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Type 1 Diabetes Mellitus

Autoimmune Beta-Cell Destruction — Insulin-Dependent Diabetes

Written by: Saygı Hospital Health Guide Editorial Board
Published:

This content is for general information; please consult your physician for diagnosis and treatment.

References (5)

This content is for informational purposes only and does not constitute medical advice. You can book an appointment at our Endokrinoloji department. Book Appointment →

What is Type 1 Diabetes Mellitus?

Type 1 diabetes results from T-cell mediated autoimmune destruction of pancreatic beta cells, leading to absolute insulin deficiency.

Diagnosis typically occurs in children, adolescents, and young adults, often presenting with hyperglycemia, polyuria, weight loss, or diabetic ketoacidosis.

Autoantibodies such as GAD-65, IA-2, ZnT8, and insulin autoantibodies support the diagnosis and distinguish it from type 2 diabetes.

Management requires lifelong exogenous insulin delivered via multiple daily injections or continuous subcutaneous insulin infusion (insulin pump).

Symptoms

Polyuria, polydipsia, and nocturia
Unintentional weight loss despite increased appetite
Fatigue, weakness, and poor exercise tolerance
Blurred vision from osmotic lens changes
Nausea, vomiting, abdominal pain, or Kussmaul breathing suggesting ketoacidosis
Recurrent skin or mucosal infections

Risk Factors

Genetic susceptibility (HLA-DR3/DR4 haplotypes)
Family history of type 1 diabetes or autoimmune diseases
Presence of islet autoantibodies
Coexisting autoimmune conditions (celiac disease, autoimmune thyroiditis)
Certain viral infections (enterovirus) as environmental triggers
Northern European ancestry and peak incidence between ages 4–14

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • New-onset hyperglycemia with polyuria, polydipsia, or weight loss
  • Symptoms of diabetic ketoacidosis: vomiting, abdominal pain, labored breathing, confusion
  • Recurrent severe hypoglycemia or inability to achieve glycemic targets

Treatment Methods

01
Basal-bolus insulin therapy with long-acting (glargine, degludec) and rapid-acting (lispro, aspart, glulisine) analogs
02
Insulin pump therapy and hybrid closed-loop systems for tighter glycemic control
03
Continuous glucose monitoring (CGM) to track time-in-range and detect hypoglycemia
04
Carbohydrate counting, medical nutrition therapy, and structured diabetes education
05
Annual screening for retinopathy, nephropathy (ACR, eGFR), neuropathy, and cardiovascular risk
06
Screening for coexisting autoimmune conditions: TSH, celiac antibodies; vaccinations and sick-day management plan

Which Department to Visit?

You can visit our Endokrinoloji department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.

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Let us help you

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.