Overview
Type 2 diabetes mellitus is one of the defining features of Alström Syndrome. By adulthood, nearly every person with Alström has developed it.¹ Diabetes in Alström behaves differently from typical adult-onset type 2 diabetes — it appears earlier, the insulin resistance is more severe, and it sometimes requires very high insulin doses. This article covers what's different about Alström-related T2DM, how it's monitored, and how families and adults manage it day-to-day.
What predicts and precedes diabetes
Children with Alström typically follow a recognizable progression:
1. Truncal obesity beginning in the first 1–3 years 2. Acanthosis nigricans (dark velvety skin patches in the neck, armpits, groin) signaling insulin resistance 3. Elevated fasting insulin with still-normal glucose 4. Impaired fasting glucose or impaired glucose tolerance 5. Type 2 diabetes
Recognizing this progression early allows preventive management before frank diabetes develops.
Symptoms of diabetes
In children and adults, signs of new or poorly-controlled diabetes include:
- Increased thirst (polydipsia)
- Increased urination (polyuria)
- Fatigue
- Unexplained weight loss
- Blurry vision (in addition to baseline vision changes)
- Slow-healing wounds
- Frequent infections
In Alström, the gradual onset can make these signs subtle. Routine screening is how diabetes is most often caught.
Screening and monitoring
The 2020 international consensus guidelines recommend regular metabolic screening:⁴
From childhood
- Fasting glucose annually
- HbA1c annually
- Fasting insulin (helps document insulin resistance)
- Fasting lipid panel annually
- Liver function tests (NAFLD is closely related)
When diabetes is established
- HbA1c every 3 months
- Lipid panel annually or as needed
- Kidney function (creatinine, microalbumin) annually
- Diabetic retinopathy screening (if any visual function remains)
- Foot exam (tactile sensitivity, vascular)
For people with Alström, "diabetic retinopathy" is complicated by the underlying retinal disease — assessment and interpretation often requires the retinal specialist familiar with the patient.
Treatment
Lifestyle (foundation)
- Family-friendly nutrition emphasizing whole foods and limiting refined carbohydrates
- Daily physical activity adapted for vision and cardiac status
- Weight management as feasible (Alström-related obesity is biologically driven, not a willpower question — see Childhood Obesity in Alström)
- Adequate sleep (sleep apnea worsens insulin resistance)
Medications
Metformin is typically first-line for both children and adults with Alström who have impaired fasting glucose or early diabetes. It addresses insulin resistance and has a strong safety profile.
Insulin is often needed as diabetes progresses. Many adults with Alström require:
- Multiple daily injections of long-acting and short-acting insulin
- Insulin pump therapy in some cases
- Very high doses, often 100+ units per day
GLP-1 agonists (semaglutide, dulaglutide, liraglutide) have shown benefits in Alström-related diabetes and obesity in some reports. They support weight management and blood sugar control with cardiovascular benefits.⁵
SGLT2 inhibitors (empagliflozin, dapagliflozin) provide glucose lowering plus heart and kidney protection — particularly valuable in Alström where heart and kidney involvement is common.
DPP-4 inhibitors (sitagliptin) are alternatives for some patients.
Pioglitazone (a thiazolidinedione) addresses insulin resistance directly but has side effects to consider.
Insulin pumps and continuous glucose monitors
Many adults with Alström use:
- Continuous glucose monitors (CGMs) — Dexcom, Libre, or others — provide real-time glucose data
- Insulin pumps — provide flexible dosing and basal/bolus management
- Closed-loop systems — increasingly available, automatically adjust insulin based on CGM data
- Talking glucose meters and accessible CGM apps for adults with vision loss
Practical day-to-day
Carb counting
Many adults and adolescents with Alström use carb counting to dose insulin. Apps with audio support work for those with vision loss.
Hypoglycemia awareness
Severe insulin resistance + high insulin doses = real risk of hypoglycemia. Glucose tablets or other fast carbs need to be readily available. CGM alarms help.
Sick-day management
Illness can dramatically affect insulin needs. Have a written sick-day plan from your endocrinologist.
Insulin storage
Insulin needs refrigeration when not in use; once opened, room-temperature for typically 28 days.
Diabetes in adolescents with Alström
Teen years often coincide with diabetes onset and worsening. Specific issues include:
- Hormonal changes affecting insulin requirements
- Adherence challenges during the period of identity formation
- Coordination with school nurses for medication administration
- Mental health support — diabetes increases mental-health risk in any teen
Teen-specific support and pediatric endocrinology with adolescent expertise help.
Diabetes in adults with vision loss
Specialized tools support self-management:
- Talking glucose meters — speak the result
- Audio-accessible CGM apps
- Insulin pens with click-counters for tactile dose verification
- Insulin pumps with audio menus
- Apps that count carbs by photo or audio
We cover this in Managing Diabetes When You're Blind.
Common questions
Frequently asked questions
Short answers grounded in the article and the underlying references, so families can quickly understand the main point without losing the medical meaning.
Question
Will my child definitely develop diabetes?
Answer
By adulthood, nearly all people with Alström have type 2 diabetes. The age of onset varies — some children develop it in single digits, others not until late teens or 20s. Lifestyle approaches and early metformin can delay onset.
Question
Why is the insulin resistance so severe?
Answer
ALMS1 protein appears to play a role in insulin signaling at the cellular level. When the protein doesn't work, cells respond poorly to insulin. The high insulin levels driving cellular responses elsewhere also contribute to features like acanthosis nigricans.
Question
Can my child still play sports?
Answer
Yes — exercise is beneficial for diabetes and important for cardiovascular health. Adapt for vision and cardiac status. Discuss with your endocrinologist about medication adjustments around exercise.
Question
Are there clinical trials for diabetes in Alström?
Answer
Some research is exploring specific pathways, including agents targeting the underlying ALMS1-related metabolic disturbances. Current trials primarily focus on standard diabetes management. We track research updates in Alström Research and Clinical Trials.