Anais
Brasileiros
de
Dermatologia
www.anaisdedermatologia.org.br
INVESTIGATION
Ischemia-modified
albumin
as
a
possible
marker
of
oxidative
stress
in
patients
with
telogen
effluvium
夽,夽夽
Unsal
Savci
a,∗,
Engin
Senel
b,
Aynure
Oztekin
b,
Mustafa
Sungur
c,
Ozcan
Erel
d,
Salim
Neselioglu
daDepartmentofMedicalMicrobiology,ErolOlcokEducationandResearchHospital,HititUniversity,C¸orum,Turkey bDepartmentofDermatology,FacultyofMedicine,HititUniversity,C¸orum,Turkey
cDepartmentofUrology,ErolOlcokEducationandResearchHospital,HititUniversity,C¸orum,Turkey dDepartmentofBiochemistry,AtaturkTrainingandResearchHospital,Ankara,Turkey
Received29May2019;accepted10January2020 Availableonline6May2020
KEYWORDS
Alopecia; Inflammation; Oxidativestress
Abstract
Background: Telogeneffluviumisthemostcommonformofnon-scarringalopeciacharacterized bydiffusehairloss.Ischemia-modifiedalbuminisamarkerofoxidativestressandinflammation.
Objective: Theaimofthisstudywastocomparethelevelsofischemia-modifiedalbuminof telogeneffluviumpatientswithhealthycontrols.
Methods: Ninety-one patients diagnosed with telogen effluviumand 35 healthy volunteers wereincludedinthestudy.Serumischemia-modifiedalbuminlevelwasdeterminedbya fast-colorimetricmethod,andalbumincobaltbindingtest.Theresultswereevaluatedstatistically.
Results: Therewasnostatisticallysignificantdifferencebetweentheserumalbuminvaluesof patientandcontrolgroups (p=0.739).Serumischemia-modifiedalbuminvalueswere signifi-cantlyhigherinthepatientswithtelogeneffluviumthanhealthycontrols(p<0.001).
Studylimitations: Body massindex values of the patient and control groups could not be calculated.
Conclusions: Tothebestoftheauthors’knowledge,thisisthefirstclinicalstudytoinvestigate theroleofoxidativestress inthepathogenesisoftelogeneffluviumusingischemia-modified albuminasabiomarker.Basedontheresultsofthepresentstudy,itcanbeconsideredthat oxidative stressplaysanimportantrole inthepathogenesisoftelogeneffluvium.Thereisa
夽 Howtocitethisarticle:SavciU,SenelE,OztekinA,SungurM,ErelO,NeseliogluS.Ischemiamodifiedalbuminasapossiblemarkerof
oxidativestressinpatientswithtelogeneffluvium.AnBrasDermatol.2020;95:447---51.
夽夽StudyconductedattheErolOlcokEducationandResearchHospital,HititUniversity,C¸orum,Turkey.
∗Correspondingauthor.
E-mail:[email protected](U.Savci).
https://doi.org/10.1016/j.abd.2020.01.005
0365-0596/©2020SociedadeBrasileiradeDermatologia.PublishedbyElsevierEspa˜na,S.L.U.ThisisanopenaccessarticleundertheCC
needforfurtherstudiestosupporttheresultsofthisstudy,todemonstratethepossibleeffects ofoxidativestress,andtoinvestigatetheotheroxidativestressmarkersinthepathogenesisof telogeneffluvium.
©2020SociedadeBrasileiradeDermatologia.PublishedbyElsevierEspa˜na,S.L.U.Thisisan openaccessarticleundertheCCBYlicense(http://creativecommons.org/licenses/by/4.0/).
Introduction
Telogeneffluvium(TE)isatypeofnonscarringalopecia cha-racterized by often acute and diffuse hair shedding and caused or induced by various acute and chronic diseases andphysiologicalstressfulevents.Thediseaseisoneofthe mostcommon causes of diffuse hair loss. Pathogenesis of thedisorderisquiteheterogenous.1Headingtonattempted
toclassifythediseaseandsuggestedfivedifferent pathoge-nies:(1)immediateanagenrelease,(2)immediatetelogen release, (3) delayed anagen release, (4) delayed telogen release,and(5)shortenedanagen.2
Each hair follicle has three cyclic phases: anagen (growth),catagen(regressionleadingtoapoptosis),and tel-ogen(resting). Approximately 100,000 hairs arefound on thescalp, of which 10---15% are in the telogen phaseand 85---90%intheanagenphase.Onaverage,theanagenphase laststwoto sixyears,the catagenphaselasts fourtosix weeks,andtelogenphaselaststhreetofourmonthsinthe scalp.3 Theend oftheanagenphaseandtheonsetofthe
catagen/telogen phaseare associated with the biological clock, which is a highly complex phenomenon that arises onamolecularbasisinthehumanbody.Variousmetabolic changesduetopregnancy,malnutrition,andvarious stress-ful conditions may affect the biological clock in the hair folliclesandabnormallymanyhairfolliclescanenterthe tel-ogenphasesimultaneously.Ifthegrowthofasignificantpart ofthehairintheanagenphasestopsearlyduetotheeffect ofanystimulation,itentersthecatagenphase,followedby telogenphase,resultingintheformationofTE.4The
patho-genesisofTEisunclearandmanytriggeringconditionsmay play rolein the pathogenesis, such asenvironmental and metabolic factors, including hormones, toxins, cytokines, nutrients,vitamins,andenergydeficiencies.5
Oxidative stress has been shown to play a key role in thesedisordersasinmanydiseases.Presenceofoxidative stresshasbeen demonstratedin manydermatological dis-easessuchasseborrheicdermatitis, vitiligo,skin cancers, lichen planus, atopic dermatitis, acne vulgaris, psoriasis, andpemphigusvulgaris.6---12
Various biochemical markers have been detected in oxidativestressandinflammationsofar.Ischemia-modified albumin(IMA)isoneofthesemarkers.Thismarkerhasbeen usedfor thedetectionof myocardial ischemia.IMA levels havebeenreportedtoincreaseinvascularendothelialcell dysfunction and oxidative stress-related diseases. During ischemia,themetalbindingcapacityofalbumindecreases duetofreeradicaldamageattheendoftheaminoterminus (N-terminus)ofthemetal-bindingpart.13 Thisnew,
chemi-callyalteredordegradedalbumincausedbytissueischemia iscalledIMAandisusedasasensitivebiochemicalmarker ofischemiaandoxidativestress.14
Inrecentyears,highlevelsofIMAhave beenindicated tobe associatedwithvarious diseases basedonoxidative stress.15InalimitednumberofstudiesinvestigatingIMA
lev-elsindermatologicaldiseases,highlevelsofIMAhavebeen reportedinseveraldermatologicaldiseasessuchasvitiligo, psoriasis,andBehc¸et’s.16---18Increasedmedianandadjusted
IMAlevelsweredetectedinalopeciaareatapatientsinthe liteature.19 Ina recent study,it wasnoted thatoxidative
stress is closely associatedwith TEpathogenesis.20 In the
medicalliteraturetherearenostudiesinvestigatingIMA lev-elsasoxidativestressbiomarkersinpatientswithTE.Inthe presentstudy,itwashypothesizedthatthepathogenesisof TEmightbeassociatedwithIMA.
Theaim ofthis studywastocompare IMAlevelsof TE patients with the healthy control group. To best of the authors’knowledge,therehavebeennostudies investigat-ingoxidant---antioxidantbalanceandoxidativestressinthe patientswithTEinthemedicalliterature.Thisrepresents the firstclinical studyevaluating oxidativestress and IMA levelsinthepatientswithTE.
Methods
Thisstudyincluded91patients(83females,8males)older than 18yearsadmitted tothedermatology clinic withTE diagnosisand35healthyvolunteers(31females,4males). The current study wasapprovedby the EthicsCommittee of Tokat Gaziosmanpas¸a Medicine Faculty under number 19-KAEK-002, carried outin accordance with theHelsinki Declaration. Written informedconsentwasobtained from allpatientsandhealthyvolunteers.
The diagnosis wasmade by detailedphysical examina-tion,patienthistory(morethan100hairslostperday),and positivehairpulltest.Thehairpulltestisstronglypositive in TE andis performed by grasping 40---60 scalphair with thumbandindexfingerandpullinggently.Ifmorethantwo tothreehairsareremovedwithtraction,thetestshouldbe consideredaspositive.
Othercausesofhairlosssuchastrichotillomania, alope-ciaareata,cicatricialalopecia,andandrogeneticalopecia wereruledoutinthepatientsincludedandallpatientswith an additionalhair disorderwereexcluded fromthestudy. The controlgroup comprisedvolunteers whohadno com-plaintsofhair lossandwiththesameexclusioncriteriaas theTEpatientgroup.
The exclusion criteria for patient and healthy control groupswereasfollows:presenceofsystemicdisease, car-diovascular disease, history of surgery, low calorie diet, severe weightloss,activesmoking, ironsupplementation, presenceof menstrualirregularities,pregnancy,lactation, andhairlosscausedbydruguse.Allpatientswithpossible conditionsthatwerelikelytoalterIMAlevelwereexcluded.
Table1 Demographiccharacteristicsofpatientandcontrolgroups,andserumalbuminandIMAlevels.
Parameter Control(n=35) Patients(n=91) p
Age(mean±SD,years) 32.08±11.60 31.64±12.86 p=0.867
Gender(male/female) 4/31 8/83 p=0.736
Serumalbumin(mean±SD,g/L) 4.08±0.11 4.08±0.10 p=0.739
IMA(mean±SD,g/L) 0.50±0.09 0.77±0.14 p<0.001a
IMA,ischemia-modifiedalbumin;SD,standarddeviation.
a Statisticallysignificant.
Venousblood sampleswere collectedafter at least8hof fastingfrom the patientand controlgroups. The samples werecentrifugedat1500gfor10minandtheserumsamples wereseparated.Separatedserumsampleswereplancedin Eppendorftubesandstoredat−80◦C.
The IMA level was measured using the albumin cobalt bindingtest,afast-colorimetricmethoddevelopedby Bar-Or et al.21 The method is based on the reduction of the
abilityof humanserumalbumin tobindcobaltions(Co2+)
depending on ischemia. As a result of the ischemic pro-cess,modified albuminwasmuchlessboundtoCo(II)and theexcess(unbound)Co2+ amountformed acomplexwith
dithiothreitol, and this complex was measured at 450nm spectrophotometrically.Plasmaalbuminlevelwasmeasured intheautoanalyzerbyusingthebromocresolgreenmethod (ArchitectPlusC8000;Abbott---UnitedStates).
ThestatisticalanalysiswasperformedbyusingSPSS(SPSS v.23.0forWindows---SPSSInc.,Chicago,IL,UnitedStates; licensedforHititUniversity).Shapiro---Wilktestwasusedto checkthenormalityassumptionforthedistributionofthe quantitativevariables(serumalbumin,IMA).Foralltested variables, the normality assumption could be considered valid.Student’st-testforindependentsamplesandFisher’s exacttestwereperformedtodetectpossibledifferencesof ageandgenderbetweenthepatientandcontrolgroups.A
p-value<0.05wasconsideredstatisticallysignificant.
Results
Themeanagewas31.64±12.86yearsforthepatientgroup and 32.08±11.60 years for the controls. There was no statistically significant difference between the groups in termsofageandsex(p=0.867andp=0.736,respectively). There was no statistically significant difference between thetwogroupsinterms ofalbuminvalues(p=0.739).The meanIMAvaluewassignificantlyhigherinthepatientgroup (0.77±0.14g/L) than the control group (0.50±0.09g/L). Therewerestatisticallysignificantdifferencesbetweentwo groupsIMAvalues(p<0.001).Demographiccharacteristics, albumin,andIMAvaluesandstatisticalvaluesofthegroups areshownintable1.
Discussion
TEisadiseasecharacterizedbythinningorsheddingofthe hairinresponsetotheearlyentryofthehairintothetelogen phase.Thedisorderwasfirstdescribedin1961byKligman. DiagnosticpropertiesofTEarethinningoftheaffectedhair anddiffusehairlosswithastronglypositivehairpullteston
ascalpthatlooksnormal.AtriggeringfactorcausingTEis oftenfoundinthepatient’shistory.1
IMA was accepted asa marker of myocardial ischemia bytheFoodandDrugAdministration.As aresultof expo-suretoreactiveoxygenspeciesinthecaseofischemia,the metal(cobalt,copper, zinc)bindingcapacityofalbuminis decreased.15 This marker is not only specific for
myocar-dialinjuryandischemia.IMAlevelshavebeenreportedin manydiseasessuchassepsis,cancer,diabetes,chronicliver disease,andasthma.22---25
IMAhasbeendescribedasabiomarkerofoxidativestress andextensivelyinvestigatedrecently.21 The susceptibility,
specificity, capacity, and positive and negative predictive values of IMA were detected higher than other studied biomarkers.There have been no studies in the literature investigating oxidative stress in patients with TE. To the bestoftheauthors’knowledge,alimitednumberofstudies havebeenconductedevaluatingIMAlevelsindermatological diseases.
Atas¸etal.investigatedtheimportanceofoxidativestress in the pathogenesis of vitiligo by measuring the level of IMA; in their study, IMA levels were found to be signifi-cantlyhigher inthe patientgroup than the controlgroup (p<0.0001).16
Ozdemiretal.reportedthatIMAlevelswere significan-tly higher in patients withpsoriasis comparedto healthy controls.TheynotedthatIMAcouldbeproducedasan adap-tiveresponsetochronichypoxiaandoxidativestress,which is responsible for the systemic inflammation in psoriasis, andthatoxidativestresshasanimportanceinthe develop-mentofpsoriasis.17Inanotherstudy,Ommaetal.evaluated
theroleofIMAasabiomarkerinBehc¸et’sdiseaseactivity. Inthisstudy,serumIMA levelsweresignificantlyhigherin Behc¸et’sdiseasethanhealthyvolunteers(p<0.001).18Like
theresultsofpreviousdermatologicaldiseasesreportedin theliterature,thepresentstudyfoundthatserumIMA lev-elswerestatisticallyhigherinTE patientsthaninhealthy controls(p<0.001).Previousstudiesandtheresultsofthe presentstudymaysupporttherelationshipbetween oxida-tive stress and the pathogenesis of these dermatological diseases.
Itishypothesizedthatthescalpskinmaybechronically exposedtobothendogenousandenvironmentalpro-oxidant agents,leadingtotheformationofreactiveoxygenspecies fromdamagetocellularcomponentssuchasnucleicacids, proteins, and cell membrane lipids, and that this may resultindeteriorationoftheantioxidant/oxidantbalance. Inaddition,insufficientantioxidantdefenseandexcessive productionoffreeradicalsmaycontributetotheformation ofoxidativestress.26Itisimportanttoemphasizethatthere
isanincreaseinIMAlevelsincasesofhypoxia,acidosis,and tissuedamagecausedbyfreeradicals.17 IMAlevelsmaybe
higherinTEpatientsasincreasedoxygenradicalsaffectthe structureofalbumin.Thelimitationofthepresentstudywas thatbodymass indexvaluesofpatientandcontrolgroups couldnotbecalculated.
Conclusions
Basedontheresultsofthisstudy,oxidativestressmayplay animportantroleinthepathogenesisofTE.Thisisthefirst clinicalstudy toinvestigatetheroleof oxidative stressin thepathogenesisofTEusingIMAasabiomarker.Inaddition, thisstudymayprovidesignificantevidencethatantioxidant therapywouldbeusefulinTE.Furtherstudiesareneededto supporttheresultsofthisstudy,todemonstratethe proba-bleeffectsofoxidativestress,andtoinvestigatetheother oxidativestressmarkersinthepathogenesisofTE.
Financial
support
Nonedeclared.Authors’
contributions
UnsalSavci:Statisticalanalysis;approvalofthefinalversion of themanuscript; conception and planningof the study; drafting andediting of the manuscript; collection, analy-sis,andinterpretationofdata;intellectualparticipationin thepropaedeuticand/ortherapeuticconductofthestudied cases;criticalreviewoftheliterature.
EnginSenel:Conceptionandplanningofthestudy; col-lection,analysis,andinterpretationofdata;criticalreview oftheliterature;criticalreviewofthemanuscript.
Aynure Oztekin:Conceptionand planningof thestudy; collection,analysis, andinterpretationof data; participa-tioninthestudydesign;criticalreviewoftheliterature.
MustafaSungur:Statisticalanalysis;draftingandediting ofthemanuscript.
OzcanErel:Conceptionandplanningofthestudy; draft-ingandeditingofthemanuscript;participationinthestudy design.
SalimNeselioglu:Conceptionandplanningofthestudy; participationinthestudydesign;criticalreviewofthe lit-erature.
Conflicts
of
interest
Nonedeclared.References
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