trends in performance enhancing drugs
TRANSCRIPT
Trends in Performance Enhancing Drugs
Schoen W. Kruse, Ph.D. Assistant Dean, Associate Professor of Pharmacology Kansas City University
SessionObjec,vesA/erpar,cipa,onintheTrendsinPerformanceEnhancingDrugssession,youwillbeableto:
1. Compareandcontrastthecommonperformanceenhancingdrugs.2. Compareandcontrastthemechanismsofac,onandadverseeffectsofcommon
performanceenhancingdrugs.3. Describetheassociatedrisksofperformanceenhancingdrugsandheatillness.
Togainacompe,,veadvantage…• HormonalPEDs
• Anabolicsteroids,growthhormone,erythropoie,n
• Non-hormonalPEDs• S,mulants,recrea,onaldrugs,nutri,onalsupplements,energy
beverages
• Maskingagents-hidetheuseofhormonalandnon-hormonalPEDs
HormonalPEDsforstrength1976-TheInterna,onalOlympicCommiPee(IOC)banstheuseofsteroids.
Theuseofandrogenshasspreadfromcompe,,vesportstoleisureandfitnesssports
Bodybuildersandnon-athletesuseandrogensasastrategytoincreasemusclemass,improveperformance,andenhancephysicalaPrac,veness
Meta--analysisof187studies,theoverallgloballife,meprevalencerateofanabolicsteroidusewas3.3%:6.4%inmen,1.6%inwomen
In2013,theCDCreportedthat3.2%ofhighschoolstudentshadtakenananabolicsteroidwithoutadoctor'sprescrip,onatleastonce
AnabolicsteroidsAnabolicSteroids–agonistsatandrogenreceptors• S,mulatesproteinsynthesis,bonegrowth,adiposecatabolism
• Increaseleanmusclemassandstrength
• Majormooddisorders,aggressivebehavior,hypogonadism,gynecomas,a
• Noeffectonaerobicpower,aerobiccapacity,athle,cism
Mostcommonlyusedandrogensaretestosterone,stanozolol,nandrolone,trenbolone,andboldenone(aveterinarysteroid)
Androgenprecursors• Androstenedioneanddehydroepiandrosterone(DHEA)
SARMs–selec,veandrogenreceptormodulators• Noneapprovedforhumanuseinanycountry
humanchorionicgonadotropin(hCG)SERMs(tamoxifen,raloxifene)Aromataseinhibitors(anastrozole)
Anabolicsteroids
Increaseserumtestosteroneconcentra,ons
Growthhormone,IGF-1andinsulinHumanGrowthHormone(hGH)• Cleareffectsonbodycomposi,on(moremuscle,lessfat)• Releasedfrompituitaryandac,vatesreleaseofIGF-1• Whencombinedwithtestosteronethereisagreater
performanceenhancingeffectthaneitheralone• Effectsdisappear6weeksa/erdiscon,nua,on• Adverseeffectsincludeinsulinresistance,hyperglycemia,
diabetes,sodiumreten,on,hypertension,cardiomegaly,prematureepiphysealclosure
• Detectedinbloodbecauselessthan0.1%isexcretedintheurine
Growthhormone,IGF-1andinsulinInsulin-LikeGrowthFactor(IGF-1)• EffectssimilartohGH;hypoglycemia• Commerciallyavailablerecombinantform• Onlydetectedthroughbloodbutnocommerciallyavailablescreeningtests
Insulin• Hypoglycemia• Canbedetectedinurinebutdifficulttodis,nguishhumaninsulin,insulinanalogs,and
porcineinsulin
RatesofIGF--1andinsulinuseforperformanceenhancementarelowerthangrowthhormone
HormonalPEDsforenduranceWhy• Maximalaerobicpower• Anaerobiccapacity• Aerobic/anaerobicmetabolicefficiency
How• Hemoglobin(RBC)volumeexpansion
HormonalPEDsforenduranceAthleteshaveusedmethodstoincreasetheoxygen--carryingcapacityofthebloodandtherebyathle,cperformancefordecades
Trainingathighal,tude
Transfusions
Erythropoie,ntos,mulateerythropoiesis
Oxygen-hemoglobinrela,onshipOxygentransportsystem• Themainfunc,onistotransportoxygen• Hemoglobinisatetramercomposedof4globinmolecules• 2alphaglobinsand2betaglobins
• Onehemoglobinmoleculehastheabilitytotransportupto4oxygenmoleculesboundtoferri,n
Increasetheblood’smaximumcapacitytotransportandu,lizeoxygen
Increaseaerobicpowerandphysicalexercisetolerance
Erythropoie,nuseinblooddopingErythropoie,n(EPO)• Proteinhormonesecretedbythekidneys• S,mulatesRBCproduc,on• Increasesbothmaximalaerobicpowerand
capacity• Indicatedforuseinanemiaofchronicdisease• Majoradverseeffectsofincreased
erythropoiesisincludemyocardialinfarc,on,stroke,thromboembolicdisease,andhypertension
• Numerousdetec,onmethods(directandindirect)
Erythropoie,nuseinblooddopingCERA-Con,nuousErythropoie,nReceptorAgonist• ApprovedforuseinEuropeandUSbutunavailableheredueto
legalissues• Aseffec,veaserythropoie,natmaintaininghemoglobinlevels
Transfusion• Wholeblood• Perfluorocarbons–liquidbreathing
• Synthe,cormodifiedhemoglobinandliposome-encasedhemoglobin
• Developedforprematureinfantswithrespiratorydeficits
Togainacompe,,veadvantage…• HormonalPEDs
• Anabolicsteroids,growthhormone,erythropoie,n
• Non-hormonalPEDs• S,mulants,recrea,onaldrugs,nutri,onalsupplements,energy
beverages
• Maskingagents-hidetheuseofhormonalandnon-hormonalPEDs
S,mulantsAmphetamineD--methamphetamineEphedrineCaffeineMethylphenidatePseudoephedrineDimethylamylamine(DMAA)
• S,mulantsareknowntobebothphysicalandcogni,veperformanceenhancers.• S,mulantsdecreaseappe,te,increaseenergy,improveendurance,increaseanaerobic
performance,decreasefeelingsoffa,gue,improvereac,on,me,increaseconcentra,on,improveworkingmemory,increasealertness,andcanleadtoweightloss
CocaineFenfluraminePemolineSelegilineSibutramineStrychnineModafinil
S,mulantsCatecholamines• PrimaryneurotransmiPersofthesympathe,cnervoussystem
• Epinephrine(adrenaline),norepinephrine(noradrenaline),dopamine
• Causegeneralphysiologicalchangesthatpreparethebodyforphysicalac,vity(fightorflightresponse)
• Releasedbytheadrenalglandduringperiodsofstress,bothpsychological(chasedbyabear)andphysiological(e.g.,lowbloodsugarlevels)
S,mulants–catecholaminesExogenoussourceshavethesameeffectsasendogenouscompounds(increasedsympathe,ctone)• Increasedheartrateandcardiacoutput• Prolongedrunning,metoexhaus,on• Decreasedcentralfa,gue• Improvedreac,on,me• Cogni,vefunc,onduringsleepdepriva,on
Noimprovementinaerobiccapacityorrunningspeed
Amphetamine,methylphenidate,DMAA• CommonlyusedforthetreatmentofADHD
• DMAA(1,3--dimethylamylamine)isanamphetaminederiva,vethatiswidelyusedinsportssupplementssoldintheUnitedStates
Ephedrine,pseudoephedrineEphedrineisanagonistatbothαandβreceptors;alsoenhancesreleaseofNEfromsympathe,cneurons
Marketedasadietarysupplement;bannedbytheFDAduetoriskofheartaPackandstroke
Cocaine
Blocksnorepinphrineanddopaminetransporters
Increasesnorepinephrine,dopamine,andserotonininsynapses
Caffeine• Nonspecificinhibitorofphosphodiesteraseenzyme(PDE1-5)• Increasestheconcentra,onofcAMP• cAMPincreasesstrengthofcontrac,onincardiacmuscleandrelaxes
smoothmusclesurroundingthevasculature• Enhancesprolongedandshorter,intenseac,vity• Caffeinatedproductsareo/enusedtoimproveathle,cperformance,as
wellasincreasealertnessinnon-spor,ngevents• CaffeinehasurinarythresholdssetbytheInterna,onalOlympic
CommiPee(IOC)andNa,onalCollegiateAthle,cAssocia,on(NCAA)
Non-hormonalPEDsthatimpactstrengthCrea,ne• ProvidesanATPsourcetomuscle• Increasesintracellularvolume
• Resultsin“hypertrophy”ofmuscle,ssue• Variabilitywithresponders&nonresponders
Beta-2AdrenergicAgonists• Wheninjectedortakenorallycanhaveanaboliceffectandreducebodyfat• Preventsmusclelossa/ercessa,onofanabolicsteroids(Clenbuterol,
Terbutaline,Salbutamol,Fenoterol)• NCAAandUSOConlyallowwithprescrip,on
Togainacompe,,veadvantage…• HormonalPEDs
• Anabolicsteroids,growthhormone,erythropoie,n
• Non-hormonalPEDs• S,mulants,recrea,onaldrugs,nutri,onalsupplements,energy
beverages
• Maskingagents-hidetheuseofhormonalandnon-hormonalPEDs
MaskingAgentsDiure,cs• Quicklydecreasesbodymass(sportswithweightrestric,ons)• Altersnormalurinaryexcre,onofperformance-enhancingdrugs
Probenecid• Inhibitsthereabsorp,onofuricacidattheproximalconvolutedtubule• Delaysrenalexcre,onoftestosterone
Epitestosterone• Co--administeredwithtestosteronetonormalizeurinetestosterone/
epitestosteronera,o
ExerciserelateddeathsDemandsofsportmayplaceathletesinextremeweathercondi,onsandtaxtemperatureregulatorysystems
Medicalcondi,oncouldlowerthethresholdoftemperaturecontrol
Physiologicaltera,onsenhanceriskforpoten,allylethalarrhythmias
• Bloodvolume• Dehydra,on• Electrolyteabnormali,es
Medica,oncould,pthebalance
100%preventable
HeatIllness-SymptomsFirstStage
SecondStage
• Headache• Dizziness
• Fa,gue• Irritability
• Anxiety• Chills
• Nausea• Vomi,ng
• Heatcramps
• Confusion–alteredmentalstatus• Increasedbodytemperature(may
beasymptoma,cinhealthyathletes
• RapidPulse• Hyperven,la,on• LowBloodPressure,syncope• Piloerec,on
LateStages • Markedlyincreasedbodytemperature• Greaterthan41°C(106°F)• Lackofcoolingdespitestoppingexercise
• Profuseswea,ngthatceasesdespitehighbodytemperature
Heatdissipa,onBloodvolumeCardiacoutputStrokevolume
HeartrateMuscleglycogenuseLac,cacidOnsetoffa,gue
Coretemp.Dehydra<on
MuscleEnduranceAerobicPowerWorkCapacityMentalAcuity
Effects
Results
RiskforheatillnessRiskforheatillness Notes
Anabolicagents Lowrisk MaycauseHTN;drugstotreatmayincreaseriskCrea,ne–dehydra,onandacuteinters,,alnephri,smayincreaserisk
Hematopoie,cagents
Lowrisk Canleadtohypertension,heartdisease,heatstroke,seizures,embolism
Sympathomime,cs Highrisk Increasedsympathe,ctone• Tachycardia• Hypertension• Decreasescutaneousbloodflowandimpairedheatdissipa,on
Maskingagents Moderaterisk Contributetophysiologicaltera,ons(e.g.,dehydra,on,electrolytechanges,decreasedbloodvolume)placingatriskforlethalarrhythmias
SessionObjec,vesA/erpar,cipa,onintheTrendsinPerformanceEnhancingDrugssession,youwillbeableto:
1. Compareandcontrastthecommonperformanceenhancingdrugs.2. Compareandcontrastthemechanismsofac,onandadverseeffectsofcommon
performanceenhancingdrugs.3. Describetheassociatedrisksofperformanceenhancingdrugsandheatillness.
References
1. hPp://www.cnn.com/2013/06/06/us/performance-enhancing-drugs-in-sports-fast-facts/2. www.uptodate.com3. Katzung,BGandTrevor,AJ.BasicandClinicalPharmacology.13thEd.McGrawHill.2015.4. LaurenceL.Brunton,BruceA.Chabner,BjörnC.Knollmann.GoodmanandGilman’sThe
pharmacologicalbasisoftherapeu;cs,12thEd.McGrawHill,2011.