1
|
Harding A, Pramanik A, Basak A, Prakash C, Shankar S. Application of additive manufacturing in the biomedical field- A review. ANNALS OF 3D PRINTED MEDICINE 2023. [DOI: 10.1016/j.stlm.2023.100110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023] Open
|
2
|
Pramanik A, Bera S, Menda R, Mondal M, Karunakaran M, Santra A, Das SK. 110 Enhancement of developmental competence of immature oocytes supplementing with leukaemia inhibitory factor as a media supplement. Reprod Fertil Dev 2022. [DOI: 10.1071/rdv35n2ab110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
|
3
|
Goel A, Pramanik A. Effect of post-activation potentiation using core activation on isometric core strength and countermovement jump variables in university male recreational athletes. COMPARATIVE EXERCISE PHYSIOLOGY 2022. [DOI: 10.3920/cep220012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Core strengthening exercises have been integrated into the conditioning regimens of sportsmen of all levels. Despite a wealth of evidence, the question of what influence core stability exercises have on jump performance remains unsolved. Only a small percentage of studies have explored effects of standalone core training. The objective of this research was to explore acute changes in countermovement jump (CMJ) performance caused by post-activation potentiation (PAP) adopting core activation exercises. 25 male recreational athletes were recruited as participants. They visited on three occasions-first for familiarisation, following for baseline data using a conventional warmup, and final for repeat data upon inducing PAP. Isometric dynamometer was used to quantify core isometric strength and CMJ variables were evaluated using a Portable performance analysis system with MARS Software. Paired t-test and multivariate analysis were carried out. All core strength metrics reported marked increase at P<0.001 from conventional to PAP warmup. Following CMJ metrics varied significantly: jump height from take-off (P<0.001), jump height from flight (P<0.01), flight time (P<0.01,) and force at free-fall (P<0.001). Core training with PAP is a form of neuromuscular training that has the potential to improve power, agility, and speed by modifying force absorption, active joint stabilisation, and improved movement patterns. These alterations are ascribed to changes in cerebral drive, as well as enhanced motor-unit activation and firing frequency at the muscle level. Before a competition, a core activation warm-up can offer a unique training stimulus and increase performance via an ergogenic response. The core is essential for optimal athletic performance and should not be overlooked.
Collapse
|
4
|
Fadzil AFBA, Pramanik A, Basak A, Prakash C, Shankar S. Role of surface quality on biocompatibility of implants - A review. ANNALS OF 3D PRINTED MEDICINE 2022. [DOI: 10.1016/j.stlm.2022.100082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
|
5
|
Pramanik A, Das S, Kumar B, Ganguly S, Singh M, Guleria K, Shenoy S, Singh S. Supplemental aerobic, anaerobic and strength training positively affects autonomic functioning, anaerobic capacity, and immune cell homeostasis of male judo athletes. COMPARATIVE EXERCISE PHYSIOLOGY 2022. [DOI: 10.3920/cep210018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The present study aimed to investigate the effect of additional package of aerobic, anaerobic and strength training (AAS training), along with the conventional judo specific training, on autonomic nervous system balance, anaerobic capacity, exercise adaptation, phenotype of different blood mononuclear cells and cellular inflammatory signalling of university judo athletes. Thirty male judokas were randomly allocated to a control group/conventional judo specific training group (performing Uchi-komi, Nage komi, and Randori) or to an experimental group/conventional judo specific training + additional AAS training group. Physiological data including recovery ANS variables and anaerobic capacity were obtained by using wireless heart rate variability and anaerobic cycle ergometer, respectively, at two different time points (T1-pre, T3-post). Serum and primary mononuclear cells were prepared at three different time points (T1-pre, T2-acute, T3-post) and processed further as per the experimental requirement. For measuring the expression level of genes, and proteins biomarkers related to immune health, we have performed advanced qPCR array technique, flow cytometry, ELISA and zymosan-fluorescein assays. The additional training modality enhanced athletes’ anaerobic performance, parasympathetic functioning, and exercise adaptation. On the other hand, it decreased fatigue index, stress index, number of reactive immune cells, and intensity of inflammatory signalling. Overall, the present study, for the very first time, exhibited the positive effect of four weeks long additional AAS training on autonomic functioning, anaerobic capacity, and immune cell homeostasis of male judo athletes. This additional training package might also help the judo coaches to optimise training schedule for the competitive session.
Collapse
|
6
|
Pramanik A, Basak AK, Littlefair G, Debnath S, Prakash C, Singh MA, Marla D, Singh RK. Methods and variables in Electrical discharge machining of titanium alloy - A review. Heliyon 2020; 6:e05554. [PMID: 33344787 PMCID: PMC7736727 DOI: 10.1016/j.heliyon.2020.e05554] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 07/02/2020] [Accepted: 11/16/2020] [Indexed: 11/16/2022] Open
Abstract
Titanium alloys are difficult to machine using conventional methods, therefore, nonconventional processes are often chosen in many applications. Electrical discharge machining (EDM) is one of those nonconventional processes that is used frequently for shaping titanium alloys with their respective pros and cons. However, a good understanding of this process is very difficult to achieve as research results are not properly connected and presented. Therefore, this study investigates different types of EDM processes such as, wire EDM, die-sink EDM, EDM drill and hybrid EDM used to machine titanium alloys. Machining mechanism, tool electrode, dielectric, materials removal rate (MRR), and surface integrity of all these processes are critically analysed and correlated based on the evidence accessible in literature. Machining process suffer from lower material removal rate and high tool wear while applied on titanium alloys. Formation of recast layer, heat affected zone and tool wear is common in all types of EDM processes. Additional challenge in wire EDM of titanium alloys is wire breakage under severe machining conditions. The formation of TiC and TiO2 are noticed in recast layer depending on the type of dielectrics. Removal of debris from small holes during EDM drilling is a challenge. All these restricts the applications EDMed titanium alloys in high-tech applications such as, aerospace and biomedical areas. Most of these challenges come up due to extraordinary properties such as, low thermal conductivity, high melting point and high hardness, of titanium alloys. Though hybrid EDM has been introduced and there is some work on simulation of EDM process, further developments in EDM of this alloy is required for widening the application of this methods.
Collapse
|
7
|
Pramanik A, Garg S. Design of diffusion-controlled drug delivery devices for controlled release of Paclitaxel. Chem Biol Drug Des 2019; 94:1478-1487. [PMID: 30920732 DOI: 10.1111/cbdd.13524] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 03/18/2019] [Accepted: 03/20/2019] [Indexed: 12/12/2022]
Abstract
Controlled drug delivery devices were predicted in a reverse engineering framework for the controlled release of Paclitaxel, an anti-cancer drug, widely used in the treatment of solid tumors. Using quantitative structure-property relationship models for mutual diffusion coefficients of the drug in biocompatible and biodegradable polymers and partition coefficients of the drug between polymers and blood, a framework was developed to predict optimal drug delivery devices for desired dosage regimens. The validation of the predicted mutual diffusion and partition coefficients using experimental data was reported in previous studies. Optimal design parameters along with selection of most appropriate polymers suitable for different dosage regimens, selected based on current clinical practice, were predicted for maximum bioavailability of the drug while maintaining the released drug concentration in blood within the therapeutic range. Reservoir and monolithic type of diffusion-controlled drug delivery devices of different shapes and sizes were predicted with different initial drug loadings and bioavailability for different dosage regimens. The effects of the released Paclitaxel from these devices on the tumor growth were also modeled using a previously reported mathematical pharmacokinetic-pharmacodynamic model. The proposed approach can easily be used to design other diffusion-controlled drug delivery devices.
Collapse
|
8
|
Pramanik A, Datta AK, Das D, Kumbhakar DV, Ghosh B, Mandal A, Gupta S, Saha A, Sengupta S. Assessment of Nanotoxicity (Cadmium Sulphide and Copper Oxide) Using Cytogenetical Parameters in Coriandrum sativum L. (Apiaceae). CYTOL GENET+ 2018. [DOI: 10.3103/s0095452718040084] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
9
|
Pramanik A, Garg S. Prediction of the partition coefficients using QSPR modeling and simulation of paclitaxel release from the diffusion-controlled drug delivery devices. Drug Deliv Transl Res 2018; 8:1300-1312. [PMID: 29700777 DOI: 10.1007/s13346-018-0530-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
An in silico approach is proposed to first predict the partition coefficient of the model drug, paclitaxel, in different biocompatible and biodegradable polymer versus the blood plasma using artificial neural networks (ANNs) and semi-empirical quantitative structure property relationships (QSPRs). A simplified molecular-input line-entry system (SMILES) notation is used to represent the structures of the different polymers and the drug. The SMILES notation is then used to calculate the various structure-based descriptors. These descriptors are then used in the ANNs and semi-empirical QSPRs to predict the properties for a given drug-polymer device. A fluid flow model is subsequently solved to simulate the controlled drug release in the blood plasma. The effects of various parameters are also studied on the drug release profiles from these devices. The proposed approach provides a systematic framework to simulate the controlled release of the drug from the diffusion-controlled drug-polymer release systems. The developed models can be used in a reverse engineer framework to design the controlled delivery devices for a target drug release profile in near future.
Collapse
|
10
|
Pramanik A, Biswas S, Kumbhakar P. Solvatochromism in highly luminescent environmental friendly carbon quantum dots for sensing applications: Conversion of bio-waste into bio-asset. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 191:498-512. [PMID: 29091909 DOI: 10.1016/j.saa.2017.10.054] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 10/14/2017] [Accepted: 10/20/2017] [Indexed: 05/22/2023]
Abstract
Recently studies on synthesis and fluorescence based sensing in biocompatible carbon quantum dots (CQDs) have become a widely spoken topic of research due to the several advantageous properties of CQDs in compared to semiconductor quantum dots. In this work, we have reported the rarely reported solvatochromism along-with a high photoluminescence (PL) quantum yield (PLQY) of 22%. Samples have been synthesized by using a simple process of hydrothermal carbonization of a naturally occurring bio-waste i.e. Aegle marmelos leaves powder. The linear absorption and PL emission characteristics of CQDs have been studied in different solvent environments to explore the origin of the observed excitation dependent PL emissions characteristics of the sample. The interesting solvatochromic PL (SPL) behavior of CQDs are observed at an excitation wavelength of 325nm by dispersing them in different polar protic and aprotic solvents, which suggest their possible applications as a replacement of solvatochromic dye molecules for sensing applications. Different polarity functions and molecular-microscopic solvent polarity parameter (ETN) are used to calculate the change in dipole moment (Δδ) of the solute-solvent system and the origin of SPL in CQDs has been explained. The SPL behavior of CQDs has been utilized for fluorescence sensing of organic liquids (Ethanol and Tetrahydrofuran) in water. Whereas, the photo-induced electron transfer mediated quenching in PL of aqueous dispersion of CQDs has led to development of "turn off" fluorescence Fe3+ ion sensor with a detection limit of 0.12μM. Therefore, this work may open a new avenue of conversion of a bio-waste into a fluorescent bio-asset.
Collapse
|
11
|
Salam H, Dong Y, Davies IJ, Pramanik A. Optimization of material formulation and processing parameters in relation to mechanical properties of bioepoxy/clay nanocomposites using Taguchi design of experiments. J Appl Polym Sci 2017. [DOI: 10.1002/app.45769] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
12
|
Shams OA, Pramanik A, Chandratilleke TT. Thermal-Assisted Machining of Titanium Alloys. MATERIALS FORMING, MACHINING AND TRIBOLOGY 2017. [DOI: 10.1007/978-3-319-56099-1_3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
|
13
|
Panda S, Singh B, Sharief M, Hameed S, Pramanik A. The genus Zeuxine Lindl. (Orchidaceae) in Tripura State, India. JOURNAL OF THREATENED TAXA 2016. [DOI: 10.11609/jott.2843.8.14.9675-9677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
An account of two species of Zeuxine Lindl. (Orchidaceae) occurring in Tripura is presented in this paper. Zeuxine longilabris (Lindl.) Benth. ex Hook.f. turned out to be a new distributional record for the state of Tripura.
Collapse
|
14
|
Pramanik A, Kole AK, Krishnaraj RN, Biswas S, Tiwary CS, Varalakshmi P, Rai SK, Kumar BA, Kumbhakar P. A Novel Technique of Synthesis of Highly Fluorescent Carbon Nanoparticles from Broth Constituent and In-vivo Bioimaging of C. elegans. J Fluoresc 2016; 26:1541-8. [DOI: 10.1007/s10895-016-1854-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2016] [Accepted: 06/14/2016] [Indexed: 10/21/2022]
|
15
|
Pramanik A, Biswas S, Kole AK, Tiwary CS, Krishnaraj RN, Kumbhakar P. Template-free hydrothermal synthesis of amphibious fluorescent carbon nanorice towards anti-counterfeiting applications and unleashing its nonlinear optical properties. RSC Adv 2016. [DOI: 10.1039/c6ra20442b] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Bio-precursor based synthesis and counterfeiting applications of water-soluble, blue fluorescent carbon nanorice structures with good nonlinear optical properties are demonstrated.
Collapse
|
16
|
Mondal A, Pramanik A, Bhowal A, Datta S. Distillation studies in rotating packed bed with split packing. Chem Eng Res Des 2012. [DOI: 10.1016/j.cherd.2011.08.008] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
17
|
Neethling JB, Clark D, Pramanik A, Stensel HD, Sandino J, Tsuchihashi R. WERF Nutrient Challenge investigates limits of nutrient removal technologies. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2010; 61:945-953. [PMID: 20182073 DOI: 10.2166/wst.2010.617] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The WERF Nutrient Challenge is a multi-year collaborative research initiative established in 2007 to develop and provide current information about wastewater treatment nutrients (specifically nitrogen and phosphorus in wastewater), their characteristics, and bioavailability in aquatic environments to help regulators make informed decisions. The Nutrient Challenge will also provide data on nutrient removal so that treatment facilities can select sustainable, cost-effective methods and technologies to meet permit limits. To meet these goals, the Nutrient Challenge has teamed with a wide array of utilities, agencies, consultants, universities and other researchers and practitioners to collaborate on projects that advance these goals. The Nutrient Challenge is focusing on a different approach to collaborating and leveraging resources (financial and intellectual) on research projects by targeting existing projects and research that correspond with its goals and funding those aspects that the Nutrient Challenge identified as a priority. Because the Nutrient Challenge is focused on collaboration, outreach is an absolutely necessary component of its effectiveness. Through workshops, webinars, a web portal and online compendium, published papers, and conference lectures, the Nutrient Challenge is both presenting important new information, and soliciting new partnerships.
Collapse
|
18
|
Mitra S, Pramanik A, Chakrabarty D, Jurányi F, Gautam S, Mukhopadhyay R. Diffusion of water adsorbed in hydrotalcite: neutron scattering Study. ACTA ACUST UNITED AC 2007. [DOI: 10.1088/1742-6596/92/1/012167] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
19
|
Thakkar GN, Gandhi VS, Rajput DK, Pramanik A. Radiological quiz - musculoskeletal. Indian J Radiol Imaging 2006. [DOI: 10.4103/0971-3026.32409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
|
20
|
Vukojević V, Pramanik A, Yakovleva T, Rigler R, Terenius L, Bakalkin G. Study of molecular events in cells by fluorescence correlation spectroscopy. Cell Mol Life Sci 2005; 62:535-50. [PMID: 15747060 PMCID: PMC11365878 DOI: 10.1007/s00018-004-4305-7] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
To understand processes in a living cell, sophisticated and creative approaches are required that can be used for gathering quantitative information about large number of components interacting across temporal and spatial scales without major disruption of the integral network of processes. A physical method of analysis that can meet these requirements is fluorescence correlation spectroscopy (FCS), which is an ultrasensitive and non-invasive detection method capable of single-molecule and real-time resolution. Since its introduction about 3 decades ago, this until recently emerging technology has reached maturity. As commercially built equipment is now available, FCS is extensively applied for extracting biological information from living cells unattainable by other methods, and new biological concepts are formulated based on findings by FCS. In this review, we focus on examples in the field of molecular cellular biology. The versatility of the technique in this field is illustrated in studies of single-molecule dynamics and conformational flexibility of proteins, and the relevance of conformational flexibility for biological functions regarding the multispecificity of antibodies, modulation of activity of C5a receptors in clathrin-mediated endocytosis and multiplicity of functional responses mediated by the p53 tumor suppressor protein; quantitative characterization of physicochemical properties of the cellular interior; protein trafficking; and ligand-receptor interactions. FCS can also be used to study cell-to-cell communication, here exemplified by clustering of apoptotic cells via bystander killing by hydrogen peroxide.
Collapse
|
21
|
McCann P, Pramanik A. Dysphagia and unexpected myasthenia gravis associated with primary biliary cirrhosis, ulcerative colitis and vitiligo. J Am Geriatr Soc 2004; 52:1407-8. [PMID: 15271143 DOI: 10.1111/j.1532-5415.2004.52379_7.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
22
|
Vathsala PG, Pramanik A, Dhanasekaran S, Devi CU, Pillai CR, Subbarao SK, Ghosh SK, Tiwari SN, Sathyanarayan TS, Deshpande PR, Mishra GC, Ranjit MR, Dash AP, Rangarajan PN, Padmanaban G. Widespread occurrence of the Plasmodium falciparum chloroquine resistance transporter (Pfcrt) gene haplotype SVMNT in P. falciparum malaria in India. Am J Trop Med Hyg 2004; 70:256-9. [PMID: 15031513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023] Open
Abstract
The Plasmodium falciparum chloroquine resistance transporter (Pfcrt) K76T mutation and haplotype (amino acids 72-76) and the P. falciparum multidrug resistance 1 (Pfmdr1) mutation (N86Y) were analyzed as markers of chloroquine resistance in the DNAs of 73 blood samples from patients with P. falciparum malaria in India. Seventy of the 73 DNAs had the Pfcrt K76T mutation. Of these, 66 had the SVMNT haplotype and four had CVIET, the African/Southeast Asian haplotype. Only 20 of 69 DNAs had the Pfmdr1 N86Y mutation. It is surprising that the Pfcrt haplotype in India is predominantly SVMNT, rather than that seen in Southeast Asia. The widespread prevalence of the Pfcrt K76T mutation is a cause for concern.
Collapse
|
23
|
Martinez M, Pramanik A, Moto-Ndje S, Moore CW. Overexpression of genes involved in vesicular trafficking to the vacuole defends against lethal effects of oxidative damage. Cell Mol Biol (Noisy-le-grand) 2003; 49:1025-35. [PMID: 14682384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
Anticancer bleomycins and structurally-related analogs are oxidative agents that mimic ionizing radiation in many of their cellular effects. The current study was designed to better understand this class of radiomimetic and oxidative drugs, and how cells defend against them to become resistant. Based on some of the properties conferred by the blm5-1 mutation of Saccharomyces cerevisiae, a multi-step cloning strategy was developed to search for genes that protect cells against oxidative damage and lethal effects of bleomycin treatments. The strategy employed blm5-1 mutant strains to search for genes that rescued the drug hypersensitivities conferred by the mutation, and utilized the inability of homozygous blm5-1 mutant diploid strains to grow at elevated temperatures. This approach identified the VPS3, VPS8 and PEP7 genes that function in vesicular trafficking between the endosome and the yeast vacuole via the carboxypeptidase Y (CpY) pathway. Mutant blm5-1 strains possess several phenotypic characteristics consistent with CpY mutants, including reduced mitotic growth rates and sporulative abilities. However, blm5-1 strains were not found to be defective in the transport of CpY into the vacuole. We suggest that the ability of the VPS3, VPS8 and PEP7 genes to rescue lethal effects of oxidative damage resulted from the overexpression of these genes.
Collapse
|
24
|
Martinez M, Pramanik A, McKoy J, Robert K, Moore CW. Pleiotrophic cellular deficiencies conferred by the blm5-1 mutation of Saccharomyces cerevisiae. Cell Mol Biol (Noisy-le-grand) 2003; 49:1049-56. [PMID: 14682386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
Mutational alteration of the BLM5 gene of the model eukaryote, Saccharomyces cerevisiae, confers extreme hypersensitivities to lethal effects of ionizing radiation, anticancer bleomycins and structurally-related phleomycins. Additional properties conferred by the blm5-1 mutation in haploid and diploid strains were investigated for the current report. Only one copy of blm5-1 together with the normal BLM5 allele was sufficient to produce mitotic and meiotic defects in diploids, and greatly increase killing by bleomycin beyond wild type levels. Mitotic growth rates of blm5-1/blm5-1 homozygous mutant strains were slower than wild type or BLM5/blm5-1 heterozygous strains at 30 degrees C, and growth was nearly completely inhibited at 37 degrees C. Meiosis was inhibited at 30 degrees C and 37 degrees C in mutant homozygotes, and at 37 degrees C in BLM5/blm5-1 heterozygotes, while meiosis occurred at equivalent frequencies in wild type strains at both temperatures. Surprisingly, mutant strains were found to associate extremely low quantities of [S-methyl-3H]bleomycin A2, in contrast to normal strains that associated quite high amounts. However, the fractions of the total associated radioactivities that were released from normal and blm5-1 cells were equivalent. These results suggested that the extremely high killing suffered by blm5-1 mutant strains in response to bleomycin treatments results from something other than increased intracellular drug concentrations.
Collapse
|
25
|
Richards JD, Pramanik A, Sykes L, Pomeroy VM. A comparison of knee kinematic characteristics of stroke patients and age-matched healthy volunteers. Clin Rehabil 2003; 17:565-71. [PMID: 12952165 DOI: 10.1191/0269215503cr651oa] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To investigate which knee kinematic characteristics show the greatest differences between stroke patients with minimal residual disability and age-matched healthy volunteers as a first step towards the development of a sensitive, objective measure of performance of movement for use in the clinical setting. DESIGN A comparative study. SETTING A movement analysis laboratory. SUBJECTS Ten patients between 6 and 12 months post stroke aged between 65 and 74 years and 10 age-matched healthy volunteers. All patients had made a good recovery and were able to complete all of the functional tasks. INTERVENTIONS Each subject had reflective markers placed on anatomical landmarks and was filmed performing three movement tasks: sit-to-stand, walking, and step on block. MAIN OUTCOME MEASURES Knee kinematic characteristics involving timing, joint angle and angular velocity at key points during each task. RESULTS Significant differences were found between patients and volunteers for only some of the timing and joint angle characteristics but for all angular velocity characteristics for which the mean differences ranged from 31.85 degrees/s for sit-to-stand (p = 0.013) to 82.5 degrees/s (p = 0.014) for the swing phase of gait. CONCLUSIONS These preliminary findings suggest that angular velocity of the knee during functional tasks might have potential as a sensitive, objective measure of performance of movement after stroke for patients with minimal residual disability.
Collapse
|