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Ranocchia J, Irving W, Haase B. Exclusion of previously described variant in LTBP2 for primary glaucoma in Australian Burmese cats. Anim Genet 2023; 54:657-658. [PMID: 37499110 DOI: 10.1111/age.13346] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Accepted: 07/10/2023] [Indexed: 07/29/2023]
Affiliation(s)
- J Ranocchia
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Camperdown, New South Wales, Australia
| | - W Irving
- Eye Clinic for Animals, Artarmon, New South Wales, Australia
| | - B Haase
- Sydney School of Veterinary Science, Faculty of Science, The University of Sydney, Camperdown, New South Wales, Australia
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Jerjen CP, Kumaran SJ, Liesegang A, Hall E, Wichert B, Haase B. Melanocortin-4 receptor and proopiomelanocortin: Candidate genes for obesity in domestic shorthair cats. Anim Genet 2023; 54:637-642. [PMID: 37365843 DOI: 10.1111/age.13335] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 05/16/2023] [Accepted: 06/05/2023] [Indexed: 06/28/2023]
Abstract
Obesity is an escalating global health problem affecting both humans and companion animals. In cats it is associated with increased mortality and multiple diseases, including diabetes mellitus. Two genes coding for proteins known to play a critical role in energy homeostasis across species are the proopiomelanocortin (POMC) gene and the melanocortin-4 receptor (MC4R) gene. A missense variant in the coding sequence of the feline MC4R (MC4R:c.92C>T) has been reported to be associated with diabetes and overweight in domestic shorthair cats, and while variants in the POMC gene are known to cause obesity in humans and dogs, variants in POMC and their association with feline obesity and diabetes mellitus have not been investigated to date. The current study aimed to assess the association between the previously described MC4R variant and body condition score (BCS), as well as body fat content (%BF) in 89 non-diabetic domestic shorthair cats. Furthermore, we investigated the feline POMC gene as a potential candidate gene for obesity. Our results indicate that the MC4R:c.92C>T polymorphism is not associated with BCS or %BF in non-diabetic domestic shorthair cats. The mutation analysis of all POMC exons identified two missense variants, with a variant in exon 1 (c.28G>C; p.G10R) predicted to be damaging. The variant was subsequently assessed in all 89 cats, and cats heterozygous for the variant had a significantly increased body condition score (p = 0.03) compared with cats homozygous for the wild-type allele. Results from our study provide additional evidence that the previously described variant in MC4R is not associated with obesity in domestic shorthair cats. More importantly, we have identified a novel variant in the POMC gene, which might play a role in increased body condition score and body fat content in domestic shorthair cats.
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Affiliation(s)
- C P Jerjen
- Faculty of Science, Sydney School of Veterinary Science, University of Sydney, Camperdown, New South Wales, Australia
| | - S J Kumaran
- Faculty of Science, Sydney School of Veterinary Science, University of Sydney, Camperdown, New South Wales, Australia
| | - A Liesegang
- Vetsuisse Faculty, Institute of Animal Nutrition and Dietetics, University of Zurich, Zurich, Switzerland
| | - E Hall
- Faculty of Science, Sydney School of Veterinary Science, University of Sydney, Camperdown, New South Wales, Australia
| | - B Wichert
- Vetsuisse Faculty, Institute of Animal Nutrition and Dietetics, University of Zurich, Zurich, Switzerland
| | - B Haase
- Faculty of Science, Sydney School of Veterinary Science, University of Sydney, Camperdown, New South Wales, Australia
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Haase B, Willet CE, Chew T, Samaha G, Child G, Wade CM. De-novo and genome-wide meta-analyses identify a risk haplotype for congenital sensorineural deafness in Dalmatian dogs. Sci Rep 2022; 12:15439. [PMID: 36104420 PMCID: PMC9474838 DOI: 10.1038/s41598-022-19535-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 08/30/2022] [Indexed: 11/29/2022] Open
Abstract
Congenital sensorineural deafness (CSD) has been reported to affect up to 30% of Dalmatian dogs world-wide and while unilaterally deaf dogs can live a close to normal life, dogs suffering bilateral deafness are frequently euthanized. Extreme-white coat patterning as encoded by the gene Melanocyte Inducing Transcription Factor (MITF) has long been postulated as the major risk factor for CSD in the Dalmatian breed. While attempts to identify causative risk variants associated with CSD have been numerous, no genome-wide association study has positively identified MITF as a risk locus for either bilateral or unilateral deafness in the Dalmatian breed to date. In this study, we identified an association with CSD on CFA20 in the vicinity of MITF within Australian Dalmatian dogs. Although not genome-wide significant, the association signal was validated by reanalysing publicly available data and merging the wider data resource with the local data to improve statistical power. The merged data, representing three major global populations of Dalmatian dogs, enabled us to identify a single, well-defined genome-wide significant risk haplotype for CSD. The haplotype was formed by three genome-wide significant associated markers (BICF2G630233852T>C, BICF2G630233861T>C, BICF2G630233888G>A) on CFA20 with 62% of bilaterally deaf dogs homozygous for the risk haplotype (CCA), while 30% of bilaterally deaf and 45% of hearing dogs carried one copy of the risk haplotype. Animals homozygous or heterozygous for the low-risk haplotype were less likely to be unilaterally deaf. While the association between the risk haplotype and deafness is incomplete, animals homozygous for the risk haplotype were 10-times more likely to be bilaterally deaf. Although the underlying causative variants are yet to be discovered, results from this study can now assist with reducing deafness in Dalmatian dogs.
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Brancalion L, Haase B, Wade CM. Canine coat pigmentation genetics: a review. Anim Genet 2021; 53:3-34. [PMID: 34751460 DOI: 10.1111/age.13154] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 09/21/2021] [Accepted: 10/20/2021] [Indexed: 11/27/2022]
Abstract
Our understanding of canine coat colour genetics and the associated health implications is developing rapidly. To date, there are 15 genes with known roles in canine coat colour phenotypes. Many coat phenotypes result from complex and/or epistatic genetic interactions among variants within and between loci, some of which remain unidentified. Some genes involved in canine pigmentation have been linked to aural, visual and neurological impairments. Consequently, coat pigmentation in the domestic dog retains considerable ethical and economic interest. In this paper we discuss coat colour phenotypes in the domestic dog, the genes and variants responsible for these phenotypes and any proven coat colour-associated health effects.
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Affiliation(s)
- L Brancalion
- Faculty of Science, School of Life and Environmental Sciences, University of Sydney, Camperdown, NSW, 2006, Australia
| | - B Haase
- Faculty of Science, School of Veterinary Science, University of Sydney, Camperdown, NSW, 2006, Australia
| | - C M Wade
- Faculty of Science, School of Life and Environmental Sciences, University of Sydney, Camperdown, NSW, 2006, Australia
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Brancalion L, Haase B, Mazrier H, Willet CE, Lindblad-Toh K, Lingaas F, Wade CM. Roan, ticked and clear coat patterns in the canine are associated with three haplotypes near usherin on CFA38. Anim Genet 2021; 52:198-207. [PMID: 33539602 PMCID: PMC7986734 DOI: 10.1111/age.13040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/04/2021] [Indexed: 12/19/2022]
Abstract
White coat patterning is a feature of many dog breeds and is known to be coded primarily by the gene micropthalmia‐associated transcription factor (MITF). This patterning in the coat can be modified by other factors to produce the attractive phenotypes termed ‘ticked’ and ‘roan’ that describe the presence of flecks of color that vary in distribution and intensity within otherwise ‘clear’ white markings. The appearance of the pigment in the white patterning caused by ticking and roaning intensifies in the weeks after birth. We applied genome‐wide association to compare English Cocker Spaniels of roan phenotype (N = 34) with parti‐color (non‐roan) English Cocker Spaniels (N = 9) and identified an associated locus on CFA 38, CFA38:11 057 040 (Praw = 8.9 × 10−10, Pgenome = 2.7 × 10−5). A local case–control association in English Springer Spaniels comparing 11 ticked and six clear dogs identified indicative association with a different haplotype, CFA38:11 122 467G>T (Praw = 1.7 × 10−5) and CFA38:11 124 294A>C (Praw = 1.7 × 10−5). We characterize three haplotypes in Spaniels according to their putative functional variant profiles at CFA38:11 111 286C>T (missense), CFA38:11 131 841–11 143 239DUP.insTTAA (using strongly linked marker CFA38:11 143 243C>T) and CFA38:11 156 425T>C (splice site). In Spaniels, the haplotypes work as an allelic series including alleles (t, recessive clear; T, dominant ticked/parti‐color; and TR, incomplete dominant roan) to control the appearance of pigmented spots or flecks in otherwise white areas of the canine coat. In Spaniels the associated haplotypes are t (CCT), T (TCC) and TR (TTT) for SNP markers on CFA38 at 11 111 286C>T, 11 143 243C>T and 11 156 425T>C respectively. It is likely that other alleles exist in this series and together the haplotypes result in a complex range of patterning that is only visible when dogs have white patterning resulting from the epistatic gene Micropthalmia‐associated transcription factor (the S‐locus).
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Affiliation(s)
- L Brancalion
- Faculty of Science, University of Sydney, Camperdown, 2006, NSW, Australia
| | - B Haase
- Faculty of Science, University of Sydney, Camperdown, 2006, NSW, Australia
| | - H Mazrier
- Faculty of Science, University of Sydney, Camperdown, 2006, NSW, Australia
| | - C E Willet
- Sydney Informatics Hub, University of Sydney, Camperdown, 2006, NSW, Australia
| | - K Lindblad-Toh
- The Broad Institute of Harvard and MIT, Cambridge, MA, 02142, USA.,Science for Life Laboratory, Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, 75123, Sweden
| | - F Lingaas
- Section of Medical Genetics, Department of Preclinical Sciences and Pathology, Norwegian University of Life Sciences, Oslo, N-0102, Norway
| | - C M Wade
- Faculty of Science, University of Sydney, Camperdown, 2006, NSW, Australia
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Whitney J, Haase B, Beatty J, Barrs VR. Genetic polymorphisms in toll-like receptors 1, 2, and 4 in feline upper respiratory tract aspergillosis. Vet Immunol Immunopathol 2019; 217:109921. [PMID: 31446071 DOI: 10.1016/j.vetimm.2019.109921] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 08/01/2019] [Accepted: 08/06/2019] [Indexed: 12/21/2022]
Abstract
Fungal species in the genus Aspergillus are environmental saprophytes that can act as opportunistic pathogens of the nasal cavity and paranasal sinuses in humans, cats and other species. Upper respiratory tract aspergillosis (URTA) presents as non-invasive and invasive forms with the latter occurring almost exclusively in immunocompromised hosts. However, in domestic cats, invasive URTA affects apparently immunocompetent patients. A defect in innate immunity has been proposed as a predisposing factor in invasive feline URTA. Single nucleotide polymorphisms (SNPs) in pattern recognition receptor genes have been implicated in the pathogenesis of aspergillosis in humans. The aims of this study were to identify non-synonymous SNPs in the coding regions of toll-like receptors involved in the immune response to Aspergillus spp. and to compare the frequency of these SNPs between affected and control cats. The coding and flanking regions of TLR1, TLR2 and TLR4 were sequenced in 14 cats with URTA and the sequences were compared with those in 20 control cats without aspergillosis. In total, 23 non-synonymous SNPs were identified in TLR1 (n = 11), TLR2 (n = 3) and TLR4 (n = 10). Differences in allelic frequency of non-synonymous SNPs between affected and controls were not identified either within breeds or overall or between non-invasive and invasive disease phenotypes. Although allelic frequency differed between cat breeds that are overrepresented for URTA and underrepresented breeds there was no association differences identified between affected cats and underrepresented breeds. The difference in allelic frequency of an INDEL point mutation identified in intron 1 of TLR4, between cats with non-invasive versus invasive aspergillosis approached significance (p = 0.054). While results from this study do not support a role for non-synonymous SNPs in the pathogenesis of feline URTA they do provide evidence that investigation for polymorphisms in non-coding regions of these genes and in other pattern recognition receptors are warranted.
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Affiliation(s)
- J Whitney
- Sydney School of Veterinary Science, Faculty of Science, University of Sydney, NSW 2006, Australia.
| | - B Haase
- Sydney School of Veterinary Science, Faculty of Science, University of Sydney, NSW 2006, Australia
| | - J Beatty
- Sydney School of Veterinary Science, Faculty of Science, University of Sydney, NSW 2006, Australia; Marie Bashir Institute of Infectious Diseases and Biosecurity, University of Sydney, NSW 2006, Australia
| | - V R Barrs
- Sydney School of Veterinary Science, Faculty of Science, University of Sydney, NSW 2006, Australia; Marie Bashir Institute of Infectious Diseases and Biosecurity, University of Sydney, NSW 2006, Australia
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Abstract
The recent extension of genetic tools to the domestic cat, together with the serendipitous consequences of selective breeding, have been essential to the study of the genetic diseases that affect them. Cats are increasingly presented for veterinary surveillance and share many of human's heritable diseases, allowing them to serve as natural models of these conditions. Feline diabetes mellitus is a common condition in domestic cats that bears close pathological and clinical resemblance to type 2 diabetes in humans, including pancreatic β-cell dysfunction and peripheral insulin resistance. In Australia, New Zealand and Europe, diabetes mellitus is almost four times more common in cats of the Burmese breed than in other breeds. This geographically based breed predisposition parallels familial and population clustering of type 2 diabetes in humans. As a genetically isolated population, the Australian Burmese breed provides a spontaneous, naturally occurring genetic model of type 2 diabetes. Genetically isolated populations typically exhibit extended linkage disequilibrium and increased opportunity for deleterious variants to reach high frequencies over many generations due to genetic drift. Studying complex diseases in such populations allows for tighter control of confounding factors including environmental heterogeneity, allelic frequencies and population stratification. The homogeneous genetic background of Australian Burmese cats may provide a unique opportunity to either refine genetic signals previously associated with type 2 diabetes or identify new risk factors for this disease.
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Affiliation(s)
- G Samaha
- Sydney School of Veterinary Science, University of Sydney, Sydney, NSW, 2006, Australia
| | - J Beatty
- Sydney School of Veterinary Science, Valentine Charlton Cat Centre, University of Sydney, Sydney, NSW, 2006, Australia
| | - C M Wade
- School of Life and Environmental Sciences, University of Sydney, Sydney, NSW, 2006, Australia
| | - B Haase
- Sydney School of Veterinary Science, University of Sydney, Sydney, NSW, 2006, Australia
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Whitney J, Haase B, Beatty J, Barrs VR. Breed-specific variations in the coding region of toll-like receptor 4 in the domestic cat. Vet Immunol Immunopathol 2019; 209:61-69. [PMID: 30885307 PMCID: PMC7126157 DOI: 10.1016/j.vetimm.2019.02.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 02/01/2019] [Accepted: 02/25/2019] [Indexed: 12/15/2022]
Abstract
Specific point mutations in the human toll-like receptor 4 (TLR4) confer altered risk for diverse diseases including sepsis, aspergillosis and inflammatory bowel disease. Some of these TLR4 polymorphisms are racially specific. We hypothesised that feline TLR4 polymorphisms might underlie an observed increased risk to infectious and inflammatory diseases in some cat breeds. The aim of this study was to identify breed-specific variations in the coding region of feline TLR4 and to model the effect of mutations on protein structure and function in silico. The entire coding region of TLR4 was sequenced in 8 groups (7 pure-bred, 1 crossbred) of domestic cats (Felis catus) comprising 158 individuals. Twenty-two single nucleotide polymorphisms (SNPs) were identified in TLR4, with 16 located in the coding region (11 non-synonymous) and four in the 3′UTR. Comparison of breed specific allelic frequencies indicated that Burmese and British shorthairs most commonly differed from other breeds. In silico analyses to predict the impact of the 11 non-synonymous variants indicated a deleterious effect on protein structure for one SNP (c.869 G > A), which was not associated with a specific breed. Overall, findings from this study do not support a role of TLR4 dysfunction in breed-predispositions to infectious diseases in domestic cats in Australia.
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Affiliation(s)
- J Whitney
- Sydney School of Veterinary Science, Faculty of Science, University of Sydney, NSW 2006, Australia.
| | - B Haase
- Sydney School of Veterinary Science, Faculty of Science, University of Sydney, NSW 2006, Australia.
| | - J Beatty
- Sydney School of Veterinary Science, Faculty of Science, University of Sydney, NSW 2006, Australia; Marie Bashir Institute of Infectious Diseases and Biosecurity, University of Sydney, NSW 2006, Australia.
| | - V R Barrs
- Sydney School of Veterinary Science, Faculty of Science, University of Sydney, NSW 2006, Australia; Marie Bashir Institute of Infectious Diseases and Biosecurity, University of Sydney, NSW 2006, Australia.
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Capella JJ, Félix F, Flórez-González L, Gibbons J, Haase B, Guzman HM. Geographic and temporal patterns of non-lethal attacks on humpback whales by killer whales in the eastern South Pacific and the Antarctic Peninsula. ENDANGER SPECIES RES 2018. [DOI: 10.3354/esr00924] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Félix F, Haase B. A new record of the Blackish Oystercatcher, Haematopus ater ater (Vieillot and Oudart, 1825), in the Gulf of Guayaquil, Ecuador. cl 2016. [DOI: 10.15560/12.2.1857] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
We report a record of a single individual of the Blackish Oystercatcher, Haematopus ater ater (Vieillot and Oudart, 1825), photographed on 7 February 2015 in the Gulf of Guayaquil, Ecuador (02.73° S, 080.22° W). This species regularly occurs along rocky sea coasts, mainly in cold and temperate areas of South America. The record was observed during the warmest season and when an ongoing ENSO event in the Southeast Pacific has been confirmed. We discuss two potential causes for this unusual record: variability of environment conditions and population expansion from the Peruvian population.
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Wiesmann F, Naeth G, Haase B, Braun P, Knechten H. Evaluation of two assays for the quantification of HIV and HCV in clinical routine. J Clin Virol 2015. [DOI: 10.1016/j.jcv.2015.07.214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Haase B, Rieder S, Leeb T. Two variants in the KIT gene as candidate causative mutations for a dominant white and a white spotting phenotype in the donkey. Anim Genet 2015; 46:321-4. [PMID: 25818843 DOI: 10.1111/age.12282] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/04/2014] [Indexed: 11/28/2022]
Abstract
White spotting phenotypes have been intensively studied in horses, and although similar phenotypes occur in the donkey, little is known about the molecular genetics underlying these patterns in donkeys. White spotting in donkeys can range from only a few white areas to almost complete depigmentation and is characterised by a loss of pigmentation usually progressing from a white spot in the hip area. Completely white-born donkeys are rare, and the phenotype is characterised by the complete absence of pigment resulting in pink skin and a white coat. A dominant mode of inheritance has been demonstrated for spotting in donkeys. Although the mode of inheritance for the completely white phenotype in donkeys is not clear, the phenotype shows similarities to dominant white in horses. As variants in the KIT gene are known to cause a range of white phenotypes in the horse, we investigated the KIT gene as a potential candidate gene for two phenotypes in the donkey, white spotting and white. A mutation analysis of all 21 KIT exons identified a missense variant in exon 4 (c.662A>C; p.Tyr221Ser) present only in a white-born donkey. A second variant affecting a splice donor site (c.1978+2T>A) was found exclusively in donkeys with white spotting. Both variants were absent in 24 solid-coloured controls. To the authors' knowledge, this is the first study investigating genetic mechanisms underlying white phenotypes in donkeys. Our results suggest that two independent KIT alleles are probably responsible for white spotting and white in donkeys.
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Affiliation(s)
- B Haase
- Faculty of Veterinary Science, University of Sydney, Sydney, 2006, NSW, Australia
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Blatter M, Haase B, Gerber V, Poncet PA, Leeb T, Rieder S, Henke D, Janett F, Burger D. [Clinical evaluation of the new coat colour macchiato in a male Franches-Montagnes horse]. SCHWEIZ ARCH TIERH 2015; 155:229-32. [PMID: 23531944 DOI: 10.1024/0036-7281/a000451] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
In April 2008 a Franches-Montagnes colt was born with an unusual coat colour phenotype which had never been observed in that population before. The foal showed extended white markings on body and legs, a white head and blue eyes. As both parents have an unremarkable bay coat colour phenotype, a de novo mutation was expected in the offspring and a candidate gene approach revealed a spontaneous mutation in the microphthalmia associated transcription factor gene (MITF). A detailed clinical examination in 2010 indicated an impaired hearing capacity. As in the American Paint Horse large white facial markings in combination with blue eyes are associated with deafness, the hearing capacity of the stallion was closer examined performing brainstem auditory-evoked responses (BAER). The BAER confirmed bilateral deafness in the Franches-Montagnes colt. It is assumed that the deafness is caused by a melanocyte deficiency caused by the MITF gene mutation. Unfortunately, due to castration of the horse, the causal association between the mutation in the MITF gene and clinical findings cannot be confirmed by experimental matings.
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Affiliation(s)
- M Blatter
- Institut Suisse de Médicine Equine, ALP-Haras und Universität Bern.
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Haase B, Alava JJ. First records of chewing lice (Phthiraptera: Menoponidae) in Pacific migratory shorebirds wintering in Ecuador. Rev Bras Parasitol Vet 2014; 23:260-3. [PMID: 25054510 DOI: 10.1590/s1984-29612014026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Accepted: 01/22/2014] [Indexed: 11/21/2022]
Abstract
Chewing lice were collected from small shorebirds (Charadriformes: Scolopacidae) overwintering in foraging grounds of coastal Ecuador. On 27 occasions at least one louse (3.7%) was collected from six host species. Based on external morphological characters, at least two species of chewing lice could be preliminary identified (family: Menoponidae), including Actornithophilus umbrinus (Burmeister, 1842) and Austromenopon sp. A. umbrinus was found in the Western Sandpiper (Calidris mauri), Least Sandpiper (C. minutilla), Stilt Sandpiper (C. himantopus), Semipalmated Plover (Charadrius semipalmatus) and Wilson's phalarope (Phalaropus tricolor), while Austromenopon sp. is presumably the first record collected from the Surfbird (Aphriza virgata). These findings indicate that the distribution of these chewing lice species covers at least the regions around the equator (latitude 0°) until the Arctic in the north, but probably also includes the entire winter distribution area of the host species. This is the first study of chewing lice from Ecuador's mainland coast and more research is required to understand the host-parasite ecology and ectoparasitic infection in shorebirds stopping over the region.
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Affiliation(s)
- Ben Haase
- Museo de Ballenas, Museo de Ballenas, Salinas, Ecuador
| | - Juan José Alava
- Fundación Ecuatoriana para el Estudio de Mamíferos Marinos ? FEMM, Guayaquil, Ecuador
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Häring T, Haase B, Zini E, Hartnack S, Uebelhart D, Gaudenz D, Wichert BA. Overweight and impaired insulin sensitivity present in growing cats. J Anim Physiol Anim Nutr (Berl) 2012; 97:813-9. [DOI: 10.1111/j.1439-0396.2012.01322.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Gabreski NA, Haase B, Armstrong CD, Distl O, Brooks SA. Investigation of allele frequencies for Lavender foal syndrome in the horse. Anim Genet 2012; 43:650. [DOI: 10.1111/j.1365-2052.2011.02305.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/09/2011] [Indexed: 10/14/2022]
Affiliation(s)
- N. A. Gabreski
- Department of Animal Science; Cornell University; Ithaca; NY; 14853; USA
| | - B. Haase
- Faculty of Veterinary Science; University of Sydney; B19-513 RMC Gunn; Sydney; 2006; NSW; Australia
| | | | - O. Distl
- Ottmar Distl, Institute for Animal Breeding and Genetics; University of Veterinary Medicine Hannover; 30559; Hannover; Germany
| | - S. A. Brooks
- Department of Animal Science; Cornell University; Ithaca; NY; 14853; USA
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Hasler H, Flury C, Menet S, Haase B, Leeb T, Simianer H, Poncet P, Rieder S. Genetic diversity in an indigenous horse breed - implications for mating strategies and the control of future inbreeding. J Anim Breed Genet 2011; 128:394-406. [DOI: 10.1111/j.1439-0388.2011.00932.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Haase B, Rieder S, Tozaki T, Hasegawa T, Penedo MCT, Jude R, Leeb T. Five novel KIT mutations in horses with white coat colour phenotypes. Anim Genet 2011; 42:337-9. [DOI: 10.1111/j.1365-2052.2011.02173.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Bellone RR, Archer S, Wade CM, Cuka-Lawson C, Haase B, Leeb T, Forsyth G, Sandmeyer L, Grahn B. Association analysis of candidate SNPs in TRPM1 with leopard complex spotting (LP ) and congenital stationary night blindness (CSNB) in horses. Anim Genet 2010. [DOI: 10.1111/j.1365-2052.2010.02119.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Schmitz A, Demmel S, Peters LM, Leeb T, Mevissen M, Haase B. Comparative human-horse sequence analysis of the CYP3A subfamily gene cluster. Anim Genet 2010; 41 Suppl 2:72-9. [DOI: 10.1111/j.1365-2052.2010.02111.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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van der Plas HC, Haase B, Zuurdeeg B, Vollering MC. Ring transformations in reactions of heterocyclic halogeno compounds with nucleophiles (V): Conversion of some 2-alkyl-, 2-aryl- and 2,5-dialkyl-4-chloropyrimidines by potassium amide in liquid ammonia into 4-alkyl derivatives of 2-alkyl- or 2-aryl-s-tria. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/recl.19660851104] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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22
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Morina R, Knorr C, Haase B, Leeb T, Seuberlich T, Zurbriggen A, Brem G, Schütz E, Brenig B. Molecular analysis of carbohydrate N-acetylgalactosamine 4-O sulfotransferase 8 (CHST8) as a candidate gene for bovine spongiform encephalopathy susceptibility. Anim Genet 2010; 41:85-8. [PMID: 19744145 DOI: 10.1111/j.1365-2052.2009.01951.x] [Citation(s) in RCA: 2] [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] [Indexed: 11/29/2022]
Abstract
Endogenous prion proteins (PrP) play the central role in the pathogenesis of transmissible spongiform encephalopathies. The carbohydrate N-acetylgalactosamine 4-O sulfotransferase 8 (CHST8) promotes the conversion of the cellular PrP(C) into the pathogenic PrP(d). Six sequence variants within the CHST8 gene were identified by comparative sequencing and genotyped for a sample of 623 animals comprising bovine spongiform encephalopathy (BSE)-affected and healthy control cows representing German Fleckvieh (German Simmental), German Holstein (Holstein-Friesian) and Brown Swiss. Significant differences in the allele, genotype and haplotype frequencies between BSE-affected and healthy cows indicate an association of sequence variant g.37254017G>T with the development of the disease in Brown Swiss cattle.
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Affiliation(s)
- R Morina
- Institute of Veterinary Medicine, Georg-August University, Goettingen, Germany
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Haase B, Brooks SA, Tozaki T, Burger D, Poncet PA, Rieder S, Hasegawa T, Penedo C, Leeb T. Seven novel KIT mutations in horses with white coat colour phenotypes. Anim Genet 2009; 40:623-9. [PMID: 19456317 DOI: 10.1111/j.1365-2052.2009.01893.x] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
White coat colour in horses is inherited as a monogenic autosomal dominant trait showing a variable expression of coat depigmentation. Mutations in the KIT gene have previously been shown to cause white coat colour phenotypes in pigs, mice and humans. We recently also demonstrated that four independent mutations in the equine KIT gene are responsible for the dominant white coat colour phenotype in various horse breeds. We have now analysed additional horse families segregating for white coat colour phenotypes and report seven new KIT mutations in independent Thoroughbred, Icelandic Horse, German Holstein, Quarter Horse and South German Draft Horse families. In four of the seven families, only one single white horse, presumably representing the founder for each of the four respective mutations, was available for genotyping. The newly reported mutations comprise two frameshift mutations (c.1126_1129delGAAC; c.2193delG), two missense mutations (c.856G>A; c.1789G>A) and three splice site mutations (c.338-1G>C; c.2222-1G>A; c.2684+1G>A). White phenotypes in horses show a remarkable allelic heterogeneity. In fact, a higher number of alleles are molecularly characterized at the equine KIT gene than for any other known gene in livestock species.
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Affiliation(s)
- B Haase
- Institute of Genetics, Vetsuisse Faculty, University of Bern, Bremgartenstrasse 109a, 3001 Bern, Switzerland
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Welle M, Philipp U, Rufenacht S, Roosje P, Scharfenstein M, Schutz E, Brenig B, Linek M, Mecklenburg L, Grest P, Drogemuller M, Haase B, Leeb T, Drogemuller C. MLPH Genotype--Melanin Phenotype Correlation in Dilute Dogs. J Hered 2009. [DOI: 10.1093/jhered/esp010] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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Haase B, Jude R, Brooks SA, Leeb T. An equine chromosome 3 inversion is associated with the tobiano spotting pattern in German horse breeds. Anim Genet 2008; 39:306-9. [DOI: 10.1111/j.1365-2052.2008.01715.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Härtel C, Osthues I, Rupp J, Haase B, Röder K, Göpel W, Herting E, Schultz C. Characterisation of the host inflammatory response to Staphylococcus epidermidis in neonatal whole blood. Arch Dis Child Fetal Neonatal Ed 2008; 93:F140-5. [PMID: 18006567 DOI: 10.1136/adc.2007.124685] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND Coagulase-negative staphylococci (CoNS) are the most prevalent pathogens causing late-onset sepsis, and gestational age is the most important risk factor for these infections. OBJECTIVE To characterise innate immune responses to S epidermidis by assessment of whole blood in vitro cytokine production in a large group of preterm and term infants. RESULTS The S epidermidis-induced in vitro production of proinflammatory cytokines such as intracytoplasmic interleukin (IL) 6 and tumour necrosis factor alpha in cord blood samples was found to be dependent on gestational age (R = 0.279, 95% CI 0.10 to 0.44, p = 0.002; R = 0.251, 95% CI 0.07 to 0.41, p = 0.005, respectively; n = 121). In contrast, the production of anti-inflammatory cytokines such as IL10 and transforming growth factor beta was not associated with gestational age. When different stimulation strategies were compared, a strong correlation was noted for cytokine responses after lipopolysaccharide and S epidermidis exposure--that is, IL6 (R = 0.431, 95% CI 0.29 to 0.55, p<0.001, n = 161) and IL10 (R = 0.332, 95% CI 0.18 to 0.47, p<0.001, n = 161). In addition, a lower IL6 production was found in supernatants of whole blood cultures infected with a clinically isolated IcaABD-positive (biofilm production) strain compared with a control IcaABD-negative ATCC strain (p = 0.009). CONCLUSIONS These in vitro data suggest that proinflammatory responses to S epidermidis are dependent on gestational age in preterm infants, whereas the counteracting anti-inflammatory response to S epidermidis may not be directly related to gestational age. Individual host factors may have a role as well as bacterial determinants, such as biofilm production. Further studies are encouraged to investigate the different aspects of innate immune responses to CoNS in vivo.
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Affiliation(s)
- C Härtel
- Department of Paediatrics, University of Lübeck, Ratzeburger Allee 160, D-23538 Lübeck, Germany.
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Van Bressem MF, Reyes JC, Félix F, Echegaray M, Siciliano S, Di Beneditto AP, Flach L, Viddi F, Avila IC, Herrera JC, Tobón IC, Bolaños-Jiménez J, Moreno IB, Ott PH, Sanino GP, Castineira E, Montes D, Crespo E, Flores PAC, Haase B, Souza SMFM, Laeta M, Fragoso AB. A preliminary overview of skin and skeletal diseases and traumata in small cetaceans from South American waters. ACTA ACUST UNITED AC 2007. [DOI: 10.5597/lajam00108] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Abstract
A 7.25 m long male humpback whale (Megaptera novaeangliae) with spondylitis was found beached on August 13, 1994 at Ancon, Ecuador (2 degrees 23' S, 80 degrees 47' W). The condition involved at least 11 vertebrae, 7 lumbar (L4 to L11) and 4 caudal (Ca1 to Ca4). Partial fusion of vertebrae was observed as a result of intervertebral bony proliferation, likely impeding full motion. The relatively young age of this specimen and the severity of the deformities suggest an infectious, rather than degenerative, process. The gross findings are most consistent with some type of spondyloarthritis. Although this condition has previously been identified in a number of cetacean species, the pathogenesis, population impact and ecologic implications have not been fully assessed. This is the third case described for humpback whales and the first for a humpback whale from the SE Pacific.
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Affiliation(s)
- Fernando Félix
- Fundación Ecuatoriana para el Estudio de Mamíferos Marinos (FEMM), PO Box 09-01-11905, Guayaquil, Ecuador.
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Leeb T, Dolle K, Haase B. Sequence analysis of the porcine IFNAR1 and IFNGR2 genes. Cytogenet Genome Res 2006; 115:134-7. [PMID: 17065794 DOI: 10.1159/000095233] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2006] [Accepted: 04/10/2006] [Indexed: 11/19/2022] Open
Abstract
A porcine BAC clone harboring the tightly linked IFNAR1 and IFNGR2 genes was identified by comparative analysis of the publicly available porcine BAC end sequences. The complete 168,835 bp insert sequence of this clone was determined. Sequence comparisons of the genomic sequence with EST sequences from public databases were performed and allowed a detailed annotation of the IFNAR1 and IFNGR2 genes. The analyzed genes showed a conserved genomic organization with their known mammalian orthologs, however the sequence conservation of these genes across species was relatively low. In addition to the IFNAR1 and IFNGR2 genes, which were completely sequenced, the analyzed BAC clone also contained parts of an orphan gene encoding a putative transmembrane protein (TMEM50B). In contrast to the IFNAR1 and IFNGR2 genes the sequence conservation of the TMEM50B gene across different mammalian species was extremely high.
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Affiliation(s)
- T Leeb
- Institute of Genetics, Vetsuisse Faculty, University of Berne, Berne, Switzerland.
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Axt VM, Kuhn T, Haase B, Neukirch U, Gutowski J. Estimating the memory time induced by exciton-exciton scattering. Phys Rev Lett 2004; 93:127402. [PMID: 15447306 DOI: 10.1103/physrevlett.93.127402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2003] [Indexed: 05/24/2023]
Abstract
It is shown that lower bounds for the effective memory time induced by two-pair correlations can be estimated by monitoring changes of the shape of excitonic four-wave-mixing spectra. Experimentally we demonstrate a memory time of at least 540 fs for a ZnSe single quantum well. Microscopic calculations reveal that this lower bound is not sharp. Interactions retarded by more than 800 fs are shown to influence the dynamics, reflecting the presence of a long time tail in the memory kernel.
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Affiliation(s)
- V M Axt
- Institut für Festkörpertheorie, Westfälische-Wilhelms Universität, Wilhelm-Klemm-Strasse 10, 48149 Münster, Germany
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Niendorf A, Von Frese J, Haase B, Geffers R, Bendrat K, Rhode T, Schütze K, Berger J, Gatzemeier U, Branscheid D. Gene expression in microdissected lung cancer samples from a large high-quality tissue collection reveals diagnostic and prognostic information that surpasses conventional histology. J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.7029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- A. Niendorf
- Gemeinschaftspraxis für Pathologie, Hamburg, Germany; Chemometrie, Inst. für Anorg. und Anal. Chemie, Münster, Germany; Affymetrix UK Limited, High Wycombe, United Kingdom; GBF, Braunschweig, Germany; MEDEEA Forschungs-GmbH, Hamburg, Germany; P.A.L.M. Microlaser Technologies AG, Bernried, Germany; Inst. Med. Inform., Biometrie und Epidemiol., UKE, Hamburg, Germany; Abt. Onkologie Krankenhaus Groβhansdorf, Groβhansdorf, Germany; Abt. Thoraxchirurgie, Krankenhaus Groβhansdorf, Groβhansdorf, Germany
| | - J. Von Frese
- Gemeinschaftspraxis für Pathologie, Hamburg, Germany; Chemometrie, Inst. für Anorg. und Anal. Chemie, Münster, Germany; Affymetrix UK Limited, High Wycombe, United Kingdom; GBF, Braunschweig, Germany; MEDEEA Forschungs-GmbH, Hamburg, Germany; P.A.L.M. Microlaser Technologies AG, Bernried, Germany; Inst. Med. Inform., Biometrie und Epidemiol., UKE, Hamburg, Germany; Abt. Onkologie Krankenhaus Groβhansdorf, Groβhansdorf, Germany; Abt. Thoraxchirurgie, Krankenhaus Groβhansdorf, Groβhansdorf, Germany
| | - B. Haase
- Gemeinschaftspraxis für Pathologie, Hamburg, Germany; Chemometrie, Inst. für Anorg. und Anal. Chemie, Münster, Germany; Affymetrix UK Limited, High Wycombe, United Kingdom; GBF, Braunschweig, Germany; MEDEEA Forschungs-GmbH, Hamburg, Germany; P.A.L.M. Microlaser Technologies AG, Bernried, Germany; Inst. Med. Inform., Biometrie und Epidemiol., UKE, Hamburg, Germany; Abt. Onkologie Krankenhaus Groβhansdorf, Groβhansdorf, Germany; Abt. Thoraxchirurgie, Krankenhaus Groβhansdorf, Groβhansdorf, Germany
| | - R. Geffers
- Gemeinschaftspraxis für Pathologie, Hamburg, Germany; Chemometrie, Inst. für Anorg. und Anal. Chemie, Münster, Germany; Affymetrix UK Limited, High Wycombe, United Kingdom; GBF, Braunschweig, Germany; MEDEEA Forschungs-GmbH, Hamburg, Germany; P.A.L.M. Microlaser Technologies AG, Bernried, Germany; Inst. Med. Inform., Biometrie und Epidemiol., UKE, Hamburg, Germany; Abt. Onkologie Krankenhaus Groβhansdorf, Groβhansdorf, Germany; Abt. Thoraxchirurgie, Krankenhaus Groβhansdorf, Groβhansdorf, Germany
| | - K. Bendrat
- Gemeinschaftspraxis für Pathologie, Hamburg, Germany; Chemometrie, Inst. für Anorg. und Anal. Chemie, Münster, Germany; Affymetrix UK Limited, High Wycombe, United Kingdom; GBF, Braunschweig, Germany; MEDEEA Forschungs-GmbH, Hamburg, Germany; P.A.L.M. Microlaser Technologies AG, Bernried, Germany; Inst. Med. Inform., Biometrie und Epidemiol., UKE, Hamburg, Germany; Abt. Onkologie Krankenhaus Groβhansdorf, Groβhansdorf, Germany; Abt. Thoraxchirurgie, Krankenhaus Groβhansdorf, Groβhansdorf, Germany
| | - T. Rhode
- Gemeinschaftspraxis für Pathologie, Hamburg, Germany; Chemometrie, Inst. für Anorg. und Anal. Chemie, Münster, Germany; Affymetrix UK Limited, High Wycombe, United Kingdom; GBF, Braunschweig, Germany; MEDEEA Forschungs-GmbH, Hamburg, Germany; P.A.L.M. Microlaser Technologies AG, Bernried, Germany; Inst. Med. Inform., Biometrie und Epidemiol., UKE, Hamburg, Germany; Abt. Onkologie Krankenhaus Groβhansdorf, Groβhansdorf, Germany; Abt. Thoraxchirurgie, Krankenhaus Groβhansdorf, Groβhansdorf, Germany
| | - K. Schütze
- Gemeinschaftspraxis für Pathologie, Hamburg, Germany; Chemometrie, Inst. für Anorg. und Anal. Chemie, Münster, Germany; Affymetrix UK Limited, High Wycombe, United Kingdom; GBF, Braunschweig, Germany; MEDEEA Forschungs-GmbH, Hamburg, Germany; P.A.L.M. Microlaser Technologies AG, Bernried, Germany; Inst. Med. Inform., Biometrie und Epidemiol., UKE, Hamburg, Germany; Abt. Onkologie Krankenhaus Groβhansdorf, Groβhansdorf, Germany; Abt. Thoraxchirurgie, Krankenhaus Groβhansdorf, Groβhansdorf, Germany
| | - J. Berger
- Gemeinschaftspraxis für Pathologie, Hamburg, Germany; Chemometrie, Inst. für Anorg. und Anal. Chemie, Münster, Germany; Affymetrix UK Limited, High Wycombe, United Kingdom; GBF, Braunschweig, Germany; MEDEEA Forschungs-GmbH, Hamburg, Germany; P.A.L.M. Microlaser Technologies AG, Bernried, Germany; Inst. Med. Inform., Biometrie und Epidemiol., UKE, Hamburg, Germany; Abt. Onkologie Krankenhaus Groβhansdorf, Groβhansdorf, Germany; Abt. Thoraxchirurgie, Krankenhaus Groβhansdorf, Groβhansdorf, Germany
| | - U. Gatzemeier
- Gemeinschaftspraxis für Pathologie, Hamburg, Germany; Chemometrie, Inst. für Anorg. und Anal. Chemie, Münster, Germany; Affymetrix UK Limited, High Wycombe, United Kingdom; GBF, Braunschweig, Germany; MEDEEA Forschungs-GmbH, Hamburg, Germany; P.A.L.M. Microlaser Technologies AG, Bernried, Germany; Inst. Med. Inform., Biometrie und Epidemiol., UKE, Hamburg, Germany; Abt. Onkologie Krankenhaus Groβhansdorf, Groβhansdorf, Germany; Abt. Thoraxchirurgie, Krankenhaus Groβhansdorf, Groβhansdorf, Germany
| | - D. Branscheid
- Gemeinschaftspraxis für Pathologie, Hamburg, Germany; Chemometrie, Inst. für Anorg. und Anal. Chemie, Münster, Germany; Affymetrix UK Limited, High Wycombe, United Kingdom; GBF, Braunschweig, Germany; MEDEEA Forschungs-GmbH, Hamburg, Germany; P.A.L.M. Microlaser Technologies AG, Bernried, Germany; Inst. Med. Inform., Biometrie und Epidemiol., UKE, Hamburg, Germany; Abt. Onkologie Krankenhaus Groβhansdorf, Groβhansdorf, Germany; Abt. Thoraxchirurgie, Krankenhaus Groβhansdorf, Groβhansdorf, Germany
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Nebel S, Lank DB, O'Hara PD, Fernández G, Haase B, Delgado F, Estela FA, Ogden LJE, Harrington B, Kus BE, Lyons JE, Mercier F, Ortego B, Takekawa JY, Warnock N, Warnock SE. Western Sandpipers (Calidris Mauri) During the Nonbreeding Season: Spatial Segregation on a Hemispheric Scale. ACTA ACUST UNITED AC 2002. [DOI: 10.1093/auk/119.4.922] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
The nonbreeding distribution of Western Sandpipers (Calidris mauri) was documented using 19 data sets from 13 sites along the Pacific and Atlantic coasts of the Americas. Western Sandpipers showed latitudinal segregation with regard to sex and age. Females wintered farther south than males. A “U” shaped pattern was found with respect to age, with juveniles occurring at higher proportions at both the northern and southern ends of the range. Distribution of sexes might be affected by differences in bill length and a latitudinal trend in depth distribution of prey. For age class distribution, two different life-history tactics of juveniles might exist that are related to the higher cost of feather wear for juveniles compared to adults. Most juveniles complete three long-distance migrations on one set of flight feathers whereas adults complete two. Juveniles may winter either far north, thereby reducing feather wear induced by ultraviolet light, migration, or both, or far south and spend the summer on the nonbreeding area.
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Affiliation(s)
- Silke Nebel
- Department of BioSciences, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada
| | - David B. Lank
- Department of BioSciences, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada
| | - Patrick D. O'Hara
- Department of BioSciences, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada
| | - Guillermo Fernández
- Department of BioSciences, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada
| | - Ben Haase
- ℅ FEMM, casilla 0901, 11 905 Guayaquil, Ecuador
| | | | | | - Lesley J. Evans Ogden
- Department of BioSciences, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada
| | - Brian Harrington
- Manomet Center for Conservation Sciences, P.O. Box 1770, Manomet, Massachusetts 02345, USA
| | - Barbara E. Kus
- U.S. Geological Survey, Western Ecological Research Center, San Diego Field Station, 5745 Kearny Villa Road, Suite M, San Diego, California 92123, USA
| | - James E. Lyons
- Department of Zoology, North Carolina State University, Raleigh, North Carolina 27695-7617, USA
| | | | - Brent Ortego
- Texas Parks and Wildlife Department, 2805 North Navarro, Suite 600B, Victoria, Texas 77901, USA
| | - John Y. Takekawa
- U.S. Geological Survey, Western Ecological Research Center, San Francisco Bay Estuary Field Station, P.O. Box 2012, Vallejo, California 94592, USA
| | - Nils Warnock
- Point Reyes Bird Observatory, 4990 Shoreline Highway, Stinson Beach, California 94970, USA
| | - Sarah E. Warnock
- Point Reyes Bird Observatory, 4990 Shoreline Highway, Stinson Beach, California 94970, USA
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Reuland P, Geiger L, Thelen MH, Handgretinger R, Haase B, Müller-Schauenburg W, Niethammer D, Bares R. Follow-up in neuroblastoma: comparison of metaiodobenzylguanidine and a chimeric anti-GD2 antibody for detection of tumor relapse and therapy response. J Pediatr Hematol Oncol 2001; 23:437-42. [PMID: 11878578 DOI: 10.1097/00043426-200110000-00009] [Citation(s) in RCA: 31] [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: 10/27/2022]
Abstract
Early and correct diagnosis of local tumor recurrence, occurrence of metastases, and therapy response are essential in patients with neuroblastoma stage IV. The aim of the study was to evaluate the diagnostic value of metaiodobenzylguanidine (mIBG) and a chimeric GD2 antibody in the follow-up of patients with neuroblastoma. In a prospective study, mIBG (N = 31 scans) and immunoscintigraphy were compared with a chimeric antiganglioside antibody, ch14.18 (MAb) (N = 31 scans), labeled with technetium Tc 99m in the follow-up of 18 patients with stage IV neuroblastoma. The findings were compared with histologic findings, other imaging examinations, and clinical changes over the course of 4 to 6 years. For the diagnosis of local tumor recurrences, sensitivity was 80% for MAb and 70% for mIBG. Specificity was 93% for MAb and 72% for mIBG. The MAb was superior for the detection of skeletal metastases, with a sensitivity of 82% compared with 72% for mIBG. Specificity was 100% for both techniques. Also, for soft tissue/lymph node metastases, sensitivity for MAb was higher (50%) than for mIBG (31%). Specificity was 100% for each technique. In sequential studies, metastases were detected earlier with MAb (mean: 2.3 m for skeletal metastases, 3.6 m for soft tissue metastases) than with mIBG. After therapy, tumor uptake was visualized longer with mIBG (mean 6.3 m) than with MAb. The chimeric antibody ch14.18 is likely to be valuable for follow-up examinations and for assessment of therapy response because of earlier detection of new metastases.
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Affiliation(s)
- P Reuland
- Department of Nuclear Medicine, University of Tübingen, FRG, Germany
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35
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Axt VM, Haase B, Neukirch U. Influence of two-pair continuum correlations following resonant excitation of excitons. Phys Rev Lett 2001; 86:4620-4623. [PMID: 11384298 DOI: 10.1103/physrevlett.86.4620] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2000] [Indexed: 05/23/2023]
Abstract
The memory structure induced by coherent transitions to the exciton-exciton scattering continuum is shown to have significant influence on spectrally resolved four-wave-mixing signals even under selective excitation of 1s excitons. Comparisons between experiments and calculations that account nonperturbatively for these quantum kinetic Coulomb correlations demonstrate large compensations between mean-field contributions and transitions to the two-pair continuum. Experiments with different polarizations of the laser pulses show that two-pair continuum correlations are responsible for delay-time dependent shifts of the excitonic emission as well as for substantial deformations of the line shape.
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Affiliation(s)
- V M Axt
- Institut für Festkörpertheorie, Westfälische Wilhelms Universität Münster, Wilhelm-Klemm-Strasse 10, D-48149 Münster, Germany
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Medina E, Molinari G, Rohde M, Haase B, Chhatwal GS, Guzmán CA. Fc-mediated nonspecific binding between fibronectin-binding protein I of Streptococcus pyogenes and human immunoglobulins. J Immunol 1999; 163:3396-402. [PMID: 10477610] [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: 02/13/2023]
Abstract
Fibronectin-binding protein I (SfbI) from Streptococcus pyogenes plays a key role in bacterial adhesion to, and invasion of, eukaryotic cells. In addition, SfbI exhibits a considerable potential as mucosal adjuvant and can trigger polyclonal activation of B cells. Here, we report that SfbI is also capable of binding human IgG in a nonimmune fashion. SfbI was reactive with IgG1, IgG2, IgG3, and IgG4 isotypes (type IIo IgG-binding profile). The affinity constant (Kd) of the SfbI-IgG interaction was in the range of 1-2 x 10(-5) M. Further studies demonstrated that the SfbI binding was mediated by the Fc component of the IgG molecule. Experiments performed using purified recombinant proteins spanning different domains of SfbI showed that the IgG-binding activity was restricted to the fibronectin-binding domains, and in particular to the fibronectin-binding repeats. Finally, the presence of recombinant SfbI resulted in an impairment of both phagocytosis of IgG-coated RBCs and Ab-dependent cell cytotoxicity by macrophages. These results demonstrated for the first time that, in addition to its major role during the colonization process, SfbI may also favor bacterial immune evasion after the onset of the infection by interfering with host clearance mechanisms.
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Affiliation(s)
- E Medina
- Department of Microbial Pathogenicity and Vaccine Research, Division of Microbiology, GBF-National Research Center for Biotechnology, Braunschweig, Germany
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37
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Matter H, Schwab W, Barbier D, Billen G, Haase B, Neises B, Schudok M, Thorwart W, Schreuder H, Brachvogel V, Lönze P, Weithmann KU. Quantitative structure-activity relationship of human neutrophil collagenase (MMP-8) inhibitors using comparative molecular field analysis and X-ray structure analysis. J Med Chem 1999; 42:1908-20. [PMID: 10354399 DOI: 10.1021/jm980631s] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.3] [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: 11/30/2022]
Abstract
A set of 90 novel 2-(arylsulfonyl)-1,2,3, 4-tetrahydroisoquinoline-3-carboxylates and -hydroxamates as inhibitors of the matrix metalloproteinase human neutrophil collagenase (MMP-8) was designed, synthesized, and investigated by 3D-QSAR techniques (CoMFA, CoMSIA) and X-ray structure analysis. Docking studies of a reference compound are based on crystal structures of MMP-8 complexed with peptidic inhibitors to propose a model of its bioactive conformation. This model was validated by a 1. 7 A X-ray structure of the catalytic domain of MMP-8. The 3D-QSAR models based on a superposition rule derived from these docking studies were validated using conventional and cross-validated r2 values using the leave-one-out method, repeated analyses using two randomly chosen cross-validation groups plus randomization of biological activities. This led to consistent and highly predictive 3D-QSAR models with good correlation coefficients for both CoMFA and CoMSIA, which were found to correspond to experimentally determined MMP-8 catalytic site topology in terms of steric, electrostatic, and hydrophobic complementarity. Subsets selected as smaller training sets using 2D fingerprints and maximum dissimilarity methods resulted in 3D-QSAR models with remarkable correlation coefficients and a high predictive power. This allowed to compensate the weaker zinc binding properties of carboxylates by introducing optimal fitting P1' residues. The final QSAR information agrees with all experimental data for the binding topology and thus provides clear guidelines and accurate activity predictions for novel MMP-8 inhibitors.
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Affiliation(s)
- H Matter
- Chemical Research & Core Research Functions, Hoechst Marion Roussel, D-65926 Frankfurt am Main, Germany.
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38
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Haase B. Determination of weak optical pulses in amplitude and phase by measurement of the transient polarization state. Opt Lett 1999; 24:543-545. [PMID: 18071566 DOI: 10.1364/ol.24.000543] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Unlike in established methods, the phase of an optical pulse is calculated from a single time transient in combination with a single spectrum of its polarization state: For dynamically changing elliptical polarizations the vectorial nature of the electromagnetic radiation results in two independent constraints that uniquely determine the chirp and the spectral phase. The practical feasibility of the method is demonstrated, a phase of a four-wave-mixing signal from a semiconductor single quantum well with a pulse energy of only 0.5 fJ is determined, and the accuracy of the setup is analyzed by a numerical simulation.
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39
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Hoxie NJ, Chen MH, Prieve A, Haase B, Pfister J, Vergeront JM. HIV seroprevalence among male prison inmates in the Wisconsin Correctional System. WMJ 1998; 97:28-31. [PMID: 9617305] [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: 02/07/2023]
Abstract
OBJECTIVE To estimate HIV seroprevalence and the acceptance of voluntary HIV testing among male inmates entering the Wisconsin Correctional System during July 1, 1994-June 30, 1995, and compare these estimates with similar data obtained in 1987-1988. METHODS A blinded HIV seroprevalence survey concurrent with a review of voluntary HIV antibody testing records. RESULTS HIV test results were obtained for 3,681 (89%) male prison entrants during the study period; 26 (0.7%) were HIV-1 seropositive. Based on this estimate and the total number of male prison entrants (4,134), an estimated 29 HIV-1 seropositive male inmates entered the Wisconsin Correctional System during the study period. Eighty-four percent of all inmates were tested voluntarily. Among inmates testing HIV-1 seropositive, 69% were tested voluntarily. CONCLUSIONS These data suggest that HIV-1 seroprevalence among male prison inmates in Wisconsin is low, and is unchanged from the late 1980s; however, a large increase in the prison population has resulted in a substantial increase in the absolute number of HIV-1 seropositive inmates entering the correctional system. Although overall acceptance of voluntary HIV testing is high, nearly one third of HIV-1 seropositive inmates declined voluntary HIV testing.
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Affiliation(s)
- N J Hoxie
- Wisconsin Division of Health, Madison, USA
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Abstract
We have previously described a monoclonal antibody (mAb), 10C3, directed against the gene-3 protein (g3p) of filamentous phage M13, which was produced to study g3p fusion protein expression in Escherichia coli and its incorporation in the phage capsid [Tesar, M., Beckmann, C., Röttgen, P., Haase, B., Faude, U., Timmis, K., 1995. Monoclonal antibody against pIII of filamentous phage: an immunological tool to study pIII fusion protein expression in phage display systems. Immunology 1, 53-54]. In this study we report mapping of the antigenic epitope of the mAb 10C3, by means of short overlapping peptide-sequences [Frank, R., Overwin, H., 1996. Spot synthesis. In: Morris, G.E. (Ed.), Methods in Molecular Biology, Vol. 66: Epitope Mapping Protocols. Humana Press, Totowa, NJ, pp. 149-169.] comprising the C-terminal half of the g3-protein. A minimal recognizable peptide was found which is represented in the 11 amino acid sequence from positions 292 to 302 of g3p [Wezenbeek van, P.M.G.P., Hulsebos, T.J.M., Schoenmakers, J.G.G., 1980. Nucleotide sequence of the filamentous bacteriophage M13 DNA genome: comparison with phage fd. Gene 11, 129-148]. In order to use the antibody also for detection and purification of recombinant proteins, such as single chain antibodies, the epitope was introduced as a tag sequence into the phagemid pHEN1 [Hoogenboom, H.R., Griffith, A.D., Johnson, K., Chiswell, D.J., Hudson, P., Winter, G., 1991. Multi-subunit proteins on the surface of the filamentous phage: methodologies for displaying antibody (Fab) heavy and light chains. Nucleic Acid Res. 19, 4133-4137; Nissim, A., Hoogenboom, H.R., Tomlinson, I.M., Flynn, G., Midgley, C., Lane, D., Winter, G., 1994. Antibody fragments from a single pot phage display library as immunochemical reagents. EMBO J. 13 (3) 692-698]. Purified single chain antibodies containing this tag were detectable down to a concentration of 2 ng ml(-1) under non-denaturing conditions (ELISA) or 4 ng per lane on immunoblots. The high sensitivity of the antibody for the peptide tag was reflected in the antibody affinity constant K(D) of 6.80 x 10(-10) M, which was determined by real time biomolecular interaction analysis (BIA) based on surface plasmon resonance (SPR) [Karlsson, R., Fält, A., 1997. Experimental design for kinetic analysis of protein-protein interactions with surface plasmon resonance biosensors. J. Immunol. Methods 200, 121-133]. Finally, recombinant proteins in E. coli periplasmic extracts could be purified in a single step by affinity purification using immobilized mAb 10C3. These studies demonstrated that the new peptide-tag and its corresponding mAb represents a versatile tool for the detection of recombinant proteins selected by phage display technology.
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Affiliation(s)
- C Beckmann
- Division of Microbiology, GBF-National Research Centre for Biotechnology, Braunschweig, Germany
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41
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Weithmann KU, Schlotte V, Jeske V, Seiffge D, Laber A, Haase B, Schleyerbach R. Effects of tiaprofenic acid on urinary pyridinium crosslinks in adjuvant arthritic rats: comparison with doxycycline. Inflamm Res 1997; 46:246-52. [PMID: 9266272 DOI: 10.1007/s000110050182] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [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: 02/05/2023] Open
Abstract
OBJECTIVE AND DESIGN To study the effects of tiaprofenic acid and doxycycline on urinary pyridinium crosslinks and paw swelling in adjuvant arthritic rats, and to gain additional information on the drugs' inhibitory potential vs. in vitro targets, such as enzyme activity of matrix metalloproteinases and cytokine generation. MATERIAL 124 male Wistar Lewis rats; for the in vitro studies human matrix metalloproteinases and human mononuclear cells were used. TREATMENT Arthritis was induced by injection of complete Freund adjuvant. Drugs (2, 15, 50 mg tiaprofenic acid/kg; 5, 15, 30 mg doxycycline/kg) were administered daily p.o. until day 21. In the in vitro studies 10-1000 mumoles/l of these drugs were used. METHODS Urinary levels of pyridinoline and deoxypyridinoline, determined by HPLC/fluorescence, and paw volumes were the measurements in the rat study. In the in vitro studies enzyme activities were assessed using fluorogenic peptide substrates; cytokines were determined by ELISA. RESULTS On day 21 of disease crosslink excretion was about twofold higher compared to the healthy controls. After administering daily 15 or 30 mg/kg tiaprofenic acid p.o. this increase was almost completely prevented whereas the paw volumes were suppressed by about 50%. Up to 50 mg/kg doxycycline did not display significant suppressive effects on crosslinks and paw volumes. In vitro 50-100 mumol/l of both drugs inhibited the activities of selected metallo-proteinases, but only doxycycline suppressed the generation of IL-1 beta/TNF alpha in human mononuclear cells, whereas tiaprofenic acid was virtually inactive in that model. CONCLUSIONS In arthritic rats tiaprofenic acid has not only the capability to suppress paw inflammation, but also to prevent with high potency the excretion of pyridinium crosslinks. Doxycycline without inherent antiinflammatory activity does not exhibit such preserving effects on collagen degradation in this model. Thus the mode of action of cartilage protecting drugs within the complex pathogenesis of arthritis will need further elucidation.
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MESH Headings
- Animals
- Anti-Bacterial Agents/administration & dosage
- Anti-Bacterial Agents/pharmacology
- Anti-Inflammatory Agents, Non-Steroidal/administration & dosage
- Anti-Inflammatory Agents, Non-Steroidal/pharmacology
- Arthritis, Experimental/drug therapy
- Arthritis, Experimental/pathology
- Arthritis, Experimental/urine
- Chromatography, High Pressure Liquid
- Cross-Linking Reagents
- Cytokines/metabolism
- Disease Models, Animal
- Doxycycline/administration & dosage
- Doxycycline/pharmacology
- Enzyme-Linked Immunosorbent Assay
- Freund's Adjuvant
- Humans
- Leukocytes, Mononuclear/drug effects
- Leukocytes, Mononuclear/metabolism
- Male
- Metalloendopeptidases/antagonists & inhibitors
- Propionates/administration & dosage
- Propionates/pharmacology
- Pyridinium Compounds/urine
- Rats
- Rats, Wistar
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42
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van Dalen J, Blok GA, Kranenburg J, Haase B. European Donor Hospital Education Program. Transplant Proc 1996; 28:398-9. [PMID: 8644288] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
MESH Headings
- Education, Continuing
- Education, Medical, Continuing
- Education, Nursing, Continuing
- Europe
- Health Knowledge, Attitudes, Practice
- Humans
- Medical Staff, Hospital/education
- Nursing Staff, Hospital/education
- Personnel, Hospital/education
- Tissue Donors
- Tissue and Organ Procurement/organization & administration
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Affiliation(s)
- J van Dalen
- University of Limburg, Maastricht, The Netherlands
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Böldicke T, Haase B, Böcher M, Lindenmaier W. Human monoclonal antibodies to cytomegalovirus. Characterization and recombinant expression of a glycoprotein-B-specific antibody. Eur J Biochem 1995; 234:397-405. [PMID: 8536681 DOI: 10.1111/j.1432-1033.1995.397_b.x] [Citation(s) in RCA: 2] [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] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Human monoclonal antibodies (mAb) to human cytomegalovirus (HCMV) were established from spleen cells of a HCMV-positive donor. The antibodies (gamma 3, lambda) secreted from a stable heterohybridoma cell line were further characterized by immunoprecipitation and immune-fluorescence microscopy using HCMV infected cells and recombinant cell lines expressing HCMV glycoprotein B. The antibody reacted with the entire glycoprotein B or the extracellular domain expressed as glycoprotein-B--beta-galactosidase fusion protein in the native state, but the antibody was not neutralizing HCMV. Denatured and reduced forms of glycoprotein B were not recognized by this antibody, however, native glycoprotein B on the surface of infected cells was detected efficiently. The genes encoding the Fab part of the antibody were cloned and expressed in Escherichia coli. Recombinant Fab fragments specifically binding the extracellular domain of glycoprotein B could easily be isolated from the periplasmic space. Recombinant antibodies provide the opportunity to modify effector functions and to add tags to diagnostic antibodies for more efficient detection of CMV-infected cells.
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Affiliation(s)
- T Böldicke
- Gesellschaft für Biotechnologische Forschung mbH, Department of Applied Genetics, Braunschweig, Germany
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Tesar M, Beckmann C, Röttgen P, Haase B, Faude U, Timmis KN. Monoclonal antibody against pIII of filamentous phage: an immunological tool to study pIII fusion protein expression in phage display systems. Immunotechnology 1995; 1:53-64. [PMID: 9373333 DOI: 10.1016/1380-2933(95)00005-4] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
UNLABELLED A monoclonal antibody directed against the gene 3 product (pIII) of filamentous phage M13 was produced to study pIII-fusion protein expression in E. coli and its incorporation in the phage capsid. The protein was gel-purified from E. coli expression cultures harboring the genetic information of pIII under the control of an inducible lac promoter. To study pIII-fusion protein expression, phage display systems were applied in which either the whole pIII or the C-terminal half was used (McCafferty et al. (1990) Nature (London) 348, 552-554; Szardenings and Collins (1990) Gene 94, 1-7; Barbas and Lerner (1991) In: METHODS Companion to METHODS in Enzymology, Combinatorial Immunoglobulin Libraries on the Surface of Phage (Phabs): Rapid Selection of Antigen-Specific Fabs, Vol. 2, Academic Press, Orlando, pp. 119-124). In all cases, the monoclonal antibody was able to detect the native and the recombinant protein in E. coli and on the phage tip using non-denaturing (ELISA) and denaturing (SDS-PAGE, immunoblot analysis) conditions. All selected pIII-specific monoclonal antibodies were found to be directed against epitopes within amino acids 198 to 406 of pIII, which is necessary for capsid incorporation and therefore included in all pIII-mediated phage display designs.
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Affiliation(s)
- M Tesar
- Department of Microbiology, GBF-National Research Centre for Biotechnology, Braunschweig, Germany
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Haase B. Clinical interpretation of "occupationally embedded exercise versus rote exercise: a choice between occupational forms by elderly nursing home residents". Am J Occup Ther 1995; 49:403-4. [PMID: 7598154 DOI: 10.5014/ajot.49.5.403] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Affiliation(s)
- B Haase
- St. Francis Health Care Centre, Green Springs, Ohio, USA
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46
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Harrington BA, Haase B. Latitudinal Differences in Sex Ratios among Nonbreeding Western Sandpipers in Puerto Rico and Ecuador. SOUTHWEST NAT 1994. [DOI: 10.2307/3672247] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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47
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Abstract
Six diastereoisomeric cyclic hexapeptides of the partial sequence 39-44 of human thymopoietin III in which each residue was replaced with the D-amino acid were synthesized. In contrast to expectations, the yields from cyclization were not influenced by the location of the D-residue.
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Affiliation(s)
- H Kessler
- Technical University of Munich, Institute of Organic Chemistry, Garching, Federal Republic of Germany
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Abstract
Goblet cell hyperplasia and metaplasia may be important in the pathogenesis of many respiratory diseases. To study the intracellular mechanisms of mucin synthesis, a purified goblet cell preparation is necessary. We have compared different methods of cell dissociation using cat trachea, a source rich in goblet cells. The most successful method used EDTA to loosen the basement membrane and 1% pronase to dissociate the epithelial cells. Goblet cells recovered from a linear Percoll gradient showed preservation of their ultrastructural detail, trypan blue exclusion, oxygen consumption, and synthesis of a high molecular weight compound resistant to hyaluronidase degradation, consistent with mucous glycoprotein. This method allows the isolation of adequate numbers of purified goblet cells for further study of goblet cell synthetic processes.
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Affiliation(s)
- J M Sherman
- Department of Pediatrics, University of South Florida College of Medicine, Tampa 33612
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49
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Gundermann KD, Lieske D, Haase B, Hartmann-Azanza Baca B. Synthesis and chemiluminescence of copolymers of 5-amino-8-vinyl-phthalazine-1,4(2H,3H)-dione with methyl methacrylate or styrene, and of alpha, omega-bis[5-amino-phthalazine-1,4(2H,3H)-dion-]8-yl alkanes [= alpha, omega-bis(6-luminyl) alkanes]: investigations on an intramolecular 'distance effect'. J Biolumin Chemilumin 1987; 1:201-13. [PMID: 3503528 DOI: 10.1002/bio.1170010402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Oligomers of 5-amino-8-vinyl-phthalazine-1,4(2H,3H)-dione exhibit about 0.05% of the chemiluminescence quantum yield of the corresponding 'monomer unit', i.e. 5-amino-8-ethyl-phthalazine-1,4(2H,3H)-dione which has a similar quantum yield to luminol. The quantum yields of copolymers of 5-amino-8-vinyl-phthalazine-1,4(2H,3H)-dione (1a) with methyl methacrylate or with styrene increase up to 1000-fold, relative to the quantum yield of oligomers of (1a). Thus the monomer units of methyl methacrylate or styrene appear to act as 'spacers' between the lumigenic groups. alpha, omega-Bis[(5-amino-phthalazine-1,4(2H,3H)-dion-)8-yl] alkanes show an analogue 'distance' effect: the chemiluminescence quantum yield increases with increasing alkane chain length. As the fluorescence of the corresponding amino phthalates (which are intermediates in the synthesis of the phthalazine diones) is only slightly influenced by the distance between the lumigenic groups it is suggested that a mainly chemical 'distance effect' is working here: the smaller the intramolecular distance between the hydrazide groups the more inhibition exists in respect of the oxidative reaction producing the luminol-type chemiluminescence.
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Affiliation(s)
- K D Gundermann
- Institut für Organische Chemie der Technischen Universität Clausthal, Clausthal-Zellerfeld, FRG
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50
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