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Sadeghi B, Al-Hashmi S, Hassan Z, Hassan M. Dynamics of Donor T Cell Activation During Early Phase of Graft Versus Host Disease (GVHD): Donor Antigen Presenting Cells Can Activate Allogeneic T Cells. Biol Blood Marrow Transplant 2011. [DOI: 10.1016/j.bbmt.2010.12.571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Howarth FC, Qureshi MA, Hassan Z, Al Kury LT, Isaev D, Parekh K, Yammahi SRKD, Oz M, Adrian TE, Adeghate E. Changing pattern of gene expression is associated with ventricular myocyte dysfunction and altered mechanisms of Ca2+ signalling in young type 2 Zucker diabetic fatty rat heart. Exp Physiol 2011; 96:325-37. [PMID: 21216827 DOI: 10.1113/expphysiol.2010.055574] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The association between type 2 diabetes and obesity is very strong, and cardiovascular complications are the major cause of morbidity and mortality in diabetic patients. The aim of this study was to investigate early changes in the pattern of genes encoding cardiac muscle regulatory proteins and associated changes in ventricular myocyte contraction and Ca(2+) transport in young (9- to 13-week-old) type 2 Zucker diabetic fatty (ZDF) rats. The amplitude of myocyte shortening was unaltered; however, time-to-peak shortening and time to half-relaxation of shortening were prolonged in ZDF myocytes (163 ± 5 and 127 ± 7 ms, respectively) compared with age-matched control rats (136 ± 5 and 103 ± 4 ms, respectively). The amplitude of the Ca(2+) transient was unaltered; however, time-to-peak Ca(2+) transient was prolonged in ZDF myocytes (66.9 ± 2.6 ms) compared with control myocytes (57.6 ± 2.3 ms). The L-type Ca(2+) current was reduced, and inactivation was prolonged over a range of test potentials in ZDF myocytes. At 0 mV, the density of L-type Ca(2+) current was 1.19 ± 0.28 pA pF(-1) in ZDF myocytes compared with 2.42 ± 0.40 pA pF(-1) in control myocytes. Sarcoplasmic reticulum Ca(2+) content, release and uptake and myofilament sensitivity to Ca(2+) were unaltered in ZDF myocytes compared with control myocytes. Expression of genes encoding various L-type Ca(2+) channel proteins (Cacna1c, Cacna1g, Cacna1h and Cacna2d1) and cardiac muscle proteins (Myh7) were upregulated, and genes encoding intracellular Ca(2+) transport regulatory proteins (Atp2a2 and Calm1) and some cardiac muscle proteins (Myh6, Myl2, Actc1, Tnni3, Tnn2, and Tnnc1) were downregulated in ZDF heart compared with control heart. A change in the expression of genes encoding myosin heavy chain and L-type Ca(2+) channel proteins might partly underlie alterations in the time course of contraction and Ca(2+) transients in ventricular myocytes from ZDF rats.
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Rose A, Hassan Z, Davenport K, Evans N, Falder S. Adherence to National Burn Care Review referral criteria in a paediatric Emergency Department. Burns 2010; 36:1165-71. [DOI: 10.1016/j.burns.2010.03.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2009] [Revised: 02/28/2010] [Accepted: 03/05/2010] [Indexed: 11/25/2022]
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Mooney JS, Yates A, Sellar L, Shipway T, Roberts C, Parris R, Hassan Z, Thomas M, Smith M, Lecky F. Emergency head injury imaging: implementing NICE 2007 in a tertiary neurosciences centre and a busy district general hospital. Emerg Med J 2010; 28:778-82. [DOI: 10.1136/emj.2009.083360] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Suali E, Abdul Bari H, Hassan Z, Rahman M. The Study of Glycolic Acid Ethoxylate 4-nonylphenyl Ether on Drag Reduction. ACTA ACUST UNITED AC 2010. [DOI: 10.3923/jas.2010.2683.2687] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Ng SS, Lee SC, Bakhori SKM, Hassan Z, Abu Hassan H, Yakovlev VA, Novikova NN, Vinogradov EA. Surface phonon polariton characteristics of In(0.04)Al(0.06)Ga(0.90)N/AlN/Al(2)O(3) heterostructure. OPTICS EXPRESS 2010; 18:10354-10359. [PMID: 20588890 DOI: 10.1364/oe.18.010354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Surface phonon polariton (SPP) characteristics of In(0.04)Al(0.06)Ga(0.90)N/AlN/Al(2)O(3) heterostructure are investigated by means of p-polarized infrared (IR) attenuated total reflection spectroscopy. Two absorption dips corresponding to In(0.04)Al(0.06)Ga(0.90)N SPP modes are observed. In addition, two prominent dips and one relatively weak and broad dip corresponding to the Al(2)O(3) SPP mode, In(0.04)Al(0.06)Ga(0.90)N/Al(2)O(3) interface mode, and Al(2)O(3) bulk polariton mode, respectively, are clearly seen. No surface mode feature originating from the AlN layer is observed because it is too thin. Overall, the observations are in good agreement with the theoretical predictions.
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Raof NHA, Ng SS, Hassan HA, Hassan Z, Yahya AK, Alam S. Kramers-Kronig Analysis of Infrared Reflectance Spectra for Quaternary In[sub x]Al[sub y]Ga[sub 1−x−y]N Alloy. AIP CONFERENCE PROCEEDINGS 2010. [DOI: 10.1063/1.3469673] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Harmon RL, Mian MAH, Alam B, Hassan Z, Mullins RF. Burn Functional Outcomes - Ventilator Usage and Discharge Ambulation Status of Patients in a Burn Wound in-Patient Centre. ANNALS OF BURNS AND FIRE DISASTERS 2009; 22:200-202. [PMID: 21991182 PMCID: PMC3188176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 05/22/2009] [Indexed: 05/31/2023]
Abstract
Anticipating functional outcomes of patients managed in an in-patient burn wound centre can help in advising patients and their families of prognosis as well as assist case managers in discharge planning. The records of 37 burn patients were reviewed; one patient expired and was removed from further analysis. Data were obtained regarding patient characteristics, types and locations of burns and other wounds, ventilator use, level of mobility at hospital discharge, and disposition; three patients lacked discharge ambulation status and were removed from the outcome comparison analysis. Of the 36 patients, 17 had thermal burns and nine (25%) had associated inhalation injuries. Thermal burn patients (p = 0.02), patients requiring ventilator support during their hospital stay (p = 0.04), and those with inhalation injuries (p = 0.04) were less likely to be ambulating independently or with assistance at discharge from the burn wound centre than other patients. This preliminary study suggests that patients with thermal burns and inhalation injuries and those requiring ventilator support were less likely to be ambulatory at hospital discharge. Further studies appear indicated.
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Rose A, Hassan Z, Davenport K, Falder S. Adherence to national burn care review referral criteria in a paediatric emergency department. Burns 2009. [DOI: 10.1016/j.burns.2009.06.024] [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]
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Agaba PA, Sule HM, Ojoh RO, Hassan Z, Apena L, Mu'azu MA, Badung B, Agbaji OO, Idoko JA, Kanki P. Presentation and survival of patients with AIDS-related Kaposi's sarcoma in Jos, Nigeria. Int J STD AIDS 2009; 20:410-3. [PMID: 19451327 DOI: 10.1258/ijsa.2008.008353] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
AIDS-related Kaposi's sarcoma (AIDS-KS) remains a significant cause of morbidity and mortality. We describe the pattern of presentation and survival in Jos, Nigeria. We identified 48 HIV-positive patients with AIDS-KS and matched them for age and sex with an equal number of HIV-positive patients without AIDS-KS. We compared their clinical, immunological, virological characteristics and survival. They were similar in age and body mass index profile but patients with AIDS-KS had more tuberculosis co-infection (P, 0.02), lower median CD4 count (P, 0.003) and higher mortality (P, 0.002). Surprisingly, patients with AIDS-KS had lower levels of median viral load (29,347 copies/mL) compared with controls (80,533 copies/mL). We recommend specific AIDS-KS therapy in addition to highly active antiretroviral therapy in order to improve survival.
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Hassan Z, Wahsheh M. P225 Hepatitis knowledge and attitudes among Jordanian students at health related schools. Int J Antimicrob Agents 2009. [DOI: 10.1016/s0924-8579(09)70444-3] [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]
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Agaba P, Anya E, Hassan Z, Apena L, Agbaji O, Mua'Zu M, Badung B, Idoko J. Four year survival in untreated AIDS related-Kaposi sarcoma (AIDS-KS) in Jos, Nigeria. Infect Agent Cancer 2009. [PMCID: PMC4261798 DOI: 10.1186/1750-9378-4-s2-p3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Karlsson H, Nava S, Remberger M, Hassan Z, Hassan M, Ringden O. N-acetyl-L-Cysteine Promotes T Cell Mediated Immunity In Allogeneic Settings IN VIVO And IN VITRO. Biol Blood Marrow Transplant 2009. [DOI: 10.1016/j.bbmt.2008.12.390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Olsson R, Remberger M, Mattsson J, Hassan Z, Ringden O. GVHD Prophylaxis Using Low-Dose Cyclosporine is Safe and Reduces the Risk of Relapse and Death in Leukemic Recipients of HLA-Identical Sibling Transplants. Biol Blood Marrow Transplant 2009. [DOI: 10.1016/j.bbmt.2008.12.183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Raof NHA, Ng SS, Hassan HA, Hassan Z, Rusop M, Soga T. The Study of Energy Band Gap of In[sub x]Al[sub y]Ga[sub 1−x−y]N Quaternary Alloys using UV-VIS Spectroscopy. AIP CONFERENCE PROCEEDINGS 2009. [DOI: 10.1063/1.3160125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Hauzenberger D, Schaffer M, Ringdén O, Hassan Z, Omazic B, Mattsson J, Wikström AC, Remberger M. Outcome of haematopoietic stem cell transplantation in patients transplanted with matched unrelated donorsvsallele-mismatched donors: a single centre study. ACTA ACUST UNITED AC 2008; 72:549-58. [DOI: 10.1111/j.1399-0039.2008.01148.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Bari HA, Suali E, Hassan Z. Glycolic Acid Ethoxylate Lauryl Ether Performance as Drag Reducing Agent in Aqueous Media Flow in Pipelines. ACTA ACUST UNITED AC 2008. [DOI: 10.3923/jas.2008.4410.4415] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Hassan Z, Mullins RF, Alam B, Mian MAH. Carpal tunnel syndrome following burns. ANNALS OF BURNS AND FIRE DISASTERS 2008; 21:153-155. [PMID: 21991129 PMCID: PMC3188166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 02/15/2008] [Indexed: 05/31/2023]
Abstract
The commonest cause of carpal tunnel syndrome (CTS) is a congenital predisposition - the carpal tunnel is simply narrower in some people than in others. The development of CTS due to various burn causes has never been reported. This study describes some demographic features of all reported CTS cases following different types of burn in patients admitted to our burns centre in the USA. A retrospective case study was carried out to identify CTS following different types of burns among the patients admitted between January 2001 and January 2006. A descriptive data analysis was carried out to observe CTS following hand burns. There were 36 CTS cases in 28 patients presenting various kinds of burns in the upper extremities. The mean age of the CTS patients was 52 years (SD, 10.51 yr) and 79% were male. Of these, 57% had sustained thermal burns, 32% electrical burns, and the remainder had scalds or chemical burns. More patients (56%) had second-degree burns than third-degree burns and all but one of the patients with electrical burns had second-degree burns. This observation demonstrates that there were a considerable number of CTS cases following thermal burn injury compared to previous reporting. This study also suggests the need of a prospective study to examine the association between burns in the upper extremities and the likelihood of their progression to CTS and whether any specific type of burn is more likely to result in CTS.
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Sadeghi B, Aghdami N, Hassan Z, Forouzanfar M, Rozell B, Abedi-Valugerdi M, Hassan M. GVHD after chemotherapy conditioning in allogeneic transplanted mice. Bone Marrow Transplant 2008; 42:807-18. [DOI: 10.1038/bmt.2008.261] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Sadeghi B, Jansson M, Hassan Z, Mints M, Hägglund H, Abedi-Valugerdi M, Hassan M. The effect of administration order of BU and CY on engraftment and toxicity in HSCT mouse model. Bone Marrow Transplant 2008; 41:895-904. [PMID: 18223695 DOI: 10.1038/sj.bmt.1705996] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Conditioning regimens are an important issue determining the outcome of hematopoietic stem cell transplantation (HSCT). Less toxicity, early engraftment and no relapse are the aims of efficient conditioning. Our objective was to investigate the long-term effects of BU-CY and their administration order on the toxicity and chimerism in a mouse model of HSCT. Female BALB/c mice were treated with either BU (15 mg/kg/day x 4)-CY (100 mg/kg/day x 2) or CY-BU. Treated mice were transplanted with Sca-1+ cells from male BALB/c mice. Until 90 days after HSCT, the animals were monitored for body weight and analyzed for cellular phenotype of the thymus, spleen and BM, total chimerism, the spleen chimerism of DCs and T regulatory (Treg) cells, and hepatotoxicity. BU-CY and CY-BU treatments exerted comparable myeloablative and immunosuppressive effects. The long-term engraftment of donor cells in the BM and thymus regeneration showed the same features in both groups. However, the two regimens differed; in general, hepatotoxicity and chimerism of DC and Treg cells. In the long term, BU-CY, but not CY-BU caused a marked decrease in body weight and a significant increase in the activities of the liver enzymes, particularly aspartate amino transferase (AST). We conclude that the alteration of the administration order of BU-CY to CY-BU not only gives the same level of engraftment but also reduces the toxicity of the conditioning regimen that might be valuable specially in young patients who are undergoing HSCT.
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Remberger M, Mattsson J, Hassan Z, Karlsson N, LeBlanc K, Omazic B, Okas M, Sairafi D, Ringdén O. Risk factors for acute graft-versus-host disease grades II-IV after reduced intensity conditioning allogeneic stem cell transplantation with unrelated donors: a single centre study. Bone Marrow Transplant 2007; 41:399-405. [PMID: 17982493 DOI: 10.1038/sj.bmt.1705913] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
We analysed factors associated with moderate to severe acute GVHD in 111 patients treated with fludarabin-based reduced intensity conditioning (RIC) and allogeneic haematopoietic stem cell transplantation (HSCT). Most patients had a haematological malignancy. Donors were 97 HLA-A, -B and -DRbeta1 identical unrelated and 14 HLA-A, -B or -DRbeta1 allele mismatched unrelated donors. In the univariate analysis, we found ten factors associated with acute GVHD. These were diagnosis (P=0.06), GVHD prophylaxis with combinations other than CsA+MTX (P=0.006), graft nucleated (P<0.001) and CD34 (P<0.001) cell-dose, bidirectional ABO mismatch (P=0.001), conditioning (P=0.002), hospital vs home-care (P=0.06), ATG dose (P<0.001), donor herpes virus serology (P=0.07) and an immunized female donor to male recipient (P=0.05). In the multivariate analysis, three factors remained significant: a high CD34 cell dose (P<0.001), low dose (4 mg/kg) ATG (P<0.001), and an immunized female donor to male recipient (P<0.01). Patients receiving a CD34 cell dose > or =17.0 x 10(6) per kg had a higher incidence of GVHD, 53.7%, compared to 22.3% in patients receiving a lower dose (P=0.002). In patients without any of these risk factors (n=70), the incidence of acute GVHD was 14.1%, while it was 38.0 and 85.0% in patients with one (n=29) or two (n=10) risk factors (P<0.001). We concluded that risk factors for acute GVHD using RIC are similar as using myeloablative conditioning.
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Kumarasamy V, Chua SK, Hassan Z, Wahab AHA, Chem YK, Mohamad M, Chua KB. Evaluating the sensitivity of a commercial dengue NS1 antigen-capture ELISA for early diagnosis of acute dengue virus infection. Singapore Med J 2007; 48:669-73. [PMID: 17609831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
INTRODUCTION The aim of this report is to establish an accurate diagnosis of acute dengue virus infection early, in order to provide timely information for the management of patients and early public health control of dengue outbreak. METHODS 224 serum samples from patients with a clinical diagnosis of acute dengue infection, which were subsequently confirmed by laboratory tests, were used to evaluate the performance of a commercially-available dengue NS1 antigen-capture ELISA kit. RESULTS The dengue NS1 antigen-capture ELISA gave an overall sensitivity rate of 93.3 percent (209/224). The sensitivity rate was significantly higher in acute primary dengue (97.4 percent) than in acute secondary dengue (68.8 percent). In comparison, the virus isolation gave an overall positive isolation rate of 64.7 percent, with a positive rate of 70.8 percent and 28.1 percent, for acute primary dengue and acute secondary dengue, respectively. Molecular detection of dengue RNA by RT-PCR gave an overall positive detection rate of 63.4 percent, with a positive rate of 62.5 percent and 68.8 percent, for acute primary dengue and acute secondary dengue, respectively. Of the 224 acute serum samples from patients with laboratory-confirmed acute dengue infection, dengue IgM was detected in 88 specimens, comprising 68 acute primary dengue specimens and 20 acute secondary dengue specimens. NS1 antigen-capture ELISA kit gave an overall sensitivity rate of 88.6 percent in the presence of anti-dengue IgM and 96.3 percent in the absence of anti-dengue IgM. CONCLUSION Of the 224 acute serum samples, the sample ages of 166 acute serum samples are known. The positive detection rate of dengue NS1 antigen-capture ELISA, on the whole, was higher than the other three established diagnostic test methods for laboratory diagnosis of acute dengue infection.
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Thahab SM, Hassan HA, Hassan Z. Performance and optical characteristic of InGaN MQWs laser diodes. OPTICS EXPRESS 2007; 15:2380-2390. [PMID: 19532475 DOI: 10.1364/oe.15.002380] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The performance of the InGaN multi-quantum wells (MQWs) laser diode structures has been numerically investigated by using ISE TCAD software. We investigated the effect of well numbers, barrier thickness and barrier doping on the output power, threshold current, and slope efficiency. All material parameters used in the model are evaluated based on the recent literature values. We observed the maximum output power and lower threshold current when the well number was two. Effective change in the output power and threshold current was observed with the variations in barriers thickness and doping level. Our results are in agreement with the experimental results observed by [S. Nakamura et al. Jpn. J. Appl. Phys. Part 2, 37, L1020 (1998) and S. Nakamura et al. Appl. Phys. Lett. 76, 22 (2000)].
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Soleimanjahi H, Hassan Z, Poorpak Z, Meshkat Z, Mirshahabi H, Meshkat M. P1085 Administration of DNA vaccine containing E6 gene of HPV16 in order to evaluate cellular immunity. Int J Antimicrob Agents 2007. [DOI: 10.1016/s0924-8579(07)70925-1] [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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