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Fragile X: Unraveling Autism’s Secrets

Fragile X has been known for decades, but an explosion of new research, prodded along by advocacy groups like the National Fragile X Foundation and FRAXA, is yielding insights that have implications for understanding and treating autism–and perhaps a number of other conditions too. “Fragile X is leading the autism field in terms of new treatments,” says pediatrician Randi Hagerman, medical director of the MIND Institute. “We know the gene, we know a lot about the biology, and we know how to fix it. That’s pretty exciting!”

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 My Journey with Fragile X

Fragile X Syndrome (FXS) is a very complex disease, to put it mildly. Researchers have only been able to fully study it starting in 1991 thanks to the Human Genome Project. Fragile X is an inherited genetic condition caused by a mutation in a single gene on the X chromosome, hence the name. It is a fairly rare condition, affecting 1 in 4000 males and 1 in 6000 females. Around 1 in 259 women carry Fragile X and can pass it to their children. Approximately 1 in 800 men carry it and can pass it to their daughters. Fragile X Syndrome is the most common cause of inherited intellectual disabilities and one of the leading known cause of autism. (source Fraxa) The condition is insidious. It often passes through generations unknowingly, and carriers can be completely unaffected, showing no signs until they pass it to a child and the gene fully mutates. A diagnosis for the child can become a diagnosis for the carrier and previous generations: carriers are at risk to develop two related disorders: Primary Ovarian Insufficiency and Fragile X Associated Tremor/Ataxia Syndrome. Both have life-altering effects, including early menopause for women.

 The Future of Fragile X Syndrome: Promising Research & Hope

Fragile X syndrome (FXS) is the most common form of inherited intellectual disability, affecting about 1 in 7,000 males and 1 in 11,000 females worldwide. The disorder causes behavioral issues, physical abnormalities, and a range of other health problems. Currently, there’s no cure for FXS. However, interventions like speech therapy, special education, behavioral and physical...

 The Surprising Legacy of a Genetic Disorder

Research on fragile X syndrome shows that even people who don’t have the disease can be shaped by it in deeply personal ways

Articles of Interest

Back to blog An Insider's View - Living With Fragile X

Back in 2002 when my son was diagnosed with Fragile X Syndrome aged 4, I felt like I had been blasted at full force by a huge blow against the wall! It was devastating. We had already been through a rocky journey from his babyhood to age 4 as we were told he was ‘globally developmentally delayed’. Some phrases you never forget and that is one for me.

Creating Awareness for Fragile X Syndrome

Fragile X syndrome (FXS) is not a common disorder, but it should gain more awareness because of the significant impact it has on those who have the mutation and those who carry it. In a news segment, “Behind the Mystery,” geneticist Dr. Tamar Goldwaser discussed the signs of FXS and the next steps if you or your child are diagnosed with FXS or as a carrier of this disorder.

Exploring the Adult Life of Men and Women With Fragile X Syndrome: Results From a National Survey

Fragile X syndrome is a neurodevelopmental disorder characterized by an expansion to 200 or more repetitions of the CGG sequence of nucleotides composing the 5′ untranslated region of the FMR1 gene located on the X chromosome

Five Things You May Not Know about Fragile X Syndrome

Babies aren’t routinely tested for FXS, so families might not find out about FXS for a few years.

Fragile X held him back. An experimental drug is helping him break free

For 22 years, Jason Mazzola's life was defined by Fragile X, a genetic condition that often causes autism and intellectual disability. Jason, who is 24 now, needed constant supervision. He had disabling anxiety, and struggled to answer even simple questions. All that began to change when he started taking an experimental drug called zatolmilast in May of 2023.

Fragile X syndrome

Fragile X syndrome (FXS) is the leading inherited form of intellectual disability and autism spectrum disorder, and patients can present with severe behavioural alterations, including hyperactivity, impulsivity and anxiety, in addition to poor language development and seizures. FXS is a trinucleotide repeat disorder, in which >200 repeats of the CGG motif in FMR1 leads to silencing of the gene and the consequent loss of its product, fragile X mental retardation 1 protein (FMRP).

Fragile X syndrome often results from improperly processed genetic material – correctly cutting RNA offers a potential treatment

Fragile X syndrome is a genetic disorder caused by a mutation in a gene that lies at the tip of the X chromosome. It is linked to autism spectrum disorders. People with fragile X experience a range of symptoms that include cognitive impairment, developmental and speech delays and hyperactivity. They may also have some physical features such as large ears and foreheads, flabby muscles and poor coordination.

Fragile X syndrome: 80 years since its discovery

People with the condition, which is the leading cause of autism spectrum disorders, do not make FMRP, a protein that is essential to brain development.

Fragile X syndrome: causes, diagnosis, mechanisms, and therapeutics

Fragile X syndrome (FXS) is the most frequent form of inherited intellectual disability and is also linked to other neurologic and psychiatric disorders. FXS is caused by a triplet expansion that inhibits expression of the FMR1 gene; the gene product, FMRP, regulates mRNA metabolism in the brain and thus controls the expression of key molecules involved in receptor signaling and spine morphology.

Medicine: Tracing Fragile X Syndrome

Because the defective site is on the X chromosome, females (who are born with two Xs, one inherited from each parent) are less often affected by the syndrome; their normal X chromosome can mask the effects of the faulty one. But males, who have one X and one Y sex chromosome, have no such backup and are therefore more susceptible.

My sister has Fragile X syndrome. The barriers to an ordinary life are institutional

With the right support, people with learning disabilities and autism can enjoy the things most of us take for granted.

Scientists Uncover Trigger for Fragile X Syndrome

A new study led by Weill Cornell Medical College scientists shows that Fragile X syndrome occurs because of a mechanism that shuts off the gene associated with the disease. The findings, published today in Science, also show that a compound that blocks this silencing mechanism can prevent Fragile X syndrome – suggesting a similar therapy may be possible for 20 other diseases that range from intellectual disability to multisystem failure.

Sophia James: Life as a Sibling of Someone with Fragile X Syndrome

That’s the thing about loving someone with Fragile X, you learn to appreciate seemingly insignificant things at a much larger scale than you would have without them.

Resources

31 Shareable Fragile X Facts

Fragile X is complex, and it can be challenging to explain. That’s why we developed a set of facts you can use as talking points for Fragile X Awareness Month in July … and all year long!

Our Fragile X World

Our Fragile X World is a research community dedicated to gathering practical information about the experiences of individuals with fragile X syndrome and their families. We conduct studies and share findings in order to advance science, improve professional practice, and impact policy.

Fragile Mama

Our lives dramatically changed on February 19th, 2018 when our son, Conor, was diagnosed with Fragile X Syndrome. As I navigate through what this means for our family, I'll be sharing tidbits from our life, answering questions, and spreading awareness about Fragile X Syndrome — right here on Fragile Mama.

Fragile X Association of Australia

Fragile X Association of Australia was formed as a national organisation in 1989. We’re proud to support and serve the Fragile X community, offering information and education and providing a national voice on Fragile X. Our vision is that people living with Fragile X are connected, included, understood & empowered to live their best possible lives.

Fragile X Foundation of Canada

Our mission is lead by building expertise, fostering safe spaces for open conversations, and empowering knowledge sharing across all levels of the community.

Fragile X New Zealand

Fragile X New Zealand is a charitable organisation that supports individuals, parents, whanau and communities affected by Fragile X Syndrome and Fragile X-associated Disorders and raises awareness about this inherited genetic condition.

Fragile X Society

The Fragile X Society aims to improve the lives of those affected by Fragile X and associated conditions by providing information and continued support to families and professionals they work with. Working together with those affected, the Society supports an inclusive community of people who understand the specific needs of Fragile X.

FRAXA

FRAXA’s mission is to find effective treatments and ultimately a cure for Fragile X syndrome. We directly fund research grants and fellowships at top universities around the world. We partner with biomedical and pharmaceutical companies, large and small, to bridge the gap between research discoveries and actual treatments.

National Fragile X Foundation

The National Fragile X Foundation serves all those living with Fragile X with a focus on community, awareness, and research in the pursuit of treatments and a cure. Fragile X syndrome is the most common inherited intellectual and developmental disability.

National Institute of Child Health and Human Development

The genetic disorder Fragile X syndrome, which results from mutations in a gene on the X chromosome, is the most commonly inherited form of developmental and intellectual disability.

Our Fragile Xperience

oin us as we learn about raising a Fragile X child, celebrate his milestones and share our experiences in hopes to help others on this journey.

Think Fragile X Foundation

Think Fragile X Foundation is an independent not for profit organisation that aims to raise awareness of Fragile X Syndrome (‘FXS’) by informing the community about FXS and holding fundraising events. 100% of all profits from all fundraising events are then donated to charities who help support people who have FXS.

CDC

FXS can be diagnosed by testing a person's DNA from a blood test. A doctor or genetic counselor can order the test. Testing also can be done to find changes in the FMR1 gene that can lead to fragile X-associated disorders. A diagnosis of FXS can be helpful to the family because it can provide a reason for a child’s intellectual disabilities and behavior problems.

National Human Genome Research Institute

00:00 00:32 Fragile X syndrome is a genetic condition that affects a person’s development, in particular their ability to learn and their social behavior. The syndrome results from mutations in a gene on the X chromosome. Because males have only one copy of the X chromosome, they are more likely to show severe symptoms if they inherit the mutated gene compared to females (who have two copies of the X chromosome).

StatPearls

Fragile X syndrome (FXS), or Martin-Bell syndrome, is a non-Mendelian trinucleotide repeat disorder. FXS is the most prevalent inherited cause of mild-to-severe intellectual disability and the most common monogenic cause of autism spectrum disorder.

Stephen T. Warren National Fragile X Center

Promoting excellence in research, clinical care and education in fragile X-related disorders.