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Increasing Access and Futureproofing PET Radiopharmaceutical Manufacturing in Nuclear Medicine, and the Role of Theranostic Pairs.
Increasing Access and Futureproofing PET Radiopharmaceutical Manufacturing in Nuclear Medi...
Increasing Access and Futureproofing PET Radiopharmaceutical Manufacturing in Nuclear Medicine, and the Role of Theranostic Pairs.

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자료유형  
 학위논문(국외)
기본표목-개인명  
표제와 책임표시사항  
Increasing Access and Futureproofing PET Radiopharmaceutical Manufacturing in Nuclear Medicine, and the Role of Theranostic Pairs.
발행, 배포, 간사 사항  
[S.l.] : University of Michigan. , 2025
    발행, 배포, 간사 사항  
    Ann Arbor : ProQuest Dissertations & Theses , 2025
      형태사항  
      562 p.
      일반주기  
      Source: Dissertations Abstracts International, Volume: 87-03, Section: B.
      일반주기  
      Advisor: Scott, Peter J. H.
      학위논문주기  
      Thesis (Ph.D.)--University of Michigan, 2025.
      요약 등 주기  
      요약Approval of radiotherapies, Lu-177 DOTATATE (Lutathera) for neuroendocrine tumors and Lu-177 PSMA-617 (Pluvicto) for prostate cancer, has increased demand for positron emission tomography (PET) imaging agents. Since PET radiopharmaceuticals are manufactured on-demand (due to half-life of the isotope), reproducible and optimized workflows are required. The goal of this dissertation is to optimize gallium-68 (Ga-68) production, and futureproof carbon-11 (C-11) and fluorine-18 (F-18) radiopharmaceutical production to increase access to these PET agents so patients can be referred for treatment with appropriate therapeutic agents without delay. Additionally, by monitoring response to approved radiotherapies (Lutathera, and Pluvicto), future theranostic pairs (a diagnostic agent pair with a therapeutic agent) can be developed. Initial work optimized the routine production of Ga-68 DOTATATE (NETSpot) and Ga-68 PSMA-11 (Locametz and Illuccix) at the University of Michigan using commercial 68Ge/68Ga generators. Comparing Locametz and Illuccix demonstrated both kits to be equivalent with comparable clinical images. From this work, a recommendation that nuclear medicine departments should use Locametz as it aligns with generator-based production workflow, and that PET manufacturers use Illuccix as cyclotron-based production of Ga-68 can act as an alternative to generator-based production. Subsequently, development of a fractional elution protocol for purifying cyclotron produced gallium-68 led to the labeling of NETSpot, and Illuccix kits with radiochemical purity (RCP) 95%.Formulation and development of research kits, including labeling of AE105, FAPI-04, and pentixafor, increased access to new imaging agents and targets (urokinase plasminogen activator receptor, fibroblast activation protein, chemokine receptor 4) of interest in oncology and/or cardiology. The translation of 14 carbon-11 radiopharmaceuticals (C-11 choline, C-11 Pittsburgh compound B, C-11 PE2i, C-11 carfentanil, C-11 methionine, C-11 sarcosine, C-11 raclopride, C-11 dihydrotetrabenazine, C-11 flumazenil, C-11 butyrate, C-11 butanol, C-11 acetate, C-11 acetyl acetate, C-11 glycine) from fixed-tube to cassette-based synthesizers (FASTLab) using resin, reactor, or loop-based techniques, with various carbon-11 synthons (methyl iodide, methyl triflate, carbon dioxide, carbon monoxide, cyanide) demonstrated the robustness of the FASTLab and futureproofing radiopharmaceutical production from a regulatory perspective. All 14 radiopharmaceuticals had RCP 90%, with comparable radiochemical yields to established syntheses using fixed-tube synthesizers. Additionally, F-18 fluorocholine and F-18 fluorodeoxyglucose were synthesized using class III solvents, improving safety by reducing the risk for elevated residual solvents. This proof-of-concept optimization can be further explored using other fluorine-18 radiopharmaceuticals to increase access in the future. Finally, the safety of radiotherapeutic agents used at the University of Michigan were reviewed to establish real world safety profile following FDA approval of carefully controlled clinical trials. Lutathera was demonstrated to be safe and effective. When adverse events were mild, dose reduction or cycle delay led to improved tolerance to therapy. Although dose reduction led to a greater increase in completing of all 4 cycles of therapy, cycle delay may be necessary when transient neutropenia, or thrombocytopenia is observed. Patients on Lutathera had an 8.4 mL/min decline in glomerular filtration when compared to control (4 mL/min) over 4-years, suggesting potential risk for long-term renal toxicity, requiring further investigation. Additionally, understanding molar activity effects in therapeutic doses, low Pluvicto uptake can be investigated to develop personalized dosing schedules. Commercial vials indicated molar activity of 2700-5730 Ci/mmol. Understanding posology on therapy completion, molar activity effects, and potential short-term and long-term adverse events, will help guide the development of future theranostic pairs, improving therapy compliance and patient outcomes.
      주제명부출표목-일반주제명  
      주제명부출표목-일반주제명  
      주제명부출표목-일반주제명  
      비통제 색인어  
      비통제 색인어  
      비통제 색인어  
      비통제 색인어  
      비통제 색인어  
      비통제 색인어  
      부출표목-단체명  
      University of Michigan Medicinal Chemistry
        기본자료저록  
        Dissertations Abstracts International. 87-03B.
        전자적 위치 및 접속  
         원문정보보기

        MARC

         008260219s2025        us  ||||||||||||||c||eng  d
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        ■020    ▼a9798291567036
        ■035    ▼a(MiAaPQ)AAI32271871
        ■035    ▼a(MiAaPQ)umichrackham006326
        ■040    ▼aMiAaPQ▼cMiAaPQ
        ■0820  ▼a616
        ■1001  ▼aWang,  Ivan  E.
        ■24510▼aIncreasing  Access  and  Futureproofing  PET  Radiopharmaceutical  Manufacturing  in  Nuclear  Medicine,  and  the  Role  of  Theranostic  Pairs.
        ■260    ▼a[S.l.]▼bUniversity  of  Michigan.  ▼c2025
        ■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
        ■300    ▼a562  p.
        ■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-03,  Section:  B.
        ■500    ▼aAdvisor:  Scott,  Peter  J.  H.
        ■5021  ▼aThesis  (Ph.D.)--University  of  Michigan,  2025.
        ■520    ▼aApproval  of  radiotherapies,  Lu-177  DOTATATE  (Lutathera)  for  neuroendocrine  tumors  and  Lu-177  PSMA-617  (Pluvicto)  for  prostate  cancer,  has  increased  demand  for  positron  emission  tomography  (PET)  imaging  agents.  Since  PET  radiopharmaceuticals  are  manufactured  on-demand  (due  to  half-life  of  the  isotope),  reproducible  and  optimized  workflows  are  required.  The  goal  of  this  dissertation  is  to  optimize  gallium-68  (Ga-68)  production,  and  futureproof  carbon-11  (C-11)  and  fluorine-18  (F-18)  radiopharmaceutical  production  to  increase  access  to  these  PET  agents  so  patients  can  be  referred  for  treatment  with  appropriate  therapeutic  agents  without  delay.  Additionally,  by  monitoring  response  to  approved  radiotherapies  (Lutathera,  and  Pluvicto),  future  theranostic  pairs  (a  diagnostic  agent  pair  with  a  therapeutic  agent)  can  be  developed.  Initial  work  optimized  the  routine  production  of  Ga-68  DOTATATE  (NETSpot)  and  Ga-68  PSMA-11  (Locametz  and  Illuccix)  at  the  University  of  Michigan  using  commercial  68Ge/68Ga  generators.  Comparing  Locametz  and  Illuccix  demonstrated  both  kits  to  be  equivalent  with  comparable  clinical  images.  From  this  work,  a  recommendation  that  nuclear  medicine  departments  should  use  Locametz  as  it  aligns  with  generator-based  production  workflow,  and  that  PET  manufacturers  use  Illuccix  as  cyclotron-based  production  of  Ga-68  can  act  as  an  alternative  to  generator-based  production.  Subsequently,  development  of  a  fractional  elution  protocol  for  purifying  cyclotron  produced  gallium-68  led  to  the  labeling  of  NETSpot,  and  Illuccix  kits  with  radiochemical  purity  (RCP)    95%.Formulation  and  development  of  research  kits,  including  labeling  of  AE105,  FAPI-04,  and  pentixafor,  increased  access  to  new  imaging  agents  and  targets  (urokinase  plasminogen  activator  receptor,  fibroblast  activation  protein,  chemokine  receptor  4)  of  interest  in  oncology  and/or  cardiology.  The  translation  of  14  carbon-11  radiopharmaceuticals  (C-11  choline,  C-11  Pittsburgh  compound  B,  C-11  PE2i,  C-11  carfentanil,  C-11  methionine,  C-11  sarcosine,  C-11  raclopride,  C-11  dihydrotetrabenazine,  C-11  flumazenil,  C-11  butyrate,  C-11  butanol,  C-11  acetate,  C-11  acetyl  acetate,  C-11  glycine)  from  fixed-tube  to  cassette-based  synthesizers  (FASTLab)  using  resin,  reactor,  or  loop-based  techniques,  with  various  carbon-11  synthons  (methyl  iodide,  methyl  triflate,  carbon  dioxide,  carbon  monoxide,  cyanide)  demonstrated  the  robustness  of  the  FASTLab  and  futureproofing  radiopharmaceutical  production  from  a  regulatory  perspective.  All  14  radiopharmaceuticals  had  RCP    90%,  with  comparable  radiochemical  yields  to  established  syntheses  using  fixed-tube  synthesizers.  Additionally,  F-18  fluorocholine  and  F-18  fluorodeoxyglucose  were  synthesized  using  class  III  solvents,  improving  safety  by  reducing  the  risk  for  elevated  residual  solvents.  This  proof-of-concept  optimization  can  be  further  explored  using  other  fluorine-18  radiopharmaceuticals  to  increase  access  in  the  future.  Finally,  the  safety  of  radiotherapeutic  agents  used  at  the  University  of  Michigan  were  reviewed  to  establish  real  world  safety  profile  following  FDA  approval  of  carefully  controlled  clinical  trials.  Lutathera  was  demonstrated  to  be  safe  and  effective.  When  adverse  events  were  mild,  dose  reduction  or  cycle  delay  led  to  improved  tolerance  to  therapy.  Although  dose  reduction  led  to  a  greater  increase  in  completing  of  all  4  cycles  of  therapy,  cycle  delay  may  be  necessary  when  transient  neutropenia,  or  thrombocytopenia  is  observed.  Patients  on  Lutathera  had  an  8.4  mL/min  decline  in  glomerular  filtration  when  compared  to  control  (4  mL/min)  over  4-years,  suggesting  potential  risk  for  long-term  renal  toxicity,  requiring  further  investigation.  Additionally,  understanding  molar  activity  effects  in  therapeutic  doses,  low  Pluvicto  uptake  can  be  investigated  to  develop  personalized  dosing  schedules.  Commercial  vials  indicated  molar  activity  of  2700-5730  Ci/mmol.  Understanding  posology  on  therapy  completion,  molar  activity  effects,  and  potential  short-term  and  long-term  adverse  events,  will  help  guide  the  development  of  future  theranostic  pairs,  improving  therapy  compliance  and  patient  outcomes.
        ■590    ▼aSchool  code:  0127.
        ■650  4▼aMedical  imaging.
        ■650  4▼aArt  therapy.
        ■650  4▼aNuclear  chemistry.
        ■653    ▼aPositron  emission  tomography
        ■653    ▼aGallium-68
        ■653    ▼aCarbon-11
        ■653    ▼aFluorine-18
        ■653    ▼aTheranostic  pairs
        ■653    ▼aRadiochemistry
        ■690    ▼a0574
        ■690    ▼a0754
        ■690    ▼a0738
        ■71020▼aUniversity  of  Michigan▼bMedicinal  Chemistry.
        ■7730  ▼tDissertations  Abstracts  International▼g87-03B.
        ■790    ▼a0127
        ■791    ▼aPh.D.
        ■792    ▼a2025
        ■793    ▼aEnglish
        ■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359874▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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