Comparison of different methods for telomere length measurement in whole blood and blood cell subsets: Recommendations for telomere length measurement in hematological diseases

2017 ◽  
Vol 56 (9) ◽  
pp. 700-708 ◽  
Author(s):  
Yvonne Lisa Behrens ◽  
Kathrin Thomay ◽  
Maike Hagedorn ◽  
Juliane Ebersold ◽  
Lea Henrich ◽  
...  
Keyword(s):  
Blood Cell ◽  
Telomere Length ◽  
Whole Blood ◽  
Length Measurement ◽  
Hematological Diseases

scholarly journals Telomere length varies substantially between blood cell types in a reptile

2020 ◽  
Vol 7 (6) ◽  
pp. 192136 ◽  
Author(s):  
Mats Olsson ◽  
Nicholas J. Geraghty ◽  
Erik Wapstra ◽  
Mark Wilson
Keyword(s):  
Blood Cell ◽  
Telomere Length ◽  
Whole Blood ◽  
Phylogenetic Analyses ◽  
Natural Populations ◽  
Cell Types ◽  
Tissue Type ◽  
Telomeric Dna ◽  
Blood Cell Type ◽  
Widespread Phenomenon

Telomeres are repeat sequences of non-coding DNA-protein molecules that cap or intersperse metazoan chromosomes. Interest in telomeres has increased exponentially in recent years, to now include their ongoing dynamics and evolution within natural populations where individuals vary in telomere attributes. Phylogenetic analyses show profound differences in telomere length across non-model taxa. However, telomeres may also differ in length within individuals and between tissues. The latter becomes a potential source of error when researchers use different tissues for extracting DNA for telomere analysis and scientific inference. A commonly used tissue type for assessing telomere length is blood, a tissue that itself varies in terms of nuclear content among taxa, in particular to what degree their thrombocytes and red blood cells (RBCs) contain nuclei or not. Specifically, when RBCs lack nuclei, leucocytes become the main source of telomeric DNA. RBCs and leucocytes differ in lifespan and how long they have been exposed to ‘senescence' and erosion effects. We report on a study in which cells in whole blood from individual Australian painted dragon lizards ( Ctenophorus pictus ) were identified using flow cytometry and their telomere length simultaneously measured. Lymphocyte telomeres were on average 270% longer than RBC telomeres, and in azurophils (a reptilian monocyte), telomeres were more than 388% longer than those in RBCs. If this variation in telomere length among different blood cell types is a widespread phenomenon, and DNA for comparative telomere analyses are sourced from whole blood, evolutionary inference of telomere traits among taxa may be seriously complicated by the blood cell type comprising the main source of DNA.

scholarly journals Assessment of Donkey (Equus asinus africanus) Whole Blood Stored in CPDA-1 and CPD/SAG-M Blood Bags

Biology ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 133
Author(s):  
Isabella Oliveira Barros ◽  
Rejane Santos Sousa ◽  
Marcondes Dias Tavares ◽  
Renato Otaviano Rêgo ◽  
Paulo Ricardo Firmino ◽  
...  
Keyword(s):  
Blood Cell ◽  
Cell Count ◽  
Whole Blood ◽  
Blood Collection ◽  
Blood Gas ◽  
Blood Cell Count ◽  
Animal Blood ◽  
Equus Asinus ◽  
Citrate Phosphate Dextrose ◽  
Citrate Phosphate

Hemotherapy using whole blood and its components is being increasingly used in veterinary therapy. Since it is important to store animal blood while maintaining acceptable hematological, blood gas, and biochemical characteristics, increasing our knowledge of available technologies for strategic blood storage is imperative. Thus, we aimed to assess the hematological, blood gas, and biochemical changes in donkey whole blood using blood bags with two different types of storage agents. Eight adult healthy male donkeys were used; 900 mL of blood was collected from each, with 450 mL stored in citrate-phosphate-dextrose and adenine bags (CPDA-1) and 450 mL stored in bags containing citrate-phosphate-dextrose, adenine, mannitol, and sodium chloride (CPD/SAG-M). Both bags were kept refrigerated between 1 and 6 °C for 42 days. Blood samples were removed from the bags eight times (T): T0 (immediately after blood collection), T1, T3, T7, T14, T21, T35, and T42 (1, 3, 7, 14, 21, 35 and 42 days after storage). Hematological, blood gas, biochemical, and microbiological parameters were assessed. The CPDA-1 bags had a higher packed cell volume when compared to CPD/ SAG-M. The red blood cell count reduced by around 19% in both the bags due to hemolysis, which was confirmed by an increase in plasma hemoglobin. The white blood cell count; pH; concentrations of glucose, sodium, bicarbonate, and 2,3 diphosphoglycerate were reduced in both bags. Meanwhile, pO2, pCO2, lactate dehydrogenase, and levels of potassium increased in the CPDA-1 and CPD/SAG-M bags. Blood bags were efficient for the storage of donkey blood for up to 42 days.

In vitro effects of temperature on red blood cell deformability and membrane stability in human and various vertebrate species

2021 ◽  
pp. 1-10
Author(s):  
Adam Attila Matrai ◽  
Gabor Varga ◽  
Bence Tanczos ◽  
Barbara Barath ◽  
Adam Varga ◽  
...  
Keyword(s):  
Blood Cell ◽  
Red Blood Cell ◽  
Whole Blood ◽  
Mechanical Stability ◽  
Cell Deformability ◽  
Blood Samples ◽  
Effects Of Temperature ◽  
The Way ◽  
Rbc Deformability

BACKGROUND: The effects of temperature on micro-rheological variables have not been completely revealed yet. OBJECTIVE: To investigate micro-rheological effects of heat treatment in human, rat, dog, and porcine blood samples. METHODS: Red blood cell (RBC) - buffer suspensions were prepared and immersed in a 37, 40, and 43°C heat-controlled water bath for 10 minutes. Deformability, as well as mechanical stability of RBCs were measured in ektacytometer. These tests were also examined in whole blood samples at various temperatures, gradually between 37 and 45°C in the ektacytometer. RESULTS: RBC deformability significantly worsened in the samples treated at 40 and 43°C degrees, more expressed in human, porcine, rat, and in smaller degree in canine samples. The way of heating (incubation vs. ektacytometer temperation) and the composition of the sample (RBC-PBS suspension or whole blood) resulted in the different magnitude of RBC deformability deterioration. Heating affected RBC membrane (mechanical) stability, showing controversial alterations. CONCLUSION: Significant changes occur in RBC deformability by increasing temperature, showing inter-species differences. The magnitude of alterations is depending on the way of heating and the composition of the sample. The results may contribute to better understanding the micro-rheological deterioration in hyperthermia or fever.

scholarly journals Preanalytical Conditions and DNA Isolation Methods Affect Telomere Length Quantification in Whole Blood

PLoS ONE ◽  
2015 ◽  
Vol 10 (12) ◽  
pp. e0143889 ◽  
Author(s):  
Alexander Tolios ◽  
Daniel Teupser ◽  
Lesca M. Holdt
Keyword(s):  
Telomere Length ◽  
Whole Blood ◽  
Dna Isolation ◽  
Isolation Methods ◽  
Preanalytical Conditions

Application of the Colorimetric Whole-Blood Method to the Measurement of Bovine Red-Blood-Cell Cholinesterase Activity

1958 ◽  
Vol 51 (3) ◽  
pp. 326-329 ◽  
Author(s):  
William E. Robbins ◽  
Theokore L. Hopkins ◽  
A. R. Roth
Keyword(s):  
Blood Cell ◽  
Red Blood Cell ◽  
Whole Blood ◽  
Cholinesterase Activity

scholarly journals Transcriptomic analyses and leukocyte telomere length measurement in subjects exposed to severe recent stressful life events

2017 ◽  
Vol 7 (2) ◽  
pp. e1042-e1042 ◽  
Author(s):  
N Lopizzo ◽  
S Tosato ◽  
V Begni ◽  
S Tomassi ◽  
N Cattane ◽  
...  
Keyword(s):  
Telomere Length ◽  
Life Events ◽  
Stressful Life Events ◽  
Length Measurement ◽  
Stressful Life ◽  
Leukocyte Telomere Length
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