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Cancers2022,14,4873.https://doi.org/10.3390/cancers14194873www.mdpi.com/journal/cancers
Article
TheClinicalImpactofHepaticArterialInfusion
ChemotherapyNew‐FPforHepatocellularCarcinomawith
PreservedLiverFunction
HidekiIwamoto
1,2,
*,TakashiNiizeki
1
,HiroakiNagamatsu
3
,
KazuomiUeshima
4
,JojiTani
5
,TeijiKuzuya
6
,
KazuhiroKasai
7
,YouheiKooka
8
,AtsushiHiraoka
9
,RieSugimoto
10
,TakehiroYonezawa
11
,SatoshiTanaka
12
,
AkihiroDeguchi
13
,ShigeoShimose
1
,TomotakeShirono
1
,MiwaSakai
1
,HiroyukiSuzuki
1
,EtsukoMoriyama
1
,
HironoriKoga
1
,TakujiTorimura
14
,TakumiKawaguchi
1
,NewFPStudyGroupandKurumeLiverCancerStudy
GroupofJapan
1
DivisionofGastroenterology,DepartmentofMedicine,KurumeUniversitySchoolofMedicine,
Kurume830‐0011,Japan
2
IwamotoInternalMedicineClinic,Kitakyusyu802‐0832,Japan
3
DepartmentofGastroenterology,JuntendoUniversity,Bunkyo‐ku113‐8421,Japan
4
DepartmentofGastroenterologyandHepatology,FacultyofMedicine,KindaiUniversity,Osaka589‐8511,
Japan
5
DepartmentofGastroenterologyandNeurology,FacultyofMedicine,KagawaUniversity,Miki761‐0793,
Japan
6
DepartmentofGastroenterologyandHepatology,FujitaHealthyUniversity,Toyoake470‐1101,Japan
7
DivisionofGastroenterology,IMSSapporoDigestiveDiseaseCenterGeneralHospital,Sapporo063‐0842,
Japan
8
DivisionofHepatology,DepartmentofInternalMedicine,IwateMedicalUniversitySchoolofMedicine,
Iwate028‐3695,Japan
9
GastroenterologyCenter,EhimePrefecturalCentralHospital,Matsuyama790‐0024,Japan
10
DepartmentofHepato‐Biliary‐Pancreatology,NationalHospitalOrganizationKyushuCancerCenter,
Fukuoka811‐1395,Japan
11
DepartmentofGastroenterology,HachinoheRedCrossHospital,Aomori039‐1104,Japan
12
DepartmentofGastroenterologyandHepatology,NationalHospitalOrganizationOsakaNationalHospital,
Osaka162‐8655,Japan
13
DepartmentofGastroenterology,KagawaRosaiHospital,Marugame763‐8502,Japan
14
DepartmentofGastroenterology,OmutaCityHospital,Omuta836‐0861,Japan
*Correspondence:iwamoto_hideki@med.kurume‐u.ac.jp;Tel.:+81‐942‐35‐3311;Fax:81‐942‐31‐7747
SimpleSummary:New‐FPisaregimenofhepaticarterialinfusionchemotherapyforhepatocellu‐
larcarcinoma(HCC).Inthestudy,theregimensignificantlyprolongedthesurvivalofpatientswith
majorportalveintumorthrombus‐HCC.
Abstract:Background:Systemictreatmentsarerecommendedforadvancedhepatocellularcarci‐
noma(HCC)inpreservedliverfunction.However,theireffectsareunsatisfactoryinsometumor
conditions,particularlymacrovascularinvasion(MVI)includingmajorportalveintumorthrombus
(PVTT).Wecomparedtheefficacyofhepaticarterialinfusionchemotherapy(HAIC)regimens
New‐FPandsorafenibforvarioustumorconditionsinpreservedliverfunction.Methods:Weret‐
rospectivelycollectedthedataof1709patientswithHCCwhoweretreatedwithNew‐FPorsoraf‐
enib.Survivalwasassessedafterpropensityscorematching.Subgroupanalyseswereconducted:
cohort1(noMVIorextrahepaticspread(EHS)),cohort2(MVIonly),cohort3(EHSonly),cohort4
(MVIandEHS),andcohort5(majorPVTT).Results:TheNew‐FPgrouphadalongermediansur‐
vivaltime(MST)thanthesorafenibinthewholeanalysis(18vs.9months;p<0.0001).New‐FP
demonstratedalongerMSTcomparedwithsorafenibincohort2andcohort4.Incohort5,theMST
oftheNew‐FPgroupwas16months,whilethatofsorafenibwas6months(p<0.0001).Formajor
PVTT‐HCC,theresponserateofNew‐FPwas73.0%.TheMSTofpatientswhoachievedcomplete
responsewithNew‐FPwas59months.Conclusions:HAICusingNew‐FPispromisingforpatients
withMVI‐andmajorPVTT‐HCCinpreservedliverfunction.
Citation:Iwamoto,H.;Niizeki,T.;
Nagamatsu,H.;Ueshima,K.;Tani,
J
.;Kuzuya,T;Kasai,K;Kooka,Y;
Hiraoka,A;Sugimoto,R.;etal.The
ClinicalImpactofHepaticArterial
InfusionChemotherapyNew‐FPfor
HepatocellularCarcinomawith
PreservedLiverFunctionn.Cancers
2022,14,4873.https://doi.org/
10.3390/cancers14194873
AcademicEditor:QuirinoLai
Received:22August2022
Accepted:3October2022
Published:5October2022
Publisher’sNote:MDPIstaysneu‐
tralwithregardtojurisdictional
claimsinpublishedmapsandinstitu‐
tionalaffiliations.
Copyright:©2022bytheauthors.Li‐
censeeMDPI,Basel,Switzerland.
Thisarticleisanopenaccessarticle
distributedunderthetermsandcon‐
ditionsoftheCreativeCommonsAt‐
tribution(CCBY)license(https://cre‐
ativecommons.org/licenses/by/4.0/).
Cancers2022,14,48732of14
Keywords:hepaticarterialinfusionchemotherapy;sorafenib;propensityscorematching;retrospec‐
tivecohortstudy;systemictreatment
1.Introduction
Nowadays,systemictreatmenthasbeenremarkablydevelopedforhepatocellular
carcinoma(HCC)[1].Sorafenibwasthefirstmolecular‐targetedagent(MTA)approved
forHCCtreatment[2].Currently,atezolizumabplusbevacizumabhasbecomethe1st‐line
drug[3].However,sorafenibisstillanalternativechoicefor1st‐linetherapy[3].Systemic
treatmentisrecommendedforintermediate‐stageHCCrefractorytotranscatheterarterial
chemoembolizationandforadvanced‐stageHCC[4].
Macrovascularinvasion(MVI)andextrahepaticspread(EHS)aretwofactorsthat
defineadvanced‐stageHCC[5].HCCwithMVI(MVI‐HCC),andespeciallyHCCwith
portalveintumorthrombus(PVTT),isacriticalconditionthatcandirectlycausedeterio‐
rationofliverfunction.Althoughsystemictreatmentisrecommendedforadvanced‐stage
HCC,therapeuticeffectsarenotyetsatisfactoryforMVI‐HCC[6].Findingthebestthera‐
peuticstrategyrepresentsanunmetmedicalneed.
Locoregionaltreatmentshavetraditionallybeenadministeredinthetreatmentof
HCC.Hepaticarterialinfusionchemotherapy(HAIC)isafrequentlyadministeredtreat‐
mentforadvancedHCC[7,8].Recently,theguidelineregardingHAICwasalsoreported
[9].HAICdirectlyandconsecutivelydeliverschemotherapeuticdrugstothetumorusing
cathetertechniques.Accordingtopreviousreports,strongerlocalcontrol(withlesstox‐
icity)isanoutstandingfeatureofHAICascomparedwithsystemicchemotherapy[10].
However,HAICisnotastandardtreatmentrecommendedwithincurrentguidelinesdue
totherelativesparsityofgold‐standardclinicaltrialsconductedtodate[11].Recentclin‐
icaltrialshaveprovidedsomeevidencesupportingtheefficacyofHAICinthetreatment
ofHCC,andtheclinicalevidenceinregardtoHAIChasgraduallybeenincreasing[12,13].
Herein,wereportontheefficacyofaHAICregimen,“New‐FP”(i.e.,fine‐powdercispla‐
tin(DDP‐H,NipponKayakuCo.Ltd.,Tokyo,Japan)suspendedinlipiodoland5‐fluor‐
ouracil),inthetreatmentofadvancedHCC.Recently,weconductedalargemulticenter
retrospectivecohortstudycomparingtheefficacyofNew‐FPandsorafenibtoenhance
evidenceregardingthereproducibilityanduniversalityofNew‐FP[14].Thisstudyre‐
vealedtheusefulnessoflocoregionaltreatmentusingNew‐FP.However,questionsre‐
mainregardingtheimpactofliverfunctionandtumorcondition.Wenotedthatone‐third
oftheanalyzedpopulationincludedpatientswithChild‐PughClassBliverfunction.As
thecurrentlyapprovedsystemictreatmentstargetpatientswithpreservedliverfunction,
itisnecessarytocomparetheefficacyofNew‐FPandsorafenibinpatientswithpreserved
liverfunctioninordertodeterminethepreciseefficacyofthistreatmentmodality.
MajorPVTT,whichinvolvestumorinvasionintothe1stbranchandtrunkofthepor‐
talvein,isalife‐threateningtumorconditionwithashortsurvivalprognosis[15].Alt‐
houghsystemictreatmentsarerecommendedformajorPVTT‐HCC,theirtherapeuticef‐
fectsareunsatisfactory[16].Therefore,thereisaneedtoclarifytheefficacyoflocoregional
treatmentformajorPVTT‐HCC.
ThisstudyaimedtoclarifytheefficacyofNew‐FPinthetreatmentofHCCinpatients
withpreservedliverfunctionbycomparingtheoutcomesofNew‐FPandsorafenibusing
propensityscorematching(PSM)analysis.Additionally,weexaminedthedetailedther‐
apeuticeffectsofNew‐FPinpatientswithmajorPVTT‐HCC.Thegoalofthisstudywas
tosupporttheidentificationofthebesttherapeuticstrategyforMVI‐HCCandmajor
PVTT‐HCCinpatientswithpreservedliverfunction.
Cancers2022,14,48733of14
2.MaterialsandMethods
2.1.StudyDesign
Amulticenterretrospectivecohortstudywasconductedinthestudyforpatients
withHCC.ThepatientswithHCCwhowereinitiallytreatedwithNew‐FPorsorafenib
wereenrolled.ThepatientsweretreatedintheKurumeLiverCancerStudyGroupandat
eightotherhospitalsbetweenMarch2009andJune2019.HCCwasdiagnosedbybiopsy
orradiologicalevaluation.Theenrolledpatientswere>18years.Deathorend‐of‐study
censoring(June30,2019)wasthecompletefollow‐upperiod.Thepatientswhocouldnot
collectthedatawereexcluded.TheEthicsCommitteeoftheKurumeUniversitySchoolof
Medicineapprovedthestudy(No.19004).Thewritteninformedconsentwaswaivedow‐
ingtotheretrospectivestudydesign.
2.2.Patients
Informationoftheenrolledpatientswascollectedfrompatients’medicalrecords.
TheclinicalstagewasjudgedbytheBarcelonaClinicLiverCancer(BCLC)stagingsystem
[5].HAICwasmainlyadministeredforpatientswithupto7outinBCLC‐BorPVTTin
BCLC‐C.Incaseswithextrahepaticmetastasis,ifhepaticlesionswereprogressed,wecon‐
sideredadministrationofHAICtocontrolhepaticlesionsfirst.MVIwasdiagnosedby
enhancedcomputedtomographyormagneticresonanceimaging.MajorPVTTincludes
tumorinvasionintothe1stbranch(Vp3)andtrunk(Vp4)oftheporalvein.
2.3.EvaluationItems
Thefollowingitemswereevaluated:(i)overallsurvival(OS),beforeandafterPSM;
(ii)factorsassociatedwithpoorprognosisafterPSM;(iii)OSinfourcohortscategorized
bythepresenceofMVIandEHS(afterPSM),asfollows:cohort1(noMVIorEHS),cohort
2(MVIwithnoEHS),cohort3(EHSwithnoMVI),andcohort4(MVIandEHS);and(iv)
anOSandforestplotanalysisinpatientswithmajorPVTT‐HCC(regardlessofthepres‐
enceofEHS),beforeandafterPSM(cohort5).
2.4.PropensityScoreMatching
DifferentdistributionsofcovariatesbetweentheNew‐FPandsorafenibgroupswere
adjustedusingPSM.Thefollowingvariables:sex,age,HCCetiology,Child–Pughclass,
tumorsize,thepresenceofMVI,thepresenceofEHS,AFPlevel,andDCPlevelwereused
forPSM.Aone‐to‐onenearest‐neighbormatchingalgorithmwithanoptimalcaliperof
0.3withoutreplacementwasusedtogeneratepairsofpatientsineachanalysis.Ineach
medicationgroup(i.e.,bothsorafenibandNew‐FP),therewere198patientsenrolledin
theoverallanalysis,38patientsincohort1,76patientsincohort2,sixpatientsincohort
3,38patientsincohort4,and78patientsincohort5.
2.5.TreatmentProtocol
2.5.1.Sorafenib
Administrationofsorafenib(Nexavar;BayelCo.,Ltd.,Osaka,Japan)wasconducted
accordingtomanufacturerrecommendations.
2.5.2.New‐FP
Initially,DDP‐H(50mg/body)suspendedin5–10mLoflipiodolwasadministered
forpatientsunderangiography,and5‐FU(250mgbolusinjectionand1250mgcontinuous
injectionusinganinfusionballoonpump)wereadministered.ThedoseoftheNew‐FP
regimenwasdeterminedbythetherapeuticresponseandadverseevents.Therapeutic
responsewasassessedusingthemodifiedResponseEvaluationCriteriainSolidTumors
(mRECIST)criteria[17].Completeresponse(CR)isdisappearanceofintratumoralarterial
Cancers2022,14,48734of14
enhancement.Partialresponse(PR)isa>30%decreaseinviabletargetlesions.Stabledis‐
ease(SD)isneitherPRnorprogressivedisease(PD).PDisa>20%increaseinviabletarget
lesions.
2.6.StatisticalAnalyses
Datawereexpressedascountsormeansandstandarddeviations.Allstatisticalanal‐
yseswerecarriedoutusingJMPstatisticalanalysissoftware(JMPProversion14,SAS
InstituteInc.,Cary,NC,USA).OSwasestimatedbytheKaplan–Meiermethod.Factors
associatedwithprognosiswereevaluatedbyunivariateandmultivariateanalysisusing
Coxproportionalhazardsmodels.Variablesassociatedwithprognosis(p<0.10)onuni‐
variateanalysiswereenteredintothemultivariateregressionmodel.Statisticalsignifi‐
cancewassettoatwo‐tailedp‐valueof<0.05.
3.Results
3.1.PatientandTumorCharacteristics
TheflowdiagramforstudyenrollmentisshowninFigure1.Atotalof1709consec‐
utivelypresentingpatientsdiagnosedwithHCC,including671intheNew‐FPgroupand
1038inthesorafenibgroup,wereenrolledinthisstudy.Amongthem,436patientswere
excludedfromthepresentanalysisbecauseofChild–PughclassBorCliverfunctioncat‐
egorizations.Additionally,11patientswereexcludedbecauseofincompletedata.Finally,
1262patients,including418intheNew‐FPgroupand844inthesorafenibgroup,were
enrolledinthePSManalysis.
Figure1.Flowchartillustratingthestudyinclusionandexclusionprocess.EHS,extrahepaticspread;
MVI,macrovascularinvasion;New‐FP,fine‐powdercisplatinand5‐fluorouracil;PVTT,portalvein
tumorthrombus.
PatientcharacteristicsaresummarizedinTable1.Etiology,tumorsize,thepresence
ofMVIandEHS,BCLCstage,andmeanDCPlevelwerestatisticallysignificantlydifferent
betweenthetwogroupsbeforePSM.However,statisticaldifferencesdisappearedafter
PSM(Table1).
Cancers2022,14,48735of14
Table1.Patientcharacteristicsbeforeandafterpropensityscorematching.
BeforeMatchingn=1262AfterMatchingn=396
PatientCharacteris‐
tics
New‐FP
n=418
Sorafenib
n=844p‐ValueNew‐FP
n=198
Sorafenib
n=198
p‐
Value
Age(years)68.6±10.970.1±9.610.939866.6±10.965.3±10.70.8046
Sex(male/female)327/91677/1670.415462/1660/180.8127
HCV/HBV/non‐viral181/77/160465/154/225<0.000137/19/2227/28/230.8074
Child–Pughscore(5/6)251/167526/3170.0563 0.1263
Tumorcharacteristics
Tumorsize(cm)8.29±4.603.59±3.39<0.00017.62±4.217.26±4.750.8107
MVI(+/−)357/61605/239<0.0001143/55146/520.7342
SeverePVTT(+/−)177/180114/491<0.0001117/8178/1200.2304
EHS(+/−)76/342429/415<0.000124/5421/570.7385
BCLCstage(B/C)52/366305/532<0.000146/15250/1480.6390
AFP(ng/mL)27,729.0±
154,561.1
17,735.3±
110,114.80.188648,645.45±
248,475.48
52,073.81
±
163,296.82
0.6153
DCP(mAU/mL)23,513.0±
70,955.4
14,373.38±
71,899.80.033930,379.13±
95,631.52
27,714.78
±
61,755.77
0.8773
AFP,alpha‐fetoprotein;BCLC,BarcelonaClinicLiverCancer;DCP,des‐gammacarboxyprothrom‐
bin;EHS,extrahepaticspread;PVTT,portalveintumorthrombus;HBV,hepatitisBvirus;HCV,
hepatitisCvirus;MVI,macrovascularinvasion.
3.2.OverallSurvival
Figure2A,BshowsthesurvivalcurvesfortheNew‐FPandsorafenibgroupsbefore
andafterPSM.BeforePSM,theMSTforNew‐FPandsorafenibwas17and12months,
respectively.Astatisticallysignificantdifferencewasobservedbetweenthegroups(Fig‐
ure2A,hazardratio(HR)0.68,95%confidenceinterval(CI):0.59–0.79);p<0.0001).After
PSM,theMSTsforNew‐FPandsorafenibwere18and9months,respectively,withasta‐
tisticallysignificantdifferencebetweenthegroups(Figure2B,HR0.54;95%CI0.43–0.68,
p<0.0001).
Cancers2022,14,48736of14
Figure2.OverallsurvivalcurvesforpatientsintheNew‐FPandsorafenibgroups.(A)New‐FP(n=
418,redline)andsorafenib(n=844,blueline),beforepropensityscorematching.(B)New‐FP(n=
198,redline)andsorafenib(n=198,blueline),afterpropensityscorematching.(C)Cohort1(no
MVIorEHS),New‐FP(n=38,redline)andsorafenib(n=38,blueline).(D)Cohort2(MVIwithno
EHS),New‐FP(n=78,redline),andsorafenib(n=78,blueline).(E)Cohort3(EHSwithnoMVI),
New‐FP(n=6,redline),andsorafenib(n=6,blueline).(F)Cohort4(MVIandEHS),New‐FP(n=
78,redline),andsorafenib(n=78,blueline).HR,hazardratio;MST,mediansurvivaltime;New‐
FP,fine‐powdercisplatinand5‐fluorouracil;EHS,extrahepaticspread;MVI,macrovascularinva‐
sion.
3.3.PrognosticFactors
AfterapplyingPSM,prognosticfactoranalyseswereperformedfortheentiredataset
(Table2).AChild–Pughscoreof5,thepresenceofmajorPVTT,thepresenceofEHS,the
Cancers2022,14,48737of14
bettertherapeuticresponse,andNew‐FPtreatmentwereassociatedwithpatientprogno‐
sisonunivariateanalysis.MultivariateanalysisshowedthataChild–Pughscoreof5and
New‐FPwereeachindependentbetterprognosticfactors.ThepresenceofmajorPVTT
andEHSwereindependentpoorprognosticfactors.
Table2.Univariateandmultivariateanalysesforevaluatingfactorsassociatedwithoverallsur‐
vival.
Variable
UnivariateAnal‐
ysis
(p‐Value)
MultivariateAnalysis
(p‐Value)
HazardRatio
(95%CI)
Sex(male/female)0.1681
HBV(+/−)0.3909
HCV(+/−)0.1851
Child–Pughscore(5/6)0.00020.00680.72(0.57–0.91)
BCLCstage(B/C)0.2621
MVI(+/−)0.9679
MajorPVTT(+/−)0.02130.00021.57(1.24–1.99)
EHS(+/−)<0.00010.00111.76(1.37–2.26)
AFP(≥400ng/mL/<400
ng/mL)0.1811
Bettertherapeuticre‐
sponse<0.00010.7901
Treatment(New‐FP/so‐
rafenib)0.0350<0.00010.52(0.41–0.65)
AFP,alpha‐fetoprotein;BCLC,BarcelonaClinicLiverCancer;CI,confidenceinterval;EHS,extra‐
hepaticspread;HBV,hepatitisB;HBC,hepatitisC;MVI,macrovascularinvasion;New‐FP,fine‐
powdercisplatinand5‐fluorouracil.
3.4.SubgroupAnalyses
Subgroupanalyseswereconductedintheaforementionedfivecohorts(Figure2C–
F).
3.4.1.Cohort1:NoMVIorEHS
Patientandtumorcharacteristicsforcohort1areshowninSupplementaryTableS1.
BeforePSM,therewerestatisticallysignificantdifferencesinsex,etiology,andtumorsize
betweenthetwogroups.AfterPSM,thesestatisticaldifferencesdisappeared.TheOSin‐
cludingbothgroupsincohort1was19monthsTheMSTsintheNew‐FPandsorafenib
groupswere20and17months,respectively(Figure2C).Therewasnostatisticallysignif‐
icantdifferenceinOSbetweenthem(p=0.28,HR0.71,95%CI0.39–1.32).
3.4.2.Cohort2:MVIwithoutEHS
Patientandtumorcharacteristicsforcohort2areshowninSupplementaryTableS2.
BeforePSM,therewasastatisticallysignificantdifferenceintumorsizebetweenthetwo
groups.AfterPSM,thestatisticaldifferencedisappeared.TheOSincludingbothgroups
incohort2was12monthsTheMSTsintheNew‐FPandsorafenibgroupswere19and
eightmonths,respectively(Figure2D).New‐FPstatisticallysignificantlyprolongedsur‐
vivalcomparedwithsorafenib(p<0.0001,HR0.51,95%CI0.35–0.74).
3.4.3.Cohort3:EHSwithoutMVI
Patientandtumorcharacteristicsforcohort3areshowninSupplementaryTableS3.
BeforePSM,therewerestatisticallysignificantdifferencesinageortumorsizebetween
thetwogroups.AfterPSM,thestatisticaldifferencesdisappeared.TheOSincludingboth
Cancers2022,14,48738of14
groupsincohort3was11monthsTheMSTsforNew‐FPandsorafenibwere13and7.5
months,respectively(Figure2E).TherewasnostatisticallysignificantdifferenceinOS
betweenthetwogroups(p=0.095,HR1.34,95%CI0.37–4.82).
3.4.4.Cohort4:MVIandEHS
Patientandtumorcharacteristicsforcohort4areshowninSupplementaryTableS4.
BeforePSM,therewasastatisticallysignificantdifferenceintumorsizebetweenthetwo
groups.AfterPSM,thestatisticaldifferencebetweenthegroupsdisappeared.TheOSin‐
cludingbothgroupsincohort4was7months.TheMSTsoftheNew‐FPandsorafenib
groupswere8.8monthsand4months,respectively(Figure2F).New‐FPstatisticallysig‐
nificantlyprolongedsurvivalascomparedwithsorafenib(p=0.003,HR0.50,95%CI0.31–
0.82).
3.5.AssessmentinMajorPVTT‐HCC
3.5.1.ComparisonofOSinMajorPVTT‐HCC
Incohort5,theOSofpatientswithmajorPVTT‐HCCwascomparedbetweenthe
New‐FPandsorafenibgroups.Patientandtumorcharacteristicsforcohort5areshown
inSupplementaryTableS5.BeforePSM,therewerestatisticallysignificantdifferencesin
tumorsizeandthepresenceofEHSandDCPlevelsbetweenthetwogroups.AfterPSM,
thestatisticaldifferencesbetweenthegroupsdisappeared.TheMSTsoftheNew‐FPand
sorafenibgroupswere13andsixmonths,respectively,beforeapplyingPSM(Figure3A).
TheMSTsoftheNew‐FPandsorafenibgroupswere16andsixmonths,respectively,after
applyingPSM(Figure3B).
Cancers2022,14,48739of14
Figure3.TherapeuticeffectsofNew‐FPandsorafenibinHCCwithmajorPVTT.(A)Cohort5,sur‐
vivalcurvesofpatientswithmajorPVTT‐HCCbeforepropensityscorematching:New‐FP(n=177,
blueline)andsorafenib(n=114,redline).(B)Cohort5,survivalcurvesofpatientswithmajorPVTT‐
HCCafterpropensityscorematching:New‐FP(n=78,blueline)andsorafenib(n=78,redline).(C)
TherapeuticresponseforNew‐FPinmajorPVTT‐HCC.(D)Survivalcurvesintheresponder(red
line,n=57)andnon‐respondergroups(blueline,n=21)forNew‐FP.(E)Survivalcurvesindifferent
therapeuticresponsegroupsforNew‐FP:CR(redline,n=13),PR(blueline,n=44),SD(yellowline,
n=13),andPD(greenline,n=8).CR,completeresponse;HCC,hepatocellularcarcinoma;HR,haz‐
ardratio;MST,mediansurvivaltime;PD,progressivedisease;PR,partialresponse;PVTT,portal
veintumorthrombus;SD,stabledisease.
3.5.2.ForestPlotAnalysis
Weperformedaforestplotanalysistoshedlightonthefactorsassociatedwithprog‐
nosisinpatientswithmajorPVTT‐HCC(Figure4).Sorafenib,anAFPlevelof≥400ng/mL,
Cancers2022,14,487310of14
thepresenceofEHS,thepresenceofVp4(portalveininvasioninthemaintrunk),tumor
size≥5cm,andage≥65yearswerepoorprognosticfactorsinpatientswithmajorPVTT‐
HCC.
Figure4.Forestplotanalysisforfactorsassociatedwithpoorprognosisinpatientswithmajor
PVTT‐HCC.AFP,alpha‐fetoprotein;EHS,extrahepaticspread;HCC,hepatocellularcarcinoma;
Vp4,tumorinvasionintothetrunkoftheportalvein;PVTT,portalveintumorthrombus.
3.5.3.EfficacyofNew‐FPinMajorPVTT‐HCC
DataonthetherapeuticresponsetoNew‐FPformajorPVTT‐HCCareshowninFig‐
ure3C.TheCR,PR,SD,andPDrateswere16.6%,56.4%,16.7%,and10.3%,respectively.
Theobjectiveresponseratewas73.0%,andthediseasecontrolratewas89.7%.TheMSTs
ofrespondersandnon‐responderswere23andsixmonths,respectively(p=0.0043,HR
0.48,95%CI0.29–0.79,Figure3D).TheMSTsofpatientswhoachievedCR,PR,SD,and
PDwere59,17.2,8,and4months,respectively(p<0.0001,Figure3E).
4.Discussion
ThisstudydemonstratedtheefficacyofNew‐FPundervarioustumorconditionsin
patientswithpreservedliverfunction.New‐FPwasshowntobehighlyeffectiveinpa‐
tientswithMVIregardlessofthepresenceofEHS.Intheprognosticanalysisofthewhole
datasetconductedafterapplyingPSM,thefactorsassociatedwithbetterprognosiswere
aChild–Pughscoreof5andNew‐FP,andthefactorsassociatedwithpoorprognosiswere
thepresenceofmajorPVTTandEHS.New‐FPalsoshoweddramaticefficacyinpatients
withmajorPVTT‐HCC.TheobjectiveresponseratetoNew‐FPformajorPVTT‐HCCwas
>70%,andtheMSTfortheresponderswas>20months.Notably,16.6%ofpatientswith
majorPVTT‐HCCachievedCRonapplyingNew‐FP;theMSTofthepatientswho
achievedCRwas59months.
Thisstudyisthelargestretrospectivecohortstudycomparingtheefficacyofasingle
HAICregimenandsystemictreatmentforHCCinpatientswithpreservedliverfunction.
Inthisstudy,theefficacyofNew‐FPwasdrasticallyenhancedbyexcludingpatientswith
poorliverfunction.Ueshimaetal.similarlyreportedalarge‐scaleretrospectivecohort
Cancers2022,14,487311of14
studyexaminingtheefficacyofHAICandsorafenibforHCCinpatientswithpreserved
liverfunction[18].TheHAICregimensevaluatedintheirstudyincludedcisplatinmono‐
therapy,interferon‐α+5‐FU,andlow‐doseFP;theMSTsofpatientswithHCCwithMVI
andwithoutEHSwere10.6monthsforHAICand9.1monthsforsorafenib.HAICwas
statisticallysignificantlysuperiortosorafenibaloneforMVI‐HCC.Althoughadirectcom‐
parisonbetweenthereferencedreportandthecurrentstudycannotbemade,wenotethat
theMSTforNew‐FPwassuperiortothatofHAICinthispriorstudy.Recently,ourgroup
reportedacomparativestudybetweenNew‐FPandaconventionalHAICregimenoflow‐
doseFP[19];thestudyrevealedthatNew‐FPprolongedpatientsurvivalascomparedto
low‐doseFP.TheseresultssuggestthatapplyingaHAICregimenisimportantinthe
treatmentofHCC.
Inthisstudy,New‐FPshowedstrongefficacyforMVI‐HCC,regardlessofthepres‐
enceofEHS.SystemictreatmentisrecommendedforpatientswithHCCinvolvingEHS
[20].However,thedegreeofprogressionofhepaticlesionsoftendeterminestheprognosis
ofpatientswithHCCinvolvingEHS[21].Ourpreviousreportshowedthatprimarytu‐
morstageT4wasanindependentprognosticfactorinpatientswithHCCandEHS[22].
Therefore,locoregionaltreatmentisimportantevenforHCCwithEHS.Tofindtheap‐
propriatetherapeuticstrategyforHCCwithEHS,wehavetoproperlyassesstheprogres‐
sionofhepaticlesions.Then,weneedtoselectthebesttreatment.Furtheranalysesare
neededtoclarifytheclinicalquestionregardingtreatmentforHCCwithEHS.
TheprognosisforpatientswithmajorPVTT‐HCCisextremelypoor.Forexample,
thebasalprognosisofsuchpatientsisthreemonthsforVp4andsixmonthsforVp3(right
orleftportalveininvasion)[23].Thepreviouslyreportedprognosisofpatientswithmajor
PVTT‐HCCtreatedwithsorafenibwas6.5months[24].Theprognosisforother1st‐line
systemictreatments,suchaslenvatinibandatezolizumabplusbevacizumabcombination
therapy,isalsoapproximatelysixmonths[7,25].IntheSILIUStrial,arandomizedclinical
trialcomparingtheefficacyofsorafenibandsorafenibpluslow‐doseFPinthetreatment
ofHCC,additionallow‐doseFPshowedastatisticallysignificanteffectformajorPVTT‐
HCCascomparedwithsorafenib[26];theseresearchersalsoreportedthatobjectivere‐
sponsecouldbeanindependentprognosticfactorforOS[27].Inourcurrentstudy,re‐
sponderstoNew‐FPdemonstratedlongersurvival.Surprisingly,theMSTofCRcases
reachednearlyfiveyears.Achievingatherapeuticresponseiscriticallyimportantinthe
treatmentofmajorPVTT‐HCC,andevidenceindicatesthatNew‐FPshouldbeselected
forthesepatients.
Currently,weareinaneraofsystemictreatmentsforHCC,andsequentialdrugther‐
apyhasbecomemainstream[28].However,therearemanylocoregionaltreatmentsavail‐
ableforHCCaswell.Therefore,weneedtofindanoptimaltherapeuticstrategythatcom‐
binessystemicandlocoregionaltreatments.Inthestudy,themultivariateanalysisre‐
vealedthatthepoorprognosticfactorsoftheNew‐FP/HAICgroupbeforePSMwerea
Child–Pughscoreof6,thepresenceofmajorPVTT,andEHS,respectively.Tomanagethe
patientswiththesefactors,New‐FPmonotherapymightbenotenough.Ikedaetal.re‐
portedontheusefulnessofacombinationtherapy(cisplatinmonotherapyandsorafenib)
[29].WealsopreviouslyreportedontheefficacyofcombinationtherapywithTACEor
HAICandlenvatinib[30],andKudoetal.reportedontheimportanceofconversiontreat‐
mentafteratezolizumabplusbevacizumabcombinationtherapy[31].Thesereportssug‐
gestthatmultidisciplinarytreatmentcombiningsystemicandlocoregionaltreatments,in‐
cludingHAIC,mightbethebesttherapeuticstrategyforthemanagementofadvanced
HCC.Fromthisperspective,dataavailabletodatestronglysuggestthatNew‐FP,which
demonstratesahighresponserate,canbeaneffectivechoiceintheeraofmultisystemic
treatments.
AlthoughthestudyrevealedtheeffectivenessofNew‐FPforPVTT‐HCC,thebest
treatmentforBCLC‐Bstillremainsunclear.Inthestudy,cohort1istheanalysisforBCLC‐
B.TherewasnosignificantdifferenceintheMSTsbetweenNew‐FPandsorafenib.One
ofthereasonswhythereisnodifferenceisthattumorconditionsaretooheterogeneous.
Cancers2022,14,487312of14
TACEisrecommendedforBCLC‐B.However,thesystemictreatmentisalsorecom‐
mendedforTACEunsuitablecasesinBCLC‐B.Sofar,therehavebeennoclinicaltrials
whichdirectlycomparedwithTACE,HAIC,andthesystemictreatmentinthearea.What
weknowinthetreatmentofBCLC‐Bisthatachievingcompleteresponse/cancer‐freepro‐
longssurvivalandsequentialtherapy,e.g.,TACEtosystemictreatments,TACEtoHAIC,
orHAICtosystemictreatments,canprolongthetimetoprogressiontoBCLC‐C[32].Fur‐
theranalysesareneededtofindthebesttreatmentforBCLC‐B.
Thisstudyhasseverallimitations.First,thisstudywasretrospectiveinnature.Sec‐
ond,althoughPSMwasconducted,theratiooftumorconditions(suchasinregardto
MVI)mightbefavorableforNew‐FP;therefore,weperformedsubgroupanalyses.Third,
thenumberofpatientsincohort3wasverylow.Thereisapossibilitythatselectionbias
mighthaveaffectedtheoutcomesincohort3.Additionally,thedataregardingpost‐treat‐
mentswerenotcollectedbecauseoftheissueduetothemulticenterstudy.Influenceof
post‐treatmentssignificantlyaffectspatients’survival.Toovercometheselimitations,we
needtoperformarandomizedprospectivestudytocompareNew‐FPandvariousMTAs,
includingsorafenib,inthefuture.
5.Conclusions
Inconclusion,wefoundthatNew‐FPmeaningfullyprolongedtheOSofpatients
withHCCwithpreservedliverfunction,especiallypatientswithMVI‐HCC,regardlessof
thepresenceofEHS.Moreover,New‐FPshowedstatisticallysignificantefficacyinpa‐
tientswithmajorPVTT‐HCC.WeconcludethatNew‐FPisapromisingHAICregimen
thatcanprovideachanceofsurvivalformorethanfiveyearsevenforpatientswithmajor
PVTT‐HCC.
SupplementaryMaterials:Thefollowingsupportinginformationcanbedownloadedat:
https://www.mdpi.com/article/10.3390/cancers14194873/s1,TableS1:Patientcharacteristicsbefore
andafterpropensityscorematchingincohort1,TableS2:Patientcharacteristicsbeforeandafter
propensityscorematchingincohort2,TableS3:Patientcharacteristicsbeforeandafterpropensity
scorematchingincohort3,Patientcharacteristicsbeforeandafterpropensityscorematchingin
cohort4,Patientcharacteristicsbeforeandafterpropensityscorematchingincohort5.TableS4:
Patientcharacteristicsbeforeandafterpropensityscorematchingincohort4,TableS5:Patientchar‐
acteristicsbeforeandafterpropensityscorematchingincohort5.
AuthorContributions:Datacuration,H.N.,K.U.,J.T.,T.K.(TeijiKuzuya),K.K.,Y.K.,A.H.,R.S.,
T.Y.,S.T.,A.D.,S.S.,T.S.,M.S.,H.S.andE.M.;conceptualizationandwriting—originaldraftprepa‐
ration,H.I.;supervision,T.N.,H.K.,T.T.andT.K.(TakumiKawaguchi).Allauthorshavereadand
agreedtothepublishedversionofthemanuscript.
Funding:H.I.waspartlygrantedfromtheTakedaScienceFoundation,theShinnihonFoundation
ofAdvancedMedicalTreatmentResearch,andtheYasudaMedicalfoundation.
InstitutionalReviewBoardStatement:ThestudyprotocolwasapprovedbytheEthicsCommittee
oftheKurumeUniversitySchoolofMedicine(No.19004).Theethicalapprovednumbersineach
facilityareshownbelow.No.31‐9intheEhimePrefecturalCentralHospital,2019‐0159intheFujita
HealthUniversity,2021‐159inKagawaUniversity,19064intheOsakaNationalHospital,2019‐13
intheNationalHospitalOrganizationKyushuCancerCenter,H18‐154inJuntendoUniversity.Ad‐
ditionally,theopt‐outagreementregardingthestudyispresentedinthehomepageoftheKurume
UniversitySchoolofMedicine,inwhicharedescribedallfacilitiesregisteredinthestudy.
InformedConsentStatement:Allproceduresfollowedwereinaccordancewiththeethicalstand‐
ardsoftheresponsiblecommitteeonhumanexperimentation(institutionalandnational)andwith
theHelsinkiDeclarationof1975,asrevisedin2008.Therequirementforwritteninformedconsent
waswaivedowingtotheretrospectivestudydesign.
DataAvailabilityStatement:DataarecontainedwithinthearticleorSupplementaryMaterials.
Acknowledgments:TheauthorsthankthemembersoftheKurumeLiverCancerStudyGroupof
JapanandtheNew‐FPStudyGroup.HironoriKogaisarepresentativeofthisgroup.
Cancers2022,14,487313of14
ConflictsofInterest:Theauthorsdeclarethattheyhavenoconflictofinterest.
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