Impact of shock and fluid resuscitation on the morphology and apoptosis of bone marrow: an experimental study
| Autor: | S. Sinosaki, Thereza Christina Bortolheiro, Daniela Hardt, Carlos Chiattone, Luiz Francisco Poli de Figueiredo, Milene N Rocha, Samir Rasslan, Carlos Alberto Longui, Mauricio Rocha e Silva, Margareth Maçae Yada Langui, José Gustavo Parreira |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Male
Resuscitation Ringer's Lactate Time Factors Blood volume Apoptosis Blood Pressure Bone Marrow Cells Granulocyte Shock Hemorrhagic Critical Care and Intensive Care Medicine Monocytes Leukocyte Count DNA Nucleotidylexotransferase medicine Immune Tolerance In Situ Nick-End Labeling Animals Lymphocytes Rats Wistar Bone Marrow Diseases Analysis of Variance medicine.diagnostic_test business.industry Bone marrow failure Bone Marrow Examination medicine.disease Hypertonic saline Rats Bone marrow examination Disease Models Animal medicine.anatomical_structure Blood pressure Anesthesia Erythrocyte Count Fluid Therapy Surgery Bone marrow Isotonic Solutions business Granulocytes |
| Zdroj: | The Journal of trauma. 56(5) |
| ISSN: | 0022-5282 |
| Popis: | Background: We hypothesized that bone marrow failure after hemorrhagic shock might be secondary to impaired apoptosis regulation. Our objective was to assess the morphologic alterations and the rate of apoptosis in bone marrow after hemorrhagic shock and resuscitation. Methods: Under pentobarbital anesthesia, Wistar rats (n = 70) underwent femoral vessel cannulation. The hemorrhagic shock model involved a controlled retrieval of blood, maintaining mean blood pressure at 40 ± 5 mm Hg during 50 minutes. During the resuscitation period, lactated Ringer's (twice the blood volume retrieved, group LR) or NaCI 7.5% (4 mL/kg, group HS) was infused, followed by the previously retrieved blood. Bone marrow was collected through left femoral puncture. Morphology was assessed by Leishmann-stained smears, and apoptosis was assessed through terminal deoxynucleotide transferase-mediated dUTP nick-end labeling assay. Analysis of variance and Tukey's test were applied for statistical treatment, considering p < 0.05 as significant. Results: LR animals presented a statistically significant decrease in the lymphocytic series (LR, 24.2 ± 4.2%; Sham, 55.1 ± 6.6%), together with an increase in the percentage of granulocyte (LR, 51.4% ± 2.3%; Sham, 31.5 ± 2.9%) and monocyte precursors (LR, 7.3 ± 1.3%; Sham, 3.3 ± 1,1%), detected 72 hours after shock (p < 0.05). Both LR and HS groups presented a significant increase in apoptosis, when compared with the sham group (LR, 13.1 ± 0.5%; HS, 12.2 ± 0.7%; Sham, 6.8 ± 0.4%). The alterations detected in the bone marrow morphology of LR group were not observed in HS animals. Conclusion: There was an increase in bone marrow apoptosis after hemorrhagic shock. The type of resuscitation scheme used did influence bone marrow morphology. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|