Air pollution, dysbiosis and diseases: pneumonia, asthma, COPD, lung cancer and irritable bowel syndrome.

With substantial effects on human health, air pollution has become a major global concern. Air pollution has been linked to numerous gastrointestinal and respiratory diseases with increasing mortalities. The gut and respiratory dysbiosis brought about by air pollution has recently received much attention. This review attempts to provide an overview of the types of air pollutants, their sources, their impact on the respiratory and gut dysbiotic patterns and their correlation with five major diseases including pneumonia, asthma, COPD, lung cancer and irritable bowel syndrome. Deeper insights into the links between pollutants, dysbiosis and disease may pave the way for novel diagnostic biomarkers for prognosis and early detection of these diseases, as well as ways to ease the disease burden.

Air pollution has become a major environmental concern because it can harm human health. Generally, air pollution is either classified as indoor or outdoor. Air pollutants are released from factories, automobiles, preparation of construction materials, agricultural practices, poultry and animal farming and even domestic tasks such as cooking. Air pollution can cause various illnesses of the gastrointestinal tract and lungs. These include cystic fibrosis, pneumonia, asthma, lung cancer, COPD and irritable bowel syndrome. These diseases are linked to disruptions of the community of bacteria in the lungs and gastrointestinal tract. This review looks at the impact of air pollution on microbial communities and associated diseases.

Restriction modification systems in archaea: A panoramic outlook.

Restriction modification (RM) systems are one of the ubiquitous yet primitive defense responses employed by bacteria and archaea with the primary role of safeguarding themselves against invading bacteriophages. Protection of the host occurs by the cleavage of the invading foreign DNA via restriction endonucleases with concomitant methylation of host DNA with the aid of a methyltransferase counterpart. RM systems have been extensively studied in bacteria, however, in the case of archaea there are limited reports of RM enzymes that are investigated to date owing to their inhospitable growth demands. This review aims to broaden the knowledge about what is known about the diversity of RM systems in archaea and encapsulate the current knowledge on restriction and modification enzymes characterized in archaea so far and the role of RM systems in the milieu of archaeal biology.