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Rahman MM, Islam NA, Islam MS, Rahman MM, Alam MT, Islam MA, Sarker ZH, Islam S. Management of Post Traumatic Kyphotic Deformity in Thoracolumbar Spine: Conservative versus Operative Treatment. Mymensingh Med J 2018; 27:715-722. [PMID: 30487485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Local post traumatic kyphosis may impair spinal sagittal balance and result in seven disability and programmed neurological deficit. In operative group the mean±SD fracture kyphosis was 34.21±3.7 at the time of admission and mean±SD kyphosis was 17.64±3.20 at the time of final follow up. In conservative group the mean±SD kyphosis was 32.96±4.06 at the time of admission and mean±SD kyphosis was 40.28±4.72 at the time of final follow up. It is interesting to note that in conservative group kyphosis increased (7.3) during final follow up but decreased (16.57) in operative group during final follow up due to spinal instrumentation and post-lateral fusion. Local post traumatic kyphosis may impair spinal sagittal balance and result in severe disability and progressive neurological deficit. Objective of the study is to find out the better option in the management of post traumatic kyphotic deformity in thoracolumbar Spain injury. The quasi-experimental study was carried out at the National Institute of Traumatology & Orthopedic Rehabilitation (NITOR), Dhaka, Bangladesh from January 2006 to December 2008. A total number of 40 patients with post traumatic thoracolumbar spine injuries with kyphotic deformity selected purposively. Out of 40 cases 1 patient missed from final follow up. Rest of 39 patients was included in this study. All patients were admitted within 3 weeks of injury. Most were referred from peripheral hospital & some were admitted in emergency and outpatient department of NITOR. Among those 25 patients were conservatively treated and 14 were operatively treated. In operative group the mean±SD fracture kyphosis was 34.21±3.7 at the time of admission and mean±SD kyphosis was 17.64±3.20 at the time of final follow up. In conservative group the mean±SD kyphosis was 32.96±4.06 at the time of admission and mean±SD kyphosis was 40.28±4.72 at the time of final follow up. It is to note that in conservative group kyphosis increased (7.3) during final follow up but decreased (16.57) in operative group during final follow up due to spinal instrumentation and post-lateral fusion.
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Reza-Ul-Haq KM, Hanif MA, Tabassum R, Ahmed S, Islam MS, Naher S, Asha MT, Islam S, Siddiqui AI. Comparative Study between Conventional Method and Endonasal Endoscopic Resection of Juvenile Nasopharyngeal Angiofibroma. Mymensingh Med J 2018; 27:785-792. [PMID: 30487495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Juvenile Nasopharyngeal Angiofibroma (JNA) is an uncommon, benign and extremely vascular tumour which accounts for 0.05-0.5% of all head and neck tumours. Now a day, endoscopic excision is a preferred surgery for early cases. This study was done with the aim to compare the outcomes and complications between endoscopic and conventional surgery of JNA. This cross sectional observational study was conducted in the Department of Otolaryngology & Head-Neck Surgery at Mymensingh Medical College Hospital, Mymensingh and Bangabandhu Sheikh Mujib Medical University, Dhaka from 8 March 2014 to 7 March, 2015. A total number of 20 cases were purposively selected and patient with intracranial extension were excluded from the study. Data was analyzed with SPSS software. Among the 20 patients, maximum 18(90%) were in 2nd decade, age was ranging from 11-33 years, mean 16.17 years. Maximum patients 13(65%) came with nasal obstruction and epistaxis and majority 13(65%) of them were in stage II. Endoscopic excision was done in 12(60%) cases and conventional surgery was done in 7(35%) cases. Mean hospital stay of endoscopic and conventional group was 4.62 vs. 10.23 days. Mean blood loss and mean operative time were 528.12ml vs. 1050ml and 2 hours 17 minutes vs. 3 hours 28 minutes respectively. Per-operative and postoperative complication were more (53.85%) in conventional surgery group. Endoscopic excision of nasopharyngeal angiofibroma is more preferable due to less operative time, less hospital stay, less per-operative blood loss and less complications. But in advanced cases conventional surgery and combined surgery is preferred.
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Islam S, Mackie A, Kaul P, Tran D. HEALTHCARE RESOURCE UTILIZATION AMONG CHILDREN WITH CONGENITAL HEART DISEASE: A POPULATION-BASED STUDY. Can J Cardiol 2018. [DOI: 10.1016/j.cjca.2018.07.335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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Islam S, Talukder S, Ferdous J, Hasan MM, Sarker YA, Sachi S, Alim MA, Sikder MH. IN-VITRO EFFICACY OF VERENDA (Ricinus communis) LEAVES EXTRACT AGAINST TICKS IN CATTLE. ACTA ACUST UNITED AC 2018. [DOI: 10.3329/bjvm.v16i1.37380] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Tick infestation is commonly found in every commercial cattle farm and domestically reared cattle. Farm generally used acaricides to treat tick infestation; however finding new, cheap and alternative source of acaricides is a prime concern. Here, we investigated the in-vitro efficacy of verenda (Ricinus communis) leaves extracts to treat tick infestation. We prepared aqueous, methanolic and ethanolic extract of verenda leaves to apply on ticks. A total of 90 ticks (both hard ticks and soft ticks) was collected from cattle in local area of Mymensingh region and divided into 3 treatment groups: A (aqueous), B (ethanol), C (methanol) and D (control). All groups were sub-divided into 3 sub-groups on the basis of concentration of 1%, 2% and 3% treatments. Ticks were treated with different concentration of extract and observation of tick was performed 12, 24 and 36 hours interval. The whole experiment was repeated thrice. Our data suggests 3% methanolic extract confer highest efficacy against ticks and verenda leaves extract could be used alternatively as acaricides.
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Bi G, Wu L, Huang P, Islam S, Heruth DP, Zhang LQ, Li DY, Sampath V, Huang W, Simon BA, Easley RB, Ye SQ. Up-regulation of SFTPB expression and attenuation of acute lung injury by pulmonary epithelial cell-specific NAMPT knockdown. FASEB J 2018; 32:3583-3596. [PMID: 29452569 PMCID: PMC5998971 DOI: 10.1096/fj.201701059r] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 01/22/2018] [Indexed: 12/11/2022]
Abstract
Although a deficiency of surfactant protein B (SFTPB) has been associated with lung injury, SFTPB expression has not yet been linked with nicotinamide phosphoribosyltransferase (NAMPT), a potential biomarker of acute lung injury (ALI). The effects of Nampt in the pulmonary epithelial cell on both SFTPB expression and lung inflammation were investigated in a LPS-induced ALI mouse model. Pulmonary epithelial cell-specific knockdown of Nampt gene expression, achieved by the crossing of Nampt gene exon 2 floxed mice with mice expressing epithelial-specific transgene Cre or by the use of epithelial-specific expression of anti-Nampt antibody cDNA, significantly attenuated LPS-induced ALI. Knockdown of Nampt expression was accompanied by lower levels of bronchoalveolar lavage (BAL) neutrophil infiltrates, total protein and TNF-α levels, as well as lower lung injury scores. Notably, Nampt knockdown was also associated with significantly increased BAL SFTPB levels relative to the wild-type control mice. Down-regulation of NAMPT increased the expression of SFTPB and rescued TNF-α-induced inhibition of SFTPB, whereas overexpression of NAMPT inhibited SFTPB expression in both H441 and A549 cells. Inhibition of NAMPT up-regulated SFTPB expression by enhancing histone acetylation to increase its transcription. Additional data indicated that these effects were mainly mediated by NAMPT nonenzymatic function via the JNK pathway. This study shows that pulmonary epithelial cell-specific knockdown of NAMPT expression attenuated ALI, in part, via up-regulation of SFTPB expression. Thus, epithelial cell-specific knockdown of Nampt may be a potential new and viable therapeutic modality to ALI.-Bi, G., Wu, L., Huang, P., Islam, S., Heruth, D. P., Zhang, L. Q., Li, D.-Y., Sampath, V., Huang, W., Simon, B. A., Easley, R. B., Ye, S. Q. Up-regulation of SFTPB expression and attenuation of acute lung injury by pulmonary epithelial cell-specific NAMPT knockdown.
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Nahar S, Islam S, Khandaker S, Nasreen W, Hoque O, Dewan I. Formulation and Evaluation of Metoprolol Tartrate Loaded Niosomes Using 23 Factorial Design. JOURNAL OF PHARMACEUTICAL RESEARCH INTERNATIONAL 2018. [DOI: 10.9734/jpri/2018/42068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Arora N, Caldwell A, Wafa K, Szczesniak A, Caldwell M, Al-Banna N, Sharawy N, Islam S, Zhou J, Holbein BE, Kelly MEM, Lehmann C. DIBI, a polymeric hydroxypyridinone iron chelator, reduces ocular inflammation in local and systemic endotoxin-induced uveitis. Clin Hemorheol Microcirc 2018; 69:153-164. [PMID: 29630535 DOI: 10.3233/ch-189109] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
BACKGROUND/OBJECTIVE Non-infectious uveitis is an inflammatory disease of the eye commonly treated by corticosteroids, though important side effects may result. A main mediator of inflammation are oxygen free radicals generated in iron-dependent pathways. As such, we investigated the efficacy of a novel iron chelator, DIBI, as an anti-inflammatory agent in local and systemic models of endotoxin induced uveitis (EIU). METHODS Firstly, the effects of DIBI in systemic EIU in Lewis rats were established. 2 hours post intravenous LPS or LPS/DIBI injections, leukocyte activation and functional capillary density (FCD) were examined using intravital microscopy (IVM) of the iridial microcirculation. Secondly, the toxicity of DIBI was evaluated in BALB/C mice for both acute and chronic dosages through gross ocular examination, intraocular pressure measurements and hematoxylin-eosin staining of ocular tissue. Lastly, three groups of BALB/C mice, control, LPS or DIBI + LPS, were studied to evaluate the effectiveness of DIBI in treating local EIU. Five hours post-local intravitreal (i.v) injection, leukocyte activation and capillary density were examined via IVM. RESULTS Treatment of systemic EIU with DIBI resulted in a reduction of leukocyte activation and FCD improvement within the iridial microcirculation. Toxicity studies suggested that acute and chronic DIBI administration had no adverse effects in the eye. In the local EIU model, DIBI was shown to reduce leukocyte activation and restored the FCD/DCD ratio, providing evidence for its anti-inflammatory properties. CONCLUSIONS Our study has provided evidence that DIBI has anti-inflammatory effects in experimental uveitis. Additionally, no local ocular toxicity was observed.
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Timsina J, Wolf J, Guilpart N, van Bussel L, Grassini P, van Wart J, Hossain A, Rashid H, Islam S, van Ittersum M. Can Bangladesh produce enough cereals to meet future demand? AGRICULTURAL SYSTEMS 2018; 163:36-44. [PMID: 29861535 PMCID: PMC5903259 DOI: 10.1016/j.agsy.2016.11.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Bangladesh faces huge challenges in achieving food security due to its high population, diet changes, and limited room for expanding cropland and cropping intensity. The objective of this study is to assess the degree to which Bangladesh can be self-sufficient in terms of domestic maize, rice and wheat production by the years 2030 and 2050 by closing the existing gap (Yg) between yield potential (Yp) and actual farm yield (Ya), accounting for possible changes in cropland area. Yield potential and yield gaps were calculated for the three crops using well-validated crop models and site-specific weather, management and soil data, and upscaled to the whole country. We assessed potential grain production in the years 2030 and 2050 for six land use change scenarios (general decrease in arable land; declining ground water tables in the north; cropping of fallow areas in the south; effect of sea level rise; increased cropping intensity; and larger share of cash crops) and three levels of Yg closure (1: no yield increase; 2: Yg closure at a level equivalent to 50% (50% Yg closure); 3: Yg closure to a level of 85% of Yp (irrigated crops) and 80% of water-limited yield potential or Yw (rainfed crops) (full Yg closure)). In addition, changes in demand with low and high population growth rates, and substitution of rice by maize in future diets were also examined. Total aggregated demand of the three cereals (in milled rice equivalents) in 2030 and 2050, based on the UN median population variant, is projected to be 21 and 24% higher than in 2010. Current Yg represent 50% (irrigated rice), 48-63% (rainfed rice), 49% (irrigated wheat), 40% (rainfed wheat), 46% (irrigated maize), and 44% (rainfed maize) of their Yp or Yw. With 50% Yg closure and for various land use changes, self-sufficiency ratio will be > 1 for rice in 2030 and about one in 2050 but well below one for maize and wheat in both 2030 and 2050. With full Yg closure, self-sufficiency ratios will be well above one for rice and all three cereals jointly but below one for maize and wheat for all scenarios, except for the scenario with drastic decrease in boro rice area to allow for area expansion for cash crops. Full Yg closure of all cereals is needed to compensate for area decreases and demand increases, and then even some maize and large amounts of wheat imports will be required to satisfy demand in future. The results of this analysis have important implications for Bangladesh and other countries with high population growth rate, shrinking arable land due to rapid urbanization, and highly vulnerable to climate change.
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Nathavitharana RR, Daru P, Barrera AE, Mostofa Kamal SM, Islam S, Ul-Alam M, Sultana R, Rahman M, Hossain MS, Lederer P, Hurwitz S, Chakraborty K, Kak N, Tierney DB, Nardell E. FAST implementation in Bangladesh: high frequency of unsuspected tuberculosis justifies challenges of scale-up. Int J Tuberc Lung Dis 2018; 21:1020-1025. [PMID: 28826452 DOI: 10.5588/ijtld.16.0794] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
SETTING National Institute of Diseases of the Chest and Hospital, Dhaka; Bangladesh Institute of Research and Rehabilitation in Diabetes, Endocrine and Metabolic Disorders, Dhaka; and Chittagong Chest Disease Hospital, Chittagong, Bangladesh. OBJECTIVE To present operational data and discuss the challenges of implementing FAST (Find cases Actively, Separate safely and Treat effectively) as a tuberculosis (TB) transmission control strategy. DESIGN FAST was implemented sequentially at three hospitals. RESULTS Using Xpert® MTB/RIF, 733/6028 (12.2%, 95%CI 11.4-13.0) patients were diagnosed with unsuspected TB. Patients with a history of TB who were admitted with other lung diseases had more than twice the odds of being diagnosed with unsuspected TB as those with no history of TB (OR 2.6, 95%CI 2.2-3.0, P < 0.001). Unsuspected multidrug-resistant TB (MDR-TB) was diagnosed in 89/1415 patients (6.3%, 95%CI 5.1-7.7). Patients with unsuspected TB had nearly five times the odds of being diagnosed with MDR-TB than those admitted with a known TB diagnosis (OR 4.9, 95%CI 3.1-7.6, P < 0.001). Implementation challenges include staff shortages, diagnostic failure, supply-chain issues and reliance on external funding. CONCLUSION FAST implementation revealed a high frequency of unsuspected TB in hospitalized patients in Bangladesh. Patients with a previous history of TB have an increased risk of being diagnosed with unsuspected TB. Ensuring financial resources, stakeholder engagement and laboratory capacity are important for sustainability and scalability.
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Rahman A, Islam S. 2.3-O5Involve everyone! Developing a community engagement policy for research in an ethnically diverse city. Eur J Public Health 2018. [DOI: 10.1093/eurpub/cky047.058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Chowdhury M, Iqbal M, Roy D, Alam K, Faroque M, Shaha M, Hossain RM, Islam S, Iqbal S. SP313PREVALENCE OF CARDIO-RENAL RISK FACTORS IN URBAN & RURAL POPULATION - FINDINGS FROM A SCREENING PROGRAM IN BANGLADESH (BAN-CARE). Nephrol Dial Transplant 2018. [DOI: 10.1093/ndt/gfy104.sp313] [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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Yang T, Rahman A, Islam S, Dogra S. 6.7-W1The Born in Bradford cohorts: conducting research in a multi-ethnic setting. Eur J Public Health 2018. [DOI: 10.1093/eurpub/cky049.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Cai AW, Islam S, Hankins SR, Fischer W, Eisen HJ. Mechanical Circulatory Support in the Treatment of Advanced Heart Failure. Am J Transplant 2017; 17:3020-3032. [PMID: 28643428 DOI: 10.1111/ajt.14403] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2017] [Revised: 06/15/2017] [Accepted: 06/16/2017] [Indexed: 01/25/2023]
Abstract
According to the Centers for Disease Control, heart failure (HF) remains a pervasive condition with high morbidity and mortality, affecting 5.8 million people in the United States and 23 million worldwide. For patients with refractory end-stage HF, heart transplantation is the "gold standard" for definitive treatment. However, the demand for heart transplantation has consistently exceeded the availability of donor hearts, with approximately 2331 orthotopic heart transplantations performed in the United States in 2015 despite an estimated 100 000 to 250 000 patients with New York Heart Association class IIIB or IV symptoms that are refractory to medical treatment, making such patients potential transplant candidates. As such, the need for mechanical circulatory support (MCS) to treat patients with end-stage HF has become paramount. In this review, we focus on the history, advancements, and current use of durable MCS device therapy in the treatment of advanced heart failure.
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Pearce I, Islam S, McIntyre IG, O'Flynn KJ. Suspected Testicular Torsion: A Survey of Clinical Practice in North West England. J R Soc Med 2017; 95:247-9. [PMID: 11983766 PMCID: PMC1279678 DOI: 10.1177/014107680209500508] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Several aspects of the management of suspected testicular torsion are controversial. A questionnaire was mailed to all 33 consultant urologists in the North West region of England to elicit their policies for routine clinical management. 29 of 33 questionnaires were returned (2 incomplete). As regards radiological investigation, 4 consultants always request ultrasound examination; the others do not favour routine imaging. When the diagnosis of testicular torsion is confirmed at operation, all consultants would perform bilateral testicular fixation, although with considerable variations in technique; most use Vicryl sutures (66%) and three-point fixation (57%). One-third would do an ipsilateral orchidopexy if there was no clear evidence of testicular torsion at operation. The variation revealed by this survey prompted an attempt to formulate a protocol for management. A review of the published work indicates that, in cases of proven testicular torsion, treatment should include bilateral fixation with delayed-absorption or nonabsorbable sutures; fixation should be at three points. When torsion is not found at operation, there is no evidence of benefit from orchidopexy.
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Islam S, Nusrat F, Esha SA, Mehrin F, Hilaly A, Shiraji S, Hasan MI, Tofail F, Hamadani JD. How Does Family Structure Relate With Children's Language Development? A Cross Sectional Experience from Urban Slums in Dhaka. Mymensingh Med J 2017; 26:775-782. [PMID: 29208864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Family structure is an important factor for children's overall development. In this cross sectional study, we explored how single parenting relates to child's language development in slums of Dhaka city, Bangladesh from 31st August 2010 to 9th February 2011. Children aged 10 to 24 months (n=133), living with mother only and those living with both parents were included. Children's comprehensive and expressive language development was assessed using the Bengali version of Mac Arthur's Communicative Development Inventory (MCDI). Family care indicators (FCI) were used to assess quality of psychosocial stimulation at home, maternal depression was assessed using Centre for Epidemiological Studies - Depression (CES-D) questionnaire and socioeconomic status (SES) of the family was determined using a previously tested questionnaire. We analyzed the data using multivariate analysis. Maternal depression scores were higher in single mothers compared to those living with their husband and more depressed mothers provided less stimulating environment for the child. Children in the single parent families had lower scores on FCI and their comprehension and expression scores were slightly lower. Multiple regressions analysis showed that children's comprehension {B (95%CI), 0.19 (0.07, 0.32), p=0.003} and expression {0.18 (0.02, 0.35), p=0.032} scores were significantly higher in those living with both parents. Steps to educate parents on the importance of a healthy family life needs to be taken in order to ensure development of children to achieve their full potentials. Further long-term effects of living without father on children's development needs to be explored in Bangladesh.
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Nakagawa K, Ueda M, Itoh M, Hayakawa-Ogura M, Ana T, Islam S, Nakagawa T. Improvement of memory impairment by dietary quercetin supplementation through suppressing ATF4 expression in a murine model of early-stage Alzheimer’s disease with obesity and diabetes. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2156] [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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Al-Janabi F, Magee N, Islam S, Watson N, Mion M, Davies J, Karamasis G, Potter M, Keeble T. P3431Care after resuscitation - an early psychological support service for out of hospital cardiac arrest survivors. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p3431] [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: 11/12/2022] Open
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Khan MA, Ali K, Bonyah E, Okosun KO, Islam S, Khan A. Mathematical modeling and stability analysis of Pine Wilt Disease with optimal control. Sci Rep 2017; 7:3115. [PMID: 28596525 PMCID: PMC5465188 DOI: 10.1038/s41598-017-03179-w] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Accepted: 04/26/2017] [Indexed: 11/09/2022] Open
Abstract
This paper presents and examine a mathematical system of equations which describes the dynamics of pine wilt disease (PWD). Firstly, we examine the model with constant controls. Here, we investigate the disease equilibria and calculate the basic reproduction number of the disease. Secondly, we incorporate time dependent controls into the model and then analyze the conditions that are necessary for the disease to be controlled optimally. Finally, the numerical results for the model are presented.
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Ling M, Huang P, Islam S, Heruth DP, Li X, Zhang LQ, Li DY, Hu Z, Ye SQ. Epigenetic regulation of Runx2 transcription and osteoblast differentiation by nicotinamide phosphoribosyltransferase. Cell Biosci 2017; 7:27. [PMID: 28546856 PMCID: PMC5442704 DOI: 10.1186/s13578-017-0154-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Accepted: 05/16/2017] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Bone degenerative disorders like osteoporosis may be initiated by age-related shifts in anabolic and catabolic responses that control bone homeostasis. Although there are studies suggesting that metabolic changes occur with stem cell differentiation, the molecular mechanisms governing energy metabolism and epigenetic modification are not understood fully. Here we reported the key role of nicotinamide phosphoribosyltransferase (Nampt), which is the rate-limiting enzyme in the salvage pathway of NAD biosynthesis from nicotinamide, in the osteogenic differentiation of bone marrow stromal cells. RESULTS Differentiated bone marrow stromal cells isolated from Nampt+/- mice presented with diminished osteogenesis, as evaluated by alkaline phosphatase (ALP) staining, ALP activity and osteoblast-mediated mineralization, compared to cells from Nampt+/+ mice. Similar results were observed in differentiated Nampt-deficient C3H/10T1/2 and MC3T3-E1 cells. Further studies showed that Nampt promotes osteoblast differentiation through increased function and expression of Runx2 as tested by luciferase reporter assay, RT-PCR, and Western Blotting. Our data also demonstrated that Nampt regulates Runx2 transcription in part through epigenetic modification of H3-Lys9 acetylation. CONCLUSION Our study demonstrated that Nampt plays a critical role in osteoblast differentiation through epigenetic augmentation of Runx2 transcription. NAMPT may be a potential therapeutic target of aging-related osteoporosis.
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Karim AKMB, Joarder MA, Islam S, Akhter N, Orin M, Hossain J, Khaled A, Ahsan S, Joseph V, Nasir TA, Jahangir SM, Chandy MJ. Clinical Profile and Outcome of Intracranial Meningioma in Apollo Hospitals Dhaka. Pulse (Basel) 2017. [DOI: 10.3329/pulse.v9i1.31875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Background: A meningioma is a tumor that arises from the meninges- the membranes that surround the brain and spinal cord.Objective: This is a retrospective analysis of the recorded data of patients managed for intracranial meningiomas between January 2007 and June 2015 at Apollo Hospital, Dhaka.Methodology: Demographic data was analyzed for all but only patients who had surgery and histological diagnosis were analyzed for outcome.Results: This study shows that meningiomas had female preponderance. Majority cases were above 50 years of age. Convexity is the most common anatomical location of meningioma. Most common symptoms were headache (70%) followed by seizure in 34.3% of patients. 90% of the cases were benign. Malignant meningioma was 1.4% and recurrence was found in 1.4% of cases. Six patients with histological grades I, II and III meningi- omas were sent for stereotactic radiotherapy after incomplete tumor resection or for residual tumour. Total removal was done in 80% cases and the mortality was 1.4%, in patient who had poor GCS score on admission.Pulse Vol.9 January-December 2016 p.22-26
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Dugena O, Islam S, Hayter J. The rate of phrenic nerve injury following neck dissection for head and neck cancer and its impact on length of hospital stay. Int J Oral Maxillofac Surg 2017. [DOI: 10.1016/j.ijom.2017.02.954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Baadh A, Katz D, Islam S, Baadh P. Interventional radiology and the Sunshine Act: Two -year analysis of the open payments database and comparison with related specialties. J Vasc Interv Radiol 2017. [DOI: 10.1016/j.jvir.2016.12.978] [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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Arora N, Islam S, Wafa K, Zhou J, Toguri JT, Cerny V, Lehmann C. Evaluation of iris functional capillary density in experimental local and systemic inflammation. J Microsc 2017; 266:55-59. [PMID: 28102536 DOI: 10.1111/jmi.12518] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Revised: 07/09/2016] [Accepted: 11/29/2016] [Indexed: 11/30/2022]
Abstract
The ocular microcirculation represents an important target to treat inflammatory diseases of eye, where impairment of microvascular blood flow plays key role as, for example, in anterior uveitis. To evaluate novel interventions targeting the microcirculation, appropriate and reliable tools to study this particular microvascular bed are needed. Intravital microscopy (IVM) belongs to several methods allowing evaluation of microcirculation experimentally, even in small animals. The aim of our study was to examine the iridial microcirculation (IMIC) in uveitis induced by local or systemic endotoxin administration in rats and mice by IVM and to propose new parameters to quantify the changes within the IMIC. Systemic inflammation was induced in rats by intravenous endotoxin administration, control group received normal saline intravenously. Local inflammation was induced in mice by intravitreal endotoxin administration, the control group received normal saline intravitreally. IVM of IMIC was performed in animals receiving systemic endotoxin prior injection and 1 and 2 h afterwards, respectively, in animals receiving intravitreal endotoxin/saline prior local injection and 5 h afterwards. Obtained video recordings were analyzed off-line. Functional capillary density (FCD) and dysfunctional capillary density (DCD) were evaluated for description of IMIC, and calculation of FCD/DCD ratio was performed. In systemic inflammation, FCD was significantly decreased compared to control animals. In local inflammation, the number of functional capillaries in the IMIC was significantly reduced following the endotoxin challenge. Analysis of the DCD revealed a significant increase in capillaries with reduced perfusion after intravitreal endotoxin administration and right shift of the FCD/DCD ratio was observed after endotoxin local injection. Detecting and quantifying changes in IMIC during systemic or local inflammation in experimental animals by IVM was feasible. Therefore, IVM of the IMIC represents a valuable tool to evaluate and quantify inflammatory changes in experimental eye disease.
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Peters-Futre E, Naidu P, Stirk L, Islam S. A 5-wk endurance exercise programme affects glycaemic regulation in pre-diabetic, but not diabetic rats. J Sci Med Sport 2017. [DOI: 10.1016/j.jsams.2017.01.118] [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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Bateman J, Bougie O, Singh S, Islam S. Histomorphological changes in endometriosis in a patient treated with ulipristal: A case report. Pathol Res Pract 2017; 213:79-81. [DOI: 10.1016/j.prp.2016.10.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 10/02/2016] [Accepted: 10/21/2016] [Indexed: 01/27/2023]
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