Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0020440 (hypercapnia)
 7,939 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

In experiments with rats, subjected to single and repeated simultaneous effect of hypercapnia, hypoxia and cooling, contents of pyridine nucleotides (NAD, NADP, NAD-H2 and NADP-H2) and macroergic substances were studied and also the activity of dehydrogenases of the pentose pathway was determined in brain and myocardium. In brain NADP was not practically determined and in heart its content was increased after the first and the second treatments. Content of NADP-H2 was distinctly decreased in both tissues after the single treatment. NAD was not altered in the tissues in all the periods studied. The amount of NAD-H2 was decreased in brain after the single treatment and it was increased in myocardium after the repeated one. In the activity of dehydrogenases marked alterations were not observed. Total macroergic substances were not altered in brain after the single treatment and after the repeated one they were increased mainly due to the ATP increase. In myocardium total macroergic substances were decreased after the both treatments.
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PMID:[Pyridine nucleotide content in the brain and myocardium of rats under combined effect of hypercapnia, hypoxia and cooling]. 1 90

A series of investigations suggest a specific role for BCAA in the regulation of respiration. In vitro incubation studies have shown that BCAAs improve the recovery of muscle force after fatigue. Further investigations revealed that leucine plays a key role in this action and acts in a manner not dependent on its use as an energy substrate. In humans, solutions enriched with BCAA have decreased PCO2 and stimulated the ventilatory response to hypercapnia, thereby corresponding to an enhanced ventilatory sensitivity with the administration of BCAA. The mechanisms for these actions are unknown. The most viable hypothesis is based on the ability of BCAA to decrease the synthesis of serotonin due to altered transport of AAs, including tryptophan, to the brain. Clinical studies have suggested a potency of BCAA in the treatment of respiratory dysfunction of preterm infants, as well as of patients with sleep apnea related to various disease states. The clinical applications of BCAA-enriched mixtures in respiratory diseases are still experimental, and many controversies exist concerning the validity of BCAA in clinical practice. Most TPN regimens contain BCAA approximating the average intake of BCAA in the Western diet. The question therefore remains whether additional BCAA supplementation is useful to achieve the suggested metabolic and pharmacological effects. Meticulous future studies are needed to establish the therapeutic value of BCAA in the treatment of various respiratory functions.
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PMID:Branched-chain amino acids and respiration. 142 77

A-19-year old male patient complained of shortness of breath. Aspiration of the pleural fluid revealed chylothorax. Right chest tube was inserted. His ABG showed hypoxaemia with relative hypercarbia. He underwent right thoracotomy and thoracic duct ligation under general anaesthesia and double lumen endobroncheal intubation. During surgery he lost 1.5 L of blood and 4 L chyle. He was transferred to the SICU intubated and on mechanical ventilation. On the subsequent days chyle leak was reduced to a minimum of 10 ml/hr. On the 9th postoperative day the patient was extubated. He was receiving TPN 2600 kcal/day. He was transferred to the normal floor on the 15th day. After 7 day he was readmitted, his chest showed severe lung fibrosis and consolidation. His ABG showed severe hypercarbia (PaCO2 = 126 mmHg). The patient was intubated. His condition deteriorated and he was considered for lung transplantation. No donor was available. Later he arrested and died. Anaesthesia and surgical management of spontaneous chylothorax is challenging. The mortality rate is high.
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PMID:Spontaneous chylothorax--case report. 1133 Feb 18