Biomedical Research

Research Article - Biomedical Research (2018) Volume 29, Issue 8

Alpha-1 antitrypsin (AAT) and C-reactive protein (CRP) in interstitial lungs diseases

Desh Deepak Singh*

Amity Institute of Biotechnology, Amity University Rajasthan, India

*Corresponding Author:
Desh Deepak Singh
Amity Institute of Biotechnology
Amity University, India

Accepted date: February 14, 2018

DOI: 10.4066/biomedicalresearch.29-17-3884

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Deficiency of Alpha-1 Antitrypsin deficiency (AAT) and higher CRP level are known biomarker for Lungs diseases. The purpose of this investigation was to estimate probable relations of AAT and CRP levels in the Lungs diseases. The sera of 27 patients of Emphysema, 20 patients with Chronic Obstructive Pulmonary Disease (COPD) and 17 patients of asthma along with 28 healthy volunteers were analysed. Age of patients and healthy volunteers was between 23 to 46 and male and female percentage was 71% and 29 % respectively. Serum AAT in asthma (0.401 ± 0.340), COPD (0.556 ± 0.310) and of emphysema (0.421 ± 0.311) is significant (P<0.001) lower than healthy control (1.01± 0.17). Serum CRP in asthma (3.930 ± 0.906), COPD (3.830 ± 0.666) and of emphysema (3.996 ± 1.049) is higher than healthy control (1.01 ± 0.17). Thus, serum AAT and CRP measurement can be helpful in predicting asthma control and treatment response.


Emphysema, Alpha 1-antitrypsin, COPD, Asthma, CRP


Lungs disease is a common and curable disease characterized by insistent airflow restriction that is regularly liberal and related with an enhanced chronic inflammatory response in the airways and the lungs to harmful particles or gases. Exacerbations and comorbidities pay to the overall severity in specific patients [1,2]. Lungs disease is presently the fourth leading cause of death and a substantial social burden throughout world, particularly in underdeveloped countries. AAT is reported to be associated with the rapidly progressive Lungs disease. The condition is characterized by predominantly lower zone emphysema, the presence of chronic bronchitis [1], and bronchiectasis [2]. The pathogenesis of these features is not conclusive but is thought to be a direct result of Lungs damage by neutrophil elastase and causes COPD and Lungs cancer [3]. The critically low level of AAT predicted to be present in the Lungs interstitial [4] and in the airway [5] greatly enhances the amount and area of activity of neutrophil elastase [6] and hence the degree of Lungs damage. The study undertaken here indicates that deficiency of alpha1- antitrypsin is also a factor to pulmonary infections.

Material and Methods

The study population consisted of 64 patients and 28 healthy volunteers. All the patients sample were obtained from the different hospitals of central India. All the patients had airflow obstruction with an FEV1<55% of predicted. Age group of patients was 23-46 y and male and female percentage was 71 and 29 respectively. After an appropriate physical examination like GOLD stage: I/II/IV, smokers, pulmonary symptoms, thorax High-Resolution Computed Tomography (HRCT) findings, any type of emphysema, FVC (Forced Vital Capacity), FEV1 (Forced Expiratory Volume in 1), % predicted, FEV1/FVC, TLC (Total Lungs Capacity), RV (Residual Volume), data on the symptoms of the patient was collected.

Blood samples were taken in serum tubes, clotted at normal room temperature for 35-65 min and centrifuged for 15 min at 4,000 rpm. Then, the samples were frozen at -70ºC for further analysis. The serum levels of AAT were determined by nephelometry using commercial kits (Dade Behring Marburg GmbH, Marburg, Germany) according to the manufacturer instructions. The analysis of C-reactive protein (CRP) was measured by chemiluminescent immunoassay. The levels of CRP were expressed in mg/L.

Quantitative variables were articulated as means with standard deviations. Variances of quantitative data were evaluated by the Kruskal-Wallis H-test. Associations between variables were determined by the Spearman correlation test. A p-value of less than 0.05 was measured statistically significant. Arithmetic examination was achieved using IBM SPSS Statistics for Windows, Version 20.0.


Out of 64 patients, 27 were found to be positive for emphysema, 20 patients for COPD and 17 patients positive for asthma. Age of patients and control was 23 to 46 and male and female ratio was 71% and 29% respectively, GOLD stage of I/II/IV was observed 4/10/50 respectively in total patients. History of smoking was found in 35 patients; ex-smokers were 16 and never-smokers were 13 patients. Pulmonary symptoms of patients were also recorded as dyspnoea in 32 patients, cough in 25 patients and chest pain was observed in 6 patients. Thorax High-Resolution Computed Tomography (HRCT) findings was observed in Saber sheath trachea with tracheal index<0.67 in 10 cases, thoracic cage ratio>0.75 at carina in 9 cases, thoracic cage ratio>0.75 at 5 cm below carina in 8 cases, sterno-aortic distance>4 cm in 7 cases, directly visible small airways in 8 cases, mosaic attenuation pattern in 5 cases, vascular distortion in 4 cases and thoracic cross-sectional area/ht2>cm2/m2 was observed in 13. Different types of emphysema observed in 27 cases such as paraseptal in 9 cases, panacinar in 6 cases and centriacinar type of emphysema in 11 and directly visible small airways was observed in 2 cases; mean of FVC was 100 ± 5, and FEV was 130 ± 5 observed. Mean of the ratio of FEV1 /FVC was investigated as 453 ± 3, mean of TLC was 700 ± 5 and at mean level of RV was found as 221 ± 15.

Serum AAT was observed in asthma (0.401 ± 0.340), COPD (0.556 ± 0.310) and of emphysema (0.421 ± 0.311) which was observed as significant (P<0.001) lower than healthy control (1.01 ± 0.17). Serum CRP level was investigated in asthma (3.930 ± 0.906), COPD (3.830 ± 0.666) and of emphysema (3.996 ± 1.049) which was found as significant (P<0.001) higher than healthy control (1.01 ± 0.17). Thus, serum AAT and CRP measurement can be helpful in predicting asthma control and treatment response.


This study showed the AAT and CRP value to compare with the severity of the Lungs diseases and scientific performance. These consequences are in support of the established fact that emphysema, COPD and asthma is a systemic inflammatory disease which primarily affects the Lungs. Comparable results were obtained in the studies which suggest that the reduced Lungs function in COPD, Asthma, emphysema is associated with increased levels of systemic inflammatory markers [7-12]. Statistically substantial association was found between the level of CRP and AAT. This result could be of excessive useful because it strength recommend that CRP and AAT level dependent predictors of systemic inflammation. Inflammatory response at the Lungs level to harmful agents causes systemic inflammatory changes and causes substantial extrapulmonary belongings that contribute to the increase of CRP and reduced to AAT.


The CRP level and AAT in lungs diseases exacerbation could be clinical marker for early diagnosis and patient’s treatment management.


Authors are highly gratefully to acknowledge Dr. Vinod Singh, Department of Microbiology, Barkatullah University, Bhopal-462026 and Cancer Hospital Gwalior, who has been planned and cooperated in sample collection and experimental work from central India, who has been died due to cancer on dated 26 September 2017. Authors also gratefully acknowledge to MLB Medical College Jhansi- India, Peoples Medical College Bhopal. Government Medical College Gwalior and Medical University, Lucknow, India, Medical College, Kanpur, India. Author tanksful to Prof. G. L. Sharma, Institute of Genomics and integrative Biology Mall Road Delhi University Campus-India and finally thankful to Institute of Biomedical Sciences Bundelkhand university Jhansi.