scholarly journals Heterogeneous Red Blood Cell Adhesion and Deformability in Sickle Cell Disease

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
Yunus Alapan ◽  
Jane A. Little ◽  
Umut A. Gurkan
Keyword(s):  
Cell Adhesion ◽  
Sickle Cell Disease ◽  
Blood Cell ◽  
Sickle Cell ◽  
Red Blood Cell ◽  
Cell Disease

scholarly journals Whole blood viscosity and red blood cell adhesion: Potential biomarkers for targeted and curative therapies in sickle cell disease

2020 ◽  
Vol 95 (11) ◽  
pp. 1246-1256 ◽  
Author(s):  
Erdem Kucukal ◽  
Yuncheng Man ◽  
Ailis Hill ◽  
Shichen Liu ◽  
Allison Bode ◽  
...  
Keyword(s):  
Cell Adhesion ◽  
Sickle Cell Disease ◽  
Blood Cell ◽  
Sickle Cell ◽  
Red Blood Cell ◽  
Blood Viscosity ◽  
Whole Blood ◽  
Cell Disease ◽  
Whole Blood Viscosity ◽  
Potential Biomarkers

scholarly journals Decreased sickle red blood cell adhesion to laminin by hydroxyurea is associated with inhibition of Lu/BCAM protein phosphorylation

Blood ◽  
2010 ◽  
Vol 116 (12) ◽  
pp. 2152-2159 ◽  
Author(s):  
Pablo Bartolucci ◽  
Vicky Chaar ◽  
Julien Picot ◽  
Dora Bachir ◽  
Anoosha Habibi ◽  
...  
Keyword(s):  
Cell Adhesion ◽  
Sickle Cell Disease ◽  
Blood Cell ◽  
Adhesion Molecules ◽  
Sickle Cell ◽  
Red Blood Cell ◽  
Cyclic Adenosine Monophosphate ◽  
Adenosine Monophosphate ◽  
Cell Disease ◽  
Hydroxyurea Treatment

Abstract Sickle cell disease is characterized by painful vaso-occlusive crises during which abnormal interactions between erythroid adhesion molecules and vessel-wall proteins are thought to play a critical role. Hydroxyurea, the only drug with proven benefit in sickle cell disease, diminishes these interactions, but its mechanism of action is not fully understood. We report that, under hydroxyurea, expression of the unique erythroid laminin receptor Lu/BCAM was increased, but red blood cell adhesion to laminin decreased. Because Lu/BCAM phosphorylation is known to activate cell adhesion to laminin, it was evaluated and found to be dramatically lower in hydroxyurea-treated patients. Analysis of the protein kinase A pathway showed decreased intracellular levels of the upstream effector cyclic adenosine monophosphate during hydroxyurea treatment. Using a cellular model expressing recombinant Lu/BCAM, we showed that hydroxyurea led to decreased intracellular cyclic adenosine monophosphate levels and diminished Lu/BCAM phosphorylation and cell adhesion. We provide evidence that hydroxyurea could reduce abnormal sickle red blood cell adhesion to the vascular wall by regulating the activation state of adhesion molecules independently of their expression level.

scholarly journals Red Blood Cell Adhesion in Adult Patients with Sickle Cell Disease, at Baseline and with Pain, Measured on SCD Biochip Microfluidic Assay

Blood ◽  
2018 ◽  
Vol 132 (Supplement 1) ◽  
pp. 2386-2386
Author(s):  
Alexandra Boye-Doe ◽  
Jane Little
Keyword(s):  
Cell Adhesion ◽  
Sickle Cell Disease ◽  
Blood Cell ◽  
Sickle Cell ◽  
Red Blood Cell ◽  
Research Funding ◽  
Adult Patients ◽  
Cell Disease ◽  
University Hospitals ◽  
Western Reserve

Abstract Red Blood Cell Adhesion in Adult Patients with Sickle Cell Disease, at Baseline and with Pain, Measured on SCD Biochip Microfluidic Assay Alexandra Boye-Doe1, Erina Quinn1, Charlotte Yuan1, Umut A. Gurkan, PhD1, and Jane A. Little, MD2 1Case Western Reserve University, Cleveland, OH; 2Division of Hematology/Oncology, Case Western Reserve University/ University Hospitals Seidman Cancer Center, Cleveland, OH Background: Despite being monogenic, sickle cell disease (SCD) has a variable phenotype, in which clinical complications and manifestations evolve as patients age. In children, pain generally resolves between crises, whereas adults may experience acute, chronic, or acute-on-chronic pain. We have taken a multifaceted approach to characterize adhesion and inflammation during self-identified pain episodes in adults with SCD in order to better understand pain syndromes in adults and the potential for more specifically targeted therapies. In this pilot study, we assessed changes in red blood cell (RBC) adhesion to the subendothelial protein laminin (LN) during crisis in adults with SCD self-reporting for pain crisis on whom we had baseline adhesion data from a routine clinic visit. Methods: Surplus blood from patients' routine bloodwork was used. Crisis samples were collected from patients at the Acute Care Clinic or Emergency Department at University Hospitals Cleveland Medical Center (UHCMC) when patients presented for management of pain. Baseline samples were collected during routine visits to the Sickle Cell Clinic. This study was approved by the IRB at UHCMC. Within a 24-hour period, RBC adhesion to LN was quantitated by microscopy after passage of unprocessed whole blood through a LN-coated microfluidic adhesion assay, the SCD biochip [1]. Samples were analyzed for hemoglobin (Hb) phenotype by high-performance liquid chromatography (HPLC) in the clinical lab. Correlative clinical data, including, baseline lab values, and medical history, were obtained from the patients' medical records and used to characterize our results. Data from people with multiple samples were used as median values. Results: Blood samples from 19 unselected patients with sickle cell hemoglobin SS (HbSS) were obtained at crisis, and compared with baseline samples obtained from 2014 to 2018 (n = 67 samples). 2 groups were identified: Group 1 with increased adhesion (>25% rise from baseline, n= 10) during crisis, and Group 2 with decreased adhesion (>25% fall from baseline, n=8) or no change (<25% change) (n=1) during crisis (Fig. 1). Time between a patient's initial crisis event and when they presented for pain management varied, possibly affecting observed adhesion. Nonetheless, patients showing an increased adhesion in crisis also showed a decrease in Hb (p = 0.039) between their baseline analyses and the crisis visit. A decrease in Hb may associate with increased adhesion, if the latter contributes to crisis-related hemolysis. However, other markers of hemolysis did not change. By contrast, patients with decreasing RBC adhesion showed a decrease in absolute reticulocyte count (ARC, p = 0.019) at their crisis visit. Statistical analysis of HbS, HbA, and HbF levels n = 64 showed no significant change between baseline or crises. Discussion: A decrease in adhesion during crisis may reflect the presence of sickled RBCs that adhere preferentially to other basement membrane proteins such as fibronectin or thrombospondin. In addition, inflammatory white blood cell adhesion, possibly central to vaso-occlusion, is not evaluated in this study. We are currently examining cytokine and monocyte profiles from people with SCD presenting for management of pain, so that we may better understand inflammatory mediators of pain. Our data are the first to try to understand RBC adhesion in people with SCD who present for management of pain, whether this as an isolated or common event for that person. We found that unselected adults with SCD who presented for management of pain had heterogeneous changes in RBC adhesion, which may reflect differences in underlying mechanism. The pathophysiologic heterogeneity of pain in adults with SCD will be important to understand as anti-adhesion therapies are being developed and adopted clinically. Disclosures Little: Doris Duke Charitable Foundations: Research Funding; NHLBI: Research Funding; Hemex: Patents & Royalties: Patent, no honoraria; PCORI: Research Funding.

scholarly journals Sickle cell disease biochip: a functional red blood cell adhesion assay for monitoring sickle cell disease

2016 ◽  
Vol 173 ◽  
pp. 74-91.e8 ◽  
Author(s):  
Yunus Alapan ◽  
Ceonne Kim ◽  
Anima Adhikari ◽  
Kayla E. Gray ◽  
Evren Gurkan-Cavusoglu ◽  
...  
Keyword(s):  
Cell Adhesion ◽  
Sickle Cell Disease ◽  
Blood Cell ◽  
Sickle Cell ◽  
Red Blood Cell ◽  
Adhesion Assay ◽  
Cell Disease ◽  
Cell Adhesion Assay

scholarly journals Red blood cell adhesion to heme-activated endothelial cells reflects clinical phenotype in sickle cell disease

2018 ◽  
Vol 93 (8) ◽  
pp. 1050-1060 ◽  
Author(s):  
Erdem Kucukal ◽  
Anton Ilich ◽  
Nigel S. Key ◽  
Jane A. Little ◽  
Umut A. Gurkan
Keyword(s):  
Endothelial Cells ◽  
Cell Adhesion ◽  
Sickle Cell Disease ◽  
Blood Cell ◽  
Sickle Cell ◽  
Red Blood Cell ◽  
Clinical Phenotype ◽  
Cell Disease

scholarly journals Effects of Genotypes and Treatment on Oxygenscan Parameters in Sickle Cell Disease

Cells ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 811
Author(s):  
Camille Boisson ◽  
Minke A. E. Rab ◽  
Elie Nader ◽  
Céline Renoux ◽  
Celeste Kanne ◽  
...  
Keyword(s):  
Steady State ◽  
Sickle Cell Disease ◽  
Blood Cell ◽  
Sickle Cell ◽  
Red Blood Cell ◽  
Cell Disease ◽  
Oxygen Gradient ◽  
Acute Complication ◽  
Adults And Children ◽  
The Difference

(1) Background: The aim of the present study was to compare oxygen gradient ektacytometry parameters between sickle cell patients of different genotypes (SS, SC, and S/β+) or under different treatments (hydroxyurea or chronic red blood cell exchange). (2) Methods: Oxygen gradient ektacytometry was performed in 167 adults and children at steady state. In addition, five SS patients had oxygenscan measurements at steady state and during an acute complication requiring hospitalization. (3) Results: Red blood cell (RBC) deformability upon deoxygenation (EImin) and in normoxia (EImax) was increased, and the susceptibility of RBC to sickle upon deoxygenation was decreased in SC patients when compared to untreated SS patients older than 5 years old. SS patients under chronic red blood cell exchange had higher EImin and EImax and lower susceptibility of RBC to sickle upon deoxygenation compared to untreated SS patients, SS patients younger than 5 years old, and hydroxyurea-treated SS and SC patients. The susceptibility of RBC to sickle upon deoxygenation was increased in the five SS patients during acute complication compared to steady state, although the difference between steady state and acute complication was variable from one patient to another. (4) Conclusions: The present study demonstrates that oxygen gradient ektacytometry parameters are affected by sickle cell disease (SCD) genotype and treatment.

Microfluidic electrical impedance assessment of red blood cell mediated microvascular occlusion

Lab on a Chip ◽  
2021 ◽  
Author(s):  
Yuncheng Man ◽  
Debnath Maji ◽  
Ran An ◽  
Sanjay Ahuja ◽  
Jane A Little ◽  
...  
Keyword(s):  
Sickle Cell Disease ◽  
Blood Cell ◽  
Red Blood Cells ◽  
Sickle Cell ◽  
Red Blood Cell ◽  
Blood Cells ◽  
Electrical Impedance ◽  
Cell Disease ◽  
Blood Disorders

Alterations in the deformability of red blood cells (RBCs), occurring in hemolytic blood disorders such as sickle cell disease (SCD), contributes to vaso-occlusion and disease pathophysiology. However, there are few...

Red Blood Cell Folate and Serum Vitamin B12 Status in Children With Sickle Cell Disease

2001 ◽  
Vol 23 (3) ◽  
pp. 165-169 ◽  
Author(s):  
Tay S. Kennedy ◽  
Ellen B. Fung ◽  
Deborah A. Kawchak ◽  
Babette S. Zemel ◽  
Kwaku Ohene-Frempong ◽  
...  
Keyword(s):  
Sickle Cell Disease ◽  
Blood Cell ◽  
Vitamin B12 ◽  
Sickle Cell ◽  
Red Blood Cell ◽  
Serum Vitamin ◽  
Cell Disease
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