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1.
J Biomed Sci ; 30(1): 60, 2023 Jul 31.
Artigo em Inglês | MEDLINE | ID: mdl-37525190

RESUMO

Dysregulation of various cells in the tumor microenvironment (TME) causes immunosuppressive functions and aggressive tumor growth. In combination with immune checkpoint blockade (ICB), epigenetic modification-targeted drugs are emerging as attractive cancer treatments. Lysine-specific demethylase 1 (LSD1) is a protein that modifies histone and non-histone proteins and is known to influence a wide variety of physiological processes. The dysfunction of LSD1 contributes to poor prognosis, poor patient survival, drug resistance, immunosuppression, etc., making it a potential epigenetic target for cancer therapy. This review examines how LSD1 modulates different cell behavior in TME and emphasizes the potential use of LSD1 inhibitors in combination with ICB therapy for future cancer research studies.


Assuntos
Neoplasias , Microambiente Tumoral , Humanos , Histonas/metabolismo , Neoplasias/tratamento farmacológico , Epigênese Genética , Histona Desmetilases/genética
2.
J Appl Microbiol ; 128(1): 280-291, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31563150

RESUMO

AIMS: To determine the composition and temporal stability of the gut (faecal) microbiota of sheep (Ovis aries). METHODS AND RESULTS: Microbial population dynamics was conducted using ARISA (28 sheep) and 16S rRNA sequencing (11 sheep). Firmicutes and Bacteroidetes were the predominant bacterial phyla, constituting ~80% of the total population. The core faecal bacterial microbiota of sheep consisted of 67 of 136 detected families and 91 of 215 detected species. Predominant microbial taxa included Ruminococcaceae, unassigned families in Bacteroidales and Clostridiales, Verrucomicrobiaceae and Paraprevotellaceae. Diversity indices and core microbiota composition demonstrated the stability of the core microbiota over 2-4 weeks. The core microbiota remained similar over ~5 months. CONCLUSIONS: Temporal stability of the sheep microbiota is high over 2-4 weeks in the absence of experimental variables. The core microbiota of Merino sheep shares taxa found in other breeds of sheep and other ruminants. SIGNIFICANCE AND IMPACT OF THE STUDY: Numerous studies seek to investigate the impact of experimental variables on gut microbiota composition. To do so, knowledge of the innate stability (or instability) of the microbiota over an experimental time course is required, independent of other variables. We have demonstrated high stability of the gut microbiota in sheep over 3-4 weeks, with moderate stability over ~5 months.


Assuntos
Fezes/microbiologia , Microbioma Gastrointestinal , Carneiro Doméstico/microbiologia , Animais , Bactérias/classificação , Bactérias/genética , Bactérias/isolamento & purificação , Microbioma Gastrointestinal/genética , RNA Ribossômico 16S/genética
3.
J Theor Biol ; 388: 37-49, 2016 Jan 07.
Artigo em Inglês | MEDLINE | ID: mdl-26497917

RESUMO

Most cancer treatments efficacy depends on tumor metastasis suppression, where tumor suppressor genes play an important role. Maspin (Mammary Serine Protease Inhibitor), an non-inhibitory serpin has been reported as a potential tumor suppressor to influence cell migration, adhesion, proliferation and apoptosis in in vitro and in vivo experiments in last two decades. Lack of computational investigations hinders its ability to go through clinical trials. Previously, we reported first computational model for maspin effects on tumor growth using artificial neural network and cellular automata paradigm with in vitro data support. This paper extends the previous in silico model by encompassing how maspin influences cell migration and the cell-extracellular matrix interaction in subcellular level. A feedforward neural network was used to define each cell behavior (proliferation, quiescence, apoptosis) which followed a cell-cycle algorithm to show the microenvironment impacts over tumor growth. Furthermore, the model concentrates how the in silico experiments results can further confirm the fact that maspin reduces cell migration using specific in vitro data verification method. The data collected from in vitro and in silico experiments formulates an unsupervised learning problem which can be solved by using different clustering algorithms. A density based clustering technique was developed to measure the similarity between two datasets based on the number of links between instances. Our proposed clustering algorithm first finds the nearest neighbors of each instance, and then redefines the similarity between pairs of instances in terms of how many nearest neighbors share the two instances. The number of links between two instances is defined as the number of common neighbors they have. The results showed significant resemblances with in vitro experimental data. The results also offer a new insight into the dynamics of maspin and establish as a metastasis suppressor gene for further molecular research.


Assuntos
Simulação por Computador , Modelos Biológicos , Neoplasias/metabolismo , Serpinas/metabolismo , Algoritmos , Apoptose , Adesão Celular , Linhagem Celular Tumoral , Movimento Celular , Proliferação de Células , Matriz Extracelular/metabolismo , Humanos , Metástase Neoplásica , Neoplasias/patologia , Ligação Proteica , Mapas de Interação de Proteínas , Transdução de Sinais , Microambiente Tumoral
4.
Mymensingh Med J ; 25(3): 485-91, 2016 07.
Artigo em Inglês | MEDLINE | ID: mdl-27612895

RESUMO

Iron stores in the body exist primarily in the form of ferritin. Small amounts of ferritin secreted into the plasma and plasma ferritin is positively correlated with the size of the total body iron stores. The present study conducted to determine the iron status using the serum ferritin level among healthy Bangladeshi blood donors. The present cross sectional study was conducted in the Department of Transfusion Medicine, Dhaka Medical College, Dhaka, Bangladesh from July 2011 to June 2012. Blood donor signed informed consent and has satisfactory pre-donation health assessment and satisfactory post-donation blood test results were included in the study. Full blood counts were performed within 4 hours of collection using an automated haematology analyzer. Serum ferritin was measured using a validated enzyme immunoassay. Data were analyzed using SPSS version 16 (SPPS Incorporation, Chicago, IL, USA). P value <0.05 was considered as statistically significant. Total 100 blood donors were included in the study, among them 88 were male and 12 were female. Mean±SD of the age of the respondents was 26.8±5.9 years with a range of 19 to 45 years. Mean±SD of heamoglobin level (gm/dl) and total count of Red Blood Cell (million/cmm) were 14.1±1.4 and 5.1±0.4 respectively. Mean±SD of serum ferritin level (ng/ml) was 96.4±69.0ng/ml with a range of 4.1ng/ml to 298.7ng/ml. Among the respondents 9.0% had depleted iron store, 7.0 reduced iron store and 84.0% had normal iron store. Among the respondents 5.0% had iron deficiency anaemia in term of serum ferritin level. Statistically significant difference of serum ferritin level observed between male and female and donors with and without history of previous blood donation. Among the healthy blood donors of Bangladesh abnormal serum ferritin is highly prevalent among blood donors specially among female. Monitoring of iron stores by serum ferritin seems justified in order to identify those with depleted iron stores who will benefit from iron supplementation.


Assuntos
Doadores de Sangue , Ferritinas , Ferro , Bangladesh , Estudos Transversais , Feminino , Ferritinas/sangue , Hemoglobinas , Humanos , Ferro/sangue , Ferro/metabolismo , Masculino
5.
Mymensingh Med J ; 25(2): 340-8, 2016 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-27277369

RESUMO

Blood donation results in a substantial iron loss and subsequent mobilization from body stores. Chronic iron deficiency is a well-recognized complication of regular blood donation. The present study conducted to compare the level of serum ferritin, serum iron, total iron binding capacity (TIBC) and percentage transferrin saturation in different ABO and Rhesus type blood groups among the voluntary blood donors of Bangladesh. The present prospective study included 100 healthy voluntary donors attending at Department of Blood Transfusion, Dhaka Medical College, Dhaka between the periods of July 2013 to Jun 2014. From each donor 10mL venous blood sample was taken and divided into heparinized and non-heparinized tubes for determination of hemoglobin (Hb), hematocrit (Hct), serum iron (SI), total iron binding capacity (TIBC) and serum ferritin by standard laboratory methods. Percentage of transferrin saturation (TS) calculated from serum iron and TIBC. Data were analyzed with SPSS (version 16) software and comparisons between groups were made using student's t-test and one way ANOVA. In the present study mean±SD of age of the respondents was 27.2±6.5 years with a range of 18 to 49 years and 81.0% were male and 19.0% were female. Among the donors 18.0% had blood group A, 35.0% had blood group B, 14.0% had blood group AB and 33.0% had blood group O. Among the donors 91.0% had rhesus positive and 9.0% had rhesus negative. Donors with blood group O had lowest haemoglobin, serum iron and transferring saturation levels. Donors with blood group A had highest TIBC level. Donors with blood group B had lowest serum ferritin level. An independent samples 't' test showed statistically significant difference in serum ferritin and percentage transferrin saturation between blood group AB and blood group O and in percentage transferrin saturation between blood group B and blood group O. One way ANOVA showed that there is no significant difference in haemoglobin, serum iron, serum ferritin and percentage transferring saturation in different ABO and Rh blood grouping categories. Blood donors with blood group O had lowest haemoglobin, serum iron and transferring saturation levels and donors with blood group A had highest TIBC level. Blood donors with blood group B had lowest serum ferritin level. The understanding of the different blood groups ability to retain iron in their system can give an insight into their ability to handle the disease iron deficiency anaemia.


Assuntos
Sistema ABO de Grupos Sanguíneos/genética , Doadores de Sangue , Ferritinas/sangue , Hemoglobinas/análise , Ferro/sangue , Adolescente , Adulto , Bangladesh , Doadores de Sangue/estatística & dados numéricos , Estudos Transversais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Adulto Jovem
6.
Mymensingh Med J ; 24(4): 717-22, 2015 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-26620009

RESUMO

This cross sectional study was designed to see association of chronic gastritis including its type with H. pylori infection. Consecutive patients undergoing endoscopic examination having histopathological evidence of chronic gastritis were enrolled in the study and was done in Sylhet MAG Osmani Medical College from July 2011 to June 2012. Biopsies were taken from antrum, body and fundus in all patients. Histopathological examinations were done using H-E stain and for detection of H. pylori, rapid urease test, anti-H.pylori antibody test and histopathological test with modified Giemsa stain were done. Patients having results positive in at least two methods were considered infected by H. pylori. Total 80 dyspeptic patients having chronic gastritis were evaluated. Out of them 67(83.8%) had H. pylori infection and 13(16.2%) were H. pylori negative. Among all patients 57(71.2%) had pangastritis and 23(28.8%) had antral gastritis with female and male predominance respectively. H. pylori infection was present in 49(86.0%) cases of pangastritis and 18(78.3%) cases of antral gastritis. H. pylori infection was a little higher among males (34, 50.7%) females (33, 49.3%). H. pylori infection is the predominant cause of chronic gastritis and pangastritis is the major type.


Assuntos
Gastrite/etiologia , Infecções por Helicobacter/complicações , Helicobacter pylori/isolamento & purificação , Adulto , Doença Crônica , Estudos Transversais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade
7.
J Theor Biol ; 337: 150-60, 2013 Nov 21.
Artigo em Inglês | MEDLINE | ID: mdl-23988797

RESUMO

Cancer metastasis is a complex multistep process which allows cancer cells to establish new tumours in distant organs. The process of metastasis involves cell migration and invasion; it is what makes cancer a fatal disease. The efficiency of most cancer treatments depends on metastasis suppression. Maspin is a type II tumour metastasis suppressor which has multiple cellular effects. It has been described as a key regulatory protein in both the intracellular and extracellular environments. Maspin has been shown to reduce cell migration, invasion, proliferation and angiogenesis, and increase apoptosis and cell-cell adhesion in in vitro and in vivo experiments. The clinical data regarding the predictive effects of maspin expression are variable. To date, the whole cellular mechanisms that maspin uses to influence tumour cell behaviours have not been clearly defined. The diversity of the effects of maspin motivated us to develop an intelligent model to investigate its effects on cellular proliferation and migration. This paper reports a hybrid model of solid tumour growth in order to investigate the impact of maspin on the growth and evolutionary dynamics of the cancer cell. A feed-forward neural network was used to model the behaviours (proliferation, quiescence, apoptosis and/or movement) of each cell, which has been suggested as a suitable model of cell signalling pathways. Results show that maspin reduces migration by 10-40%, confirmed by published in vitro data. The model also shows a reduction in cell proliferation by 20-30% in the presence of maspin. So far, this is the first attempt to model the effect of maspin in a computational model to verify in vitro data. This will provide new insights into the tumour suppressive properties of maspin and inform the development of novel cancer therapies.


Assuntos
Simulação por Computador , Modelos Biológicos , Neoplasias/patologia , Serpinas/farmacologia , Animais , Apoptose/efeitos dos fármacos , Linhagem Celular Tumoral , Movimento Celular/efeitos dos fármacos , Proliferação de Células/efeitos dos fármacos , Humanos , Invasividade Neoplásica , Neoplasias/tratamento farmacológico , Neoplasias/metabolismo , Redes Neurais de Computação , Serpinas/uso terapêutico
8.
Mymensingh Med J ; 22(2): 325-30, 2013 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-23715356

RESUMO

The present study has examined the association between ischemic stroke and hyperuricemia in Bangladeshi population. This age and sex matched case control study was carried out in the Department of Neurology, Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka, Bangladesh during the period of January 2007 to December 2008. A total of 120 subjects were included in this study, among them 60 were cases and another 60 were controls. Data were collected purposively. Multiple logistic regressions were done to identify the risk factors for ischemic stroke. In this study 68.3% were male and 31.7% were female in both the groups. Male and female ratio of stroke patients was 2.16:1. Mean±SD of serum uric acid level of case and control group was 4.94±1.76 and 3.72±1.09 respectively. Among the case group 76.7% had normal and 23.3% had abnormal serum uric acid level. On the other hand, 93.3% respondents of control group had normal and 6.7% had abnormal serum uric acid (SUA) level. Significant differences was found between case and control group in term of SUA level (p<0.05). Since SUA level is a quantitative numerical variable, an increase in 1mg/dl has a 47.0% (95% CI 1.0% to 2.16%) increase in odds ratio (OR) of having ischemic stroke. This 47.0% is obtained by taking OR for uric acid-1. Elevated serum uric acid level is not significant for ischemic stroke among the Bangladeshi population.


Assuntos
Isquemia Encefálica/sangue , Acidente Vascular Cerebral/sangue , Ácido Úrico/sangue , Idoso , Comorbidade , Feminino , Humanos , Modelos Logísticos , Masculino , Pessoa de Meia-Idade , Fatores de Risco
9.
Mymensingh Med J ; 32(4): 1123-1132, 2023 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-37777911

RESUMO

Etiology of congenital heart defects are complex and possibly lie within the interaction of environmental exposures and inherited factors. Exploration of the contribution of environmental risk factors that are potentially modifiable impeded the prevention of CHDs. This study was conducted to evaluate the environmental risk factors of CHD. It was a case control study, conducted from July 2018 to June 2019 in Paediatric Cardiology department of Dhaka Shishu (Children) Hospital, Bangladesh. Parents of the children with CHDs visiting the out-patient department were considered as case. Control was taken from parents of the children not having congenital heart disease. Data were collected by face-to-face interview using a structured questionnaire containing all the variables of interest and analyzed by using SPSS version 21.0. Majority of the respondents were from rural area (86.9% and 80.0% in case and control group respectively) and CHD was found significantly higher in rural population (p<0.05). Consanguinity was present in 8.9% in case group and CHD was found significantly higher among children born to consanguineous parents (p<0.05). Most of the mother (65.4%) had completed primary level of education however 11.9% mother was illiterate in case group. CHD was found significantly higher among illiterate mothers (p<0.05). Most of the respondents belonged to lower and lower-middle class family (83.1% and 75.7% in case and control group respectively) and CHD was found significantly higher among them (p<0.05). Mothers exposed to passive smoking and in stress during pregnancy period, CHD was significantly higher (p<0.05). No significant association was found between maternal drug use and infection during pregnancy period with CHD (p<0.05). Maternal illiteracy, residing in rural areas, low and lower- middle class socioeconomic status, consanguineous marriage, exposed to passive smoking and stress during pregnancy period have been significantly associated with CHDs.


Assuntos
Cardiopatias Congênitas , Poluição por Fumaça de Tabaco , Feminino , Gravidez , Humanos , Criança , Estudos de Casos e Controles , Poluição por Fumaça de Tabaco/efeitos adversos , Bangladesh/epidemiologia , Cardiopatias Congênitas/etiologia , Cardiopatias Congênitas/induzido quimicamente , Fatores de Risco
10.
Eur J Med Chem ; 260: 115732, 2023 Nov 15.
Artigo em Inglês | MEDLINE | ID: mdl-37651876

RESUMO

Neddylation is a protein modification process similar to ubiquitination, carried out through a series of activating (E1), conjugating (E2), and ligating (E3) enzymes. This process has been found to be overactive in various cancers, leading to increased oncogenic activities. Ubiquitin-conjugating enzyme 2 M (UBE2M) is one of two neddylation enzymes that play a vital role in this pathway. Studies have shown that targeting UBE2M in cancer treatment is crucial, as it regulates many molecular mechanisms like DNA damage, apoptosis, and cell proliferation. However, developing small molecule inhibitors against UBE2M remains challenging due to the lack of suitable druggable pockets. We have discovered that Micafungin, an antifungal agent that inhibits the production of 1,3-ß-D-glucan in fungal cell walls, acts as a neddylation inhibitor that targets UBE2M. Biochemical studies reveal that Micafungin obstructs neddylation and stabilizes UBE2M. In cellular experiments, the drug was found to interact with UBE2M, prevent neddylation, accumulate cullin ring ligases (CRLs) substrates, reduce cell survival and migration, and induce DNA damage in gastric cancer cells. This research uncovers a new anti-cancer mechanism for Micafungin, paving the way for the development of a novel class of neddylation inhibitors that target UBE2M.


Assuntos
Antifúngicos , Neoplasias , Antifúngicos/farmacologia , Apoptose , Núcleo Celular , Proliferação de Células , Micafungina/farmacologia , Enzimas de Conjugação de Ubiquitina/química , Enzimas de Conjugação de Ubiquitina/metabolismo
11.
Biomed Pharmacother ; 161: 114438, 2023 May.
Artigo em Inglês | MEDLINE | ID: mdl-37002569

RESUMO

Histone deacetylase 6 (HDAC6) is a class IIb histone deacetylase that contains two catalytic domains and a zinc-finger ubiquitin binding domain (ZnF-UBP) domain. The deacetylation function of HDAC6 has been extensively studied with common substrates such as α-tubulin, cortactin, and Hsp90. Apart from its deacetylase activity, HDAC6 ZnF-UBP binds to unanchored ubiquitin of specific sequences and serves as a carrier for transporting aggregated proteins. As a result, aggresomes are formed and protein degradation is facilitated by the autophagy-lysosome pathway. This HDAC6-dependent microtubule transport can be used by cells to assemble and activate inflammasomes, which play a critical role in immune regulation. Even viruses can benefit from the carrier of HDAC6 to assist in uncoating their surfaces during their infection cycle. However, HDAC6 is also capable of blocking virus invasion and replication in a non-enzymatic manner. Given these non-enzymatic functions, HDAC6 is closely associated with various diseases, including neurodegeneration, inflammasome-associated diseases, cancer, and viral infections. Small molecule inhibitors targeting the ubiquitin binding pocket of HDAC6 have been investigated. In this review, we focus on mechanisms in non-enzymatic functions of HDAC6 and discuss the rationality and prospects of therapeutic strategies by intervening the activation of HDAC6 ZnF-UBP in concrete diseases.


Assuntos
Histona Desacetilases , Ubiquitina , Desacetilase 6 de Histona/metabolismo , Histona Desacetilases/metabolismo , Ubiquitina/metabolismo , Proteínas de Transporte/metabolismo , Ligação Proteica
12.
Int J Biol Macromol ; 230: 123219, 2023 Mar 01.
Artigo em Inglês | MEDLINE | ID: mdl-36642357

RESUMO

Histone deacetylase 6 (HDAC6) is the only member of the HDAC family that resides primarily in the cytoplasm with two catalytic domains and a ubiquitin-binding domain. HDAC6 is highly expressed in various solid tumors and participates in a wide range of biological activities, including hormone receptors, the p53 signaling pathway, and the kinase cascade signaling pathway due to its unique structural foundation and abundant substrate types. Additionally, HDAC6 can function as an oncogenic factor in solid tumors, boosting tumor cell proliferation, invasion and metastasis, drug resistance, stemness, and lowering tumor cell immunogenicity, so assisting in carcinogenesis. Pan-HDAC inhibitors for cancer prevention are associated with potential cardiotoxicity in clinical investigations. It's interesting that HDAC6 silencing didn't cause any significant harm to normal cells. Currently, the use of HDAC6 specific inhibitors, individually or in combination, is among the most promising therapies in solid tumors. This review's objective is to give a general overview of the structure, biological functions, and mechanism of HDAC6 in solid tumor cells and in the immunological milieu and discuss the preclinical and clinical trials of selective HDAC6 inhibitors. These endeavors highlight that targeting HDAC6 could effectively kill tumor cells and enhance patients' immunity during solid tumor therapy.


Assuntos
Neoplasias , Humanos , Proliferação de Células , Desacetilase 6 de Histona/metabolismo , Desacetilase 6 de Histona/farmacologia , Inibidores de Histona Desacetilases/farmacologia , Inibidores de Histona Desacetilases/química , Inibidores de Histona Desacetilases/metabolismo , Neoplasias/tratamento farmacológico
13.
J Theor Biol ; 313: 142-52, 2012 Nov 21.
Artigo em Inglês | MEDLINE | ID: mdl-22974970

RESUMO

The potential for the use of in-silico models of disease in progression monitoring is becoming increasingly recognised, as well as its contribution to the development of complete curative processes. In this paper we report the development of a hybrid cellular automaton model to mimic the growth of avascular tumours, including the infusion of a bioreductive drug to study the effects of protein binding on drug transportation. The growth model is operated within an extracellular tumour microenvironment. An artificial Neural Network based scheme was implemented that modelled the behaviours of each cell (proliferation, quiescence, apoptosis and/or movement) based on the complex heterogeneous microenvironment; consisting of oxygen, glucose, hydrogen ions, inhibitory factors and growth factors. To validate the growth model results, we conducted experiments with multicellular tumour spheroids. These results showed good agreement with the predicted growth dynamics. The outcome of the avascular tumour growth model suggested that tumour microenvironments have a strong impact on cell behaviour. To address the problem of cellular proteins acting as resistive factors preventing efficient drug penetration, a bioreactive drug (tirapazamine) was added to the system. This allowed us to study the drug penetration through multicellular layers of tissue after its binding to cellular proteins. The results of the in vitro model suggested that the proteins reduce the toxicity of the drug, reducing its efficacy for the most severely hypoxic fractions furthest from a functional blood vessel. Finally this research provides a unique comparison of in vitro tumour growth with an intelligent in silico model to measure bioreductive drug availability inside tumour tissue through a set of experiments.


Assuntos
Antineoplásicos/metabolismo , Modelos Biológicos , Neoplasias/irrigação sanguínea , Neoplasias/patologia , Antineoplásicos/farmacologia , Transporte Biológico/efeitos dos fármacos , Hipóxia Celular/efeitos dos fármacos , Proliferação de Células/efeitos dos fármacos , Sobrevivência Celular/efeitos dos fármacos , Difusão/efeitos dos fármacos , Células HT29 , Humanos , Redes Neurais de Computação , Ligação Proteica/efeitos dos fármacos , Reprodutibilidade dos Testes , Esferoides Celulares/efeitos dos fármacos , Esferoides Celulares/patologia , Tirapazamina , Triazinas/metabolismo , Triazinas/farmacologia
14.
Fish Shellfish Immunol Rep ; 3: 100070, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36419597

RESUMO

Striped catfish, Pangasianodon hypophthalmus was immunized with Biofilm (BF) and Free cell (FC) of Aeromonas hydrophila vaccine at 1010 CFU g-1 for 20 days and monitored for growth parameters, immune responses and disease resistance up to 60 day post vaccination (dpv). Pangasius catfish in the BF vaccinated group had considerably higher growth and feed utilization than the FC vaccinated and unvaccinated groups (p < 0.05). Biofilm vaccinated group showed a significant increase (p < 0.05) in the mean weight gain (46.91 ± 0.59) than the FC (35.94 ± 0.21) and unvaccinated group (34.92 ± 0.35). The vaccinated fishes were challenged with A. hydrophila at 107 CFU/ml. Significant higher relative percentage survival (RPS) was recorded with BF (84.21 ± 1.49%) compared to that with FC (33.33 ± 1.21%). Polyclonal antibody-based ELISA was used to quantify the antibody titre. BF vaccinated group showed significantly higher antibody titer compared to other treatments (p < 0.05). Moreover, higher haematological parameters recorded in the present study were differentially stimulated by the oral administration of A. hydrophila biofilm vaccine. The mean total protein, albumin, and globulin levels of the BF vaccine groups were significantly higher (p < 0.05) than the mean total protein, albumin, and globulin contents of the unvaccinated group. Furthermore, biochemical stress parameters (SGPT, SGOT) in the vaccinated groups showed an incremental trend in the early days of the experimental period. However, the values were significantly lower (p < 0.05) in the biofilm group on 20 dpv onwards indicating improved health condition. Vaccinated BF fishes showed gut associated lymphoid tissues (GALT) within the laminar propria of mid gut. But in FC group fishes showed less aggregation of lymphoid cells. The unvaccinated control fish had no lymphoid cell aggregation in their intestines. The findings of the current research suggested that biofilm vaccine has the capability to be one of the potential oral vaccines in striped catfish against A. hydrophila infection.

15.
Rev Sci Instrum ; 93(7): 073303, 2022 Jul 01.
Artigo em Inglês | MEDLINE | ID: mdl-35922315

RESUMO

The 300 kV DC high voltage photogun at Jefferson Lab was redesigned to deliver electron beams with a much higher bunch charge and improved beam properties. The original design provided only a modest longitudinal electric field (Ez) at the photocathode, which limited the achievable extracted bunch charge. To reach the bunch charge goal of approximately few nC with 75 ps full-width at half-maximum Gaussian laser pulse width, the existing DC high voltage photogun electrodes and anode-cathode gap were modified to increase Ez at the photocathode. In addition, the anode aperture was spatially shifted with respect to the beamline longitudinal axis to minimize the beam deflection introduced by the non-symmetric nature of the inverted insulator photogun design. We present the electrostatic design of the original photogun and the modified photogun and beam dynamics simulations that predict vastly improved performance. We also quantify the impact of the photocathode recess on beam quality, where recess describes the actual location of the photocathode inside the photogun cathode electrode relative to the intended location. A photocathode unintentionally recessed/misplaced by sub-millimeter distance can significantly impact the downstream beam size.

16.
Mymensingh Med J ; 31(4): 925-930, 2022 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-36189534

RESUMO

Well established and common practice in conservative management of omphalocele major is escharotics therapy with different topical agents. Among them mercurochrome, alcohol, silver salts, povidone iodine, acacia nilotca paste are commonly used. It is a comparative study between application of acacia nilotica paste and povidone iodine solution as a primary non surgical treatment of omphalocele major regarding efficacy and safety of these two topical agents. A double blind randomized controlled study was conducted at the department of Paediatric Surgery, Mymensingh Medical College Hospital, Mymensingh, Bangladesh from July 2016 to June 2019. In this study 20 cases of omphalocele major and randomly divided into two equal groups. Group A and Group B treated with acacia nilotica paste and povidone iodine solution respectively. Gastroschisis, ruptured-omphalocele major or omphalocele minor excluded in this study. The size of the fascial defect in cm, time required for full oral feeding tolerance and duration of hospital stay were evaluating parameters. Patients with Group A tolerated full oral feeding earlier, shorter total hospital stay duration and low mortality rate than those from Group B. Application of acacia nilotica is a safe and effective treatment of omphalocele major regarding rapid full oral feeding tolerance, shorter hospital stay and low mortality rate.


Assuntos
Acacia , Anti-Infecciosos Locais , Hérnia Umbilical , Anti-Infecciosos Locais/uso terapêutico , Criança , Hérnia Umbilical/tratamento farmacológico , Hérnia Umbilical/cirurgia , Humanos , Merbromina/uso terapêutico , Povidona-Iodo/uso terapêutico , Sais/uso terapêutico , Prata/uso terapêutico
17.
Mymensingh Med J ; 20(4): 645-51, 2011 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-22081184

RESUMO

In order to find out the fluctuation of pain by weather change, a descriptive cross-sectional study was conducted among 138 individuals having musculoskeletal disorders (MSDs) attending the out patient department (OPD) of Physical Medicine and Rehabilitation, Bangabandhu Sheikh Mujib Medical University (BSMMU) Hospital, Dhaka, during March 2004 to June 2004. Data were collected by face to face interview employing a pre-tested interview schedule containing structured questions. Among 138 respondents, male were predominant (52.2%). Mean age of the respondents was 39.42±10.79 years, while the most common age group was found as '31 to 40 years'. By occupation, majority were housewives (40.58%), followed by businessmen (29.71%), service holder (15.22%), laborer (7.97%), and students (6.52%). The primary sites of pain were back and low back (38.4%), knee (24.6%), leg (8.7%), ankle and heel (8.0%), hand and wrist (6.5%), neck (5.8%), shoulder (5.8%), and elbow (2.2%). Highest number (47.8%) patients reported aching pain, while one fifth (20.3%) of them experienced burning pain. About 36.2 percent respondents mentioned 'prolonged standing' as the main cause of pain aggravation, while almost half (48.6%) of the patients perceived that 'application of heat' was the key relieving factor of their pain. About two third (63%) of the respondents were sensitive to weather change; among them 56.3 percent reported that their pain increased during cold weather. Moreover, more than two third (67.4%) study-patients experienced deterioration of pain due to seasonal variation; of them 59.1 percent reported that their pain was exacerbated in winter season. Of all respondents, less than one third (30.4%) experienced aggravation of pain due to lunar change; of them majority (85.7%) experienced increased pain during dark fortnights. Our study concluded that weather change might have an important role in fluctuation of pain among individuals having musculoskeletal disorders.


Assuntos
Doenças Musculoesqueléticas/fisiopatologia , Dor/etiologia , Tempo (Meteorologia) , Adulto , Fatores Etários , Estudos Transversais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade
18.
Mymensingh Med J ; 30(1): 196-201, 2021 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-33397874

RESUMO

Malnutrition is a serious public health problem that has been linked to increase risk of morbidity and mortality in slums of Dhaka city and where the prevalence of malnutrition is very high. This study was conducted to evaluate the risk factors of malnutrition among under-5 children of selective slum area in Dhaka City. This cross sectional study was conducted from January 2016 to December 2019, among 500 under-5 children selected by random sampling technique from Agargaon and Beribadh slums of Dhaka city. Anthropometric measurements were taken using standard methods those were weight, height, MUAC and age. A questionnaire was ready for data collection containing episode of diseases, breast feeding status, complementary feeding, family size, family income, maternal education status, housing, source of drinking water etc in under-5 children. Data were analyzed by using SPSS version 21.0. Among 500 children from slums area, malnutrition was present in 220(44%) cases. Out of them 115(23%) children were wasted, 205(41%) children were stunted and 175(35%) children were underweight. Malnutrition was found significantly high among non-breast feed babies, who breast feed only for 6 months, in whom colostrum was not given and also when complimentary feeding was not given properly (p<0.05). Malnourished children were found significantly higher among illiterate mothers and those who used Kancha house (p<0.05). Wasting, stunting and underweight were more with increasing family size. There were a decreased number of malnutrition cases when family income rises. Diarrhoea and ARI was significantly associated with malnutrition (p<0.05). Large number of children in slum areas of Dhaka city was suffering from malnutrition. Malnutrition was significantly higher among children who did not get colostrum; non-breast fed and got improper complimentary feeding. Maternal illiteracy, living in Kancha house, large family size, family income and associated disease condition were also contributed to malnutrition.


Assuntos
Desnutrição , Áreas de Pobreza , Bangladesh/epidemiologia , Criança , Estudos Transversais , Feminino , Humanos , Lactente , Desnutrição/epidemiologia , Prevalência , Fatores de Risco
19.
J Hematol Oncol ; 14(1): 57, 2021 04 07.
Artigo em Inglês | MEDLINE | ID: mdl-33827629

RESUMO

Ubiquitin-conjugating enzyme E2 M (UBE2M) and ubiquitin-conjugating enzyme E2 F (UBE2F) are the two NEDD8-conjugating enzymes of the neddylation pathway that take part in posttranslational modification and change the activity of target proteins. The activity of E2 enzymes requires both a 26-residue N-terminal docking peptide and a conserved E2 catalytic core domain, which is the basis for the transfer of neural precursor cell-expressed developmentally downregulated 8 (NEDD8). By recruiting E3 ligases and targeting cullin and non-cullin substrates, UBE2M and UBE2F play diverse biological roles. Currently, there are several inhibitors that target the UBE2M-defective in cullin neddylation protein 1 (DCN1) interaction to treat cancer. As described above, this review provides insights into the mechanism of UBE2M and UBE2F and emphasizes these two E2 enzymes as appealing therapeutic targets for the treatment of cancers.


Assuntos
Dano ao DNA/genética , Proteína NEDD8/metabolismo , Neoplasias/genética , Enzimas de Conjugação de Ubiquitina/metabolismo , Humanos , Neoplasias/patologia
20.
Mymensingh Med J ; 30(3): 657-665, 2021 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-34226452

RESUMO

Intramedullary nailing is a pillar in the treatment of femoral shaft fractures. But it is not possible in all cases especially in comminuted fractures. This study has been designed to explain the importance of Minimally Invasive Plate Osteosynthesis (MIPO) with the locking plate in the treatment of comminuted Femoral Shaft Fracture. Twenty (20) such patients were treated by MIPO and analysis has been done in this study to get fruitful result and to find out the effectiveness of this procedure who were admitted at Mymensingh Medical College Hospital, Mymensingh, a tertiary level hospital of Bangladesh from February 2018 to January 2019. Mean age of the patients were 49.20±14.41 years. Based on AO classification, there were 4, 8 and 8 patients belong to type A, B and C respectively. The union period for all the patients was in between 12 to 14 weeks. The mean union period was 12.90±1.997 weeks. Mean follow up period was 19.70±2.77 weeks. Mean full weight bearing period was 16.50±1.10 weeks. In Thoresen scoring system excellent result was 9(45%), good result was 10(20%) and fair result was 01(5%). Mal-alignment happened in two cases. However, delayed union and broken screws were found in two cases each of which was treated accordingly. Comminuted Femoral shaft fracture with MIPO procedure is more effective treatment than intramedullary nailing. Furthermore, mal-alignment is the basic complexity that must be taken away intraoperatively.


Assuntos
Fraturas do Fêmur , Fraturas Cominutivas , Adulto , Bangladesh , Placas Ósseas , Fraturas do Fêmur/diagnóstico por imagem , Fraturas do Fêmur/cirurgia , Fixação Interna de Fraturas , Fraturas Cominutivas/diagnóstico por imagem , Fraturas Cominutivas/cirurgia , Humanos , Pessoa de Meia-Idade , Procedimentos Cirúrgicos Minimamente Invasivos , Resultado do Tratamento
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