Hutchinson-Gilford progeria syndrome (HGPS)
medical conditions

Hutchinson-Gilford progeria syndrome (HGPS)

Explore the available health information, treatment context, and integrative evidence for Hutchinson-Gilford progeria syndrome (HGPS).

Background
  • Hutchinson-Gilford progeria syndrome (HGPS), also called progeria and premature aging syndrome, is an extremely rare genetic disorder that causes premature aging shortly after birth. Although patients with HGPS have normal intelligence and motor control skills, they have distinct physical features that make them appear older than they really are. This is because a random genetic mutation causes cells in their bodies to die earlier than normal.
  • Symptoms, such as slowed growth, hair loss, and loose, aged-looking skin, typically develop when the child is six months to two years old. In addition, children with HGPS typically develop a condition called atherosclerosis, which occurs when the walls of the arteries become thick and hard.
  • There are several different forms of progeria, but the classic and most common type is HGPS. This disorder was named after two physicians from England, Dr. Jonathan Hutchinson, who first described it in 1886, and Dr. Hastings Gilford, who first described it in 1897.
  • It is estimated that HGPS occurs in about one out of eight million births. However, some researchers believe the incidence might be closer to one out of four million births because many cases may be undiagnosed or misdiagnosed as other conditions, such as Werner's syndrome (a very rare, autosomal recessive disorder also characterized by premature aging). Only about 100 cases worldwide have been reported in the medical literature.
  • There is currently no cure for HGPS, and a person's prognosis is generally very poor. People with HGPS may live to be 7-30 years old. On average, most people die at age 13. About 90 percent of children with HGPS die from complications related to atherosclerosis.
Risk Factors and Causes
  • Race: Ninety-seven percent of people with Hutchinson-Gilford progeria syndrome (HGPS) are Caucasian.
  • Gender: Males are 1.5 times more likely to have HGPS than females. The reason for this remains unknown.
  • Genetic mutation: In 2003, researchers discovered that a mutation in the lamin A (LMNA) gene causes Hutchinson-Gilford progeria syndrome (HGPS). Normally, this gene provides the body with instructions on how to make proteins that hold the center of cells (called the nucleus) together. When this gene is mutated, one of these proteins, called lamin A, is not produced properly. As a result, the cells in the body are unstable and the nuclei become damaged over time. This makes the cells more likely to die prematurely and leads to symptoms of progeria. Cells in areas of the body that are frequently exposed to physical forces, either from inside or outside of the body (such as the cardiovascular and musculoskeletal systems), are particularly vulnerable to premature cell death.
  • Random occurrence:
    HGPS is not an inherited condition that is passed down from parents to their children. Instead, mutations in the LMNA gene randomly occur during the development of the sperm or egg. Therefore, people who have a child with progeria do not have an increased risk of having another child with the condition.
Signs and Symptoms
  • General: Symptoms of Hutchinson-Gilford progeria syndrome (HGPS) typically develop when the child is six months to two years old. During this time, the child grows much slower than children of the same age, in terms of height and weight.
  • Physical features: Children with HGPS also have distinct physical features, including a narrowed faced and beaked nose, which makes the child look older. Other symptoms typically include hair loss (including the eyebrows and eyelashes), hardening and tightening of the skin (called scleroderma), a disproportionately large head, loose skin that looks old and weathered, prominent veins in the scalp, small lower jaw, high-pitched voice, delayed shedding of baby teeth, abnormal tooth formation, stiff joints, hip dislocations, and loss of body fat and muscle (which leads to weight loss).
  • Motor and mental development: Motor development and mental development are unaffected by HGPS and remain normal throughout the person's life.
Diagnosis
  • Genetic testing: If Hutchinson-Gilford progeria syndrome (HGPS) is suspected (usually when the child is 6-24 months old), a genetic test may be performed to confirm a diagnosis. A sample of the patient's blood is taken and analyzed in a laboratory for a mutation in the lamin A (LMNA) gene.
  • Before genetic testing was available, doctors diagnosed the condition solely on the patient's physical symptoms. Therefore, genetic testing allows doctors to diagnose HGPS at an earlier age, before all of the characteristic symptoms are seen. Early diagnosis is important because prompt treatment and regular medical checkups help extend the child's lifespan.
Complications
  • General: People with Hutchinson-Gilford progeria syndrome (HGPS) may live to be 7-30 years old. On average, most people die at age 13. About 90 percent of children with HGPS die from complications related to atherosclerosis.
  • Atherosclerosis (hardening of the arteries): Children with HGPS typically develop a condition called atherosclerosis, which occurs when the walls of the arteries become hard and thick. Atherosclerosis may limit blood flow to the heart, brain, or other parts of the body. When vital organs do not receive enough blood, they can fail. For instance, if blood flow to the heart is blocked, it causes a heart attack. If blood flow to the brain is blocked, it causes a stroke. Most children with HGPS die from cardiovascular abnormalities, including congestive heart failure, heart attacks, and strokes.
  • Malnutrition: Malnutrition is another common complication of HGPS because some infants have difficulty feeding.
  • Osteoporosis: Patients with HGPS have an increased risk of developing progeria, a condition that causes the bones to become weak, brittle, and porous. As a result, children with progeria may have an increased risk of experiencing bone fractures than healthy children.
Treatment
  • General: There is currently no cure for Hutchinson-Gilford progeria syndrome (HGPS). Treatment may help reduce symptoms and help prolong a child's life. It is important that patients regularly visit their doctors, especially their cardiologists. These doctors can help patients manage serious cardiovascular complications, such as atherosclerosis.
  • Low-dose aspirin: A daily dose of aspirin may be recommended to help prevent heart attacks and stroke. Children should only take aspirin under the strict supervision of a healthcare professional because serious side effects may occur.
  • Physical therapy: Physical therapy may be beneficial for children with HGPS because they typically have low muscle tone and experience joint stiffness and hip problems. A variety of techniques, including exercises, stretches, traction, electrical stimulation, and massage, are used during physical therapy sessions. A therapist may also teach parents or caregivers how to exercise a baby's muscles.
  • High-calorie dietary supplements: High-calorie dietary supplements may be recommended to help prevent weight loss and ensure adequate nutrition. Supplements should be taken under the supervision of a healthcare professional. A pediatrician may also recommend a nutritionist to help ensure that the child is receiving the proper vitamins and minerals.
  • Feeding tube: Some infants with HGPS may have difficulty feeding due to physical abnormalities. In such cases, a feeding tube may be needed to ensure that the child receives proper nutrition.
  • Removal of baby teeth: A child's permanent teeth might start coming in before the baby teeth have fallen out. If this happens, a dentist usually removes the baby teeth in order to prevent complications, such as overcrowding.
  • New drugs: New drugs, called farnesyltransferase inhibitors (FTIs), which were originally developed to treat cancer, may help treat HGPS in the future. Early studies have produced promising results. In laboratory and animal studies, these drugs have effectively corrected cell defects that cause HGPS. Specifically, they have been shown to improve nuclear shape by preventing the abnormal protein from reaching the scaffolding of the cell nucleus. However, additional human studies are needed to determine if FTIs are safe and effective for people with HGPS.
Prevention
  • Currently, there is no known method of prevention for Hutchinson-Gilford progeria syndrome (HGPS). The condition occurs randomly during the development of the sperm or egg.
  • The condition is generally diagnosed in infants who are 6-24 months old. Early diagnosis of HGPS is important because prompt treatment and regular medical checkups help extend the child's lifespan
References
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  2. Hennekam RC. Hutchinson-Gilford progeria syndrome: review of the phenotype. Am J Med Genet A. 2006 Dec 1;140(23):2603-24.
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  3. Kieran MW, Gordon L, Kleinman M. New approaches to progeria. Pediatrics. 2007 Oct;120(4):834-41.
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  4. Meta M, Yang SH, Bergo MO, et al. Protein farnesyltransferase inhibitors and progeria. Trends Mol Med. 2006 Oct;12(10):480-7. Epub 2006 Aug 30.
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