Meyahealth
HomeGeneticsGenePLAGL1 gene
Back to Gene
PLAGL1 gene
Reviewed by Medicinsk Expert•Last updated: 2026-10-22•Gene

PLAGL1 gene

The PLAGL1 gene provides instructions for making a zinc finger protein that regulates cell growth, fetal development, and insulin secretion.

Normal Function

The PLAGL1 gene provides instructions for making a member of a protein family called zinc finger proteins. These proteins are involved in many cellular functions and contain short regions called zinc finger domains, which include a specific pattern of amino acids and charged atoms of zinc. Zinc finger proteins primarily attach (bind) to DNA to regulate the activity of particular genes, acting as transcription factors. Some can also bind to RNA and other proteins.

The PLAGL1 protein helps regulate the cell cycle—the process of replicating cells in an organized fashion—and is involved in apoptosis (programmed cell death). It is also important in fetal growth. The protein helps control the pituitary adenylate cyclase-activating polypeptide receptor (PACAP1), which stimulates insulin secretion by beta cells in the pancreas. Insulin controls how much glucose is passed from the blood into cells for energy conversion.

PLAGL1 is a paternally expressed imprinted gene, meaning normally only the copy inherited from the father is active. The maternal copy is silenced by a mechanism called methylation.

Health Conditions Related to Genetic Changes

6q24-related transient neonatal diabetes mellitus

This type of diabetes in infants is caused by the overactivity (overexpression) of the PLAGL1 gene. Mechanisms include:

  • Paternal uniparental disomy (UPD) of chromosome 6: Inheriting both copies of the chromosome from the father, resulting in two active copies of the gene.
  • Duplication: The paternal copy of chromosome 6 contains a duplication of genetic material including the PLAGL1 gene.
  • Maternal hypomethylation: Impaired silencing of the maternal copy of the gene, which can be caused by genetic changes in the 6q24 region or generalized hypomethylation of imprinted loci (HIL).

Researchers suggest that PLAGL1 overexpression may reduce the number or function of insulin-secreting beta cells. A shortage of insulin leads to impaired blood glucose control and slow prenatal growth.

Cancers

Excessive silencing (hypermethylation) of the PLAGL1 gene has been identified in various tumors, including ovarian cancer and lymphomas. This leads to a shortage of the PLAGL1 protein, impairing its role in regulating the cell cycle and apoptosis, which may cause cells to divide uncontrollably.

Frequently Asked Questions

Newborns may develop high blood sugar within the first few days of life, presenting as poor feeding, vomiting, dehydration, or lethargy. Physical exam may reveal a small, thin baby with a low birth weight, and laboratory tests will show elevated glucose levels and low or normal C‑peptide, indicating insulin deficiency. Early detection is crucial because prompt insulin therapy can prevent serious complications.
The diagnosis is made by a combination of clinical presentation and genetic testing. A blood sample is sent for DNA analysis that looks for paternal uniparental disomy of chromosome 6, duplication of the 6q24 region, or hypomethylation of the maternal allele. Methylation‑specific PCR and array‑CGH are commonly used to detect these changes. A positive result confirms that the PLAGL1 gene is overactive.
Infants are started on insulin therapy as soon as hyperglycemia is identified. Most children respond well and can be weaned off insulin within 6 to 12 months, as the overexpression of PLAGL1 tends to normalize with age. Regular monitoring of blood glucose and growth parameters is essential during this period.
The recurrence risk depends on the underlying genetic mechanism. If the child inherited a duplication or paternal UPD, the risk for the next pregnancy is low but not zero; if the mutation is due to a de novo event, the risk is very low. Prenatal testing options include chorionic villus sampling or amniocentesis for methylation analysis of the 6q24 region, allowing early detection of abnormal PLAGL1 expression. Parents should discuss options with a genetic counselor.
Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.

Meyahealth

Ⓒ 2026. All rights reserved by MEYA

About UsTerms & PolicyFAQ