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PILOTSTUDYOFUPTAKEOFLONGCHAINFATTYACIDSFROMALGALOILCONSUMEDINGELCAPAND
LIPOSOMALBEVERAGEFORM
OVERVIEWOFSTUDYRESULTS
JULY9,2019
OVERVIEWOFSTUDYRESULTS
PILOTSTUDYOFUPTAKEOFLONGCHAINFATTYACIDSFROMALGALOILCONSUMEDINGELCAPANDLIPOSOMALBEVERAGEFORM
Background:
Longchainomega-3fattyacids(EPAandDHA)asnaturaltriglyceridesfromoilyfishareessentiallycompletelybio-available,estimatedat90–95%.Thefatemulsiondropletsfromthisformareaboutonemicronindiameter
Dietarysupplementformscomeasnaturaloiltriglycerideorinare-esterifiedformastheethylesterorastriglyceridesenrichedinEPAandDHA.Severalfactorsaffecttheavailabilityoftheomega-3fromthesesupplements,includingthespecificmolecularform,whetherornotconsumedwithfood(andthefood’sfatcontent),andthemannerandextentofdispersionoftheomegainthesupplementmatrix.Inaddition,thereissignificantvariabilitybetweenindividuals.
StudyDesignforOmega-3TriglyceridesfromAlgalOil(uncontrolled)
HMRI(Pasadena,Dr.MichaelHarringtonPI)recruited31studyparticipantsonconsent#27197foralongchainfattyacidplasmaPKstudy.Allparticipantswerehealthynon-obeseadultswhowerenottakingomega-3supplementsorprescriptionmedications.Withinformedconsent,individualsparticipatedinan8-hourstudyandwererandomlyallocatedtooneofthetreatmentgroups,eachwiththesameoverallquantityofDHA/EPA.Onegroupreceivedaliposomepreparation,theothercommercialGELCAPS.Thetwogroupswerefoundtobematchedbyage,sex,andBMI.Theycommencedthestudyafteranovernight(12h)fastat8am.Afterabaselineblooddraw,theywereallgivenalowfatbreakfastat9am,followedbylunchatnoon.
Thefollowingprocedurewasemployed:
• Intravenouslineinserted• 2mLofvenousbloodatbaseline• Drinkliposomebeverage(nof15)orswallowgelcap(nof15).• Combined(EPA+DHA)dose900mgineachcase• ThealgaloilinbothformswasDSM“Life’sOmega45”• Hourlybloodcollectionsof2mLto8hours• Separateandaliquotplasmasamples,into100ulcontainers,andfreeze(-80C)• Assayfattyacidsbyextraction,derivatizationandGCMS
SummaryofResults
Figures1and2showallthedataforincreaseabovebaselineforEPAandDHAconcentrationsinplasmainug/ml.Theleftportionofeachchartshowstheliposomeformdataandtherightportiontheresultsforgelcaps.Thearrowineachpanelshowsthedivisionbetweengroups.Eachparticipantisrepresentedbynineconsecutivedatapoints(baselineto8hours)startingwithafattyacidconcentrationchangeof
zero;dataareshownconsecutivelywitheach“hump”inthecharteffectivelyshowingresultsforoneindividual.Ofthe31individuals,datawereanalyzedfor28,fourteenineachgroup.Baselineplasmasampleswereinadvertentlypooledforthreesubjectsandplasmalevelchangesrelativetobaselinecouldthusnotbeevaluated.Thechartsshowthesesubjectsasbaseline(zero)valuesforalltimepoints.Astrikinglyanomaloushighearlyvalue(bothDHAandEPA)wasobserved,andconfirmed,foronegelcapsubject.Insomeanalysesthisvaluewasexcluded.
AnalysisofpercentchangeoverbaselineforthetotalofEPA+DHAisshowninFigure3forthegelcapandliposomegroups.Dataareshownasmeanwithstandarderrorastheerrorbar.Forcomparison,peak(Cmax)dataforLovaza(purifiedethylesterformfromfishoil),dosedat3.6gEPA+DHA,isshownattheappropriatetimepoint(6hours)Harrisetal(2103),asisacalculatedfour-foldlowervaluefor0.9gdose.Withnumerouscaveats,adosecorrected(arithmetic)crossstudycomparisonsuggeststhealgaloilgivesbetteruptake(Cmaxratio)byaboutafactorof3ingelcapsandbetweenfourandfivefortheliposomalpresentation.
Forabsolute(ug/ml)increasesinEPAandDHAinplasmatheaverageddatafortheindividualsineachofthetwogroupsareshowninFigures4and5(meanwithSEMerrorbars).Theliposomalformshowsabouta35%enhancementforEPAandalmost80%enhancementforDHA,whetherassessedbyCmaxorAUCto8hours.
Evenintheaverageddatacharts,itisclearthatthereisamorerapidappearanceoftheEPAandDHAinplasmafromtheliposomalpresentation.ForindividualsubjectsthelinearregressionanalysisofinitialslopeforEPAandDHArisetoCmaxinplasmaareshowninFigures6and7,withaveragesshownasthedashedline.Allratesareshownasug/ml/hour.ForEPAandDHA,respectively,therateofappearanceis1.4andalmost3timesgreater.Inthisanalysis,thenon-responderswereexcludedfromeachgroup–theseindividualsarereadilyapparentinFigures1and2.Notrevealedbythesegraphsisthelagtimeseenforsomeofthegelcaprecipientsforwhomanysignificantriseinplasmadoesnotbeginuntilhour2.Thislagis,however,visibleinplotsofthepercentchangeoverbaselinefor(EPA+DHA)forindividuals.TheseareshowninFigures8and9thatincludeexpandedplotsfortheinitialuptakeperiod.Changeoverbaselineattwohoursislessthan10%for6of14GelCapconsumers(andlessthan20%for10ofthe14).Incontrastfortheliposomegrouponlytwoindividualshadalessthan10%risebytwohours(andthreelessthan20%atthesametimepoint).Whilethe10%and20%thresholdsarearbitrary(butrelatetotheCVofabout10%fortheassaymethod),thefractional“delayed-response”toomega-3dosingisaquantitativeindicatorofthecleardifferenceinlagseenforthedifferentdosageforms.
Overall,thereisnocorrelationofuptakewithage,sex,weightBMIetc.Whilethisstudyonlyhas14individualsineachgroup,thedatahintatadependenceofpeakplasmalevelandAUC(8hrs)onthebaselinetotalfattyacidlevelinindividualsconsumingtheliposomalform.Suchadependenceappearsessentiallyabsentforgelcapconsumers.Figures10-13.Thismayreflectanatural(baseline)digestiveefficiencyfortriglyceridesthatcorrelateswithhigherbaselinefattyacidlevels.Thatefficiencyispotentiallyimmediatelyaccessibleforprocessingthehighlydigestibleliposomepresentationofomega-3triglycerides(inthenaturalmoleculardispersioninphospholipids).Itdoesnotfactorintodigestionof
thegelcapsforwhichtriglyceridesarriveintheduodenuminmuchlargerfatemulsiondropletsinchyme.
AsshowninFigure14,baselinetotalfattyacidlevelswererandomlydistributedbetweenthetwogroups
Context
Thereisverylimitedinformationaboutthequantitativeextentofuptakeforomega-3supplements,i.e.fractionofthedosegiventhatisabsorbed.ThekeystudiesarebyLawsonandHughes1988(a)whousedlinseedoilasaninternalstandardfor“naturaluptake”.Thoseauthors’workincludedassessmentoftheeffectofahighfatmeal(44gfat)consumedwiththeomega-3productLawsonandHughes1988(b).DatafromthosestudiesarereferencedtotheCmaxforlinseedoilas100%,butthenaturaluptakeofdietaryfatisknowntobebetween90%and95%.ThedatafromLawsonandHughesarepresentedinFigure15below,correctedto92.5%uptakefordietarytriglycerides(illustratedhereforsalmon).TheadditionoffatapproximatelytriplesuptakeforethylesterformsofEPAandDHA.ForthetriglycerideformhigheruptakeforbothEPAandDHAisseeninthelowfatcase.However,foradditionoffattheEPAuptakeapproachesthatseenfordietaryfatswhereastheDHAuptakeislargelyunchanged.Theadditionoffatispresumedtostimulatethedeploymentoflipases,bilesaltsandphospholipidstoboostdigestion.Ethylestersareknowntobelessreadilycleavedthantriglyceridesbypancreaticlipasesandthusshowahigherresponsetothisdigestiveboost.Forthetriglycerides,susceptibilitytoenzymatichydrolysishasbeenpostulatedtorelatetodifferentialpositionaldistributionofEPAandDHAonglycerol,aswellasapotentialeffectoftheadditionaldoublebondclosetotheesterlinkageforDHA.
Thereareotherstudies,someathigherdoses,thatsuggesttheethylestersandtriglyceridesgivesimilarplasmaincreasesfortheselongchainfattyacids.TheassumptionweuseisthatinthemoderatedoserangeweandLawsonandHugheshavestudied(lessthan1.7gramEPA+DHA)thetriglyceridesprovideaboutthreetimestheplasmariseasethylesters.ApplyingtheratioforindividualCmax(EPAandDHAabsoluteincreaseoverbaseline)forliposomes(vsgelcaps)fromFigures4and5providestheprojectedextentofliposomaluptakeforboththesefattyacidsasalmostthatofdietarytriglycerides.ThealternativecalculationusingratiosofpercentincreaseoverbaselineofcombinedEPA+DHAtotheethylesterdataofHarrisetal(2013)(Figure3)givesconsistentEPA+DHAcompositeresultsforgelcapsandliposomesshownbythegreenverticalarrowsinFigure15
Conclusion
Itisnotnecessarytotakehighpotencytriglycerideformgelcapswith300+caloriesoffat(a44gfatmeal
=1.25ozbutter!)fornatural,dietarytriglyceride,uptakeofEPA.Further,theliposomescanimprove
DHAuptakeinawaythatevenahighfatmealcannot.Theliposomalbeveragecanprovideessentially
naturaluptakelevelsofbothlongchainomega-3fattyacidswitharelativelyrapidrisetopeakplasma
levelsafterconsumption.
Figure1:ChangeinEPAconcentrationinplasma–alldata
Figure2:ChangeinDHAconcentrationinplasm
a–alldata
Figure3:Percentchangein(EPA+DHA)inplasm
a
2.9x
4.7x
Figure4:AbsoluteincreaseinEPAinplasma
Figure5:AbsoluteincreaseinDHAinplasm
a
Figure6:EPArateofincreasetoCmaxinplasm
a
Liposom
es:GelCaps1.44x
Figure7:DHArateofincreasetoCm
axinplasmaAllratesareshow
nasug/ml/hour.
Liposomes:GelCaps2.95x
Figure8(a):RateofuptakeGelCap(EPA+DHA)percentincreaseinplasm
aoverbaseline
Figure8(b):expanded-initial3hoursAtt=2hours:6/14show
<10%changeoverbaseline
10/14show<20%
changeoverbaseline
Figure9(a):RateofuptakeLiposomes(EPA+DH
A)forindividuals.
Figure9(b):expandedAtt=2hours:2/14show
<10%changeoverbaseline
3/14show<20%
changeoverbaseline
Figure10:GelCapsAUCvsbaselinetotalfattyacid
Figure11:GelCapsCmaxvsbaselinetotalfattyacid
.
Figure12:LiposomesAUCvsbaselinetotalfattyacid
Figure13:LiposomesCm
axvsbaselinetotalfattyacid.,
Figure14:Baselinetotalfattyaciddistributionbygroup
Figure15:Bioavailability.,