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1.
Manag Int Rev ; 63(2): 285-312, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36714042

RESUMO

Building on the resource-based view, we propose conceptualizing a foreign multinational's country of origin as a resource, an asset tied semi-permanently to the firm, and analyze how this resource affects its host country investments. We argue that the country of origin provides an advantage or disadvantage in the host country depending on its positive or negative view among the host-country government and consumers. This results in four alternative configurations of host country investment dynamics based on the alignment of their views. First, when a multinational's country of origin generates a government-based advantage and a consumer-based disadvantage, the multinational is more likely to make larger initial investments to benefit from incentives and larger subsequent localization investments to disassociate itself from the country of origin. Second, when the country of origin creates a government-based disadvantage and a consumer-based advantage, the foreign firm is more likely to make smaller initial and subsequent investments to maintain its association with the country of origin. Third, when the country of origin leads to government-based and consumer-based advantages, the foreign multinational is more likely to make a large initial investment to benefit from government incentives and smaller subsequent investments to maintain its association with the country of origin. Finally, when the country of origin leads to government-based and consumer-based disadvantages, the foreign multinational is more likely to make smaller initial investments to minimize risk and larger subsequent investments to localize.

2.
Pol J Vet Sci ; 24(3): 323-333, 2021 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-34730310

RESUMO

Diarrhea caused by parasitic agents is common in neonatal calves and leads to significant economic losses in cattle farms worldwide. Cryptosporidium spp. is one of the most frequently detected parasitic agents causing diarrhea in neonatal calves. The aim of this study was to investigate the presence of Cryptosporidium spp. on a dairy farm which a has major diarrhea problem. Samples were collected from calves, cows, drinking bowls, and two different artesian water sources, as well as from the environment. All fecal samples were investigated using Kinyoun acid-fast stained slides and real-time PCR targeting the Cryptosporidium spp. COWP gene. In addition, species identification was performed by nested PCR targeting the Cryptosporidium spp. COWP gene and sequencing. Cryptosporidium spp. was detected in 11 calves (30.55%; 11/36) by real-time PCR and the cows were negative. Among real-time PCR positive samples, only five were also found positive by microscopy. Moreover, Cryptosporidium spp. was found in one of the two artesian water sources and five environmental samples by real-time PCR. Among these positive samples, eight were sequenced. According to the RFLP pattern, BLAST and, phylogenetic analyses, all sequenced samples were Cryptosporidium parvum. These findings show the importance of C. parvum as a cause of calf diarrhea on dairy farms.


Assuntos
Doenças dos Bovinos/parasitologia , Criptosporidiose/parasitologia , Cryptosporidium parvum/isolamento & purificação , Água/parasitologia , Animais , Bovinos , Doenças dos Bovinos/epidemiologia , Criptosporidiose/epidemiologia , Indústria de Laticínios , Diarreia/parasitologia , Diarreia/veterinária , Surtos de Doenças/veterinária , Fezes/parasitologia , Feminino
3.
Pol J Vet Sci ; 24(2): 217-223, 2021 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-34250772

RESUMO

Blastocystis sp. is one of the most frequently detected intestinal parasites in humans and can inhabit a wide range of animals. Close contact with animals is one of the transmission factors of Blastocystis sp. infection in humans. In this study, we aimed to investigate the molecular prevalence and subtypes of Blastocystis sp. in stray cats living in Izmir, Turkey. The PCR target- ing the barcode region in the SSU rRNA gene was performed with DNA samples isolated from feces (n:465) to investigate the presence of Blastocystis sp. PCR positive samples were sequen- ced for subtyping analysis. Among the samples analyzed, Blastocystis sp. DNA was detected in 17 (3.65%) of them and sequence data were obtained from only seven isolates. Phylogenetic analysis showed that seven Blastocystis sp. isolates clustered with the reference Blastocystis ST4 isolates. Similarity rates were between 83.22% and 99.25%. In addition, Blastocystis database results confirmed that all of these were "allele 42" corresponding to ST4. As a result, the present study shows for the first time the presence of "ST4 allele 42", the prevalent subtype in humans, in stray cats in Izmir, Turkey. This finding supports the notion that stray cats can be a source of Blastocystis sp. infection in humans.


Assuntos
Infecções por Blastocystis/veterinária , Blastocystis/classificação , Doenças do Gato/parasitologia , Animais , Blastocystis/genética , Infecções por Blastocystis/epidemiologia , Infecções por Blastocystis/parasitologia , Gatos , Filogenia , Turquia/epidemiologia
4.
J Anim Breed Genet ; 131(6): 487-95, 2014 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-24942987

RESUMO

Anatolia has been an important region for civilizations and agricultural revolution as a major domestication centre for livestock species. Goats (Capra hircus) were among the earliest domesticated animals in this region. In this study, genetic diversity of Anatolian goat breeds was characterized by comparison of mitochondrial DNA hypervariable region 1. A total of 295 individuals, including 99 Anatolian Black goats, 96 Angora goats and 100 Kilis goats, were used. Haplogroup A was found to be the dominant haplogroup in all three breeds. The highest haplogroup diversity, including haplogroups A, B2, C and G, was observed in the Anatolian Black breed. Haplogroup D was only observed in Kilis and Angora goats. Haplogroup G was found in Angora and Anatolian Black breeds. The Anatolian goat breeds had high genetic diversity values and a weak phylogeographical structure. The nucleotide diversity values were found to be higher than those in previously studied goat breeds. The fact that Anatolia is a domestication centre and its geographical position as a junction of trade routes may have caused the higher genetic diversity of Anatolian goat breeds.


Assuntos
DNA Mitocondrial/química , Variação Genética , Cabras/genética , Animais , Sequência de Bases , Haplótipos , Dados de Sequência Molecular , Filogeografia , Análise de Sequência de DNA
5.
Genetika ; 46(4): 497-501, 2010 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-20536020

RESUMO

The aim of this study was to determine the allele and genotype frequencies of the Insulin like growth factor 1 gene (IGF-1) and Insulin like growth factor 1 receptor gene (IGF-1R) polymorphisms in East Anatolian (EAR) and South Anatolian Red cattle (SAR). Polymorphisms in both genes are claimed to affect economic parameters like body weight and subcutaneous back fat. For the study, blood samples were collected from 50 SAR and 50 EAR cattle. In both breeds, high frequencies of allele B of IGF-1, which was supposed to have positive effect on carcass traits and allele A of IGF-1R, related to milk traits, were observed. Therefore, no relationship of the polymorphisms studied with economic traits was observed, as both breeds have respectively low carcass and milk parameters. However, distribution of allele frequencies of IGF-1 and IGF-1R in SAR and EAR cattle was similar with Zebu cattle that support Bos indicus introgression to Anatolian breeds.


Assuntos
Bovinos/genética , Fator de Crescimento Insulin-Like I/genética , Polimorfismo Genético , Característica Quantitativa Herdável , Receptor IGF Tipo 1/genética , Alelos , Animais , Peso Corporal/genética , Bovinos/metabolismo , Feminino , Frequência do Gene , Fator de Crescimento Insulin-Like I/metabolismo , Masculino , Leite/metabolismo , Receptor IGF Tipo 1/metabolismo , Gordura Subcutânea/metabolismo , Turquia
6.
Reproduction ; 139(5): 857-70, 2010 May.
Artigo em Inglês | MEDLINE | ID: mdl-20176746

RESUMO

This study was conducted to investigate the effect of suppressing transcription factor gene MSX1 on the development of in vitro produced bovine oocytes and embryos, and identify its potential target genes regulated by this gene. Injection of long double-stranded RNA (LdsRNA) and small interfering RNA (siRNA) at germinal vesicle stage oocyte reduced MSX1 mRNA expression by 73 and 37% respectively at metaphase II stage compared with non-injected controls. Similarly, injection of the same anti-sense oligomers at zygote stage reduced MSX1 mRNA expression by 52 and 33% at 8-cell stage compared with non-injected controls. Protein expression was also reduced in LdsRNA- and siRNA-injected groups compared with non-injected controls at both stages. Blastocysts rates were 33, 28, 20 and 18% in non-injected control, scrambled RNA (scRNA), LdsRNA- and siRNA-injected groups respectively. Cleavage rates were also significantly reduced in Smartpool siRNA (SpsiRNA)-injected group (53.76%) compared with scRNA-injected group (57.76%) and non-injected control group (61%). Large-scale gene expression analysis showed that 135 genes were differentially regulated in SpsiRNA-injected group compared with non-injected controls, of which 54 and 81 were down- and up-regulated respectively due to suppression of MSX1. Additionally, sequence homology mapping and gene enrichment analysis with known human pathway information identified several functional modules that were affected due to suppression of MSX1. In conclusion, suppression of MSX1 affects oocyte maturation, embryo cleavage rate and the expression of several genes, suggesting its potential role in the development of bovine preimplantation embryos.


Assuntos
Blastocisto/fisiologia , Desenvolvimento Embrionário/genética , Regulação da Expressão Gênica no Desenvolvimento , Fator de Transcrição MSX1/genética , Supressão Genética , Animais , Bovinos , Feminino , Fertilização in vitro , Perfilação da Expressão Gênica , Proteínas de Homeodomínio/genética , Proteínas de Homeodomínio/metabolismo , Fator de Transcrição MSX1/química , Fator de Transcrição MSX1/fisiologia , Masculino , Metáfase , Microinjeções , Análise de Sequência com Séries de Oligonucleotídeos , Oócitos/citologia , Oócitos/fisiologia , RNA de Cadeia Dupla , RNA Mensageiro/isolamento & purificação , RNA Mensageiro/metabolismo , RNA Interferente Pequeno , Homologia de Sequência do Ácido Nucleico , Fatores de Tempo , Zigoto/fisiologia
7.
J Anim Breed Genet ; 126(6): 463-7, 2009 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-19912420

RESUMO

Bovine spongiform encephalopathy (BSE) is a fatal disease caused by miss folded prion protein. Studies in the cattle, comparing genetic data from BSE diseased and healthy animals have shown that indel polymorphisms in the promoter and intron 1 of PRNP gene were associated with disease susceptibility. Several studies were conducted to find out allele and genotypic frequencies of indel polymorphisms in promoter and intron 1 of the cattle PRNP gene. Unlike domestic cattle and bison, no indel polymorphisms of the PRNP promoter and intron 1 were examined in any population of the water buffalo (Bubalus bubalis). Aim of this study was to analyse frequencies of allele, genotype, and haplotype of the indel polymorphisms (23 bp indel in promoter and 12 bp indel in intron 1) in prion protein coding gene (PRNP) of water buffalo. Therefore a PCR based procedure, previously used in cattle to detect indel polymorphisms of PRNP promoter and intron 1 locus, was applied to 106 Anatolian water buffalo DNAs. Our results have revealed high frequency of in variants and in23/in12 haplotype for PRNP promoter and intron 1 indel polymorphisms in water buffalo. The results of the study have demonstrated that frequencies of allele, genotype, and haplotype of the indel polymorphisms in PRNP gene of the Anatolian water buffalo are significantly different those from cattle and bison PRNP indel polymorphisms.


Assuntos
Búfalos/genética , Mutação INDEL , Príons/genética , Regiões Promotoras Genéticas/genética , Animais , Feminino , Íntrons , Masculino , Polimorfismo Genético , Turquia
8.
Haemophilia ; 12(4): 398-400, 2006 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-16834740

RESUMO

The most common cause for severe cases of hemophilia A is the homologous recombination involving intron 22 and related sequences outside the F8 gene. F8 coding regions of the gene including the exon/intron junctions were sequenced in 10 Turkish hemophilia A patients all of whom have been typed negative for intron 22 inversion and who did not have a detectable change by DGGE analysis. Pathological changes including two novel deletions (c. 205del CT and c. 3699del ACAT), one novel missense mutation (9546A) and two recurrent missense mutations were observed in five patients. The c. 2110C > T is another novel pathological change affecting exonic splicing enhancer site in two patients. One of the remaining three patients had a recurrent vWD type 2N mutation in the F8 binding site of the vWF (C788R). The S1269S polymorphism (c. 3864A > C) detected phenotype. Conclusively, sequencing of the promoter and the coding regions of 10 hemophilia A patients contributes four novel pathological mutations to the F8 mutations list and reveals a rediagnosis of hemophilia A but is still not sufficient to confirm hemophilia A phenotype in two patients.


Assuntos
Fator VIII/genética , Hemofilia A/genética , Mutação , Doenças de von Willebrand/diagnóstico , Análise Mutacional de DNA , Diagnóstico Diferencial , Hemofilia A/diagnóstico , Humanos , Íntrons/genética , Masculino , Polimorfismo Genético
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