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Talha NAH, Jeon Y, Yu I. Effect of Synthetic Cholesterol (Synthechol®) Supplementation in an Egg Yolk-free Extender on Dog Sperm Cryopreservation. CRYOLETTERS 2022; 43:99-109. [DOI: 10.54680/fr22210110212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
BACKGROUND: SyntheChol® is a new synthetic, non-animal-derived cholesterol that is easily dissolved in ethanol, ready to use, and behaves in a similar way as natural cholesterol. Therefore, it could be used as a substitute of natural cholesterol in dog sperm freezing
extender. OBJECTIVE: To evaluate the effect of supplementing an egg yolk-free (EY-free) extender with synthetic cholesterol (SyntheChol®) on cryopreserved dog sperm. MATERIALS AND METHODS: Spermatozoa (1 × 108 sperm/mL) were suspended in EY-free
extender supplemented with 0% (control), 0.25, 0.5, 1, 2, 4, or 6% SyntheChol® (Extender 1), cooled at 4 °C for 1 h, and diluted (1:1, v/v) with Extender 1 containing 1 M glycerol. The spermatozoa were then cooled to 4 °C for 30 min. Sperm-containing straws were frozen
using LN2 vapor. Sperm motility (computer-assisted sperm analysis, CASA), sperm membrane integrity (SYBR-14 and PI staining), and acrosome integrity (FITC-PSA) were evaluated after thawing. Thereafter, optimal concentrations were determined (0.25, 0.5, 1, or 2%) and used to evaluate
reactive oxygen species (ROS) generation, apoptosis, and the gene expression of motility-related sperm mitochondria-associated cysteine-rich protein, apoptosis-related B-cell lymphoma 2 (BCL2), and BCL2-associated X protein ( BAX) in cryopreserved sperm. RESULTS:
Sperm progressive motility, membrane integrity, and acrosome integrity were markedly greater in the SyntheChol®-supplemented groups (0.25, 0.5, 1, or 2%) than in the control group. Only BAX expression was significantly reduced in the SyntheChol® groups
(0.25, 1, or 2%) compared with the control group. However, there were no significant effects on the ROS generation or apoptosis index. CONCLUSION: SyntheChol® (0.25, 1, or 2%) proved to be effective in reducing the BAX gene expression level and improving sperm
progressive motility, and membrane and acrosome integrity.
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Affiliation(s)
- Nabeel Abdelbagi Hamad Talha
- Laboratory of Theriogenology and Reproductive Biotechnology, College of Veterinary Medicine and Bio-safety Research Institute, Jeonbuk National University, Republic of Korea
| | - Yubyeol Jeon
- Laboratory of Theriogenology and Reproductive Biotechnology, College of Veterinary Medicine and Bio-safety Research Institute, Jeonbuk National University, Republic of Korea
| | - Il‐Jeoung Yu
- Laboratory of Theriogenology and Reproductive Biotechnology, College of Veterinary Medicine and Bio-safety Research Institute, Jeonbuk National University, Republic of Korea
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Sampey D, Courville P, Acree D, Hausfeld J, Bentley WE. Enhanced expression of a biosimilar monoclonal antibody with a novel NS0 platform. Biotechnol Prog 2018; 34:455-462. [DOI: 10.1002/btpr.2596] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 12/18/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Darryl Sampey
- BioFactura, Inc., 8435 Progress Drive, Suite Z; Frederick MD 21701
| | - Pascal Courville
- BioFactura, Inc., 8435 Progress Drive, Suite Z; Frederick MD 21701
| | - David Acree
- BioFactura, Inc., 8435 Progress Drive, Suite Z; Frederick MD 21701
| | - Jeffrey Hausfeld
- BioFactura, Inc., 8435 Progress Drive, Suite Z; Frederick MD 21701
| | - William E. Bentley
- Maryland Center of Excellence in Regulatory Science and Innovation (CERSI), University of Maryland, College Park; MD 20742
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Sun Y, Mei L, Han N, Ding X, Yu C, Yang W, Ruan G. Examining the Roles of Emulsion Droplet Size and Surfactant in the Interfacial Instability-Based Fabrication Process of Micellar Nanocrystals. NANOSCALE RESEARCH LETTERS 2017; 12:434. [PMID: 28709375 PMCID: PMC5509569 DOI: 10.1186/s11671-017-2202-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 06/16/2017] [Indexed: 06/07/2023]
Abstract
The interfacial instability process is an emerging general method to fabricate nanocrystal-encapsulated micelles (also called micellar nanocrystals) for biological detection, imaging, and therapy. The present work utilized fluorescent semiconductor nanocrystals (quantum dots or QDs) as the model nanocrystals to investigate the interfacial instability-based fabrication process of nanocrystal-encapsulated micelles. Our experimental results suggest intricate and intertwined roles of the emulsion droplet size and the surfactant poly (vinyl alcohol) (PVA) used in the fabrication process of QD-encapsulated poly (styrene-b-ethylene glycol) (PS-PEG) micelles. When no PVA is used, no emulsion droplet and thus no micelle is successfully formed; Emulsion droplets with large sizes (~25 μm) result in two types of QD-encapsulated micelles, one of which is colloidally stable QD-encapsulated PS-PEG micelles while the other of which is colloidally unstable QD-encapsulated PVA micelles; In contrast, emulsion droplets with small sizes (~3 μm or smaller) result in only colloidally stable QD-encapsulated PS-PEG micelles. The results obtained in this work not only help to optimize the quality of nanocrystal-encapsulated micelles prepared by the interfacial instability method for biological applications but also offer helpful new knowledge on the interfacial instability process in particular and self-assembly in general.
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Affiliation(s)
- Yuxiang Sun
- Department of Biomedical Engineering, College of Engineering and Applied Sciences, Nanjing University, Nanjing, China
- Collaborative Innovation Center of Chemistry for Life Sciences, Nanjing University, Nanjing, China
| | - Ling Mei
- Department of Biomedical Engineering, College of Engineering and Applied Sciences, Nanjing University, Nanjing, China
- Collaborative Innovation Center of Chemistry for Life Sciences, Nanjing University, Nanjing, China
| | - Ning Han
- Department of Biomedical Engineering, College of Engineering and Applied Sciences, Nanjing University, Nanjing, China
- Collaborative Innovation Center of Chemistry for Life Sciences, Nanjing University, Nanjing, China
| | - Xinyi Ding
- Department of Biomedical Engineering, College of Engineering and Applied Sciences, Nanjing University, Nanjing, China
- Collaborative Innovation Center of Chemistry for Life Sciences, Nanjing University, Nanjing, China
| | - Caihao Yu
- Department of Biomedical Engineering, College of Engineering and Applied Sciences, Nanjing University, Nanjing, China
- Collaborative Innovation Center of Chemistry for Life Sciences, Nanjing University, Nanjing, China
| | - Wenjuan Yang
- Collaborative Innovation Center of Chemistry for Life Sciences, Nanjing University, Nanjing, China
- Department of Materials Science and Engineering, College of Engineering and Applied Sciences, Nanjing University, Nanjing, China
| | - Gang Ruan
- Department of Biomedical Engineering, College of Engineering and Applied Sciences, Nanjing University, Nanjing, China.
- Collaborative Innovation Center of Chemistry for Life Sciences, Nanjing University, Nanjing, China.
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Chauhan G, Schmelzer AE. A novel cholesterol/lipid delivery system for murine myeloma cell lines. Biotechnol Prog 2017; 33:795-803. [DOI: 10.1002/btpr.2441] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Revised: 12/09/2016] [Indexed: 01/24/2023]
Affiliation(s)
- Gaurav Chauhan
- Department of Cell Culture and Fermentation SciencesMedImmune, One Medimmune WayGaithersburg MD20878
| | - Albert E. Schmelzer
- Department of Cell Culture and Fermentation SciencesMedImmune, One Medimmune WayGaithersburg MD20878
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