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Pfizer’s Protease Inhibitor New Drug Development for SARS-CoV-2 for 2021 Looks Promising

Image Credit: Alexyz3d / Shutterstock

By Lawrence Jones, PhD

Protease inhibitor technology used commonly as a strategy to treat HIV and hepatitis C is now a strategy for SARS-CoV-2 antiviral therapy development. Researchers for SARS-CoV-2 have focused on “main protease (Mpro) which plays a dominant role in processing CoV-encoded polyproteins which mediate the assembly of replication-transcription machinery and is thus recognized as an ideal antiviral target (Cui, et. al, 2020.” The SARS-CoV-2 antiviral therapy development may consist of repurposed drugs as the push for a breakthrough is not only a goal by Pfizer but other biopharma companies in pursuit. “The first protease inhibitor to be approved by the US Food and Drug Administration (FDA) was saquinavir, in December 1995, and within months, two other protease inhibitors, ritonavir, and indinavir were approved (Cully, 2018).”

So far, Pfizer has been able to deliver to the public. Thus, the company has been a significant player during the SARS-CoV-2 vaccine production and distribution with effective outcomes regarding their vaccine efficacy and ability to produce the quantity of vaccine needed. Pfizer’s protease inhibitor outlook for the first U.S.-approved SARS-CoV-2 therapeutics is fast-tracked to their initial clinical phase 1 trial. Pfizer’s early stage one clinical trial on an oral antiviral therapy that can treat a SARS-CoV-2 patient effectively is now on the horizon. The quest to get the SARS-CoV-2 pandemic under control is continuing with urgency and caution.

The aim of the drug is for the first developing symptoms, which according to Pfizer (March 23, 20201), would make it the first oral antiviral treatment of its kind for coronavirus. Pfizer (March 23, 2021) “the trial is randomized and includes placebo groups with both single and multiple-dose studies.” What is promising is that the Pfizer company “is also studying an intravenous antiviral to treat SARS-CoV-2, which will become an option for some hospitalized patients over time.” Pfizer’s “PF-07321332 “protease inhibitor” has been formulated to attack the “spine” of the SARS-CoV-2 virus and stop it replicating in our nose, throats, and lungs.”

Pfizer’s Chief Scientific Officer, Mikael Dolsten reports that he is hopeful that their early raises the prospects of a cure for future pandemic threats. For now, laboratory “invitro” for animal tolerance is of the foremost importance before being tested in humans. Clinical trials will be intensive, and the screening and dosing steps and outcomes of the dosing step will be crucial for determining the drug’s safety and tolerability. The upcoming months of 2021 and early 2022 look very promising for technology combination therapies to mitigate SARS-CoV-2 infections.


Butz, B. (March 23, 2021). Pfizer launches trial for novel oral SARS-COV-2 therapeutic.

Cui, W., Yang, K., & Yang, H. (2020). Recent progress in the drug development targeting SARS-CoV-2 main protease as treatment for COVID-19. Frontiers in molecular biosciences,

Cully, M. (November 28, 2018). Protease inhibitors give wings to combination therapy.

Holzberg, E. (March 23, 2021). Pfizer Testing A Pill To Treat Covid. Pfizer Testing A Pill To Treat Covid (

Lucy, P. (April 28, 2021). Pfizer CEO says oral SARS-COV-2 pill could be ready by the end of the year.

Pfizer (March 23, 2021). Pfizer initiates phase 1 study of novel oral antiviral therapeutic agent against sars-cov-2.

Biotechnology Health Management and Care's Observed Trends for Early 2021

Blog post by Lawrence Jones, Ph.D.

2021 will be a year that forecasts and trends from a few years ago that came to a halt are now at the forefront of technical publications again. For instance, a year ago, emerging trends in biotechnology proved exciting as we embarked on an optimistic future of long-awaited drug developments for Alzheimer’s disease. Biogen’s FDA filing for new drugs was promising as they acquired from Pfizer Incorporated’s a novel drug for the potential treatment of patients with behavioral and neurological symptoms. However, with the onset of the scientific focus, health focus, and public health focus of SARS-Cov-2, this biotech topic dominated many of the projected trends of 2020.

The vaccine industry has been revamped and tweaked in ways that we have never seen before. I could touch on the up and coming vaccines, therapies, and strategies for SARS-Cov-2 and the variants that appear in various parts of the world and country; however, there are daily updates about this topic. Nevertheless, 2021, like 2020 and 2019, will continue to utilize and improve technologies that apply genome editing beyond traditional human drug development. Veterinary Medicine, which continues to enhance animal livestock, and animal agriculture, will evolve like never. The launch of Prime Medicine by David Liu, Ph.D., and associates has developed a technology geared for creating or correcting any single-base transition mutations and treating sickle cell disease.

The development of the two mRNA vaccines by Pzier and Moderna, currently being used to vaccinate millions of Americans and people worldwide, are new technologies that will enhance gene therapy innovation strategies for health care in the future. 2021 will reveal official and unofficial partnerships of various companies evaluating their portfolios. Digital therapeutics will also continue to play significant roles in monitoring and tracking disease and infection rates and health management. Research and development for SARS-CoV-2 disease control methods through various treatment by way of therapeutic antibodies, therapeutic antivirals, and vaccines (whole virus, RNA or mRNA based, non-replicating viral vector, and protein subunit) will continue to be at the forefront.

There will be continual surveillance through PCR (molecular) tests to detect the virus’s genetic material to determine the presence of active infection with SARS-CoV-2. More rapid antigen testing to see pieces of proteins that make up the SARS-CoV-2 virus to determine the presence of active disease with SARS-CoV-2 is also at the forefront of innovation. Serology tests for antibodies against SARS-CoV-2 and SARS-CoV-2 variants in the blood will continue to be a 2021 trend. More importantly, having effective distribution strategies and real-time communication for the public and patients receiving a vaccine will be vital to gaining control and protecting millions of people.

The Quest for Universal Vaccines

Blog Post by: Lawrence Jones, Ph.D.

Universal vaccines may be a game changer for future infections. Researchers say a universal flu vaccine could be within reach sooner rather than later, although though it may be years before a vaccine is ready for human use (Farzan, 2020).Farzan (2020) mentions on National Public Radio (NPR) that: “in the future, one vaccination for a given pathogen could provide protection from multiple flu strains, and perhaps last longer than a single season.” Routh (April 3, 2019) reported last year that the first clinical trial of an innovative universal influenza vaccine candidate was successfully initiated and the main effort for now is to assess the vaccine’s safety and tolerability.

Ultimately, the objective is the vaccine’s ability to induce an immune response in healthy volunteers. The CDC (2020) estimates that the flu shot reduces your risk of getting infected by 40% to 60%, assuming the statistically determined strains for the upcoming season match the vaccine. The end of the school year for many schools across the United States will take place withinthe next week or so. Many discussions and strategies are already in the planning phase for face-to-face school interactions in the fall, as it reflects the various phases of easing state restrictions pertaining to COVID-19 containment. What will the fall look like for student and employee health?

Currently, influenza vaccinations records are, in most instances, a requirement for a child’s health profile. The 2021-2022 school year in the United States may be the first year where there may be real promise of a COVID-19 vaccine. Although a vaccination for COVID-19 is still six to 12 months away, the discussion of a universal vaccine has become even more important. A universal SARS vaccine for combatting future outbreaks and coronavirus infections will be ideal. Severe acute respiratory syndrome coronavirus (SARS-CoV-1) is a contagious and sometimes fatal respiratory illness that was identified about 18 years ago and it looks like it is here to stay.

For most day care facilities, elementary and secondary schools, most likely, health updates and school records will require certain health standards as they pertain to vaccination records, necessary for school enrollment and employment. Conventional influenza vaccines are designed to stimulate distinct neutralizing antibodies to attack highly variable hemagglutinin antigens. Sometimes these seasonal vaccines are suboptimal for rapidly changing influenza viruses. Nevertheless, some protection is needed and new technologies for developing influenza vaccines are on the horizon. Achieving a consensus among scientists and health professionals on a common definition, “including scope of protection and clinical endpoints, may help to focus research efforts.”

The National Institute of Allergy and Infectious Diseases, a branch of the NIH, says it will likely be another 10 to 15 years before a universal flu vaccine is on the market.Vaccines for smallpox, mumps and rubella are longer lasting but the changes and mutations in influenza and now SARS-CoV-2 will be a tough battle. Given the current need, is it likely that a universal SARS vaccine may be available before a universal flu vaccine?


Farzan, S. (February 27, 2020). Researchers Step Up Efforts To Develop A ‘Universal’ Flu Vaccine. National Public Radio.

Ostrowsky, J., Arpey, M., Moore, K., Osterholm, M., Friede, M., Gordon, J., … & Bresee, J. (2020). Tracking progress in universal influenza vaccine development. Current Opinion in Virology, 40, 28-36.

Routh, J. (April 3, 2019). NIH begins first-in-human trial of a universal influenza vaccine candidate. National Institutes of Health.

Reprint from the Hopkins Biotech Network:

​Using Aptamers in Vaccine Innovation for 2020

Blog Post by: Lawrence Jones, Ph.D.

In these times of the COVID-19 pandemic there is a race to find cures and vaccines throughout the world get control of the viral threat. According to Marketwatch (April 9, 2020) they report that 21 companies are working tirelessly on coronavirus treatments or vaccines. I am not going to review those 21 company vaccine efforts however, the link below in the references has been provided. More so I am touching on the use of aptamers in vaccine development and pharmaceutical therapy in times such as this. With time being of the essence for faster production of vaccines and other pharmaceuticals, aptamer use in vaccine technology has emerged among topics of discussion. From what I understand, aptamer technology has been around for decades but in the recent decade it was been used more in the development of vaccine technology.

The use of aptamers has attracted the attention of many scientists that are seeking customized ways that would otherwise takes perhaps a year or years to develop in an antibody production. “Aptamers are oligonucleotides, such as ribonucleic acid (RNA) and single-strand deoxyribonucleic acid (ssDNA) or peptide molecules that can bind to their molecular targets with high affinity and specificity due to their specific three-dimensional structures”( Song, 2012). Aptamers have all the general advantages of antibodies, but also have benefits of thermal stability, low cost production, and increasingly unlimited applications. Aptamers are known as alternatives to antibodies. Lui and associates (2020)point out in their recent publication that there are “two Korean patents that describe the use of RNA aptamers for inhibition of SARS viruses: patent (1) application (KR2009128837) identifies RNA aptamers as anti-SARS agents capable of binding to and inhibiting the double-stranded DNA unwinding of the SARS virus helicase; patent (2) application (KR 2012139512) describes RNA aptamers with distinct affinity for the nucleocapsid of SARS-CoV for potential pharmaceutical use.

Numerous analytical techniques, such as electrochemical, colorimetric, optical, and mass-sensitive methods, can be utilized to detect targets, due to convenient modifications and the stability of aptamers. Finally, several medical and analytical applications of aptamers are presented. In summary, aptamers are promising materials for diverse areas, not just as alternatives to antibodies, but as the core components of medical and analytical equipment

“Aptamers usually consist of 15 to 50 nucleotides and have an molecular weight ranging from 5 to 15 kDa.37” (Kaur, et. al, 2018). They have a low immunogenicity because nucleic acids are generally not recognized by the human immune system.Hidding (2016) points out that disadvantages of aptamers may be solved by using antibodies instead and choosing both in combination with aptamers in order to get synergistic effects could amplify each other’s strengths(p.17). Combinations of the two during this covid-19 viral threat could result in very promising therapeutics. Aptamers are an alternative to antibodies in many biological applications based on the literature.I highly encourage reading more about apatamers. More to come about the applications in the upcoming months and years.


Baird, G. (2014) .Application of Aptamers in the Clinical Laboratory - Geoffrey Baird, MD, PhD

Hidding, J. (2016). A therapeutic battle: Antibodies vs. Aptamers. Nanoscience master program, 1-20.

Kaur, H., Bruno, J. G., Kumar, A., & Sharma, T. K. (2018). Aptamers in the therapeutics and diagnostics pipelines. Theranostics, 8(15), 4016.

Lee, J. (April 9. 2020).These 21 companies are working on coronavirus treatments or vaccines here’s where things stand.

Liu, C., Zhou, Q., Li, Y., Garner, L. V., Watkins, S. P., Carter, L. J., ... & Albaiu, D. (2020). Research and development on therapeutic agents and vaccines for COVID-19 and related human coronavirus diseases.

Reinemann, C., & Strehlitz, B. (2014). Aptamer-modified nanoparticles and their use in cancer diagnostics and treatment. Swiss medical weekly, 144(0102).

Song, K. M., Lee, S., & Ban, C. (2012). Aptamers and their biological applications. Sensors, 12(1), 612-631

Wolter, O., & Mayer, G. (2017). Aptamers as valuable molecular tools in neurosciences. Journal of Neuroscience, 37(10), 2517-2523.

Transformational Leadership in Innovation

Blog Post by: Lawrence Jones, Ph.D.

Amabile and Khaire (2008) report that creativity means “the ability to create something novel and appropriate” (p.1). Appreciating what each person must bring to the table of creativity is very vital to a leader promoting innovation within an organization. Amabile and Khaire add that the importance of a leader’s role in not only fostering creativity in employees and organizations but specifically engaging the key people to create and innovate.

Countless articles and books have published about the application of creativity and innovation in business, industry, government, and education (Black,2012, p.13).Black adds that various perspectives of creativity and innovation have debated in the literature depicting the varying values and depths to where creativity and innovation emerge. Identifying what enhances creativity in followers and what discourages creativity is crucial for leadership effectiveness for change.Transformational leadership has gained recognition in the literature as an inspirational and motivational leadership which is very crucial in the early stages of entrepreneurship and innovation (Gardner and Avolio,1998).

The legendary Schumpeter (1934) wrote that the heart of entrepreneurship originates through the very creativity and networks which can eventually lead to innovation. A current thought leader in creativity, Owens (2011), professes that organizations may unconsciously kill innovation based on their intrinsic culture practices and their unwillingness to try new approaches.The book “Creative People Must be Stopped”, Owen writes that some firms may be unaware that a creativity- sabotaging-culture may be affecting innovation. He submits that six constraints can inhibit creativity in an environment, and those constraints are individual constraints, group constraints, organizational constraints, industry constraints, technology constraints, and societal constraints (p. 8).

Owens (2011) explains that individual constraints in this context are when individuals believe that they do not think they are different (p. 8).Another component for constraints is that groups may unknowingly allow negative emotions to evaluate new ideas.Janis (1972) proffers that the concept of groupthink is a deterioration of mental efficiency in the interest of the group (p. 9).The next component of organizations is designed to produce consistent results however when innovation that threatens the output of consistent results then the situation may be grim. The ability to consider and adopt new technologies may require a proven reliability and effectiveness (Owens, 2011, p.10).

Owens (2011) also proposes that a way to enhance innovations is that an individual must improve their overall cognitive skills and recognize their value and embrace relevant new ideas (p. 10). Another recommendation is that groups must be designed to support collaboration, risk-taking, and transparent communication.New ideas must be considered legitimate and acceptable. Lastly, for new technologies, there must be significant investment and development (p.12).

Transformational leaders should recognize the importance of creativity in advancing their organizational goals.By developing the ability to lead for creativity, they will be able to solve problems that matter and to compete effectively in a world where people are looking for products and services that meet their needs.Leaders should consider steps they can take to foster a culture where creativity thrives and adopt structures to support that culture.For example, some organizations may benefit from formally establishing creativity teams, whereas others may choose to have innovation departments.


Amabile, T. M., & Khaire, M. (2008). Creativity and the role of the leaders. Harvard Business Review.

Bass, B. M. (1985). Leadership and performance beyond expectations. Free Press; Collier Macmillan.

Black, R. A. (2012). Keep creativity alive. Communication World, 29(2), 13.

Brown, T. (2016). Teaching Creativity to Leaders. Harvard Business Review.

Gardner, W. L., & Avolio, B. J. (1998). The charismatic relationship: A dramaturgical perspective. Academy of management review, 23(1), 32-58.

Janis, I. L. (1972). Victims of groupthink: a psychological study of foreign-policy decisions and fiascoes.

Owens, D. A. (2011). Creative People must be stopped: 6 ways we kill Innovation (Without even trying). John Wiley & Sons.

Schumpeter, J. A. (1934). The theory of economic development: An inquiry into profits, capital, credit, interest, and the business cycle (Vol. 55). Transaction publishers

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