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Polyamides (PAs) or nylons are types of plastics with wide applications, but due to their accumulation in the environment, strategies for their deconstruction are of interest. Here, the authors screen 40 potential nylon-hydrolyzing enzymes (nylonases) using a mass spectrometry-based approach and identify a thermostabilized N-terminal nucleophile hydrolase as the most promising for further development, as well as crucial targets for progressing PA6 enzymatic depolymerization.

The fossil taxon Propotto was originally identified as a primate, but is currently widely interpreted as a bat. Here, the authors identify Propotto as a stem chiromyiform lemur and, based on phylogenetic analysis, suggest two independent lemur colonizations of Madagascar.

Net-zero bioplastics are possible when combined with high recycling rates. This study presents a mixed polyester recycling process integrated with monomer separation and purification for both fossil- and bio-based plastics. Techno-economic and life cycle analyses confirm its environmental and commercial advantages, advancing the path toward circular, low-emission polyester plastics.

The advantage of living in cities compared with rural areas with respect to height and BMI in children and adolescents has generally become smaller globally from 1990 to 2020, except in sub-Saharan Africa.

Lignin is an abundant source of renewable aromatic carbon and is of interest as a feedstock for sustainable fuels. This Review provides an overview of production technologies, jet fuel requirements, effects of lignin chemistry, depolymerization techniques, upgrading of bio-oils and challenges for catalysis using real biomass feedstocks.

The ratio of syringyl (S) and guaiacyl (G) units in lignin has been regarded as a major factor in determining the maximum monomer yield. Here, the authors challenge this common conception using reductive catalytic fractionation in flow-through reactors as an analytical tool to depolymerize lignin in poplar with naturally varying S/G ratios.

Statins, which have anti-inflammatory and antithrombotic properties, could have effects in COVID-19 patients. Here, the authors find in a retrospective analysis of patients hospitalized with COVID-19 that antecedent statin use is associated with lower inpatient mortality.

The appropriateness of percutaneous coronary intervention in the US has been examined from a large database of more than 500,000 procedures. The findings are surprising and, given their potential to be applied to quality-improvement initiatives, peer-review, and possibly reimbursement decisions, the proper interpretation of these results is essential.

Catheter-based revascularization has emerged as the gold-standard therapy for most patients with acute coronary syndromes (ACS). Optimizing outcomes in these patients requires appropriate adjunctive pharmacological therapy and percutaneous coronary intervention. Five studies published in 2013 are expected to have a major effect on treatment and prognosis of patients with ACS.

Arterial access is fundamental to contemporary interventional cardiology. In this Review, Rao and Stone compare the clinical evidence for femoral versus radial access, and how best to achieve haemostasis with each approach, including the use of manual compression and vascular closure devices.

In this Review, Stone and colleagues compare the outcomes after complete or incomplete revascularization with PCI or CABG surgery in patients with multivessel disease and stable ischaemic heart disease, NSTE-ACS or STEMI, with or without cardiogenic shock.

In this Review, the authors describe the features of coronary artery vulnerable plaques as well as non-invasive and invasive diagnostic modalities that can be used to characterize them. They also discuss the prognostic utility of identifying vulnerable plaques and the best current approaches to manage these lesions, and highlight evidence gaps and future directions.

A large number of acute coronary syndrome (ACS) events originate from plaques with an intact fibrous cap (IFC). In this Review, Kanwar et al. provide an overview of the latest advances in our understanding of plaque morphology in ACS with IFC, reviewing contemporary data from multimodality imaging. They also discuss whether the use of such imaging might result in more effective management of patients with ACS.

Contrary to the view that urbanization is a major driver of the global rise in obesity, the global increase in body-mass index is shown to be mostly due to increases in the body-mass indexes of rural populations.

The myocardial viability substudy from the STICH trial has reaffirmed the 10-year survival benefit of CABG surgery in patients with left ventricular dysfunction, but whether myocardial viability must be present for the long-term benefits of revascularization to be realized remains inconclusive.

In this Review, Khan and colleagues discuss the benefits and challenges of including pragmatism in the design, conduct and interpretation of randomized controlled trials (RCTs) for cardiovascular disease and highlight selected ongoing and completed cardiovascular RCTs that incorporate a pragmatic design.

In this Review, the authors address considerations for enteral antithrombotic therapy in patients with cardiovascular disease and gastrointestinal comorbidities, who often have an increased risk of gastrointestinal bleeding. Approaches include tailoring of antithrombotic regimens and gastrointestinal-protection strategies.

Optical coherence tomography (OCT) has been widely adopted in research on coronary atherosclerosis and adopted clinically to optimize percutaneous coronary intervention. In this Review, Jang and colleagues summarize this rapidly progressing field, with the aim of standardizing the use of OCT in coronary atherosclerosis.

In this Review, Serruys and colleagues describe the pathophysiology of unprotected left main coronary artery disease, discuss novel diagnostic approaches in light of new imaging techniques, and describe risk stratification models to help in the decision-making process for determining the best revascularization strategy in these patients.

Recent clinical observations have prompted clinicians to think of COVID-19 as being more than a respiratory disease.