Interaction of Acinetobacter baumannii with Human Serum Albumin: Does the Host Determine the Outcome?
Acinetobacter baumannii has become a serious threat to human health due to its extreme antibiotic resistance, environmental persistence, and capacity to survive within the host. Two A. baumannii strains, A118 and AB5075, commonly used as model systems, and three carbapenemresistant strains, which ar...
| Autores principales: | , , , , , , |
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| Formato: | article artículo publishedVersion |
| Lenguaje: | Inglés |
| Publicado: |
MDPI
2022
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/2133/23288 http://hdl.handle.net/2133/23288 |
| Aporte de: |
| id |
I15-R121-2133-23288 |
|---|---|
| record_format |
dspace |
| institution |
Universidad Nacional de Rosario |
| institution_str |
I-15 |
| repository_str |
R-121 |
| collection |
Repositorio Hipermedial de la Universidad Nacional de Rosario (UNR) |
| language |
Inglés |
| topic |
Acinetobacter Baumannii Antibiotic Resistance Quorum Sensing Biofilm Human Serum Albumin |
| spellingShingle |
Acinetobacter Baumannii Antibiotic Resistance Quorum Sensing Biofilm Human Serum Albumin Pimentel, Camila Le, Casin Tuttobene, Marisel Romina Subils, Tomás Bonomo, Robert A. Tolmasky, Marcelo E. Ramírez, María Soledad Interaction of Acinetobacter baumannii with Human Serum Albumin: Does the Host Determine the Outcome? |
| topic_facet |
Acinetobacter Baumannii Antibiotic Resistance Quorum Sensing Biofilm Human Serum Albumin |
| description |
Acinetobacter baumannii has become a serious threat to human health due to its extreme antibiotic resistance, environmental persistence, and capacity to survive within the host. Two A. baumannii strains, A118 and AB5075, commonly used as model systems, and three carbapenemresistant strains, which are becoming ever more dangerous due to the multiple drugs they can resist, were exposed to 3.5% human serum albumin (HSA) and human serum (HS) to evaluate their responsewithrespecttoantimicrobialresistance,biofilmformation,andquorumsensing,allfeatures responsible for increasing survival and persistence in the environment and human body. Expression levels of antibiotic resistance genes were modified differently when examined in different strains. The cmlA gene was upregulated or downregulated in conditions of exposure to 3.5% HSA or HS dependingonthestrain. Expressionlevelsofpbp1andpbp3tendedtobeincreasedbythepresenceof HSA and HS, but the effect was not seen in all strains. A. baumannii A118 growing in the presence of HS did not experience increased expression of these genes. Aminoglycoside-modifying enzymes were also expressed at higher or lower levels in the presence of HSA or HS. Still, the response was not uniform; in some cases, expression was enhanced, and in other cases, it was tapered. While A. baumannii AB5075 became more susceptible to rifampicin in the presence of 3.5% HSA or HS, strain A118 did not show any changes. Expression of arr2, a gene involved in resistance to rifampicin present in A.baumannii AMA16, was expressed at higher levels when HS was present in the culture medium. HSA and HS reduced biofilm formation and production of N-Acyl Homoserine Lactone, a compound intimately associated with quorum sensing. In conclusion, HSA, the main component of HS, stimulates a variety of adaptative responses in infecting A. baumannii strains. |
| format |
article artículo publishedVersion |
| author |
Pimentel, Camila Le, Casin Tuttobene, Marisel Romina Subils, Tomás Bonomo, Robert A. Tolmasky, Marcelo E. Ramírez, María Soledad |
| author_facet |
Pimentel, Camila Le, Casin Tuttobene, Marisel Romina Subils, Tomás Bonomo, Robert A. Tolmasky, Marcelo E. Ramírez, María Soledad |
| author_sort |
Pimentel, Camila |
| title |
Interaction of Acinetobacter baumannii with Human Serum Albumin: Does the Host Determine the Outcome? |
| title_short |
Interaction of Acinetobacter baumannii with Human Serum Albumin: Does the Host Determine the Outcome? |
| title_full |
Interaction of Acinetobacter baumannii with Human Serum Albumin: Does the Host Determine the Outcome? |
| title_fullStr |
Interaction of Acinetobacter baumannii with Human Serum Albumin: Does the Host Determine the Outcome? |
| title_full_unstemmed |
Interaction of Acinetobacter baumannii with Human Serum Albumin: Does the Host Determine the Outcome? |
| title_sort |
interaction of acinetobacter baumannii with human serum albumin: does the host determine the outcome? |
| publisher |
MDPI |
| publishDate |
2022 |
| url |
http://hdl.handle.net/2133/23288 http://hdl.handle.net/2133/23288 |
| work_keys_str_mv |
AT pimentelcamila interactionofacinetobacterbaumanniiwithhumanserumalbumindoesthehostdeterminetheoutcome AT lecasin interactionofacinetobacterbaumanniiwithhumanserumalbumindoesthehostdeterminetheoutcome AT tuttobenemariselromina interactionofacinetobacterbaumanniiwithhumanserumalbumindoesthehostdeterminetheoutcome AT subilstomas interactionofacinetobacterbaumanniiwithhumanserumalbumindoesthehostdeterminetheoutcome AT bonomoroberta interactionofacinetobacterbaumanniiwithhumanserumalbumindoesthehostdeterminetheoutcome AT tolmaskymarceloe interactionofacinetobacterbaumanniiwithhumanserumalbumindoesthehostdeterminetheoutcome AT ramirezmariasoledad interactionofacinetobacterbaumanniiwithhumanserumalbumindoesthehostdeterminetheoutcome |
| bdutipo_str |
Repositorios |
| _version_ |
1764820411921465347 |