Effects of Cell Sample Preservation Systems on Morphological Integrity, Anticoagulant Stability, and Analytical Results

Once a cell sample enters a preservation system, the analytical result is no longer determined solely by its original biological state, but is instead jointly influenced by the anticoagulation mode, osmotic environment, buffering conditions, degree of metabolic suppression, and processing timeliness. When the preservation system is inappropriately selected, the first aspects to be compromised are usually not whether the sample can still be tested, but rather the integrity of morphological boundaries, cellular dispersion, anticoagulant completeness, and the credibility of result interpretation.

 

Keywords: cell sample; preservation system; morphological integrity; anticoagulant stability; EDTA; heparin; citrate; flow cytometry; cell cryopreservation

 

1 Functional Basis of Cell Sample Preservation Systems

1.1 Functional Composition of Preservation Systems

(1) Anticoagulant components

The role of anticoagulant components is not limited to preventing macroscopically visible clotting, but extends to suppressing Ca2+-dependent coagulation processes, reducing microclot formation and fibrin filament generation, and maintaining homogeneous cellular dispersion before analysis. For blood-derived samples, the adequacy of the anticoagulation system directly determines the basic quality of automated counting, flow cytometric acquisition, and microscopic interpretation.

(2) Buffering and osmotic protection components

Buffer salts, sugars, proteins, and other protective factors determine whether the extracellular environment remains close to the original physiological state. Deviations in pH, changes in ionic strength, and osmotic abnormalities can all induce cellular shrinkage, swelling, membrane wrinkling, granular redistribution, and blurring of nuclear-cytoplasmic boundaries, thereby affecting morphology, scatter parameters, and certain quantitative indices.

(3) Metabolic suppression and stabilizing components

Some preservation systems prolong the sample stability window by reducing metabolic rate, slowing membrane transport, or limiting enzymatic activity. This type of design helps reduce ongoing metabolism during transport, but may simultaneously alter membrane surface molecule exposure, ionic redistribution, and some live-cell analytical parameters.

(4) Fixative or semi-fixative components

Some systems preserve cellular structure and part of the phenotype through mild fixation, membrane stabilization, or protein crosslinking, allowing samples to remain analyzable under delayed acquisition or multicenter transport conditions. Such systems are usually more suitable for morphology and phenotypic analysis, but not for viability assays, culture-based experiments, or most functional assays.

 

1.2 Three Main Pathways by Which Preservation Systems Affect Analytical Results

(1) Alteration of cellular structure

Once the preservation medium changes cell volume, membrane tension, cytoplasmic granule distribution, or nuclear chromatin state, both morphological interpretation and scatter signals change accordingly.

(2) Alteration of cell-cell interactions

When anticoagulation is insufficient or interfacial protection is inadequate, platelet aggregation, leukocyte adhesion, fibrin entanglement, and background debris accumulation may occur in the sample. These changes directly interfere with cell counting, gating, and microscopic observation.

(3) Ongoing change of analytes

Cells are not completely static during preservation. Glucose consumption, lactate accumulation, ionic flux, intracellular enzyme release, and surface antigen decay can all gradually shift measured values away from the state at the time of sampling.

 

1.3 Evaluation of Preservation Systems Should Not Be Limited to Whether the Sample Can Still Be Tested

(1) Whether original morphological boundaries are preserved

Some systems may preserve total cell count, yet fail to preserve the interpretive value of morphology.

(2) Whether anticoagulation and dispersion consistency are maintained

A sample may lack visible clotting, yet still contain microclots, fibrin strands, and local aggregates sufficient to affect quantitative results.

(3) Whether the system is compatible with the target analytical method

A system suitable for blood cell counting is not necessarily suitable for flow immunophenotyping; a system suitable for flow sample transport is not necessarily suitable for cell culture or viability analysis.

Table 1 Core Evaluation Dimensions of Cell Sample Preservation Systems

 

Evaluation Dimension	Main Focus	Direct Impact
Morphological integrity	Cell volume, membrane integrity, nuclear-cytoplasmic boundary, granule distribution	Morphological interpretation, microscopic observation, scatter characteristics
Anticoagulant stability	Presence of microclots, aggregation, residual fibrin	Counting accuracy, risk of flow cytometer clogging, gating deviation
Phenotypic stability	Membrane antigens, receptor exposure, staining consistency	Flow cytometry, immunodetection
Metabolic stability	Glucose consumption, lactate accumulation, ionic drift	Biochemical companion indices, functional interpretation
Viability preservation	Live-cell proportion, membrane permeability, mitochondrial status	Functional assays, culture, live/dead staining analysis
Time tolerance	Stability during room temperature or refrigerated transport	Sample turnaround and multicenter collection

 

2 Common Preservation Systems and Their Application Differences

2.1 EDTA Systems

(1) Mechanism of action

EDTA inhibits the coagulation cascade by chelating Ca2+ and is one of the most widely used anticoagulation systems in hematological cell analysis. Its advantages lie in adequate anticoagulation, relatively low microclot risk, and generally good cellular dispersion.

(2) Effects on morphology

EDTA is relatively favorable for blood cell counting, but with increasing storage time, some cells gradually exhibit volume changes and blurred morphological boundaries. For example, neutrophils may show less distinct nuclear lobulation, monocytes may display blunted cytoplasmic contours, and platelets may show swelling or increased aggregation tendency.

(3) Applicable scenarios

Suitable for complete blood count, leukocyte differential analysis, certain morphological reviews, and most short-term cell counting applications.

(4) Limitations

It is not suitable for some Ca2+-dependent functional assays, nor for situations requiring preservation of specific ionic states or downstream live-cell functional analysis. Some samples may show EDTA-dependent platelet aggregation, resulting in pseudothrombocytopenia.

 

2.2 Citrate and ACD Systems

(1) Mechanism of action

Citrate and ACD systems also achieve anticoagulation by binding Ca2+, but their ionic environments are usually milder than that of EDTA and may exert relatively less disturbance on certain cellular functions and membrane states.

(2) Effects on morphology and dispersion

These systems are more common in platelet function studies, coagulation research, and certain cell preparation workflows. Their main drawback is a more pronounced dilution effect, requiring correction when interpreting quantitative results, and their performance in routine cell counting is not necessarily superior to EDTA.

(3) Applicable scenarios

Suitable for platelet studies, certain immune cell isolation procedures, preprocessing before cell therapy, and research samples requiring a milder anticoagulation environment.

(4) Limitations

If interpreted directly according to the logic of routine whole-blood quantification, bias may easily arise due to dilution effects and ionic-environment differences.

 

2.3 Heparin Systems

(1) Mechanism of action

Heparin inhibits coagulation by enhancing antithrombin-related activity. Unlike EDTA and citrate, its anticoagulant effect is not primarily based on strong Ca2+ chelation.

(2) Effects on cellular state

Heparinized samples offer advantages in certain flow cytometric applications, cell isolation workflows, and functional assays, particularly in settings requiring higher preservation of cellular viability. However, they are not always optimal for leukocyte counting and morphological interpretation, and certain staining backgrounds and nonspecific binding may increase.

(3) Applicable scenarios

Suitable for peripheral blood mononuclear cell isolation, certain functional assays, and short-term preservation before cell stimulation experiments.

(4) Limitations

It should not be used as a simple substitute for EDTA in routine hematological morphology assessment, nor is it suitable for all immunodetection systems.

 

2.4 Fixative or Stabilizing Preservation Solutions

(1) Mechanism of action

These systems preserve cellular structure and surface antigens for a certain period through mild fixation, membrane stabilization, or protein crosslinking, allowing the sample to remain analyzable under delayed acquisition conditions.

(2) Advantages

They are of substantial value for flow immunophenotyping, multicenter sample transport, and delayed analysis, and can reduce cell fragmentation, scatter drift, and phenotypic loss during transport.

(3) Limitations

After fixation, cell viability declines, membrane permeability changes, and some antigen conformations are altered. Accordingly, these systems are not suitable for live-cell functional assays, culture experiments, or certain analyses dependent on native molecular conformations.

 

2.5 Culture Medium-Type and Cryopreservation-Type Systems

(1) Culture medium-type systems

For cultured cells in vitro, primary cell suspensions, or fragile cell samples, culture medium-type preservation systems are more suitable for short-term maintenance of membrane stability and viability. These systems are more compatible with subsequent culture and functional assays, but their anticoagulant capacity is limited and they are not appropriate for samples with high coagulation risk.

(2) Cryopreservation-type systems

Cryopreservation systems emphasize reducing ice-crystal damage and osmotic injury at low temperature. Their evaluation focuses not on short-term morphological preservation, but on post-thaw viability, membrane integrity, and functional recovery. Different serum-free, protein-free, and DMSO-free designs show clear differences in compatibility with different cell populations.

Table 2 Comparison of Common Preservation Systems in Application

 

Preservation System	Main Advantages	Main Limitations	More Suitable Detection/Application
EDTA	Adequate anticoagulation, stable counting, good dispersion	Morphological drift after prolonged storage, occasional platelet aggregation	Complete blood count, short-term morphology, cell counting
Citrate/ACD	Milder anticoagulation, suitable for certain functional studies	Dilution effect, routine quantification requires correction	Platelet studies, cell isolation, research samples
Heparin	Better viability preservation, suitable for some functional assays	Some background interference and less optimal morphological compatibility	PBMC isolation, functional assays, short-term transport
Fixative/stabilizing solution	Better preservation of phenotype and structure, suitable for delayed analysis	Not suitable for live-cell assays	Flow immunophenotyping, multicenter transport
Culture medium-type system	Viability-friendly, favorable for subsequent culture	Insufficient anticoagulation, more demanding transport conditions	Primary cells, cultured cells, functional assays
Cryopreservation system	Suitable for long-term storage and later recovery	High risk of freeze-thaw injury, requires procedural optimization	Cell banking, primary sample preservation, storage before functional assays

 

3 Effects of Preservation Systems on Morphological Integrity

3.1 Morphological Changes in Erythrocytes and Platelets

(1) Erythrocyte volume and shape

The osmotic pressure, pH, and ionic composition of a preservation system can directly alter erythrocyte volume and membrane tension. In hypertonic environments, erythrocytes tend to crenate; in hypotonic environments, they tend to swell. Even when the overall count changes little, MCV, RDW, and microscopic morphology interpretation may still shift.

(2) Platelet swelling and aggregation

Platelets are highly sensitive to anticoagulation mode and preservation time. EDTA-related platelet swelling may affect parameters such as MPV; in some samples, the anticoagulant may also induce platelet aggregation, causing pseudo-reduced platelet counts.

 

3.2 Stability of Leukocyte Morphology

(1) Neutrophils

With prolonged storage, the first change in neutrophils is usually not a marked decrease in count, but rather blunting of nuclear lobulation boundaries, reduced granule distinguishability, and mild vacuolization.

(2) Monocytes

Monocytes are relatively sensitive to preservation systems and temperature, and readily develop irregular cytoplasmic margins, increased vacuolization, and drift in scatter characteristics, making them vulnerable in both flow cytometric and morphological analysis.

(3) Lymphocytes

Lymphocytes generally show better tolerance, but under inappropriate preservation conditions they may still undergo reduced membrane integrity, cellular shrinkage, and surface antigen decay, particularly in delayed analysis.

 

3.3 Body Fluid Cells and Fragile Cell Samples

(1) Cerebrospinal fluid, pleural/ascitic fluid, lavage fluid

These samples typically have low cell concentrations and fragile cells. Without appropriate protective systems, the cells are highly prone to fragmentation, deformation, or nuclear pyknosis within a short period.

(2) Tumor cells and primary cells

Primary tumor cells, circulating tumor cells, and certain large abnormal cells are more sensitive to osmotic pressure and mechanical stress. If the preservation system emphasizes anticoagulation while neglecting membrane protection, both morphology and flow cytometric results often deteriorate simultaneously.

 

4 Effects of Preservation Systems on Anticoagulant Stability

4.1 Adequate Anticoagulation Does Not Necessarily Mean Stable Analysis

(1) Absence of visible clotting does not mean absence of interference

Some samples may have no visible clots yet have already formed microclots or fibrin strands sufficient to affect flow cytometric acquisition, automated counting, and cell population classification.

(2) Uneven anticoagulation is a common hidden problem

Insufficient mixing after sampling, locally high cell density, or inappropriate preservative-to-sample ratios may result in local coagulation occurring first. Such samples are often difficult to identify promptly by visual inspection alone.

 

4.2 Differences in Stability Among Anticoagulant Systems

(1) EDTA is more suited to routine quantitative stability

For blood cell counting, EDTA is still usually the most stable conventional option.

(2) Citrate is more oriented toward functional compatibility

Its advantage lies in being milder, but quantitative interpretation requires greater caution.

(3) Heparin is more oriented toward viability preservation

Its value lies in retaining certain functional states, but it is not necessarily optimal in standardized quantification and morphological boundary preservation.

 

4.3 Amplifying Effects of Transport and Temperature on Anticoagulant Stability

(1) Elevated temperature

This accelerates cellular metabolism and certain cell injury processes, and may further increase the risk of microclot formation associated with insufficient anticoagulation.

(2) Lower temperature is not always better

Excessively low temperature may reduce membrane fluidity, induce cold-related aggregation, or significantly impair the viability of certain cellular subpopulations. Different preservation systems do not share the same tolerance range for low temperature.

(3) Mechanical agitation

Repeated agitation during transport can accelerate fragmentation of morphologically fragile cells and make pre-existing microclots more difficult to identify before analysis.

Table 3 Anticoagulant Stability and Common Interference Manifestations

 

Interference Manifestation	Common Cause	Direct Impact on Analysis
Microclots	Inadequate anticoagulation, insufficient mixing, local coagulation	Underestimation of counts, clogging, abnormal population classification
Fibrin strands	Incomplete coagulation inhibition or delayed processing	Increased flow cytometry background, automated analytical abnormalities
Platelet aggregation	Anticoagulant-dependent reaction, low temperature, transport disturbance	Pseudothrombocytopenia
Leukocyte adhesion/clumping	Mismatched preservation system, insufficient interface protection	Distorted leukocyte differential results
Increased cell debris	Prolonged transport time, insufficient protection	Increased background noise, shifted scatter-based populations

 

5 Effects of Preservation Systems on Analytical Results

5.1 Effects on Cell Counting Results

(1) True changes and pseudo-changes in total count

After prolonged preservation, the total cell count may not immediately decrease substantially, but microclots, aggregation, and fragmentation may distort instrument readouts, manifesting as pseudo-reduction or abnormal subpopulation proportions.

(2) Drift in volume-related parameters

Changes in cell volume directly affect MCV, MPV, and flow cytometric scatter parameters. Accordingly, some apparent parameter changes primarily reflect preservation-system effects rather than genuine biological variation.

 

5.2 Effects on Flow Cytometric Results

(1) Scatter signal drift

Cellular shrinkage, swelling, granular redistribution, and fragmentation can all alter FSC/SSC distribution, causing gating boundaries to no longer correspond to the state at the time of sampling.

(2) Surface antigen decay or conformational alteration

Some membrane antigens are sensitive to time, temperature, and fixation state. A preservation system that merely ensures that cells remain present does not guarantee that phenotypic readouts remain reliable.

(3) Increased nonspecific background

Cell debris, dead cells, altered membrane permeability, and uncleared fibrin can all increase fluorescence background and nonspecific binding.

 

5.3 Effects on Morphological and Microscopic Interpretation

(1) Blurring of nuclear-cytoplasmic boundaries

This is one of the most common time-dependent changes.

(2) Altered granule and vacuole appearance

This affects assessment of activation status, abnormal cells, and toxic changes.

(3) Reduced sensitivity for recognition of abnormal cells

Once cells lose their original contour, the sensitivity of identifying atypical lymphocytes, blasts, and tumor cells declines significantly.

 

5.4 Effects on Functional Assays and Culture Experiments

(1) Insufficient viability preservation

Fixative and strongly stabilizing systems are generally unsuitable for downstream culture and functional assays.

(2) Bias in metabolic readouts

Glucose consumption, lactate accumulation, and ionic redistribution during preservation can affect functional interpretation.

(3) Reduced stimulus responsiveness

For samples intended for cell stimulation, secretion, or proliferation assays, the mildness of the preservation system is usually more important than the strength of anticoagulation.

 

6 Selection Strategies for Preservation Systems

6.1 When the Goal Is Routine Cell Counting and Differential Analysis

(1) EDTA systems should generally be prioritized

They usually provide the best stability in routine hematological cell counting.

(2) The time window must still be controlled

Use of EDTA does not mean analysis can be postponed indefinitely. Morphological drift and platelet-related bias still accumulate progressively.

 

6.2 When the Goal Is Flow Immunophenotyping

(1) For short-term analysis, mild anticoagulant systems should be prioritized

If acquisition will occur within a short time, either EDTA or heparin systems may be considered, but compatibility with the intended antibody panel should be verified.

(2) For delayed analysis, stabilizing preservation solutions should be prioritized

Especially in multicenter collection or long-distance transport scenarios, phenotypic stability usually takes priority over viability preservation.

 

6.3 When the Goal Is Functional Assays or Cell Culture

(1) Avoid fixative systems;

(2) Prioritize heparin-based or culture medium-type preservation systems;

(3) Minimize transport and waiting time.

 

6.4 When the Goal Is Fragile Samples or Low-Cell-Count Samples

(1) Prioritize preservation systems characterized by membrane protection and low-damage properties;

(2) Minimize agitation and temperature fluctuation;

(3) Establish dedicated rapid-processing workflows when necessary.

Table 4 Selection Strategies for Preservation Systems According to Different Analytical Objectives

 

Analytical Objective	More Suitable Preservation System	Key Selection Consideration
Routine blood cell counting	EDTA system	Adequate anticoagulation, stable counting, relatively good short-term morphological preservation
Platelet function or certain research samples	Citrate/ACD system	Mild anticoagulation, better functional compatibility
PBMC isolation and some viability-based assays	Heparin system	Better preservation of cellular viability
Delayed flow cytometric acquisition	Stabilizing / mildly fixative system	Priority to phenotypic and scatter stability
Primary cell culture	Culture medium-type preservation system	Priority to viability and membrane integrity
Fragile low-cell-count samples	Protective low-damage system	Reduction of fragmentation and transport injury

 

7 Products Related to Cell Sample Preservation Systems

Table 5 Core Reagents for Cell Sample Preservation Systems

 

Name	CAS No.	Experimental Stage	Key Use	Notes for Use
Dipotassium ethylenediaminetetraacetate (K2EDTA)	25102-12-9	Anticoagulant preservation	Used for anticoagulation of whole blood and some cell suspensions, maintaining short-term dispersion and counting stability	Suitable for routine cell counting and some morphological assays; prolonged standing may cause volume and morphology drift
Tripotassium ethylenediaminetetraacetate (K3EDTA)	65501-24-8	Anticoagulant preservation	Used in automated blood collection and routine hematological testing systems	The liquid anticoagulant form may introduce a mild dilution effect, which should be considered in quantitative interpretation
Sodium heparin	9041-08-1	Anticoagulant preservation	Suitable for some live-cell isolation procedures, preprocessing before functional assays, and short-term viability preservation	More suitable for functional and isolation scenarios and should not be used as a simple substitute for routine EDTA systems
Lithium heparin	9045-22-1	Anticoagulant preservation	Suitable for some cell functional analyses and short-term preservation systems	Relatively favorable for viability preservation, but not compatible with all morphological assays
Sodium citrate	6132-04-3	Mild anticoagulation	Suitable for platelet-related research, mild anticoagulation, and preservation of some research samples	Has a dilution effect, so routine quantitative analysis requires correction
Citric acid	77-92-9	Preparation of ACD/CPD systems	Used as a component in mild anticoagulant and buffer systems	Usually combined with sodium citrate and glucose; not used alone as a complete preservation solution
D-Glucose	50-99-7	Energy support	Used in ACD and related preservation systems to provide short-term energy support	Can delay certain forms of metabolic failure but cannot replace a complete protective system
HEPES	7365-45-9	Buffer protection	Used to maintain pH stability in preservation systems and reduce acid-base drift during transport	Suitable for short-term transport and stabilization under room-temperature handling conditions
Trehalose dihydrate	6138-23-4	Membrane protection / low-temperature protection	Used for membrane stabilization in fragile cell samples and some cryopreservation systems	More suitable as an auxiliary protective component used together with proteins or buffer systems
Glycerol	56-81-5	Osmotic protection / low-temperature protection	Used in studies of osmotic protection or low-temperature protection for some cells and special samples	Concentration must be strictly controlled; excessive amounts may cause osmotic injury
Human serum albumin (HSA)	70024-90-7	Protein protection	Used in preservation systems for clinical translation and cell therapy-related samples	More suitable for systems requiring higher clinical compatibility
Paraformaldehyde	30525-89-4	Fixative preservation	Used to fix cellular structure and preserve morphology and part of the phenotype	After fixation, it is unsuitable for viability testing, culture, and most functional assays
DNase I	9003-98-9	Aggregation control / sample dispersion	Used to reduce cell aggregation caused by free DNA in highly fragmented samples	Suitable for dispersion processing of necrosis-rich samples or post-digestion tissue samples

 

Table 6 Products Related to Cell Sample Preservation Systems

 

Catalog No.	Name	Grade and Purity	Applicable Research Direction / Use
T1518659	TCT Cell Preservation Solution	BioReagent,ready-to-use	Suitable for preservation of cytological samples such as cervical exfoliated cells and used to maintain cellular dispersion, morphological boundaries, and consistency in subsequent microscopy and liquid-based cytology analysis
S1518661	Cell Preservation Solution	BioReagent,ready-to-use	Suitable for short-term preservation and transport of general cell samples, balancing morphological preservation and pre-analytical sample stability
F1373929	Flow Cytometry-Specific Cell Storage Solution Type I	BioReagent, sterile-filtered	Suitable for preservation of flow cytometry samples and delayed acquisition, helping maintain cellular scatter characteristics, reduce debris background, and improve phenotypic stability
F1373931	Cell Storage Solution Type I (EDTA-K2)	BioReagent, sterile-filtered	Suitable for preservation of flow cytometry samples requiring anticoagulation, balancing anticoagulant stability, cellular dispersion, and consistency of flow cytometric analysis
C767441	UltraBio™ tissue/cell storage solution	—	Suitable for low-temperature preservation of tissue-derived cells and routine cell samples and for protection before recovery, reducing structural damage during freeze-thaw processes
Q1492042	Rapid Cell Freezing Medium (Serum-Free)	sterile-filtered, BioReagent, endotoxin tested, ready-to-use, for cell culture	Suitable for cell cryopreservation requiring rapid handling and standardized preservation workflows and is appropriate for sample systems demanding high batch consistency
Q1492041	Rapid Cell Freezing Medium (Serum-Free)	sterile-filtered, BioReagent, endotoxin tested, ready-to-use, for cell culture	Suitable for serum-free cryopreservation of routine cell samples, reducing the impact of serum variability on post-thaw status
P1373570	Serum/Protein-Free Cell Freezing Medium	sterile-filtered, BioReagent, endotoxin tested, ready-to-use, for cell culture, sterile	Suitable for cryopreservation of immune cells, balancing post-thaw viability, dispersion, and stability in downstream functional assays
P778221	Serum/Protein-Free Cell Freezing Medium	sterile-filtered, BioReagent, endotoxin tested, ready-to-use, for cell culture, sterile	Suitable for stem cell cryopreservation, emphasizing low-damage preservation of fragile cell populations and compatibility with post-thaw recovery
C301868	Cell Freezing Medium	1×,sterile,Basic Tier	Suitable for basic cryopreservation of routine cell samples and serves as a basic preservation system in general laboratories
Q1374083	Cell Freezing Medium（Serum-free, DMSO-free）	BioReagent, endotoxin tested, for cell culture, sterile	Suitable for preservation of cell samples sensitive to DMSO or exogenous proteins, helping reduce interference in certain systems
C1491281	Cell Freezing Medium (with Serum)	sterile-filtered, BioReagent, endotoxin tested, ready-to-use, for cell culture	Suitable for cryopreservation of routine cell lines and some primary cells, with emphasis on post-thaw viability and membrane stability
A1509562	ACK Lysis Buffer	BioReagent	Suitable for preprocessing of samples containing red blood cell background, removing erythrocyte interference and improving analytical quality for leukocytes or other cell populations
G1509564	Gey's Red Blood Cell Lysis Buffer (Gey's Lysis Buffer)	BioReagent	Suitable for removal of erythrocytes before cell analysis and for samples requiring improved morphological background and clearer population discrimination
T1509568	Tris-Ammonium Chloride Red Blood Cell Lysis Buffer (Sterile)	sterile-filtered,BioReagent,sterile	Suitable for erythrocyte lysis during preprocessing before flow cytometry or cell isolation, reducing interference from background cells and debris
A1372415	Red Blood Cell Lysis Buffer	BioReagent, sterile-filtered, for cell culture, 10×	Suitable for removing erythrocyte background during cell sample preprocessing, improving the quality of subsequent counting, flow cytometry, and microscopic observation
P743267	PBS, DNase&RNase Free	sterile-filtered, BioReagent, DNase, RNase free, ready-to-use, for cell culture, 1×	Suitable for short-term washing, resuspension, and low-background maintenance of cell samples, especially for preprocessing scenarios sensitive to nuclease contamination
T494526	PhosphateBuffered Saline（PBS）1X concentrate	1X,sterile,pH7.2-7.4	Suitable for short-term resuspension, washing, and maintenance of a basic isotonic environment for cell samples and can be used as a preprocessing or pre-analysis buffer

 

The choice of a cell sample preservation system directly determines the credibility of morphological integrity, anticoagulant stability, and interpretation of analytical results. A more appropriate strategy is not to pursue stronger anticoagulation or longer storage time in isolation, but rather to match structural stability, functional preservation, and pre-analytical consistency according to the analytical objective. For cell samples, the preservation system itself is part of the analytical method.

 

For more related articles, please see below:

[1] Stem Cell Preservation and Resuscitation