Keywords: Nanotechnology; Preserved Red Blood Cells; Magnetite Nan particles (ICNB); Method of Additive Modernization of Preservation Solutions; Rbcs Storage; Production Process
While increased research effort is being directed to better understand the effects of storage on RBCs and the potential impact on transfusion outcomes [7], slower progress is being made in finding ways to deter the detrimental effects of the RBCs storage lesion.
Over the past 15 – 20 years, research into the development of new additive solutions has focused on ways to maintain higher intracellular levels of ATP and 2.3-DPG during storage of RBC components [1].
Despite the RBCs having been a favorite experimental model for cellular biologists and biochemists, RBCs storage research has repeatedly demonstrated that a lot of fundamental biology about RBCs is still not well understood. The complexity of the interrelationship between RBCs biochemistry, cytoskeleton structure and membrane properties have made it difficult to predict how RBCs will respond to different storage conditions. Exposure of RBCs to non-physiological storage environments has pointed to the existence of previously unknown biochemical mechanisms in RBCs, including apoptotic-like processes, ion and osmotic channels that behave differently than expected, exposure of new or altered receptors possibly due to oxidative and/or protease/ glycosidase activities or altered senescence [8-11].
The benefits gained by improved RBCs component quality should more than justify any real or perceived inconvenience to the blood services in implementing adjustments to their processing procedures or additional processing costs of the introduction of new generation RBCs additive solutions. The bigger challenge that has hindered the advancement of this field is the significant financial burden and risk for manufacturers of blood collection systems to obtain licensure and to bring a new RBCs storage system to a market that is inherently based on very low profit margins, such as the blood services sector.
The financial burden to technology developers of new RBC storage systems is largely due to regulatory requirements, particularly those mandated by the FDA. In addition to in vitro data, the FDA requires in vivo data on the 24 hours post transfusion recovery of transfused autologous RBCs. Recently the FDA has tightened and increased the assessment and acceptance criteria making it potentially more difficult and expensive to bring new RBCs storage systems to market. Although the regulatory agencies are to be commended for focusing on the safety of new therapies and devices for patients, there are concerns that the regulatory requirements for RBC storage systems have become excessive and are hindering progress [12].
Another significant challenge for obtaining licensure of new RBCs storage systems is the inherent donor-related variability in stored RBCs quality. It has long been recognised that RBCs from some donors do not store well, as evidenced by higher levels of haemolysis at RBC component expiry 14 and poorer in vivo 24 hr recovery data [13]. The relationship of specific donors and poorer quality of some stored RBCs components was confirmed in a recent paired cross-over study designed to compare manual and automated whole blood processing methods [14, 15]. Technology developers are unwilling to take on the risk that a random poor quality RBCs component could jeopardize the success of licensure tests and clinical trials of their new blood storage systems and their significant financial investment.
In Ukraine, the first standardized and biocompatible magnetite nanoparticles for medical use were manufactured and patented in 1998. These are intracorporal nanobiocorrector of brand ICNB, magnet-controlled sorbent of brand MCS-B and biologically active nanodevice of brand Micro mage-B [16].
It is well established that the magnetite nanoparticles effectively modulate the metabolic processes in leukocytes, regulate activity of the enzyme link of the antioxidant system in erythrocytes in healthy and sick patients [17-19]. Previously the complex investigations that were performed in the study of the influence on metabolism of cells by preparations of nanotechnology show that in whole standardized biocompatibility of magnetite nanoparticles have nonspecific and modulated effect on metabolic processes. Research of ultra structure investigations of the reticuloendothelial system (liver, lungs and kidneys) it was proved that after injection of biocompatibility magnetite nanoparticles into a vein caused nonspecific activation of the metabolic processes, increase adaptive mechanisms and potential of organelle cells, acceleration of reparative processes a level of membranes and macromolecules [18, 20, 21]. Existing sorption and indirect (magnetic) effects not only allow selectively absorb the protein of surface membrane cells by magnetite nanoparticles (according to the principle of magnetophoreses), but also to prevent the oxidative modification of proteins by way of stabilizing the active groups, normalizing a state of receptors that are located on the surface membrane of cells, increasing activity of enzymes’ membrane-bound [22-24].
Recent scientific work related to use of magnetite nanoparticles (ICNB) in contrast means in an MRI investigation of cancer reliably was shown that nanoparticles cause reversible changes associated with a temporary increase in the mobility of hydrogen protons in the per cellular fluid that inevitably modifies the metabolism in malignant cells [25]. The results of these investigations have not only widened the understanding of the mechanisms of action of nanoparticles on condition outside and intracellular spaces but also have revealed new aspects of the cellular(cells) metabolism, determined the membrane role of cellular enzymes in the regulation processes of metabolism [23, 26-29].
Also, it was established that extra corporally processing the blood by nanoparticles of MCS-B reliably reduces activity of Ca, Mg - АТPHese of erythrocytes.
Currently, studies have shown that magnetite nanoparticles are able to inhibit hemolysis of heparin zed blood, increase the activity of ATP and 2.3 DPH in red blood cells, regulate transmembrane metabolism and inhibit eryptosis [23, 30, and 31].
The above was the basis for the choice of the theme of this study, devoted to the learning of the use of nanotechnology to correct the functional activity of red blood cells at the storage stages at a positive temperature.
The main purpose of the first stage of the study is to develop a simple and practical method of additive modernization of preservation solutions that does not violate the compliance requirements, improves the quality, efficiency and safety transfusion of red blood cells.
Phase name |
a (Ǻ) |
b (Ǻ) |
c (Ǻ) |
Alpha(град) |
Beta(град) |
gamma(грд) |
magnetite low |
8.387836 |
8.387836 |
8.387836 |
90.000000 |
90.000000 |
90.000000 |
magnetite low, syn |
5.930687 |
5.930687 |
14.70591 |
90.000000 |
90.000000 |
120.000000 |
Johannsenite |
9.89168 |
9.059276 |
5.282908 |
90.000000 |
105.540001 |
90.000000 |
Compound |
Wt% |
Std Err |
El |
Weight%/ O2 |
Std Err |
El |
Weight % |
Std Err |
Fe3O4 |
97.37 |
0.09 |
Fe |
68.4 |
0.07 |
Fe |
97.62 |
0.09 |
CaO |
2.26 |
0.07 |
Ca |
1.71 |
0.05 |
Ca |
2.3 |
0.07 |
P2O5 |
0.28 |
0.027 |
Px |
0.122 |
0.012 |
Px |
0.157 |
0.015 |
MnO |
0.255 |
0.013 |
Mn |
0.198 |
0.01 |
Mn |
0.278 |
0.014 |
SiO2 |
0.098 |
0.027 |
Si |
0.046 |
0.013 |
Si |
0.059 |
0.016 |
SO3 |
0.032 |
0.013 |
Sx |
0.0126 |
0.0051 |
Sx |
0.0164 |
0.0066 |
Cl |
0.028 |
0.009 |
Cl |
0.028 |
0.009 |
Cl |
0.038 |
0.012 |
Phase |
Formula |
Space group |
№ Card Database ICDD |
magnetite low |
Fe2.886 O4 |
227 : Fd-3m, choice-2 |
10861339 (ICDD) |
magnetite low, syn |
Fe3O4 |
166 : R-3m, hexagonal |
10716766 (ICDD) |
Johannsenite |
Ca Mn +2 Si2O6 |
15 : C12/c1, unique-b,cell-1 |
380413 (ICDD) |
Phases (method of corundum numbers) |
Content, % |
magnetite low |
71 |
magnetite low, syn (hexagonal) |
29 |
- Theoretical osmolality of colloid solution is 500 mosmol/l
- Size of magnetite nanoparticles is 6-12 nm;
- Total area of surface magnetite of nanoparticles Ss = 800-1200 m2/g;
- Magnetization of saturation Is = 2.15 кА/m;
- ζ - Potential = - 19 mV.
- 0.9% NaCl solution
- 0.9% NaCl solution which previously was processed by ICNB in ratio 4:1
The tests were performed on the Siemens MR-tomography Magneton Concerto with power magnetic-field 0.2 T.
2. T2 - the self-weighted sequences Echo Gradient of TR 500 ms, TE 17 ms the field of review a 180 mm, the thickness cut 4 mm.
Of each bag of 3 ml amounts of red blood cells was distributed into 20 sterile glass tubes. Then, into the first 10 tubes of control were added of 2 ml amounts 0.9% NaCl solution. Into the next 10 tubes of test were added of 2 ml amounts 0.9% NaCl solution, which previously was processed by ICNB.
Thus, the distribution of tubes was as the follows: Tubes of control:
- 3 ml of red blood cells (CPD) +2 ml 0.9% NaCl solution (n=10);
- 3 ml of red blood cells (CPDA-1) +2 ml 0.9% NaCl solution (n=10). Tubes of test:
- 3 ml of red blood cells (CPD) +2 ml 0.9% NaCl solution that previously was processed by ICNB in ratio 4:1 (n=10);
- 3 ml of red blood cells (CPDA-1) +2 ml 0.9% NaCl solution that previously was processed by ICNB in ratio 4:1 (n=10).
The state of red blood cells was determined visually by the registration of signs of hemolysis. Also, hemolysis was controlled by photometric method by means Plasma / Low Hb and GPHP-01 devices. The centrifuge mark of SM-70M-07 was used to obtain supernatant. Hematocrit was calculated by means hematocrit ruler and using the formula:
Tests were carried out in six stages: day 1 - I, day 7 - II, day 14 - III, day 21 - IV, day 28 - V, day 35 – VI. The blood after performance of the biochemical investigation was stored in the refrigerating chamber at temperature +4ºС.
Statistically processing the obtained results was carried out by parametrical method of variation statistics by Student criterion. Processing the obtained data was carried out by means of Excel.
Thus, previously conducted research clearly shows that the nanoparticles of ICNB change the mobility and the orientation of the hydrogen atoms in liquids that are registered in the visual evaluation of MRI.
The next set of studies was essential and aimed at studying of functional activity of red blood cells at the storage stages at a positive temperature after by modifying the mobility and spatial orientation of hydrogen protons in the pericellular fluid using magnetite nanopatricles of ICNB.
A study of the sedimentation stability of RBCs showed a highly significant difference between control and test data. Data of sedimentation stability of the RBCs at the stages of a study were presented in Figure 2.
In this case, the change of mobility and spatial orientation of the hydrogen protons in the extracellular liquid significantly increased the sedimentation stability of RBCs in the test compared to the control. For greater clarity results of RBCs sedimentation is shown in Figure 3.
Thus, following the logic of the above reasoning, if improving sedimentation stability of RBC is associate with an increase in ATP, then the isotonic solution which previously was processed by ICNB should actively stabilize the membranes of RBCs and inhibit hemolysis. Therefore, the next investigation was to study the hemolysis processes preserved of the RBCs at various stages. Results of the visual assessment hemolysis of erythrocytes in various aspects of exposure are presenting in Figure 4a.
Figure 4b shows that in the control tubes at the stage VI of the study there are pronounced signs of hemolysis. In contrast, hemolysis is not recorded in test tubes. Visual analysis was supplemented by objective data of the photometric method, as well as the method of calculation of hematocrit.
Preservatives |
Variants |
Stage VI |
p |
|
Free Hb, g/l |
Calculation HCT, % |
|||
CPD |
Control (n=10) |
7.8 ± 0.1 |
1.84 ± 0.1 |
<0.001 |
Test (n=10) |
1.7 ± 0.1 |
0.4 ± 0.1 |
<0.001 |
|
CPDA-1 |
Control (n=10) |
8.0 ± 0.1 |
1.9 ± 0.1 |
<0.001 |
Test (n=10) |
1.6 ± 0.1 |
0.5 ± 0.1 |
<0.001 |
HCT at the stage VI of the study are presented in Table 5.
The data in table 5 indicate that in test tubes the average content of free Hb in the VI stage of the study 6.25±0.1 g/l were less than controls; and the average calculation HCT was lower by 1.42%
Microscopic examination of the morphology of erythrocytes in different variants of preservation and treatment are shown in figure 5.
Figure 5 clearly demonstrates that microscopically in the control variant at the VI stage of the study, widespread appearance of spheroechinocytes is observed. On the contrary, in the test variants, the shape of red blood cells at the stage VI was unchanged. Pathological changes in the RBC’s shape and size in the control variants are most likely associated with inhibition of glycolysis processes [35]. Consequently, the number of ATP and 2.3 DPG decreases, the permeability of the erythrocyte membranes is disturbed, the state of the hemoglobin buffer changes. As a result, the pHs of intracellular and extracellular media are changes.
The decrease in the formation of 2.3 DPG leads to the acidulation of intracellular environment of the RBCs. Deoxygenated hemoglobin which was previously formed actively binds the [H+] that comes from the extracellular environment and alkalizes the extracellular environment. The effect of RBC reduction, the appearance of widespread spheroechinocytes is observed in microscopy. Subsequently, ox hemoglobin moves to the extracellular environment as a result of processes intensification destruction of the membranes of RBCs. The accumulation of oxygenated hemoglobin in the extracellular environment causes by shifting towards the acid of the pH.
The above mechanisms have been confirmed in the study of the dynamics of pH changes in the extracellular medium of preserved of the RBCs. The dynamics of pH changes in the extracellular medium of RBCs storage at key stages of the study on the example of preserving agent CPD is shown in Figure 6.
Thus, obtained result, show that change in cytoplasmic pH is both necessary and sufficient for the shape changes of human erythrocytes [36].
The effect of hemolysis inhibition by the method of additive modernization of preservation solutions, that adapted to the manufacture process at the VI stage of the study is shown in Fig.7.
Thus, the first optimistic results were obtained on the way of creation a simple and practical method of additive modernization of preservation solutions that does not violate the compliance requirements, improves the quality, efficiency and safety transfusion of red blood cells.
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