Avian reproductive anatomy, physiology and endocrinology

Pollock, Christal G.; Orosz, Susan E.

doi:10.1016/s1094-9194(02)00010-5

Cited by 44 publications

(28 citation statements)

References 41 publications

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“…The volume ratios between ST and interstitial connective tissue in sexually mature Muscovy drakes during the breeding period correlated to findings in Icteridae birds (Lupold et al, 2009). The enlarged ST volume was responsible for the seasonal hypertrophy of testes in birds (Pollock, 2002).…”

Section: Discussionsupporting

confidence: 70%

Testicular development in the muscovy duck (cairina moschata)

Gerzilov¹,

Bochukov²,

Penchev³

et al. 2016

BJVM

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The testes of three birds were examined at each age period. The testicular morphometry at the respective age included the following parameters-weight, length and width, diameter of seminiferous tubules (ST), ratio between ST volume and interstitial connective tissue volume. Immediately after hatching, there were two cell types in seminiferous tubular wall-Sertoli cells (Еpitheliocytus sustentans) and spermatogonia. At 2 months of age, spermatogonia formed one row in ST with lumen and the spermatogenesis has started. At 5 months of age, all generations of germ cells were present in ST. After that age, the histological picture is the typical one for the testis of a sexually mature bird. Morphometric findings were as followed: after the 2 nd month of age, the increase in testes weight and ST diameter became more pronounced at each subsequent age period. During the breeding period (at 8-12 months of age and at 2 years of age), the weight and size of testes were the greatest. From hatch to 1 month of age, the interstitial tissue (IT) prevailed over ST, whereas at age periods that followed, the opposite relationship was observed. During the non-breeding period (18 months of age) the testicular parenchyma regressed resulting in lower testes weight, lower ST diameter and volume and presence of spermatogonia only in ST lumen. The weight and size of testes was identical to that of birds at 4 months of age.

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Section: Discussionsupporting

confidence: 70%

Testicular development in the muscovy duck (cairina moschata)

Gerzilov¹,

Bochukov²,

Penchev³

et al. 2016

BJVM

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“…따라서 조류는 포유류와 유사한 생물학 적 특성과 척추동물의 진화에 중요한 동물로 인식되고 있으 며, 이러한 특성은 인간을 비롯한 가축의 특정 표현형 형질 에 대한 모델동물로써 활용이 가능하다는 것을 알 수 있다. 닭은 산업화된 주요한 가축 중에서 비교적 작은 몸집을 가 지고 있어 좁은 공간에서 많은 개체를 사육할 수 있는 장점 이 있고, 성장속도가 돼지와 비교해서는 4배 이상, 소와 비 교해서는 10배 이상 빠른 것으로 보고되어 있으며, 사료효율 측면에서도 돼지와 비교해서는 대략 2배, 소와는 10배 이상 의 효율을 나타내어 사육에 소요되는 비용과 시간 측면에서 도 다른 가축에 비해서 효용이 높음을 알 수 있다 (Wilkinson, 2011 (Giles et al, 2010;Pollock and Orosz, 2002;Song and Han, 2011 (Wang et al, 2013). 닭에서는 생선사료를 먹은 산란계가 낳 은 계란의 노른자에서 생선비린내가 발생하는 현상을 모델 로 삼고 있다 (Vondell, 1948).…”

Section: 본 론unclassified

Application of Animal Biomodel using Poultry: A Review

Seo¹,

Lee²

2016

Korean Journal of Poultry Science

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Chicken not only serves as a high-protein source to humans, but it is also used as a suitable biomodel for increasing livestock productivity and studying human diseases. Chickens have numerous advantages as model organisms mainly because of they are relatively convenient to manage due to their small body size and short generational interval. In addition, they have a small genome size and numerous genes have biologically similar functions to those of human and livestock animals. In this review, we investigated the chicken biomodel for human disease research and the use of this model for increasing livestock productivity. This summary could provide useful and basic information for further development of strategies for enhancing livestock production and human disease studies.

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“…The female hen possesses a single functional ovary, which undergoes ovulation at a high rate during its lifespan (60). Despite anatomical differences, the laying hen is the only experimental model that develops spontaneous OC and, at the same time, offers the possibility of easy manipulation of external factors, such as nutrition or hormones and drug administration (61,62).…”

Section: The Domestic Hen: a Unique Model To Study Eocmentioning

confidence: 99%

Advantages of the avian model for human ovarian cancer

Bernardo

Þorsteinsdóttir

Mummery

2015

Molecular and Clinical Oncology

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Abstract. Ovarian cancer (OC) is the most lethal gynecological cancer. Early detection of OC is crucial for providing efficient treatment, whereas high mortality rates correlate with late detection of OC, when the tumor has already metastasized to other organs. The most prevalent type of OC is epithelial OC (EOC). Models that have been used to study EOC include the fruit fly, mouse and laying hen, in addition to human EOC cells in 3D culture in vitro. These models have helped in the elucidation of the genetic component of this disease and the development of drug therapies. However, the histological origin of EOC and early markers of the disease remain largely unknown. In this study, we aimed to review the relative value of each of the different models in EOC and their contributions to understanding this disease. It was concluded that the spontaneous occurrence of EOC in the adult hen, the prolific ovulation, the similarity of metastatic progression with that in humans and the advantages of using the chicken embryo for modelling the development of the reproductive system, renders the hen particularly suitable for studying the early development of EOC. Further investigation of this avian model may contribute to a better understanding of EOC, improve clinical insight and ultimately contribute to decreasing its mortality rates among humans.

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Avian reproductive anatomy, physiology and endocrinology

Cited by 44 publications

References 41 publications

Testicular development in the muscovy duck (cairina moschata)

Testicular development in the muscovy duck (cairina moschata)

Application of Animal Biomodel using Poultry: A Review

Advantages of the avian model for human ovarian cancer

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