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ACTH therapy in infantile spasms: relationship between dose of ACTH and initial effect or long-term prognosis
Insights
Adrenocorticotropic hormone (ACTH) dosage impacts infantile spasms treatment. Doses above 0.015 mg/kg/day are crucial for initial response, with specific ranges linked to better long-term mental development.
Area of Science:
- Pediatric Neurology
- Endocrinology
- Clinical Pharmacology
Background:
- Infantile spasms are a severe form of epilepsy in infants.
- Adrenocorticotropic hormone (ACTH) is a common treatment for infantile spasms.
- Optimal dosing strategies for ACTH in infantile spasms require further clarification.
Purpose of the Study:
- To investigate the relationship between ACTH dose and initial treatment response in infantile spasms.
- To examine the correlation between ACTH dosage and long-term prognosis, including seizure control and neurodevelopmental outcomes.
- To assess the impact of ACTH dose on the incidence of side effects.
Main Methods:
- Retrospective analysis of 41 children diagnosed with infantile spasms.
- Evaluation of ACTH dosage, seizure frequency, electroencephalographic (EEG) abnormalities, and neurodevelopmental assessments.
- Correlation of daily and total ACTH doses with treatment outcomes and adverse events.
Main Results:
- A minimum dose of 0.015 mg (0.6 IU)/kg/day of ACTH was necessary for a favorable initial response in seizures and EEG abnormalities.
- No significant correlation was found between daily or total ACTH dosage (above the minimum threshold) and long-term seizure or EEG outcomes.
- ACTH doses of 0.04-0.06 mg (1.6-2.4 IU)/kg/day and total doses of 1.1-1.5 mg (44-60 IU)/kg were associated with improved mental development.
- Increased ACTH dosage correlated with a higher incidence of side effects.
Conclusions:
- While higher ACTH doses may improve mental development in infantile spasms, careful consideration of side effects is essential.
- Finding the appropriate ACTH dose is critical, as both suboptimal and excessive doses may not lead to optimal neurodevelopmental outcomes.
- Individualized ACTH dosing strategies are recommended to balance efficacy and tolerability in managing infantile spasms.
Abstract:
The relationship between the dose of ACTH and the initial effect was investigated in 41 children with infantile spasms. More than 0.015 mg (0.6 IU)/kg/day of ACTH was needed for a good initial response of seizures and electroencephalographic abnormalities. The relationship between the dose of ACTH and long-term prognosis was investigated in 29 patients. There was no relationship between the daily or total ACTH dosage, provided the dose was greater than 0.015 mg (0.6 IU)/kg/day, and the outcome of seizures and electroencephalographic abnormalities; however, ACTH 0.04-0.06 mg (1.6-2.4 IU)/kg/day and a total ACTH dose of 1.1-1.5 mg (44-60 IU)/kg resulted in better mental development than smaller doses of ACTH. Side effects of ACTH increased with dosage. Too small or too large a dose of ACTH does not lead to better mental development. The proper dose of ACTH should be used with careful attention to potential side effects.