PHILIP CLAY BRYAN, MD

OKLAHOMA CITY, OK

Research Active
Surgery NPI registered 21+ years 50 publications 1992 – 2025 NPI: 1104828359
Amino Acid SequenceModels, MolecularUnited KingdomImmunoglobulin GMagnetic Resonance SpectroscopyCrystallography, X-RayBacterial ProteinsKineticsBinding SitesMolecular Sequence DataProtein FoldingProtein ConformationCircular DichroismThermodynamicsSubtilisins

Practice Location

1000 N LEE AVE
OKLAHOMA CITY, OK 73102-1036

Phone: (405) 340-2346

What does PHILIP BRYAN research?

Dr. Philip Clay Bryan studies how to make medical treatments and devices safer and more effective. His research includes developing a new type of torso stabilizer for individuals with spinal cord injuries, allowing them freedom of movement while preventing falls. Additionally, he examines methods to enhance drug development, like using patient-centric approaches to collect samples at home, which can make participation in clinical trials easier and more comfortable. He also investigates the safety of vaccines and treatments for different patient groups, ensuring that medications work as intended without unexpected side effects.

Key findings

  • Developed a torso stabilizer for spinal cord injury patients that improves natural movement while preventing falls by locking at the right moment.
  • 75% of children and youth with perinatal HIV had some level of resistance to antiretroviral drugs, necessitating better treatment strategies.
  • In a study of 1.29 million children, the meningococcal vaccine showed no significant safety issues, ensuring a reliable immunization option.
  • Participants using a topical lotion combined with diet and exercise lost 1.2 cm in thigh circumference, demonstrating increased fat loss compared to those using a placebo.
  • Microsampling techniques have been found to improve drug research efficiency, with 38% of organizations reporting their use in regulatory submissions.

Frequently asked questions

Does Dr. Bryan study spinal cord injuries?
Yes, he has researched device improvements for spinal cord injury patients to enhance their mobility and prevent falls.
What vaccinations has Dr. Bryan researched?
He has studied the safety of the meningococcal and pertussis vaccines, finding them safe for infants and pregnant women respectively.
Is Dr. Bryan's work relevant to patients with HIV?
Yes, his research highlights drug resistance among children with HIV and emphasizes the need for better treatment monitoring.
What improvements in drug trials has Dr. Bryan contributed to?
He has focused on patient-centric sampling methods that allow patients to participate more comfortably in clinical trials.
How does Dr. Bryan's research impact vaccine safety?
His studies provide recommendations for improving vaccine safety monitoring, especially in low- and middle-income countries.

Publications in plain English

Multi-Stakeholder Call to Action for the Future of Vaccine Post-Marketing Monitoring: Proceedings from the First Beyond COVID-19 Monitoring Excellence (BeCOME) Conference.

2025

Drug safety

Bauchau V, Bollaerts K, Bryan P, Buttery J, Davis K +24 more

PubMed

Case Studies on the Use of Patient-centric Sampling for Clinical Studies in Pharmaceutical Drug Development.

2025

The AAPS journal

Patel S, Baratta M, Bryan P, Kopel H, Lowes S +6 more

Plain English
This study looked at new ways to collect blood samples for drug trials, focusing on methods that allow patients to collect samples at home instead of going to a clinic. It found that patient-centric sampling (PCS) can improve recruiting more participants, especially from different backgrounds, while making the process less painful and more efficient. For instance, using PCS during the COVID-19 pandemic made it easier to continue important studies, as patients could participate without traveling. Who this helps: Patients benefit from a more convenient and comfortable participation experience in clinical trials.

PubMed

Design and Preliminary Evaluation of a Torso Stabiliser for Individuals with Spinal Cord Injury.

2025

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference

Varghese RJ, Tong MY, Szczech I, Bryan P, Aronson-Arminoff M +2 more

Plain English
This research focused on creating a new type of torso stabiliser for people with spinal cord injuries, as existing options can be too rigid and restrictive. The new device allows for natural movement but can lock to provide support when it detects the person is about to fall, needing about 55-60 cm of movement to work effectively. This is important because it can help prevent falls and improve daily activities for those affected by spinal injuries. Who this helps: This benefits patients with spinal cord injuries.

PubMed

Collaboration within the global vaccine safety surveillance ecosystem during the COVID-19 pandemic: lessons learnt and key recommendations from the COVAX Vaccine Safety Working Group.

2024

BMJ global health

Chandler RE, Balakrishnan MR, Brasseur D, Bryan P, Espie E +9 more

Plain English
This study looked at how the global vaccine safety system worked during the COVID-19 pandemic, focusing on the COVAX program, which distributes vaccines worldwide. It found that improving safety monitoring in low- and middle-income countries, improving communication about vaccine safety data, and better collaboration between public health officials and vaccine makers are crucial for future vaccine safety efforts. This matters because it can ensure that vaccines are safe and effective for everyone, regardless of where they live. Who this helps: This helps patients and public health officials in low- and middle-income countries.

PubMed

Case Studies on the use of Microsampling for Nonclinical Studies in Pharmaceutical Drug Discovery and Development.

2024

The AAPS journal

Patel SR, Barricklow J, Bryan P, Rospo C, Spooner N +3 more

Plain English
This study looked at how using microsampling techniques in drug research can reduce the number of animals needed and make procedures less invasive, all while providing better data. For example, these methods allow researchers to collect more information from the same animals over time. This is important because it not only improves animal welfare but also enhances the reliability of research results. Who this helps: This benefits researchers, animal welfare advocates, and ultimately, patients seeking new medications.

PubMed

Simulation studies to understand sensitivity and timing characteristics of an optical property modulation-based radiation detection concept for PET.

2020

Physics in medicine and biology

Tao L, Jeong D, Wang J, Adams Z, Bryan P +1 more

Plain English
This study explored a new way to enhance the detection of gamma rays used in positron emission tomography (PET) by examining how light properties of materials can change when they interact with these rays. The researchers found that individual photons from PET scans could be detected with an enhanced timing precision estimated to be as low as 1.2 picoseconds. This improvement is crucial because it could lead to more accurate imaging in medical diagnoses. Who this helps: Patients needing precise imaging for conditions like cancer.

PubMed

An unusual case of acquired facial pigmentation.

2020

BMJ (Clinical research ed.)

Bryan P, Lloyd-Lavery A

PubMed

Effects of a topical lotion containing aminophylline, caffeine, yohimbe, l-carnitine, and gotu kola on thigh circumference, skinfold thickness, and fat mass in sedentary females.

2019

Journal of cosmetic dermatology

Escalante G, Bryan P, Rodriguez J

Plain English
This study looked at how a lotion containing aminophylline, caffeine, yohimbe, l-carnitine, and gotu kola affected thigh fat and size in inactive women. After 28 days of using this lotion along with a low-calorie diet and walking program, participants saw a greater reduction in thigh circumference (1.2 cm compared to 0.8 cm), skinfold thickness (3.7 mm compared to 2.0 mm), and fat mass (100 g compared to 57.3 g) compared to those who used a placebo. This is important because it shows that adding Lipoxyderm™ can enhance fat loss from the thighs when combined with diet and exercise. Who this helps: This helps women looking to reduce thigh fat and improve their body composition.

PubMed

Microsampling for quantitative bioanalysis, an industry update: output from an AAPS/EBF survey.

2019

Bioanalysis

Patel SR, Bryan P, Spooner N, Timmerman P, Wickremsinhe E

Plain English
Researchers studied how widely microsampling techniques are used in drug development by surveying 39 organizations involved in bioanalysis. They found that while these techniques are becoming more common, especially in nonclinical studies, they are not yet universal—about 38% reported using microsampling data in regulatory submissions. This is significant because microsampling can help collect samples in ways that standard methods can’t, leading to better data and more effective drug development. Who this helps: This helps drug developers and researchers improve how they gather and analyze data for new medications.

PubMed

Safety of multicomponent meningococcal group B vaccine (4CMenB) in routine infant immunisation in the UK: a prospective surveillance study.

2018

The Lancet. Child & adolescent health

Bryan P, Seabroke S, Wong J, Donegan K, Webb E +3 more

Plain English
This study looked at the safety of the multicomponent meningococcal group B vaccine (4CMenB) when given to infants in the UK as part of routine immunization. Out of about 1.29 million children who received approximately 3 million doses, only 902 reports of possible adverse reactions were recorded, with 41% being local reactions like pain where the shot was given and 40% involving fever. Overall, the vaccine did not show significant safety issues, and most children continued to receive their other routine vaccinations on schedule, which is important for public health. Who this helps: This helps infants and their parents by ensuring a safe vaccination option against meningococcal disease.

PubMed

Techniques for quantitative LC-MS/MS analysis of protein therapeutics: advances in enzyme digestion and immunocapture.

2016

Bioanalysis

Fung EN, Bryan P, Kozhich A

Plain English
This research focuses on improving methods for measuring protein-based drugs in complex biological samples, such as blood. The study highlights how using enzymes to break down proteins and special agents to isolate these drugs can lead to better and more accurate measurements. This is important because it allows for precise data on proteins in the body, which can help in cases where traditional methods don’t work, like measuring antibody-drug complexes. Who this helps: This benefits doctors and researchers working with protein therapeutics and helps improve patient treatment monitoring.

PubMed

Prevalence and Persistence of Varicella Antibodies in Previously Immunized Children and Youth With Perinatal HIV-1 Infection.

2016

Clinical infectious diseases : an official publication of the Infectious Diseases Society of America

Purswani MU, Karalius B, Yao TJ, Schmid DS, Burchett SK +53 more

Plain English
This study looked at how well a chickenpox vaccine works in children infected with HIV from birth and those who were exposed but not infected. Researchers found that 82% of the HIV-infected children and 97% of the uninfected ones had protective antibodies against chickenpox. Interestingly, those who received two vaccine doses had over 94% success at protecting against the virus, especially when they started treatment for HIV before getting vaccinated. Who this helps: This research benefits children with HIV and their healthcare providers by showing the importance of timely vaccinations and treatment.

PubMed

Antiretroviral Drug Resistance Among Children and Youth in the United States With Perinatal HIV.

2016

Clinical infectious diseases : an official publication of the Infectious Diseases Society of America

Van Dyke RB, Patel K, Kagan RM, Karalius B, Traite S +55 more

Plain English
The study looked at 234 children and young people in the US who were born with HIV. It found that 75% of them had resistance to antiretroviral medications, which is much higher than the typical rate of 36% to 44% found in other patients. This is important because it means that these young individuals may not respond well to standard HIV treatments, especially if they have high viral loads. Who this helps: This information benefits doctors working with young HIV patients and the patients themselves, as it highlights the need for tailored treatment approaches.

PubMed

Implementing dried blood spot sampling for clinical pharmacokinetic determinations: considerations from the IQ Consortium Microsampling Working Group.

2015

The AAPS journal

Evans C, Arnold M, Bryan P, Duggan J, James CA +10 more

PubMed

Safety of pertussis vaccination in pregnant women in UK: observational study.

2014

BMJ (Clinical research ed.)

Donegan K, King B, Bryan P

Plain English
This study looked at the safety of the pertussis vaccine in pregnant women in the UK. It analyzed data from 20,074 vaccinated women and found no increased risk of stillbirth or other serious complications during pregnancy compared to unvaccinated women. This is important because it supports the safety of the vaccine amid rising cases of whooping cough, ensuring that health policies can protect both mothers and babies. Who this helps: This benefits pregnant women, newborns, and healthcare providers.

PubMed

Phase I study to assess the pharmacokinetics and the effect on cardiac repolarization of amrubicin and amrubicinol in patients with advanced solid tumors.

2013

Cancer chemotherapy and pharmacology

Chen N, Chawla SP, Chiorean EG, Read WL, Gorbaty M +6 more

Plain English
This study looked at how the drug amrubicin and its active form, amrubicinol, affect the heart's electrical activity in patients with advanced solid tumors. Researchers treated 24 patients and found that amrubicinol peaked in the blood 2-4 hours after administration, while only a slight increase in heart rhythm was observed, not exceeding 10.20 milliseconds, which is generally considered safe. This matters because it shows that amrubicin and amrubicinol are unlikely to cause significant heart problems at the doses tested, making them safer options for patients undergoing cancer treatment. Who this helps: Patients with advanced solid tumors receiving treatment with amrubicin.

PubMed

Bivalent human papillomavirus vaccine and the risk of fatigue syndromes in girls in the UK.

2013

Vaccine

Donegan K, Beau-Lejdstrom R, King B, Seabroke S, Thomson A +1 more

Plain English
This research studied the safety of the Cervarix vaccine, which protects against certain types of human papillomavirus (HPV) that can lead to cervical cancer. The findings showed that reports of chronic fatigue syndrome in girls who received the vaccine were similar to expected rates, indicating that the vaccine does not increase the risk of developing fatigue syndromes. Specifically, the rates were 0.94 in young girls aged 12-20, and for 187 girls studied, there was no increased risk in the year after vaccination (rate was 1.07). Who this helps: This helps patients, particularly young girls receiving vaccinations, and their families by providing reassurance about the vaccine's safety.

PubMed

Nonclinical dose formulation: out of specification investigations.

2012

The AAPS journal

Appleton T, Bryan P, Contos D, Henry TR, Lehmann P +7 more

Plain English
This study looked at how to properly investigate issues when the concentration of drug formulations used in safety tests doesn't meet required standards. The researchers found that there are no clear guidelines for these types of investigations, leading to variations in how they are conducted. Improving the way these investigations are done is important to ensure safer and more effective drug development. Who this helps: This helps researchers and pharmaceutical companies developing new medications.

PubMed

No increased risk of febrile convulsions after seasonal influenza immunisation in UK.

2011

Lancet (London, England)

Bryan P, Seabroke S

PubMed

Risk of convulsions in children after monovalent H1N1 (2009) and trivalent influenza vaccines: a database study.

2011

Vaccine

Stowe J, Andrews N, Bryan P, Seabroke S, Miller E

Plain English
This study looked at whether children who received the H1N1 flu vaccine in 2009 were at a higher risk of having convulsions compared to those who got the seasonal flu vaccine. The researchers examined records from 2,366 children under 10 years old and found no overall increase in convulsions after vaccination with either the H1N1 vaccine or the seasonal flu vaccine. However, there was a possible higher risk of convulsions in the first few days after the second dose of the H1N1 vaccine, but this finding requires more investigation. Who this helps: This information helps parents, doctors, and public health officials understand the safety of flu vaccinations for children.

PubMed

Expression, purification, and characterization of recombinant human transferrin from rice (Oryza sativa L.).

2010

Protein expression and purification

Zhang D, Nandi S, Bryan P, Pettit S, Nguyen D +2 more

Plain English
This study focused on creating a safe and effective version of a protein called transferrin, which is important for helping cells take in iron and is used in producing medications. Researchers successfully produced this protein in rice, achieving a high yield of 1% of the rice seed weight, and purified it to over 95% purity. This rice-based transferrin works the same way as the natural form and offers a safer, cheaper alternative to using transferrin from human or animal sources, which can carry contamination risks. Who this helps: This benefits patients and drug manufacturers by providing a safer option for producing vaccines and protein-based treatments.

PubMed

H1N1 vaccine safety: real-time surveillance in the UK.

2010

Lancet (London, England)

Bryan P, Seabroke S, Davies C

PubMed

Nonclinical dose formulation analysis method validation and sample analysis.

2010

The AAPS journal

Whitmire ML, Bryan P, Henry TR, Holbrook J, Lehmann P +4 more

Plain English
This study looked at methods for testing and confirming the consistency and stability of drug formulations used in nonclinical research (testing done before drugs are approved for human use). The researchers found that current guidelines for validating these testing methods are lacking, and they proposed new best practices to ensure that the drug formulations being tested are accurate and reliable. This matters because having clear guidelines helps ensure that medications are safe and effective before they reach patients. Who this helps: This helps researchers and pharmaceutical companies working on drug development.

PubMed

Simian immunodeficiency virus (SIV) infection influences the level and function of regulatory T cells in SIV-infected rhesus macaques but not SIV-infected sooty mangabeys.

2007

Journal of virology

Pereira LE, Villinger F, Onlamoon N, Bryan P, Cardona A +5 more

Plain English
This study looked at how a virus similar to HIV affects certain immune cells in two types of monkeys: rhesus macaques, which get sick from the virus, and sooty mangabeys, which do not. The researchers found that the amount of regulatory T cells, which help control the immune response, decreased significantly in the sick rhesus macaques but stayed stable in the healthy sooty mangabeys. These differences are important because they may help improve our understanding of how to boost immune responses in patients with HIV. Who this helps: This helps researchers and doctors working on HIV treatments.

PubMed

Optimization of in vitro expansion of macaque CD4 T cells using anti-CD3 and co-stimulation for autotransfusion therapy.

2006

Journal of medical primatology

Onlamoon N, Hudson K, Bryan P, Mayne AE, Bonyhadi M +5 more

Plain English
This study focused on improving the growth of a specific type of immune cells called CD4 T cells from macaques, which are important for fighting infections. The researchers found that using a special combination of antibodies (anti-CD3 and anti-CD28) helped these cells grow better, resulting in a strong response against a virus called SIV. However, despite trying various methods to enhance growth, including adding certain nutrients and cells, the most effective way was simply to create the best initial conditions for these cells. Who this helps: This benefits researchers and doctors working to develop improved cell therapies for patients with weakened immune systems.

PubMed

Structure, dynamics, and stability variation in bacterial albumin binding modules: implications for species specificity.

2006

Biochemistry

He Y, Rozak DA, Sari N, Chen Y, Bryan P +1 more

Plain English
Researchers studied how certain protein modules in bacteria bind to albumin, a protein found in blood, to see how different structures affect their ability to attach to various species of albumin. They found that one particular module, called PSD-1, binds to both human and guinea pig albumins more tightly than a previously studied module, but it is actually less flexible. This finding challenges previous ideas about how flexibility relates to the ability to bind to different species and could improve our understanding of bacterial infections and their interaction with hosts. Who this helps: This helps doctors and researchers working to develop better treatments for bacterial infections in patients.

PubMed

Setting the standard for community-based care & creating a comprehensive continuum of care.

2003

Caring : National Association for Home Care magazine

Bellome JA, Bryan P

Plain English
This study looked at how home health services and adult day care programs can work together to support people with chronic illnesses at home. The research found that when these two types of services collaborate, they can improve patient care while also reducing costs. This is important because it creates a more efficient way for patients to get the care they need without having to go to a hospital or facility. Who this helps: Patients with chronic illnesses and their families.

PubMed

Tuberculosis skin testing among HIV-infected pregnant women in Miami, 1995 to 1996.

2002

Journal of perinatology : official journal of the California Perinatal Association

Schulte JM, Bryan P, Dodds S, Potter M, Onorato IM +1 more

Plain English
This study looked at tuberculosis (TB) skin testing among pregnant women in Miami who are infected with HIV, during 1995 to 1996. Out of 207 women evaluated, 21% tested positive for TB, and only 1% had active TB disease. These findings highlight the importance of routine TB screening in prenatal care for HIV-infected women, especially those from high-risk backgrounds. Who this helps: This helps pregnant women with HIV and their healthcare providers.

PubMed

Structural basis of thermostability. Analysis of stabilizing mutations in subtilisin BPN'.

2002

The Journal of biological chemistry

Almog O, Gallagher DT, Ladner JE, Strausberg S, Alexander P +2 more

Plain English
The research studied two modified versions of an enzyme called subtilisin BPN' to understand how specific changes can make it more stable at higher temperatures. The first variant, S63, is 75 times more stable than the regular enzyme, while the second variant, S88, is 1000 times more stable because of additional changes, including a new bond between two parts of the protein. This research is important because more stable enzymes could be used in industrial processes and medical applications where high temperatures are a factor. Who this helps: This helps researchers and manufacturers looking to improve the performance of enzymes in various applications.

PubMed

A novel scheme for the reporting of adverse drug reactions.

2001

Archives of disease in childhood

Clarkson A, Ingleby E, Choonara I, Bryan P, Arlett P

Plain English
This study looked at a new program to track adverse drug reactions (ADRs) in children in the Trent region. In its first year, the program received 95 reports of ADRs, a significant rise from 40 reports the year before. This increase shows that focused efforts like education and reminders can greatly improve the reporting of drug-related issues in children, which is crucial for ensuring their safety in medical treatments. Who this helps: This benefits patients, particularly children taking medications, as well as their doctors.

PubMed

A response to 'measles, mumps, rubella vaccine: through a glass, darkly' by Drs AJ Wakefield and SM Montgomery and published reviewers' comments.

2001

Adverse drug reactions and toxicological reviews

Arlett P, Bryan P, Evans S

PubMed

Aortic valve graft implantation in rats: a new functional model.

2000

The Journal of thoracic and cardiovascular surgery

Légaré JF, Nanton MA, Bryan P, Lee TD, Ross DB

Plain English
This study looked at how well aortic valve grafts work in rats after causing damage to their native aortic valves. Researchers found that after injuring the valves, all rats (100%) had successful graft implants without any issues at four weeks, showing that the grafts stayed open and allowed normal valve motion. This research is important because it creates a new way to study the immune responses that cause heart valve grafts to fail in humans. Who this helps: This helps researchers and doctors working on improving heart valve treatments.

PubMed

Crystal structure of calcium-independent subtilisin BPN' with restored thermal stability folded without the prodomain.

1998

Proteins

Almog O, Gallagher T, Tordova M, Hoskins J, Bryan P +1 more

Plain English
This study examined a modified version of an enzyme called subtilisin BPN' that was created without a protein helper called prodomain. Researchers found that this modified enzyme, known as Sbt70, folded into a stable shape similar to the natural enzyme and retained high activity, confirming that it can function effectively without the prodomain. Specifically, Sbt70 has several changes made to it for better stability and was able to crystallize successfully at room temperature. Who this helps: This research benefits scientists developing enzymes for industrial applications by providing insights into how to create more stable enzyme forms.

PubMed

Calcitonin responsiveness and receptor expression in porcine and murine osteoclasts: a comparative study.

1998

Bone

Galvin RJ, Bryan P, Venugopalan M, Smith DP, Thomas JE

Plain English
This study examined how porcine (pig) and murine (mouse) bone cells called osteoclasts respond to a hormone called calcitonin (CT), which is important in controlling bone health. It found that when this hormone was added, it reduced the activity of osteoclasts in both species, especially in mice, where the reduction reached up to 70%. Understanding these differences is crucial for developing better treatments for bone diseases in animals and humans. Who this helps: This helps researchers and doctors treating bone-related conditions in both humans and animals.

PubMed

Paediatric echocardiography by telemedicine--nine years' experience.

1997

Journal of telemedicine and telecare

Finley JP, Sharratt GP, Nanton MA, Chen RP, Bryan P +2 more

Plain English
This study looked at a telemedicine service that allowed pediatric heart examinations to be done over video from a specialized hospital to six regional hospitals in Canada. Between 1995 and 1996, they conducted 135 remote echocardiography exams, mainly for urgent cases involving newborns, and found that the images were of high quality and diagnoses were consistent with in-person exams. The service not only provided accurate results but also saved around $100,000 in transportation costs by preventing unnecessary patient transfers. Who this helps: This benefits patients, especially newborns and children who need quick heart assessments without the stress of traveling.

PubMed

pKa measurements from nuclear magnetic resonance for the B1 and B2 immunoglobulin G-binding domains of protein G: comparison with calculated values for nuclear magnetic resonance and X-ray structures.

1997

Biochemistry

Khare D, Alexander P, Antosiewicz J, Bryan P, Gilson M +1 more

Plain English
This study examined how certain parts of a protein called protein G behave in different pH levels using a technique called nuclear magnetic resonance (NMR). Researchers measured specific acidity levels (pKa values) for 12 areas of the protein and found that these experimental values often matched better with X-ray structures than with some NMR structures. This is important because understanding how these proteins behave in different environments can help improve drug design and protein engineering. Who this helps: This helps researchers and scientists working on drug development and protein studies.

PubMed

Crystal structure analysis of subtilisin BPN' mutants engineered for studying thermal stability.

1996

Advances in experimental medicine and biology

Gilliland GL, Gallagher DT, Alexander P, Bryan P

Plain English
The study looked at four modified versions of an enzyme called subtilisin BPN' to understand how changes to its structure affect its stability at high temperatures. Among these variants, the most stable one (S22) was created by making several specific changes, including the addition of a stabilizing bond, which allowed it to maintain its function better than the others. This is important because understanding and improving enzyme stability can help in a variety of applications, including industrial processes and medical treatments where enzymes are used. Who this helps: This benefits researchers and companies that develop enzymes for industrial and medical use.

PubMed

Isolation of 20 glycosides from the starfish Henricia downeyae, collected in the Gulf of Mexico.

1996

Journal of natural products

Palagiano E, Zollo F, Minale L, Iorizzi M, Bryan P +2 more

Plain English
Researchers studied glycosides from the starfish Henricia downeyae found in the Gulf of Mexico and identified 20 compounds, including 13 new types. They found that extracts from these starfish could inhibit bacterial and fungal growth, prevent barnacle and bryozoan larvae from settling, and deter fish feeding. This research highlights the potential of these starfish compounds for developing new antifouling agents and antibiotics. Who this helps: This benefits scientists and companies developing new marine-based medications and coatings.

PubMed

N-peptidyl, O-acyl hydroxamates: comparison of the selective inhibition of serine and cysteine proteinases.

1996

Biochimica et biophysica acta

Demuth HU, Schierhorn A, Bryan P, Höfke R, Kirschke H +1 more

Plain English
This study looked at new compounds designed to block specific types of enzymes called proteinases, which play roles in various diseases. Researchers found that one compound was particularly effective in inhibiting cathepsin L, acting nearly 932,000 times faster than a related enzyme, while another compound worked best on a different enzyme called thermitase with a much lower speed of 1.170. Understanding how these inhibitors work is important because it can lead to better treatments for conditions where these enzymes are involved. Who this helps: Patients with diseases linked to these proteinases.

PubMed

Development and characterization of a porcine model to study osteoclast differentiation and activity.

1996

Bone

Galvin RJ, Bryan P, Horn JW, Rippy MK, Thomas JE

Plain English
This research focused on creating a new model using pig cells to study a type of bone cell called osteoclasts, which are important for bone health. The study found that when they treated pig bone marrow cells with a specific vitamin D form (1,25-D3), the number of osteoclasts increased significantly—up to 50 times more compared to untreated cells. This model is important because it offers a better way to understand how these cells work, which can lead to improved treatments for bone diseases. Who this helps: This helps researchers and doctors working on bone health and related conditions.

PubMed

Chemical and biological investigation of the polar constituents of the starfish Luidia clathrata, collected in the Gulf of Mexico.

1995

Journal of natural products

Iorizzi M, Bryan P, McClintock J, Minale L, Palagiano E +3 more

Plain English
Researchers studied a starfish called Luidia clathrata from the Gulf of Mexico and found ten new substances along with three known ones that can prevent fish from eating them. The extracts from the starfish stopped barnacle and bryozoan larvae from settling and inhibited the growth of some bacteria. This matters because these compounds could help in developing natural marine coatings or antibacterial agents. Who this helps: This benefits marine biologists and the pharmaceutical industry.

PubMed

Catalysis of a protein folding reaction: mechanistic implications of the 2.0 A structure of the subtilisin-prodomain complex.

1995

Biochemistry

Bryan P, Wang L, Hoskins J, Ruvinov S, Strausberg S +4 more

Plain English
This study looked at a protein called subtilisin and how a specific part of it, known as the prodomain, helps it fold properly. The researchers found that the prodomain significantly speeds up the folding process of subtilisin by more than 10 million times, making it much more efficient. Understanding how this works is important because it can lead to improvements in how enzymes are produced for various applications, including in medicine. Who this helps: This helps patients who benefit from enzyme therapies and doctors involved in their development.

PubMed

The prosegment-subtilisin BPN' complex: crystal structure of a specific 'foldase'.

1995

Structure (London, England : 1993)

Gallagher T, Gilliland G, Wang L, Bryan P

Plain English
This research studied how a bacterial enzyme called subtilisin BPN' (SBT) folds into its mature form, which is crucial for its function. The scientists discovered that a specific part of the enzyme, known as its prosegment, helps SBT fold properly by forming a strong bond with it; this connection is essential for the enzyme's activity and stability. Understanding this process is important because it could lead to better ways of producing and using enzymes in various applications, such as in industry or medicine. Who this helps: This helps patients needing enzymes for treatments and researchers developing new enzymatic therapies.

PubMed

Assessment of stability differences in the protein G B1 and B2 domains from hydrogen-deuterium exchange: comparison with calorimetric data.

1995

Biochemistry

Orban J, Alexander P, Bryan P, Khare D

Plain English
This study looked at two parts of a protein called G, specifically the B1 and B2 domains, to see how stable they are under different temperature conditions. The researchers found that the B1 domain is generally more stable than B2, with different parts of the protein exchanging atoms at rates that indicate their stability. For example, two specific amino acids (Y3 and T18) in the B1 domain were found to exchange much slower than in B2, showing that they contribute to B1's overall strength. Who this helps: This research benefits scientists and researchers working on protein engineering, aiming to design stronger proteins for medical applications.

PubMed

Two crystal structures of the B1 immunoglobulin-binding domain of streptococcal protein G and comparison with NMR.

1994

Biochemistry

Gallagher T, Alexander P, Bryan P, Gilliland GL

Plain English
This research examined the structure of a specific part of a bacterial protein called the B1 domain from streptococcal protein G. The scientists discovered that the structure of this domain is similar in two different crystal forms, with a very small difference of about 0.25 angstroms between them. Understanding this protein's structure is important because it helps scientists compare it with similar proteins, which can lead to better treatments for infections caused by streptococcal bacteria. Who this helps: This benefits researchers and healthcare professionals working on treatments for bacterial infections.

PubMed

Hydrogen-deuterium exchange in the free and immunoglobulin G-bound protein G B-domain.

1994

Biochemistry

Orban J, Alexander P, Bryan P

Plain English
This study looked at how proteins change when they bind to antibodies, specifically a protein called GB2. Researchers found that when GB2 is free, it undergoes changes that are consistent with a cooperative unfolding process, while binding to antibodies leads to a more complex behavior with some areas of the protein becoming much more stable than others. This is important because understanding protein interactions can help improve drug design and disease treatments. Who this helps: This helps researchers and doctors develop better therapies that target specific proteins in diseases.

PubMed

Calcium-independent subtilisin by design.

1993

Proteins

Gallagher T, Bryan P, Gilliland GL

Plain English
This study created a modified version of a protein called subtilisin that doesn't rely on calcium to function. Researchers found that removing a section of the protein's structure made it easier to analyze and understand how proteins fold. This discovery is significant because it enhances our ability to study protein behavior and potentially develop new applications in biotechnology. Who this helps: This benefits researchers and scientists studying protein folding and design.

PubMed

Catalysis of a protein folding reaction: thermodynamic and kinetic analysis of subtilisin BPN' interactions with its propeptide fragment.

1993

Biochemistry

Strausberg S, Alexander P, Wang L, Schwarz F, Bryan P

Plain English
This study focused on how a specific protein, subtilisin, folds into its active form with the help of a propeptide—a small piece of protein that assists in the process. The researchers found that while the propeptide speeds up the folding of a mutant subtilisin that lacks calcium, the folding is slow for the regular subtilisin. Specifically, the initial step of forming a complex between the propeptide and the unfolded subtilisin happens at a rate of about 500 collisions per second, with the following step occurring rapidly afterward. Who this helps: This research benefits scientists studying protein folding and may assist in developing therapies for related diseases.

PubMed

An engineered disulfide cross-link accelerates the refolding rate of calcium-free subtilisin by 850-fold.

1993

Biochemistry

Strausberg S, Alexander P, Wang L, Gallagher T, Gilliland G +1 more

Plain English
This study looked at how modifying the subtilisin protein helps it fold more quickly. Researchers found that introducing a special link between specific parts of the protein made it fold 700 to 850 times faster at room temperature compared to a version without this modification. This is important because faster folding can improve the efficiency of producing enzymes for various applications, including medical and industrial uses. Who this helps: This benefits researchers and companies working on enzyme production for medical treatments.

PubMed

Kinetic analysis of folding and unfolding the 56 amino acid IgG-binding domain of streptococcal protein G.

1992

Biochemistry

Alexander P, Orban J, Bryan P

Plain English
This study examined how a specific part of a protein called the IgG-binding domain of streptococcal protein G folds and unfolds. Researchers found that the folding process happens quickly and is affected by temperature and changes in energy states. For instance, the transition from the unfolded to a compact state involves a significant decrease in heat capacity and a loss of disorder, which means the protein becomes more organized. Who this helps: This research helps scientists and healthcare professionals understand protein behavior, which could aid in developing better treatments and therapies.

PubMed

Frequent Co-Authors

P Alexander T Gallagher Suzie Seabroke G L Gilliland J Orban L Wang Neil Spooner Enaksha Wickremsinhe Katherine Donegan

Physician data sourced from the NPPES NPI Registry . Publication data from PubMed . Plain-English summaries generated by AI. Not medical advice.