TY - JOUR
T1 - TP53 Mutant Versus Wild-Type Zebrafish Larvae under Starvation Stress
T2 - Larvae Can Live Up to 17 Days Post-Fertilization Without Food
AU - Voskarides, Konstantinos
AU - Koutsofti, Constantina
AU - Pozova, Maria
N1 - Publisher Copyright:
© Copyright 2022, Mary Ann Liebert, Inc., publishers 2022.
PY - 2022/4
Y1 - 2022/4
N2 - In this study, an experimental protocol has been developed for comparing survival rates of mutant and wild-Type zebrafish larvae under extreme starvation. Zebrafish larvae were placed in 96-well plates at fourth day postfertilization (dpf) and larvae were not fed at all from hatching to cease. Zdf1 zebrafish line was used, a strain carrying the (cancer) pathogenic TP53-M214K amino acid substitution. TP53-M214 corresponds to the human TP53-M246 and both residues are located on the DNA-binding domain of the p53 protein. Survival statistical analysis did not show any significant difference in the overall survival rates between homozygous mutant and wild-Type larvae. When considering 15 dpf as the endpoint of the experiment (66% of larvae died), a borderline statistical significance was observed for the dominant model of inheritance (p = 0.015; relative hazard = 0.8320). Despite the fact yolk sac of larvae is depleted at 7-8 dpf, 34% of larvae survive until 15 dpf and 1.5% until 17 dpf. Concluding, three main results derive from this study: (1) pathogenic homozygous mutations in TP53 probably do not alter survival rates of zebrafish larvae under starvation; (2) zebrafish larvae can live up to 17 dpf without food, surviving only with their initial nutritional supplies; and (3) an easy and affordable protocol has been developed for estimating survival rates of zebrafish larvae under stressful conditions.
AB - In this study, an experimental protocol has been developed for comparing survival rates of mutant and wild-Type zebrafish larvae under extreme starvation. Zebrafish larvae were placed in 96-well plates at fourth day postfertilization (dpf) and larvae were not fed at all from hatching to cease. Zdf1 zebrafish line was used, a strain carrying the (cancer) pathogenic TP53-M214K amino acid substitution. TP53-M214 corresponds to the human TP53-M246 and both residues are located on the DNA-binding domain of the p53 protein. Survival statistical analysis did not show any significant difference in the overall survival rates between homozygous mutant and wild-Type larvae. When considering 15 dpf as the endpoint of the experiment (66% of larvae died), a borderline statistical significance was observed for the dominant model of inheritance (p = 0.015; relative hazard = 0.8320). Despite the fact yolk sac of larvae is depleted at 7-8 dpf, 34% of larvae survive until 15 dpf and 1.5% until 17 dpf. Concluding, three main results derive from this study: (1) pathogenic homozygous mutations in TP53 probably do not alter survival rates of zebrafish larvae under starvation; (2) zebrafish larvae can live up to 17 dpf without food, surviving only with their initial nutritional supplies; and (3) an easy and affordable protocol has been developed for estimating survival rates of zebrafish larvae under stressful conditions.
KW - antagonistic pleiotropy
KW - cancer
KW - experimental evolution
KW - molecular evolution
KW - natural selection
KW - tumor suppressor gene
UR - http://www.scopus.com/inward/record.url?scp=85128742368&partnerID=8YFLogxK
U2 - 10.1089/zeb.2022.0003
DO - 10.1089/zeb.2022.0003
M3 - Article
C2 - 35417275
AN - SCOPUS:85128742368
SN - 1545-8547
VL - 19
SP - 49
EP - 55
JO - Zebrafish
JF - Zebrafish
IS - 2
ER -