1
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Pannecoucke M, Valgaeren B, Petitjean E, Hertveldt K, Terwecoren A. Neuro-image: aggressive vertebral hemangioma. Acta Neurol Belg 2023:10.1007/s13760-023-02312-z. [PMID: 37556103 DOI: 10.1007/s13760-023-02312-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Accepted: 06/20/2023] [Indexed: 08/10/2023]
Affiliation(s)
- M Pannecoucke
- Department of Neurology, Damiaan Hospital, Ostend, Belgium.
- Department of Neurology, Ghent University Hospital, Ghent, Belgium.
| | - B Valgaeren
- Department of Radiology, Damiaan Hospital, Ostend, Belgium
| | - E Petitjean
- Department of Physiotherapy, Damiaan Hospital, Ostend, Belgium
| | - K Hertveldt
- Department of Anatomical Pathology, Damiaan Hospital, Ostend, Belgium
| | - A Terwecoren
- Department of Neurology, Damiaan Hospital, Ostend, Belgium
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2
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Vermeersch G, Cruyt N, D'Hondt E, Geers J, Hertveldt K, Stockman A, Lambrecht G. Granulomatous peritoneal disease associated with oxaliplatin-based chemotherapy for ampullary adenocarcinoma: a case report. Acta Gastroenterol Belg 2023; 86:499-501. [PMID: 37814569 DOI: 10.51821/86.3.11323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/11/2023]
Abstract
Adenocarcinomas of the ampulla of Vater represent only 0.2% of all gastrointestinal cancers. Due to the low incidence no large clinical trials evaluating efficacy of treatments are available. Adjuvant therapy is often administered in patients with stage IB or higher. Oxaliplatin is considered as an effective and well tolerated therapeutic option. Adverse events associated with this therapy include cardio-, neuro-, nephrotoxicity and myelosuppression. Previously granulomatous pulmonary and liver manifestations have been described in oxaliplatin-based chemotherapy. In this report peritoneal manifestation of granulomatous disease associated with oxaliplatin is described for the first time. Sarcoidlike reactions may be misinterpreted as tumour progression or metastatic disease, and may consequently result in over-treatment.
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Affiliation(s)
- G Vermeersch
- Department of Gastroenterology and Digestive Oncology, AZ Damiaan, Oostende, Belgium
- Department of Internal Medicine, University Hospitals Leuven, Leuven, Belgium
| | - N Cruyt
- Department of Gastroenterology and Digestive Oncology, AZ Damiaan, Oostende, Belgium
- Department of Internal Medicine, University Hospitals Leuven, Leuven, Belgium
| | - E D'Hondt
- Department of Nuclear Medicine, AZ Damiaan, Oostende, Belgium
| | - J Geers
- Department of General and Abdominal Surgery, AZ Damiaan, Oostende, Belgium
| | - K Hertveldt
- Department of Anatomopathology, AZ Damiaan, Oostende, Belgium
| | - A Stockman
- Department of Radiology, AZ Damiaan, Oostende, Belgium
| | - G Lambrecht
- Department of Gastroenterology and Digestive Oncology, AZ Damiaan, Oostende, Belgium
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3
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Claeys M, Cool M, Lambrecht GL, Hertveldt K, Alliet G, Deboever G. CMV gastritis in the immunocompetent host. Acta Gastroenterol Belg 2015; 78:244-245. [PMID: 26151696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
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4
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Deboever G, Hiltrop N, Desmet G, Hertveldt K, Cool M, Lambrecht G. Endobronchial metastases from colorectal cancer. Acta Gastroenterol Belg 2011; 74:366-367. [PMID: 21861329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
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5
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Shaburova OV, Pleteneva EA, Hertveldt K, Krylov VN. Comparison of DNA sizes in a group of giant Pseudomonas aeruginosa phages by the PFGE method. RUSS J GENET+ 2008. [DOI: 10.1134/s1022795408050165] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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6
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Shaburova OV, Pleteneva EA, Hertveldt K, Krylov VN. [Comparison of DNA sizes in a group of giant Pseudomonas aeruginosa phages by the PFGE method]. Genetika 2008; 44:713-716. [PMID: 18672806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Genome sizes of Pseudomonas aeruginosa phages phiKZ and EL earlier determined by sequence analysis were shown to correspond to sizes of their DNAs assessed by pulse-electrophoresis (PFGE). Putative "redundant" genes in phiKZ phage genome are supposed to control functions promoting vigorous growth of the phage belonging to this species, compared to phages of EL species.
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7
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Krylov VN, Dela Cruz DM, Hertveldt K, Ackermann HW. "phiKZ-like viruses", a proposed new genus of myovirus bacteriophages. Arch Virol 2007; 152:1955-9. [PMID: 17680323 DOI: 10.1007/s00705-007-1037-7] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2007] [Accepted: 06/27/2007] [Indexed: 11/29/2022]
Abstract
The proposed phiKZ genus of myoviruses has 21 members. Phages are virulent, lyse Pseudomonas bacteria, and are characterized by very large heads and correspondingly high DNA contents. The genome of the type virus, phiKZ, has 306 ORFs and over 280 kbp and is the second-largest phage genome known. The phiKZ genus has very few relationships to other phages and includes three species and one possible species.
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Affiliation(s)
- V N Krylov
- State Research Institute of Genetics and Selection of Industrial Microorganisms, Moscow, Russia
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8
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Roucourt B, Chibeu A, Lecoutere E, Lavigne R, Volckaert G, Hertveldt K. Homotypic interactions among bacteriophage phiKMV early proteins. Arch Virol 2007; 152:1467-75. [PMID: 17534690 DOI: 10.1007/s00705-007-0967-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2006] [Accepted: 03/07/2007] [Indexed: 11/26/2022]
Abstract
Little is known about the bacteriophage proteins expressed immediately after infection of the host cell. Most of these early proteins are probably involved in bacteriophage-host interactions redirecting the bacterial metabolism to phage production. Interaction analysis of the first 16 phiKMV gene products (gp) identified homotypic interactions of gp7, gp9 and gp15. Two related yeast two-hybrid procedures, a matrix and a minilibrary approach, were applied to detect protein-protein interactions. A two-step selection procedure enabled drastic reduction of the background. Interactions were confirmed by drop tests. Multimerization of gp15 is consistent with its putative function as a DNA helicase involved in DNA replication. Homotypic interaction of gp7 and gp9 suggests they function as dimers or multimers. The absence of heterotypic interactions among early phiKMV proteins hints at their functional independence from other early phage proteins and their involvement in phage-host interactions that are important for creating optimal conditions for phage propagation. Besides, these results demonstrate the compatibility of phiKMV early gene products with the yeast two-hybrid system. Therefore, they are promising candidates to screen for interactions with host proteins.
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Affiliation(s)
- B Roucourt
- Division of Gene Technology, Department of Biosystems, Katholieke Universiteit Leuven, Leuven, Belgium
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9
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Affiliation(s)
- W Van Moerkercke
- Department of Internal Medicine, Gasthuisberg University Hospital, Leuven, Belgium.
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10
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Briers Y, Lavigne R, Hertveldt K, Hanssens I, Engelborghs Y, Volckaert G. Stability of phiKMV lysin gp36c reflects its role during bacteriophage infection. Commun Agric Appl Biol Sci 2007; 72:115-118. [PMID: 18018871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Affiliation(s)
- Y Briers
- Department of Biosystems, Division of Gene Technology, Katholieke Universiteit Leuven, Kasteelpark Arenberg 21, BE-3001 Leuven, Belgium
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11
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Shaburova OV, Hertveldt K, de la Cruz DMA, Krylov SV, Pleteneva EA, Bourkaltseva MV, Lavigne R, Volckaert G, Krylov VN. Comparison of new giant bacteriophages OBP and Lu11 of soil pseudomonads with bacteriophages of the ϕKZ-supergroup of Pseudomonas aeruginosa. RUSS J GENET+ 2006. [DOI: 10.1134/s1022795406080059] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Shaburova OV, Hertveldt K, de la Crus DMA, Krylov SV, Pleteneva EA, Burkaltseva MV, Lavigne R, Volcaert G, Krylov VN. [Comparison of new giant bacteriophages OBP and Lu11 of soil pseudomonads with bacteriophages of phiKZ-supergroup of Pseudomonas aeruginosa]. Genetika 2006; 42:1065-74. [PMID: 17025156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Study of two recently isolated giant bacteriophages Lu11 and OBP that are active on Pseudomonas putida var. Manila and Pseudomonas fluorescens, respectively, demonstrated their similarity in morphology, genome size, and size of phage particles, with giant bacteriophages of Pseudomonas aeruginosa assigned to the supergroup of phiKZ-like phages of the family Myoviridae designated in this manner according to the best studied phage phiKZ that belongs to the species of this group widely distributed in nature. Comparison of major polypeptide sizes of mature particles suggests the similarity of certain proteins in the phages examined. In OBP particles visualized with an electron microscope, an "inner body" was detected, which points to the specific DNA package intrinsic to phages of phiKZ group. In the meantime, phages Lul11 and OBP do not exhibit resemblance among themselves or with any of earlier described phiKZ-like phages in respect to other traits; particularly, they have no detectable DNA homology. Note that phage Lu11 of P. putida var. Manila exhibits very slight homology with phage Lin68 of the family of P. aeruginosa phiKZ-like phages detected only in blot hybridization. This suggests the possible involvement of these phages in interspecies recombination ("gene shuffling") between phages of various bacterial species. Results of partial sequencing of phage genomes confirmed the phylogenetic relatedness of phage OBP to phages of the phiKZ-supergroup, whereas phage Lu11 most probably belongs to a novel species that is not a member of supergroup phiKZ composition. The results of the study are discussed in terms of the evolution of these phages.
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13
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Briers Y, Lavigne R, Plessers P, Hertveldt K, Hanssens I, Engelborghs Y, Volckaert G. Stability analysis of the bacteriophage ϕKMV lysin gp36C and its putative role during infection. Cell Mol Life Sci 2006; 63:1899-905. [PMID: 16847574 DOI: 10.1007/s00018-006-6183-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The kinetic, thermodynamic and structural stability of gp36C, the virion-associated peptidoglycan hydrolase domain of bacteriophage phiKMV, is analyzed. Recombinant gp36C is highly thermoresistant (k = 0.595 h(-1) at 95 degrees C), but not thermostable (T(m) = 50.2 degrees C, DeltaH(cal) = 6.86 x 10(4) cal mol(-1)). However, aggregation influences kinetic stability in an unusual manner since aggregation is more pronounced at 55 degrees C than at higher temperatures. Furthermore, gp36C reversibly unfolds in a two-state endothermic transition, and circular dichroism analysis shows that gp36C almost completely refolds after a 3-h heat treatment at 85 degrees C. These properties are in agreement with gp36C being part of the extensible tail which is ejected in an unfolded state during phage infection.
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Affiliation(s)
- Y Briers
- Division of Gene Technology, Katholieke Universiteit Leuven, Kasteelpark Arenberg 21, Leuven 3001, Belgium.
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14
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Ceyssens PJ, Lavigne R, Hertveldt K, Volckaert G. Isolation of lytic Pseudomonas aeruginosa bacteriophages from worldwide collected water samples. Commun Agric Appl Biol Sci 2006; 71:95-8. [PMID: 17191482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Affiliation(s)
- P J Ceyssens
- Division of Gene Technology, Katholieke Universiteit Leuven, Kasteelpark Arenberg 21, Leuven, BE-3001, Belgium
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15
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Abstract
Gene 17 product (gp17) of the Pseudomonas aeruginosa-infecting bacteriophage phiKMV shows in silico similarity to T7 DNA ligase. In a semi-quantitative activity assay, it is shown that gp17 is a functional, ATP-dependent DNA ligase, in spite of some structural differences related to DNA-binding properties). Enzymatic activity of His6-based purified expression product was optimised (4 degrees C at 24h for sticky end double-stranded DNA fragments) and estimated at 0.5 Weiss U/microg.
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Affiliation(s)
- R Lavigne
- Laboratory of Gene Technology, Katholieke Universiteit Leuven, Kasteelpark Arenberg 21, Leuven, B-3001, Belgium
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16
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Krylov VN, Pletneva EA, Lavigne R, Hertveldt K, Volkaert G, Sernova NV, Georgopoulos C, Korchevsliĭ RV, Kurochkina LP, Mesianzhinov VV. [Comparison of the genome for phylogenetically related bacteriophages phiKZ and EL of Pseudomonas aeruginosa: evolutionary aspects and minimal genome size]. Genetika 2005; 41:455-65. [PMID: 15909907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Bacteriophages of the family Myoviridae represent one of the most widespread domains of the biosphere substantially affecting the ecological balance of microorganisms. Interestingly, sequence analysis of genomic DNAs of large bacteriophages revealed many genes coding for proteins with unknown functions. A new approach is proposed to improve the functional identification of genes. This approach is based on comparing the genome sequence for phylogenetically and morphologically related phages showing no considerable homology at the level of genomic DNA. It is assumed that gene functions essential for the development of phages of a given family are conserved and that the corresponding genes code for similar orthologous proteins even when lacking sequence homology. The genome was sequenced and compared for two Pseudomonas aeruginosa giant bacteriophages, phiKZ and EL, which belong to a group of (phiKZ-related phages. A substantial difference in genome organization was observed, suggesting specific features of phage evolution. In addition, the problem of the minimal genome of the superfamily is discussed on the basis of the difference in size and structure between the phiKZ and EL genomes.
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17
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Tresinie M, Van de Maele F, Verhaeghe W, Van de Maele B, Venken R, Hertveldt K. A 75-year-old female with dyspnoea and chest pain. Eur Respir J 2005; 25:768-70. [PMID: 15802354 DOI: 10.1183/09031936.05.00110904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- M Tresinie
- Respiratory Division, Henri Serruys Hospital, Oostende, Belgium
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18
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Beliën T, Hertveldt K, Van den Brande K, Robben J, Van Campenhout S, Volckaert G. Functional display of family 11 endoxylanases on the surface of phage M13. J Biotechnol 2005; 115:249-60. [PMID: 15639087 DOI: 10.1016/j.jbiotec.2004.08.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2003] [Revised: 08/06/2004] [Accepted: 08/19/2004] [Indexed: 01/08/2023]
Abstract
Two family 11 endoxylanases (EC 3.2.1.8) were functionally displayed on the surface of bacteriophage M13. The genes encoding endo-1,4-xylanase I from Aspergillus niger (ExlA) and endo-1,4-xylanase A from Bacillus subtilis (XynA) were fused to the gene encoding the minor coat protein g3p in phagemid vector pHOS31. Phage rescue resulted in functional monovalent display of the enzymes as was demonstrated by three independent tests. Firstly, purified recombinant phage particles showed a clear hydrolytic activity in an activity assay based on insoluble, chromagenic arabinoxylan substrate. Secondly, specific binding of endoxylanase displaying phages to immobilized endoxylanase inhibitors was demonstrated by interaction ELISA. Finally, two rounds of selection and amplification in a biopanning procedure against immobilized endoxylanase inhibitor were performed. Phages displaying endoxylanases were strongly enriched from background phages displaying unrelated proteins. These results open perspectives to use phage display for analysing protein-protein interactions at the interface between endoxylanases and their inhibitors. In addition, this technology should enable engineering of endoxylanases into novel variants with altered binding properties towards endoxylanase inhibitors.
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Affiliation(s)
- T Beliën
- Laboratory of Gene Technology, Katholieke Universiteit Leuven, Kasteelpark Arenberg 21, B-3001 Leuven, Belgium
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19
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Roucourt B, Lavigne R, Hertveldt K, Volckaert G. A general approach for recombinant protein expression in E. coli. Commun Agric Appl Biol Sci 2005; 70:231-4. [PMID: 16366315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Affiliation(s)
- B Roucourt
- Laboratory of Gene Technology, Leuven, KU Leuven, Belgium
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20
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Abstract
Pseudomonas aeruginosa bacteriophage phiKMV is a T7-like lytic phage. Liquid chromatography-mass spectrometry of the structural proteins revealed gene product 36 (gp36) as part of the phiKMV phage particle. The presence of a lysozyme domain in the C terminal of this protein (gp36C) was verified by turbidimetric assays on chloroform-treated P. aeruginosa PAO1 and Escherichia coli WK6 cells. The molecular mass (20,884 Da) and pI (6.4) of recombinant gp36C were determined, as were the optimal enzymatic conditions (pH 6.0 in 16.7 mM phosphate buffer) and activity (4800 U/mg). Recombinant gp36C is a highly thermostable lysozyme, retaining 26% of its activity after 2 h at 100 degrees C and 21% after autoclaving. This thermostability could prove an interesting characteristic for food conservation technology.
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Affiliation(s)
- R Lavigne
- Laboratory of Gene Technology, Katholieke Universiteit Leuven, Kasteelpark Arenberg 21, 3001 Leuven, Belgium
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21
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Collard B, Cool M, Hertveldt K, Claikens B, Delanote G. Pulmonary alveolar proteinosis. JBR-BTR 2002; 85:260-3. [PMID: 12463503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
Abstract
A 23-year-old man was admitted to the hospital because of dyspnea. Chest X-ray showed reticulo-nodular opacities. The crazy paving appearance on high-resolution CT was highly suggestive of pulmonary alveolar proteinosis. Histologic examination confirmed the diagnosis. Pulmonary alveolar proteinosis is a rare disease but an important diagnosis to make as treatment with pulmonary lavage is curative in a large proportion of patients.
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Affiliation(s)
- B Collard
- Department of Radiology, AZ Damiaan, Oostende, Belgium
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22
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Affiliation(s)
- N Walgraeve
- Departments of Nuclear Medicine, Pathology, and Pneumology, Saint-John's General Hospital, Brugge, Belgium
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23
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Colpaert C, Bogers J, Hertveldt K, Loquet P, Dumon J, Willems P. Limb-body wall complex: 4 new cases illustrating the importance of examining placenta and umbilical cord. Pathol Res Pract 2001; 196:783-90. [PMID: 11186176 DOI: 10.1016/s0344-0338(00)80114-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Abstract
Limb-body wall complex (LBWC) is a rare, sporadic, congenital defect defined as a combination of at least two of three characteristics: 1. limb defects, 2. anterior body wall defects, and 3. exencephaly or encephalocoele with/without facial clefts. Three pathogenic mechanisms have been proposed: early amnion rupture, vascular disruption and embryonic dysgenesis. In this study we carried out the pathological evaluation of four fetuses with LBWC and their placentas. None of the cases had craniofacial defects. Three fetuses showed an abdominal wall defect with eventration of abdominal organs, cloacal exstrophy, absent external genitalia, abnormal internal genitalia, scoliosis and lower limb defects. One fetus showed failure of closure of both thoracic and abdominal walls with ectopia cordis, evisceration of left lung and abdominal organs, severe reduction defect of left arm, but normal colon, anus, bladder, genitalia and lower limbs. All cases had a short, malformed umbilical cord, incompletely covered by amnion. The umbilical vessels were embedded in an amniotic sheet which connected the skin margin of the anterior body wall defect to the placenta. These anomalies suggest an abnormal body stalk development as a pathogenic mechanism for LBWC. Prenatally, the abnormal fetoplacental attachment can be detected ultrasonographically by the end of the first gestational trimester. Postnatally, the examination of placenta, umbilical cord and membranes is crucial in confirming the diagnosis of LBWC.
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Affiliation(s)
- C Colpaert
- Department of Pathology, University Hospital Antwerp, Edegem, Belgium
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24
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Benoit D, Peleman R, Claeys G, Hertveldt K, Vandewoude K. Mixed community-acquired fungal infection in an apparently healthy patient. Eur J Clin Microbiol Infect Dis 2000; 19:642-3. [PMID: 11014632 DOI: 10.1007/s100960000331] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- D Benoit
- Department of Intensive Care Medicine, Ghent University Hospital, Belgium
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25
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Hertveldt K, Philippé J, Thierens H, Cornelissen M, Vral A, De Ridder L. Flow cytometry as a quantitative and sensitive method to evaluate low dose radiation induced apoptosis in vitro in human peripheral blood lymphocytes. Int J Radiat Biol 1997; 71:429-33. [PMID: 9154146 DOI: 10.1080/095530097144049] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Human peripheral blood lymphocytes, irradiated in vitro, die by an apoptotic process. The number of apoptotic cells after in vitro gamma-irradiation (0, 0.1, 0.2, 1, 2 and 5 Gy) was measured by flow cytometry using Annexin V and DiOC6 (a cationic dye) after 24 and 48 h incubation. The mean dose-response curves for apoptosis of six healthy volunteers obtained with both methods were steep below 1 Gy and flatter at higher doses. A slightly higher number of apoptotic cells was observed with DiOC6, compared to Annexin V. This can be assigned to a minor DiOC6-int/PI- population. Forty-eight hour cultures contained higher numbers of apoptotic cells compared with 24 h cultures. For both culture times, DiOC6 and Annexin V detected a statistically significant difference between a control sample and a 0.1 Gy irradiated one, illustrating the high sensitivity of the methods.
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Affiliation(s)
- K Hertveldt
- Department of Anatomy, Embryology and Histology, University of Ghent, Belgium
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