What is Alagille syndrome?

Alagille syndrome is a rare, multisystem disease that largely affects the liver. It can also affect other major parts of the body, including the heart, face, eyes, kidneys, and spine.

  • The liver and bile

    The liver performs important jobs: it helps clean the blood, stores energy, and makes a fluid called bile.

  • Bile has many purposes, including:

    Aiding in the digestion of fats and helping with the absorption of fat and certain types of vitamins (A, D, E, and K).

In people with Alagille syndrome, the bile ducts may be too narrow, too few, or missing altogether. This can result in cholestasis: a condition where the flow of bile from the liver is slowed or blocked, causing bile acids to build up in the body.

Here’s a closer look at how Alagille syndrome affects the liver:
Liver and intestines, with a number 1 showing bile acids and bile ducts, a number 2 showing bile acid spillover, and a number 3 showing IBAT. Liver and intestines, with a number 1 representing bile acids and bile ducts. Liver and intestines, with a number 2 representing bile acid spillover. Liver and intestines, with a number 3 representing IBAT.
1

People with Alagille syndrome have too few or malformed bile ducts, which prevents bile from flowing out of the liver.

2

When bile is not flowing out of the liver, bile acids—a part of bile—build up in the liver and the blood.

3

95% of bile acids made by the liver are recycled in the intestine through the ileal bile acid transporter (IBAT) and go back to the liver.

Over time, the buildup of bile acids in the liver can lead to long-term problems, including:

  • Inflammation in the liver
  • Liver damage that worsens over time
  • Scar tissue in the liver
  • Risk of transplant
High levels of bile acids are an underlying cause of cholestatic pruritus (itch) in Alagille syndrome
Up to88 %

of people with ALGS are affected by cholestatic pruritus, and it is considered the most burdensome symptom.

Cholestatic pruritus and its impact

Cholestatic pruritus is often a very challenging symptom for people with Alagille syndrome, beyond the scratching. It can be difficult to navigate the itch without the right support. Signs and symptoms related to the itch can look different during the day and/or night, vary among patients, or even change with age.

More than just scratching: the burden of cholestatic pruritus
  • 53% of people with Alagille syndrome report difficulty falling asleep due to cholestatic pruritus, while 59% report difficulties staying asleep.

    These sleep disturbances due to cholestatic pruritus are associated with fatigue.

Additional signs and symptoms related to cholestatic pruritus can include:
  • Burning, tingling, or
    prickling sensation
  • Irritability
  • Rubbing of the feet
  • Skin damage
  • Physical discomfort
  • Inability to focus
Flare-ups

Cholestatic pruritus may only happen occasionally or may get worse during certain times of the year. Some people refer to times when cholestatic pruritus is worse as “flare-ups.”

It can be easy to mistake

Cholestatic pruritus can be mistaken for other common causes of itch, such as:

  • Change of seasons
  • Skin conditions that may cause itch
  • Reactions to possible irritants, like laundry soap
  • Allergies
Cholestatic pruritus can have long-term effects

In the past, there were limited treatment options for cholestatic pruritus in Alagille syndrome. As a result, burdensome symptoms like the itch and the damage caused by bile acid buildup often led to surgery or liver transplant being used as treatment.

Persistent cholestatic pruritus was a reason in 49% and 82% of liver transplants in patients with Alagille syndrome.*

  • *A retrospective review assessing information of 163 children with Alagille syndrome and liver involvement between 1960 and 2000 found that among the 44 patients who received a liver transplant, refractory (persistent despite treatment) pruritus was a reason in 36 patients (82%); xanthomas (deposits of fat under the skin) that affect appearance were a reason in 32 patients (73%), bone fractures in 15 patients (34%); and/or signs of end-stage liver disease in 5 patients (11%).
  • A multicenter retrospective (looking back in time) study of 1433 children with Alagille syndrome assessed outcomes in 1184 of those children who presented with neonatal cholestasis. Among the 328 patients who received a liver transplant and had recorded reasons (some patients had more than 1 reason), intractable (persistent) pruritus was listed as a reason in 161 cases (49%). There were 235 cases of ≥1 complication of persistent cholestasis (72%); of these, growth failure was a reason in 127 cases (54%); xanthomas in 116 cases (49%); metabolic bone disease in 16 cases (7%); fat-soluble vitamin deficiency in 3 cases (1%).
Recognize the signs and symptoms related to cholestatic pruritus
  • Wiggling in infants, or restlessness
  • Rubbing eyes and ears
  • Irritability
  • Active scratching that can result in red marks and scarring
  • Sleep disturbances
  • Inability to focus
  • Physical discomfort
  • Normalizing or downplaying the itch
Video of Téa
“I categorized her itch as mild—it was just a part of our life at that point. I regret it because it wasn't normal. It was affecting her daily life.

—Michelle, mom to Téa, living with Alagille syndrome

Hear from Téa, who struggled for years with persistent itching and disrupted sleep.

Watch Téa's full story

Not all patients taking LIVMARLI and their caregivers will have the same experiences.

All levels of cholestatic pruritus deserve attention. Check out LIVMARLI.com/between-the-fines to hear real people open up about their lives with cholestatic pruritus.

Get insights into your itch

Take the itch quiz

The following questions can help you identify the signs and symptoms of cholestatic pruritus, the impact they have on your everyday life, and how well they're currently managed. No matter the outcome, be sure to share your quiz summary with your doctor.

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See what happens when relief takes root
Explore results of LIVMARLI in patients with cholestatic pruritus in Alagille syndrome.