AU722499B2 - Human B-cell antigens, related reagents - Google Patents

Human B-cell antigens, related reagents Download PDF

Info

Publication number
AU722499B2
AU722499B2 AU30599/97A AU3059997A AU722499B2 AU 722499 B2 AU722499 B2 AU 722499B2 AU 30599/97 A AU30599/97 A AU 30599/97A AU 3059997 A AU3059997 A AU 3059997A AU 722499 B2 AU722499 B2 AU 722499B2
Authority
AU
Australia
Prior art keywords
bas
protein
leu
antibody
nucleic acid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
AU30599/97A
Other languages
English (en)
Other versions
AU3059997A (en
Inventor
Jacques Banchereau
Isabelle Fugier-Vivier
Yong-Jun Liu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Merck Sharp and Dohme LLC
Original Assignee
Schering Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schering Corp filed Critical Schering Corp
Publication of AU3059997A publication Critical patent/AU3059997A/en
Application granted granted Critical
Publication of AU722499B2 publication Critical patent/AU722499B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12NMICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N15/00Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
    • C12N15/09Recombinant DNA-technology
    • C12N15/11DNA or RNA fragments; Modified forms thereof; Non-coding nucleic acids having a biological activity
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07KPEPTIDES
    • C07K14/00Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
    • C07K14/435Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
    • C07K14/705Receptors; Cell surface antigens; Cell surface determinants
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K38/00Medicinal preparations containing peptides
    • A61K38/16Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K38/00Medicinal preparations containing peptides
    • A61K38/16Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
    • A61K38/17Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07KPEPTIDES
    • C07K16/00Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
    • C07K16/18Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
    • C07K16/28Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12NMICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N15/00Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
    • C12N15/09Recombinant DNA-technology
    • C12N15/11DNA or RNA fragments; Modified forms thereof; Non-coding nucleic acids having a biological activity
    • C12N15/62DNA sequences coding for fusion proteins
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12NMICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N5/00Undifferentiated human, animal or plant cells, e.g. cell lines; Tissues; Cultivation or maintenance thereof; Culture media therefor
    • C12N5/10Cells modified by introduction of foreign genetic material
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12QMEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
    • C12Q1/00Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
    • C12Q1/68Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/50Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
    • G01N33/68Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving proteins, peptides or amino acids
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K38/00Medicinal preparations containing peptides
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07KPEPTIDES
    • C07K2319/00Fusion polypeptide
    • C07K2319/01Fusion polypeptide containing a localisation/targetting motif
    • C07K2319/02Fusion polypeptide containing a localisation/targetting motif containing a signal sequence

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Genetics & Genomics (AREA)
  • Organic Chemistry (AREA)
  • Biomedical Technology (AREA)
  • Zoology (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • General Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Biotechnology (AREA)
  • Immunology (AREA)
  • Wood Science & Technology (AREA)
  • Biochemistry (AREA)
  • Proteomics, Peptides & Aminoacids (AREA)
  • General Engineering & Computer Science (AREA)
  • Microbiology (AREA)
  • Biophysics (AREA)
  • Medicinal Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Gastroenterology & Hepatology (AREA)
  • Cell Biology (AREA)
  • Veterinary Medicine (AREA)
  • Analytical Chemistry (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Epidemiology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Plant Pathology (AREA)
  • Hematology (AREA)
  • Urology & Nephrology (AREA)
  • Food Science & Technology (AREA)
  • Toxicology (AREA)
  • General Physics & Mathematics (AREA)
  • Pathology (AREA)
  • Peptides Or Proteins (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
AU30599/97A 1996-05-17 1997-05-15 Human B-cell antigens, related reagents Ceased AU722499B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US64955396A 1996-05-17 1996-05-17
US08/649553 1996-05-17
PCT/US1997/007648 WO1997044452A1 (fr) 1996-05-17 1997-05-15 Antigenes de lymphocytes b humains, reactifs apparentes

Publications (2)

Publication Number Publication Date
AU3059997A AU3059997A (en) 1997-12-09
AU722499B2 true AU722499B2 (en) 2000-08-03

Family

ID=24605301

Family Applications (1)

Application Number Title Priority Date Filing Date
AU30599/97A Ceased AU722499B2 (en) 1996-05-17 1997-05-15 Human B-cell antigens, related reagents

Country Status (13)

Country Link
EP (1) EP0910636A1 (fr)
JP (1) JP2000514281A (fr)
KR (1) KR20000011101A (fr)
AU (1) AU722499B2 (fr)
BR (1) BR9710968A (fr)
CA (1) CA2254843A1 (fr)
CZ (1) CZ365098A3 (fr)
IL (1) IL126811A0 (fr)
NO (1) NO985339L (fr)
NZ (1) NZ332598A (fr)
PL (1) PL329930A1 (fr)
SK (1) SK157498A3 (fr)
WO (1) WO1997044452A1 (fr)

Families Citing this family (70)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU7434996A (en) * 1995-10-19 1997-05-07 Smithkline Beecham Corporation A novel human b cell surface molecule
BR122018071808B8 (pt) 2003-11-06 2020-06-30 Seattle Genetics Inc conjugado
EP2286844A3 (fr) 2004-06-01 2012-08-22 Genentech, Inc. Conjugués anticorps-médicament et procédés
NZ553500A (en) 2004-09-23 2009-11-27 Genentech Inc Genentech Inc Cysteine engineered antibodies and conjugates withCysteine engineered antibodies and conjugates with a free cysteine amino acid in the heavy chain a free cysteine amino acid in the heavy chain
US20100111856A1 (en) 2004-09-23 2010-05-06 Herman Gill Zirconium-radiolabeled, cysteine engineered antibody conjugates
AU2010292172A1 (en) 2009-09-09 2012-05-03 Centrose, Llc Extracellular targeted drug conjugates
JP5972864B2 (ja) 2010-04-15 2016-08-17 メディミューン リミテッド ピロロベンゾジアゼピン及びそれらのコンジュゲート
EP2579897A1 (fr) 2010-06-08 2013-04-17 Genentech, Inc. Anticorps et conjugués modifiés par la cystéine
EP2640727B1 (fr) 2010-11-17 2015-05-13 Genentech, Inc. Conjugués d'anticorps alaninyl-maytansinol
MX2013013054A (es) 2011-05-12 2014-02-20 Genentech Inc Metodo de monitoreo de lc-ms/ms de reaccion multiple para detectar anticuerpos terapeuticos en muestras de animales utilizando peptidos de firma de estructura.
KR101877598B1 (ko) 2011-10-14 2018-07-11 메디뮨 리미티드 피롤로벤조디아제핀 및 그의 컨주게이트
WO2013130093A1 (fr) 2012-03-02 2013-09-06 Genentech, Inc. Biomarqueurs pour un traitement à base de composés chimiothérapeutiques anti-tubuline
PT2906296T (pt) 2012-10-12 2018-06-01 Medimmune Ltd Conjugados de pirrolobenzodiazepina-anticorpo
EP2906250B1 (fr) 2012-10-12 2018-05-30 ADC Therapeutics SA Conjugués pyrrolobenzodiazepine-anticorps anti-psma
SI2906298T1 (sl) 2012-10-12 2018-12-31 Adc Therapeutics Sa Konjugati pirolobenzodiazepin-protitelo
SI2906251T1 (en) 2012-10-12 2018-01-31 Adc Therapeutics Sa Pyrrolobenzodiazepine-anti-CD22 antibody conjugates
AU2013328580B2 (en) 2012-10-12 2016-01-21 Medimmune Limited Pyrrolobenzodiazepines and conjugates thereof
KR101986404B1 (ko) 2012-10-12 2019-06-07 에이디씨 테라퓨틱스 에스에이 피롤로벤조디아제핀-항체 컨주게이트
WO2014057120A1 (fr) 2012-10-12 2014-04-17 Adc Therapeutics Sàrl Conjugués anticorps - pyrrolobenzodiazépine
CN105246894A (zh) 2012-12-21 2016-01-13 斯皮罗根有限公司 用于治疗增殖性和自身免疫疾病的非对称吡咯并苯并二氮杂卓二聚物
EP2935268B2 (fr) 2012-12-21 2021-02-17 MedImmune Limited Pyrrolobenzodiazépines et conjugués associés
NZ710745A (en) 2013-03-13 2019-03-29 Genentech Inc Pyrrolobenzodiazepines and conjugates thereof
AU2014230735B2 (en) 2013-03-13 2018-03-15 Medimmune Limited Pyrrolobenzodiazepines and conjugates thereof
US9649390B2 (en) 2013-03-13 2017-05-16 Medimmune Limited Pyrrolobenzodiazepines and conjugates thereof
WO2015023355A1 (fr) 2013-08-12 2015-02-19 Genentech, Inc. Conjugués anticorps-médicament dimérique 1-(chlorométhyl)-2,3-dihydro-1 h-benzo [e]indole, et méthodes d'utilisation et de traitement
WO2015052532A1 (fr) 2013-10-11 2015-04-16 Spirogen Sàrl Conjugués anticorps-pyrrolobenzodiazépines
GB201317982D0 (en) 2013-10-11 2013-11-27 Spirogen Sarl Pyrrolobenzodiazepines and conjugates thereof
US9956299B2 (en) 2013-10-11 2018-05-01 Medimmune Limited Pyrrolobenzodiazepine—antibody conjugates
EP3054985B1 (fr) 2013-10-11 2018-12-26 Medimmune Limited Conjugués anticorps-pyrrolobenzodiazépine
BR112016013861A2 (pt) 2013-12-16 2017-10-10 Genentech Inc conjugados de droga e anticorpo, compostos, método de tratamento e composição farmacêutica
JP6671292B2 (ja) 2013-12-16 2020-03-25 ジェネンテック, インコーポレイテッド ペプチド模倣化合物及びその抗体−薬物コンジュゲート
BR112016013258A2 (pt) 2013-12-16 2018-01-16 Genentech Inc composto conjugado anticorpo-droga, composição farmacêutica, método para tratar câncer e kit
EP3193940A1 (fr) 2014-09-10 2017-07-26 Medimmune Limited Pyrrolobenzodiazépines et leurs conjugués
AR101844A1 (es) 2014-09-12 2017-01-18 Genentech Inc Anticuerpos y conjugados modificados genéticamente con cisteína
WO2016040825A1 (fr) 2014-09-12 2016-03-17 Genentech, Inc. Intermédiaires disulfure d'anthracycline, conjugué anticorps-médicaments et procédés
GB201416112D0 (en) 2014-09-12 2014-10-29 Medimmune Ltd Pyrrolobenzodiazepines and conjugates thereof
CR20170099A (es) 2014-09-17 2017-07-19 Genentech Inc Pirrolobenzodiazepinas y conjugados de anticuerpos-disulfuro de las mismas
CN107148285B (zh) 2014-11-25 2022-01-04 Adc治疗股份有限公司 吡咯并苯并二氮杂䓬-抗体缀合物
CA2969689A1 (fr) 2014-12-03 2016-06-09 Genentech, Inc. Composes d'amine quaternaire et conjugues anticorps-medicament de ceux-ci
GB201506411D0 (en) 2015-04-15 2015-05-27 Bergenbio As Humanized anti-axl antibodies
GB201506402D0 (en) 2015-04-15 2015-05-27 Berkel Patricius H C Van And Howard Philip W Site-specific antibody-drug conjugates
MA43345A (fr) 2015-10-02 2018-08-08 Hoffmann La Roche Conjugués anticorps-médicaments de pyrrolobenzodiazépine et méthodes d'utilisation
MA43354A (fr) 2015-10-16 2018-08-22 Genentech Inc Conjugués médicamenteux à pont disulfure encombré
MA45326A (fr) 2015-10-20 2018-08-29 Genentech Inc Conjugués calichéamicine-anticorps-médicament et procédés d'utilisation
GB201601431D0 (en) 2016-01-26 2016-03-09 Medimmune Ltd Pyrrolobenzodiazepines
GB201602356D0 (en) 2016-02-10 2016-03-23 Medimmune Ltd Pyrrolobenzodiazepine Conjugates
GB201602359D0 (en) 2016-02-10 2016-03-23 Medimmune Ltd Pyrrolobenzodiazepine Conjugates
WO2017165734A1 (fr) 2016-03-25 2017-09-28 Genentech, Inc. Dosage multiplexé pour la quantification d'anticorps totaux et de médicaments conjugués à des anticorps
GB201607478D0 (en) 2016-04-29 2016-06-15 Medimmune Ltd Pyrrolobenzodiazepine Conjugates
PL3458101T3 (pl) 2016-05-20 2021-05-31 F. Hoffmann-La Roche Ag Koniugaty PROTAC-przeciwciało i sposoby ich stosowania
EP3465221B1 (fr) 2016-05-27 2020-07-22 H. Hoffnabb-La Roche Ag Procédé bioanalytique pour la caractérisation de conjugués anticorps-médicament spécifiques d'un site
US10639378B2 (en) 2016-06-06 2020-05-05 Genentech, Inc. Silvestrol antibody-drug conjugates and methods of use
JP7093767B2 (ja) 2016-08-11 2022-06-30 ジェネンテック, インコーポレイテッド ピロロベンゾジアゼピンプロドラッグ及びその抗体コンジュゲート
CN110139674B (zh) 2016-10-05 2023-05-16 豪夫迈·罗氏有限公司 制备抗体药物缀合物的方法
GB201617466D0 (en) 2016-10-14 2016-11-30 Medimmune Ltd Pyrrolobenzodiazepine conjugates
CA3047683C (fr) 2017-02-08 2020-03-10 Adc Therapeutics Sa Conjugues anticorps-pyrrolobenzodiazepine
GB201702031D0 (en) 2017-02-08 2017-03-22 Medlmmune Ltd Pyrrolobenzodiazepine-antibody conjugates
LT3612537T (lt) 2017-04-18 2022-10-10 Medimmune Limited Pirolobenzodiazepino konjugatai
BR112019021880A2 (pt) 2017-04-20 2020-06-02 Adc Therapeutics Sa Terapia de combinação com conjugado anticorpo anti-axl-droga
US11318211B2 (en) 2017-06-14 2022-05-03 Adc Therapeutics Sa Dosage regimes for the administration of an anti-CD19 ADC
LT3668874T (lt) 2017-08-18 2022-03-25 Medimmune Limited Pirolobenzodiazepino konjugatai
RU2020113749A (ru) 2017-09-20 2021-10-20 пиЭйч ФАРМА Ко., ЛТД. Аналоги таиланстатина
GB201803342D0 (en) 2018-03-01 2018-04-18 Medimmune Ltd Methods
GB201806022D0 (en) 2018-04-12 2018-05-30 Medimmune Ltd Pyrrolobenzodiazepines and conjugates thereof
GB201814281D0 (en) 2018-09-03 2018-10-17 Femtogenix Ltd Cytotoxic agents
AU2019365238A1 (en) 2018-10-24 2021-05-13 F. Hoffmann-La Roche Ag Conjugated chemical inducers of degradation and methods of use
CN113227119A (zh) 2018-12-10 2021-08-06 基因泰克公司 用于与含Fc的蛋白质进行位点特异性缀合的光交联肽
GB201901197D0 (en) 2019-01-29 2019-03-20 Femtogenix Ltd G-A Crosslinking cytotoxic agents
GB2597532A (en) 2020-07-28 2022-02-02 Femtogenix Ltd Cytotoxic compounds
WO2024138128A2 (fr) 2022-12-23 2024-06-27 Genentech, Inc. Conjugués d'agent de dégradation de céréblon et leurs utilisations

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5707829A (en) * 1995-08-11 1998-01-13 Genetics Institute, Inc. DNA sequences and secreted proteins encoded thereby

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
J. IMMUNOL. VOL.154(7) 1995 PP 3333-3340 *
THE JOUR. OF EXPERIMENTAL MED. V.180(4) 1994 PP1217-1224 *

Also Published As

Publication number Publication date
EP0910636A1 (fr) 1999-04-28
NZ332598A (en) 2000-04-28
PL329930A1 (en) 1999-04-26
KR20000011101A (ko) 2000-02-25
IL126811A0 (en) 1999-08-17
CA2254843A1 (fr) 1997-11-27
SK157498A3 (en) 1999-10-08
NO985339D0 (no) 1998-11-16
BR9710968A (pt) 2001-09-04
CZ365098A3 (cs) 1999-06-16
NO985339L (no) 1999-01-15
JP2000514281A (ja) 2000-10-31
WO1997044452A1 (fr) 1997-11-27
AU3059997A (en) 1997-12-09

Similar Documents

Publication Publication Date Title
AU722499B2 (en) Human B-cell antigens, related reagents
US6562333B1 (en) Purified mammalian CTLA-8 antigens and related reagents
US7879980B2 (en) Monoclonal antibodies to human CTLA-8 (IL-17A)
US6512103B1 (en) Mammalian chemokine reagents
EP0699236B2 (fr) Ligands purifies de flt3 de mammiferes et leurs agonistes/antagonistes
US7534867B1 (en) Purified mammalian Flt3 ligands; agonists; antagonists
US5811284A (en) Nucleic acids encoding kp43 protein and antigenic fragments thereof
WO1997029192A1 (fr) Reactifs constitues d'une chemokine de cellules dendritiques de mammiferes
US5965401A (en) Purified mammalian NK antigens and related reagents
EP0914453A1 (fr) INTERLEUKINE-1j D'ORIGINE HUMAINE ET SES ANTAGONISTES
US6737252B2 (en) 7 transmembrane receptor family member BLRX
US6124436A (en) Purified mammalian monocyte antigens and related reagents
US6812004B1 (en) Mammalian dendritic cell chemokine reagents
WO1997020046A1 (fr) Molecule d'adn, antigene tn et molecule d'adhesion appartenant a la superfamille des immunoglobulines
CA2163105A1 (fr) Ligands flt3 purifies de mammiferes; agonistes et antagonistes de ces ligands
WO1997029125A1 (fr) Reactifs constitues de chemokine de cellules dendritiques de mammiferes
US20090227021A1 (en) Purified mammalian ctla-8 antigens and related reagents

Legal Events

Date Code Title Description
FGA Letters patent sealed or granted (standard patent)
MK14 Patent ceased section 143(a) (annual fees not paid) or expired