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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

d

aDepartmentofMedicalMicrobiology,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

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

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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.

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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

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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.

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