Quantitative Echotexture Analysis for Prediction of Ovulation in Mares

Chan, Jacky Peng-Wen; Huang, Tsung-Hsiang; Chuang, Shih-Te; Cheng, Fei-Fei; Fung, Hang-Poung; Chen, Chao-Ling; Mao, Chi-Liang

doi:10.1016/j.jevs.2003.08.013

Cited by 5 publications

(5 citation statements)

References 16 publications

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“…The increase in prominence of the anechoic band in the control and hCG groups after the follicle reached $ 35 mm has been reported previously for non-hCG-treated mares (Gastal et al 1998, Chan et al 2003. The percentage of follicle circumference with an anechoic band did not change in either the control or hCG groups during the posttreatment period and during 36 and 24 h before ovulation (preovulatory period).…”

Section: Discussionsupporting

confidence: 79%

“…In addition to an increase in echogenicity of the granulosa, prominence of an anechoic band in the expected area of the theca layers increased daily and progressively in the period 3 to 1 days before ovulation (Gastal et al 1998). Based on similar end-points, days and interval (1 day) between scanning sessions as for the above study, it has been concluded that the slopes of the regression lines for these characteristics are related to impending ovulation (Chan et al 2003). In another study (Carnevale et al 2002), several mean pixel values increased in an approximately linear fashion during the 14 h before ovulation in human chorionic gonadotropin (hCG)-treated mares.…”

Section: Introductionsupporting

confidence: 59%

“…This characteristic is apparently similar to the anechoic band described in mares (Gastal et al 1998, Chan et al 2003. Computer-assisted image analysis and mathematical modelling of the dynamic changes in the combined layers of the wall from stroma to antrum are being investigated in women and cattle (Singh et al 2003), but results have not yet been directly compared with the anechoic band that was described in the earlier literature.…”

Section: Introductionmentioning

confidence: 78%

“…Scores were assigned without reference to the score from the previous examination. The prominence of the anechoic band was scored from grey and thin to black and thick as described previously (Gastal et al 1998, 1999, Chan et al 2003. The granulosa was identified on the basis of its position next to the antrum (Fig.…”

Section: End-pointsmentioning

confidence: 99%

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Relationships of changes in B-mode echotexture and colour-Doppler signals in the wall of the preovulatory follicle to changes in systemic oestradiol concentrations and the effects of human chorionic gonadotrophin in mares

Gastal¹,

Gastal²,

Ginther³

2006

Reproduction

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A duplex grey-scale and colour-Doppler ultrasound instrument was used to study the changes in the wall of the preovulatory follicle in mares. When the follicle reached $35 mm (hour 0), mares were randomized into control (n 5 16) and human chorionic gonadotropin (hCG)-treated (n 5 16) groups. The hCG treatment was given at hour 0. Scanning was done every 12 h until hour 36, every hour between hours 36 and 48, and every 12 h thereafter until ovulation. Blood was sampled every 12 h for oestradiol assay. During the period 0-24 h post-treatment, oestradiol concentrations decreased in the hCG group and increased in the controls (significant interaction). During the period 0-36 h post-treatment, thickness and echogenicity of the granulosa increased in the hCG group but not in the controls. During the period 36 to 12 h before ovulation, granulosa and colour-Doppler end-points increased in the control and hCG groups (hour effects), while oestradiol was decreasing in both groups. The prominence and percentage of follicle circumference with an anechoic band peripheral to the granulosa and colour-Doppler signals in the follicle wall, indicating arterial blood flow, decreased during the period 4 to 1 h before ovulation (hour effects). Results indicated that the ultrasonographic changes of the wall of the preovulatory follicle were not associated temporally with changes in oestradiol concentrations and prominence of an anechoic band, and colour-Doppler signals decreased during the few hours before ovulation. The hypothesis that the latter portion of the ovulatory LH surge has a negative effect on systemic oestradiol was supported by the immediate decrease in oestradiol concentrations when hCG was injected.

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Section: Discussionsupporting

confidence: 79%

Section: Introductionsupporting

confidence: 59%

Section: Introductionmentioning

confidence: 78%

Section: End-pointsmentioning

confidence: 99%

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Relationships of changes in B-mode echotexture and colour-Doppler signals in the wall of the preovulatory follicle to changes in systemic oestradiol concentrations and the effects of human chorionic gonadotrophin in mares

Gastal¹,

Gastal²,

Ginther³

2006

Reproduction

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“…The disease occurs as an acute or chronic septicemia characterized by fibrinous pericarditis, perihepatitis, airsacculitis, caseous salpingitis, and meningitis [28]. Currently, more than 21 serotypes of RA have been identified [29][30][31]. Once the disease has invaded duck and goose flocks, it can become endemic.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Synonymous Codon Usage Bias in the Riemerella Anatipestifer Major Facilitator Superfamily Mfs_1 Gene Encoded 492 Amino Acids Protein

Zhang

Cheng

Wang

et al. 2013

AMR

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Objective: The aim was to identify the codon usage bias between the newly identified Riemerella anatipestifer (RA) major facilitator superfamily mfs_1 gene (GenBank accession No.CP003388.1) and other reference bacteriums. Methods: A comparative analysis of the codon usage bias of the 18 bacteriums was performed by using the CodonW 1.4 program and CUSP (create a codon usage table) program of EMBOSS (The European Molecular Biology Open Software Suite). Results: The results showed obvious differences of the synonymous codon usage bias in the 18 bacteriums indicated by the Codon Adaptation Index (CAI), effective number of codons (ENc), and the value of G+C content at the 3rd codon position. The codon usage pattern of the major facilitator superfamily mfs_1 gene was phylogenetically conserved and similar to that of the major facilitator superfamily mfs_1 gene of the Elizabethkingia anophelis Ag1 Contig17, with a strong bias towards the codons with A and T at the 3rd codon position. A cluster analysis of codon usage pattern of the RA major facilitator superfamily mfs_1 gene with other reference bacteriums demonstrated that the codon usage bias of the major facilitator superfamily mfs_1 genes of the 18 bacteriums had a very close relation with their gene function. The ENc-plot revealed that the genetic heterogeneity in the RA major facilitator superfamily mfs_1 gene and the 18 reference bacteriums were constrained by G+C content, while gene length exerted relatively weaker influences. In addition, comparisons of the codon preferences in the major facilitator superfamily mfs_1 gene of RA with those of Escherichia coli, yeast and humans revealed that there were 36 codons showing distinct usage differences between the RA and E. coli, and 37 between the RA and humans, but only 28 between the RA and yeast. Therefore, the yeast system may be more suitable for the expression of the RA major facilitator superfamily mfs_1 gene. Conclusion: Together, these results may improve our understanding of the evolution, pathogenesis and functional studies of RA and possibly contribute significantly to the area of other bacteriums.

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Serrated granulosa and other discrete ultrasound indicators of impending ovulation in mares

Gastal¹,

Gastal²,

Ginther³

2006

Journal of Equine Veterinary Science

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Quantitative Echotexture Analysis for Prediction of Ovulation in Mares

Cited by 5 publications

References 16 publications

Relationships of changes in B-mode echotexture and colour-Doppler signals in the wall of the preovulatory follicle to changes in systemic oestradiol concentrations and the effects of human chorionic gonadotrophin in mares

Relationships of changes in B-mode echotexture and colour-Doppler signals in the wall of the preovulatory follicle to changes in systemic oestradiol concentrations and the effects of human chorionic gonadotrophin in mares

Characterization of Synonymous Codon Usage Bias in the Riemerella Anatipestifer Major Facilitator Superfamily Mfs_1 Gene Encoded 492 Amino Acids Protein

Serrated granulosa and other discrete ultrasound indicators of impending ovulation in mares

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