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Mahe A, Muhammad Y, Ibrahim A, Muhammad A, Adam I, Atiku M, Imam A. In vivo and in vitro Toxicity Studies of Crude and Partially Purified Leaf Extracts of Jatropha curcas in Wistar Albino Rats. JOURNAL OF PHARMACEUTICAL RESEARCH INTERNATIONAL 2017. [DOI: 10.9734/jpri/2017/38137] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ajao MS, Sansa AB, Imam A, Ibrahim A, Adana MY, Alli-Oluwafuyi A, Kareem SB. Protective Effect of Nigella Sativa (Black Caraway (Oil on Oral Dichlorvos Induced Hematological, Renal and Nonspecific Immune System Toxicity in Wistar Rats. IRANIAN JORNAL OF TOXICOLOGY 2017. [DOI: 10.29252/arakmu.11.6.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Stratakis N, Gielen M, Margetaki K, Godschalk RW, van der Wurff I, Rouschop S, Ibrahim A, Antoniou E, Chatzi L, de Groot RHM, Zeegers MP. Polyunsaturated fatty acid levels at birth and child-to-adult growth: Results from the MEFAB cohort. Prostaglandins Leukot Essent Fatty Acids 2017; 126:72-78. [PMID: 29031398 DOI: 10.1016/j.plefa.2017.09.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 09/06/2017] [Accepted: 09/09/2017] [Indexed: 11/18/2022]
Abstract
BACKGROUND Prenatal exposure to polyunsaturated fatty acids (PUFAs) may influence childhood growth. However, available evidence mostly derived from short-term studies is inconsistent. OBJECTIVE To assess whether fetal PUFA exposure is associated with height and body mass index (BMI), a common measure of adiposity, from 6 months to 23 years of age. METHODS In the MEFAB cohort, we assessed cord blood phospholipid n-3 and n-6 PUFA levels, reflecting fetal exposure in late pregnancy. For 250 (45.2% females) participants, we collected a total of 1770 (n= 802 for females) repeated growth measurements from infancy to young adulthood. We examined sex-specific associations of PUFAs with height and BMI at different developmental ages (infant: 6 months; toddler: 2 years; pre-schooler: 4 years; school-aged child: 7 years; adolescent: 12 years; and young adult: 23 years) using fractional polynomial mixed models adjusted for important covariates. RESULTS Higher n-3 PUFA levels were associated with higher infant length in males (β= 0.44cm [95% CI: 0.07, 0.82] per SD increase), whereas, for females, higher n-6 PUFA concentrations were associated with lower length in infancy (β= -0.69cm [95% CI: -1.08, -0.30] per SD increase). A higher ratio of n-3 to n-6 PUFAs was associated with higher infant length in both sexes (β= 0.40cm [95% CI: 0.01, 0.78] and 0.42cm [95% CI: 0.05, 0.79] per unit increase for males and females, respectively). These associations were not detectable later in childhood and young adulthood. No associations with BMI were found at any time point examined. CONCLUSIONS Our findings suggest a small sex-specific influence of PUFA status at birth on length in infancy, but this does not persist in later life up to young adulthood. PUFA status at birth does not seem to affect BMI from infancy till young adulthood.
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Kösek V, Geleva V, De Waele M, Milea SL, Ibrahim A, Wiebe K. P-211RECONSTRUCTION OF THE CHEST WALL WITH BIOLOGICAL MATERIALS. Interact Cardiovasc Thorac Surg 2017. [DOI: 10.1093/icvts/ivx280.211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Retailleau M, Pierrel J, Ibrahim A, Croutxé-Barghorn C, Allonas X. Sequenced click chemistry and photopolymerization: a new approach toward semi-interpenetrating polymer networks. POLYM ADVAN TECHNOL 2017. [DOI: 10.1002/pat.4141] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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106
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Ibrahim A, Babandi A, Sani A, Wudil A, Murtala Y, Umar I. HPLC profile, in vitro alpha-amylase, alpha-glucosidase inhibitory and antioxidant activities of Gymnema sylvestre ethyl acetate leaf extract. ACTA ACUST UNITED AC 2017. [DOI: 10.4314/bajopas.v10i1.11] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Ibrahim A, Elsotohi I, Mahjoub S, Elatreisy A, Soliman K, Mabrouk M, Khalaf I. Factors determining perioperative complications of percutaneous nephrolithotomy: A single center perspective. AFRICAN JOURNAL OF UROLOGY 2017. [DOI: 10.1016/j.afju.2017.05.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Cameli M, Mandoli G, Lisi E, Ibrahim A, Incampo E, Buccoliero G, Rizzo C, Devito F, Ciccone M, Mondillo S. P3335Atrial, ventricular and global atrio-ventricular longitudinal strain analysis in asymptomatic patients with arterial hypertension and diabetes mellitus. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p3335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Kaddoura I, Abu-Sittah G, Ibrahim A, Karamanoukian R, Papazian N. Burn injury: review of pathophysiology and therapeutic modalities in major burns. ANNALS OF BURNS AND FIRE DISASTERS 2017; 30:95-102. [PMID: 29021720 PMCID: PMC5627559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Accepted: 04/07/2017] [Indexed: 06/07/2023]
Abstract
Despite a considerable decrease in their incidence worldwide, burn injuries remain one of the commonest forms of trauma and account for a weighty proportion of trauma cases in health-care emergencies around the globe. Although the latest data reveal a substantial decline in burn-related mortality and hospital admissions in the US over the past three decades, severe thermal injuries continue to trigger devastating morbidity and significant mortality while their management remains a dynamic challenge for the entire medical and paramedical community. Concrete evidence continues to be established regarding burn-associated pathophysiologic responses, and their destructive sequelae and deleterious effects in survivors at cellular, systemic as well as socio-economic level. Better understanding of these responses have contributed to advances in therapeutic strategies, improved long-term outcomes and catalyzed the reintegration of victims back into society. This paper describes the current understanding of the pathophysiology of a burn injury and characterizes both local and systemic pathophysiologic responses in terms of metabolic, hemodynamics, cardiac, renal, hepatic, gastro-intestinal, immunologic, endocrine as well as male reproductive systems in an attempt to understand the corresponding treatment modalities for this unique patient population.
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Mohamed K, Ibrahim A, Abd-Allah N. An optimized search for exoplanets with Kepler data. JOURNAL OF PHYSICS: CONFERENCE SERIES 2017; 869:012074. [DOI: 10.1088/1742-6596/869/1/012074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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El-Guebaly L, Wilson P, Henderson D, Sawan M, Sviatoslavsky G, Tautges T, Slaybaugh R, Kiedrowski B, Ibrahim A, Martin C, Raffray R, Malang S, Lyon J, Ku LP, Wang X, Bromberg L, Merrill B, Waganer L, Najmabadi F. Designing ARIES-CS Compact Radial Build and Nuclear System: Neutronics, Shielding, and Activation. FUSION SCIENCE AND TECHNOLOGY 2017. [DOI: 10.13182/fst54-747] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Olajide OJ, Ugbosanmi AT, Enaibe BU, Ogunrinola KY, Lewu SF, Asogwa NT, Akapa T, Imam A, Ibrahim A, Gbadamosi IT, Yawson EO. Cerebellar Molecular and Cellular Characterization in Rat Models of Alzheimer's Disease: Neuroprotective Mechanisms of Garcinia Biflavonoid Complex. Ann Neurosci 2017; 24:32-45. [PMID: 28827919 DOI: 10.1159/000464421] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 10/04/2016] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Recent evidences suggest that cerebellar degeneration may be associated with the development of Alzheimer's disease (AD). However, previous reports were mainly observational, lacking substantial characterization of cellular and molecular cerebellar features during AD progression. PURPOSE This study is aimed at characterizing the cerebellum in rat models of AD and assessing the corresponding neuroprotective mechanisms of Garcinia biflavonoid complex (GBc). METHODS Male Wistar rats were grouped and treated alone or in combination with PBS (ad libitum)/day, corn oil (CO; 2 mL/kgBw/day), GBc (200 mg/kgBw/day), sodium azide (NaN3) (15 mg/kgBw/day) and aluminium chloride (AlCl3) (100 mg/kgBw/day). Groups A and B received PBS and CO, respectively; C received GBc; D received NaN3; E received AlCl3; F received NaN3 then GBc subsequently; G received AlCl3 then GBc subsequently; H received NaN3 and GBc simultaneously while I received AlCl3 and GBc simultaneously. Following treatments, cerebellar cortices were processed for histology, immunohistochemistry and colorimetric assays. RESULTS Our data revealed that cryptic granule neurons and pyknotic Purkinje cell bodies (characterized by short dendritic/axonal processes) correspond to indistinctly demarcated cerebellar layers in rats treated with AlCl3 and NaN3. These correlates, with observed hypertrophic astrogliosis, increased the neurofilament deposition, depleted the antioxidant system-shown by expressed superoxide dismutase and glutathione peroxidase, and cerebellar glucose bioenergetics dysfunction-exhibited in assayed lactate dehydrogenase and glucose-6-phosphate dehydrogenase. We further showed that GBc reverses cerebellar degeneration through modulation of neurochemical signaling pathways and stressor molecules that underlie AD pathogenesis. CONCLUSION Cellular, molecular and metabolic neurodegeneration within the cerebellum is associated with AlCl3 and NaN3-induced AD while GBc significantly inhibits corresponding neurotoxicity and is more efficacious when pre-administered.
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El Cheikh J, Massoud R, Abudalle I, Haffar B, Mahfouz R, Kharfan-Dabaja MA, Jisr T, Mougharbel A, Ibrahim A, Bazarbachi A. Nivolumab salvage therapy before or after allogeneic stem cell transplantation in Hodgkin lymphoma. Bone Marrow Transplant 2017; 52:1074-1077. [PMID: 28394366 DOI: 10.1038/bmt.2017.69] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Najmabadi F, Raffray AR, Abdel-Khalik SI, Bromberg L, Crosatti L, El-Guebaly L, Garabedian PR, Grossman AA, Henderson D, Ibrahim A, Ihli T, Kaiser TB, Kiedrowski B, Ku LP, Lyon JF, Maingi R, Malang S, Martin C, Mau TK, Merrill B, Moore RL, Peipert RJ, Petti DA, Sadowski DL, Sawan M, Schultz JH, Slaybaugh R, Slattery KT, Sviatoslavsky G, Turnbull A, Waganer LM, Wang XR, Weathers JB, Wilson P, Waldrop JC, Yoda M, Zarnstorffh M. The ARIES-CS Compact Stellarator Fusion Power Plant. FUSION SCIENCE AND TECHNOLOGY 2017. [DOI: 10.13182/fst54-655] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Ajao MS, Abdussalam WA, Imam A, Amin A, Ibrahim A, Adana MY, Sulaimon FA, Atata JA. Histopathological and Biochemical evaluations of the antidotal efficacy of <i>Nigella sativa</i> oil on organophosphate induced hepato-toxicity. RESEARCH JOURNAL OF HEALTH SCIENCES 2017. [DOI: 10.4314/rejhs.v5i1.3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Nazif H, Shatla R, Elsayed R, Tawfik E, Osman N, Korra S, Ibrahim A. Bone mineral density and insulin-like growth factor-1 in children with spastic cerebral palsy. Childs Nerv Syst 2017; 33:625-630. [PMID: 28236062 DOI: 10.1007/s00381-017-3346-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 01/13/2017] [Indexed: 11/30/2022]
Abstract
BACKGROUND Children with cerebral palsy (CP) have significant decrease linear growth rate and low bone mineral density (BMD). AIMS This study is to evaluate BMD in children with CP and its relation to the levels of insulin-like growth factor-1 (IGF-1). SUBJECTS AND METHODS This cross-sectional study was carried out on 58 children suffering from spastic CP with the age range 4-12 years compared to 19 controls. All assessed by dual energy x-ray absorptiometry (DXA) to measure BMD, serum level of IGF-1, and serum vitamin D. The patients were classified according to their GMFCS. RESULTS Fractures were reported in seven (12.1%) of cases. Our study demonstrated that, IGF-1 level and BMD decrease in correlation with the severity of CP. IGF-1correlates positively with serum vitamin D, BMI, and BMD. CP children with severe GMFCS level or who use anticonvulsive drugs are at a high risk for low BMD and low levels of IGF-1. CONCLUSION Both BMD and IGF-1 were significantly in low children with spastic CP; IGF-1 negatively correlates with the severity of osteopenia in children with spastic. Children with CP who are not independently ambulant or with severe GMFCS level or who use anticonvulsive drugs are at a high risk for developing low BMD.
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Sawan ME, McGeoch MW, Ibrahim A, Wilson P. Nuclear Assessment of Final Optics of a KrF Laser Driven Fusion Power Plant. FUSION SCIENCE AND TECHNOLOGY 2017. [DOI: 10.13182/fst07-a1614] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Okwesili AN, Onuigwe FU, Ibrahim K, Buhari H, Ibrahim A, Jafaru H, Erhabor O, Onuigwe FU, Isaac Z, Ahmed MH, Mainasara MY, Adias TC, Yeldu MH, Uko EK, Udoma F. Prevalence of Hepatitis B surface antigen among biomedical students of African descent in Usmanu Danfodiyo University, Sokoto, Nigeria. Hum Antibodies 2017; 23:57-62. [PMID: 27472863 DOI: 10.3233/hab-150282] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Hepatitis B (HB) is a serious global public health problem that put health professionals particularly at risk. OBJECTIVE The aim of this study was to investigate the prevalence of Hepatitis B surface antigen (HBsAg) among Biomedical Students of African descent attending Usmanu Danfodiyo University Sokoto in North-Western Nigeria. METHODS The Onsite HBsAg (CTK Biotech, USA) was used to detect the presence of hepatitis B surface antigen. RESULTS We tested 186 consecutively-recruited students consisting of 147 males and 39 females aged 18-35 years (mean age 26 ± 2.0 years). Of the 186 students tested, 25 (13.4%) were positive for HBsAg. The prevalence of HBsAg was significantly higher among students in the 21-25 years age group. Hepatitis B vaccination uptake among students was 7%. Majority of subjects were single 173(93.1%) compared to married 13 (6.9%). Ethnic distribution of the subjects indicated that 104(55.9%) were Hausa compared to Yoruba 32 (17.2%), other ethnic groups 21(11.3%), Fulani 20(10.8%) and Igbo 9(4.8%). CONCLUSIONS This study indicates a high prevalence of hepatitis B virus infection among Biomedical students in Sokoto, North Western, Nigeria. Finding from this study is enough justification for the implementation of a policy to routinely test students entering into the biomedical professions for Hepatitis B virus infection. There is the need to provide hepatitis B vaccination universally to all those who are found negative prior to commencement of their biomedical training. There is also need to educate students entering biomedical professions and healthcare workers on the modes of transmission and prevention, importance of being compliant with protective vaccination as well as the need to observe universal precaution and infection control guidelines during their training and future professional practice.
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Imam A, Ajao MS, Akinola OB, Ajibola MI, Ibrahim A, Amin A, Abdulmajeed WI, Lawal ZA, Ali-Oluwafuyi A. Repeated Acute Oral Exposure to Cannabis sativa Impaired Neurocognitive Behaviours and Cortico-hippocampal Architectonics in Wistar Rats. Niger J Physiol Sci 2017; 31:153-159. [PMID: 28262852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Accepted: 03/06/2017] [Indexed: 06/06/2023]
Abstract
The most abused illicit drug in both the developing and the developed world is Cannabis disposing users to varying forms of personality disorders. However, the effects of cannabis on cortico-hippocampal architecture and cognitive behaviours still remain elusive. The present study investigated the neuro-cognitive implications of oral cannabis use in rats. Eighteen adult Wistar rats were randomly grouped to three. Saline was administered to the control rats, cannabis (20 mg/kg) to the experimental group I, while Scopolamine (1 mg/kg. ip) was administered to the last group as a standard measure for the cannabis induced cognitive impairment. All treatments lasted for seven consecutive days. Open Field Test (OFT) was used to assess locomotor activities, Elevated Plus Maze (EPM) for anxiety-like behaviour, and Y maze paradigm for spatial memory and data subjected to ANOVA and T test respectively. Thereafter, rats were sacrificed and brains removed for histopathological studies. Cannabis significantly reduced rearing frequencies in the OFT and EPM, and increased freezing period in the OFT. It also reduced percentage alternation similar to scopolamine in the Y maze, and these effects were coupled with alterations in the cortico-hippocampal neuronal architectures. These results point to the detrimental impacts of cannabis on cortico-hippocampal neuronal architecture and morphology, and consequently cognitive deficits.
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Salamoun W, Abi Gerges D, Khairallah S, Yatim A, El-Houkayem M, Ibrahim A, Khater R. Sentinel lymph node mapping in breast cancer after neoadjuvant chemotherapy: a single institution experience. Breast 2017. [DOI: 10.1016/s0960-9776(17)30257-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Olajide OJ, Yawson EO, Gbadamosi IT, Arogundade TT, Lambe E, Obasi K, Lawal IT, Ibrahim A, Ogunrinola KY. Ascorbic acid ameliorates behavioural deficits and neuropathological alterations in rat model of Alzheimer's disease. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2017; 50:200-211. [PMID: 28192749 DOI: 10.1016/j.etap.2017.02.010] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Revised: 02/03/2017] [Accepted: 02/05/2017] [Indexed: 05/22/2023]
Abstract
Exploring the links between neural pathobiology and behavioural deficits in Alzheimer's disease (AD), and investigating substances with known therapeutic advantages over subcellular mechanisms underlying these dysfunctions could advance the development of potent therapeutic molecules for AD treatment. Here we investigated the efficacy of ascorbic acid (AA) in reversing aluminium chloride (AlCl3)-induced behavioural deficits and neurotoxic cascades within prefrontal cortex (PFC) and hippocampus of rats. A group of rats administered oral AlCl3 (100mg/kg) daily for 15days showed degenerative changes characterised by significant weight loss, reduced exploratory/working memory, frontal-dependent motor deficits, cognitive decline, memory dysfunction and anxiety during behavioural assessments compared to control. Subsequent analysis showed that oxidative impairment-indicated by depleted superoxide dismutase and lipid peroxidation (related to glutathione-S-transferase activity), cholinergic deficits seen by increased neural acetylcholinesterase (AChE) expression and elevated lactate dehydrogenase underlie behavioural alterations. Furthermore, evidences of proteolysis were seen by reduced Nissl profiles in neuronal axons and dendrites which correspond to apoptotic changes observed in H&E staining of PFC and hippocampal sections. Interestingly, AA (100mg/kg daily for 15days) significantly attenuated behavioural deficits in rats through inhibition of molecular and cellular stressor proteins activated by AlCl3. Our results showed that the primary mechanisms underlying AA therapeutic advantages relates closely with its abilities to scavenge free radicals, prevent membrane lipid peroxidation, modulate neuronal bioenergetics, act as AChE inhibitor and through its anti-proteolytic properties. These findings suggest that supplementing endogenous AA capacity through its pharmacological intake may inhibit progression of AD-related neurodegenerative processes and behavioural alterations.
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Griffin M, Ibrahim A, Seifalian A, Butler P, Kalaskar D, Ferretti P. Chemical group-dependent plasma polymerisation preferentially directs adipose stem cell differentiation towards osteogenic or chondrogenic lineages. Acta Biomater 2017; 50:450-461. [PMID: 27956359 PMCID: PMC5331891 DOI: 10.1016/j.actbio.2016.12.016] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Revised: 11/25/2016] [Accepted: 12/07/2016] [Indexed: 12/17/2022]
Abstract
Human adipose derived stem cells (ADSCs) are being explored for the repair of craniofacial defects due to their multi-differentiation potential and ease of isolation and expansion. Crucial to using ADSCs for craniofacial repair is the availability of materials with appropriate biomechanical properties that can support their differentiation into bone and cartilage. We tested the hypothesis that different modifications of chemical groups on the surface of a nanocomposite polymer could increase human ADSC adhesion and selectively enhance their osteogenic and chondrogenic differentiation. We show that the COOH modification significantly promoted initial cell adhesion and proliferation over 14 days compared to NH2 surfaces. Expression of focal adhesion kinase and vinculin was enhanced after plasma surface polymerisation at 24 h. The COOH modification significantly enhanced chondrogenic differentiation as indicated by up-regulation of aggrecan and collagen II transcripts. In contrast, NH2 group functionalised scaffolds promoted osteogenic differentiation with significantly enhanced expression of collagen I, alkaline phosphatase and osteocalcin both at the gene and protein level. Finally, chorioallantoic membrane grafting demonstrated that both NH2 and COOH functionalised scaffolds seeded with ADSCs were biocompatible and supported vessel ingrowth apparently to a greater degree than unmodified scaffolds. In summary, our study shows the ability to direct ADSC chondrogenic and osteogenic differentiation by deposition of different chemical groups through plasma surface polymerisation. Hence this approach could be used to selectively enhance bone or cartilage formation before implantation in vivo to repair skeletal defects. Statement of Significance Human adipose derived stem cells (hADSCs) are an exciting stem cell source for regenerative medicine due to their plentiful supply and ease of isolation. However, the optimal environmental cues to direct stem cells towards certain lineages change have to has not been identified. We have shown that by modifying the surface of the scaffold with specific chemical groups using plasma surface polymerisation techniques we can control ADSCs differentiation. This study shows that ADSCs can be differentiated towards osteogenic and chondrogenic lineages on amine (NH2) and carboxyl (COOH) modified scaffolds respectively. Plasma polymerisation can be easily applied to other biomaterial surfaces to direct stem cell differentiation for the regeneration of bone and cartilage.
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Hassan A, Ibrahim A, Fawzy A, Abdel-Hafez M, El-Sherbeny W, Mostafa T. 240 Serum-Seminal HCV Viral Load Relationship in Chronic Seropositive Patients. J Sex Med 2017. [DOI: 10.1016/j.jsxm.2016.11.154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Pierrel J, Ibrahim A, Croutxé-Barghorn C, Allonas X. Effect of the oxygen affected layer in multilayered photopolymers. Polym Chem 2017. [DOI: 10.1039/c7py00974g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Photopolymerization is known to be limited in depth by light absorption.
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Ayyuba R, Mohammed AD, Salisu I, Nagoma AU, Owolabi LF, Ibrahim A. An analysis of postdural puncture headache in obstetric patients: A study from Kano, Nigeria. TROPICAL JOURNAL OF OBSTETRICS AND GYNAECOLOGY 2017. [DOI: 10.4103/tjog.tjog_61_16] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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