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Insulin-like growth factor-1 receptor expression in the placentae of diabetic and normal pregnancies

Hayati AR, Cheah FC, Tan AE, Tan GC

Early Hum Dev, 2007 Jan;83(1):41-6.
PMID: 16750336 DOI: 10.1016/j.earlhumdev.2006.04.002

BACKGROUND: Septal hypertrophic cardiomyopathy (sHCM) is a characteristic anomaly of the infant of diabetic mother (IDM). Insulin-like growth factor-1 (IGF-1) has been identified as a mediator of tissue overgrowth and we have previously shown that maternal IGF-1 levels were significantly elevated among neonates with asymmetrical sHCM. IGF-1 does not cross the placenta; it exerts physiologic action through binding to the IGF-1 receptor (IGF-1R). Localisation and expression of IGF-1R in term diabetic pregnancies are largely unclear. We have studied IGF-1R in the placentae of diabetic and normal pregnancies and this receptor expression in association with neonates with sHCM.
METHODS: IGF-1R localization and expression in the placentae of six diabetic pregnancies associated with neonatal sHCM were compared with six each of randomly selected diabetic and normal pregnancies without neonatal sHCM by immunohistochemistry. The staining for IGF-1R in the deciduas, cytotrophoblasts, syncytiotrophoblasts and villous endothelium for these 18 samples were assessed and scored by two pathologists who were blinded to the respective diagnoses.
RESULTS: Placental IGF-1R staining was negative in the villous endothelium for all three groups. IGF-1R staining was present in deciduas, cytotrophoblasts and syncytiotrophoblasts but the staining was weaker in the entire group of infants with sHCM compared to those without sHCM.
CONCLUSIONS: IGF-1R is localized in all cell types of the placenta except in villous endothelium. Weaker placental IGF-1R staining in the placentae of diabetic pregnancies associated with sHCM suggests reduced expression of IGF-1R. This may be a down-regulatory response to elevated maternal IGF with neonatal sHCM outcome.
Fulltext Increased basal oxidation of peroxiredoxin 2 and limited peroxiredoxin recycling in glucose-6-phosphate dehydrogenase-deficient erythrocytes from newborn infants

Cheah FC, Peskin AV, Wong FL, Ithnin A, Othman A, Winterbourn CC

FASEB J, 2014 Jul;28(7):3205-10.
PMID: 24636884 DOI: 10.1096/fj.14-250050

Erythrocytes require glucose-6-phosphate dehydrogenase (G6PD) to generate NADPH and protect themselves against hemolytic anemia induced by oxidative stress. Peroxiredoxin 2 (Prx2) is a major antioxidant enzyme that requires NADPH to recycle its oxidized (disulfide-bonded) form. Our aims were to determine whether Prx2 is more highly oxidized in G6PD-deficient erythrocytes and whether these cells are able to recycle oxidized Prx2 after oxidant challenge. Blood was obtained from 61 Malaysian neonates with G6PD deficiency (average 33% normal activity) and 86 controls. Prx2 redox state was analyzed by Western blotting under nonreducing conditions. Prx2 in freshly isolated blood was predominantly reduced in both groups, but the median level of oxidation was significantly higher (8 vs 3%) and the range greater for the G6PD-deficient population. When treated with reagent H2O2, the G6PD-deficient erythrocytes were severely compromised in their ability to recycle oxidized Prx2, with only 27 or 4% reduction after 1 h treatment with 0.1 or 1 mM H2O2 respectively, compared with >97% reduction in control erythrocytes. The accumulation of oxidized Prx2 in oxidatively stressed erythrocytes with common G6PD variants suggests that impaired antioxidant activity of Prx2 could contribute to the hemolysis and other complications associated with the condition.-Cheah, F.-C., Peskin, A. V., Wong, F.-L., Ithnin, A., Othman, A., Winterbourn, C. C. Increased basal oxidation of peroxiredoxin 2 and limited peroxiredoxin recycling in glucose-6-phosphate dehydrogenase deficient erythrocytes from newborn infants.
Bacteria in expressed breastmilk from mothers of premature infants and maternal hygienic status

Dahaban NM, Romli MF, Roslan NR, Kong SS, Cheah FC

Breastfeed Med, 2013 Aug;8(4):422-3.
PMID: 23398139 DOI: 10.1089/bfm.2012.0109
Comparison of serum cardiac troponin T and creatine kinase MB isoenzyme mass concentrations in asphyxiated term infants during the first 48 h of life

Boo NY, Hafidz H, Nawawi HM, Cheah FC, Fadzil YJ, Abdul-Aziz BB, et al.

J Paediatr Child Health, 2005 Jul;41(7):331-7.
PMID: 16014136

This prospective study aimed to compare serum creatine kinase MB isoenzyme (CK-MB) mass concentrations and cardiac troponin T (cTnT) concentrations during the first 48 h of life in asphyxiated term infants.
Fulltext CRISPR Gene-Editing Models Geared Toward Therapy for Hereditary and Developmental Neurological Disorders

Wong PK, Cheah FC, Syafruddin SE, Mohtar MA, Azmi N, Ng PY, et al.

Front Pediatr, 2021;9:592571.
PMID: 33791256 DOI: 10.3389/fped.2021.592571

Hereditary or developmental neurological disorders (HNDs or DNDs) affect the quality of life and contribute to the high mortality rates among neonates. Most HNDs are incurable, and the search for new and effective treatments is hampered by challenges peculiar to the human brain, which is guarded by the near-impervious blood-brain barrier. Clustered Regularly Interspaced Short Palindromic Repeat (CRISPR), a gene-editing tool repurposed from bacterial defense systems against viruses, has been touted by some as a panacea for genetic diseases. CRISPR has expedited the research into HNDs, enabling the generation of in vitro and in vivo models to simulate the changes in human physiology caused by genetic variation. In this review, we describe the basic principles and workings of CRISPR and the modifications that have been made to broaden its applications. Then, we review important CRISPR-based studies that have opened new doors to the treatment of HNDs such as fragile X syndrome and Down syndrome. We also discuss how CRISPR can be used to generate research models to examine the effects of genetic variation and caffeine therapy on the developing brain. Several drawbacks of CRISPR may preclude its use at the clinics, particularly the vulnerability of neuronal cells to the adverse effect of gene editing, and the inefficiency of CRISPR delivery into the brain. In concluding the review, we offer some suggestions for enhancing the gene-editing efficacy of CRISPR and how it may be morphed into safe and effective therapy for HNDs and other brain disorders.
Intrauterine Gardnerella vaginalis Infection Results in Fetal Growth Restriction and Alveolar Septal Hypertrophy in a Rabbit Model

Cheah FC, Lai CH, Tan GC, Swaminathan A, Wong KK, Wong YP, et al.

Front Pediatr, 2020;8:593802.
PMID: 33553066 DOI: 10.3389/fped.2020.593802

Background:Gardnerella vaginalis (GV) is most frequently associated with bacterial vaginosis and is the second most common etiology causing intrauterine infection after Ureaplasma urealyticum. Intrauterine GV infection adversely affects pregnancy outcomes, resulting in preterm birth, fetal growth restriction, and neonatal pneumonia. The knowledge of how GV exerts its effects is limited. We developed an in vivo animal model to study its effects on fetal development. Materials and Methods: A survival mini-laparotomy was conducted on New Zealand rabbits on gestational day 21 (28 weeks of human pregnancy). In each dam, fetuses in the right uterine horn received intra-amniotic 0.5 × 102 colony-forming units of GV injections each, while their littermate controls in the left horn received sterile saline injections. A second laparotomy was performed seven days later. Assessment of the fetal pups, histopathology of the placenta and histomorphometric examination of the fetal lung tissues was done. Results: Three dams with a combined total of 12 fetuses were exposed to intra-amniotic GV, and 9 fetuses were unexposed. The weights of fetuses, placenta, and fetal lung were significantly lower in the GV group than the saline-inoculated control group [mean gross weight, GV (19.8 ± 3.8 g) vs. control (27.9 ± 1.7 g), p < 0.001; mean placenta weight, GV (5.5 ± 1.0 g) vs. control (6.5 ± 0.7 g), p = 0.027; mean fetal lung weight, GV (0.59 ± 0.11 g) vs. control (0.91 ± 0.08 g), p = 0.002. There was a two-fold increase in the multinucleated syncytiotrophoblasts in the placenta of the GV group than their littermate controls (82.9 ± 14.9 vs. 41.6 ± 13.4, p < 0.001). The mean alveolar septae of GV fetuses was significantly thicker than the control (14.8 ± 2.8 μm vs. 12.4 ± 3.8 μm, p = 0.007). Correspondingly, the proliferative index in the interalveolar septum was 1.8-fold higher in the GV group than controls (24.9 ± 6.6% vs. 14.2 ± 2.9%, p = 0.011). The number of alveoli and alveolar surface area did not vary between groups. Discussion: Low-dose intra-amniotic GV injection induces fetal growth restriction, increased placental multinucleated syncytiotrophoblasts and fetal lung re-modeling characterized by alveolar septal hypertrophy with cellular proliferative changes. Conclusion: This intra-amniotic model could be utilized in future studies to elucidate the acute and chronic effects of GV intrauterine infections.
Nutritional therapies in the neonatal intensive care unit and post-natal growth outcomes of preterm very low birthweight Asian infants

Lee LY, Lee J, Niduvaje K, Seah SS, Atmawidjaja RW, Cheah FC

J Paediatr Child Health, 2020 Mar;56(3):400-407.
PMID: 31618507 DOI: 10.1111/jpc.14634

AIM: A collaborative study was conducted between two Southeast Asian university hospitals to compare the nutritional intervention and growth outcomes and evaluate the extent of post-natal growth faltering (PNGF) among very low birthweight (VLBW) infants.
METHODS: Data of all infants admitted during the 2011-2012 period to the two hospitals at Singapore (SG) and Malaysia (MY) were pooled and analysed.
RESULTS: Of the 236 infants, SG infants received lower total protein and energy intake than MY infants (2.69 vs. 3.54 g/kg/day and 92.4 vs. 128.9 kcal/kg/day respectively; P -2 SDS (55 vs. 16%; P = 0.001). The greater use of a diuretic in SG to treat haemodynamically significant patent ductus arteriosus (hsPDA) may have contributed to the higher PNGF rate. Mean growth velocity of at least 15 g/kg/day was attained by VLBW infants only from Day 14 and by ELBW infants only from Day 28 post-natally. Overall, severe PNGF rates (z-score change >-2 SDS at 36 weeks' corrected age) were 28.8 and 36.5% for VLBW and ELBW infants, respectively.
CONCLUSIONS: Being very preterm, ELBW with hsPDA and receiving insufficient protein and energy were risk factors for severe PNGF. Increasing protein and energy content, augmenting fortification of breast milk and concentrating feed volumes, especially if there is an hsPDA, may curb severe PNGF among these infants.
Fulltext The role of serum insulin-like growth factor I (IGF-I) in neonatal outcome

Hayati AR, Cheah FC, Yong JF, Tan AE, Norizah WM

J Clin Pathol, 2004 Dec;57(12):1299-301.
PMID: 15563671

AIMS: To determine the role of serum insulin-like growth factor I (IGF-I) in predicting the occurrence of septal hypertrophic cardiomyopathy in infants of mothers with diabetes.
METHODS/MATERIALS: In this prospective study, 100 pregnant women (50 with diabetes and 50 controls), matched for age and race, were studied. One intrapartum blood sample was taken at 28 weeks of gestation from both groups of mothers and another sample at delivery. All samples were analysed for maternal IGF-I by an enzyme linked immunosorbent assay method. A chest radiograph and an electrocardiogram were performed on the babies of the mothers with diabetes within the first 24 hours of life. An echocardiogram was performed in the first 3 days of life to look for septal hypertrophy and to measure the myocardial thickness.
RESULTS: In the six cases of neonatal septal hypertrophic cardiomyopathy, all the mothers had greatly raised IGF-I concentrations of more than 400 ng/ml at the time of delivery compared with a mean (SD) of 302 (25) ng/ml in control mothers.
CONCLUSIONS: In the present study a crude analysis revealed that increased IGF-I concentrations correlate with neonatal septal hypertrophic cardiomyopathy.
Study site: Obstetric and gynaecology clinic, Pusat Perubatan Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
Umbilical artery resistance index in diabetic pregnancies: the associations with fetal outcome and neonatal septal hypertrophic cardiomyopathy

Tan AE, Norizah WM, Rahman HA, Aziz BA, Cheah FC

J Obstet Gynaecol Res, 2005 Aug;31(4):296-301.
PMID: 16018775 DOI: 10.1111/j.1447-0756.2005.00291.x

Aim: To determine the incidence of an abnormal umbilical artery resistance index (UARI) in diabetic pregnancies and the relation to fetal outcome and the development of neonatal septal hypertrophic cardiomyopathy.

Methods: A case-control study with subjects comprising 50 randomly selected diabetic mothers and a matched control group of 50 non-diabetic pregnancies. Doppler studies of the UARI were carried out at least once per week, beginning from 36 weeks' gestation for both groups. Within 48 h post delivery, echocardiograms were carried out on the newborn infants to identify those with hypertrophic cardiomyopathy, particularly asymmetrical septal hypertrophy.

Results: The numbers of patients with abnormal UARI were similar in both the diabetic and control groups. A higher proportion of operative deliveries for intrapartum fetal distress was seen in patients with an abnormal UARI in the diabetic group. However, the groups did not differ in the numbers of infants who were small for gestational age, who had low Apgar scores or umbilical artery acidosis, and who required admission to the special care nursery. Six infants of diabetic mothers (12%) had septal hypertrophy, but none of these were associated with abnormal antenatal UARI.

Conclusion: Diabetic pregnancy is not associated with a significantly higher incidence of abnormal UARI on Doppler study than non-diabetic pregnancy. UARI is not a useful single indicator by which to predict subsequent fetal outcome or the development of neonatal septal hypertrophic cardiomyopathy in diabetic pregnancies.
Fulltext Maternal and umbilical cord blood polymorphonuclear leukocytes showed moderate oxidative burst at phagocytosis of Gardnerella vaginalis

Swaminathan A, Abd Aziz NH, Ayub NA, Wong KK, Cheah FC

BMC Res Notes, 2021 Nov 22;14(1):420.
PMID: 34809696 DOI: 10.1186/s13104-021-05842-y

OBJECTIVE: Pregnant women with bacterial vaginosis due to Gardnerella vaginalis (GV) infection presents with a wide-ranging disease symptomatology. We speculate this may be due to interaction that varies between host immune response and the pathogen. We studied the oxidative burst in polymorphonuclear leukocytes (PMNL)s from maternal blood (MB) and cord blood (CB) upon phagocytosis of GV and compared against E. coli and Group B Streptococcus (GBS).
RESULTS: The PHAGOBURST™ assay detects fluorescence from oxidized dihydrorhodamine during oxidative burst. The average percentage of PMNL showing oxidative burst was almost two-fold greater with GBS (99.5%) and E. coli (98.2%) than GV (56.9%) (p
Recommended Nutrient Intake Levels for Preterm Infants

Koletzko B, Wieczorek S, Cheah FC, Domellöf M, van Goudoever JB, Poindexter BB, et al.

World Rev Nutr Diet, 2021;122:191-197.
PMID: 34352778 DOI: 10.1159/000514772
Fulltext Prevalence and Management of Functional Gastrointestinal Disorders in Infants: An Asian Perspective

Cai W, Bharadia L, Juffrie M, Cheah FC, Quak SH, Titapant V, et al.

Pediatr Gastroenterol Hepatol Nutr, 2018 Jan;21(1):76-77.
PMID: 29383309 DOI: 10.5223/pghn.2018.21.1.76
Fulltext Studying the Effects of Granulocyte-Macrophage Colony-Stimulating Factor on Fetal Lung Macrophages During the Perinatal Period Using the Mouse Model

Cheah FC, Presicce P, Tan TL, Carey BC, Kallapur SG

Front Pediatr, 2021;9:614209.
PMID: 33777863 DOI: 10.3389/fped.2021.614209

Background: Granulocyte-macrophage colony-stimulating factor (GM-CSF) is a pro-inflammatory cytokine that is increased in the amniotic fluid in chorioamnionitis and elevated in the fetal lung with endotoxin exposure. Although GM-CSF has a pivotal role in fetal lung development, it stimulates pulmonary macrophages and is associated with the development of bronchopulmonary dysplasia (BPD). How antenatal GM-CSF results in recruitment of lung macrophage leading to BPD needs further elucidation. Hence, we used a transgenic and knock-out mouse model to study the effects of GM-CSF focusing on the fetal lung macrophage. Methods: Using bitransgenic (BTg) mice that conditionally over-expressed pulmonary GM-CSF after doxycycline treatment, and GM-CSF knock-out (KO) mice with no GM-CSF expression, we compared the ontogeny and immunophenotype of lung macrophages in BTg, KO and control mice at various prenatal and postnatal time points using flow cytometry and immunohistology. Results: During fetal life, compared to controls, BTg mice over-expressing pulmonary GM-CSF had increased numbers of lung macrophages that were CD68+ and these were primarily located in the interstitium rather than alveolar spaces. The lung macrophages that accumulated were predominantly CD11b+F4/80+ indicating immature macrophages. Conversely, lung macrophages although markedly reduced, were still present in GM-CSF KO mice. Conclusion: Increased exposure to GM-CSF antenatally, resulted in accumulation of immature macrophages in the fetal lung interstitium. Absence of GM-CSF did not abrogate but delayed the transitioning of interstitial macrophages. Together, these results suggest that other perinatal factors may be involved in modulating the maturation of alveolar macrophages in the developing fetal lung.
The Promises and Pitfalls of CRISPR-Mediated Base Editing in Stem Cells

Wong PK, Mohamad Zamberi NN, Syafruddin SE, Cheah FC, Azmi N, Law JX, et al.

CRISPR J, 2023 Jun;6(3):196-215.
PMID: 37219623 DOI: 10.1089/crispr.2023.0013

Stem cells such as induced pluripotent stem cells, embryonic stem cells, and hematopoietic stem and progenitor cells are growing in importance in disease modeling and regenerative medicine. The applications of CRISPR-based gene editing to create a mélange of disease and nondisease stem cell lines have further enhanced the utility of this innately versatile group of cells in the studies of human genetic disorders. Precise base edits can be achieved using a variety of CRISPR-centric approaches, particularly homology-directed repair and the recently developed base editors and prime editors. Despite its much-touted potential, editing single DNA bases is technically challenging. In this review, we discuss the strategies for achieving exact base edits in the creation of various stem cell-based models for use in elucidating disease mechanisms and assessing drug efficacy, and the unique characteristics of stem cells that warrant special considerations.
Fulltext Antenatal Corticosteroids to Asian Women Prior to Elective Cesarean Section at Early Term and Effects on Neonatal Respiratory Outcomes

Arsad N, Abd Razak N, Omar MH, Shafiee MN, Kalok A, Cheah FC, et al.

Int J Environ Res Public Health, 2022 Apr 25;19(9).
PMID: 35564596 DOI: 10.3390/ijerph19095201

This exploratory study aimed to evaluate the effects of antenatal corticosteroids in singleton pregnancies of Asian women prior to elective cesarean section (CS) at early term on neonatal respiratory outcomes.
METHODS: This is a pilot and pragmatic randomized trial conducted at a university hospital in Malaysia. Women with singleton pregnancies planned for elective CS between 37+0 and 38+6 weeks gestation were randomly allocated into the intervention group, where they received two doses of IM dexamethasone 12 mg of 12 h apart, 24 h prior to surgery OR into the standard care, control group, and both groups received the normal routine antenatal care. The primary outcome measures were neonatal respiratory illnesses, NICU admission and length of stay.
RESULTS: A total of 189 patients were recruited, 93 women in the intervention group and 96 as controls. Between the steroid and control groups, the mean gestation at CS was similar, 266.1 ± 3.2 days (38 weeks) vs. 265.8 ± 4.0 days (37+6 weeks), p = 0.53. The mean birthweight of infants was 3.06 ± 0.41 kg vs. 3.04 ± 0.37 kg, p = 0.71. Infants with respiratory morbidities were primarily due to transient tachypnea of newborn (9.7% vs. 6.3%), and congenital pneumonia (1.1% vs. 3.1%) but none had respiratory distress syndrome. Only four infants required NICU admission (2.2% vs. 3.1%, p = 0.63). Their average length of stay was not statistically different; 3.5 ± 2.1 days vs. 5.7 ± 1.5 days, p = 0.27.
CONCLUSIONS: Elective CS at early term before 39 weeks was associated with a modest overall incidence of neonatal respiratory illness (10.1%) in this Asian population. Antenatal dexamethasone did not diminish infants needing respiratory support, NICU admission and length of stay.
Editorial: Saving mothers and babies for the new world

Ahmad Kamar A, Cheah FC, Ismail H, Pejaver R, Ellwood DA, Mahdy ZA

Front Surg, 2023;10:1291596.
PMID: 37841814 DOI: 10.3389/fsurg.2023.1291596
Fulltext Antimicrobial stewardship and targeted therapies in the changing landscape of maternal sepsis

Shah NM, Charani E, Ming D, Cheah FC, Johnson MR

J Intensive Med, 2024 Jan;4(1):46-61.
PMID: 38263965 DOI: 10.1016/j.jointm.2023.07.006

Pregnant and postnatal women are a high-risk population particularly prone to rapid progression to sepsis with significant morbidity and mortality worldwide. Moreover, severe maternal infections can have a serious detrimental impact on neonates with almost 1 million neonatal deaths annually attributed to maternal infection or sepsis. In this review we discuss the susceptibility of pregnant women and their specific physiological and immunological adaptations that contribute to their vulnerability to sepsis, the implications for the neonate, as well as the issues with antimicrobial stewardship and the challenges this poses when attempting to reach a balance between clinical care and urgent treatment. Finally, we review advancements in the development of pregnancy-specific diagnostic and therapeutic approaches and how these can be used to optimize the care of pregnant women and neonates.
Introduction of a single-nucleotide variant, rs16851030, into the ADORA1 gene increased cellular susceptibility to hypoxia

Wong PK, Syafruddin SE, Cheah FC, Azmi N, Ng PY, Chua EW

Per Med, 2024;21(6):353-366.
PMID: 39440484 DOI: 10.1080/17410541.2024.2412514

Aim: Rs16851030, a single-nucleotide variant located in the 3'-untranslated region of the ADORA1 gene, has been proposed as a potential marker of caffeine sensitivity in apnea of prematurity. Besides, it is associated with aspirin-induced asthma and the development of acute chest syndrome. However, its functional significance is still unconfirmed. This study aimed to elucidate the functional impact of rs16851030 by using CRISPR/Cas9 approach to induce the DNA variant and attendant physiological changes.Methods: Rs16851030 was introduced into HEK293 cells via homology-directed repair (HDR). Edited cells were fluorescence-enriched, sorted, isolated, and expanded into single-cell-derived clones. The edit was confirmed by Sanger sequencing. RNA sequencing was used to analyze affected pathways.Results: Rs16851030-mutant cells showed increased susceptibility to hypoxia, a condition related to apnea of prematurity. After 24 h of hypoxia, the viability of mutant clones 1 and 2 was low compared with wild-type cells (75.45% and 74.47% vs. 96.34%). RNA sequencing revealed transcriptomic changes linked to this increased vulnerability.Conclusion: Rs16851030 impairs cellular resistance to hypoxia, suggesting its role in conditions like apnea of prematurity. Further research should investigate the molecular mechanisms and transcriptomic alterations caused by rs16851030 under hypoxic conditions.
A Comparison of Once- and Thrice-Weekly Erythropoietin Dosing for the Treatment of Anaemia of Prematurity

Lim CP, Md-Redzuan A, Lai YK, Borhanuddin B, Cheah FC

Ann Acad Med Singap, 2017 10;46(10):395-398.
PMID: 29177368
Fulltext The Potential of Mesenchymal Stromal Cell as Therapy in Neonatal Diseases

Liau LL, Al-Masawa ME, Koh B, Looi QH, Foo JB, Lee SH, et al.

Front Pediatr, 2020;8:591693.
PMID: 33251167 DOI: 10.3389/fped.2020.591693

Mesenchymal stromal cells (MSCs) can be derived from various tissue sources, such as the bone marrow (BMSCs), adipose tissue (ADSCs), umbilical cord (UC-MSCs) and umbilical cord blood (UCB-MSCs). Clinical trials have been conducted to investigate the potential of MSCs in ameliorating neonatal diseases, including bronchopulmonary dysplasia (BPD), intraventricular hemorrhage (IVH) and necrotizing enterocolitis (NEC). In preclinical studies, MSC therapy has been tested for the treatment of various neonatal diseases affecting the heart, eye, gut, and brain as well as sepsis. Up to date, the number of clinical trials using MSCs to treat neonatal diseases is still limited. The data reported thus far positioned MSC therapy as safe with positive outcomes. However, most of these trials are still preliminary and generally smaller in scale. Larger trials with more appropriate controls and a longer follow-up period need to be conducted to prove the safety and efficacy of the therapy more conclusively. This review discusses the current application of MSCs in treating neonatal diseases, its mechanism of action and future direction of this novel therapy, including the potential of using MSC-derived extracellular vesicles instead of the cells to treat various clinical conditions in the newborn.

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