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1.
Toxicol Ind Health ; 40(1-2): 9-22, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-37877376

RESUMO

The present study aimed to determine the prevalence of musculoskeletal pain, unfavorable working conditions, and assessment of occupational injuries among sawmill workers. The Nordic Musculoskeletal Questionnaire, measurement of handgrip strength, working environment, and occupational injuries were assessed among 135 sawmill workers participating in the study. The data showed that sawmill workers complained of discomfort (pain) felt primarily in the low back region of the body followed by the shoulders, hands, knees, upper back, and wrist. This study indicated that sawmill workers had less handgrip strength due to more intense manual work than control subjects. Based on the results of this study, it was concluded that sawmill workers were highly affected due to working in an awkward posture with manual material handling for an extended period of time and that these factors may lead to work-related musculoskeletal disorders as well as occupational injuries. Proper training, a proper work-rest schedule, and modifications of some working procedures may reduce injuries and work-related musculoskeletal pain.


Assuntos
Doenças Musculoesqueléticas , Dor Musculoesquelética , Doenças Profissionais , Traumatismos Ocupacionais , Humanos , Dor Musculoesquelética/epidemiologia , Dor Musculoesquelética/etiologia , Traumatismos Ocupacionais/epidemiologia , Traumatismos Ocupacionais/etiologia , Força da Mão , Doenças Profissionais/epidemiologia , Doenças Profissionais/etiologia , Doenças Musculoesqueléticas/epidemiologia , Doenças Musculoesqueléticas/etiologia , Inquéritos e Questionários , Índia/epidemiologia , Prevalência
2.
Toxicol Ind Health ; 40(6): 293-305, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38569528

RESUMO

The Brickfield Industry is the major and oldest informal industry in India, where millions of brickfield workers make their livelihood. Aged brickfield workers are also involved in different activities in the brickfield, especially in brick mold activities owing to poor socioeconomic conditions. A cross-sectional study was designed to determine the prevalence of work-related musculoskeletal disorders among the aged brick molders and compare them with aged control subjects. A Nordic Questionnaire was applied to assess the discomfort felt among both groups of workers and the Rapid Upper Limb Assessment (RULA) method was used to evaluate posture during their job. The RULA posture analysis showed that the posture adopted by aged brick molders required changes immediately. The result of the ART tool also stated that the brick molding activities' exposure level was high and required further investigation urgently. The study concluded that due to working in a forward bending posture for a prolonged period, aged brickmolders suffered from severe low back and knee pain along with upper-limb disorders due to repetitive activities.


Assuntos
Indústria da Construção , Doenças Musculoesqueléticas , Doenças Profissionais , Postura , Humanos , Índia/epidemiologia , Estudos Transversais , Doenças Musculoesqueléticas/epidemiologia , Doenças Profissionais/epidemiologia , Prevalência , Masculino , Pessoa de Meia-Idade , Medição de Risco , Adulto , Inquéritos e Questionários , Feminino
3.
Bioorg Med Chem ; 78: 117131, 2023 01 15.
Artigo em Inglês | MEDLINE | ID: mdl-36571976

RESUMO

To follow up on our previous report on bivalent compounds exhibiting potent co-operative binding at dopamine D2 receptors, we modified the structure of the linker in our earlier bivalent molecules (S)-6-((9-(((R)-5-hydroxy-1,2,3,4-tetrahydronaphthalen-2-yl)(propyl)amino)nonyl)-(propyl)amino)-5,6,7,8-tetrahydronaphthalen-1-ol (Ia) and (S)-6-((10-(((R)-5-hydroxy-1,2,3,4-tetrahydronaphthalen-2-yl)(propyl)amino)decyl)(propyl)amino)-5,6,7,8-tetrahydronaphthalen-1-ol (Ib) (Fig. 1) connecting the two pharmaophoric moieties to observe any tolerance in maintaining similar affinities and potencies. Specifically, we introduced aromatic and piperazine moieties in the linker to explore their effect. Overall, similar activities at D2 receptors as observed in our earlier study was maintained in the new molecules e.g. (6S,6'S)-6,6'-((1,4-phenylenebis(ethane-2,1-diyl))bis(propylazanediyl))bis(5,6,7,8-tetrahydronaphthalen-1-ol) (D-382) (Ki, D2 = 3.88 nM). The aromatic moiety in D-382 was next functionalized by introducing hydroxyl groups to mimic polyhydroxy natural products which are known to interact with amyloidogenic proteins. Such a transformation resulted in development of compounds like 2,5-bis(2-(((S)-5-hydroxy-1,2,3,4-tetrahydronaphthalen-2-yl)(propyl)amino)ethyl)benzene-1,4-diol (D-666) (Ki, D2 = 7.62 nM) which retained similar affinity and potency at D2 receptors. Such dihydroxyl compounds turned out to be potent inhibitors against aggregation and toxicity of recombinant alpha synuclein protein. The work reported here is in line with our overall goal to develop multifunctional dopamine agonist for symptomatic and disease modifying treatment of Parkinson's disease.


Assuntos
Agonistas de Dopamina , Receptores de Dopamina D2 , alfa-Sinucleína , Agonistas de Dopamina/farmacologia , Agonistas de Dopamina/química , Piperazinas/farmacologia , Receptores de Dopamina D1 , Receptores de Dopamina D2/metabolismo , Receptores de Dopamina D3/agonistas
4.
Toxicol Ind Health ; 37(8): 481-495, 2021 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-34132145

RESUMO

Child labor is an infraction of fundamental human rights, and it prevents the children's physical, psychosocial, and psychological development. In India, children have been working in different unorganized sectors as paid laborers. Children were found performing a fair amount of manual, rigorous tasks in the brickfield industry due to socioeconomic disadvantages. Child brickfield workers suffered from musculoskeletal pain and injuries due to working with a heavy physical workload, which hampers the overall quality of life. A study had been conducted among these child brickfield laborers from India during 2011-2017. The study found laceration (38.7% male and 36.9% female) as the primary injury followed by sprain and strain, scratches, avulsion, and fractures among child brickfield workers. The study shows that child workers are highly prone to injuries, mainly toe (23.9% male and 28.1% female), hands (22.0% male and 23.4% female), wrists, feet, ankles, and fingers. The injury rate among male and female child brickfield laborers was 7.64 and 9.52 per 1000 workers. The primary source of injuries in brickfields was due to falling from height. Several risk factors, including biomechanical, work stress, may play a key role in work-related injuries among child brickfield laborers.


Assuntos
Acidentes de Trabalho/estatística & dados numéricos , Trabalho Infantil/estatística & dados numéricos , Doenças Musculoesqueléticas/epidemiologia , Doenças Musculoesqueléticas/etiologia , Traumatismos Ocupacionais/epidemiologia , Adolescente , Criança , Indústria da Construção , Estudos Transversais , Ergonomia , Feminino , Humanos , Índia/epidemiologia , Masculino , Dor Musculoesquelética , Fatores de Risco , Carga de Trabalho
5.
Toxicol Ind Health ; 36(5): 371-385, 2020 May.
Artigo em Inglês | MEDLINE | ID: mdl-32546106

RESUMO

The main aim of this cross-sectional study was to evaluate work-related injuries (WRI) and the self-reported musculoskeletal symptoms among 742 railway track maintainers. The second aim of this study was to investigate the potential factors related to the prevalence of musculoskeletal disorders (MSDs) in track maintainers. This study also tried to do planning and implementing ergonomic intervention programs to improve track maintainer's health. Modified Nordic questionnaires were administered to assess the prevalence of MSDs. Detailed posture analysis by rapid entire body assessment (REBA) method was performed to assess the risk level of concerned postures. The injury data for 12 months were collected by conducting a survey and personal interviews with the affected railway track maintainers. To assess the prevalence of MSDs, the odds ratio and 95% confidence interval were computed along with critical χ 2 values. Analysis of variance was performed to determine significant differences between the MSD present and absent among the track maintainers of the Indian railway. The result of this study showed that neglect of safety precautions is the main reason for injury, followed by slipping and falling and lack of awareness. Sprain injury is one of the main injuries, followed by cut, snakebite, abrasion, and fracture. Low educational levels of workers are also reasons for WRI. In conclusion, the prevalence and severity of MSD, particularly in the low back, knees, wrist, and shoulder and WRI were found to be very high among the track maintainers. The recommendations of this research are ergonomic interventions, such as track maintainers proper training, following the National Institute of Occupational Safety and Health -recommended weight limit for manual material handling, modification in hand tools, job rotation, performing stretching exercise, and avoiding awkward and static posture are needed.


Assuntos
Doenças Musculoesqueléticas/epidemiologia , Doenças Musculoesqueléticas/etiologia , Doenças Profissionais/epidemiologia , Doenças Profissionais/etiologia , Traumatismos Ocupacionais/epidemiologia , Adulto , Estudos Transversais , Ergonomia , Feminino , Humanos , Índia/epidemiologia , Masculino , Pessoa de Meia-Idade , Postura , Ferrovias , Fatores de Risco , Inquéritos e Questionários , Adulto Jovem
6.
Environ Health Prev Med ; 20(5): 360-8, 2015 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-26154684

RESUMO

OBJECTIVES: The purpose of the study was to determine the prevalence of low back pain (LBP) among brick field workers and to explore attributed causes of LBP, investigate the relationship between LBP and psychophysical and psychosocial factors and measure the impact of LBP. METHODS: A modified Nordic Musculoskeletal Disorder Questionnaire along with Body Part Discomfort scale were administered to brick field workers (N = 148). Working posture of the participants was assessed using Rapid Entire Body Assessment (REBA) method. RESULTS: The study showed that 70 % of the female workers reported LBP due to awkward working posture for prolonged period of time. This was mainly reported by brick moulders. 45 % reported LBP due to manual material handling (MMH) and 40 % due to awkward lifting of heavy objects (brick). The study shows that the LBP is more prevalent (OR 1.59 and 95 % CI 0.411-6.207). 78 % of the female workers want the job rotation to relieve from their job monotony. CONCLUSIONS: LBP occurred among female workers due to awkward posture, repetitive work and MMH. This study also stated that psychosocial cause of LBP is inadequacy income, monotony work, job dissatisfaction. Working posture analysis REBA suggests that all the working postures are high-risk level.


Assuntos
Indústria da Construção , Dor Lombar/epidemiologia , Doenças Profissionais/epidemiologia , Postura , Adulto , Feminino , Humanos , Índia/epidemiologia , Dor Lombar/etiologia , Pessoa de Meia-Idade , Doenças Profissionais/etiologia , Prevalência , Adulto Jovem
7.
Environ Health Prev Med ; 19(3): 226-33, 2014 May.
Artigo em Inglês | MEDLINE | ID: mdl-24609959

RESUMO

OBJECTIVES: Lung function tests have become an integral part of assessment of pulmonary disease. Diseases of the respiratory system induced by occupational dusts are influenced by the duration of exposure. The aim of the study is to investigate the impairment of lung function and prevalence of respiratory symptoms among the rice mill workers. METHODS: A total of 120 rice mill workers from three districts of Karnataka were included in this study. Fifty urban dwellers from the same socio-economic level were selected as controls. The study included clinical examination, assessment of respiratory symptoms, pulmonary function test, measurement of peak expiratory flow rate, absolute eosinophil count, ESR estimation, total IgE estimation and radiographic test. RESULTS: The present study has shown that the rice mill workers complained of several types of respiratory disorders like phlegm (40.8 %), dyspnea (44.2 %), chest tightness (26.7 %), cough (21.7 %), and nose irritation (27.5 %). Rice mill workers exposed to dust presented significantly (p < 0.05) lower levels of FVC (3.44 ± 0.11), FEV1 (2.73 ± 0.15) and PEFR (304.95 ± 28.79) than the controls. The rice mill workers are having significantly higher absolute eosinophil counts, total IgE and ESR than control groups. The hematological findings suggest that the harmful effects may be linked to both non-specific irritation and allergic responses to rice husk dust among rice mill workers. CONCLUSION: Dust exposure in the working environment affects the lung function values and increased the respiratory symptoms among the rice mill workers.


Assuntos
Exposição Ocupacional , Doenças Respiratórias/epidemiologia , Adulto , Poeira , Feminino , Humanos , Índia/epidemiologia , Masculino , Oryza , Pico do Fluxo Expiratório , Prevalência , Testes de Função Respiratória , Doenças Respiratórias/induzido quimicamente
8.
Work ; 76(1): 225-241, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36806533

RESUMO

BACKGROUND: Indian farmers have musculoskeletal disorders as agriculture is a physically demanding occupation. OBJECTIVES: The main aim of this study is to identify ergonomic and psychosocial risk factors associated with musculoskeletal disorders (MSDs) among different groups of farmers. The other objective is to investigate how MSDs affect farmers' daily lives and interfere with their activities. METHODS: Farmers were evaluated for the repetitiveness of work and MSDs using the standard Nordic questionnaire, ergonomic assessment tool (REBA), and ART tool. RESULTS: Low back portions were the most affected body parts, followed by the knees (OR = 0.352; 95% CI = 0.280-0.598), shoulder (OR = 0.657; 95% CI = 0.405-1.066), neck (OR = 0.510; 95% CI = 0.350-0.743), ankle or foot (OR = 0.815; 95% CI = 0.556-1.196), and upper back region (OR = 0.681; 95% CI = 0.463-1.002). The REBA method found that most of the postures in farming are very dangerous. The ART tool showed that most of the activities are repetitive. Working long hours (90%) and monotony at work (87.5%) are the main psychosocial factors, followed by pressure to finish within a given timeframe (71.4%) and injuries related to MSDs. CONCLUSION: Farmers suffer from musculoskeletal disorders in various body parts (lower back, knee, neck, shoulder, and upper back) due to squatting, stooping, and other constrained working postures during agricultural activities. rolonged working hours, repetitive movements, and MMH are ergonomic risk factors forFurthermore, p MSDs.


Assuntos
Doenças Musculoesqueléticas , Doenças Profissionais , Humanos , Fazendeiros , Medição de Risco , Agricultura/métodos , Fatores de Risco , Doenças Musculoesqueléticas/epidemiologia , Doenças Musculoesqueléticas/etiologia , Doenças Musculoesqueléticas/prevenção & controle , Ergonomia/métodos , Inquéritos e Questionários , Doenças Profissionais/epidemiologia , Doenças Profissionais/etiologia , Doenças Profissionais/prevenção & controle , Prevalência
9.
ACS Chem Neurosci ; 14(5): 885-896, 2023 03 01.
Artigo em Inglês | MEDLINE | ID: mdl-36749600

RESUMO

Aggregation of misfolded α-synuclein (α-syn) protein in the periphery and central nervous system (CNS) gives rise to a group of disorders, which are labeled collectively as synucleinopathies. These clinically distinct disorders are known as pure autonomic failure, Parkinson's disease (PD), Parkinson's disease dementia (PDD), dementia with Lewy bodies (DLB), and multiple system atrophy (MSA). In the case of PD, it has been demonstrated that toxic aggregates of α-syn protein not only cause apoptosis of dopamine neurons but its accumulation in the neocortex and limbic area principally contributes to dementia. In our multifunctional drug discovery research for PD, we converted one of our catechol-containing lead dopamine agonist molecules D-520 into its prodrug D-685. The prodrug exhibited higher in vivo anti-Parkinsonian efficacy in a reserpinized PD animal model than the parent D-520 and exhibited facile brain penetration. In our study with an α-syn transgenic animal model (D line) for PD and dementia with Lewy bodies (DLB), we have shown that 1 month of chronic treatment with the compound D-685 was sufficient to reduce the accumulation of α-syn and phospho-α-syn in the cortex, hippocampus, and striatum areas significantly compared to the control tg mice. Furthermore, D-685 did not exhibit any deleterious effect in the CNS as was evident from the neuron and microglia studies. Future studies will further explore in depth the potential of D-685 to modify disease progression while addressing symptomatic deficits.


Assuntos
Demência , Doença por Corpos de Lewy , Doença de Parkinson , Pró-Fármacos , Humanos , Camundongos , Animais , Doença de Parkinson/tratamento farmacológico , Doença de Parkinson/metabolismo , alfa-Sinucleína/metabolismo , Modelos Animais de Doenças
10.
Int J Occup Saf Ergon ; 18(4): 531-40, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-23294657

RESUMO

Sixty female prawn seed collectors and 60 female control subjects from Sajenakhali and Sandeshkhali blocks of Sunderbans, West Bengal, India, were randomly selected to evaluate and compare musculoskeletal disorders and physiological stress. The control group was engaged in domestic work involving minimum hand intensive activities. The modified Nordic musculoskeletal questionnaire and rapid entire body assessment were used. Most subjects suffered from discomfort in different body parts, especially in the lower back (98%), knees (88%), shoulders (75%), ankles (70%) and feet (67%). This study reveals that female prawn seed collectors suffer from significant physiological load and extreme physiological stress due to prolonged working hours in a standing posture and excessive work pressure. Consequently, all these factors affect female prawn seed collectors' health and work performance.


Assuntos
Aquicultura , Doenças Musculoesqueléticas/epidemiologia , Doenças Profissionais/epidemiologia , Adulto , Pesos e Medidas Corporais , Ergonomia , Feminino , Força da Mão , Frequência Cardíaca , Humanos , Índia/epidemiologia , Doenças Musculoesqueléticas/fisiopatologia , Doenças Profissionais/fisiopatologia , Saúde Ocupacional , Dor/epidemiologia , Inquéritos e Questionários
11.
Work ; 72(3): 967-977, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35634829

RESUMO

BACKGROUND: Rice farming is considered the most crucial industry in India, where millions of farmers suffer from LBP. OBJECTIVES: The present study's primary objectives were to evaluate the prevalence of low back pain among India's rice farmers and determine the relationship between low back pain and ergonomic risk factors and psychosocial factors encountered by the farmers. METHODS: Socio-demographics, ergonomics risk factors and psychosocial factors that cause LBP among rice farmers were examined. Modified Nordic Musculoskeletal Questionnaire and Oswestry LBP Questionnaire were administered among the farmers to evaluate the LBP. Univariate analysis was done to find out the odds ratios and 95% confidence intervals among the farmers. RESULTS: The primary findings from this study regarding the psychosocial factors, such as perceived inadequacy of income (84.7%), job demands (78.1%), work demand targets specific productivity (76.5%), rigidity in work methods (75.3%), monotony at work (73.2 %), have a relationship with LBP. The results also revealed that the relationship between the low back pain and ergonomic risk factors, such as repetitiveness (OR- 4.215; 95% CI- 2.551-6.965), working in awkward posture (OR- 85.82; 95% CI- 43.134-170.77), lifting loads (OR- 0.281; 95% CI- 0.125-0.324), pulling loads (OR- 0.274; 95% CI- 0.173-0.434), showed significant relationship with LBP in the univariate analysis. CONCLUSIONS: The prevalence of LBP among rice farmers connected with ergonomic and psychosocial risk factors. The awkward posture, MMH (lifting and carrying) are the main causative factors of LBP.


Assuntos
Dor Lombar , Doenças Profissionais , Oryza , Ergonomia , Fazendeiros , Humanos , Dor Lombar/epidemiologia , Dor Lombar/etiologia , Dor Lombar/psicologia , Doenças Profissionais/epidemiologia , Doenças Profissionais/etiologia , Doenças Profissionais/psicologia , Prevalência , Fatores de Risco , Inquéritos e Questionários
12.
Work ; 70(2): 571-582, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34657865

RESUMO

BACKGROUND: Musculoskeletal disorders are one of the major health hazards among farmers. Pre-adolescents are mainly associated with agricultural work due to poor socioeconomic conditions. OBJECTIVES: This study aims to implement a new ergonomics aid for the betterment of job procedures and improvement of productivity, health, and safety of the preadolescent farmers. METHODS: 100 male and 100 female preadolescent farmers were randomly selected from the villages of Tarakeswar, West Bengal, India, to evaluate and reduce work-related musculoskeletal disorders, physiological stress. Modified Nordic questionnaires, Body Part Discomfort (BPD) scale, and handgrip strength were assessed before and after using the ergonomics aid. RESULTS: The results of the study show that there was a significant change (decrease) in discomfort in the lower back, wrists, shoulder, and hands among preadolescent farmers when using the newly designed ergonomic aid. Handgrip strength increased and physiological stress was decreased among preadolescent farmers in post-intervention than pre-intervention in just after work conditions. Productivity has been increased in farming by decreasing absenteeism from work with the use of ergonomic aid. CONCLUSION: This study concludes that productivity has been increased in farming by decreasing absenteeism from work as well as by using the ergonomic aid the discomfort feeling has been decreased markedly.


Assuntos
Doenças Musculoesqueléticas , Doenças Profissionais , Adolescente , Ergonomia , Fazendeiros , Feminino , Força da Mão , Humanos , Índia , Masculino , Doenças Musculoesqueléticas/epidemiologia , Doenças Musculoesqueléticas/etiologia , Doenças Profissionais/epidemiologia , Postura , Inquéritos e Questionários , Carga de Trabalho
13.
Chemistry ; 16(25): 7554-62, 2010 Jul 05.
Artigo em Inglês | MEDLINE | ID: mdl-20486108

RESUMO

A novel trifluoroethoxy (TFEO)-coated SubPc (1) and various axially functionalised derivatives thereof (2) have been efficiently synthesised. The advantage of the TFEO-coating on SubPcs compared to conventional fluorine-coated or uncoated molecules has been clearly demonstrated, as axial derivatisation has been realised in very good yields. Among various SubPcs synthesised, formyl-SubPc 2f has been further used as a building block for the synthesis of donor-acceptor SubPc-C(60) hybrid 8, while iodo-SubPc 2e has been used for the synthesis of trifluoroethoxy-coated SubPc-Pc dyads 9 and 10. All of these compounds are highly soluble in all common organic solvents, which greatly facilitates their purification and characterisation. The SubPcs 2a-c incorporating oligoethylene glycol moieties are attractive from a biological point of view, while SubPcs 8-10 may prove useful for studies of intramolecular electron- and energy-transfer processes.

14.
Cent Eur J Public Health ; 18(1): 38-42, 2010 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-20586229

RESUMO

The sand core making process is performed manually in West Bengal involving a large number of workers of lowest economic strata. The core making workers most often work for a prolonged period of time and they are forced to handle various amounts of heavy load during the entire period of work. In this study an attempt was made to identify the work related musculoskeletal disorders among the sand core-making workers. Fifty male workers engaged in carbon dioxide and chemical core making work at an unorganized sector at Baruipur, Calcutta were randomly selected for this study. A detailed modified Nordic questionnaire study on discomfort feeling was performed among the core making workers. REBA method was applied to analyze the working posture. Finally, discomfort level and risk level of the individual working postures were calculated by the use of risk level and discomfort level scale. From the questionnaire study it was revealed that most of the core making workers grind often in awkward postures. The workers were affected by musculoskeletal disorders like pain at low back (100%), hand (40%), shoulder (30%), wrist (20%) and neck (20%). It has been also found that there is a significant (p < 0.05) correlation between discomfort level and risk level of the individual working postures of the workers. It was concluded from the study that health of the core-making workers was highly affected by different awkward postures and that they suffer from posture-related musculoskeletal disorders primarily affecting the low back region.


Assuntos
Sistemas Homem-Máquina , Doenças Musculoesqueléticas/etiologia , Doenças Profissionais/etiologia , Postura , Adulto , Indústrias Extrativas e de Processamento , Humanos , Incidência , Índia/epidemiologia , Entrevistas como Assunto , Masculino , Doenças Musculoesqueléticas/epidemiologia , Doenças Profissionais/epidemiologia , Risco , Dióxido de Silício , Adulto Jovem
15.
Int J Occup Saf Ergon ; 16(1): 69-79, 2010.
Artigo em Inglês | MEDLINE | ID: mdl-20331920

RESUMO

Stonecutting and setting are important tasks in a construction site. A field study was conducted to assess occupational-related disorders and to conduct ergonomics assessment among stonecutters. The study focused on (a) the duration of work per day, (b) the working environment and working activities and (c) the feeling of discomfort in different parts of the body. A detailed posture analysis was performed with the Ovako working posture analysis system (OWAS). It was observed that stonecutters worked continuously in awkward postures during stonecutting and setting. Consequently, they suffered from discomfort in different parts of their body, specifically in the lower back, knees and shoulders, which mainly prevented them from continuing their work. This study also revealed that stonecutters had to work in congested work areas with a poor level of illumination. The noise level and dust particles emitted during stonecutting activities could affect stonecutters.


Assuntos
Doenças Musculoesqueléticas/etiologia , Doenças Profissionais/etiologia , Postura , Análise e Desempenho de Tarefas , Adolescente , Adulto , Carbonato de Cálcio , Estudos de Casos e Controles , Humanos , Índia/epidemiologia , Masculino , Pessoa de Meia-Idade , Doenças Musculoesqueléticas/epidemiologia , Doenças Profissionais/epidemiologia , Prevalência , Local de Trabalho , Adulto Jovem
16.
Work ; 63(3): 389-403, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31282450

RESUMO

BACKGROUND: The manual brick field industry is one of the most important and oldest industries in India, where millions of male and female workers make their livelihood. OBJECTIVE: To estimate the different ergonomic risk factors associated with brick making, identify potential gender differences and the prevalence of Work-related musculoskeletal disorders (WMSDs), physiological and psychological stress among the brickfield workers. METHODS: Brickfield workers - 152 male and 148 female were randomly selected from the 12 brickfields. The Modified Nordic Questionnaire was applied to assess the discomfort reported among both groups of brickfield workers. Objective measurement of physiological parameters and lung function values were also recorded. RESULTS: From this study, it was revealed that there is significantly higher discomfort reported in hands, lower back and knees among female brick molders than male brick molders. The physiological parameters did not show any significant change between male brickfield workers and female brickfield workers. The mean values of FVC, FEV1 and PEFR for females were lower than those for male brickfield workers. CONCLUSION: This study concludes that female brickfield workers reported more discomfort than male brickfield workers; perhaps in part due to their additional domestic work responsibilities.


Assuntos
Indústria da Construção/métodos , Doenças Musculoesqueléticas/classificação , Fatores Sexuais , Estresse Fisiológico/fisiologia , Adulto , Análise de Variância , Índice de Massa Corporal , Feminino , Humanos , Índia/epidemiologia , Masculino , Doenças Musculoesqueléticas/epidemiologia , Medição da Dor/métodos , Postura/fisiologia , Prevalência , Inquéritos e Questionários
17.
Int Health ; 11(4): 250-257, 2019 07 01.
Artigo em Inglês | MEDLINE | ID: mdl-30329072

RESUMO

AIMS: The purpose of this study was to describe the health hazards among child labourers in brickfields, and to assess occupational health problems, together with physiological and respiratory stress, compared with child control subjects. METHODS: A cross-sectional study was conducted on 112 child brickfield workers and 120 control subjects, and a modified Nordic Questionnaire was applied to assess the discomfort felt among both groups of workers. Physiological assessment of the workload was carried out by the measurement of heart rate, blood pressure and spirometry of the workers. RESULTS: Child brickfield workers suffer from pain, especially in the lower back (97%), shoulder (88%), hands (82%), wrist (76%), neck (73%) and ankle (71%). The post-activity heart rate of the child brickfield workers was 166.5 beats/min, whereas the systolic and diastolic blood pressures were 132.2 and 67.2 mm/Hg, respectively. The forced vital capacity value of child brickfield workers was 2.04, and in the case of the controls it was 2.18, which was significantly different. The forced expiratory volumes in 1 s of experimental and control subjects were 1.82 and 1.92, respectively. The peak expiratory flow rate was significantly different between the two groups. CONCLUSIONS: Most of the brick-making activities were strenuous ones that affected the children. The cardiovascular and respiratory health of the child brickfield workers has changed markedly due to strenuous activity. The child brickfield workers also experienced other occupational health problems and severe musculoskeletal pain.


Assuntos
Saúde da Criança , Trabalho Infantil , Indústria Manufatureira , Doenças Musculoesqueléticas/etiologia , Exposição Ocupacional/efeitos adversos , Dor/etiologia , Carga de Trabalho , Adolescente , Pressão Sanguínea , Criança , Estudos Transversais , Feminino , Frequência Cardíaca , Humanos , Índia , Masculino , Doenças Profissionais/etiologia , Saúde Ocupacional , Postura , Testes de Função Respiratória , Inquéritos e Questionários
18.
ACS Chem Neurosci ; 10(1): 396-411, 2019 01 16.
Artigo em Inglês | MEDLINE | ID: mdl-30301349

RESUMO

We have developed a series of carbazole-derived compounds based on our hybrid D2/D3 agonist template to design multifunctional compounds for the symptomatic and disease-modifying treatment of Parkinson's disease (PD). The lead molecules (-)-11b (D-636), (-)-15a (D-653), and (-)-15c (D-656) exhibited high affinity for both D2 and D3 receptors and in GTPγS functional assay, the compounds showed potent agonist activity at both D2 and D3 receptors (EC50 (GTPγS); D2 = 48.7 nM, D3 = 0.96 nM for 11b, D2 = 0.87 nM, D3 = 0.23 nM for 15a and D2 = 2.29 nM, D3 = 0.22 nM for 15c). In an animal model of PD, the test compounds exhibited potent in vivo activity in reversing hypolocomotion in reserpinized rats with a long duration of action compared to the reference drug ropinirole. In a cellular antioxidant assay, compounds (-)-11b, (-)-15a, and (-)-15c exhibited potent activity in reducing oxidative stress induced by neurotoxin 6-hydroxydopamine (6-OHDA). Also, in a cell-based PD neuroprotection model, these lead compounds significantly increased cell survival from toxicity of 6-OHDA, thereby producing a neuroprotective effect. Additionally, compounds (-)-11b and (-)-15a inhibited aggregation and reduced toxicity of recombinant alpha synuclein protein in a cell based in vitro assay. These observations suggest that the lead carbazole-based dopamine agonists may be promising multifunctional molecules for a viable symptomatic and disease-modifying therapy of PD and should be further investigated.


Assuntos
Carbazóis/síntese química , Agonistas de Dopamina/síntese química , Desenho de Fármacos , Doença de Parkinson/metabolismo , Animais , Carbazóis/farmacologia , Carbazóis/uso terapêutico , Agonistas de Dopamina/farmacologia , Agonistas de Dopamina/uso terapêutico , Feminino , Masculino , Fármacos Neuroprotetores/síntese química , Fármacos Neuroprotetores/farmacologia , Fármacos Neuroprotetores/uso terapêutico , Estresse Oxidativo/efeitos dos fármacos , Estresse Oxidativo/fisiologia , Oxidopamina/toxicidade , Células PC12 , Doença de Parkinson/tratamento farmacológico , Ratos , Ratos Sprague-Dawley
19.
Eur J Pharmacol ; 862: 172632, 2019 Nov 05.
Artigo em Inglês | MEDLINE | ID: mdl-31473161

RESUMO

Significant unmet needs exist for development of better pharmacotherapeutic agents for major depressive disorder (MDD) and post-traumatic stress disorder (PTSD) as the current drugs are inadequate. Our goal in this study is to investigate behavioral pharmacological characterization of a novel triple reuptake inhibitor (TRI) D-578 which exhibits nanomolar potency at all three monoamine transporters (Ki; 16.2. 16.2, 3.23 nM, and 29.6, 20.6, 6.10 nM for the rat brain and cloned human dopamine, serotonin and norepinephrine transporters, respectively) and exhibited little to no affinity for other off-target CNS receptors. In a rat forced swim test, compound D-578 upon oral administration displayed high efficacy and not stimulating in locomotor behavior. The effects of D-578 and paroxetine were next evaluated in a rat model for traumatic stress exposure - the single prolonged stress (SPS) model - which has been shown to have construct, predictive, and behavioral validity in modeling aspects of PTSD. Our results show that SPS had no effect on the acquisition of conditioned fear, but impaired extinction learning and extinction retention of fear behavior compared to sham treatment. D-578, but not paroxetine, attenuated the extinction and extinction-retention deficit induced by SPS. These findings suggest that D-578 has greater efficacy in normalizing traumatic stress-induced extinction-retention learning in a model for PTSD compared to paroxetine. Overall these results suggest that D-578, in addition to producing a robust and efficacious antidepressant effect, may attenuate maladaptive retention of fearful memories and support further testing of this agent for the pharmacotherapy of depression and PTSD.


Assuntos
Antidepressivos/farmacologia , Transtorno Depressivo Maior/tratamento farmacológico , Inibidores da Captação de Neurotransmissores/farmacologia , Transtornos de Estresse Pós-Traumáticos/tratamento farmacológico , Estresse Psicológico/complicações , Administração Oral , Animais , Antidepressivos/uso terapêutico , Técnicas de Observação do Comportamento , Comportamento Animal/efeitos dos fármacos , Transtorno Depressivo Maior/etiologia , Transtorno Depressivo Maior/psicologia , Modelos Animais de Doenças , Proteínas da Membrana Plasmática de Transporte de Dopamina/antagonistas & inibidores , Avaliação Pré-Clínica de Medicamentos , Humanos , Masculino , Inibidores da Captação de Neurotransmissores/uso terapêutico , Proteínas da Membrana Plasmática de Transporte de Norepinefrina/antagonistas & inibidores , Ratos , Retenção Psicológica/efeitos dos fármacos , Proteínas da Membrana Plasmática de Transporte de Serotonina/metabolismo , Transtornos de Estresse Pós-Traumáticos/etiologia , Transtornos de Estresse Pós-Traumáticos/psicologia , Estresse Psicológico/psicologia
20.
Int J Adolesc Med Health ; 33(4)2018 Dec 10.
Artigo em Inglês | MEDLINE | ID: mdl-30530890

RESUMO

INTRODUCTION: Agricultural injuries are an important factor in mortality and morbidity for populations of preadolescents globally. Working preadolescents in agricultural sector are exposed to occupational risks and injury in India. OBJECTIVE: This study mainly assesses the nature of injuries among the preadolescent agricultural workers of West Bengal, India. METHODS: The survey was done by collecting the data on agricultural injuries from the Hooghly district of West Bengal. The injury data for 7 years between years 2010 and 2016 were collected by conducting a survey and personal interviews with the victims. The questionnaire-based approach was used for data collection information on the injury characteristics. RESULTS: The agricultural injury incident rate was 8.99 (male) and 7.89 (female) per 1000 workers/year. The leading causes of farm injuries were hand tools (65.7%). The most frequently involved tools were spades and sickles. The main cause of hand tool injuries was repetitive work, which lead to fatigue and slippage of hand tools from the hand. The study indicated that preadolescent workers are highly prone to injuries in their occupation, mostly affecting the toes (27.8% and 26.3%) and fingers (24.8% and 25%) in both male and female preadolescents, which consequently affected their health, productivity and work performance. CONCLUSION: This study concludes that (1) agricultural injuries affecting different body parts such as toes, fingers, feet and ankles. (2) Occurrence of injuries was much higher among males than females. (3) Hand tools accounted for the majority of injuries followed by farm machinery. (4) Cut injuries are the main ones followed by lacerations, abrasions, sprains and contusions.

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