







































Emmanuel Ifeanyi Obeagu                                                                                                           Asian Journal of Dental and Health Sciences. 2025; 5(3):1-5 

[1]                                                                                                                                                                                                                                              AJDHS.COM 

 

 

Available online at ajdhs.com 

Asian Journal of Dental and Health Sciences 
Open Access to Dental and Medical Research 

Copyright  © 2025 The  Author(s): This is an open-access article distributed under the terms of the CC BY-NC 4.0 
which permits unrestricted use, distribution, and reproduction in any medium for non-commercial use provided the 

original author and source are credited  

 

 

Nitrogen Balance and Its Impact on Hematological Function in Sickle Cell 
Patients: A Review 

* Emmanuel Ifeanyi Obeagu  

Department of Biomedical and Laboratory Science, Africa University, Zimbabwe. 

Article Info: 
_____________________________________________ 
Article History: 

Received   09 May 2025     
Reviewed  02 June 2025 
Accepted   18 June 2025 
Published 15 Sep 2025 

_____________________________________________ 
Cite this article as:  

Obeagu EI, Nitrogen Balance and Its Impact 
on Hematological Function in Sickle Cell 
Patients: A Review, Asian Journal of Dental 
and Health Sciences. 2025; 5(3):1-5                                                                     

DOI: http://dx.doi.org/10.22270/ajdhs.v5i3.128             

Abstract 
_________________________________________________________________________________________________________________ 

Sickle cell disease (SCD) is a chronic genetic disorder marked by recurrent hemolysis, anemia, and 
vaso-occlusive events, all of which significantly elevate the body's metabolic and nutritional 
demands. Among the critical nutritional parameters, nitrogen balance—reflecting the equilibrium 
between nitrogen intake and excretion—emerges as a key indicator of protein metabolism and 
tissue maintenance. Patients with SCD often face challenges in maintaining adequate nitrogen 
balance due to chronic inflammation, increased erythropoietic drive, and elevated protein turnover, 
particularly during disease exacerbations or infections. Negative nitrogen balance in SCD is 
associated with several hematological complications, including impaired hemoglobin synthesis, 
decreased red blood cell production, and weakened immune defense. The continuous need for red 
blood cell replacement due to chronic hemolysis further amplifies the demand for amino acids, 
making protein sufficiency essential for effective hematopoiesis. Furthermore, nitrogen depletion 
can worsen the overall clinical picture by contributing to growth delays in children, reduced physical 
endurance, and increased frequency of hospital admissions. 

Keywords: Nitrogen balance, hematological function, sickle cell disease, protein metabolism, anemia 

*Address for Correspondence:   

E Emmanuel Ifeanyi Obeagu, Department of Biomedical and Laboratory Science, Africa University, Zimbabwe 

 

Introduction 

Sickle cell disease (SCD) is an inherited 
hemoglobinopathy characterized by the presence of 
sickle-shaped erythrocytes due to a mutation in the β-
globin gene, resulting in the production of abnormal 
hemoglobin S (HbS). This structural abnormality leads 
to red blood cell deformation under deoxygenated 
conditions, causing vaso-occlusion, chronic hemolytic 
anemia, and multi-organ complications. SCD 
predominantly affects individuals of African, Middle 
Eastern, and Mediterranean descent, and despite 
advances in treatment, it remains a major contributor to 
morbidity and mortality in affected populations. 
Nutritional deficiencies, though often under-recognized, 
significantly impact the clinical course of SCD 1-6. One of 
the less explored but highly relevant aspects of 
nutritional status in SCD is nitrogen balance. Nitrogen, a 
fundamental component of amino acids and nucleotides, 
is vital for cellular function, growth, and repair. Nitrogen 
balance refers to the net difference between nitrogen 
intake—primarily through dietary protein—and 
nitrogen loss via urine, feces, sweat, and other bodily 
excretions. A positive nitrogen balance is indicative of 
anabolic states such as growth, recovery, or pregnancy, 
whereas a negative nitrogen balance denotes catabolism 
and potential physiological deterioration 7-8. 

Patients with SCD are particularly susceptible to a 
negative nitrogen balance due to several interrelated 
factors. Chronic hemolysis increases the demand for 
erythropoiesis, which in turn escalates the requirement 
for amino acids and other nutrients necessary for red 
blood cell synthesis. Additionally, recurring infections, 
systemic inflammation, oxidative stress, and frequent 
hospitalizations contribute to hypermetabolism and 
increased protein turnover. These factors collectively 
shift the metabolic equilibrium toward a catabolic state, 
exacerbating nitrogen loss and depleting protein 
reserves critical for hematological function 9-11. The 
implications of a disrupted nitrogen balance in SCD 
extend beyond basic nutrition. Inadequate protein 
availability may hinder the synthesis of hemoglobin, 
reduce erythrocyte lifespan, and impair bone marrow 
function. This can lead to worsened anemia, decreased 
immune response, and slower recovery from vaso-
occlusive crises or other complications. Moreover, in 
pediatric populations, persistent nitrogen imbalance is 
associated with growth retardation, delayed sexual 
maturation, and poor neurocognitive development, 
further underscoring the systemic consequences of poor 
nitrogen homeostasis 12-15. 

 

 

                     Open Access                                                                                                                                                                                                                Review Article                                                                           

http://jddtonline.info/
http://dx.doi.org/10.22270/ajdhs.v5i3.128
https://crossmark.crossref.org/dialog/?doi=10.22270/ajdhs.v5i3.128&amp;domain=pdf
https://orcid.org/0000-0002-4538-0161


Emmanuel Ifeanyi Obeagu                                                                                                           Asian Journal of Dental and Health Sciences. 2025; 5(3):1-5 

[2]                                                                                                                                                                                                                                              AJDHS.COM 

Understanding Nitrogen Balance 

Nitrogen balance is a fundamental concept in clinical 
nutrition and physiology, serving as a marker of protein 
metabolism and overall nutritional status. It represents 
the equilibrium between nitrogen intake—largely 
derived from dietary proteins—and nitrogen excretion, 
which occurs primarily through urine in the form of 
urea, but also through feces, sweat, skin desquamation, 
and other minor losses. A positive nitrogen balance 
indicates an anabolic state, where nitrogen intake 
exceeds loss, supporting growth, tissue repair, and 
recovery. In contrast, a negative nitrogen balance 
suggests a catabolic state, where nitrogen losses exceed 
intake, reflecting protein degradation and inadequate 
nutritional support 16. In healthy individuals, nitrogen 
balance fluctuates depending on physiological demands 
such as growth (e.g., childhood, adolescence), 
pregnancy, illness, or post-surgical recovery. The body 
requires a constant supply of amino acids not only for 
structural proteins but also for enzymes, hormones, 
immunoglobulins, and hemoglobin. When dietary 
protein intake is insufficient or when metabolic 
demands are increased—as seen in chronic diseases like 
sickle cell disease—the body begins to catabolize its 
own proteins, leading to muscle wasting, 
immunosuppression, and impaired erythropoiesis 17. 

Measurement of nitrogen balance is typically performed 
through dietary assessment and analysis of nitrogen 
excretion, most commonly via 24-hour urinary urea 
nitrogen (UUN). The calculation takes into account 
estimated non-urinary nitrogen losses and helps 
clinicians evaluate whether a patient is receiving 
adequate protein. However, in settings like SCD, where 
inflammation and oxidative stress alter metabolism, 
interpreting nitrogen balance becomes more complex. It 
is crucial to consider the disease-specific context, as SCD 
patients may exhibit elevated basal metabolic rates and 
protein turnover even in clinically stable states, thereby 
necessitating higher protein intake to achieve nitrogen 
equilibrium 18. In SCD, maintaining nitrogen balance is 
particularly challenging due to persistent hemolysis, 
increased erythropoietic activity, and frequent 
inflammatory episodes. Each of these processes imposes 
a substantial demand on amino acid pools, making 
protein sufficiency a prerequisite for adequate 
hematological function. Furthermore, nitrogen balance 
is intimately linked to overall clinical outcomes in SCD—
negative nitrogen states are associated with increased 
fatigue, reduced hemoglobin levels, higher susceptibility 
to infections, and longer recovery periods from vaso-
occlusive crises 18. 

Nitrogen Metabolism in Sickle Cell Disease 

Nitrogen metabolism plays a pivotal role in maintaining 
physiological homeostasis, particularly in conditions 
marked by chronic inflammation, increased cellular 
turnover, and heightened metabolic demand—
hallmarks of sickle cell disease (SCD). In individuals 
with SCD, the pathophysiology of the disease imposes a 
substantial burden on protein metabolism due to the 
continuous need for erythrocyte regeneration, tissue 
repair, and immune function support. These processes 

necessitate a constant and elevated supply of amino 
acids, making nitrogen metabolism a critical 
determinant of health outcomes in this population 19-20. 
One of the primary contributors to altered nitrogen 
metabolism in SCD is the state of chronic hemolysis. 
Hemolysis not only leads to anemia and reduced 
oxygen-carrying capacity but also accelerates the 
turnover of erythrocytes, thereby increasing the 
demand for protein synthesis to replenish red blood 
cells. This continuous erythropoietic drive consumes 
large amounts of nitrogen in the form of amino acids 
necessary for hemoglobin and cellular component 
production. Inadequate dietary protein or inefficient 
utilization of nitrogen can thus lead to a deficit, resulting 
in negative nitrogen balance and its attendant 
complications 21. 

In addition to hemolysis, recurrent infections and vaso-
occlusive crises in SCD further compound nitrogen 
losses through systemic inflammation and catabolic 
stress. During these episodes, pro-inflammatory 
cytokines such as interleukin-6 (IL-6) and tumor 
necrosis factor-alpha (TNF-α) stimulate protein 
breakdown in muscle tissue, divert amino acids away 
from constructive processes like hematopoiesis, and 
increase urinary nitrogen excretion. Fever, tissue 
damage, and organ dysfunction may also impair 
nutrient absorption and utilization, making it more 
difficult to maintain a favorable nitrogen status 22-23. The 
metabolic adaptations observed in SCD, including 
elevated resting energy expenditure and increased 
protein turnover, also affect nitrogen utilization. Several 
studies have documented higher caloric and protein 
needs in children and adults with SCD compared to 
healthy controls, even during periods of clinical 
stability. However, standard nutritional guidelines often 
fail to reflect these heightened requirements, leading to 
chronic undernutrition and suboptimal nitrogen 
retention. This discrepancy contributes to poor growth, 
delayed puberty, and reduced resilience against 
oxidative and infectious insults 24-25 From a biochemical 
perspective, disruptions in nitrogen metabolism in SCD 
also affect other physiological systems, including the 
urea cycle, amino acid synthesis, and nitric oxide (NO) 
production. Arginine, a semi-essential amino acid and a 
key component of nitrogen metabolism, is often 
depleted in SCD due to increased consumption in 
hemolysis and inflammation. Arginine deficiency can 
impair NO synthesis, contributing to endothelial 
dysfunction and worsening vaso-occlusive phenomena. 
These intricate interplays highlight how nitrogen 
metabolism extends beyond nutritional status, directly 
influencing vascular tone and hematologic stability in 
SCD 26. 

Hematological Implications of Nitrogen 
Imbalance 

Nitrogen imbalance in individuals with sickle cell 
disease (SCD) is not merely a nutritional concern; it has 
direct and far-reaching hematological implications. The 
continuous loss of nitrogen, when not matched by 
adequate dietary intake, disrupts protein homeostasis 
and undermines essential physiological processes 



Emmanuel Ifeanyi Obeagu                                                                                                           Asian Journal of Dental and Health Sciences. 2025; 5(3):1-5 

[3]                                                                                                                                                                                                                                              AJDHS.COM 

involved in hematopoiesis. This imbalance contributes 
significantly to the severity of anemia, immune 
dysfunction, and delayed recovery from hematologic 
insults commonly encountered in SCD 20. Hemoglobin 
synthesis is one of the most nitrogen-intensive 
biological processes. In SCD, where erythrocyte lifespan 
is significantly shortened due to chronic hemolysis, the 
bone marrow is under constant pressure to replenish 
red blood cells. A negative nitrogen balance 
compromises the availability of amino acids—
particularly those required for globin chain synthesis—
thus limiting the capacity of the bone marrow to 
produce functional erythrocytes. The result is persistent 
or worsening anemia, even in the absence of overt 
clinical crises. Inadequate protein status may also 
impair the responsiveness to erythropoietin, further 
blunting effective erythropoiesis 21. Moreover, nitrogen 
imbalance adversely affects leukocyte function and 
immune surveillance. Immune cells, particularly 
lymphocytes and neutrophils, require adequate protein 
substrates to support proliferation, antibody 
production, cytokine synthesis, and cytotoxic activity. In 
SCD, where individuals already face increased 
susceptibility to infections due to functional asplenia 
and chronic inflammation, suboptimal nitrogen status 
can exacerbate immunodeficiency. This predisposes 
patients to more frequent and severe infections, leading 
to increased hospitalizations and prolonged disease 
flares 22. 

Platelet function and coagulation dynamics may also be 
influenced by protein and nitrogen deficiencies. 
Platelets rely on structural proteins and enzymatic 
systems that are nitrogen-dependent. A compromised 
nitrogen pool may impair platelet aggregation and 
contribute to the dysregulation of the coagulation 
cascade—factors that play a role in the pathogenesis of 
vaso-occlusive crises. Additionally, the repair of 
endothelial damage, a key process in preserving 
vascular integrity in SCD, requires sufficient amino acids 
for collagen formation and other reparative mechanisms 
23. Nitrogen imbalance may also influence the redox 
status of sickle cell patients. Antioxidant enzymes such 
as glutathione peroxidase, superoxide dismutase, and 
catalase are protein-based and require nitrogen for 
their synthesis. In a state of nitrogen deficiency, the 
capacity to synthesize these protective enzymes may be 
diminished, leading to oxidative stress—a known 
aggravator of erythrocyte sickling and hemolysis. This 
creates a vicious cycle in which nitrogen imbalance 
worsens oxidative damage, which in turn accelerates 
hemolysis and protein turnover 24. In pediatric SCD 
patients, nitrogen imbalance has been linked with 
impaired growth and delayed developmental 
milestones. These hematological and systemic 
deficiencies not only reflect poor protein-nutritional 
status but also impact the long-term prognosis of 
affected children. Poor hemoglobin levels, immune 
suppression, and slowed somatic growth cumulatively 
reduce quality of life and functional capacity, 
emphasizing the clinical urgency of addressing nitrogen 
balance 25-26. 

 

Clinical and Nutritional Interventions 

Effective management of nitrogen imbalance in sickle 
cell disease (SCD) necessitates a multifaceted approach 
that integrates clinical care with targeted nutritional 
strategies. Due to the chronic catabolic state and 
elevated protein turnover associated with SCD, 
particularly during vaso-occlusive crises or infections, 
conventional nutritional recommendations often fall 
short of meeting the metabolic demands of these 
patients. Clinical and dietary interventions must 
therefore be proactive, personalized, and based on a 
comprehensive understanding of individual needs [27-
29]. Clinically, routine assessment of nutritional status 
should be incorporated into standard care for SCD 
patients, including regular evaluations of serum protein 
levels, body mass index (BMI), and markers of nitrogen 
excretion, such as urinary urea nitrogen. Where feasible, 
indirect calorimetry and nitrogen balance studies may 
provide more accurate estimates of metabolic demand. 
In patients with evidence of nitrogen deficit, medical 
nutrition therapy should be initiated under the guidance 
of dietitians experienced in hematologic and metabolic 
disorders [30-32]. From a nutritional standpoint, 
increasing dietary protein intake is the cornerstone of 
restoring nitrogen balance. The recommended daily 
allowance (RDA) for protein may need to be 
significantly increased in SCD patients, particularly 
during periods of increased stress or recovery. High-
biological-value proteins—such as those from eggs, 
dairy, lean meats, fish, and legumes—should be 
prioritized to ensure the supply of essential amino acids. 
Supplemental formulations containing branched-chain 
amino acids (BCAAs), glutamine, and arginine have also 
been studied for their role in promoting nitrogen 
retention and tissue repair, with promising but still 
emerging evidence 33-34. 

Micronutrient support plays a complementary role. 
Zinc, folate, and vitamin B12 are crucial for DNA 
synthesis, erythropoiesis, and immune function, all of 
which are nitrogen-dependent processes. Ensuring 
adequate intake of these nutrients can enhance the 
effectiveness of protein utilization and support 
hematopoietic function. Additionally, antioxidants such 
as vitamins C and E may reduce oxidative stress, 
indirectly lowering protein degradation and conserving 
nitrogen stores 35. In severe or complicated cases—such 
as hospitalized patients with poor oral intake, 
malabsorption, or increased metabolic demands—
enteral or parenteral nutrition may be required. These 
interventions must be carefully monitored to avoid 
complications such as refeeding syndrome or fluid 
overload. The choice of protein sources, the timing of 
delivery, and the balance of macronutrients should be 
tailored to the patient's clinical condition and recovery 
goals 36. Importantly, education and counseling for 
patients and caregivers are vital components of any 
nutritional intervention. Empowering individuals with 
SCD and their families to understand the importance of 
dietary protein, hydration, and nutrient diversity can 
lead to better compliance and long-term improvements 
in health outcomes. Community-based programs and 
school feeding initiatives may also play a role in 



Emmanuel Ifeanyi Obeagu                                                                                                           Asian Journal of Dental and Health Sciences. 2025; 5(3):1-5 

[4]                                                                                                                                                                                                                                              AJDHS.COM 

supporting nutritional sufficiency, particularly in low-
resource settings where SCD is prevalent 37. 

Conclusion 

Nitrogen balance is a fundamental determinant of 
hematological stability and overall health in individuals 
with sickle cell disease (SCD). The chronic metabolic 
demands imposed by hemolysis, inflammation, and 
tissue repair processes render patients particularly 
vulnerable to nitrogen deficits. When unaddressed, 
nitrogen imbalance exacerbates anemia, impairs 
immune function, delays growth and development, and 
diminishes the body's capacity to withstand oxidative 
and infectious stressors. These consequences 
underscore the importance of integrating nitrogen 
balance assessment and management into the 
comprehensive care of SCD patients. Nutritional 
strategies, including increased protein intake, targeted 
amino acid supplementation, and micronutrient 
support, can effectively restore nitrogen equilibrium 
and enhance clinical outcomes. Additionally, proactive 
clinical monitoring and individualized dietary planning 
are essential to ensure that metabolic demands are met 
across the disease spectrum—from childhood through 
adulthood, and during both steady-state and crisis 
periods. 

Conflict of Interest: Author declares no potential 

conflict of interest with respect to the contents, 

authorship, and/or publication of this article. 

Source of Support: Nil 

Funding: The authors declared that this study has 

received no financial support. 

Informed Consent Statement: Not applicable.  

Data Availability Statement: The data supporting in 

this paper are available in the cited references.  

Ethics approval: Not applicable. 

References 

1. Gupta A. Sickle Cell Anemia and Related Hemoglobinopathies. 
InDecision Making Through Problem Based Learning in 
Hematology: A Step-by-Step Approach in patients with Anemia 
2024: 269-289. Singapore: Springer Nature Singapore. 
https://doi.org/10.1007/978-981-99-8933-1_21 

2. Hassan MS, Nasrin T, Mahalka A, Hoque M, Ali S. A perspective on 
the genesis, diagnostics, and management of sickle cell disease. 
Egyptian Journal of Medical Human Genetics. 2024; 25(1):150. 
https://doi.org/10.1186/s43042-024-00623-1 

3. Rajput HS, Kumari M, Talele C, Sajan C, Saggu V, Hadia R. 
Comprehensive Overview Of Sickle Cell Disease: Global Impact, 
Management Strategies, And Future Directions. Journal of 
Advanced Zoology. 2024; 45(1). 
https://doi.org/10.53555/jaz.v45i1.3390 

4. Obeagu EI. Role of Autophagy in Modulating Oxidative Stress in 
Sickle Cell Disease: A Narrative Review. Int. J. Curr. Res. Chem. 
Pharm. Sci. 2024;11(8):38-46. https://doi.org/10.23880/hij-
16000247 

5. Obeagu EI. Redox Regulation of Hemoglobin in Sickle Cell Disease: A 
Review. Int. J. Curr. Res. Chem. Pharm. Sci. 2024;11(8):13-9. 

6. Obeagu EI, Bunu UO, Obeagu GU, Habimana JB. Antioxidants in the 
management of sickle cell anaemia: an area to be exploited for the 

wellbeing of the patients. Int Res Med Health Sci. 2023 Sep 
11;6:12-7. 

7. Xiao R, Li L, Zhang Y, Fang L, Li R, Song D, Liang T, Su X. Reducing 
carbon and nitrogen loss by shortening the composting duration 
based on seed germination index (SCD@ GI): feasibilities and 
challenges. Science of The Total Environment. 2024:172883. 
https://doi.org/10.1016/j.scitotenv.2024.172883 
PMid:38697528 

8. Lin W, Lv X, Wang Q, Li L, Zou G. Nitrogen concentration dependent 
optical defects transition in single crystal diamond through low 
pressure high temperature annealing. Vacuum. 2025:114329. 
https://doi.org/10.1016/j.vacuum.2025.114329 

9. Wood KC, Granger DN. Sickle cell disease: role of reactive oxygen 
and nitrogen metabolites. Clinical & Experimental Pharmacology 
& Physiology. 2007 Sep 1;34(9). https://doi.org/10.1111/j.1440-
1681.2007.04639.x PMid:17645642 

10. Dijkmans T, Djokic MR, Van Geem KM, Marin GB. Comprehensive 
compositional analysis of sulfur and nitrogen containing 
compounds in shale oil using GC× GC-FID/SCD/NCD/TOF-MS. 
Fuel. 2015; 140:398-406. 
https://doi.org/10.1016/j.fuel.2014.09.055 

11. Muehle M, Asmussen J, Becker MF, Schuelke T. Extending 
microwave plasma assisted CVD SCD growth to pressures of 400 
Torr. Diamond and Related Materials. 2017; 79:150-163. 
https://doi.org/10.1016/j.diamond.2017.09.013 

12. Obeagu EI, Obeagu GU. Immunization strategies for individuals 
with sickle cell anemia: A narrative review. Medicine. 2024; 
103(38):e39756. 
https://doi.org/10.1097/MD.0000000000039756 
PMid:39312357 PMCid:PMC11419550 

13. Obeagu EI. Strategies for reducing child mortality due to sickle cell 
disease in Uganda: a narrative review. Annals of Medicine and 
Surgery.:10-97. 

14. Obeagu EI. Erythropoeitin in sickle cell anaemia: a review. 
International Journal of Research Studies in Medical and Health 
Sciences. 2020;5(2):22-8. 
https://doi.org/10.22259/ijrsmhs.0502004 

15. Obeagu EI, Obeagu GU. Malnutrition in sickle cell anemia: 
prevalence, impact, and interventions: a review. Medicine. 2024 
May 17;103(20):e38164. 
https://doi.org/10.1097/MD.0000000000038164 
PMid:38758879 PMCid:PMC11098235 

16. Quemada M, Delgado A, Mateos L, Villalobos FJ. Nitrogen 
fertilization I: The nitrogen balance. InPrinciples of agronomy for 
sustainable agriculture 2024: 377-401. Cham: Springer 
International Publishing. https://doi.org/10.1007/978-3-031-
69150-8_26 

17. Krug EC, Winstanley D. The need for comprehensive and 
consistent treatment of the nitrogen cycle in nitrogen cycling and 
mass balance studies: I. Terrestrial nitrogen cycle. Science of the 
total environment. 2002; 293(1-3):1-29. 
https://doi.org/10.1016/S0048-9697(01)01133-0 
PMid:12109464 

18. Zhang CC, Zhou CZ, Burnap RL, Peng L. Carbon/nitrogen metabolic 
balance: lessons from cyanobacteria. Trends in plant science. 
2018; 23(12):1116-1130. 
https://doi.org/10.1016/j.tplants.2018.09.008 PMid:30292707 

19. Enwonwu CO, Xu XX, Turner E. Nitrogen metabolism in sickle cell 
anemia: free amino acids in plasma and urine. The American 
journal of the medical sciences. 1990; 300(6):366-371. 
https://doi.org/10.1097/00000441-199012000-00005 
PMid:2264574 

20. Borel MJ, Buchowski MS, Turner EA, Peeler BB, Goldstein RE, 
Flakoll PJ. Alterations in basal nutrient metabolism increase 
resting energy expenditure in sickle cell disease. American Journal 
of Physiology-Endocrinology and Metabolism. 1998; 274(2):E357-
364. https://doi.org/10.1152/ajpendo.1998.274.2.E357 
PMid:9486169 

https://doi.org/10.1007/978-981-99-8933-1_21
https://doi.org/10.1186/s43042-024-00623-1
https://doi.org/10.53555/jaz.v45i1.3390
https://doi.org/10.23880/hij-16000247
https://doi.org/10.23880/hij-16000247
https://doi.org/10.1016/j.scitotenv.2024.172883
https://doi.org/10.1016/j.vacuum.2025.114329
https://doi.org/10.1111/j.1440-1681.2007.04639.x
https://doi.org/10.1111/j.1440-1681.2007.04639.x
https://doi.org/10.1016/j.fuel.2014.09.055
https://doi.org/10.1016/j.diamond.2017.09.013
https://doi.org/10.1097/MD.0000000000039756
https://doi.org/10.22259/ijrsmhs.0502004
https://doi.org/10.1097/MD.0000000000038164
https://doi.org/10.1007/978-3-031-69150-8_26
https://doi.org/10.1007/978-3-031-69150-8_26
https://doi.org/10.1016/S0048-9697(01)01133-0
https://doi.org/10.1016/j.tplants.2018.09.008
https://doi.org/10.1097/00000441-199012000-00005
https://doi.org/10.1152/ajpendo.1998.274.2.E357


Emmanuel Ifeanyi Obeagu                                                                                                           Asian Journal of Dental and Health Sciences. 2025; 5(3):1-5 

[5]                                                                                                                                                                                                                                              AJDHS.COM 

21. Jackson AA. The use of stable isotopes to study nitrogen 
metabolism in homozygous sickle cell disease. InGenetic factors in 
nutrition. 1984: 297-315. Academic Press, New York. 
https://doi.org/10.1016/B978-0-12-715950-8.50024-X 
PMCid:PMC7131065 

22. Schnog JJ, Jager EH, van der Dijs FP, Duits AJ, Moshage H, Muskiet 
FD, Muskiet FA. Evidence for a metabolic shift of arginine 
metabolism in sickle cell disease. Annals of Hematology. 2004; 
83:371-375. https://doi.org/10.1007/s00277-004-0856-9 
PMid:15054669 

23. Darghouth D, Koehl B, Madalinski G, Heilier JF, Bovee P, Xu Y, 
Olivier MF, Bartolucci P, Benkerrou M, Pissard S, Colin Y. 
Pathophysiology of sickle cell disease is mirrored by the red blood 
cell metabolome. Blood, The Journal of the American Society of 
Hematology. 2011; 117(6):e57-66. 
https://doi.org/10.1182/blood-2010-07-299636 PMid:21135259 

24. Morris CR, Kato GJ, Poljakovic M, Wang X, Blackwelder WC, 
Sachdev V, Hazen SL, Vichinsky EP, Morris SM, Gladwin MT. 
Dysregulated arginine metabolism, hemolysis-associated 
pulmonary hypertension, and mortality in sickle cell disease. 
Jama. 2005; 294(1):81-90. 
https://doi.org/10.1001/jama.294.1.81 PMid:15998894 
PMCid:PMC2065861 

25. Zhou Y, Yu X, Nicely A, Cunningham G, Challa C, McKinley K, Nickel 
R, Campbell A, Darbari D, Summar M, Majumdar S. Amino acid 
signature during sickle cell pain crisis shows significant 
alterations related to nitric oxide and energy metabolism. 
Molecular genetics and metabolism. 2022; 137(1-2):146-152. 
https://doi.org/10.1016/j.ymgme.2022.08.004 PMid:36030599 

26. D'Alessandro A, Nouraie SM, Zhang Y, Cendali F, Gamboni F, Reisz 
JA, Zhang X, Bartsch KW, Galbraith MD, Espinosa JM, Gordeuk VR. 
Metabolic signatures of cardiorenal dysfunction in plasma from 
sickle cell patients as a function of therapeutic transfusion and 
hydroxyurea treatment. Haematologica. 2023; 108(12):3418. 
https://doi.org/10.3324/haematol.2023.283288 PMid:37439373 
PMCid:PMC10690926 

27. Obeagu EI, Prajapati SK, Maurya SD, Maternal Anemia in the 
Context of Infectious Diseases during Pregnancy: A Review, 
International Journal of Medical Sciences and Pharma Research, 
2025;11(1):8-13 https://doi.org/10.22270/ijmspr.v11i1.134 

28. Obeagu EI, Chukwu PH. Inclusive Healthcare Approaches for HIV-
Positive Sickle Cell Disease Patients: A Review. Current Research 
in Biological Sciences. 2025;1(1):01-8. 

29. Obeagu EI, Obeagu GU. Managing gastrointestinal challenges: 
diarrhea in sickle cell anemia. Medicine. 2024; 103(18):e38075. 
https://doi.org/10.1097/MD.0000000000038075 
PMid:38701274 PMCid:PMC11062666 

30. Obeagu EI, Obeagu GU. Living with sickle cell in Uganda: A 
comprehensive perspective on challenges, coping strategies, and 
health interventions. Medicine. 2024 Dec 20;103(51):e41062. 
https://doi.org/10.1097/MD.0000000000041062 
PMid:39705436 PMCid:PMC11666137 

31. Obeagu EI, Adias TC, Obeagu GU. Advancing life: innovative 
approaches to enhance survival in sickle cell anemia patients. 
Annals of Medicine and Surgery. 2024; 86(10):6021-6036. 
https://doi.org/10.1097/MS9.0000000000002534 
PMid:39359845 PMCid:PMC11444627 

32. Bell V, Varzakas T, Psaltopoulou T, Fernandes T. Sickle cell disease 
update: new treatments and challenging nutritional interventions. 
Nutrients. 2024; 16(2):258. 
https://doi.org/10.3390/nu16020258 PMid:38257151 
PMCid:PMC10820494 

33. Khan SA, Damanhouri G, Ali A, Khan SA, Khan A, Bakillah A, Marouf 
S, Al Harbi G, Halawani SH, Makki A. Precipitating factors and 
targeted therapies in combating the perils of sickle cell disease---A 
special nutritional consideration. Nutrition & metabolism. 2016; 
13:1-2. https://doi.org/10.1186/s12986-016-0109-7 
PMid:27508000 PMCid:PMC4977632 

34. Patel S, Patel R, Mukkala SR, Akabari A. Emerging therapies and 
management approaches in sickle cell disease (SCD): A critical 
review. Journal of Phytonanotechnology and Pharmaceutical 
Sciences. 2023; 3(3):1-1. 
https://doi.org/10.54085/jpps.2023.3.3.3 

35. Obeagu EI, Prajapati SK, Maurya SD, Anemia in Pregnancy: 
Exploring Non-Iron Deficiency Causes, International Journal of 
Medical Sciences and Pharma Research, 2025;11(1):1-7 
https://doi.org/10.22270/ijmspr.v11i1.130 

36. Boma PM, Kaponda AA, Panda J, Bonnechère B. Enhancing the 
management of pediatric sickle cell disease by integrating 
functional evaluation to mitigate the burden of vaso-occlusive 
crises. Journal of Vascular Diseases. 2024; 3(1):77-87. 
https://doi.org/10.3390/jvd3010007 

37. Obeagu EI, Chukwu PH. Inclusive Healthcare Approaches for HIV-
Positive Sickle Cell Disease Patients: A Review. Current Research 
in Biological Sciences. 2025;1(1):01-8. 

 

 

https://doi.org/10.1016/B978-0-12-715950-8.50024-X
https://doi.org/10.1007/s00277-004-0856-9
https://doi.org/10.1182/blood-2010-07-299636
https://doi.org/10.1001/jama.294.1.81
https://doi.org/10.1016/j.ymgme.2022.08.004
https://doi.org/10.3324/haematol.2023.283288
https://doi.org/10.22270/ijmspr.v11i1.134
https://doi.org/10.1097/MD.0000000000038075
https://doi.org/10.1097/MD.0000000000041062
https://doi.org/10.1097/MS9.0000000000002534
https://doi.org/10.3390/nu16020258
https://doi.org/10.1186/s12986-016-0109-7
https://doi.org/10.54085/jpps.2023.3.3.3
https://doi.org/10.22270/ijmspr.v11i1.130
https://doi.org/10.3390/jvd3010007

