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Premadasa LS, Dailey GP, Ruzicka JA, Taylor EW. Selenium-Dependent Read Through of the Conserved 3'-Terminal UGA Stop Codon of HIV-1 nef. AMERICAN JOURNAL OF BIOPHARMACY AND PHARMACEUTICAL SCIENCES 2021; 1:1. [PMID: 35128545 PMCID: PMC8813066 DOI: 10.25259/ajbps_6_2021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The HIV-1 nef gene terminates in a 3'-UGA stop codon, which is highly conserved in the main group of HIV-1 subtypes, along with a downstream potential coding region that could extend the nef protein by 33 amino acids, if readthrough of the stop codon occurs. Antisense tethering interactions (ATIs) between a viral mRNA and a host selenoprotein mRNA are a potential viral strategy for the capture of a host selenocysteine insertion sequence (SECIS) element (Taylor et al, 2016) [1]. This mRNA hijacking mechanism could enable the expression of virally encoded selenoprotein modules, via translation of in-frame UGA stop codons as selenocysteine (SeC). Here we show that readthrough of the 3'-terminal UGA codon of nef occurs during translation of HIV-1 nef expression constructs in transfected cells. This was accomplished via fluorescence microscopy image analysis and flow cytometry of HEK 293 cells, transfected with engineered GFP reporter gene plasmid constructs, in which GFP can only be expressed by translational recoding of the UGA codon. SiRNA knockdown of thioredoxin reductase 1 (TR1) mRNA resulted in a 67% decrease in GFP expression, presumably due to reduced availability of the components involved in selenocysteine incorporation for the stop codon readthrough, thus supporting the proposed ATI. Addition of 20 nM sodium selenite to the media significantly enhanced stop codon readthrough in the pNefATI1 plasmid construct, by >100%, supporting the hypothesis that selenium is involved in the UGA readthrough mechanism.
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Affiliation(s)
- Lakmini S. Premadasa
- Department of Chemistry and Biochemistry, Patricia A. Sullivan Science Building PO Box 26170, Greensboro, NC 27402
| | - Gabrielle P. Dailey
- Department of Chemistry and Biochemistry, Patricia A. Sullivan Science Building PO Box 26170, Greensboro, NC 27402
| | - Jan A. Ruzicka
- Department of Basic Pharmaceutical Sciences, Fred C. Wilson School of Pharmacy, High Point University, One University Parkway High Point, NC 27268
| | - Ethan W. Taylor
- Department of Chemistry and Biochemistry, Patricia A. Sullivan Science Building PO Box 26170, Greensboro, NC 27402
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Alagawany M, Attia YA, Farag MR, Elnesr SS, Nagadi SA, Shafi ME, Khafaga AF, Ohran H, Alaqil AA, Abd El-Hack ME. The Strategy of Boosting the Immune System Under the COVID-19 Pandemic. Front Vet Sci 2021; 7:570748. [PMID: 33490124 PMCID: PMC7820179 DOI: 10.3389/fvets.2020.570748] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 08/24/2020] [Indexed: 01/07/2023] Open
Abstract
The novel coronavirus (SARS-CoV-2) infection (COVID-19) has raised considerable concern on the entire planet. On March 11, 2020, COVID-19 was categorized by the World Health Organization (WHO) as a pandemic infection, and by March 18, 2020, it has spread to 146 countries. The first internal defense line against numerous diseases is personalized immunity. Although it cannot be claimed that personalized nutrition will have an immediate impact on a global pandemic, as the nutritional interventions required a long time to induce beneficial outcomes on immunity development, nutritional strategies are still able to clarify and have a beneficial influence on the interplay between physiology and diet, which could make a positive contribution to the condition in the next period. As such, a specific goal for every practitioner is to evaluate different tests to perceive the status of the patient, such as markers of inflammation, insulin regulation, and nutrient status, and to detect possible imbalances or deficiencies. During the process of disease development, the supplementation and addition of different nutrients and nutraceuticals can influence not only the viral replication but also the cellular mechanisms. It is essential to understand that every patient has its individual needs. Even though many nutrients, nutraceuticals, and drugs have beneficial effects on the immune response and can prevent or ameliorate viral infections, it is essential to detect at what stage in COVID-19 progression the patient is at the moment and decide what kind of nutrition intervention is necessary. Furthermore, understanding the pathogenesis of coronavirus infection is critical to make proper recommendations.
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Affiliation(s)
- Mahmoud Alagawany
- Department of Poultry, Faculty of Agriculture, Zagazig University, Zagazig, Egypt
| | - Youssef A. Attia
- Agriculture Department, Faculty of Environmental Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
- The Strategic Center to Kingdom Vision Realization, King Abdulaziz University, Jeddah, Saudi Arabia
- Animal and Poultry Production Department, Faculty of Agriculture, Damanhour University, Damanhour, Egypt
| | - Mayada R. Farag
- Forensic Medicine and Toxicology Department, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - Shaaban S. Elnesr
- Department of Poultry Production, Faculty of Agriculture, Fayoum University, Fayoum, Egypt
| | - Sameer A. Nagadi
- Agriculture Department, Faculty of Environmental Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Manal E. Shafi
- Department of Biological Sciences, Zoology, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Asmaa F. Khafaga
- Department of Pathology, Faculty of Veterinary Medicine, Alexandria University, Alexandria, Egypt
| | - Husein Ohran
- Department of Physiology, Veterinary Faculty, University of Sarajevo, Sarajevo, Bosnia and Herzegovina
| | - Abdulaziz A. Alaqil
- Department of Animal and Fish Production, King Faisal University, Al-Hufof, Saudi Arabia
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Alagawany M, Attia YA, Farag MR, Elnesr SS, Nagadi SA, Shafi ME, Khafaga AF, Ohran H, Alaqil AA, Abd El-Hack ME. The Strategy of Boosting the Immune System Under the COVID-19 Pandemic. Front Vet Sci 2020. [PMID: 33490124 DOI: 10.3389/2ffvets.2020.570748] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/30/2023] Open
Abstract
The novel coronavirus (SARS-CoV-2) infection (COVID-19) has raised considerable concern on the entire planet. On March 11, 2020, COVID-19 was categorized by the World Health Organization (WHO) as a pandemic infection, and by March 18, 2020, it has spread to 146 countries. The first internal defense line against numerous diseases is personalized immunity. Although it cannot be claimed that personalized nutrition will have an immediate impact on a global pandemic, as the nutritional interventions required a long time to induce beneficial outcomes on immunity development, nutritional strategies are still able to clarify and have a beneficial influence on the interplay between physiology and diet, which could make a positive contribution to the condition in the next period. As such, a specific goal for every practitioner is to evaluate different tests to perceive the status of the patient, such as markers of inflammation, insulin regulation, and nutrient status, and to detect possible imbalances or deficiencies. During the process of disease development, the supplementation and addition of different nutrients and nutraceuticals can influence not only the viral replication but also the cellular mechanisms. It is essential to understand that every patient has its individual needs. Even though many nutrients, nutraceuticals, and drugs have beneficial effects on the immune response and can prevent or ameliorate viral infections, it is essential to detect at what stage in COVID-19 progression the patient is at the moment and decide what kind of nutrition intervention is necessary. Furthermore, understanding the pathogenesis of coronavirus infection is critical to make proper recommendations.
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Affiliation(s)
- Mahmoud Alagawany
- Department of Poultry, Faculty of Agriculture, Zagazig University, Zagazig, Egypt
| | - Youssef A Attia
- Agriculture Department, Faculty of Environmental Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
- The Strategic Center to Kingdom Vision Realization, King Abdulaziz University, Jeddah, Saudi Arabia
- Animal and Poultry Production Department, Faculty of Agriculture, Damanhour University, Damanhour, Egypt
| | - Mayada R Farag
- Forensic Medicine and Toxicology Department, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - Shaaban S Elnesr
- Department of Poultry Production, Faculty of Agriculture, Fayoum University, Fayoum, Egypt
| | - Sameer A Nagadi
- Agriculture Department, Faculty of Environmental Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Manal E Shafi
- Department of Biological Sciences, Zoology, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Asmaa F Khafaga
- Department of Pathology, Faculty of Veterinary Medicine, Alexandria University, Alexandria, Egypt
| | - Husein Ohran
- Department of Physiology, Veterinary Faculty, University of Sarajevo, Sarajevo, Bosnia and Herzegovina
| | - Abdulaziz A Alaqil
- Department of Animal and Fish Production, King Faisal University, Al-Hufof, Saudi Arabia
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