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1.
Support Care Cancer ; 32(3): 194, 2024 Feb 27.
Artigo em Inglês | MEDLINE | ID: mdl-38411723

RESUMO

To assess the level of supportive care needs of caregivers of colorectal cancer patients and explore the related key influencing factors. Totaling 283 caregivers of patients with colorectal cancer were investigated in this study. Firstly, caregivers were invited to complete a set of questionnaires, including the general information questionnaire, the Supportive Care Needs Survey-Partners and the Caregivers of cancer patients, the Caregiver Preparedness Scale, the Benefit Finding Scale, and the Comprehensive Score for Financial Toxicity. Univariate and multivariate linear regression were performed to investigate the associated factors of supportive care needs. The caregivers of patients with colorectal cancer have a moderate level of needs, scored at 2.71 ± 0.42. Caregiver preparedness, benefit finding, and financial toxicity were significantly negatively associated with the supportive care needs of caregivers (r = - 0.555, P < 0.001; r = - 0.534, P < 0.001; and r = - 0.615, P < 0.001, respectively). Our multivariate regression analysis identified some factors that directly affected the supportive care needs of caregivers, including the duration of illness, tumor stage, the age and educational level of caregivers, caregiver preparedness, benefit finding, and financial toxicity (R2 = 0.574, F = 23.337, P < 0.001). Supportive care needs are common among caregivers of colorectal cancer patients. Higher caregiver preparedness, benefit finding, and financial toxicity tend to ease these needs. Healthcare workers should have an in-depth understanding of the needs of caregivers of colorectal cancer patients and actively provide targeted financial/informational/technical/emotional support to promote nursing skills and reduce caregivers' burdens.


Assuntos
Cuidadores , Neoplasias Colorretais , Humanos , Estudos Transversais , Pessoal de Saúde , Sobrecarga do Cuidador , Neoplasias Colorretais/terapia
2.
BMC Cancer ; 22(1): 491, 2022 May 03.
Artigo em Inglês | MEDLINE | ID: mdl-35505288

RESUMO

BACKGROUND: High medication literacy is the basis of rational medication application and is essential for the management of severe adverse drug reactions. The objective of the present study was to assess the level of medication literacy and determine the association between medication literacy and skin adverse drug reactions in non-small-cell lung cancer (NSCLC) patients undergoing targeted epidermal growth factor receptor tyrosine kinase inhibitor (EGFR-TKI) therapy. METHODS: This is a cross-sectional study conducted from May to September 2020. In total, 296 NSCLC patients undergoing targeted EGFR-TKI therapy were recruited from hospitals in Henan, China. Structured questionnaires were used to evaluate skin adverse drug reactions and medication literacy. Pearson correlation analysis and binary logistic regression analysis were carried out to identify the correlations between medication literacy and the severity of skin adverse drug reactions in the recruited patients. RESULTS: The research sample consisted of 296 patients with a response rate of 92.5%. The mean score of skin adverse drug reactions and the mean score of medication literacy were 1.83 ± 0.91 and 6.54 ± 2.78, respectively. In total, 188 patients (63.5%) were considered to have moderate medication literacy. According to the binary logistic regression analysis, the following factors were associated with severe skin adverse drug reactions: age (B = - 3.929, P = 0.000), sex (B = -4.062, P = 0.000), educational level (B = 2.712, P = 0.002), comorbidity (B = 3.297, P = 0.001), eczema history (B = 2.996, P = 0.001), nutritional status (B = -4.891, P = 0.000), blood interleukin-6 level (B = -2.143, P = 0.013), blood high-sensitivity C-reactive protein level (B = -4.015, P = 0.000), combination of drugs (B = -3.183, P = 0.048) and medication literacy (B = - 1.503, P = 0.000). Subgroup analysis showed that in addition to medication literacy, some other factors including education level, comorbidity, nutritional status, blood interleukin-6 level and combined drug application were common factors that contributed to various adverse skin drug reactions in NSCLC patients under targeted EGFR-TKI therapy. CONCLUSION: The low medication literacy of the investigated NSCLC patients undergoing targeted EGFR-TKI therapy was correlated with a high proportion of severe skin adverse drug reactions. In addition, factors other than medication literacy including education level, comorbidity, nutritional status, blood interleukin-6 level and the combinatorial application of drugs were also related to the severity of various adverse skin drug reactions. A comprehensive and targeted intervention may be beneficial to improve medication literacy and control severe skin adverse drug reactions in NSCLC patients.


Assuntos
Carcinoma Pulmonar de Células não Pequenas , Efeitos Colaterais e Reações Adversas Relacionados a Medicamentos , Neoplasias Pulmonares , Carcinoma Pulmonar de Células não Pequenas/complicações , Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Estudos Transversais , Efeitos Colaterais e Reações Adversas Relacionados a Medicamentos/complicações , Efeitos Colaterais e Reações Adversas Relacionados a Medicamentos/etiologia , Receptores ErbB , Humanos , Interleucina-6 , Alfabetização , Neoplasias Pulmonares/complicações , Inibidores de Proteínas Quinases/efeitos adversos
3.
Support Care Cancer ; 30(12): 9889-9899, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36400979

RESUMO

PURPOSE: The status and associated factors of the health-related quality of life of non-small-cell lung cancer (NSCLC) patients under targeted anti-cancer therapy have not been investigated. Self-management and coping style have been proven to be closely related to patients' health-related quality of life. Based on these observations, this study was designed to firstly assess the status of health-related quality of life, and then explore the relationships among coping styles, self-management, and health-related quality of life of NSCLC patients with skin adverse drug reactions under targeted therapy. METHODS: We performed a cross-sectional study including 536 NSCLC patients with skin adverse drug reactions under targeted therapy in cancer clinics of three hospitals in China between May 2020 and May 2021. Structured questionnaires, including the Functional Assessment of Cancer Therapy-Epidermal Growth Factor Receptor Inhibitor 18, Cancer Patient Self-management Evaluation Scale, and Medical Coping Modes Questionnaire, were used to collect data. Relationships among coping style, self-management, and health-related quality of life were identified by Pearson correlation analysis and a multiple linear regression algorithm. RESULTS: The total score of health-related quality of life was 46 ± 12.84 in 536 NSCLC patients with skin adverse drug reactions undergoing targeted therapy. Health-related quality of life was positively correlated with self-management (r = 0.785, P < 0.01) and facing (r = 0.807, P < 0.01) and negatively correlated with yield (r = - 0.718, P < 0.01), avoidance (r = - 0.711, P < 0.01), and the severity of skin adverse reactions (r = - 0.722, P = 0.000). Via multiple linear regression analysis, we identified some significant factors associated with health-related quality of life, including age, education level, combination of medicine, Charlson Comorbidity Index, stages of disease, facing, yield, symptom management, daily activity management, psychological and emotional management, self-efficacy, and self-management (P < 0.05). CONCLUSIONS: NSCLC patients with skin adverse drug reactions undergoing targeted therapy generally had a compromised health-related quality of life. The critical factors that were associated with the status of health-related quality of life were age, education level, comorbidity, the combinatorial application of drugs, stage of disease, self-management, and coping styles.


Assuntos
Carcinoma Pulmonar de Células não Pequenas , Efeitos Colaterais e Reações Adversas Relacionados a Medicamentos , Neoplasias Pulmonares , Autogestão , Humanos , Neoplasias Pulmonares/tratamento farmacológico , Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Qualidade de Vida , Estudos Transversais , Adaptação Psicológica , Receptores ErbB
4.
BMC Cancer ; 21(1): 206, 2021 Feb 28.
Artigo em Inglês | MEDLINE | ID: mdl-33639888

RESUMO

BACKGROUND: The adverse reactions (ADRs) of targeted therapy were closely associated with treatment response, clinical outcome, quality of life (QoL) of patients with cancer. However, few studies presented the correlation between ADRs of targeted therapy and treatment effects among cancer patients. This study was to explore the characteristics of ADRs with targeted therapy and the prognosis of cancer patients based on the clinical data. METHODS: A retrospective secondary data analysis was conducted within an ADR data set including 2703 patients with targeted therapy from three Henan medical centers of China between January 2018 and December 2019. The significance was evaluated with chi-square test between groups with or without ADRs. Univariate and multivariate logistic regression with backward stepwise method were applied to assess the difference of pathological characteristics in patients with cancer. Using the univariate Cox regression method, the actuarial probability of overall survival was performed to compare the clinical outcomes between these two groups. RESULTS: A total of 485 patients were enrolled in this study. Of all patients, 61.0% (n = 296) occurred ADRs including skin damage, fatigue, mucosal damage, hypertension and gastrointestinal discomfort as the top 5 complications during the target therapy. And 62.1% of ADRs were mild to moderate, more than half of the ADRs occurred within one month, 68.6% ADRs lasted more than one month. Older patients (P = 0.022) and patients with lower education level (P = 0.036), more than 2 comorbidities (P = 0.021), longer medication time (P = 0.022), drug combination (P = 0.033) and intravenous administration (P = 0.019) were more likely to have ADRs. Those with ADRs were more likely to stop taking (P = 0.000), change (P = 0.000), adjust (P = 0.000), or not take the medicine on time (P = 0.000). The number of patients with recurrence (P = 0.000) and metastasis (P = 0.006) were statistically significant difference between ADRs and non-ADRs group. And the patients were significantly poor prognosis in ADRs groups compared with non-ADRs group. CONCLUSION: The high incidence of ADRs would affect the treatment and prognosis of patients with cancer. We should pay more attention to these ADRs and develop effective management strategies.


Assuntos
Terapia de Alvo Molecular/efeitos adversos , Neoplasias/tratamento farmacológico , Adulto , Idoso , Idoso de 80 Anos ou mais , China/epidemiologia , Toxidermias/epidemiologia , Toxidermias/etiologia , Efeitos Colaterais e Reações Adversas Relacionados a Medicamentos/epidemiologia , Fadiga/induzido quimicamente , Fadiga/epidemiologia , Feminino , Gastroenteropatias/induzido quimicamente , Gastroenteropatias/epidemiologia , Registros Hospitalares , Humanos , Hipertensão/induzido quimicamente , Hipertensão/epidemiologia , Incidência , Estimativa de Kaplan-Meier , Masculino , Pessoa de Meia-Idade , Mucosite/induzido quimicamente , Mucosite/epidemiologia , Metástase Neoplásica , Recidiva Local de Neoplasia/epidemiologia , Neoplasias/mortalidade , Prognóstico , Modelos de Riscos Proporcionais , Qualidade de Vida , Estudos Retrospectivos , Fatores Socioeconômicos , Resultado do Tratamento , Adulto Jovem
5.
Anal Chem ; 92(21): 14452-14458, 2020 11 03.
Artigo em Inglês | MEDLINE | ID: mdl-33085464

RESUMO

The SWI/SNF complex is a highly conserved chromatin remodeling complex and can hydrolyze ATP by its catalytic subunit BRG1 or BRM to reconstruct the chromatin. To investigate whether this ATP-dependent chromatin remodeling could affect the DNA conformation, we therefore regulated (knocked down or overexpressed) BRG1/BRM in the cells and applied Fourier transform infrared (FTIR) spectroscopy to probe DNA conformational changes. As a result, we found that BRG1/BRM was indeed associated with the DNA conformational changes, in which knockdown of BRG1/BRM reduced Z-DNA conformation, while overexpression of BRG1/BRM enhanced Z-DNA conformation. This Z-DNA conformational transformation was also verified using the Z-DNA-binding proteins. Therefore, this work has provided a direct analytical tool to probe Z-DNA transformation upon ATP-dependent chromatin remodeling.


Assuntos
Montagem e Desmontagem da Cromatina , DNA Forma Z/química , Conformação de Ácido Nucleico , Espectroscopia de Infravermelho com Transformada de Fourier , Trifosfato de Adenosina/metabolismo , Linhagem Celular Tumoral , DNA Helicases/deficiência , DNA Helicases/genética , DNA Forma Z/metabolismo , Técnicas de Silenciamento de Genes , Humanos , Proteínas Nucleares/deficiência , Proteínas Nucleares/genética , Fatores de Transcrição/deficiência , Fatores de Transcrição/genética
6.
Eur J Oncol Nurs ; 68: 102518, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38309254

RESUMO

PURPOSE: This study aimed to investigate the influence factors of financial toxicity experienced by colorectal cancer patients after surgery. The results will provide deep insights for developing effective intervention strategies to address this common issue of colorectal cancer care. METHODS: In this cross-sectional study, we recruited 213 postoperative patients with colorectal cancer from February 2023 to July 2023 in two major public hospitals. Patients completed the General Information Questionnaire, Comprehensive Scores for Financial Toxicity (COST), Self-perceived Burden Scale (SPBS), Family Resilience Questionnaire (FaREQ), and Social Support Rating Scale (SSRS). A multiple linear regression model was used to investigate the influence factors of financial toxicity. RESULTS: The mean score of financial toxicity was medium (18.91 ± 7.90) in this study. Financial toxicity score was negatively correlated with self-perceived burden (r = -0.333, P < 0.01) and positively associated with family resilience (r = 0.365, P < 0.01) and social support (r = 0.388, P < 0.01). Via multiple linear regression analysis, we identified seven significant factors associated with financial toxicity, including family income [(95 %CI: 1.075-3.123); P = 0.000], self-perceived burden [(95 %CI: 0.300∼-0.038); P = 0.012], stoma [(95 %CI: 5.309∼-1.682); P = 0.000], social support [(95 %CI:0.058-0.407); P = 0.009], cancer stage [(95 %CI: 2.178∼-0.170); P = 0.022], postoperative duration [(95 %CI: 1.900∼-0.332); P = 0.005], and family resilience [(95 %CI: 0.028-0.203); P = 0.010]. CONCLUSIONS: Financial toxicity was prevalent among postoperative colorectal cancer patients. Additional support and early interventions should be given to high-risk patients, including those with stomas, advanced disease stages, or experiencing longer postoperative duration. Apart from demographic factors, we identified that self-perceived burden, family resilience, and social support were also associated with financial toxicity, providing a new perspective for developing effective strategies against financial toxicity.


Assuntos
Neoplasias Colorretais , Resiliência Psicológica , Humanos , Efeitos Psicossociais da Doença , Estudos Transversais , Saúde da Família , Estresse Financeiro , Inquéritos e Questionários , Neoplasias Colorretais/cirurgia
7.
Eur J Oncol Nurs ; 69: 102519, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38402718

RESUMO

PURPOSE: To assess the level of financial toxicity of informal caregivers of colorectal cancer patients and explore the related key influencing factors. METHOD: A descriptive survey design was used in this study. Data were collected from 236 informal caregivers of colorectal cancer patients between March 2023 and July 2023 from a major hospital in central China (Henan province). Potential influence factors of financial toxicity, including basic information, perceived stress, and social support were analyzed using multivariate linear regression. RESULTS: The financial toxicity score of 236 caregivers of colorectal cancer patients was 19.42 ± 9.72. One hundred and fourteen caregivers (accounting for 48.31%) of colorectal cancer patients had high levels of financial toxicity. Financial toxicity scores of caregivers were negatively correlated with perceived stress (r = -0.421, P < 0.001) and positively correlated with social support (r = 0.416, P < 0.001). Our multivariate regression analysis identified some factors that directly affected caregivers' financial toxicity, including caregiver age (t = 2.105, P = 0.036), medical insurance (t = 2.462, P = 0.015), average household income (t = 2.995, P = 0.003), place of residence (t = 2.872, P = 0.004), perceived stress (t = -4.945, P < 0.001), and social support (t = 4.513, P < 0.001). CONCLUSIONS: Caregivers of colorectal cancer patients generally experience a higher level of financial toxicity, which could be eased by lower perceived stress and higher social support. In clinical practice, it is necessary to comprehensively assess the level of financial toxicity of particular caregivers and enact targeted interventions such as increasing communication and actively providing information to address the high medical costs, reducing the detrimental effects of financial toxicity, and improving the quality of colorectal cancer care.


Assuntos
Cuidadores , Neoplasias Colorretais , Humanos , Estudos Transversais , Estresse Financeiro , Apoio Social
8.
BMJ Open ; 12(11): e063921, 2022 11 28.
Artigo em Inglês | MEDLINE | ID: mdl-36442902

RESUMO

INTRODUCTION: Here, we provide a feasible, well-designed protocol of a randomised controlled trial for the assessment of the effects of a home-based multidisciplinary intervention on the severity of skin adverse drug reactions and health-related indicators in patients with non-small cell lung cancer (NSCLC) under epidermal growth factor receptor tyrosine kinase inhibitor (EGFR-TKI) therapy. METHODS AND ANALYSIS: The study will be a two-group, parallel randomised controlled trial conducted at patients' homes by a multidisciplinary team in Zhengzhou in Henan Province, China. Patients with NSCLC who received EGFR-TKI therapy and experienced adverse skin reactions will be randomised and receive either ordinary care or home-based multidisciplinary interventions. The intervention will be divided into an intensive stage (6 weeks) and a maintenance stage (6 weeks) with baseline and follow-up assessment. Interventions in the intensive stage will include general interventions such as health education, follow-up, behaviour guide and social support and targeted interventions such as skill training, coping with adverse drug reaction and problem-solving. The measures that will be carried out in maintenance stage are continuous interventions consisted of an intensive intervention. The multidisciplinary team will be responsible for managing skin adverse drug reactions as required at patients' homes. Data collection and analysis will be performed by researchers at baseline, the end of the sixth week of intervention and the third month after the intervention. The primary outcome is the degree of skin adverse drug reactions, while the secondary outcomes, for example, self-management ability, quality of life, outpatient visits and health economics indicators, will also be presented. ETHICS AND DISSEMINATION: This study was reviewed and approved by the Ethics Committee of Zhengzhou University (No. ZZUIRB-2020-97). Findings will be available to patients, clinicians, nurses, pharmacists, community medical staff, funders and health policymakers through peer-reviewed publications, social media and patient support groups. TRIAL REGISTRATION NUMBER: Chinese Clinical Trials Registry (ChiCTR2000040643).


Assuntos
Carcinoma Pulmonar de Células não Pequenas , Efeitos Colaterais e Reações Adversas Relacionados a Medicamentos , Neoplasias Pulmonares , Humanos , Neoplasias Pulmonares/tratamento farmacológico , Qualidade de Vida , Inibidores de Proteínas Quinases/efeitos adversos , Receptores ErbB , Ensaios Clínicos Controlados Aleatórios como Assunto
9.
Patient Prefer Adherence ; 16: 995-1004, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35431541

RESUMO

Objective: Oral targeted antineoplastic drugs (OTADs) are becoming more and more acceptable for lung cancer treatment due to their advantages such as the convenience of administration and milder side effects. However, medication adherence represents a major issue for prolonged OTAD treatment. In this study, the factors associated with treatment adherence to OTAD were explored through the Adherence Influencing Factor Framework suggested by WHO. Based on these results, we further examined the potential factors related to social psychological cognition in OTAD adherence in patients with lung cancer. Methods: This qualitative study was conducted in public hospitals in Henan, China. Data were collected through semi-structured interviews with selected lung cancer patients. Face-to-face interviews were audio-recorded and transcribed for thematic analysis. Results: Of the 21 patients interviewed, 17 were males and 4 were females. The analysis of the data led to four themes, ie, patient-related factors (medication-taking introspection, family structure, weigh the pros and cons of OTAD treatment), medication-related factors (medication experience, adverse reactions, information access), physician/nurse-related factors (shared decision making, doctor's reaction, nurse's inquiry) and society-related factors (fear, stigma). Conclusion: Family structure, weigh the pros and cons of OTAD treatment, information access, shared decision making, nurse's inquiry are potential factors affecting OTAD adherence in lung cancer patients. Providing drug information support to patients, inviting patients to join in shared decision-making and strengthening doctor-patient-nurse cooperation are important for improving medication adherence. Further research should be conducted to help healthcare providers to promote the medication adherence of lung cancer patients to OTAD treatment.

10.
Asia Pac J Oncol Nurs ; 9(10): 100115, 2022 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-36118625

RESUMO

Objective: To explore the experience of non-small-cell lung cancer patients with targeted therapy-related skin adverse drug reactions. Methods: This is a descriptive quantitative study conducted in a comprehensive hospital in Henan, China. Purposive sampling was used to recruit patients with non-small-cell lung cancer and with targeted therapy-related skin adverse drug reactions. In total, 23 patients were approached when the data were saturated. Face-to-face interviews were conducted by an independent researcher using a semi-structured interview guide. Interview data were transcribed and analyzed by qualitative inductive content analysis. Results: Based on the analysis, four main categories were identified according to patients' descriptions of their experience: a lack of self-management ability, psychological and emotional problems, a barrier to social participation, and a need for social support. Suffering from persistent symptoms, insufficient knowledge, skills and strategies for skin adverse drug reaction management, psychological problems, social avoidance/withdrawal, and reduced willingness to work were core experiences that would affect patients' compliance with treatment, prognosis, and the overall quality of life. Conclusions: This study revealed the real experience of patients with non-small-cell lung cancer and with targeted therapy-related skin adverse drug reactions which contributed to the development of targeted interventions to manage skin adverse reactions.

11.
Asian Nurs Res (Korean Soc Nurs Sci) ; 15(3): 203-209, 2021 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-34033973

RESUMO

PURPOSE: This study was to investigate the work experience of newly recruited male nurses during the COVID-19 pandemic. METHODS: With a phenomenological approach, this qualitative study was adopted semistructured interviews by phone or video calls. A total of 9 male nurses newly recruited for the COVID-19 wards in Chinese hospitals were interviewed for this study. And Colaizzi's method was applied for evaluation in the data analysis. RESULTS: Based on our findings, three themes were extracted. First, the newly recruited male nurses showed negative emotions at the beginning of COVID-19 epidemic, which was caused by changes in working conditions and content, but also prompted the nurses to change the way of coping with the crisis. Second, they gradually mastered the working skills and psychological training to cope with COVID-19 and developed a positive attitude toward life and a high sense of professional responsibility. Finally, we learned about their needs to respond to public health emergencies such as the COVID-19 pandemic. CONCLUSION: COVID-19 is a disaster for all of humanity. The newly recruited male nurses are an important force in emergency rescue. Although they suffered from short-term negative emotions, they quickly adapted to the crisis. In order to better prepare for future emergencies, the disaster response capacity of newly recruited male nurses needs to be further improved. In addition, newly recruited male nurses have a strong demand for timely and personalized career development guidance.


Assuntos
Atitude do Pessoal de Saúde , COVID-19/psicologia , Enfermeiros/psicologia , Recursos Humanos de Enfermagem Hospitalar/psicologia , Adaptação Psicológica , Ansiedade/psicologia , COVID-19/enfermagem , Empatia , Medo/psicologia , Humanos , Masculino , Pesquisa Qualitativa
12.
Front Genet ; 12: 717621, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34707639

RESUMO

Plasma total homocysteine (tHCY) is a known risk factor of a wide range of complex diseases. No genome scans for tHCY have been conducted in East Asian populations. Here, we conducted an exome-wide association study (ExWAS) for tHCY in 5,175 individuals of Chinese Han origin, followed by a replication study in 668 Chinese individuals. The ExWAS identified two loci, 1p36.22 (lead single-nucleotide polymorphism (SNP) rs1801133, MTHFR C677T) and 16q24.3 (rs1126464, DPEP1), showing exome-wide significant association with tHCY (p < 5E-7); and both loci have been previously associated with tHCY in non-East Asian populations. Both SNPs were replicated in the replication study (p < 0.05). Conditioning on the genotype of C677T and rs1126464, we identified a novel East Asian-specific missense variant rs138189536 (C136T) of MTHFR (p = 6.53E-10), which was also significant in the replication study (p = 9.8E-3). The C136T and C677T variants affect tHCY in a compound heterozygote manner, where compound heterozygote and homozygote genotype carriers had on average 43.4% increased tHCY than had other genotypes. The frequency of the homozygote C677T genotype showed an inverse-U-shaped geospatial pattern globally with a pronounced frequency in northern China, which coincided with the high prevalence of hyperhomocysteinemia (HHCY) in northern China. A logistic regression model of HHCY status considering sex, age, and the genotypes of the three identified variants reached an area under the receiver operating characteristic curve (AUC) value of 0.74 in an independent validation cohort. These genetic observations provide new insights into the presence of multiple causal mutations at the MTHFR locus, highlight the role of genetics in HHCY epidemiology among different populations, and provide candidate loci for future functional studies.

13.
Biotechniques ; 68(4): 191-199, 2020 04.
Artigo em Inglês | MEDLINE | ID: mdl-32066262

RESUMO

Nucleic acid precipitation is important for virtually all molecular biology investigations. However, despite its crucial role, a systematic study of the influence factors of nucleic acid precipitation has not been reported. In the present work, via rational experimental design, key factors of nucleic acid precipitation, including the type of nucleic acid, temperature and time of incubation, speed and time of centrifugation, volume ratio of ethanol/isopropanol to nucleic acid solution, type of cation-containing salt solution and type of coprecipitator, were comprehensively evaluated in an attempt to maximize the efficiency of nucleic acid precipitation. Our results indicate that the optimal conditions of each influence factor of nucleic acid precipitation may vary in accordance with the chemistry, structure and length of nucleic acids.


Assuntos
Precipitação Química , Ácidos Nucleicos/química , Ácidos Nucleicos/isolamento & purificação , 2-Propanol/química , Resinas Acrílicas/química , Cátions/química , Etanol/química , Biologia Molecular , Temperatura
14.
Mar Biotechnol (NY) ; 16(4): 475-83, 2014 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-24535704

RESUMO

To study the Ca(2+)/Calmodulin (CaM) signal transduction pathway of Gracilaria lemaneiformis under heat stress, myo-inositol-1-phosphate synthase (MIPS), a calmodulin-binding protein, was isolated using the yeast two-hybrid system. cDNA and DNA sequences of mips were cloned from G. lemaneiformis by using 5'RACE and genome walking procedures. The MIPS DNA sequence was 2,067 nucleotides long, containing an open reading frame (ORF) of 1,623 nucleotides with no intron. The mips ORF was predicted to encode 540 amino acids, which included the conserved MIPS domain and was 61-67 % similar to that of other species. After analyzing the amino acid sequence of MIPS, the CaM-Binding Domain (CaMBD) was inferred to be at a site spanning from amino acid 212 to amino acid 236. The yeast two-hybrid results proved that MIPS can interact with CaM and that MIPS is a type of calmodulin-binding protein. Next, the expression of CaM and MIPS in wild-type G. lemaneiformis and a heat-tolerant G. lemaneiformis cultivar, "981," were analyzed using real-time PCR under a heat shock of 32 °C. The expression level displayed a cyclical upward trend. Compared with wild type, the CaM expression levels of cultivar 981 were higher, which might directly relate to its resistance to high temperatures. This paper indicates that MIPS and CaM may play important roles in the high-temperature resistance of G. lemaneiformis.


Assuntos
Proteínas de Ligação a Calmodulina/metabolismo , Gracilaria/fisiologia , Resposta ao Choque Térmico/fisiologia , Mio-Inositol-1-Fosfato Sintase/química , Mio-Inositol-1-Fosfato Sintase/metabolismo , Proteínas de Plantas/química , Proteínas de Plantas/metabolismo , Sequência de Aminoácidos , Proteínas de Ligação a Calmodulina/química , Dados de Sequência Molecular
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