Related Experiment Video

Updated: Feb 3, 2026

Meta-Analysis of the Effectiveness and Safety of Shugan Jieyu Capsules for the Treatment of Insomnia

Meta-Analysis of the Effectiveness and Safety of Shugan Jieyu Capsules for the Treatment of Insomnia

Published on: February 17, 2023

Correlation between HLA-DQB1*06:02 and narcolepsy with and without cataplexy: approving a safe and sensitive genetic

C Capittini¹, A De Silvestri¹, M Terzaghi²

¹Clinical Epidemiology and Biometric Unit, IRCCS Policlinico S. Matteo Foundation, viale Golgi 19, 27100, Pavia, Italy.

|October 16, 2018

Abstract

Study Objectives:

we performed a meta-analysis to assess the usefulness of HLA testing for Narcolepsy diagnosis in four major ethnical groups: Asians, Afro-Americans, Amerindians and Caucasians.

Methods:

PubMed, EMBASE, Web of Science, Scopus and Cochrane databases were searched for articles in English and French published before October 2017 on HLA class II alleles in Narcolepsy. We included case-control studies, cross-sectional and retrospective cohort studies with patients diagnosed following the International classifications of sleep disorders (1990-2012) and ethnically matched controls. Following PRISMA guidelines, two investigators independently extracted data according to the inclusion criteria listed in PROSPERO CRD42017058677. A third researcher was consulted for discrepancies. We extracted and pooled adjusted OR using random-effect models. We verified the strength of the association between HLA-DQB1*06:02 and the worldwide distribution of Narcolepsy type 1 (NT1) and type 2 (NT2); furthermore, we pooled the OR measuring the association between HLA-DQB1*06:02 and NT1, NT2 and hypersomniacs.

Results:

We identified 511 titles. Of these, 12 case-control studies were included, for a total of 2077 NT1 patients, 235 NT2 patients, 161 hypersomniacs and 7802 controls. In the population-stratified analysis, HLA-DQB1*06:02 conferred an increased risk for NT1 (OR: 24.1, IC: 14.6-39.5, p < 0.001) and NT2 (OR: 3.9; IC: 2.2-6.8, p < 0.001). For NT1 the pooled estimated positive Likelihood Ratio (LR+) was 5.94 (IC: 3.71-9.51) and the negative Likelihood Ratio (LR-) was 0.23 (IC: 0.16-0.33); for NT2 LR+ was 3.35 (IC: 2.08-5.38) and LR- 0.72 (IC: 0.63-0.81). Moreover, for hypersomniacs LR+ was 1.436 (IC 0.668-3.089) and LR- 0.903 (IC 0.714-1.142).

Conclusions:

Our data support the preponderant role of HLA-DQB1*06:02 in susceptibility to NT1/NT2 across all ethnicities. HLA-DQB1*06:02 negativity should make clinicians cautious in excluding other diagnoses.

Keywords:

Autoimmunity Cataplexy DQB1*06:02 Human Leukocyte Antigens Narcolepsy

More Related Videos

Personalized Peptide Arrays for Detection of HLA Alloantibodies in Organ Transplantation

Personalized Peptide Arrays for Detection of HLA Alloantibodies in Organ Transplantation

Published on: September 6, 2017

Author Spotlight: Evaluating the Adjuvant Efficacy and Safety of Angong Niuhuang Pill in Viral Encephalitis Treatment

Author Spotlight: Evaluating the Adjuvant Efficacy and Safety of Angong Niuhuang Pill in Viral Encephalitis Treatment

Published on: April 19, 2024

Related Concept Videos

Narcolepsy

Narcolepsy

Narcolepsy is a chronic sleep disorder characterized by pervasive, uncontrolled sleepiness and other sleep disturbances. One of its hallmark symptoms is an abrupt transition to REM sleep upon falling asleep, which causes symptoms typically associated with this phase to occur unexpectedly during wakefulness. These include the following symptoms, which typically last from a minute or two to half an hour.

FDA Approved Drugs: Changes to Approved Drugs

FDA Approved Drugs: Changes to Approved Drugs

Post-approval, manufacturers may modify an approved new or generic drug product. Such modifications can encompass alterations in the Active Pharmaceutical Ingredient (API), manufacturing process, formulation, batch size, manufacturing site, and container closure system (FDA Guidance for Industry, April 2004). Often, a drug product may undergo multiple changes.These modifications require careful evaluation to determine their potential impact on the drug product's identity, strength, quality,...

Correlations

Correlations

Correlation means that there is a relationship between two or more variables (such as ice cream consumption and crime), but this relationship does not necessarily imply cause and effect. When two variables are correlated, it simply means that as one variable changes, so does the other. We can measure correlation by calculating a statistic known as a correlation coefficient. A correlation coefficient is a number from -1 to +1 that indicates the strength and direction of the relationship between...

Ethnic Identity within a Larger Culture

Ethnic Identity within a Larger Culture

Adolescents from ethnic minority backgrounds face a multifaceted journey in forming their identities, shaped by the intersections of cultural expectations and personal exploration. For these adolescents, identity formation involves not only typical developmental challenges but also navigating the perceptions and attitudes of the majority culture. As they grow, adolescents in ethnic minority groups often become increasingly aware of stereotypes, social biases, and discrimination, all of which...

Correlation and Causation

Correlation and Causation

Statistical tests can calculate whether there is a relationship, or correlation, between independent and dependent variables. An indirect relationship of the variables signifies a correlation, while a direct relationship shows causation. If it is determined that no connection exists between the variables, then the correlation is a coincidence.
Correlation versus Causation
If the dependent variable increases or decreases when the independent variable increases, there is a positive or negative...

Correlation

Correlation

In statistics, two variables are said to be correlated if the values of one variable are associated with the other variable. Depending on the relationship between two variables, correlation can be of three types– positive correlation, negative correlation, and zero correlation.
Two variables, for example, a and b, are said to be positively correlated if both variables move in the same direction. In other words, a positive correlation exists between two variables, a and b, if:

Articles linked to this work by shared authors, journal, and citation graph.

Particle Beam Re-irradiation in Oligo Recurrent Gynecological Malignancies.

Clinical oncology (Royal College of Radiologists (Great Britain))·2026

Complications of unintentional dural puncture during labour epidural analgesia: a 10-year retrospective observational study.

Journal of anesthesia, analgesia and critical care·2023

Thyroid function, sensitivity to thyroid hormones, and metabolic syndrome in euthyroid children and adolescents with Down syndrome.

Journal of endocrinological investigation·2023

Impact of individual molecular components in determining primary sensitization to latex.

Immunobiology·2023

Factors associated with treatment escalation among MS specialists and general neurologists: Results from an International cojoint study.

Multiple sclerosis and related disorders·2022

SARS-CoV-2 mRNA vaccine BNT162b2 triggers a consistent cross-variant humoral and cellular response.

Emerging microbes & infections·2021

See all related articles