Internalization of inositol hexaphosphate (IHP) in mammalian red blood cells (RBC) produces a modification of the hemoglobin-oxygen affinity, leading to a rightward shift of the dissociation curve. The process of incorporation, based on an osmotic shock, has been tested on RBC of different species. Two dialysis protocols have been defined to transform RBC, the first one for small volumes in a cellulose bag and the other for larger volumes using a commercially available dialysis device. Different optimal conditions must be used for each species. Most of the cellular characteristics of the transformed RBC having encapsulated IHP are similar to those of native cells. For several species, such modified RBC could be reinfused and used for physiological studies.

Download full-text PDF

Source
http://dx.doi.org/10.1111/j.1470-8744.1989.tb00049.xDOI Listing

Publication Analysis

Top Keywords

mammalian red
8
red blood
8
blood cells
8
rbc
5
modification partial
4
partial pressure
4
pressure oxygen
4
oxygen p50
4
p50 mammalian
4
cells incorporation
4

Similar Publications

Clinical and imaging spectrum of non-congenital dominant ACTN2 myopathy.

J Neurol

January 2025

Department of Neurology and Neurosciences, Donostia University Hospital, Biogipuzkoa Health Research Institute, Donostia-San Sebastián, Spain.

Background: Alpha-actinin-2, a protein with high expression in cardiac and skeletal muscle, is located in the Z-disc and plays a key role in sarcomere stability. Mutations in ACTN2 have been associated with both hypertrophic and dilated cardiomyopathy and, more recently, with skeletal myopathy.

Methods: Genetic, clinical, and muscle imaging data were collected from 37 patients with an autosomal dominant ACTN2 myopathy belonging to 11 families from Spain and Belgium.

View Article and Find Full Text PDF

Polyunsaturated fatty acids (PUFAs) including omega-3 and omega-6 are obtained from diet and can be measured objectively in plasma or red blood cells (RBCs) membrane biomarkers, representing different dietary exposure windows. In vivo conversion of omega-3 and omega-6 PUFAs from short- to long-chain counterparts occurs via a shared metabolic pathway involving fatty acid desaturases and elongase. This analysis leveraged genome-wide association study (GWAS) summary statistics for RBC and plasma PUFAs, along with expression quantitative trait loci (eQTL) to estimate tissue-specific genetically predicted gene expression effects for delta-5 desaturase (FADS1), delta-6 desaturase (FADS2), and elongase (ELOVL2) on changes in RBC and plasma biomarkers.

View Article and Find Full Text PDF

Sperm activation occurring in both male and female reproductive tract involves a highly complex series of biomolecular dynamics, particularly on membrane lipids and proteins. In mammals, the universal anticipation in cholesterol (CHO) sequestration plays a role in mammalian sperm maturation/capacitation, subsequently enhancing sperm fertilizing ability. In shrimp, we have previously shown that the level of cholesterol (CHO) is significantly reduced in vas deferens sperm when compared with sperm in the testes, presumably due to the sequestering action of the lipid-binding protein, one of which is Niemann-Pick Type C-2 (NPC2).

View Article and Find Full Text PDF

Background: Pelvic fractures often result in traumatic and intraoperative blood loss. Cell salvage (CS) is a tool where autologous blood lost during surgery is collected and recycled with anticoagulation, centrifugation to separate red blood cells, and washing to be reinfused back to the patient. The purpose of this study was to investigate our experience with CS in pelvic and acetabular surgery and its relationship to perioperative transfusion requirements.

View Article and Find Full Text PDF

Pseudohaematuria Due to Mesalazine: A Case Report.

Nephrology (Carlton)

January 2025

School of Pharmacy, Faculty of Medicine and Health, The University of Sydney, Sydney, Australia.

The symptom of macroscopic or 'visible' haematuria can cause significant patient distress, largely due to its' potential association with urinary tract malignancy, infection or glomerular disease. This lesson from practice describes the case of a 19-year-old female patient for whom the cause of red/brown urinary discolouration was found to relate to a reaction between renally excreted mesalazine and domestic bleach in the toilet bowel. Recognition of this phenomenon in patients taking mesalazine for inflammatory colitis is important to minimise patient distress and unnecessary investigation for a urinary tract cause.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!