icon caret-left icon caret-right instagram pinterest linkedin facebook twitter goodreads question-circle facebook circle twitter circle linkedin circle instagram circle goodreads circle pinterest circle

Ricki Lewis

Genetic Linkage

Sequencing the Genomes of Dead People

October 16, 2015
Tags: DNA, bioethics, sequencing, human genome, ASHG
Last Wednesday, at “Career Night” during the American Society of Human Genetics annual conference in Baltimore, I was stationed next to Robert Steiner, MD, from the Marshfield Clinic Research Foundation in Wisconsin. With young scientists circling us like electrons around nuclei, I never got the chance to break away to talk to him. But I did overhear him discussing the Genomic Postmortem Research Project, an effort to sequence the genomes of 300 dead people.

I was fascinated.

Would knowing the information encoded in the DNA of the deceased have changed their health care? I went to the talk on the project the next day to find out about this clever test of the value of genome sequencing. Read More 
Be the first to comment

Precision Medicine: Much More Than Just Genetics

September 25, 2015
Tags: Precision Medicine Initiative Cohort Program
When President Obama uttered the words “Precision Medicine” in the state-of-the-union address, I scoffed at a politician’s finally noticing a field that’s been around for decades: medical genetics. Was it another case of rebranding, as chemistry has morphed into nanotech? But the definition of Precision Medicine that has emerged is, well, precise: “An approach to disease treatment and prevention that seeks to maximize effectiveness by taking into account individual variability in genes, environment, and lifestyle.” Read More 
6 Comments
Post a comment

Tess's Tale: Social Media Catalyzes Rare Disease Diagnosis

September 17, 2015
Tags: rare diseases, Baylor College of Medicine, Tess Bigelow, Undiagnosed Diseases Network, NORD
Tess Bigelow
Attention to the plight of families with rare diseases continues to grow this week, providing a backdrop to another compelling tale of a family seeking a diagnosis for mysterious symptoms.

THE UNDIAGNOSED DISEASES NETWORK
The National Human Genome Research Institute’s Undiagnosed Diseases Network (UDN) just announced the UDN Gateway. This online application portal will guide patients to a growing national network of clinical sites, including six new ones and two genome sequencing centers. The Gateway replaces paper-based application to specific clinical centers for the few coveted slots. Read More 
Be the first to comment

Targeting Cancer: A Basketful of Hope

September 14, 2015
Tags: cancer, precision medicine, basket study, José Baselga, melanoma, MATCH, BRAF, The Cancer Genome Atlas, Zelboraf
Basket studies allow researchers to evaluate considering a cancer's mutations in choosing treatment. (NHGRI)
Targeted treatments for cancer have been extending and saving lives for more than 15 years — precision medicine isn’t a new idea in oncology. Now drugs pioneered on select, specific cancers are, one by one, finding new applications.

The first wave of targeted drug approvals were for cancers associated with specific mutations. Herceptin (traztuzumab) led the way, approved in 1998. It’s a monoclonal antibody deployed against the HER2/neu receptor that is overabundant in some aggressive and early-onset breast cancers. Robert Bazell’s excellent book Her 2 tells the tale.

In 2001 came the blockbuster Gleevec (imatinib), a small molecule tyrosine kinase inhibitor that intercepts signals to divide. Erin Zammett’s My So-Called Normal Life with Cancer relates that story. A very young editor at Glamour magazine when a routine check-up revealed chronic myelogenous leukemia, Erin’s recovery was one of the first of thousands thanks to this now famous drug. Read More 
Be the first to comment

Disappearing Down Syndrome, Genetic Counseling, and Textbooks

August 13, 2015
Tags: Down syndrome, trisomy 21, genetic counseling, Art Caplan, Chloe's Law
Last week, several people sent me a perspective piece by bioethicist Art Caplan published in PLOS Biology, "Chloe’s Law: A Powerful Legislative Movement Challenging a Core Ethical Norm of Genetic Testing." The concise and compelling article considers legislation to mandate that genetic counselors talk to their patients more about positive aspects of having a child with trisomy 21 Down syndrome. Read More 
1 Comments
Post a comment

Gene Splicing in Lice and the Challenge of Clothing

August 6, 2015
Tags: lice, alternative splicing
A terrific article recently published in Molecular Biology and Evolution, “Alternative Splice in Alternative Lice,” provides a compelling example of maximizing genome information – adaptation of the louse Pediculus humanus to the new habitat created when our ancestors invented clothing.

HEAD VS BODY LICE
Many parents encounter head lice when their children are sent home from school with instructions to get rid of the horrible rice-krispie-like eggs (“nits”) clinging to their scalp hairs. A good washing won’t do it. Medication and clunky combs do very little alone. The sooner the poor parent realizes that meticulous nit-picking is the only solution, the sooner the nightmare ends.

But consider the louse’s point of view.

Lice live on us so that they can drink our blood, with a little help from bacteria that provide the B vitamins needed to extract maximal nutrients from their meals. Head lice lay their eggs on our hair shafts, gluing them in place. These are the much more common variety. They don’t carry disease, and are mostly an annoyance.  Read More 
Be the first to comment

“Saving Eliza” Campaign Helps Another Child

July 16, 2015
Tags: Sanfilippo syndrome, enzyme replacement therapy, gene therapy, Saving Eliza, MPS
5-year-old Will Byers got a spot in a clinical trial for his Sanfilippo syndrome thanks to the efforts of another family.
Valerie Byers had long suspected that her son Will’s diagnosis of autism was wrong. So when she saw a clip on the homepage of the Today Show about a little girl named Eliza, in late February, she knew instantly that five-year-old Will had something far worse.  Read More 
Be the first to comment

Hannah's Hair: Why Traits Matter

July 9, 2015
Tags: GAN, giant axonal neuropathy, gene therapy
Hannah Sames, age 7 (Dr. Wendy Josephs)
It’s a rarely acknowledged law of nature that whatever the texture of a little girl’s hair, she wants the opposite.

For years I wrapped my tangles around soup cans and around my head, squished it under irons, and subjected it to stinky straighteners. I’d often succeed, only to venture outside and have the hated curls spring up and out anew.

Eleven-year-old Hannah Sames also relaxes her curls. In fact, the pale kinks were the first thing Hannah’s parents, Lori and Matt, noticed when she was born. “Their other daughters, Madison, five, and Reagan, two, had stick-straight hair, as do Lori and Matt. When the birthing goop had dried, Hannah’s curls were odder still, weirdly dull, like the ‘before’ photograph in an ad for a hair conditioner,” I wrote in my gene therapy book. A more recent story about a little girl with curly hair but straight-haired siblings and parents in the Times of India is remarkably similar. Read More 
Be the first to comment

Aicardi Syndrome: Genome Sequencing Illuminates Another Rare Disease

July 1, 2015
Tags: Aicardi syndrome, genome sequencing, rare diseases
(NHGRI)
As the number of sequenced human genomes climbs and the time to sequence a genome plummets, I find myself drawn more to the small stories, the incremental revelations that may affect only a few individuals.

A few weeks ago, a study published in Investigative Ophthalmology and Visual Science caught my attention. Researchers at the Translational Genomics Research Institute (TGen) in Phoenix used exome and genome sequencing to probe the origins of a condition I'd never heard of -- and the findings were surprising. Read More 
Be the first to comment

When Celebrities Suddenly Care About Rare Diseases

June 17, 2015
Tags: Batten disease, Charlotte and Gwenyth Gray, Taylor's Tale, Laura King Edwards
Sharon King, Laura King Edwards, and Taylor King -- and Hannah Montana
I have followed, in awe, the tireless efforts of families that have rare genetic diseases to raise awareness and funds.

Bake sales and bike races, balls and raffles, exhausting and all-consuming. But these efforts pale when a performer or other famous rich person suddenly and explosively steps up to support such a disease, solely because someone they know has just been diagnosed. As if dozens of families haven’t already been trying to fund clinical trials for years. Last summer’s "ice bucket challenge" was the epitome of the power of viral social media, with the message about ALS lost in the excitement.

When celebrities suddenly care about rare diseases, I wonder what my friends in the rare disease community think. They’re happy, of course, at the attention, yet perhaps a bit unglued by the power of the famous – but maybe afraid to say so.

That happened recently for Batten disease, a devastating group of brain disorders that strike in childhood. One family isn’t afraid to speak out.

Two years ago my blog DNA Science gave a voice to Laura King Edwards, who has been running races in all 50 states in honor of her 16-year-old sister Taylor, who has Batten disease. Laura updated a year ago.

This year, she and her mother Sharon King share their thoughts about last week’s avalanche of concern for the disease that is taking Taylor away.  Read More 
1 Comments
Post a comment
Loading…}