A Quantitative Study of the Pulmonary Vascular Bed and Pulmonary Weight: Body Weight Ratio in Chickens Exposed to Relative Normoxia and Chronic Hypobaric Hypoxia
The number of pulmonary blood vessels of different diameter range and the lung weight: body weight ratio were calculated in broiler chickens, as potential markers of adaptation to hypobaric hypoxia. Cobb500 broilers were housed at 460 and 2638 meters above sea level. Four week-old birds were assig...
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| Format: | Article |
| Language: | English |
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Japan Poultry Science Association
2011-10-01
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| Series: | The Journal of Poultry Science |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jpsa/48/4/48_011030/_pdf/-char/en |
| _version_ | 1797816204992184320 |
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| author | Rafael A. Areiza Rojas Piedad C. Rivas López Aureliano Hernández Vásquez |
| author_facet | Rafael A. Areiza Rojas Piedad C. Rivas López Aureliano Hernández Vásquez |
| author_sort | Rafael A. Areiza Rojas |
| collection | DOAJ |
| description | The number of pulmonary blood vessels of different diameter range and the lung weight: body weight ratio were calculated in broiler chickens, as potential markers of adaptation to hypobaric hypoxia. Cobb500 broilers were housed at 460 and 2638 meters above sea level. Four week-old birds were assigned to the following groups: 1) non-pulmonary-hypertensive chickens reared under normoxia and 2) 3), non-pulmonary-hypertensive chickens and pulmonary-hypertensive chickens maintained under natural conditions of hypobaric hypoxia, respectively. The number of blood vessels per area was calculated in representative lung tissue samples of chickens from each group. The blood vessel diameter ranges included for quantitative assessments were ≥50-100, >100-200 μm, using 100 magnifications, and >200-300 and >300-500 μm, under 40 magnifications. Although for the diameter ranges >100-200, >200-300 and >300-500 μm no statistically significant differences were found in the number of vessels/area (P>0.05) among different groups, pulmonary-hypertensive chickens reared under hypoxia showed numerically higher values when compared with non-pulmonary-hypertensive chickens reared under hypoxia or normoxia. For the ≥50-100 μm range, pulmonary-hypertensive and non-pulmonary-hypertensive chickens reared under hypoxia had a significantly lower number of blood vessels (P<0.05) than that registered for non-pulmonary-hypertensive chickens grown under normoxia. The latter finding could have, a negative impact on vascular resistance to blood flow for broilers developed under hypoxia and negatively influence pulmonary gas exchange. The lung weight: body weight ratio was no significantly different in PHCH as compared to NHCH reared under hypoxic conditions (P>0.05). It is possible that the time under hypoxia was not long enough to permit compensatory lung growth which could allow for neo-formation of respiratory or blood capillary in the lungs. |
| first_indexed | 2024-03-13T08:34:15Z |
| format | Article |
| id | doaj.art-b61e1b3216714a1093a458f9db2bc97c |
| institution | Directory Open Access Journal |
| issn | 1346-7395 1349-0486 |
| language | English |
| last_indexed | 2024-03-13T08:34:15Z |
| publishDate | 2011-10-01 |
| publisher | Japan Poultry Science Association |
| record_format | Article |
| series | The Journal of Poultry Science |
| spelling | doaj.art-b61e1b3216714a1093a458f9db2bc97c2023-05-31T01:08:19ZengJapan Poultry Science AssociationThe Journal of Poultry Science1346-73951349-04862011-10-0148426727410.2141/jpsa.011030jpsaA Quantitative Study of the Pulmonary Vascular Bed and Pulmonary Weight: Body Weight Ratio in Chickens Exposed to Relative Normoxia and Chronic Hypobaric HypoxiaRafael A. Areiza Rojas0Piedad C. Rivas López1Aureliano Hernández Vásquez2Faculty of Veterinary Medicine and Zootecnia, The National University of Colombia, ColombiaFaculty of Veterinary Medicine and Zootecnia, The National University of Colombia, ColombiaFaculty of Veterinary Medicine and Zootecnia, The National University of Colombia, ColombiaThe number of pulmonary blood vessels of different diameter range and the lung weight: body weight ratio were calculated in broiler chickens, as potential markers of adaptation to hypobaric hypoxia. Cobb500 broilers were housed at 460 and 2638 meters above sea level. Four week-old birds were assigned to the following groups: 1) non-pulmonary-hypertensive chickens reared under normoxia and 2) 3), non-pulmonary-hypertensive chickens and pulmonary-hypertensive chickens maintained under natural conditions of hypobaric hypoxia, respectively. The number of blood vessels per area was calculated in representative lung tissue samples of chickens from each group. The blood vessel diameter ranges included for quantitative assessments were ≥50-100, >100-200 μm, using 100 magnifications, and >200-300 and >300-500 μm, under 40 magnifications. Although for the diameter ranges >100-200, >200-300 and >300-500 μm no statistically significant differences were found in the number of vessels/area (P>0.05) among different groups, pulmonary-hypertensive chickens reared under hypoxia showed numerically higher values when compared with non-pulmonary-hypertensive chickens reared under hypoxia or normoxia. For the ≥50-100 μm range, pulmonary-hypertensive and non-pulmonary-hypertensive chickens reared under hypoxia had a significantly lower number of blood vessels (P<0.05) than that registered for non-pulmonary-hypertensive chickens grown under normoxia. The latter finding could have, a negative impact on vascular resistance to blood flow for broilers developed under hypoxia and negatively influence pulmonary gas exchange. The lung weight: body weight ratio was no significantly different in PHCH as compared to NHCH reared under hypoxic conditions (P>0.05). It is possible that the time under hypoxia was not long enough to permit compensatory lung growth which could allow for neo-formation of respiratory or blood capillary in the lungs.https://www.jstage.jst.go.jp/article/jpsa/48/4/48_011030/_pdf/-char/enbroilerhypobaric hypoxiapulmonary hypertensionpulmonary vascular developmentpulmonary weight |
| spellingShingle | Rafael A. Areiza Rojas Piedad C. Rivas López Aureliano Hernández Vásquez A Quantitative Study of the Pulmonary Vascular Bed and Pulmonary Weight: Body Weight Ratio in Chickens Exposed to Relative Normoxia and Chronic Hypobaric Hypoxia The Journal of Poultry Science broiler hypobaric hypoxia pulmonary hypertension pulmonary vascular development pulmonary weight |
| title | A Quantitative Study of the Pulmonary Vascular Bed and Pulmonary Weight: Body Weight Ratio in Chickens Exposed to Relative Normoxia and Chronic Hypobaric Hypoxia |
| title_full | A Quantitative Study of the Pulmonary Vascular Bed and Pulmonary Weight: Body Weight Ratio in Chickens Exposed to Relative Normoxia and Chronic Hypobaric Hypoxia |
| title_fullStr | A Quantitative Study of the Pulmonary Vascular Bed and Pulmonary Weight: Body Weight Ratio in Chickens Exposed to Relative Normoxia and Chronic Hypobaric Hypoxia |
| title_full_unstemmed | A Quantitative Study of the Pulmonary Vascular Bed and Pulmonary Weight: Body Weight Ratio in Chickens Exposed to Relative Normoxia and Chronic Hypobaric Hypoxia |
| title_short | A Quantitative Study of the Pulmonary Vascular Bed and Pulmonary Weight: Body Weight Ratio in Chickens Exposed to Relative Normoxia and Chronic Hypobaric Hypoxia |
| title_sort | quantitative study of the pulmonary vascular bed and pulmonary weight body weight ratio in chickens exposed to relative normoxia and chronic hypobaric hypoxia |
| topic | broiler hypobaric hypoxia pulmonary hypertension pulmonary vascular development pulmonary weight |
| url | https://www.jstage.jst.go.jp/article/jpsa/48/4/48_011030/_pdf/-char/en |
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