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1.
Nat Commun ; 14(1): 4942, 2023 08 15.
Artigo em Inglês | MEDLINE | ID: mdl-37582932

RESUMO

The current view of hematopoiesis considers leukocytes on a continuum with distinct developmental origins, and which exert non-overlapping functions. However, there is less known about the function and phenotype of ontogenetically distinct neutrophil populations. In this work, using a photoconvertible transgenic zebrafish line; Tg(mpx:Dendra2), we selectively label rostral blood island-derived and caudal hematopoietic tissue-derived neutrophils in vivo during steady state or upon injury. By comparing the migratory properties and single-cell expression profiles of both neutrophil populations at steady state we show that rostral neutrophils show higher csf3b expression and migration capacity than caudal neutrophils. Upon injury, both populations share a core transcriptional profile as well as subset-specific transcriptional signatures. Accordingly, both rostral and caudal neutrophils are recruited to the wound independently of their distance to the injury. While rostral neutrophils respond uniformly, caudal neutrophils respond heterogeneously. Collectively, our results reveal that co-existing neutrophils populations with ontogenically distinct origin display functional differences.


Assuntos
Neutrófilos , Peixe-Zebra , Animais , Peixe-Zebra/genética , Neutrófilos/metabolismo , Animais Geneticamente Modificados , Proteínas de Peixe-Zebra/genética , Proteínas de Peixe-Zebra/metabolismo , Hematopoese
3.
PLoS One ; 12(11): e0187696, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-29117213

RESUMO

Soybean meal has been used in many commercial diets for farm fish; despite this component inducing intestinal inflammation. On the other hand, microalgae have increasingly been used as dietary supplements in fish feed. Nevertheless, the vast quantity of microalgae species means that many remain under- or unstudied, thus limiting wide scale commercial application. In this work, we evaluated the effects to zebrafish (Danio rerio) of including Tetraselmis sp (Ts); Phaeodactylum tricornutum (Pt); Chlorella sp (Ch); Nannochloropsis oculata (No); or Nannochloropsis gaditana (Ng) as additives in a soybean meal-based diet on intestinal inflammation and survival after Edwardsiella tarda infection. In larvae fed a soybean meal diet supplemented with Ts, Pt, Ch, or Ng, the quantity of neutrophils present in the intestine drastically decreased as compared to larvae fed only the soybean meal diet. Likewise, Ts or Ch supplements in soybean meal or fishmeal increased zebrafish survival by more than 20% after being challenged. In the case of Ts, the observed effect correlated with an increased number of neutrophils present at the infection site. These results suggest that the inclusion of Ts or Ch in fish diets could allow the use of SBM and at the same time improve performance against pathogen.


Assuntos
Ração Animal/efeitos adversos , Infecções Bacterianas/prevenção & controle , Doenças dos Peixes/prevenção & controle , Glycine max/efeitos adversos , Intestinos/imunologia , Microalgas/química , Ração Animal/análise , Animais , Infecções Bacterianas/imunologia , Infecções Bacterianas/microbiologia , Infecções Bacterianas/veterinária , Suplementos Nutricionais/efeitos adversos , Edwardsiella tarda/crescimento & desenvolvimento , Edwardsiella tarda/patogenicidade , Doenças dos Peixes/etiologia , Doenças dos Peixes/imunologia , Doenças dos Peixes/microbiologia , Inflamação , Intestinos/microbiologia , Microalgas/imunologia , Neutrófilos/imunologia , Glycine max/imunologia , Peixe-Zebra/imunologia , Peixe-Zebra/microbiologia
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