No abstract

Twenty-four chronic alcohol abusers hospitalized during a twenty-seven-month period were suspected of having "alcoholic ketoacidosis" because they had ketonuria or ketonemia with little or no glucosuria. Twenty-one had moderate or severe ketosis, with plasma 3-hydroxybutyrate of 5.2 to 22.5 mmol/L. Fifteen of this group were not diabetic, while six were later found to have mild postprandial hyperglycemia without glycosuria. Three patients who had continued to drink until shortly before admission, though at first suspected of having alcoholic ketosis, were found to have predominant lactic acidosis, with minor elevations of plasma 3-hydroxybutyrate. In contrast to previously reported patients with "alcoholic ketoacidosis", severe acidemia was uncommon in this series. Indeed, seven patients were alkalemic, because of coexisting respiratory or metabolic alkalosis. Most patients had eaten poorly for several days (and usually longer) and had allegedly decreased their alcohol intake during that period. That history, and the usual rapid clearing of ketosis simply by treatment with solutions of glucose and NaCl, suggested that acute starvation was an important factor in the pathogenesis of this disorder. Four patients were treated with insulin and four with NaHCO3 solutions. In retrospect, the need for either of these treatments was not clear. Two of the twenty-four patients died, one from circulatory failure secondary to hemorrhage and the other from pulmonary edema, but no patient died because of ketoacidosis per se.

Formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde, isobutyraldehyde, and acrolein, all of which are constituents of tobacco smoke, were reacted in 5 mM concentration with the purified major fraction of normal adult human hemoglobin (hemoglobin Ao) in 1 mM concentration. A cigarette smoke condensate, diluted to contain 5 mM total aldehydes, was also reacted with 1 mM hemoglobin Ao. Cationic exchange high-performance liquid chromatography (HPLC) showed that the products formed from simple aliphatic aldehydes, with the exception of formaldehyde, were analogues of those formed from acetaldehyde, earlier shown by us to be imidazolidinone derivatives, that is, cyclic addition products of the N-terminal aminoamide function of alpha and beta chains. Formaldehyde and acrolein produced a heterogeneous mixture of derivatives including cross-linked hemoglobin dimers. The greater proportion of modified hemoglobins produced by condensate aldehydes resembled those formed from acetaldehyde, the most abundant aldehyde in the condensate. A smaller fraction consisted of cross-linked hemoglobin dimers, presumably due to the action of formaldehyde. Mass spectrometric and HPLC analyses of the 2,4-dinitrophenylhydrazones precipitated from the condensate documented the presence of formaldehyde, acetaldehyde, propionaldehyde, butyraldehyde, furfural, and methylfurfural. The toxicity of aldehydes is briefly discussed in the context of the findings of this study.

No abstract

~~-2-Deuteriolactic acid has been prepared with incorporation of deuterium in approximately 75 atom per cent excess by concurrent hydrolysis and decarboxylation of bromomethylmalonic acid in refluxing deuterium oxide or by prior decarboxylation of the deuterium exchanged solid bromo di-acid to 2-deuterio-2-bromopropionic acid followed by hydrolysis with zinc carbonate.

No abstract

No abstract

No abstract