Zebrafish (Danio Rerio) Histopathology toDetermine the Toxicity of Triple AntibioticPaste, Nano-Silica, and Nano-Silica TripleAntibiotic Paste

Abstract

Introduction: This paper is an exploratory research on the histopathological impact of various nanoformulations
on zebrafish tissues, in comparison with the therapeutic potential of triple antibiotic paste (TAP), nano-silica (NS),
and nano-silica triple antibiotic paste (NSTAP). Although TAP and NS formulations have been demonstrated to be
effective in antimicrobial applications, they have some tissue compatibility limitations. This study examines the
issue of NSTAP, which is a combination of NS and antibiotics, as a more balanced and biocompatible treatment
option with fewer side effects. Materials and Methods: The adult male and female zebrafish were separated
into three treatment groups: Control, TAP, NS, and NSTAP, where each treatment was evaluated at Day 1 and
Day 7 after treatment. Gill, liver, intestine, and kidney tissues were removed and stained using hematoxylin
and eosin to view the morphological changes. The histopathological analysis was on structural integrity, cellular
degeneration, inflammatory reaction, and evidence of tissue adaptation or toughness in the various treatments.
Qualitative determination of the findings was done according to the presence of cellular atrophy, vacuolization,
inflammatory infiltrate, and tissue-specific adaptations. Results: Both the gills and kidneys showed signs of
high cellular stress in the TAP-treated group, which was accompanied by distinct lamellar atrophy, hepatocyte
vacuolization, and degeneration of glomeruli. Tissue stress was exhibited in the NS treatment with inflammatory
infiltrates and vacuolar changes of the liver and degeneration of intestinal and renal cells. Conversely, NSTAP
showed an equalized histopathological pattern of slight hyperplasia in gill epithelial cells, less hepatic and renal
degeneration, and indicators of goblet cell hyperplasia in the intestines, indicating a protective mucosal reaction.
All in all, the structural degradation and adaptive changes were reduced in NSTAP-treated zebrafish as compared
to TAP and NS groups. Discussion: The comparative analysis states the potential of NSTAP in facilitating
the adaptability of tissues, which means that there is a synergistic effect between NS and antibiotics. It was
demonstrated that NSTAP demonstrated improved biocompatibility with zebrafish tissues, which was presumably
caused by the controlled drug release and enhanced bioavailability. The altered structural responses in NSTAP-
treated tissues are controlled, which implies the activation of protective pathways, potentially related to the
immune modulation and oxidative stress alleviation. TAP and NS, in turn, exhibited increased cellular stress levels,
which implies that standalone formulations would need adjustments to be biocompatible