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Aquat Ecol (2024) 58:263–288
https://doi.org/10.1007/s10452-023-10064-4
Characterization ofthemolecular differential responses
inmarine benthic macroinvertebrates exposed topolycyclic
aromatic hydrocarbons
AmarachiP.Onyena · CathrineS.Manohar ·
JosephA.Nkwoji· LucianO.Chukwu
Received: 15 May 2023 / Accepted: 14 September 2023 / Published online: 29 September 2023
© The Author(s), under exclusive licence to Springer Nature B.V. 2023
genomic tools can define toxicant-specific gene tran-
scriptome variations, which can be utilized to identify
the principal pathways that are affected. The review
addresses analytical methods, similarities, and differ-
ences in antioxidant enzymes and the expression of
various genes studied. The comprehensive analysis
of literature reveals that several studies have explored
the responses of organisms to PAH pollution; this
included genes such as CYP450s, GST, SOD, GPx,
CAT, and HSPs. Numerous studies have consistently
demonstrated notable up-regulations in these genes,
establishing their characterization as PAH-sensitive
genes, highlighting the critical role played by them
for cellular defence and detoxification mechanisms.
PAHs can affect organisms depending on exposure
time, kind, matrix, and pollutant dose. Benthic mac-
roinvertebrates are robust bioindicators for PAH
assessments; thus, environmental risk assessments
need a standardized quality and assurance method-
ology for contamination exposures and biomarker
interpretation.
Keywords Biomarkers· Ecotoxicity· Stress
response· Environmental pollution· Crude oil·
Petroleum products
Introduction
Polycyclic aromatic hydrocarbons (PAHs), com-
monly described as polyaromatic hydrocarbons or
Abstract Polycyclic aromatic hydrocarbons (PAHs)
are organic chemicals that can induce oxidative stress,
genotoxicity, immunotoxicity, endocrine disruption,
and developmental toxicity and are carcinogenic.
Marine benthic macroinvertebrates are used as bio-
markers for elucidating the level of environmental
pollution due to their sedentary nature and ability
to accumulate toxic compounds over an extended
period. Antioxidant defence systems in macroinver-
tebrates protect cells from reactive oxygen species
formed during oxidative stress, and they also coun-
teract the effect of the pollutants through various
physiological adaptations and differential expression
of specific enzymes. A literature review on molecular
studies on various marine benthic macroinvertebrates
phyla was evaluated to understand their response
to different PAH exposures. Literature shows that
Handling Editor : S.S.S. Sarma
A.P.Onyena· C.S.Manohar(*)
Biological Oceanography Division, CSIR-National
Institute ofOceanography, DonaPaula, Goa, India
e-mail: cathrine@nio.org
A.P.Onyena· J.A.Nkwoji· L.O.Chukwu
Department ofMarine Sciences, Faculty ofScience,
University ofLagos, Lagos, LagosState, Nigeria
A.P.Onyena
Department ofMarine Environment andPollution Control,
Faculty ofMarine Environmental Management, Nigeria
Maritime University, Okerenkoko, Delta, DeltaState,
Nigeria
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