Talking Biotech with Dr. Kevin Folta

Specific chemistries are used to protect crops from insects, weeds, fungi and other microbes. Legacy issues with some older pesticides led to restrictions or bans on their use. Unfortunately, suspicion remains around contemporary solutions, even though today's chemistries are highly  specific, with low toxicity to non-target organisms, including humans. Use of crop protection compounds is critical to all agriculture, including organic production. However, activist groups continue to manufacture fear, uncertainty and doubt to override what we really know about the detection of these compounds in food and the relative toxicity at levels found. Dr. Liza Dunn is an emergency medical doctor and toxicologist.  For the last several years she has been working with the Bayer Corporation, and has been a leading important conversations about pesticides, residues, and their potential for impacts on human health. Follow her at @DrLizaMD

Epigenetic regulation of gene expression occurs via many mechanisms.  One method is the methylation of regulatory sequences that control the expression of specific genes. Methylation is the addition of a small methyl group to specific bases of the DNA helix. Addition of a methyl group can change how the DNA blueprint is accessed and expressed.  Today's guest is Prof. Asaf Hellman. His group has found relationships between the methylation state of DNA and expression of genes associated with diabetes and cancers. Understanding these patterns may help inform predisposition to disease, as well as eventually causal factors and drug targets.  

Recent reports criticized the lack of reproducibility in scientific publications, and this has profound effects on the public's trust in research results.  Today's interview is with Tim Errington, Director of Research at the Center for Open Science. The Center for Open Science has devised a series of strategies and tools that can help improve reproducibility, as well as offer collateral benefits to scientists. 

Proteins define the structure and function of cells. The human genome encodes tens of thousands of proteins, yet we know surprisingly little about most of their functions. The Human Protein Atlas uses labor-intensive methods to identify the tissue localization of a significant catalog of human proteins. The reasoning is that if we know where a protein is expressed, we can begin to infer roles in cellular processes. The Human Protein Atlas is an open source resource of over 15 million images that define where different proteins are located. This week's podcast discusses the Atlas with Dr. Mathias Uhlen of the University of Stockholm. We speak about the origins of the database, how the work is done, and potential applications of this incredible resource. 

Many diseases do not have cures, yet from deleterious mutations in the genome. Many of these are rare disorders that do not benefit from extensive research or drug development. Current therapies mask symptoms more than solve the basis of the disorder. Dietrich Stephan of NewBase describes a novel custom drug design platform that shows amazing potential in animal models. A small oligonucelotide with a specific backbone can bind to its complementary sequence in DNA or RNA, derailing RNA polymerase, or dissociating other regulatory proteins.  The design is highly specific and shows great promise against a myriad of disorders, including Myotonic Dystrophy, Huntington's Disease, and various cancers. This episode features a deep dive into molecular biology, so please do not hesitate to ask questions, it is interesting technology. 

We are bombarded by claims, and have access to the most information in human history, instantly.  How do we sort it out? What is real and what's not?  Who do we trust? These are major questions today, and affect everything from public health to the foundations of democracy in the USA.  From the news to the internet to the dinner table we are immersed in suspect information. How do we recognize and address conspiratorial thinking?  What mistakes do we make when analyzing a problem?  How can we recognize disinformation? Jon Guy has written a new book, Think Straight, that that addresses these questions perfectly, by providing a tool kit for dissection of information and claims. He covers a broad section of topics in what might be the most complete work on the subject of critical thinking and skepticism. Pre-Order on Amazon Here 

Mosquitoes are the world's most dangerous animals, vectoring dozens of diseases. One of the major disease vectors is Ades aegypti, an invasive insect with an ever-expanding range. Municipalities have turned to insecticides for control, which can impact beneficial insects. Sterile insect techniques, performed by mutagenizing mosquitoes to sterility, can work well in controlling insect populations. Over the last decade, Oxitec has advanced technologies that use a molecular techniques to repress development of mosquitoes in subsequent populations. Release of their genetically engineered males leads to decreasing populations of resident mosquitoes.  In this week's podcast we discuss the risks, benefits, and overall strategy, along with the company's public communications efforts, with the goal of increasing deployment of this technology when it can complement pubic health initiatives. 

Heart attack and stroke are leading causes of death worldwide. Current treatments are aimed at prevention-- using various medications to control the health of the circulatory system.  This week's podcast speaks with Dr. Oki O'Connor, Co-CEO of Underdog Pharmaceuticals. Dr. O'Connor discusses the cellular basis of atherosclerosis, and how modified cholesterol play a central role in its development.  We then discuss the ability of a cyclical carbohydrate called cyclodextrin to sequester cholesterol, and how this company has used computer modeling to modify cyclodextrins to limit and potentially reverse cardiovascular disease. There are also potential ramifications in Alzheimer's Disease prevention and treatment.  

Apples are a beloved fruit, with over 8000 varieties available worldwide. The apples in the grocery store represent just a tiny section of apple genetic potential, a few flavors that ship well and can be stored for a long period of time.  But today in the genomics era new tools seek to speed the breeding of apples to create new varieties, flavors, and disease resistance packages.  The goal is to help farmers and consumers produce the next generation of superior apple varieties.  With Dr. Awais Khan, apple breeder from Cornell University. 

The process of animal development is a complex coordination of different genes through time.  At least that's what we thought.  Dr. Michael Levin from Tufts University is forcing us to rethink these processes, with impacts in medicine, cancers, correction of developmental defects and limb regeneration. ,