biology

Kenneth Witwer

Kenneth Witwer is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Kenneth Witwer rather than just read about it. In short: Kenneth W. Witwer is an associate professor of molecular and comparative pathobiology and neurology at the Johns Hopkins University School of Medicine in Baltimore, Maryland, United States.

Key takeaways

Kenneth Witwer belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Kenneth Witwer to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Kenneth Witwer from memory before moving on to harder problems.

Reference excerpt

Kenneth W. Witwer is an associate professor of molecular and comparative pathobiology and neurology at the Johns Hopkins University School of Medicine in Baltimore, Maryland, United States. He is president of the International Society for Extracellular Vesicles (ISEV) and previously served as Secretary General and Executive Chair of Science and Meetings of the society. His laboratory studies extracellular vesicles (EVs), noncoding and extracellular RNA (exRNA), and enveloped viruses, including HIV and SARS-CoV-2. Witwer is the managing editor of the journal Cytotherapy and a member of the Richman Family Precision Medicine Center of Excellence in Alzheimer's Disease. He has advised the US Environmental Protection Agency and the US National Institutes of Health and is an associate editor of the Journal of Extracellular Vesicles.

Career and research Witwer's PhD dissertation research was on retroviruses and innate immune system responses to pathogens such as Visna virus and simian immunodeficiency virus (SIV) as models of human immunodeficiency virus (HIV) disease, specifically regulation of microRNAs, cytokines, and the promyelocytic leukemia protein (TRIM19). He then completed a postdoctoral research project on miRNAs as biomarkers of HIV disease. In 2011, Witwer joined the faculty at Johns Hopkins, and he assumed a tenure-track position in 2012. His primary appointment is in the Department of Molecular and Comparative Pathobiology. He has a secondary appointment in Neurology and Neurosurgery. He is a member of the Cellular and Molecular Medicine program and the Richman Family Precision Medicine Center of Excellence in Alzheimer's Disease at Johns Hopkins. The Witwer laboratory studies the roles of EVs, exRNA, and ncRNA in HIV disease of the central nervous system and in other neurodegenerative diseases, such as Alzheimer's and Parkinson's. Another focus of the group is on how inflammatory insults like cigarette smoking affect progression of disease. Beginning in 2013, Witwer examined the hypothesis that RNAs such as miRNAs in dietary substances could regulate endogenous genes in mammals. These studies led him and others to the conclusion that this type of regulation is unlikely to occur in normal physiology. He subsequently served on two Scientific Advisory Panels of the United States Environmental Protection Agency and addressed the European Food Safety Authority on related questions of environmental exposure to RNA.

Organization and editing Witwer chaired the organizing committee of the ISEV2015 annual meeting (Bethesda, United States). He has since filled several leadership roles with ISEV and become President of the society in 2024. Witwer has organized or co-organized workshops and other meetings on five continents. Responding in 2020 to the restrictions of the COVID-19 pandemic, Witwer converted a monthly journal club at Johns Hopkins into a weekly worldwide virtual event known as "Extracellular Vesicle Club." The club became an official ISEV feature in 2021. He is co-Chair with Paul Robbins of the 2022 Gordon Research Conference on EVs. Witwer is an associate editor of the Journal of Extracellular Vesicles and a member of the editorial boards of Clinical Chemistry and AIDS. He was instrumental in the founding of a second ISEV journal, the Journal of Extracellular Biology.

Scientific rigor, standardization, and advocacy Witwer has contributed to scientific standardization and rigor efforts. He was corresponding author in 2013 of the first position paper of the International Society for Extracellular Vesicles, on standardization of isolation and characterization of EVs in RNA studies. With Clotilde Théry, he coordinated the Minimal Information for Studies of Extracellular Vesicles (MISEV2018), a consensus guidelines document for the EV field. An opponent of AIDS denialism, a largely defunct movement that denied the existence of HIV or its role in causing AIDS, he has encouraged high standards in scientific publishing, critiquing predatory publishing and other publishing practices. He has advocated public availability of scientific data. With the emergence of COVID-19, Witwer was interviewed about the virology of the pandemic and conspiracy theories that arose around SARS-CoV-2. He is co-corresponding author of a statement by ISEV and the International Society for Gene and Cell Therapy on extracellular vesicle-based therapies for COVID-19.

Awards and honors 2003-2006 National Science Foundation Graduate Research Fellowship 2009 Richard T. Johnson Award, International Society for NeuroVirology 2014 CFAR Scholar Award, Johns Hopkins University Center for AIDS Research 2017 Catalyst Award, Johns Hopkins University 2021 Special Achievement Award of the International Society for Extracellular Vesicles

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with Kenneth Witwer

Start with the simplest possible case. Write down what Kenneth Witwer claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Kenneth Witwer before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Kenneth Witwer ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Kenneth Witwer

In research: Kenneth Witwer appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Kenneth Witwer in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Kenneth Witwer is common in secondary-school and first-year university syllabi. It links to neighbouring topics 21st-century American scientists, 21st-century biologists, American molecular biologists, so understanding it makes those chapters shorter.
In everyday life: Look for Kenneth Witwer outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Kenneth Witwer in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Kenneth Witwer means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Kenneth Witwer out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Kenneth Witwer in simple terms?

Kenneth W. Witwer is an associate professor of molecular and comparative pathobiology and neurology at the Johns Hopkins University School of Medicine in Baltimore, Maryland, United States.

Why does Kenneth Witwer matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Kenneth Witwer?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Kenneth Witwer.