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Characterization of the molecular differential responses in marine benthic macroinvertebrates exposed to polycyclic aromatic hydrocarbons

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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 biomarkers 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 macroinvertebrates protect cells from reactive oxygen species formed during oxidative stress, and they also counteract 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 genomic tools can define toxicant-specific gene transcriptome variations, which can be utilized to identify the principal pathways that are affected. The review addresses analytical methods, similarities, and differences 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 macroinvertebrates are robust bioindicators for PAH assessments; thus, environmental risk assessments need a standardized quality and assurance methodology for contamination exposures and biomarker interpretation.
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Aquat Ecol (2024) 58:263–288
https://doi.org/10.1007/s10452-023-10064-4
Characterization ofthemolecular differential responses
inmarine benthic macroinvertebrates exposed topolycyclic
aromatic hydrocarbons
AmarachiP.Onyena · CathrineS.Manohar ·
JosephA.Nkwoji· LucianO.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 ofOceanography, DonaPaula, Goa, India
e-mail: cathrine@nio.org
A.P.Onyena· J.A.Nkwoji· L.O.Chukwu
Department ofMarine Sciences, Faculty ofScience,
University ofLagos, Lagos, LagosState, Nigeria
A.P.Onyena
Department ofMarine Environment andPollution Control,
Faculty ofMarine Environmental Management, Nigeria
Maritime University, Okerenkoko, Delta, DeltaState,
Nigeria
Content courtesy of Springer Nature, terms of use apply. Rights reserved.
... In environmental monitoring, biomarkers are defined as measurable variations in cellular, biochemical, physiological, or ecological components induced by anthropogenic factors. They effectively measure the extent of pollution caused by the accumulation of pollutants in marine organisms, highlighting potential risks to both organisms and humans (Onyena et al., 2023;Truchet et al., 2023). A reliable biomarker for environmental assessment should fulfill certain requirements: such as being easily measurable, having a short life cycle, being cost-effective, and sensitive to effects and exposure to pollutants (Lomartire et al., 2021). ...
... The use of ecological knowledge and monitoring data for stream modelling greatly improves the assessment of habitats and the understanding of the relationship between environmental variables and the occurrence of including oxidative stress and carcinogenicity, require standardised methods for environmental risk assessment. As robust bioindicators of PAHs, benthic macroinvertebrates play a crucial role, emphasising the need for a consistent approach to contamination exposures and biomarker interpretation (Onyena et al., 2023) Bromacil is a herbicide commonly used in agriculture, and Pisidium species, which belong to the subclass Bivalvia, are known to be relatively tolerant of this chemical. However, it is important to remember that any herbicide, even at tolerated levels, can have an impact on aquatic ecosystems and non-target organisms. ...
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