# Can One Letter in DNA Rewrite a Human Life? | Dr. Murtadha Ali | TEDxBaghdad Source: https://www.youtube.com/watch?v=VAk6VqAn2YM Recap page: https://rapidrecap.app/video/VAk6VqAn2YM Generated: 2026-02-10T17:36:10.935+00:00 --- ## Quick Overview Yes, a single letter change in DNA, specifically a Bi-Allelic DOCK8 c.850_851del variant, can rewrite a human life by causing a severe rare genetic disorder characterized by intellectual developmental disorder with muscle tone abnormalities and distal skeletal defects, as demonstrated by the Iraqi Genome Project's success in diagnosing previously unknown conditions. **Key Points:** - Approximately 300 million people worldwide are affected by rare diseases, 80% of which are genetic in origin, and 50% of affected patients are children. - The average time to diagnosis for a rare genetic disease is 5 to 8 years, a long and arduous journey for affected families. - The speaker's research focuses on identifying rare genetic mutations, such as the Bi-Allelic DOCK8 c.850_851del variant, which causes Intellectual developmental disorder with muscle tone abnormalities and distal skeletal defects. - The Iraqi Genome Project utilizes Next Generation Sequencing (NGS) to rapidly sequence genomes (48 persons in 2 days for $1000) to find pathogenic variants. - The discovery of the specific genetic error (like the DOCK8 variant) enables targeted therapy, such as Bone Marrow Transplant, providing hope for previously untreatable conditions. - The speaker contrasts the previous diagnostic journey (15 years, $3 million) with the current NGS capability, highlighting the drastic reduction in time and cost. - The success in diagnosing two families with unknown, severe genetic disorders demonstrates the potential for precision medicine in Iraq. ![Screenshot at 10:46: The slide titled 'Ending the Diagnostic Journey and treatment' displays the successful outcome of applying WGS to identify a 'Novel Bi-Allelic DOCK8 Variant,' leading to a diagnosis of 'Intellectual developmental disorder with muscle tone abnormalities and distal skeletal defects' and pointing toward Bone Marrow Transplant as a potential treatment.](https://ss.rapidrecap.app/screens/VAk6VqAn2YM/00-10-46.jpg) **Context:** Dr. Murtadha Ali presents at TEDxBaghdad about the critical challenges in diagnosing and treating rare genetic diseases, emphasizing that 80% of these conditions have a genetic origin and often manifest in children. He shares personal and collaborative research experiences from the Iraqi Genome Project, illustrating how rapid, whole-genome sequencing technology is overcoming the multi-year diagnostic odyssey faced by families searching for answers about their children's complex, unknown illnesses. ## Detailed Analysis Dr. Murtadha Ali opens by stating that 300 million people globally suffer from rare diseases, 80% stemming from genetics, with half being children. He highlights the typical 5-8 year diagnostic delay, which he calls a 'journey of suffering' for families. He contrasts the time and cost of initial genome sequencing (15 years, $3 million) with modern capabilities, noting that NGS allows sequencing 48 persons in 2 days for $1000. He details his research focus on bacterial genomes (like Streptococcus pneumoniae) before shifting to human genetics, explaining that DNA is composed of 3.2 billion base pairs (A, T, C, G). He then presents two case studies of families from Pakistan and Iraq, both with children exhibiting severe, undiagnosed symptoms like developmental delays, skeletal deformities, and facial dysmorphism. Through WGS, his team identified a novel Bi-Allelic DOCK8 c.850_851del variant in the first family, leading to a diagnosis. He underscores that this genetic diagnosis is crucial because it guides targeted treatment, such as Bone Marrow Transplant, offering hope where previously only management of symptoms existed. He emphasizes that this technology allows for faster, more accurate diagnosis at the root cause, enabling effective treatment plans for previously untreatable neurological and developmental disorders. ### The Scale of Rare Diseases - 300 million affected worldwide - 80% are genetic - 50% of patients are children - Average time to diagnosis is 5-8 years ### The Genetic Code - Human DNA has 3.2 billion base pairs (A, T, C, G) arranged in genes on 46 chromosomes - Bacterial DNA (S. pneumoniae) is much smaller (2.4 million bases) ### Case Study 1 (Pakistan) - Two siblings with global developmental delays, microcephaly, skeletal deformities, and facial dysmorphism, suffering for over 10 years with unknown diagnosis and high testing costs (> $10K). ### Case Study 2 (Iraq) - Two siblings with similar presentation including hypotonia and developmental delay, suffering for 10 years with unknown diagnosis and high costs (> $70K). ### The Solution - Next Generation Sequencing (NGS) allows sequencing 48 genomes in 2 days for $1000, enabling rapid diagnosis and moving research focus from complex bacteria to human genomics. ### The Breakthrough Diagnosis - For the Iraqi family, WGS identified a novel Bi-Allelic DOCK8 c.850_851del variant, leading to a diagnosis of Intellectual developmental disorder with muscle tone abnormalities and distal skeletal defects, paving the way for potential treatment like Bone Marrow Transplant. ![Screenshot at 00:24: Slide showing 300 Million people are affected worldwide by Rare Genetic Diseases.](https://ss.rapidrecap.app/screens/VAk6VqAn2YM/00-00-24.jpg) ![Screenshot at 00:46: Slide illustrating four different rare genetic syndromes affecting children and stating the average time-to-diagnosis is 5-8 years.](https://ss.rapidrecap.app/screens/VAk6VqAn2YM/00-00-46.jpg) ![Screenshot at 02:06: Diagram explaining the structure of DNA, chromosomes, nucleus, and cells, noting the human DNA code has about 3.2 billion bases.](https://ss.rapidrecap.app/screens/VAk6VqAn2YM/00-02-06.jpg) ![Screenshot at 03:29: Slide comparing the complexity of bacterial DNA \(2.4 million bases\) versus human DNA.](https://ss.rapidrecap.app/screens/VAk6VqAn2YM/00-03-29.jpg) ![Screenshot at 06:28: Slide detailing the 15-year, $3 billion cost associated with sequencing one human genome in 2001, contrasting it with modern speed \($1000 for 48 persons in 2 days\).](https://ss.rapidrecap.app/screens/VAk6VqAn2YM/00-06-28.jpg)