scholarly journals Comparison of serum interleukin-33 levels in children with allergic respiratory diseases

2020 ◽  
Vol 73 (3-4) ◽  
pp. 88-93
Author(s):  
Borko Milanovic ◽  
Gordana Vijatov-Djuric ◽  
Mirjana Stojsic ◽  
Aleksandra Milutinovic ◽  
Jelena Stojcevic-Maletic
Keyword(s):  
Allergic Rhinitis ◽  
Allergic Asthma ◽  
Respiratory Diseases ◽  
Serum Levels ◽  
Asthma Severity ◽  
Control Group ◽  
Healthy Children ◽  
Interleukin 33 ◽  
Relationship Of ◽  
The Relationship

Introduction. Recent studies point to the importance of interleukin-33 in the pathogenesis of allergic respiratory diseases. The relationship of interleukin-33 and certain allergic respiratory diseases as well as their characteristics is not fully elucidated. The basic aim of this research was to determine interleukin-33 serum levels in children with allergic asthma and allergic rhinitis, as well as to examine the relationship between obtained interleukin-33 levels and individual clinical characteristics of these patients. Material and Methods. Serum interleukin- 33 levels were measured in a total of 91 children. The study group included 39 children with both allergic asthma and allergic rhinitis, and also 22 children with allergic asthma without allergic rhinitis. The control group included 30 healthy children. Results. Serum levels of interleukin-33 in children with both allergic asthma and allergic rhinitis were significantly higher compared to those in children with allergic asthma only (?2 = 7.01; p = 0.008; p < 0.01). Both groups of patients had significantly higher interleukin-33 serum levels compared to healthy children (?2 = 7.01; p = 0.008; p < 0.01). The correlation between serum interleukin-33 levels and allergic asthma severity was statistically significant (rs = 0.289; p = 0.024; p < 0.05). Conclusion. Serum levels of interleukin-33 were significantly higher in children with allergic respiratory diseases compared to healthy examinees. Significantly higher levels of serum interleukin-33 levels were found in children with both allergic asthma and allergic rhinitis, compared to children with allergic asthma only. Patients with higher interleukin- 33 serum levels also had a more severe type of allergic asthma.

scholarly journals Expression of proteins associated with airway fibrosis differs between children with allergic asthma and allergic rhinitis

2021 ◽  
Vol 35 ◽  
pp. 205873842199049
Author(s):  
Paulina Sobkowiak ◽  
Beata Narożna ◽  
Irena Wojsyk-Banaszak ◽  
Anna Bręborowicz ◽  
Aleksandra Szczepankiewicz
Keyword(s):  
Allergic Rhinitis ◽  
Allergic Asthma ◽  
Immunoglobulin E ◽  
Serum Levels ◽  
Paediatric Population ◽  
Control Group ◽  
Healthy Children ◽  
Positive Skin ◽  
Gm Csf ◽  
Lower Airways

Allergic rhinitis (AR) and allergic asthma (AA) exhibit similar inflammatory response in the airways. However, the remodelling is more extensive in the lower airways, suggesting that the inflammation itself is not sufficient for allergic phenotype. We aimed to analyse whether the expression of selected 27 inflammatory and fibrosis-related proteins may be altered in AR and AA in the paediatric population and whether the expression pattern is either similar (due to the inflammation) or disease-specific (due to the remodelling). We analysed 80 paediatric subjects: 39 with AA, 21 with AR and 20 healthy children. The diagnosis of AR and AA was based on clinical manifestation, lung function, positive skin prick tests and increased immunoglobulin E levels. Serum levels of selected inflammatory proteins were measured with custom Magnetic Luminex Assay. Statistical analysis was performed in Statistica v.13. CCL2/MCP1, GM-CSF, gp130 and periostin concentrations were significantly lower, whereas IL-5 levels were higher in AA compared to the control group. CD-40L, CHI3L1/YKL-40, EGF, GM-CSF and periostin levels were significantly decreased in patients with AR than in the control group. Comparison of AA and AR patients revealed significant changes in CHI3L1/YKL-40 ( P = 0.021), IL-5 ( P = 0.036), periostin ( P = 0.013) and VEGFα ( P = 0.046). Significantly altered proteins were good predictors to distinguish between AA and AR ( P < 0.001, OR 46.00, accuracy 88.57%). Our results suggest that the expression of four fibrotic proteins was significantly altered between AA and AR, suggesting possible differences in airway remodelling between upper and lower airways.

Plasma kisspeptin and ghrelin levels in puberty variant cases

2017 ◽  
Vol 30 (5) ◽  
Author(s):  
Erdal Kurnaz ◽  
Yaşar Şen ◽  
Süleyman Aydın
Keyword(s):  
Serum Levels ◽  
Control Group ◽  
Control Groups ◽  
Premature Thelarche ◽  
Premature Adrenarche ◽  
Significant Difference ◽  
And Gender ◽  
And Control ◽  
Relationship Of ◽  
The Relationship

AbstractBackground:The aim of this study was to determine the serum levels of kisspeptin and ghrelin (GAH), as well as the relationship of these two peptides with each other in premature thelarche (PT) and premature adrenarche (PA) cases and to investigate the possibility of using these peptides as markers in the differentiation of puberty disorders.Methods:A PT group aged 1–8 years (n = 40), a PA group aged 1–9 years (n = 23, female/male = 20/3) and control groups consistent with each of the previous groups in terms of age and gender were created for the study. Kisspeptin and ghrelin levels were measured with ELISA methods from blood samples drawn while fasting in the morning.Results:When the PT group was compared with the controls, the plasma kisspeptin levels of the cases were significantly higher than the control group (165.47 ± 15.45 pmol/L, 96.82 ± 12.33 pmol/L, p = 0.005, respectively). Kisspeptin levels in the PA group did not show a difference with the control group (121.36 ± 17.99 pmol/L, 95.52 ± 11.54 pmol/L, p = 0.249, respectively). No significant difference could be found when GAH levels in the PT and PA groups were compared with controls. No significant correlation was found between kisspeptin and GAH levels in the PT and PA groups.Conclusions:Our results indicate that kisspeptin plays an important role in the PT, but GAH is not associated with puberty disorders.

scholarly journals A Clinical Study of Relationship of Body Mass Index with Allergic Rhinitis

2016 ◽  
Vol 9 (1) ◽  
pp. 33-36
Author(s):  
SS Bist ◽  
Sanjeev Bhagat ◽  
Himanshu Kala
Keyword(s):  
Body Mass Index ◽  
Allergic Rhinitis ◽  
Clinical Study ◽  
Body Mass ◽  
Allergic Diseases ◽  
Control Group ◽  
Female Patients ◽  
Relationship Of ◽  
The Relationship ◽  
High Bmi

ABSTRACT Objectives Although the association between obesity and bronchial asthma (BA) has been gaining more attention, few studies have been conducted concerning the relationship between body mass index (BMI) and other allergic diseases. The purpose of this study is to determine the relationship between allergic rhinitis (AR) and BMI. Materials and methods This was a retrospective study. Two hundred and ten patients of AR (138 males and 72 females) and 424 healthy controls were included in the study. The BMI of patients and controls were calculated and correlated. Results The percentage of AR patients with a low BMI was 9.5%, whereas 57.6% had a normal BMI; 21% were preobese and 9.5% were obese. In the control group, 48.6% subjects had normal BMI range followed by preobese 21.2%, underweight 20.3%, and obese 9.9%. Among the overweight (preobese+ obese) category, the maximum number of subjects belonged to cases, i.e., 32.8% with an odds ratio (OR) of 0.95 (95% confidence interval (CI) 0.91-1.07). Thus, AR was not associated with high BMI. Among the underweight, the maximum number of subjects belonged to the control group, i.e., 20.3% with an OR of 2.13 (95% CI 1.24-3.68). Thus, AR had no relationship with lower BMI also. It was also observed that more of the female patients (18, 29.1, and 12.5% were underweight, preobese, and obese respectively) had deranged BMI than male patients (5.3, 20.2, and 7.9% were underweight, preobese, and obese respectively). A relative risk of 1.124 (95% CI 1.01-1.23) and 1.04 (95% CI 0.95-1.13) was present in female patients with low and high BMI respectively, which is statistically significant (p = 0.0008). Conclusion It was concluded that BMI was not associated with increased prevalence of AR. Among the underweight and overweight, AR was more common in females than in males. Thus, BMI had a significant association with AR among female patients. Overall, BMI had no significant association with AR. How to cite this article Kala H, Bhagat S, Varshney S, Bist SS. A Clinical Study of Relationship of Body Mass Index with Allergic Rhinitis. Clin Rhinol An Int J 2016;9(1):33-36.

scholarly journals Comparation between serum levels of interleukin-33 in children with allergic asthma before and after inhalatory corticosteroid treatment

2020 ◽  
Vol 148 (5-6) ◽  
pp. 304-309
Author(s):  
Borko Milanovic ◽  
Gordana Vijatov-Djuric ◽  
Jelena Stojcevic-Maletic ◽  
Vesna Stojanovic
Keyword(s):  
Allergic Asthma ◽  
Corticosteroid Treatment ◽  
Allergic Diseases ◽  
Serum Levels ◽  
Healthy Children ◽  
Interleukin 33 ◽  
Significant Difference ◽  
Before And After ◽  
Applied Dose ◽  
And Control

Introduction/Objective. Interleukin 33 (IL-33) has a very significant function in inflammatory and autoimmune mechanisms, but its significance in immunopathogenic mechanisms of different allergic diseases, including allergic asthma (AA), is becoming increasingly emphasized. The objective of the study was to investigate serum levels of IL-33 in children with AA before applying inhalation corticosteroid therapy (ICS Th) and six months after it, correlating the gathered values of IL-33 with some clinical traits of the patient. Methods. The serum value of IL-33 has been determined in 61 children with AA before starting treatment and six months after treatment with ICS Th, and this was repeated in 30 healthy children. Results. Values of IL-33 in serum are significantly higher in children with AA that have not been treated with ICS Th during six months (p = 0.00; p < 0.05), which is also the case when comparing with healthy children (p = 0.00; p < 0.05). Serum values of IL-33 in children with AA after six months of ICS Th and in healthy children do not show significant difference (p = 0.88; p > 0.05). The correlation between serum values of IL-33 before applying ICS Th and the severity, degree of AA control, and the applied dose of ICS Th is statistically significant and positive. Conclusion. IL-33 values in the serum are significantly higher in children with untreated AA in those with poorly controlled AA. Six-month treatment with ICS Th leads to significant reduction of IL-33 serum levels, whose values are in positive correlation with the severity and control of AA.

scholarly journals Investigation of circulating lncRNAs as potential biomarkers in chronic respiratory diseases

2020 ◽  
Vol 18 (1) ◽  
Author(s):  
Zsófia Gál ◽  
András Gézsi ◽  
Ágnes F. Semsei ◽  
Adrienne Nagy ◽  
Monika Sultész ◽  
...  
Keyword(s):  
Allergic Rhinitis ◽  
Allergic Asthma ◽  
Respiratory Diseases ◽  
Expression Level ◽  
Healthy Children ◽  
Healthy Controls ◽  
Replication Cohort ◽  
Discovery Cohort ◽  
Chronic Respiratory Diseases ◽  
The Mean

Abstract Background In the present study the blood expression level of inflammatory response and autoimmunity associated long non-coding RNAs (lncRNAs) were compared in patients with different chronic respiratory diseases and investigated whether they could be used as biomarkers in these diseases. Methods In the discovery cohort, the gene expression level of 84 lncRNAs were measured in the blood of 24 adult patients including healthy controls and patients with asthma and COPD. In the replication cohort the expression of 6 selected lncRNAs were measured in 163 subjects including healthy controls and adults with allergic rhinitis, asthma, COPD and children with asthma. It was evaluated whether these lncRNAs can be used as diagnostic biomarkers for any studied disease. With systems biology analysis the biological functions of the selected lncRNAs were predicted. Results In the discovery cohort, the mean expression of 27 lncRNAs showed nominally significant differences in at least one comparison. OIP5-AS1, HNRNPU, RP11-325K4.3, JPX, RP11-282O18.3, MZF1-AS1 were selected for measurement in the replication cohort. Three lncRNAs (HNRNPU, RP11-325K4.3, JPX) expressed significantly higher in healthy children than in adult controls. All the mean expression level of the 6 lncRNAs differed significantly between adult allergic rhinitis patients and controls. RP11-325K4.3, HNRNPU and OIP5-AS1 expressed higher in allergic asthma than in non-allergic asthma. COPD and asthma differed in the expression of RP11-325K4.3 from each other. In examining of the lncRNAs as biomarkers the weighted accuracy (WA) values were especially high in the comparison of healthy controls and patients with allergic rhinitis. OIP5-AS1 and JPX achieved 0.98 and 0.9 WA values, respectively, and the combination of the selected lncRNAs also resulted in a high performance (WA = 0.98). Altogether, OIP5-AS1 had the highest discriminative power in case of three out of six comparisons. Conclusion Differences were detected in the expression of circulating lncRNAs in chronic respiratory diseases. Some of these differences might be utilized as biomarkers and also suggest a possible role of these lncRNAs in the pathomechanism of these diseases. The lncRNAs and the associated pathways are potential therapeutic targets in these diseases, but naturally additional studies are needed for the confirmation of these results.

scholarly journals On the Relationship Between Serum Level of Interleukin-33 with Allergic Rhinitis and Its Severity in Children

2021 ◽  
Vol In Press (In Press) ◽  
Author(s):  
Marzieh Heidarzadeh Arani ◽  
Sara Nikafarin ◽  
Hamidreza Gilasi
Keyword(s):  
Allergic Rhinitis ◽  
Serum Level ◽  
Serum Levels ◽  
Study Data ◽  
High Serum ◽  
Th2 Cells ◽  
Control Group ◽  
Case Group ◽  
Interleukin 33 ◽  
Pediatric Clinic

Background: T helper type 2 (Th2) cells are critical cellular elements in allergic rhinitis. Interleukin-33 (IL-33) produces Th2-related cytokines and binds to the ST2 receptors. This is expressed strongly in mastocytes and discerningly in Th2 cells. Through Th2 cells, IL-33 may also have partly involved in immune responses. Objectives: This study aimed to measure the IL-33 serum levels in children suffering from allergic rhinitis and investigate its relationship with the disease. Methods: This case-control study was conducted on a population with the age range of 7-18 years, who referred to the Pediatric Clinic of the Shahid Beheshti Hospital in Kashan, Iran, in 2017. The study sample encompassed 57 patients with allergic rhinitis (case group) and 57 subjects with no allergic rhinitis (control group). The ELISA assay was used to measure the serum level of IL-33 in the case and control groups. Allergic rhinitis was diagnosed by a pediatric immunologist considering the patient’s history and the guidelines set out by the Allergic Rhinitis and its Impact on Asthma (ARIA). All study data were analyzed with SPSS software version 22. Results: There were significant differences between the two groups in terms of age (P = 0.001), gender (P = 0.0144), family history of atopy (P < 0.001), symptoms duration (P < 0.001), and comorbidities (e.g., atopic dermatitis and asthma) (P < 0.001). Furthermore, compared to the control group, the case group exhibited significantly higher IL-33 serum levels (P < 0.001). Conclusions: The high serum levels of IL-33 exhibited in patients with allergic rhinitis indicate its involvement in the pathogenesis of the concerned disease.

scholarly journals The Relationship Between Body-Mass Index, Central Obesity and Asthma in Children

2021 ◽  
Vol 19 (1) ◽  
pp. 24-31
Author(s):  
Arzu Ay ◽  
Hülya Ucaryılmaz ◽  
Ayca Emsen ◽  
Hasibe Artaç
Keyword(s):  
Body Mass Index ◽  
Allergic Asthma ◽  
Body Mass ◽  
Central Obesity ◽  
Asthma Severity ◽  
Control Group ◽  
Test Results ◽  
Waist To Hip Ratio ◽  
Function Test ◽  
The Relationship

Objective: We hypothesized that, compared with body mass index (BMI) alone, central obesity would provide added information regarding types of asthma (allergic, nonallergic) and asthma severity. Materials and Methods: A total of 150 children aged between 7-17 years with 50 allergic asthma, 50 nonallergic asthma and 50 controls were included in the study. Height, weight, waist and hip circumferences of the groups were measured. Waist-to-hip ratio and BMI were calculated. Pulmonary function test results were recorded. The relation between anthropometric measurements, asthma, atopy, obesity and each other was analyzed. Results: Obesity according to BMI was higher in the group with allergic asthma than nonallergic asthma and the control group (p: 0.014). A positive correlation was found between asthma and BMI percentile, BMI z score and waist-to-hip ratio (p: 0.002; 0.003; 0.040, respectively). Children with obesity according to waist circumference were more frequent in the groups with allergic and nonallergic asthma compared to the control group (p: 0.048). There was a significant relationship between asthma severity and central obesity (p: 0.048). FEV1 / FVC and FEF25-75 were lower in the asthmatic groups compared to the control group (p: 0.028; 0.012, respectively). Conclusion: This study showed that central obesity was associated with asthma and asthma severity, but not with atopy. More investigation is needed to clarify how central obesity in children affects the control of asthma and the response to asthma medication. Keywords: Childhood asthma, central obesity, waist-to-hip ratio, body mass index

ОЦЕНКА ЦИТОКИНОВОГО ПРОФИЛЯ СЫВОРОТКИ КРОВИ И СУБПОПУЛЯЦИЙ Т-ЛИМФОЦИТОВ У ДЕТЕЙ С АЛЛЕРГИЧЕСКИМИ ЗАБОЛЕВАНИЯМИ ОРГАНОВ ДЫХАНИЯ

2019 ◽  
pp. 52-60
Author(s):  
E.V. Prosekova ◽  
A.I. Turyanskaya ◽  
N.G. Plekhova ◽  
M.S. Dolgopolov ◽  
V.A. Sabynych
Keyword(s):  
Allergic Rhinitis ◽  
Bronchial Asthma ◽  
Allergic Inflammation ◽  
Allergic Diseases ◽  
Control Group ◽  
Healthy Children ◽  
Serum Cytokine ◽  
Immunological Parameters ◽  
Low Level ◽  
Level Of Significance

Расширение спектра изучаемых клонов Тхелперов определило более сложные иммунные механизмы реализации аллергического воспаления. Цель. Характеристика показателей и взаимосвязей цитокинового профиля сыворотки и субпопуляционного состава Тлимфоцитов периферической крови у детей с бронхиальной астмой и аллергическим ринитом. Материалы и методы. Проведено комплексное обследование 150 детей в возрасте 311 лет с верифицированным диагнозом бронхиальной астмы, аллергического ринита и 30 здоровых сверстников. Иммунологические параметры крови оценивали методом проточной цитометрии, концентрации интерлейкинов и IgE в сыворотке крови определяли методом твердофазного иммуноферментного анализа. При статистической обработке использовали программы Statistica 10 с критическим уровнем значимости р0,05. Результаты. У детей с аллергическими заболеваниями в сыворотке крови определены высокие уровни содержания интерлейкинов4, 8, 13, 17А, сопоставимый с показателями группы контроля уровень IL17F и низкое содержание IFNy. При бронхиальной астме и аллергическом рините у детей выявлено увеличение количества CD3CD8CD45RO, CD3CD8CD45RACD45RO Тлимфоцитов и CD3CD4 Тхелперов и повышение количество Th17 при снижении CD3CD4CD45RO клеток памяти. В группе здоровых детей популяция Th17 составляла 9,491,6, у детей с аллергическими заболеваниями количество данных клеток было значимо выше 14,50,77 (р0,001). Анализ сывороточного содержания цитокинов у детей с изолированным течением БА и в сочетании с аллергическим ринитом выявил разнонаправленные корреляции, отличающиеся по силе и направленности от таковых в группе здоровых детей. Заключение. У детей при изолированном течении бронхиальной астмы и в сочетании с аллергическим ринитом выявлены: сопоставимое с показателями здоровых детей количество CD3CD4 Тклеток, дисбаланс в субпопуляционном составе Тхелперов за счет преобладания Th2 и Th17, активация синтеза IL17A, IL4, IL8, IL13, низкий уровень сывороточного IFNy, изменения силы и направленности взаимосвязей цитокинового профиля и спектра субпопуляций Тлимфоцитов.Expansion of the range of examined Thelper clones has determined more complex immune mechanisms for the implementation of allergic inflammation. Objective. To characterize the parameters and relationships between the serum cytokine profile and Tlymphocyte subpopulation in peripheral blood of children with bronchial asthma and allergic rhinitis. Materials and methods. 150 children aged between 311 years old with bronchial asthma, and allergic rhinitis and 30 healthy volunteers were examined. Immunological parameters were assessed by flow cytometry, the concentration of serum interleukins and IgE were determined by means of enzymelinked immunosorbent assay. Statistical analysis was performed with Statistica 10 program with a critical level of significance p0.05. Results. High levels of interleukins 4, 8, 13, 17A were determined, IL7F level was not significantly different from that in control group and low level of IFNy was found in the serum of children with allergic diseases. The number of CD3CD8CD45RO, CD3CD8CD45RACD45RO Tlymphocytes, CD3CD4 Thelper cells and Th17 were increased and at the same time CD3CD4CD45RO memory cells were decreased In bronchial asthma and allergic rhinitis children. Number of Th17 cells in healthy children was 9.491.6, in allergic children it was significantly higher 14.50.77 (p0.001). Analyses of serum cytokine count in children with isolated BA and in association with allergic rhinitis revealed multidirectional correlations differing in strength and direction from those in the group of healthy children. Conclusion. In children with isolated bronchial asthma and associated with allergic rhinitis the following parameters were found: CD3CD4 Tcells count was comparable to that in healthy children, the imbalance of Thelper subpopulation: prevalence of Th2 and Th17, activation of IL17A, IL4, IL8, IL13 synthesis and low level of serum IFNy.

scholarly journals Assessment of the relationship of serum liver enzymes activity with general and abdominal obesity in an urban Bangladeshi population

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Nurshad Ali ◽  
Abu Hasan Sumon ◽  
Khandaker Atkia Fariha ◽  
Md Asaduzzaman ◽  
Rahanuma Raihanu Kathak ◽  
...  
Keyword(s):  
General Population ◽  
Abdominal Obesity ◽  
Liver Enzymes ◽  
Serum Levels ◽  
General Obesity ◽  
Enzymes Activity ◽  
Elevated Liver Enzymes ◽  
Bangladeshi Population ◽  
Relationship Of ◽  
The Relationship

AbstractObesity is a global health concern because of its increasing trend both in developed and developing countries. A limited number of studies have evaluated the association of liver enzymes with both general and abdominal obesity in the general population; data for the Bangladeshi population are not available yet. This study aimed to assess the relationship of serum liver enzymes activity with both general and abdominal obesity in Bangladeshi adults. In total, 540 blood samples were obtained from the participants (388 males and 152 females) and analyzed for serum levels of ALT, AST, GGT, and ALP using standard methods. General obesity was defined as body mass index (BMI) ≥ 27.5 kg/m2 and abdominal obesity was defined as waist circumference (WC) ≥ 90 cm in males and ≥ 80 cm in females. The relationship between liver enzymes and obesity was evaluated by multivariate logistic regression models. Overall, 58% of participants in the general obesity group and 55% of the participants in the abdominal obesity group had at least one or more elevated levels of liver enzymes. The prevalence of elevated liver enzymes was significantly higher in the obesity group compared to the normal BMI and WC groups (p < 0.05 for all cases). The mean level of serum ALT, AST and GGT were significantly higher in the obesity group than the normal BMI group (p < 0.05). In the WC groups, mean AST and GGT were significantly higher in the obesity group compared to the normal group (p < 0.05). In regression analysis, serum levels of ALT showed an independent and significant association with general obesity, whereas, serum GGT showed a significant association with both general and abdominal obesity. In conclusion, a high prevalence of elevated liver enzymes was observed among participants included in the present study. Of the four enzymes, serum GGT was independently associated with both general and abdominal obesity. Further studies are required to understand the complex relationship between liver enzymes and obesity in the general population.

How matrix metalloproteinase (MMP)-9 (rs3918242) polymorphism affects MMP-9 serum concentration and associates with autism spectrum disorders: A case-control study in Iranian population

2021 ◽  
pp. 1-7
Author(s):  
Javid Rezaei Lord ◽  
Farhad Mashayekhi ◽  
Zivar Salehi
Keyword(s):  
Serum Concentration ◽  
Matrix Metalloproteinase ◽  
Serum Levels ◽  
Autism Spectrum ◽  
Enzyme Linked Immunosorbent Assay ◽  
Mmp9 Expression ◽  
Relationship Of ◽  
The Relationship ◽  
Metalloproteinase 9 ◽  
Control Study

Abstract The aim of this project was to evaluate the relationship of matrix metalloproteinase-9 (MMP-9) genetic variation and its serum concentration with autism spectrum disorder (ASD). One hundred ASD and 120 controls were enrolled in this study. Genomic DNA was extracted from blood and MMP-9 polymorphism was determined by polymerase chain reaction restriction fragment length polymorphism and serum levels were measured by enzyme-linked immunosorbent assay. The frequencies of CC, CT, and TT genotypes were 72%, 26%, and 2% in controls and 31%, 57%, and 12% in ASD, respectively. The frequencies of C and T alleles in ASD were 59.5% and 40.5%, and controls were 86% and 14%, respectively. There is a significant increase in serum MMP-9 levels in ASD as compared to controls. We have also shown that TT genotype is significantly associated with increase serum MMP-9 levels in patients (TT, CT, and CC serum levels were 91.77 ± 10.53, 70.66 ± 7.21, and 38.66 ± 5.52 and in controls were 55.55 ± 11.39, 42.66 ± 7.85, and 30.55 ± 6.34 ng/ml, respectively). It is concluded that there is a significant association between rs3918242 MMP-9 polymorphism and its serum concentration with autism. We also suggest that TT genotype is associated with increased MMP9 expression and may be a risk factor for ASD.

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