Evidence on the Link between Respiratory Syncytial Virus Infection in Early Life and Chronic Obstructive Lung Diseases

2020 ◽  
Vol 37 (S 02) ◽  
pp. S26-S30
Author(s):  
Eugenio Baraldi ◽  
Luca Bonadies ◽  
Paolo Manzoni
Keyword(s):  
Respiratory Syncytial Virus ◽  
Lung Function ◽  
Respiratory Tract ◽  
Early Life ◽  
Lower Respiratory Tract ◽  
Lung Diseases ◽  
Chronic Obstructive ◽  
Obstructive Lung Diseases ◽  
Syncytial Virus ◽  
Chronic Obstructive Lung Diseases

There is growing evidence in medical literature to support an association between early-life respiratory syncytial virus lower respiratory tract-lower respiratory tract infection (RSV-LRTI) and recurrent wheezing/asthma-like symptoms. It has been estimated that children with a history of RSV-LRTI have a 2- to 12-fold higher risk of developing asthma. The connection between RSV infection and a developmental trajectory of reduced lung function remains throughout adolescence and early adulthood, suggesting a possible role for RSV even in the inception of chronic obstructive pulmonary disease. That is why the postnatal period appears to offer a specific window of opportunity for early intervention to prevent chronic obstructive lung diseases. The mechanisms by which RSV contributes to the onset of wheezing/asthma and lung function impairment are not fully understood but appear to relate to injury caused directly by the virus and/or to pre-existing predisposing factors. While awaiting a deeper understanding of the association between RSV and chronic lung diseases, the crucial role of pediatricians and physicians is to develop strategies to prevent RSV infections to try and protect children's lifelong respiratory health. Key Points

Inspiratory Flow Rate and Dynamic Lung Function in Cystic Fibrosis and Chronic Obstructive Lung Diseases

CHEST Journal ◽  
1998 ◽  
Vol 114 (4) ◽  
pp. 988-992 ◽  
Author(s):  
Priscilla S.A. Sarinas ◽  
Terry E. Robinson ◽  
Andrew R. Clark ◽  
James Canfield ◽  
Rajinder K. Chitkara ◽  
...  
Keyword(s):  
Cystic Fibrosis ◽  
Lung Function ◽  
Flow Rate ◽  
Lung Diseases ◽  
Inspiratory Flow ◽  
Chronic Obstructive ◽  
Inspiratory Flow Rate ◽  
Obstructive Lung Diseases ◽  
Chronic Obstructive Lung Diseases

scholarly journals In SilicoApproach towards Designing Virtual Oligopeptides for HRSV

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Ruchi Jain ◽  
Shanmughavel Piramanayagam
Keyword(s):  
Respiratory Syncytial Virus ◽  
Respiratory Tract ◽  
Virus Replication ◽  
Lower Respiratory Tract ◽  
Specific Interaction ◽  
Infection Process ◽  
Rational Choices ◽  
Respiratory Tract Illness ◽  
Syncytial Virus ◽  
Infants And Young Children

HRSV (human respiratory syncytial virus) is a serious cause of lower respiratory tract illness in infants and young children. Designing inhibitors from the proteins involved in virus replication and infection process provides target for new therapeutic treatments. In the present study,in silicodocking was performed using motavizumab as a template to design motavizumab derived oligopeptides for developing novel anti-HRSV agents. Additional simulations were conducted to study the conformational propensities of the oligopeptides and confirmed the hypothesis that the designed oligopeptide is highly flexible and capable of assuming stable confirmation. Our study demonstrated the best specific interaction of GEKKLVEAPKS oligopeptide for glycoprotein strain A among various screened oligopeptides. Encouraged by the results, we expect that the proposed scheme will provide rational choices for antibody reengineering which is useful for systematically identifying the possible ways to improve efficacy of existing antibody drugs.

scholarly journals Effect of Zinc Salts on Respiratory Syncytial Virus Replication

2004 ◽  
Vol 48 (3) ◽  
pp. 783-790 ◽  
Author(s):  
Rahaman O. Suara ◽  
James E. Crowe
Keyword(s):  
Respiratory Syncytial Virus ◽  
Respiratory Tract ◽  
Zinc Acetate ◽  
Lower Respiratory Tract ◽  
Divalent Cations ◽  
Cell Monolayer ◽  
Inhibitory Effect ◽  
Plaque Formation ◽  
Zinc Salts ◽  
Syncytial Virus

ABSTRACT Zinc supplementation decreases the morbidity of lower respiratory tract infection in pediatric patients in the developing world. We sought to determine if zinc mediates a specific inhibitory effect against the major cause of pediatric lower respiratory tract disease, respiratory syncytial virus (RSV). We determined the in vitro inhibitory effect of three zinc salts (zinc acetate, lactate, and sulfate) on the replication of RSV at various concentrations of 10 and 1 mM and 100 and 10 μM. The degree of inhibition of RSV replication was examined in the presence of zinc during preincubation, adsorption, or penetration and was compared with that caused by salts of other divalent cations. Complete inhibition of RSV plaque formation was observed at 1 and 10 mM, representing reductions that were ≥106-fold. At the lowest concentration tested, 10 μM, we observed ≥1,000-fold reductions in RSV yield when zinc was present during preincubation, adsorption, penetration, or egress of virus. The therapeutic indices, determined as ratios of 50% toxicity concentration to 50% inhibitory concentration, were 100, 150, and 120 for zinc acetate, zinc lactate, and zinc sulfate, respectively. The inhibitory effect of zinc salts on RSV was concentration dependent and was not observed with other salts containing divalent cations such as calcium, magnesium, and manganese. RSV plaque formation was prevented by pretreatment of HEp-2 cell monolayer cultures with zinc or by addition of zinc to methylcellulose overlay media after infection. The results of this study suggest that zinc mediates antiviral activity on RSV by altering the ability of the cell to support RSV replication.

Reappraisal of respiratory syncytial virus as an aetiology of severe acute lower respiratory tract infections in children younger than 5 years in Nigeria

2019 ◽  
Vol 113 (8) ◽  
pp. 446-452
Author(s):  
Damilola M Oladele ◽  
Dimeji P Oladele ◽  
Rasheedat M Ibraheem ◽  
Mohammed B Abdulkadir ◽  
Rasaki Adewole Raheem ◽  
...  
Keyword(s):  
Respiratory Syncytial Virus ◽  
Respiratory Tract ◽  
Lower Respiratory Tract ◽  
Respiratory Tract Infections ◽  
Preventive Strategy ◽  
Lower Respiratory Tract Infections ◽  
Cross Sectional ◽  
Rsv Infection ◽  
Syncytial Virus ◽  
Tract Infections

Abstract Background Acute lower respiratory tract infections (ALRIs) especially severe ALRIs, constitute a global high burden of morbidity and mortality in children <5 y of age and respiratory syncytial virus (RSV) has been documented to a play a major aetiological role. However, Nigerian reports on severe childhood RSV ALRIs are rare and most reports are old. With recent advances in RSV preventive strategy, arises the need for a recent appraisal of RSV infection in children with severe ALRI. The current study thus set out to determine the prevalence of RSV infection among hospitalized children <5 y of age and describe the related social determinants. Methods We performed a descriptive cross-sectional study conducted over 1 y of 120 children, ages 2–59 months, diagnosed with ALRI. Relevant data were obtained and an antigen detection assay was used for viral studies. Results The prevalence of RSV infection was 34.2% and its peak was in the rainy months. The proportion of infants in the RSV-positive group was significantly higher than that in the RSV-negative group (82.9% vs 54.4%; p=0.002). These findings were largely consistent with those of earlier reports. Conclusions RSV has remained a common cause of severe ALRI in infants, especially during the rainy months in Nigeria. It is thus suggested that more effort be focused towards implementing the current global recommendations for the prevention of RSV-associated LRI, particularly in infants.

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