Zinc Supplementation on Cellular Immunity in Thalassemia Major

University of Indonesia (UI)

Status and phase: Completed; Phase 4

Conditions: Thalassemia; Splenectomy; Status; Immunosuppression

Treatments: Drug: Zinc Sulfate; Drug: Sucrose Syrup

Study type: Interventional

Funder types: Other

Identifiers

NCT03117192

02

Details and patient eligibility

About

Randomized controlled trial was conducted in post-splenectomy patients aged >12 years. Subjects are randomly assigned to two groups (zinc and placebo). 1.5 mg/kg/day (max 50 mg/day) of Zinc is administered.

Full description

Thalassemia refers to a hereditary anaemic condition that occurs due to a single gene disorder resulting in a defect in globin production. Infection is an important cause of morbidity and mortality among thalassemia patients worldwide. Thalassemia patients are more prone to infection. Mechanism of this susceptibility is related to altered immune response compounded by splenectomy procedures common in patients with thalassemia. Zinc on the other hand plays important role in immune responses. This study aims to identify zinc supplementation to cellular immunity of splenectomized patients.

Randomized controlled trial was conducted in post-splenectomy patients aged >12 years. Subjects are randomly assigned to two groups (zinc and placebo). 1.5 mg/kg/day (max 50 mg/day) of Zinc is administered. Anamnesis, physical examination, and laboratory results such as peripheral blood, ferritin, transferrin saturation, serum zinc, immunologic markers for cellular immunity (lymphocyte count, CD4+ and CD8+ T lymphocyte count and functions) are evaluated at the start and end of the 12-week study.

Improvement in immune response is defined as an increase in the T lymphocyte count and CD4+ T lymphocyte count, decrease in CD8+, and increase in the CD4+/CD8+ ratio.12 The mean reference value for CD4+/CD8+ ratio is 1.4 (SD 0.6).15 CD4+ T lymphocyte function refers to its ability to synthesize IL-2 and TNF-α following exposure to 100 µL phytohaemagglutinin with proportions measured using flow cytometry. Meanwhile, CD8+ T lymphocyte function refers to its ability to synthesize IL-2 and TNF-α following exposure to 100 µL phytohaemagglutinin measured using flow cytometry.

The frequency of blood transfusion is calculated from the medical records of the subjects during the past 1 year, which is grouped as follows:

1. Seldom receive blood transfusions, if within a time period of one year the subject received blood transfusions of < 1 time.
2. Sometimes receive blood transfusions, if within a time period of one year the subject received blood transfusions of 2 - 3 times.
3. Often receive blood transfusions, if within a time period of one year the subject received blood transfusions of > 4 times.

Analysis was conducted using Statistical Package for Social Sciences (SPSS) version 20.0. Changes in immunologic parameters between the two groups that are numeric will be analysed using paired t-test for variables with a normal distribution, and Mann-Whitney test for numeric variables with non-normal distributions.

Enrollment: 58 patients

Sex: All

Ages: 12+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Thalassemia major patients
• Age > 12 years
• Agreed to participate and signed the informed consent
• No other comorbidity beside thalassemia

Exclusion criteria

• HIV positive patients
• Those in steroid medication

Trial design

Primary purpose: Prevention

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Triple Blind

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58 participants in 2 patient groups, including a placebo group

Zinc sulfate

Experimental group

Description:

Zinc sulfate is provided in the form of syrup at a dose of 1.5 mg/kg/day, maximum 50 mg/day.

Treatment:

Drug: Zinc Sulfate

Sucrose syrup

Placebo Comparator group

Description:

Sucrose syrup is used as placebo, its provided in the form of syrup with similar appearance and taste.

Treatment:

Drug: Sucrose Syrup