The role of leptin in the respiratory system: an overview

Malli, Foteini; Papaioannou, Andriana Ι.; Gourgoulianis, Konstantinos; Daniil, Zoe

doi:10.1186/1465-9921-11-152

Cited by 126 publications

(120 citation statements)

References 165 publications

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“…We show that elevated leptin increases the odds of abnormal FEV 1 by more than twofold after adjustment for BMI. A role for this adipocyte-derived cytokine in impaired lung function is plausible because leptin has receptors in the lung and is increased in inflammation (41,47,48). The triglycerides and HDL mechanism underlying the association of leptin with lung function is poorly understood.…”

Section: Discussionmentioning

confidence: 99%

Metabolic Syndrome Biomarkers Predict Lung Function Impairment

Naveed

Weiden

Kwon

et al. 2012

Am J Respir Crit Care Med

113

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Rationale:Cross-sectional studies demonstrate an association between metabolic syndrome and impaired lung function. Objectives: To define if metabolic syndrome biomarkers are risk factors for loss of lung function after irritant exposure. Methods: A nested case-control study of Fire Department of New York personnel with normal pre-September 11th FEV 1 and who presented for subspecialty pulmonary evaluation before March 10, 2008. We correlated metabolic syndrome biomarkers obtained within 6 months of World Trade Center dust exposure with subsequent FEV 1 . FEV 1 at subspecialty pulmonary evaluation within 6.5 years defined disease status; cases had FEV 1 less than lower limit of normal, whereas control subjects had FEV 1 greater than or equal to lower limit of normal. Measurements and Main Results: Clinical data and serum sampled at the first monitoring examination within 6 months of September 11, 2001, assessed body mass index, heart rate, serum glucose, triglycerides and high-density lipoprotein (HDL), leptin, pancreatic polypeptide, and amylin. Cases and control subjects had significant differences in HDL less than 40 mg/dl with triglycerides greater than or equal to 150 mg/dl, heart rate greater than or equal to 66 bpm, and leptin greater than or equal to 10,300 pg/ml. Each increased the odds of abnormal FEV 1 at pulmonary evaluation by more than twofold, whereas amylin greater than or equal to 116 pg/ml decreased the odds by 84%, in a multibiomarker model adjusting for age, race, body mass index, and World Trade Center arrival time. This model had a sensitivity of 41%, a specificity of 86%, and a receiver operating characteristic area under the curve of 0.77. Conclusions: Abnormal triglycerides and HDL and elevated heart rate and leptin are independent risk factors of greater susceptibility to lung function impairment after September 11, 2001, whereas elevated amylin is protective. Metabolic biomarkers are predictors of lung disease, and may be useful for assessing risk of impaired lung function in response to particulate inhalation.

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Section: Discussionmentioning

confidence: 99%

Metabolic Syndrome Biomarkers Predict Lung Function Impairment

Naveed

Weiden

Kwon

et al. 2012

Am J Respir Crit Care Med

113

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“…The presence of the receptors itself indicates the lungs as the target organ for this hormone. 17 Resistin is a recently discovered 12.5 kDa adipokine belonging to a cysteine-rich secretory protein family. Resistin is expressed in human macrophages, bone marrow, spleen, mononuclear leucocytes and at low levels in adipose tissue.…”

Section: Introductionmentioning

confidence: 99%

Leptin and resistin in overweight patients with and without asthma

Muc

Todo-Bom

Mota-Pinto

et al. 2014

Allergologia et Immunopathologia

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Background: Excess body mass increases the risk of development of asthmatic symptoms and their severity and decreases the treatment effectiveness. One of the hypotheses explaining the link between the two diseases concerns the adipokines, hormones produced by adipose tissue with a proinflammatory character. The aim of this study was to compare the levels of the adipokines (leptin and resistin) between overweight asthmatic patients, asthmatic patients with normal weight and overweight patients without asthma. Methods: 80 peripheral blood samples were collected from patients and blood serum extracted. Three groups were selected: overweight asthmatic patients (BMI ≥ 25), overweight patients without asthma and asthmatic patients with normal weight (BMI < 25). Waist circumference of the patients was measured (cut-off points were 80 cm for women and over 94 cm for men) and a skin prick test performed. Comparison of adipokine concentration between the 3 groups was made and association between these concentrations and the measurements was performed. Results: Although the concentrations of both adipokines were slightly higher for overweight asthmatic patients compared to overweight healthy patients, these differences were not significant. A significant association was found between leptin concentration and both BMI (p < 0.01) and waist circumference (p < 0.01). A difference for this cytokine was also found between asthmatic and non-asthmatic female patients (p < 0.05). Conclusions: As expected overweight patients with BMI ≥ 25 and patients with increased waist circumference showed higher leptin levels. We suggest that the studied cytokines, with a stronger indication for leptin, can elicit asthmatic inflammation in obese phenotype of asthma that affects more frequently women.

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“…In addition to its primary effects on energy regulation, which it exerts by inhibiting food intake and increasing energy expenditure, leptin has been found to play a regulatory role within the immune system. (7) The regulatory capacity of leptin is associated not only with adaptive immunity but also with the innate system. (6) Leptin promotes the production of nitric oxide and pro-inflammatory cytokines in macrophages and monocytes.…”

Section: Introductionmentioning

confidence: 99%

The influence of leptin on Th1/Th2 balance in obese children with asthma

et al. 2013

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Objective: In individuals with asthma, obesity induces the production of leptin and is associated with disease severity. Our objective was to evaluate the levels of serum leptin and their effect on Th1/Th2 balance in obese and non-obese children with asthma, as well as to investigate the association between serum leptin levels and clinical outcomes. Methods: We evaluated 50 atopic children with physician-diagnosed moderate-to-severe persistent asthma and 20 controls. The children with asthma were divided into two groups, by body mass index percentile: obese (n = 25) and non-obese (n = 25). From all subjects, we collected peripheral blood samples in order to determine the levels of leptin, IFN-γ, and IL-4. Asthma severity was assessed by an asthma symptom score, and the results were correlated with the parameters studied. Results: Serum leptin levels were significantly higher in the obese asthma group than in the non-obese asthma group, as well as being significantly higher in the children with asthma than in the controls, whereas IFN-γ levels were significantly higher and IL-4 levels were significantly lower in the obese asthma group than in the non-obese asthma group. In addition, the obese asthma group showed higher asthma symptom scores and significantly lower FEV 1 (% of predicted) than did the non-obese asthma group. There was a significant positive correlation between leptin and IFN-γ levels only in the obese asthma group. Conclusions: Although leptin is involved in the pathogenesis of asthma in obese and non-obese children, its effect is more pronounced in the former. In the presence of high leptin levels, only obese children with asthma exhibited Th1 polarization, with higher IFN-γ levels and greater asthma severity.Keywords: Leptin; Asthma; Interferon-gamma; Interleukin-4. ResumoObjetivo: A obesidade induz a produção de leptina em asmáticos e está associada à gravidade da doença. Nosso objetivo foi avaliar os níveis de leptina sérica e seu efeito no equilíbrio Th1/Th2 em crianças asmáticas obesas e não obesas e investigar a associação desses níveis com desfechos clínicos. Métodos: O estudo envolveu 50 crianças atópicas com diagnóstico médico de asma persistente moderada a grave e 20 controles. Os asmáticos foram agrupados como obesos (n = 25) e não obesos (n = 25) de acordo com o percentil do índice de massa corpórea. Amostras de sangue periférico foram coletadas de todos os sujeitos, e os níveis de leptina, IFN-γ e IL-4 foram determinados. A gravidade da asma foi avaliada por um escore de sintomas de asma, e os resultados foram correlacionados com os parâmetros estudados. Resultados: Os níveis séricos de leptina foram significativamente maiores nos asmáticos obesos do que nos asmáticos não obesos, assim como nos asmáticos comparados aos controles, enquanto os níveis de IFN-γ foram significativamente maiores e os de IL-4 foram significativamente menores nos asmáticos obesos do que nos asmáticos não obesos. Os asmáticos obesos tiveram maiores escores de sintomas de asma e VEF 1 (% do previsto) si...

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The role of leptin in the respiratory system: an overview

Cited by 126 publications

References 165 publications

Metabolic Syndrome Biomarkers Predict Lung Function Impairment

Metabolic Syndrome Biomarkers Predict Lung Function Impairment

Leptin and resistin in overweight patients with and without asthma

The influence of leptin on Th1/Th2 balance in obese children with asthma

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