본문

서브메뉴

Impact of Formulation and Media Composition on Polymer Based Dispersions
Impact of Formulation and Media Composition on Polymer Based Dispersions
Impact of Formulation and Media Composition on Polymer Based Dispersions

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20250211153131
ISBN  
9798346828969
DDC  
547.84
저자명  
Bapat, Pradnya.
서명/저자  
Impact of Formulation and Media Composition on Polymer Based Dispersions
발행사항  
[Sl] : Purdue University, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
223 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-06, Section: A.
주기사항  
Advisor: Taylor, Lynne S.
학위논문주기  
Thesis (Ph.D.)--Purdue University, 2024.
초록/해제  
요약Amorphous solid dispersions (ASDs) are being widely used as enabling formulations for poorly water soluble drugs. An ASD is a molecular level mixture of an amorphous drug and a polymer to form a single-phase homogeneous blend. The amorphous form of a drug provides a higher transient solubility compared to equilibrium crystalline solubility, whereby the presence of a polymer of appropriate properties aids in crystallization inhibition. Polymers also improve the release rate of the drug from the ASD relative to the release rate of neat amorphous drug, specifically for release regimens where both drug and polymer release congruently. Hydroxypropyl methylcellulose acetate succinate (HPMCAS)-based ASDs tend to show congruent release of drug and polymer across multiple drug loadings, providing a significant dissolution improvement even beyond the amorphous solubility of a drug. Enteric polymers such as HPMCAS have been studied extensively in terms of enteric coated tablets but haven't been explored in as much detail when molecularly dispersed with a drug as in case of ASDs. Literature shows not all ASDs are able to improve bioavailability of drugs. Such a failure to provide bioavailability advantage via certain ASDs could come from a randomized drug and polymer selection in the preformulation stage of drug product development which could fundamentally arise from the lack of understanding of the release mechanisms of ASDs. Given that HPMCAS is one of the most popularly used polymers for spray drying of ASDs in the pharmaceutical industry, investigating the release mechanisms of HPMCAS-based ASDs is critical. In this study, some of the key formulation design factors, such as drug-polymer interactions, different grades of polymer as well as dissolution media factors such as buffer capacity that impact the release performance of HPMCAS-based ASDs have been investigated. The results from this study are expected to contribute to the fundamental understanding of the failure mechanisms of HPMCAS-based ASDs, reducing empirical screening of drugs during the preformulation stage of the product development and enhance the success rate of ASDs.
일반주제명  
Cellulose acetate
일반주제명  
Polymers
일반주제명  
Software
일반주제명  
Acids
일반주제명  
Dissolution
일반주제명  
Crystallization
일반주제명  
Particle size
일반주제명  
Energy
일반주제명  
Hydration
일반주제명  
Drug dosages
일반주제명  
Bioavailability
일반주제명  
Polymer chemistry
기타저자  
Purdue University.
기본자료저록  
Dissertations Abstracts International. 86-06A.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

 008250123s2024        us                              c    eng  d
■001000017165168
■00520250211153131
■006m          o    d                
■007cr#unu||||||||
■020    ▼a9798346828969
■035    ▼a(MiAaPQ)AAI31786107
■035    ▼a(MiAaPQ)Purdue27347841
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a547.84
■1001  ▼aBapat,  Pradnya.
■24510▼aImpact  of  Formulation  and  Media  Composition  on  Polymer  Based  Dispersions
■260    ▼a[Sl]▼bPurdue  University▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a223  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-06,  Section:  A.
■500    ▼aAdvisor:  Taylor,  Lynne  S.
■5021  ▼aThesis  (Ph.D.)--Purdue  University,  2024.
■520    ▼aAmorphous  solid  dispersions  (ASDs)  are  being  widely  used  as  enabling  formulations  for  poorly  water  soluble  drugs.  An  ASD  is  a  molecular  level  mixture  of  an  amorphous  drug  and  a  polymer  to  form  a  single-phase  homogeneous  blend.  The  amorphous  form  of  a  drug  provides  a  higher  transient  solubility  compared  to  equilibrium  crystalline  solubility,  whereby  the  presence  of  a  polymer  of  appropriate  properties  aids  in  crystallization  inhibition.  Polymers  also  improve  the  release  rate  of  the  drug  from  the  ASD  relative  to  the  release  rate  of  neat  amorphous  drug,  specifically  for  release  regimens  where  both  drug  and  polymer  release  congruently.  Hydroxypropyl  methylcellulose  acetate  succinate  (HPMCAS)-based  ASDs  tend  to  show  congruent  release  of  drug  and  polymer  across  multiple  drug  loadings,  providing  a  significant  dissolution  improvement  even  beyond  the  amorphous  solubility  of  a  drug.  Enteric  polymers  such  as  HPMCAS  have  been  studied  extensively  in  terms  of  enteric  coated  tablets  but  haven't  been  explored  in  as  much  detail  when  molecularly  dispersed  with  a  drug  as  in  case  of  ASDs.  Literature  shows  not  all  ASDs  are  able  to  improve  bioavailability  of  drugs.  Such  a  failure  to  provide  bioavailability  advantage  via  certain  ASDs  could  come  from  a  randomized  drug  and  polymer  selection  in  the  preformulation  stage  of  drug  product  development  which  could  fundamentally  arise  from  the  lack  of  understanding  of  the  release  mechanisms  of  ASDs.  Given  that  HPMCAS  is  one  of  the  most  popularly  used  polymers  for  spray  drying  of  ASDs  in  the  pharmaceutical  industry,  investigating  the  release  mechanisms  of  HPMCAS-based  ASDs  is  critical.  In  this  study,  some  of  the  key  formulation  design  factors,  such  as  drug-polymer  interactions,  different  grades  of  polymer  as  well  as  dissolution  media  factors  such  as  buffer  capacity  that  impact  the  release  performance  of  HPMCAS-based  ASDs  have  been  investigated.  The  results  from  this  study  are  expected  to  contribute  to  the  fundamental  understanding  of  the  failure  mechanisms  of  HPMCAS-based  ASDs,  reducing  empirical  screening  of  drugs  during  the  preformulation  stage  of  the  product  development  and  enhance  the  success  rate  of  ASDs.
■590    ▼aSchool  code:  0183.
■650  4▼aCellulose  acetate
■650  4▼aPolymers
■650  4▼aSoftware
■650  4▼aAcids
■650  4▼aDissolution
■650  4▼aCrystallization
■650  4▼aParticle  size
■650  4▼aEnergy
■650  4▼aHydration
■650  4▼aDrug  dosages
■650  4▼aBioavailability
■650  4▼aPolymer  chemistry
■690    ▼a0791
■690    ▼a0495
■690    ▼a0338
■71020▼aPurdue  University.
■7730  ▼tDissertations  Abstracts  International▼g86-06A.
■790    ▼a0183
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17165168▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

미리보기

내보내기

chatGPT토론

Ai 추천 관련 도서


    신착도서 더보기
    최근 3년간 통계입니다.

    소장정보

    • 예약
    • 소재불명신고
    • 나의폴더
    • 우선정리요청
    • 비도서대출신청
    • 야간 도서대출신청
    소장자료
    등록번호 청구기호 소장처 대출가능여부 대출정보
    TF10686 전자도서 대출가능 마이폴더 부재도서신고 비도서대출신청 야간 도서대출신청

    * 대출중인 자료에 한하여 예약이 가능합니다. 예약을 원하시면 예약버튼을 클릭하십시오.

    해당 도서를 다른 이용자가 함께 대출한 도서

    관련 인기도서

    로그인 후 이용 가능합니다.