from the Malwa region of Punjab. Material and Methods: The study included one hundred and fifty ischemic stroke patients. The extent of disability occurs by stroke was measured by mRS. MPV and PLT was evaluated using cell counter. Further, PLT count was confirmed in 50% of patients using flow cytometer. Clot formation rate was evaluated using Sonoclot Coagulation and Platelet Function Analyzer. All the statistical analysis was carried out using SPSS. Results: A significant association of increased MPV (p < 0.02) was found with the ischemic stroke. However, PLT count did not show a significant association with the disease (p < 0.07). Further, a stepwise multiple logistic regression (MLR) analysis controlling the other confounding risk factors evaluated the association of hypertension and MPV with the disease. Patients with higher mRS were found to have high MPV values confirming that higher MPV is correlated with disability occurs by ischemic stroke. MPV was also found to be significantly associated with large artery atherosclerosis (p < 0.001). Clot formation analysis revealed that ischemic stroke patients bear higher clot rate (CR) and Platelet function (PF) values. Conclusions: Elevated MPV is an independent risk factor for Ischemic stroke along with hypertension. In addition, higher MPV associated significantly with stroke disability as well.
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Affiliation(s)
- Abhilash Ludhiadch
- Complex Disease Genomics and Precision Medicine Laboratory, Department of Human Genetics and Molecular Medicine, Central University of Punjab, Ghudda, Bathinda, Punjab, India
| | - Pooja Yadav
- Department of Zoology, Central University of Punjab, Ghudda, Bathinda, Punjab, India
| | - Sunil Kumar Singh
- Department of Zoology, Central University of Punjab, Ghudda, Bathinda, Punjab, India
| | - Sulena
- Department of Neurology, Guru Gobind Singh Medical College and Hospital, Faridkot, Punjab, India
| | - Anjana Munshi
- Complex Disease Genomics and Precision Medicine Laboratory, Department of Human Genetics and Molecular Medicine, Central University of Punjab, Ghudda, Bathinda, Punjab, India
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Chan MV, Chen MH, Thibord F, Nkambule BB, Lachapelle AR, Grech J, Schneider ZE, Wallace de Melendez C, Huffman JE, Hayman MA, Allan HE, Armstrong PC, Warner TD, Johnson AD. Factors that modulate platelet reactivity as measured by 5 assay platforms in 3429 individuals. Res Pract Thromb Haemost 2024; 8:102406. [PMID: 38813256 PMCID: PMC11135030 DOI: 10.1016/j.rpth.2024.102406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Accepted: 04/05/2024] [Indexed: 05/31/2024] Open
Abstract
Background Assessment of platelet function is key in diagnosing bleeding disorders and evaluating antiplatelet drug efficacy. However, there is a prevailing "one-size-fits-all" approach in the interpretation of measures of platelet reactivity, with arbitrary cutoffs often derived from healthy volunteer responses. Objectives Our aim was to compare well-used platelet reactivity assays. Methods Blood and platelet-rich plasma obtained from the Framingham Heart Study (N = 3429) were assayed using a range of agonists in 5 platelet assays: light transmission aggregometry, Optimul aggregometry, Multiplate impedance aggregometry (Roche Diagnostics), Total Thrombus-Formation Analysis System, and flow cytometry. Using linear mixed-effect models, we determined the contribution of preanalytical and technical factors that modulated platelet reactivity traits. Results A strong intra-assay correlation of platelet traits was seen in all assays, particularly Multiplate velocity (r = 0.740; ristocetin vs arachidonic acid). In contrast, only moderate interassay correlations were observed (r = 0.375; adenosine diphosphate Optimul Emax vs light transmission aggregometry large area under the curve). As expected, antiplatelet drugs strongly reduced platelet responses, with aspirin use primarily targeting arachidonic acid-induced aggregation, and explained substantial variance (β = -1.735; P = 4.59 × 10-780; variance proportion = 46.2%) and P2Y12 antagonists blocking adenosine diphosphate responses (β = -1.612; P = 6.75 × 10-27; variance proportion = 2.1%). Notably, female sex and older age were associated with enhanced platelet reactivity. Fasting status and deviations from standard venipuncture practices did not alter platelet reactivity significantly. Finally, the agonist batch, phlebotomist, and assay technician (more so for assays that require additional sample manipulation) had a moderate to large effect on measured platelet reactivity. Conclusion Caution must be exercised when extrapolating findings between assays, and the use of standard ranges must be medication-specific and sex-specific at a minimum. Researchers should also consider preanalytical and technical variables when designing experiments and interpreting platelet reactivity measures.
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Affiliation(s)
- Melissa V. Chan
- Population Sciences Branch, National Heart, Lung, and Blood Institute, Framingham, Massachusetts, USA
| | - Ming-Huei Chen
- Population Sciences Branch, National Heart, Lung, and Blood Institute, Framingham, Massachusetts, USA
| | - Florian Thibord
- Population Sciences Branch, National Heart, Lung, and Blood Institute, Framingham, Massachusetts, USA
| | - Bongani B. Nkambule
- Population Sciences Branch, National Heart, Lung, and Blood Institute, Framingham, Massachusetts, USA
| | - Amber R. Lachapelle
- Population Sciences Branch, National Heart, Lung, and Blood Institute, Framingham, Massachusetts, USA
| | - Joseph Grech
- Population Sciences Branch, National Heart, Lung, and Blood Institute, Framingham, Massachusetts, USA
| | - Zoe E. Schneider
- Population Sciences Branch, National Heart, Lung, and Blood Institute, Framingham, Massachusetts, USA
| | | | - Jennifer E. Huffman
- Population Sciences Branch, National Heart, Lung, and Blood Institute, Framingham, Massachusetts, USA
| | - Melissa A. Hayman
- Centre for Immunobiology, the Blizard Institute, Faculty of Medicine & Dentistry, Queen Mary University of London, London, United Kingdom
| | - Harriet E. Allan
- Centre for Immunobiology, the Blizard Institute, Faculty of Medicine & Dentistry, Queen Mary University of London, London, United Kingdom
| | - Paul C. Armstrong
- Centre for Immunobiology, the Blizard Institute, Faculty of Medicine & Dentistry, Queen Mary University of London, London, United Kingdom
| | - Timothy D. Warner
- Centre for Immunobiology, the Blizard Institute, Faculty of Medicine & Dentistry, Queen Mary University of London, London, United Kingdom
| | - Andrew D. Johnson
- Population Sciences Branch, National Heart, Lung, and Blood Institute, Framingham, Massachusetts, USA
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Igder S, Zamani M, Fakher S, Siri M, Ashktorab H, Azarpira N, Mokarram P. Circulating Nucleic Acids in Colorectal Cancer: Diagnostic and Prognostic Value. DISEASE MARKERS 2024; 2024:9943412. [PMID: 38380073 PMCID: PMC10878755 DOI: 10.1155/2024/9943412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 01/07/2024] [Accepted: 01/25/2024] [Indexed: 02/22/2024]
Abstract
Colorectal cancer (CRC) is the third most prevalent cancer in the world and the fourth leading cause of cancer-related mortality. DNA (cfDNA/ctDNA) and RNA (cfRNA/ctRNA) in the blood are promising noninvasive biomarkers for molecular profiling, screening, diagnosis, treatment management, and prognosis of CRC. Technological advancements that enable precise detection of both genetic and epigenetic abnormalities, even in minute quantities in circulation, can overcome some of these challenges. This review focuses on testing for circulating nucleic acids in the circulation as a noninvasive method for CRC detection, monitoring, detection of minimal residual disease, and patient management. In addition, the benefits and drawbacks of various diagnostic techniques and associated bioinformatics tools have been detailed.
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Affiliation(s)
- Somayeh Igder
- Department of Clinical Biochemistry, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Mozhdeh Zamani
- Autophagy Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
- Department of Biochemistry, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Shima Fakher
- Department of Biochemistry, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Morvarid Siri
- Autophagy Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Hassan Ashktorab
- Department of Medicine, Gastroenterology Division and Cancer Center, Howard University College of Medicine, Washington, DC, USA
| | - Negar Azarpira
- Autophagy Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Pooneh Mokarram
- Autophagy Research Center, Department of Biochemistry, Shiraz University of Medical Sciences, Shiraz, Iran
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Khalil WA, Hassan MAE, El-Harairy MA, Abdelnour SA. Supplementation of Thymoquinone Nanoparticles to Semen Extender Boosts Cryotolerance and Fertilizing Ability of Buffalo Bull Spermatozoa. Animals (Basel) 2023; 13:2973. [PMID: 37760374 PMCID: PMC10525674 DOI: 10.3390/ani13182973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 09/17/2023] [Accepted: 09/18/2023] [Indexed: 09/29/2023] Open
Abstract
Thymoquinone nanoparticles (TQNPs) are broadly utilized in numerous pharmaceutical applications. In the present study, we tested the effects of TQNP supplementation on sperm quality and kinematics, acrosome exocytosis, oxidative biomarkers, apoptosis-like and morphological changes of frozen-thawed buffalo sperm, as well as the fertilizing capacity. Semen was collected from buffalo bulls, diluted (1:10; semen/extender), and divided into five aliquots comprising various concentrations of TQNP 0 (CON), 12.5 (TQNP12.5), 25 (TQNP25), 37.5 (TQNP37.5), and 50 (TQNP50) µg/mL, and then cryopreserved and stored in liquid nitrogen (-196 °C). The results revealed that TQNPs (25 to 50 µg/mL) provided the most optimal results in terms of membrane integrity (p < 0.001) and progressive motility (p < 0.01). In contrast, TQNP50 resulted in a greater post-thawed sperm viability (p = 0.02) compared with other groups. The addition of TQNPs to the extender had no discernible effects on sperm morphology measures. Sperm kinematic motion was significantly improved in the TQNP50 group compared to the control group (p < 0.01). TQNPs effectively reduced the content of H2O2 and MDA levels and improved the total antioxidant capacity of post-thawed extended semen (p < 0.01). The addition of TQNP significantly increased the number of intact acrosomes (p < 0.0001) and decreased the number of exocytosed acrosomes (p < 0.0001). A significant reduction in apoptosis-like changes was observed in TQNP groups. The non-return rates of buffalo cows inseminated with TQNP50-treated spermatozoa were higher than those in the control group (p < 0.05; 88% vs. 72%). These findings suggested that the freezing extender supplemented with TQNPs could effectively enhance the cryotolerance and fertility of buffalo sperm.
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Affiliation(s)
- Wael A. Khalil
- Department of Animal Production, Faculty of Agriculture, Mansoura University, Mansoura 35516, Egypt
| | - Mahmoud A. E. Hassan
- Animal Production Research Institute, Agriculture Research Centre, Ministry of Agriculture, Giza 12619, Egypt;
| | - Mostafa A. El-Harairy
- Department of Animal Production, Faculty of Agriculture, Mansoura University, Mansoura 35516, Egypt
| | - Sameh A. Abdelnour
- Department of Animal Production, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt
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6
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Hassan MAE, Khalil WA, Abdelnour SA, Aman RM. Supplementation of Alpha-lipoic acid-loaded nanoliposomes in semen extender improves freezability of buffalo spermatozoa. Sci Rep 2022; 12:22464. [PMID: 36577772 PMCID: PMC9797474 DOI: 10.1038/s41598-022-26960-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Accepted: 12/22/2022] [Indexed: 12/29/2022] Open
Abstract
This research was designed to explore the protective effect of alpha-lipoic acid-loaded nanoliposomes (ALAN) during cryopreservation of buffalo sperm. Buffalo semen was cryopreserved in a tris-citrate egg yolk extender without any supplement (ALAN0, control group) or with ALAN at levels of 25, 50, 75 or 150 µg (ALAN25, ALAN50, ALAN75 and ALAN150, respectively). The ALAN had a size of 171.80 nm and a negative zeta potential (- 43.40 mV). The progressive motility, vitality and membrane integrity significantly improved in all ALAN groups (except ALAN25 for membrane integrity). ALAN150 group exhibited the best values of progressive sperm motility, vitality and membrane integrity after thawing at 37 °C for 30 s or incubated for 2 h at 37 °C and 5% CO2 compared with those in other groups. Both ALAN75 and ALAN150 groups significantly improved the TAC, GR and catalase, while lipid peroxidation and early apoptotic spermatozoa significantly decreased in ALAN150 group followed by ALAN75 group. Collectively, the adding ALAN to buffalo semen freezing extender plays a substantial shielding function against cryodamage by preserving the sperm functional parameters.
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Affiliation(s)
- Mahmoud A. E. Hassan
- grid.418376.f0000 0004 1800 7673Animal Production Research Institute, Agriculture Research Centre, Ministry of Agriculture, Dokki, Giza, 12619 Egypt
| | - Wael A. Khalil
- grid.10251.370000000103426662Department of Animal Production, Faculty of Agriculture, Mansoura University, Mansoura, 35516 Egypt
| | - Sameh A. Abdelnour
- grid.31451.320000 0001 2158 2757Department of Animal Production, Faculty of Agriculture, Zagazig University, Zagazig, 44511 Egypt
| | - Reham Mokhtar Aman
- grid.10251.370000000103426662Department of Pharmaceutics, Faculty of Pharmacy, Mansoura University, Mansoura, Dakahlia, 35516 Egypt
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Abdelnour SA, Hassan MA, El‐Ratel IT, Essawi WM, El‐Raghi AA, Lu Y, Sheiha AM. Effect of addition of L‐carnitine to cryopreservation extender on rabbit post‐thaw semen parameters, antioxidant capacity, mitochondrial function, apoptosis, and ultrastructure changes. Reprod Domest Anim 2022; 57:902-911. [DOI: 10.1111/rda.14139] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 04/26/2022] [Accepted: 04/27/2022] [Indexed: 11/29/2022]
Affiliation(s)
- Sameh A. Abdelnour
- State Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources College of Animal Science and Technology Guangxi University Nanning China
- Department of Animal Production Faculty of Agriculture Zagazig University Zagazig 44511 Egypt
| | - Mahmoud A.E. Hassan
- Animal Production Research Institute (APRI) Agriculture Research Centre Ministry of Agriculture Dokki Giza 12619 Egypt
| | - Ibrahim T. El‐Ratel
- Department of Poultry Production Faculty of Agriculture Damietta University Damietta 34517 Egypt
| | - Walaa M. Essawi
- Department of Theriogenology Faculty of Veterinary Medicine Aswan University Aswan 81528 Egypt
| | - Ali Ali El‐Raghi
- Department of Animal Production Faculty of Agriculture Damietta University Damietta 34517 Egypt
| | - Yangqing Lu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro‐Bioresources College of Animal Science and Technology Guangxi University Nanning China
| | - Asmaa M. Sheiha
- Department of Animal Production Faculty of Agriculture Zagazig University Zagazig 44511 Egypt
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Hassan SA, Khalil WA, Hassan MAE, Yousif AI, Sabry OM, Wink M, Sobeh M. Antioxidant and Antiapoptotic Effects of a Turraea fischeri Leaf Extract on Cryopreserved Goat Sperm. Animals (Basel) 2021; 11:2840. [PMID: 34679861 PMCID: PMC8532954 DOI: 10.3390/ani11102840] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 08/13/2021] [Accepted: 08/23/2021] [Indexed: 11/30/2022] Open
Abstract
This study evaluated the efficacy of Turraea fischeri leaf extract for maintaining the viability of cryopreserved goat sperm. Ejaculated semen was collected from 5 mature Baladi bucks (50-60 kg, 2-4 years of age) and those samples with mass motility ≥ 70% and sperm concentration ≥ 2.5 × 109/mL were selected, pooled, and divided into 4 aliquots. Each aliquot was diluted in Tris-citric-soybean lecithin extender containing a different concentration of T. fischeri leaf extract (0, 125, 250, or 375 µg/mL). Treated semen samples were cooled to 5 °C, transferred to 0.25-mL French straws, and stored in liquid nitrogen (LN2) at -196 °C. After thawing, membrane integrity was examined by transmission electron microscopy, apoptotic activity by Annexin/propidium iodide staining and flow cytometry, and both enzyme activities and antioxidant capacity by spectroscopic assays. The leaf extract at 375 µg/mL significantly improved semen quality as indicated by enhanced total antioxidant capacity, reduced H2O2 concentration, a greater proportion of structurally intact motile sperm, and concomitant reductions in apoptosis and necrosis. The extract also significantly increased the proportion of sperm with a contiguous plasma membrane and intact acrosome (p < 0.05). Furthermore, LC-MS revealed numerous secondary metabolites in the extract that may contribute to sperm cryopreservation.
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Affiliation(s)
- Soha A. Hassan
- Basic Science Department, Faculty of Dentistry, October 6 University, Cairo 12566, Egypt;
| | - Wael A. Khalil
- Department of Animal Production, Faculty of Agriculture, Mansoura University, Mansoura 35516, Egypt
| | - Mahmoud A. E. Hassan
- Agriculture Research Center, Animal Production Research Institute, Ministry of Agriculture, Dokki, Giza 12619, Egypt; (M.A.E.H.); (A.I.Y.)
| | - Ahmed I. Yousif
- Agriculture Research Center, Animal Production Research Institute, Ministry of Agriculture, Dokki, Giza 12619, Egypt; (M.A.E.H.); (A.I.Y.)
| | - Omar M. Sabry
- Department of Pharmacognosy, College of Pharmacy, Cairo University, Cairo 11562, Egypt;
| | - Michael Wink
- Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, 69120 Heidelberg, Germany;
| | - Mansour Sobeh
- AgroBioSciences Research, Mohammed VI Polytechnic University, Lot 660–Hay MoulayRachid, Ben Guerir 43150, Morocco
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Mohammed AK, Khalil WA, Youssef HF, Saadeldin IM, Gabr SA, Hammad ME, Mehrez AZ. Influence of adding zeolite loaded with different charges to semen extender on sperm quality in rabbits after cryopreservation. Cryobiology 2021; 103:107-115. [PMID: 34480940 DOI: 10.1016/j.cryobiol.2021.08.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Accepted: 08/30/2021] [Indexed: 11/20/2022]
Abstract
The aim of the present study was to investigate the effect of supplementing rabbit semen extender with zeolite loaded with different charges (Z+ or Z-, Z±) on sperm cryopreservation. Semen was collected from six healthy, fertile New Zealand rabbit bucks using an artificial vagina. The collected ejaculates were pooled and diluted with a tris-yolk fructose (TYF) extender supplemented with Z± (+16, +12, +8, -16, -12, and -8) at a concentration of 1% for a final sperm concentration of 25 × 106 sperm cells/mL. The diluted semen samples were then cryopreserved in 0.25 mL straws and stored in liquid nitrogen for 1 month. To evaluate sperm quality, we examined sperm progressive motility, vitality, morphological abnormalities, and plasma membrane integrity. In addition, apoptotic rates were determined using flow cytometry and by examining sperm ultrastructure under a transmission electron microscope (TEM). Moreover, total antioxidant capacity and markers of lipid peroxidation were measured in the extender after thawing. Addition of Z± had a positive effect on progressive motility, vitality, and membrane integrity after an equilibration period and post-thawing as compared with the controls (P < 0.05). Z± supplementation, particularly with a strong negative charge, also decreased the percentages of apoptotic and necrotic sperm cells compared to controls (P < 0.05), as shown both by flow cytometry and TEM. This was not associated with any marked effects on the oxidative biomarkers in the extender. In conclusion, addition of Z± to semen extender improved post-thawing sperm quality by improving sperm characteristics, decreasing apoptosis, and minimizing sperm damage during cryopreservation.
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Affiliation(s)
- Amer K Mohammed
- Animal Production Department, Faculty of Agriculture, Tanta University, Egypt.
| | - Wael A Khalil
- Animal Production Department, Faculty of Agriculture, Mansoura University, Mansoura, 35516, Egypt.
| | - Hanan F Youssef
- Ceramics, Refractories and Building Materials Department, National Research Centre, 33 El-Buhouth Street, Dokki, Cairo, 12622, Egypt.
| | - Islam M Saadeldin
- Department of Physiology, Faculty of Veterinary Medicine, Zagazig University, 44519, Zagazig, Egypt.
| | - Sherif A Gabr
- Animal Production Department, Faculty of Agriculture, Tanta University, Egypt.
| | - Mohamed E Hammad
- Animal Production Department, Faculty of Agriculture, Tanta University, Egypt.
| | - Ahmed Z Mehrez
- Animal Production Department, Faculty of Agriculture, Mansoura University, Mansoura, 35516, Egypt.
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Droplet Microfluidics with Reagent Micromixing for Investigating Intrinsic Platelet Functionality. Cell Mol Bioeng 2021; 14:223-230. [PMID: 34109001 DOI: 10.1007/s12195-020-00665-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 12/23/2020] [Indexed: 10/22/2022] Open
Abstract
Introduction Precision mapping of the functional structure of platelet populations holds great promise for the identification of hyper-reactive subtypes that are likely to be disease drivers, having value in prognostics and as therapeutic targets. However, the ability to measure the intrinsic functional capacity of individual platelets is confounded by potent paracrine cross-talk, resulting in phenotypic remodeling of the entire platelet population, and in doing so obscuring the identity of hyper-reactive platelets. Methods To address this we have developed a droplet microfluidics strategy for single platelet confinement to exclude paracrine signaling. Consideration of the Poisson distribution was used for high throughput single platelet encapsulation and the preparation of minimal platelet collectives serving as digital models for understanding the role of hyper-reactive platelets coordinating system-level behavior by paracrine signaling. Platelets are retrieved from the droplets for phenotyping using standard flow cytometry. In addition, we have incorporated a staggered herringbone micromixing element for accurate agonist and antibody dispensing in droplets. Results The methodology was used for characterizing sensitivity distributions from healthy blood donors in response to convulxin (agonist of the GPVI receptor, the major platelet receptor for collagen). P-selectin exposure and α IIb β 3 integrin activation were used as analytical end-points to demonstrate the existence of hyper-reactive platelets that direct 20-fold gains in system level sensitivity. Conclusions The analytical workflow represents an enabling tool for the accurate classification of platelet subtypes and description of their underlying biology. Supplementary information The online version of this article (10.1007/s12195-020-00665-6) contains supplementary material, which is available to authorized users.
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Effects of mint, thyme, and curcumin extract nanoformulations on the sperm quality, apoptosis, chromatin decondensation, enzyme activity, and oxidative status of cryopreserved goat semen. Cryobiology 2020; 97:144-152. [DOI: 10.1016/j.cryobiol.2020.09.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 08/18/2020] [Accepted: 09/08/2020] [Indexed: 01/02/2023]
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Islam MJ, Kunzmann A, Thiele R, Slater MJ. Effects of extreme ambient temperature in European seabass, Dicentrarchus labrax acclimated at different salinities: Growth performance, metabolic and molecular stress responses. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 735:139371. [PMID: 32473428 DOI: 10.1016/j.scitotenv.2020.139371] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 05/01/2020] [Accepted: 05/10/2020] [Indexed: 05/22/2023]
Abstract
Extreme weather events are becoming more intense and frequent as a result of climate change. The modulation of hemato-physiological potential as a compensatory response to extreme warm events combined with different salinities is poorly understood. This study aimed to assess the hemato-physiological and molecular response of European seabass, Dicentrarchus labrax exposed to extreme warm temperature (33 °C) after prior acclimatization at 32 psu, 12 psu, 6 psu, and 2 psu water. Fish were acclimated to 32 psu, 12 psu, 6 psu, and 2 psu followed by 10 days extreme warm (33 °C) exposure. Along with growth performance and survival, hemato-physiological response and molecular response of fish were recorded. Fish held at 32 psu and 2 psu exhibited significantly lower growth performance and survival than those at 12 psu and 6 psu (p < 0.05). Red blood cells (RBC), hematocrit, and hemoglobin content were significantly decreased, while white blood cells (WBC), erythrocytic cellular abnormalities (ECA) and erythrocytic nuclear abnormalities (ENA) were found to increase significantly in 32 psu and 2 psu fish (p < 0.05). Plasma lactate was found to increase significantly in 32 psu fish on day 10 (p < 0.05). Activities of glutathione peroxidase (GPx), glutathione reductase (GR), superoxide dismutase (SOD), catalase (CAT), and TNF-α expression increased significantly in 32 psu and 2 psu fish (p < 0.05). Most of the repeated measured parameters indicated limited acclimation capacity during the extreme warm exposure at all four salinity groups. However, overall results indicate that European seabass acclimatized at 12 psu and 6 psu salinities, can cope better during extreme warm exposure (33 °C).
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Affiliation(s)
- Md Jakiul Islam
- Leibniz Centre for Tropical Marine Research (ZMT), 28359 Bremen, Germany; Alfred-Wegener-Institute, Helmholtz-Center for Polar and Marine Research, 27570 Bremerhaven, Germany.
| | - Andreas Kunzmann
- Leibniz Centre for Tropical Marine Research (ZMT), 28359 Bremen, Germany
| | - Rajko Thiele
- Alfred-Wegener-Institute, Helmholtz-Center for Polar and Marine Research, 27570 Bremerhaven, Germany
| | - Matthew James Slater
- Alfred-Wegener-Institute, Helmholtz-Center for Polar and Marine Research, 27570 Bremerhaven, Germany
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Abdelnour SA, Hassan MAE, Mohammed AK, Alhimaidi AR, Al-Gabri N, Al-Khaldi KO, Swelum AA. The Effect of Adding Different Levels of Curcumin and Its Nanoparticles to Extender on Post-Thaw Quality of Cryopreserved Rabbit Sperm. Animals (Basel) 2020; 10:ani10091508. [PMID: 32858961 PMCID: PMC7552309 DOI: 10.3390/ani10091508] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 08/22/2020] [Accepted: 08/24/2020] [Indexed: 12/12/2022] Open
Abstract
Simple Summary In rabbit farms, artificial insemination is usually accepted using semen preserved around 18 °C. However, the use of cryopreserved rabbit semen is limited, due to excess oxidative stress and produce sperm dysfunction. The advancements in nanotechnology tools have allowed molecular-based targeting of cells through effective, safe, and biocompatible magnetic nanoparticles with promising potentials in reproductive sciences. In these regards, the current work aimed to explore the potential role if the effect of curcumin nanoparticles supplementation in semen extender on post/thawed rabbit sperm quality. Results revealed that the CUNPs (1.5 µg/mL) showed superior enhancements impacts for the post-thawing sperm motion and redox status, as well as a significant reduction in apoptotic and necrotic sperm cells. This confirmed the constructive application of nanoparticle to enhance the cryopreserved rabbit’s sperm function. Abstract The cryopreservation process adversely affects sperm function and quality traits, causing some changes at biochemical and structural levels, due to mechanical, thermal, osmotic, and oxidative damage. Supplementation with curcumin nanoparticles could prevent and even revert this effect and could enhance the post/thawed sperm quality in the rabbit. The study amid to explore the effect of curcumin (CU) and curcumin nanoparticles (CUNPs) supplementation in semen extender on post/thawed rabbit sperm quality. Twelve fertile, healthy rabbit bucks were included, and the ejaculates were collected using artificial vaginas. Rabbit pooled semen was cryopreserved in tris-yolk fructose (TYF) extender without any supplement (control group) or extender supplemented with CU at levels of 0.5, 1 or 1.5 µg/mL (CU0.5, CU1.0, and CU1.5, respectively) or CUNPs at levels of 0.5, 1, 1.5 (CUNPs0.5, CUNPs1.0, and CUNPs1.5, respectively) and was packed in straws (0.25 mL) and stored in liquid nitrogen (−196 °C). Results revealed that CUNPs1.5 had a positive influence (p < 0.05) on post-thawing sperm progressive motility, viability, and membrane integrity as compared with the other groups. Percentages of dead sperm, abnormalities, early apoptotic, apoptotic, and necrotic sperm cells reduced (p < 0.05) in CUNPs1.5 as compared to other treatments. Using 1.5 µg/mL of CUNPs significantly improved total antioxidant capacity (TAC), GPx, while MDA and POC reduced (p < 0.05) in CU1.5 in comparison with other groups. SOD values were enhanced (p < 0.05) in CUNPs1.0 and CUNPs1.5 in relation with other treatments. Conclusively, the addition of curcumin and its nanoparticles to the extender can improve the post-thawed quality of rabbit sperm via redox signaling and reduce the apoptosis process.
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Affiliation(s)
- Sameh A. Abdelnour
- Department of Animal Production, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt
- Correspondence: (S.A.A.); (A.A.S.)
| | | | - Amer K. Mohammed
- Department of Animal Production, Faculty of Agriculture, Mansoura University, Mansoura 35516, Egypt;
| | - Ahmad R. Alhimaidi
- Department of Zoology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Naif Al-Gabri
- Department of Pathology, Faculty of Veterinary Medicine, Thamar University, Dhamar 2153, Yemen;
- Laboratory of Regional Djibouti Livestock Quarantine, Abu Yasar international Est. 1999, Djibouti
| | | | - Ayman A. Swelum
- Department of Animal production, College of Food and Agriculture Sciences, King Saud University, P. O. Box 2460, Riyadh 11451, Saudi Arabia
- Department of Theriogenology, Faculty of Veterinary Medicine, Zagazig University, Sharkia 44519, Egypt
- Correspondence: (S.A.A.); (A.A.S.)
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Jongen MSA, MacArthur BD, Englyst NA, West J. Single platelet variability governs population sensitivity and initiates intrinsic heterotypic responses. Commun Biol 2020; 3:281. [PMID: 32499608 PMCID: PMC7272428 DOI: 10.1038/s42003-020-1002-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 05/12/2020] [Indexed: 12/15/2022] Open
Abstract
Investigations into the nature of platelet functional variety and consequences for homeostasis require new methods for resolving single platelet phenotypes. Here we combine droplet microfluidics with flow cytometry for high throughput single platelet function analysis. A large-scale sensitivity continuum was shown to be a general feature of human platelets from individual donors, with hypersensitive platelets coordinating significant sensitivity gains in bulk platelet populations and shown to direct aggregation in droplet-confined minimal platelet systems. Sensitivity gains scaled with agonist potency (convulxin > TRAP-14>ADP) and reduced the collagen and thrombin activation threshold required for platelet population polarization into pro-aggregatory and pro-coagulant states. The heterotypic platelet response results from an intrinsic behavioural program. The method and findings invite future discoveries into the nature of hypersensitive platelets and how community effects produce population level responses in health and disease. Maaike S. A. Jongen et al. combine droplet microfluidics with flow cytometry to resolve single platelet responses to agonists. They demonstrate that hyperactive platelets enhance the platelet population response by paracrine signaling as a function of agonist potency and heterotypic responses result from an intrinsic behavioural program.
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Affiliation(s)
- Maaike S A Jongen
- Faculty of Medicine, University of Southampton, Southampton, SO17 1BJ, UK
| | - Ben D MacArthur
- Faculty of Medicine, University of Southampton, Southampton, SO17 1BJ, UK.,Mathematical Sciences, University of Southampton, Southampton, SO17 1BJ, UK.,Institute for Life Sciences, University of Southampton, Southampton, SO17 1BJ, UK
| | - Nicola A Englyst
- Faculty of Medicine, University of Southampton, Southampton, SO17 1BJ, UK.,Institute for Life Sciences, University of Southampton, Southampton, SO17 1BJ, UK
| | - Jonathan West
- Faculty of Medicine, University of Southampton, Southampton, SO17 1BJ, UK. .,Institute for Life Sciences, University of Southampton, Southampton, SO17 1BJ, UK.
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Noulsri E. Quantitation of Cell-Derived Microparticles in Blood Products and Its Potential Applications in Transfusion Laboratories. Lab Med 2020; 51:452-459. [DOI: 10.1093/labmed/lmz100] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Abstract
Cell-derived microparticles (MPs) are small fragments released from various cells when they are activated or undergo apoptosis. In the field of transfusion medicine, a number of studies have documented increased levels of MPs in blood products, which have been associated with multiple factors, including donor variability, blood component processing, and storage. In addition, transfusions that contain high levels of MPs are linked to posttransfusion complications. Considering the clinical importance of MP levels, transfusion laboratories should routinely screen blood products for them. However, this practice is not yet applied routinely, perhaps in part because of a lack of understanding of how to apply MP data to transfusion medicine. We describe the methods used to quantitate MPs in blood components and discuss the application of these quantitative data in routine transfusion laboratories in order to manage quality, improve the outcomes of transfusions, and minimize their complications.
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Affiliation(s)
- Egarit Noulsri
- Research Division, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
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16
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Comparison between the Effects of Adding Vitamins, Trace Elements, and Nanoparticles to SHOTOR Extender on the Cryopreservation of Dromedary Camel Epididymal Spermatozoa. Animals (Basel) 2020; 10:ani10010078. [PMID: 31906462 PMCID: PMC7022978 DOI: 10.3390/ani10010078] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 12/26/2019] [Accepted: 12/31/2019] [Indexed: 02/06/2023] Open
Abstract
Simple Summary This is a comprehensive study to compare between the effects of different supplements (vitamins C and E, trace elements Na2SeO3 and ZnSO4, and nanoparticles of zinc oxide and selenium) to the semen extender of camel epididymal spermatozoa during cooling and freezing/thawing cryopreservation. Supplementation of the semen SHOTOR extender with zinc oxide and selenium nanoparticles lead to improved progressive motility, vitality, and anti-oxidative defense, and reduced the ultrastructural abnormalities in camel epididymal spermatozoa. Abstract There are several obstacles in camel semen cryopreservation; such as increasing semen viscosity and the reduction in motile spermatozoa after ejaculation. Epididymal spermatozoa offer an efficient alternative to overcome these problems and are well-suited for artificial insemination in camels. In the current study, we compared the effects of supplementation with vitamin C, E, inorganic trace elements of selenium (Na2SeO3) and zinc (ZnSO4), and zinc and selenium nanoparticles (ZnONPs and SeNPs, respectively) on the cryopreservation of dromedary camel epididymal spermatozoa. When the SHOTOR extender was supplemented with ZnONPs and SeNPs; the sperm showed increased progressive motility; vitality; and membrane integrity after cooling at 5 °C for 2 h; when compared to the control and vitamin-supplemented groups. Moreover, the ZnONPs and SeNPs supplementation improved the progressive motility, vitality, sperm membrane integrity, ultrastructural morphology, and decreased apoptosis when frozen and thawed. SeNPs significantly increased reduced glutathione (GSH), superoxide dismutase (SOD), and decreased lipid peroxide malondialdehyde (MDA) levels. The advantageous effects of the trace elements were potentiated by reduction into a nano-sized particle, which could increase bioavailability and reduce the undesired liberation of toxic concentrations. We recommend the inclusion of SeNPs or ZnONPs to SHOTOR extenders to improve the cryotolerance of camel epididymal spermatozoa.
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Khalil W, Abdel-Khalek AK, Falchi L, El-Saidy B, Yousif A. Effects of extender and packaging method on morphological and functional characteristics of cryopreserved Ossimi ram semen. ASIAN PACIFIC JOURNAL OF REPRODUCTION 2020. [DOI: 10.4103/2305-0500.284277] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Impact of selenium nano-particles in semen extender on bull sperm quality after cryopreservation. Theriogenology 2019; 126:121-127. [DOI: 10.1016/j.theriogenology.2018.12.017] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 11/08/2018] [Accepted: 12/04/2018] [Indexed: 11/22/2022]
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20
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The resistance against Trichinella spiralis infection induced by primary infection with respiratory syncytial virus. Parasitology 2018; 146:634-642. [PMID: 30394235 DOI: 10.1017/s0031182018001889] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Human infections with Trichinella spiralis and respiratory syncytial virus (RSV) are common, as T. spiralis infections are re-emerging in various parts of the world and RSV infections remain a threat for infants. Yet, studies investigating the relationship pertaining to the two are severely lacking. In particular, immune response induction via RSV and T. spiralis remain largely elusive. Here, we investigated the resistance against T. spiralis infection induced upon primary infection with RSV. RSV, notorious for causing severe inflammatory reaction in the lungs, were intranasally infected, followed with a T. spiralis infection in mice. Our results revealed that primary RSV infection in mice significantly raised T. spiralis-specific and total IgE, IgG and its subclass antibody responses upon T. spiralis challenge infection (RSV-Ts). Blood eosinophil levels were decreased in RSV-Ts, accompanied with significant increase in both Th1 and Th2 cytokines. Antibodies generated against RSV in RSV-infected mice were found to react with T. spiralis excretory/secretory antigen, showing several bands determined through immunoblotting. RSV-Ts also had a marked reduction of T. spiralis worm burden in diaphragm. These results indicate that immune responses induced by RSV infection contribute to resistance against subsequent T. spiralis infection.
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Sobeh M, Hassan SA, El Raey MA, Khalil WA, Hassan MAE, Wink M. Polyphenolics from Albizia harveyi Exhibit Antioxidant Activities and Counteract Oxidative Damage and Ultra-Structural Changes of Cryopreserved Bull Semen. Molecules 2017; 22:molecules22111993. [PMID: 29149062 PMCID: PMC6150411 DOI: 10.3390/molecules22111993] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2017] [Accepted: 11/12/2017] [Indexed: 11/25/2022] Open
Abstract
Albizia harveyi is a tropical deciduous tree, found across South and Eastern Africa and widely used in traditional medicine. The leaf extract ameliorated the damaging effects of the frozen-thawing process in cryopreserved bull semen. In a dose-dependent pattern, sperm motility, viability, and membrane integrity were improved compared to the untreated control. Furthermore, the extract increased the percentage of viable sperm cells and reduced the percentages of early apoptotic and apoptotic sperm cells as well as the damage in sperm ultra-structure. These activities are in agreement with the robust antioxidant properties in vitro and in the seminal fluid as observed in the total antioxidant capacity and the lipid peroxidation parameter malondialdehyde. LC-MS yielded 35 compounds. The extract was dominated by quercetin-O-galloyl-hexoside and quercetin-O-pentoside, along with other flavonoid glycosides. The polyphenols are probably responsible for the observed activities. In conclusion, the current findings show that A. harveyi leaves are rich in bioactive polyphenols with functional properties, validating its traditional use.
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Affiliation(s)
- Mansour Sobeh
- Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, Im Neuenheimer Feld 364, 69120 Heidelberg, Germany.
| | - Soha A Hassan
- Department of Basic Sciences, Faculty of Dentistry, October 6 University, Cairo 12566, Egypt.
| | - Mohamed A El Raey
- Department of Phytochemistry and Plant Systematics, National Research Center, Dokki, Cairo 12622, Egypt.
| | - Wael A Khalil
- Department of Animal Production, Faculty of Agriculture, Mansoura University, Mansoura 35516, Egypt.
| | | | - Michael Wink
- Institute of Pharmacy and Molecular Biotechnology, Heidelberg University, Im Neuenheimer Feld 364, 69120 Heidelberg, Germany.
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Absolute circulating pericyte progenitor cell counts in mice by flow cytometry: comparison of 2 single-platform technologies. Int J Biol Markers 2015; 30:e434-8. [PMID: 26109365 DOI: 10.5301/jbm.5000156] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/05/2015] [Indexed: 11/20/2022]
Abstract
BACKGROUND Accumulating evidence indicates that circulating pericyte progenitor cells (CPPCs) may be angiogenic biomarkers in cancer and diabetes. Their validity as biomarkers depends on the accuracy of techniques used for enumeration. In this report, absolute CPPC counts were performed by 2 single-platform technologies. The reliability of the 2 methods, including retest reliability and intraobserver and interobserver variability, was assessed according to the intraclass correlation coefficient (ICC). The linear correlation and agreement among both methods were assessed, and the stability of CPPC numbers in blood samples was analyzed. METHODS The blood samples were obtained from ICR mice. The samples were processed through a no-lyse, 1-wash procedure, and Syto16+CD45-CD31-CD140b+ CPPCs were analyzed by exclusion of dead cells and by fluorescence-minus-one control. CPPCs were enumerated by 2 methods: bead-based 123count eBeads count (eBioscience) and direct volume-based Accuri C6 Flow Cytometer count (BD). The cells were measured immediately and after storage of blood samples for 24 and 48 hours. RESULTS There were excellent retest correlations and intraobserver and interobserver agreement in both methods. The 2 methods showed a high linear correlation (R2 = 0.923) and with a high level of agreement (0.986). It was demonstrated that CPPCs are unstable in blood samples. CONCLUSIONS In this study, 2 reproducible protocols for CPPC quantification were established. These protocols should facilitate future studies to further define the role of CPPCs as cellular biomarkers.
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Bozza WP, Di X, Takeda K, Rivera Rosado LA, Pariser S, Zhang B. The use of a stably expressed FRET biosensor for determining the potency of cancer drugs. PLoS One 2014; 9:e107010. [PMID: 25188024 PMCID: PMC4154796 DOI: 10.1371/journal.pone.0107010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Accepted: 08/10/2014] [Indexed: 11/19/2022] Open
Abstract
Many cancer drugs are intended to kill cancer cells by inducing apoptosis. However, the potency assays used for measuring the bioactivity of these products are generally cell viability assays which do not distinguish between cell death and growth inhibition. Here we describe a cell-based fluorescence resonance energy transfer (FRET) biosensor designed to measure the bioactivity of apoptosis inducing cancer drugs. The biosensor contains cyan fluorescent protein (CFP) linked via caspase 3 and caspase 8 specific cleavage recognition sequences to yellow fluorescent protein (YFP). Upon caspase activation, as in the case of apoptosis induction, the linker is cleaved abolishing the cellular FRET signal. This assay closely reflects the mechanism of action of cancer drugs, in killing cancer cells and therefore can function as a potency test for different cancer drugs. We rigorously demonstrate this through characterization of a class of proteins targeting the death receptors. The one-step assay appears to be superior to other apoptosis-based assays because of its simplicity, convenience, and robustness.
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Affiliation(s)
- William P. Bozza
- Division of Therapeutic Proteins, Office of Biotechnology Products, Center for Drug Evaluation and Research, Food and Drug Administration, Silver Spring, Maryland, United States of America
| | - Xu Di
- Division of Therapeutic Proteins, Office of Biotechnology Products, Center for Drug Evaluation and Research, Food and Drug Administration, Silver Spring, Maryland, United States of America
| | - Kazuyo Takeda
- Microscopy and Imaging Core Facility, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, Maryland, United States of America
| | - Leslie A. Rivera Rosado
- Division of Therapeutic Proteins, Office of Biotechnology Products, Center for Drug Evaluation and Research, Food and Drug Administration, Silver Spring, Maryland, United States of America
| | - Sarah Pariser
- Division of Therapeutic Proteins, Office of Biotechnology Products, Center for Drug Evaluation and Research, Food and Drug Administration, Silver Spring, Maryland, United States of America
- Brown University, Providence, Rode Island, United States of America
| | - Baolin Zhang
- Division of Therapeutic Proteins, Office of Biotechnology Products, Center for Drug Evaluation and Research, Food and Drug Administration, Silver Spring, Maryland, United States of America
- * E-mail:
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Evaluation of an easy and affordable flow cytometer for volumetric haematopoietic stem cell counting. BLOOD TRANSFUSION = TRASFUSIONE DEL SANGUE 2014; 12:416-20. [PMID: 24887218 DOI: 10.2450/2014.0198-13] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Accepted: 11/19/2013] [Indexed: 11/21/2022]
Abstract
BACKGROUND Accurate estimation of haematopoietic stem cell (HSC) counts by flow cytometry may be difficult in laboratories in which sophisticated equipment and staff with specific expertise are not available. Affordable flow cytometers that can perform basic functions may help to overcome these difficulties. In this study we compared HSC and leucocyte counts determined by volumetric and bead-based protocols performed with the small, low-cost Accuri(®) C6, with those obtained with two gold-standard instruments, the four-colour FACSCalibur(®) and the eight-colour FACSCantoII(®), our reference flow cytometers. MATERIALS AND METHODS With the three cytometers we tested, in parallel, 111 consecutive samples from cord blood, peripheral blood from patients with myelofibrosis and myeloproliferative syndromes, fresh and thawed HSC collected by apheresis and bone marrow products. The findings were compared with one-way ANOVA, Bland-Altman analysis and linear regression. RESULTS The results of HSC and leucocyte enumeration by the three devices were strongly correlated (r(2)>0.99; p<0.0001). ANOVA performed on different subgroups of samples did not reveal significant differences between HSC count determined by the C6 bead-based and reference flow cytometers in any of the subgroups. Regarding the C6 volumetric protocol, a statistically significant difference was observed only in the cord blood subgroup. Time for instrument set-up, calibration and analysis was slightly longer with Accuri(®) C6 (40 min) than with FACSCantoII(®) (30 min). DISCUSSION Accuri(®) C6 is a reliable instrument for HSC enumeration in fresh samples, using both volumetric and bead-based approaches, although the volumetric protocol on cord blood samples needs to be improved. The Accuri(®) C6 is easy to use, does not require profound knowledge of flow cytometry and could be employed in an urgent setting. Its performance may be improved by more efficient calibration and shorter analysis time.
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