1
|
Fardelli E, D'Arco A, Lupi S, Billi D, Moeller R, Guidi MC. Spectroscopic evidence of the radioresistance of Chroococcidiopsis biosignatures: A combined Raman, FT-IR and THz-TDs spectroscopy study. Spectrochim Acta A Mol Biomol Spectrosc 2023; 288:122148. [PMID: 36462318 DOI: 10.1016/j.saa.2022.122148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 10/07/2022] [Accepted: 10/11/2022] [Indexed: 06/17/2023]
Abstract
In the last decades, Mars has been widely studied with on-site missions and observations, showing a planet that could have hosted life in the past. For this reason, the recent and future space missions on the red planet will search for traces of past and, possibly, present life. As a basis for these missions, Space Agencies, such as the European Space Agency, have conducted many experiments on living organisms, studying their behavior in extraterrestrial conditions, learning to recognize their biosignatures with techniques remotely controllable such as Raman spectroscopy. Among these organisms, the radioresistant cyanobacterium Chroococcidiopsis was irradiated during the STARLIFE campaign with strong radiative insults. In this article we have investigated this cyanobacterium using Raman spectroscopy and extended the characterization of its biosignatures and its response to the radiative stress to the mid- Infrared and Terahertz spectral region using the Fourier Transform InfraRed (FT-IR) and Terahertz Time Domain spectroscopy (THz- TDs), which demonstrates the compatibility and suitability of these techniques for future space missions.
Collapse
Affiliation(s)
- Elisa Fardelli
- University of Roma Tre, Department of Science, Viale G. Marconi, 446, Rome, 00146, Italy.
| | - Annalisa D'Arco
- University of La Sapienza, Department of Physics, P.le A. Moro, 5, Rome, 00185, Italy
| | - Stefano Lupi
- University of La Sapienza, Department of Physics, P.le A. Moro, 5, Rome, 00185, Italy; INFN - LNF, Via E. Fermi, 54, Frascati, 00044, Italy
| | - Daniela Billi
- University of Tor Vergata, Department of Biology, Via della ricerca scientifica, 1, Rome, 00133, Italy
| | - Ralf Moeller
- Institute of Aerospace Medicine, section Aerospace Microbiology, Linder Hohe, Cologne, 51147, Germany
| | | |
Collapse
|
2
|
Fardelli E, Lucidi M, Di Gioacchino M, Bashiri S, Persichetti L, Capecchi G, Gasperi T, Sodo A, Visca P, Capellini G. Bio-physical mechanisms of dehydrating membranes of Acinetobacter baumannii linked to drought-resistance. Biochim Biophys Acta Biomembr 2022; 1864:184045. [PMID: 36108779 DOI: 10.1016/j.bbamem.2022.184045] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 07/29/2022] [Accepted: 09/05/2022] [Indexed: 06/15/2023]
Abstract
Acinetobacter baumanni, is an opportunistic nosocomial multi-drug resistant bacterium, which represents a threat for human health. This pathogen is able to persist in intensive care units thanks to its extraordinary resistance towards dehydration, whose mechanisms are unknown and enable it to easily spread through surfaces, contaminating also medical devices. In this article we reveal, with a multimodal approach, based on μ-R Spectroscopy, Gas Chromatography coupled to Mass Spectroscopy, Atomic Force Microscopy and Fluorescence Recovery After Photobleaching, the bio-physical mechanisms that the membrane of two A. baumannii strains undergoes during dehydration. Showing a substantial decoupling of the phase transition from liquid crystalline to gel phase from evidence of cell lysis. Such decoupling may be the core of the resistance of A. baumannii against dehydration and highlights the different ability to resist to drought between strains.
Collapse
Affiliation(s)
- Elisa Fardelli
- University of Roma Tre, Department of Science, Viale G. Marconi, 446, Rome, 00146, Italy.
| | - Massimiliano Lucidi
- University of Roma Tre, Department of Science, Viale G. Marconi, 446, Rome, 00146, Italy
| | - Michael Di Gioacchino
- University of Roma Tre, Department of Science, Viale G. Marconi, 446, Rome, 00146, Italy
| | - Shadi Bashiri
- CNR, NEST, Istituto Nanoscienze, P.zza S. Silvestro, 12, Pisa, 56127, Italy
| | - Luca Persichetti
- University of Tor Vergata, Department of physics, Via della Ricerca Scientifica, 1, Rome, 00133, Italy
| | - Giulia Capecchi
- University of Roma Tre, Department of Science, Viale G. Marconi, 446, Rome, 00146, Italy
| | - Tecla Gasperi
- University of Roma Tre, Department of Science, Viale G. Marconi, 446, Rome, 00146, Italy; National Institute of Biostructures and Biosystems (INBB), Viale delle Medaglie d'Oro, 305, Rome, 00136, Italy
| | - Armida Sodo
- University of Roma Tre, Department of Science, Viale G. Marconi, 446, Rome, 00146, Italy
| | - Paolo Visca
- University of Roma Tre, Department of Science, Viale G. Marconi, 446, Rome, 00146, Italy; Santa Lucia Foundation IRCCS, Via Ardeatina, 306/354, Rome, 00179, Italy
| | - Giovanni Capellini
- University of Roma Tre, Department of Science, Viale G. Marconi, 446, Rome, 00146, Italy
| |
Collapse
|