What question did this study set out to answer?

To evaluate the binding affinity and stoichiometry of serum haptoglobin with hemoglobin and determine its regulatory role in the renal excretion of hemoglobin.

June 1, 1957Blood

Studies on the Serum Haptoglobin Level in Hemoglobinemia and Its Influence on Renal Excretion of Hemoglobin

View Full Paper

Ask AI

Bookmark

Authors

CLCarl‐Bertil LaurellMalmö University MNMargareta NymanLund University

Discussion

Member takes

Implication

Experimental study demonstrates that haptoglobin binds free hemoglobin and blocks urinary excretion, indicating that haptoglobin depletion dictates the renal threshold for hemoglobinuria.

Key Points

To evaluate the binding affinity and stoichiometry of serum haptoglobin with hemoglobin and determine its regulatory role in the renal excretion of hemoglobin.
Quantified serum haptoglobin using an electrophoretic method to measure binding characteristics at physiologic pH.
Tracked plasma clearance and urinary excretion of hemoglobin and hemoglobin-haptoglobin complexes following intravenous hemoglobin administration.
Each haptoglobin molecule bound at least two hemoglobin molecules at physiologic pH, forming a complex cleared from plasma at a constant rate without appearing in urine.
Free hemoglobin and hemoglobinuria only appeared after injected hemoglobin exceeded both total serum haptoglobin binding capacity and renal tubular reabsorption capacity.
Sufficient hemoglobin administration depleted serum haptoglobin to zero within 24 hours, directly explaining baseline individual variations in the renal threshold for hemoglobin.

Cite This Study

Laurell et al. (1957) studied this question.

synapsesocial.com/papers/6a887bed962c3e9431cf0a06 https://doi.org/10.1182/blood.v12.6.493.493

View Full Paper

Ask AI

Bookmark

Implication

Experimental study demonstrates that haptoglobin binds free hemoglobin and blocks urinary excretion, indicating that haptoglobin depletion dictates the renal threshold for hemoglobinuria.

Studies on the Serum Haptoglobin Level in Hemoglobinemia and Its Influence on Renal Excretion of Hemoglobin

Discussion

Member takes

Implication

Key Points

Cite This Study

Studies on the Serum Haptoglobin Level in Hemoglobinemia and Its Influence on Renal Excretion of Hemoglobin

Discussion

Member takes

Implication

Key Points

Cite This Study

Also Consider

Also Consider