Advanced biopreservation technologies using subzero approaches such as supercooling, partial freezing, and vitrification with reanimating techniques including nanoparticle infusion and laser rewarming are rapidly emerging as technologies with potential to radically disrupt biomedicine, research, aquaculture, and conservation. These technologies could pause biological time and facilitate large-scale banking of biomedical products including organs, tissues, and cell therapies.

Research on advanced biopreservation — technologies that include, for example, partial freezing, supercooling, and vitrification with nanoparticle infusion and laser rewarming — is proceeding at a rapid pace, potentially affecting many areas of medicine and the life sciences, food, agriculture, and environmental conservation. Given the breadth and depth of its medical, scientific, and corresponding social impacts, advanced biopreservation is poised to emerge as a disruptive technology with real benefits, but also ethical challenges and risks. Early engagement with potentially affected groups can help navigate possible societal barriers to adoption of this new technology and help ensure that emerging capabilities align with the needs, desires, and expectations of a broad range of interested parties.

In the evolving field of advanced biopreservation technologies, the development of suspended animation (SA) is inspired by real-world challenges. In the context of space exploration, SA is seen as a solution to enable humans to undertake missions far beyond low Earth orbit, including routine travel to other planets in our solar system and beyond. While work on the socio-ethical and legal implications (ELSI) of space exploration continues to evolve, NASA has committed to make ethics a priority issue, making this a fruitful field for further examination.

This exploratory study set out to pilot use of a Risk Innovation approach to support the development of advanced biopreservation technologies, and the societally beneficial development of advanced technologies more broadly. This is the first study to apply the Risk Innovation approach — which has previously been used to help individual organizations clarify areas of value and threats — to multiple entities involved in developing an emerging technology.

The development of technologies for the biopreservation of infectious organisms requires careful analysis of benefits and risks. This article reviews the regulatory landscape and oversight responsibilities in the United States in respect to pathogen biopreservation. Focused on two globally significant pathogens, Cryptosporidium and Plasmodium, the article explores advantages and potential risks of biopreservation concerning biosafety, biosecurity and biocontainment.

Bacteriocins produced by lactic acid bacteria are of great interest to the food-processing industry as natural preservatives. This work aimed to investigate the efficacy of bacteriocin-producing Lactobacillus plantarum TF711, isolated from artisanal Tenerife cheese, in controlling Clostridium sporogenes during cheese ripening. Cheeses were made from pasteurised milk artificially contaminated with 104 spores m/l C. sporogenes. Experimental cheeses were manufactured with Lb. plantarum TF711 added at 1% as adjunct to commercial starter culture. Cheeses made under the same conditions but without Lb. plantarum TF711 served as controls. Evolution of microbiological parameters, pH and NaCl content, as well as bacteriocin production was studied throughout 45 d of ripening. Addition of Lb. plantarum TF711 did not bring about any significant change in starter culture counts, NaCl content and pH, compared with control cheese. In contrast, clostridial spore count in experimental cheeses were significantly lower than in control cheeses from 7 d onwards, reaching a maximum reduction of 2·2 log units on day 21. Inhibition of clostridia found in experimental cheeses was mainly attributed to plantaricin activity, which in fact was recovered from these cheeses.

The current work studied four types of binary antagonist/pathogen bacterial culture system, in order to determine the effect of interaction between two strains of Lactobacillus plantarum and two food-borne pathogens, Listeria monocytogenes and Escherichia coli, in whole UHT milk at 37°C. To determine the type of interaction between the two bacterial populations in co-cultures and to evaluate the antagonistic activity of the lactic acid bacteria (LAB) on the pathogenic bacteria, the growth curves, the kinetic parameters, and the pH profiles of mono- and co-cultures were compared. The Lb. plantarum strains showed different bacteriocin-like inhibitory substance (BLIS) production, auto- and co-inducible. The antibacterial effect of neutralized supernatants of mono and co-cultures harvested at different times of incubation was assessed in order to establish the presence of bacteriocin-like inhibitory-substances (BLIS) and their possible relation to the growth inhibition of the pathogen. The LAB reduced the growth of Esch. coli and of List. monocytogenes by 4 and ∼5 log cycles, respectively and influenced other growth kinetic parameters, such as μmax and lag phase, in the different binary combinations. The growth of the LAB was not relevantly altered by simultaneous growth with the pathogenic strains showing an interaction of amensalism. The pattern of inhibition exerted by the LAB on the pathogens was different; Lb. plantarum LB279 inhibited the growth of List. monocytogenes more effectively than that of Esch. coli. The behaviour of Esch. coli in co-culture with Lb. plantarum WS4174 suggested the presence of metabolic crowding in the mechanism of growth suppression. This exploratory study showed the complexity and specific particularities of the inhibition phenomena between bacterial communities.