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1.
Ying Yong Sheng Tai Xue Bao ; 35(2): 447-456, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-38523103

RESUMEN

We conducted a field experiment in the dry farming area in south Ningxia from 2018 to 2021, to explore the influence of tillage methods combined with mulching on soil bulk density, aggregate content, soil water storage and potato yield under different precipitation years. There were four tillage methods (15 cm depth ploughing, and 30 cm, 40 cm and 50 cm depth subsoiling) and three mulching measures (mulching with oat straw, plastic film and no mulching), with the ploughing depth of 15 cm without mulching as control. The results showed the combination of tillage and mulching effectively reduced soil bulk density in 0-60 cm layer after three years of farming compared with that prior to the experiment. Under the same tillage mode, the best effect was achieved in mulching with oat straw under different precipitation years. To be specific, the best effect in 20 cm and 40 cm soil layers was achieved in mulching with oat straw for 30 cm depth subsoiling, in 60 cm soil layer for 15 cm ploughing in wet year, and for 40 cm depth subsoiling in 20 cm, 40 cm and 60 cm soil layers in normal and dry years. In 0-20 cm soil layer, the content of >0.25 mm soil aggregate was the highest for 40 cm depth subsoiling with oat straw mul-ching in all the three years. In 20-40 cm soil layer, the content was the highest for 15 cm depth ploughing with oat straw mulching in wet year, and for 40 cm depth subsoiling with oat straw mulching in normal and dry years. In 40-60 cm soil layer, content was the highest for 15 cm depth ploughing with plastic film mulching, 30 cm depth subsoiling with plastic film mulching, and 30 cm depth subsoiling with oat straw mulching in wet, normal and dry years, which was increased by 18.8%, 27.0%, and 35.8%, respectively, compared with the control. In the key growth stage (from squaring to tuber expansion) of potatoes, soil water storage in 0-100 cm layer was optimal for 30 cm depth subsoiling with oat straw mulching in wet year and for 40 cm depth subsoiling with oat straw mulching in normal and dry years, with an increase of 19.4%, 19.5%, and 23.7%, respectively. Potato yield was the highest for 30 cm depth subsoiling with oat straw mulching in wet year and for 40 cm depth subsoiling in normal and dry years, with an increase of 84.6%, 81.7%, and 106.3%, respectively. The correlation analysis showed that improved soil physical properties played a significant role in increasing potato yield, with the most significant role of soil bulk density and soil water storage at the squaring stage. Potato yield was high at a tillage depth of 34.67-36.03 cm. We concluded that the combination of tillage method and mulching could effectively improve soil physical pro-perties and increase soil water storage in the growth stage of potatoes, thereby significantly increa-sing potato yield. Potato yield in dry farming area could be enhanced through 30 cm depth subsoiling with oat straw mulching in wet years, and 40 cm depth subsoiling with oat straw mulching in normal and dry years.


Asunto(s)
Suelo , Solanum tuberosum , Agricultura/métodos , Granjas , Agua , China , Zea mays
2.
Nature ; 626(7999): 523-528, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-38356068

RESUMEN

Spatial, momentum and energy separation of electronic spins in condensed-matter systems guides the development of new devices in which spin-polarized current is generated and manipulated1-3. Recent attention on a set of previously overlooked symmetry operations in magnetic materials4 leads to the emergence of a new type of spin splitting, enabling giant and momentum-dependent spin polarization of energy bands on selected antiferromagnets5-10. Despite the ever-growing theoretical predictions, the direct spectroscopic proof of such spin splitting is still lacking. Here we provide solid spectroscopic and computational evidence for the existence of such materials. In the noncoplanar antiferromagnet manganese ditelluride (MnTe2), the in-plane components of spin are found to be antisymmetric about the high-symmetry planes of the Brillouin zone, comprising a plaid-like spin texture in the antiferromagnetic (AFM) ground state. Such an unconventional spin pattern, further found to diminish at the high-temperature paramagnetic state, originates from the intrinsic AFM order instead of spin-orbit coupling (SOC). Our finding demonstrates a new type of quadratic spin texture induced by time-reversal breaking, placing AFM spintronics on a firm basis and paving the way for studying exotic quantum phenomena in related materials.

3.
Front Cell Infect Microbiol ; 13: 1228940, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-38053532

RESUMEN

Background: There are several clinical and molecular predictors of responses to antidepressant therapy. However, these markers are either too subjective or complex for clinical use. The gut microbiota could provide an easily accessible set of biomarkers to predict therapeutic efficacy, but its value in predicting therapy responses to acupuncture in patients with depression is unknown. Here we analyzed the predictive value of the gut microbiota in patients with postpartum depressive disorder (PPD) treated with acupuncture. Methods: Seventy-nine PPD patients were enrolled: 55 were treated with acupuncture and 24 did not received any treatment. The 17-item Hamilton depression rating scale (HAMD-17) was used to assess patients at baseline and after eight weeks. Patients receiving acupuncture treatment were divided into an acupuncture-responsive group or non-responsive group according to HAMD-17 scores changes. Baseline fecal samples were obtained from the patients receiving acupuncture and were analyzed by high-throughput 16S ribosomal RNA sequencing to characterize the gut microbiome. Results: 47.27% patients responded to acupuncture treatment and 12.5% patients with no treatment recovered after 8-week follow-up. There was no significant difference in α-diversity between responders and non-responders. The ß-diversity of non-responders was significantly higher than responders. Paraprevotella and Desulfovibrio spp. were significantly enriched in acupuncture responders, and these organisms had an area under the curve of 0.76 and 0.66 for predicting responder patients, respectively. Conclusions: Paraprevotella and Desulfovibrioare may be useful predictive biomarkers to predict PPD patients likely to respond to acupuncture. Larger studies and validation in independent cohorts are now needed to validate our findings.


Asunto(s)
Terapia por Acupuntura , Trastorno Depresivo , Microbiota , Femenino , Humanos , Resultado del Tratamiento , Trastorno Depresivo/terapia , Biomarcadores , Periodo Posparto
4.
J Inflamm Res ; 16: 5189-5203, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-38026248

RESUMEN

Background: Increasing evidences demonstrate that immune dysregulation can result in depression, and it is reported that persistent inflammatory response is related to the unresponsiveness of antidepressant treatment. Purpose: This study aimed to explore the reason why some responded but some not responded to acupuncture in treating postpartum depression (PPD), and whether it related to the levels of inflammatory cytokines. Patients and Methods: Women diagnosed with PPD were recruited in to accept 8-week acupuncture. All subjects were assessed the 17-item Hamilton Depression Rating Scale (HDRS17) at baseline, week 1, week 2, week 4 and week 8 during the treatment. A panel of 9 cytokines was measured at baseline and 8 weeks. Results: Of the 121 participants, 96 completed the 8-week assessment and 46 completed the blood sample collection. HDRS17 scores of 96 subjects showed significant statistical reduction since the first week (P = 0.002) and reached to 5.31 (P < 0.000) at the end of therapy. And we divided the 46 subjects into responders and non-responders according to the response rate of HDRS17 scores. Responders and non-responders did not differ significantly between-group in changes in the 9 cytokines. In responders, IL-6, IL-10 and IFN-γ levels were statistically lower (P = 0.006; P = 0.033; P = 0.024), while TGF-ß1 was statistically higher after 8 weeks treatment (P < 0.000). In non-responders, the levels of IL-5, TNF-α and TGF-ß1 were statistically higher (P = 0.018; P < 0.000; P < 0.000), while IFN-γ was statistically lower (P = 0.005). Conclusion: Acupuncture could alleviate depressive symptoms of patients with PPD and might through adjusting peripheral inflammatory response by up-regulating anti-inflammatory cytokines and down-regulating pro-inflammatory cytokines.

5.
ACS Nano ; 17(21): 21394-21410, 2023 11 14.
Artículo en Inglés | MEDLINE | ID: mdl-37870500

RESUMEN

Immunotherapy is an effective adjunct to surgery for preventing tumor recurrence and metastasis in postoperative tumor patients. Although mimicking microbial invasion and immune activation pathways can effectively stimulate the immune system, the limited capacity of microbial components to bind antigens and adjuvants restricts the development of this system. Here, we construct bionic yeast carriers (BYCs) by in situ polymerization of mesoporous silica nanoparticles (MSNs) within the yeast capsules (YCs). BYCs can mimic the yeast infection pathway while utilizing the loading capacity of MSNs for multiple substances. Pore size and hydrophobicity-modified BYC can be loaded with both antigen and adjuvant R848. Oral or subcutaneous injection uptake of coloaded BYCs demonstrated positive therapeutic effects as a tumor therapeutic vaccine in both the transplantation tumor model and the metastasis tumor model. 57% of initial 400 mm3 tumor recurrence models are completely cured with coloaded BYCs via combination therapy with surgery, utilizing surgically resected tumors as antigens. The BYCs construction and coloading strategy will provide insights and optimistic approaches for the development of effective and controllable cancer vaccine carriers.


Asunto(s)
Vacunas contra el Cáncer , Nanopartículas , Humanos , Saccharomyces cerevisiae , Biónica , Recurrencia Local de Neoplasia/prevención & control , Adyuvantes Inmunológicos , Antígenos , Dióxido de Silicio , Porosidad , Portadores de Fármacos
6.
Front Hum Neurosci ; 17: 1163746, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37266323

RESUMEN

Objective: This study aimed to analyze the changes in structure and function in amygdala sub-regions in patients with postpartum depression (PPD) before and after acupuncture. Methods: A total of 52 patients with PPD (All-PPD group) were included in this trial, 22 of which completed 8 weeks of acupuncture treatment (Acu-PPD group). An age-matched control group of 24 healthy postpartum women (HPW) from the hospital and community were also included. Results from the 17-Hamilton Depression Scale (17-HAMD) and the Edinburgh Postnatal Depression Scale (EPDS) were evaluated, and resting-state functional magnetic resonance imaging (rs-fMRI) scans were performed at baseline and after the acupuncture treatment. Sub-regions of the amygdala were used as seed regions to measure gray matter volume (GMV) and analyzed for resting-state functional connectivity (RSFC) values separately. Finally, correlation analyses were performed on all patients with PPD to evaluate association values between the clinical scale scores, GMV, and RSFC values, while controlling for age and education. Pearson's correlation analyses were conducted to investigate the relevance between GMV and RSFC values of brain regions that differed before and after acupuncture treatment and clinical scale scores in Acu-PPD patients. Results: The HAMD scores for Acu-PPD were reduced after acupuncture treatment (P < 0.05), suggesting the positive effects of acupuncture on depression symptoms. Structurally, the All-PPD group showed significantly decreased GMV in the left lateral part of the amygdala (lAMG.L) and the right lateral part of the amygdala (lAMG.R) compared to the HPW group (P < 0.05). In addition, the GMV of lAMG.R was marginally increased in the Acu-PPD group after acupuncture (P < 0.05). Functionally, the Acu-PPD group showed a significantly enhanced RSFC between the left medial part of the amygdala (mAMG.L) and the left vermis_6, an increased RSFC between the right medial part of the amygdala (mAMG.R) and left vermis_6, and an increased RSFC between the lAMG.R and left cerebelum_crus1 (P < 0.05). Moreover, correlation studies revealed that the GMV in the lAMG.R was significantly related to the EPDS scores in the All-PPD group (P < 0.05). Conclusion: Our findings demonstrated that the structure of amygdala sub-regions is impaired in patients with PPD. Acupuncture may improve depressive symptoms in patients with PPD, and the mechanism may be attributed to changes in the amygdala sub-region structure and the functional connections of brain areas linked to the processing of negative emotions. The fMRI-based technique can provide comprehensive neuroimaging evidence to visualize the central mechanism of action of acupuncture in PPD.

7.
Zhongguo Zhen Jiu ; 41(8): 877-82, 2021 Aug 12.
Artículo en Chino | MEDLINE | ID: mdl-34369698

RESUMEN

OBJECTIVE: To observe the clinical therapeutic effect on mild and moderate postpartum depression treated with acupuncture of Tiaoren Tongdu (regulating the conception vessel and unblocking the governor vessel) on the base of real world. METHODS: A total of 116 patients with mild and moderate postpartum depression were divided into an acupuncture group (103 cases) and a non-acupuncture group (13 cases) according to treatment regimen provided. In the acupuncture group, acupuncture of Tiaoren Tongdu was applied to Baihui (GV 20), Yintang (GV 29), Zhongwan (CV 12), Qihai (CV 6), Guanyuan (CV 4), Neiguan (PC 6), Shenmen (HT 7), Hegu (LI 4), Zusanli (ST 36), Sanyinjiao (SP 6) and Taichong (LR 3). Needles were retained for 30 min each time, the treatment was given once every other day, 3 times a week. In the non-acupuncture group, psychotherapy was provided, once daily. The duration of treatment in the two groups was 8 weeks. According to the treatment times of acupuncture, the acupuncture group was subdivided into an acupuncture A group (60 cases with total treatments ≥ 6 times) and an acupuncture B group (43 cases with total treatments<6 times). Using propensity score matching method, the patients of the acupuncture A and B groups were matched each other. Finally, 31 pairs of cases were matched successfully. Before treatment, at 1st, 2nd, 4th and 8th weeks of treatment, as well as at 3-month follow-up, the scores of Hamilton depression scale (HAMD) were compared in patients among the three groups. Using Logistic regression, the impact of acupuncture frequencies on the therapeutic effect was analyzed and the clinical therapeutic effect was assessed. RESULTS: The total effective rate of the acupuncture A group was 100.0% (31/31), better than 76.9% (10/13) in the non-acupuncture group and 58.1% in the acupuncture B group (18/31) (P<0.05). HAMD score at each time point after treatment was lower than that before treatment in the patients of each group (P<0.05). But HAMD score at each time point after treatment in either the acupuncture A group or the acupuncture B group was lower than that in the non-acupuncture group separately (P<0.05), HAMD scores in the acupuncture A group at the 4th and 8th weeks of treatment and at follow-up were lower than those in the acupuncture B group (P<0.05). Logistic regression analysis showed that the total times of acupuncture treatment and the persistent days of treatment had a certain relation to therapeutic effect (P<0.05). CONCLUSION: Acupuncture of Tiaoren Tongdu effectively improves in mild and moderate postpartum depression and its therapeutic effect is closely related to treatment course.


Asunto(s)
Terapia por Acupuntura , Depresión Posparto , Puntos de Acupuntura , Depresión/terapia , Depresión Posparto/terapia , Femenino , Humanos , Agujas , Resultado del Tratamiento
8.
Mater Sci Eng C Mater Biol Appl ; 117: 111371, 2020 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-32919699

RESUMEN

Photothermal therapy (PTT) can take advantage of the photothermal effects of photothermal agents to acquire the energy from laser irradiation and convert it into heat. This can intensively elevate the temperature of the surrounding environment to directly destroy the cancer cells. It is expected that PAs with strong absorption in near infrared (NIR) range might possess the ideal tissue-transparent feature and minimal damage to surrounding healthy tissues, beneficial to the practical application. Herein, well-dispersed L-cysteine modified MoS2 (MoS2-Cys) nanospheres with the average diameter of about 422 nm and strong NIR adsorption were successfully synthesized through a facile method. The as-prepared MoS2-Cys nanospheres are composed of nanosheets with the average thickness of about 13.7 nm. The photothermal conversion efficiency of the as-prepared MoS2-Cys nanospheres with the very low concentration of 50 µg/mL was determined to be 35% when exposed to 808 NIR laser at the power density of 0.8 W/cm2, much higher than those of the previous reports with same dose and power density. MoS2-Cys nanospheres possessed the good photothermal ablation effect to significantly inhibit the growth of tumor in vivo. Furthermore, MoS2-Cys nanospheres did not exhibit detectable side effects, suggesting their good in vitro and in vivo biocompatibility.


Asunto(s)
Hipertermia Inducida , Nanosferas , Neoplasias , Línea Celular Tumoral , Cisteína , Humanos , Molibdeno , Neoplasias/terapia , Fototerapia , Terapia Fototérmica
9.
J Leukoc Biol ; 108(2): 547-557, 2020 08.
Artículo en Inglés | MEDLINE | ID: mdl-32248572

RESUMEN

Traditional Chinese medicine assigns individuals into different categories called "constitutions" to help guide the clinical treatment according to subjective physiologic, psychologic analyses, large-scale clinical observations, and epidemiologic studies. To further explore more objective expressions of constitutions, antibody microarrays were used to analyze the serologic protein profiles of two different constitutions, a balanced (or healthy) constitution (BC) and the dampness constitution (DC) comprising phlegm-dampness and damp-heat constitutions. The profiles of changing constitutions across time were also analyzed. Nineteen differentially expressed proteins between the two groups were identified, with known biologic functions involved in immunity and inflammation. This proteomic study may provide a biologic explanation why the BC is different than the dampness constitution.


Asunto(s)
Proteínas Sanguíneas , Medicina Tradicional China , Proteoma , Proteómica , Biomarcadores , Biología Computacional/métodos , Femenino , Humanos , Masculino , Medicina Tradicional China/métodos , Proteómica/métodos , Curva ROC
10.
J Laparoendosc Adv Surg Tech A ; 29(12): 1571-1576, 2019 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-31682205

RESUMEN

Objectives: To investigate the effect of autologous blood transfusion (ABT) and Pringle maneuver (PM) on postoperative early liver function and short-term postoperative results following laparoscopic liver resection in patients with benign hepatic neoplasms. Materials and Methods: We retrospectively analyzed the clinical data for 125 consecutive patients who underwent laparoscopic segmental hepatectomy from January 2015 to May 2018 (68 in the ABT group versus 57 in the PM group). We compared patients' characteristics and intra- and postoperative short-term outcomes between the groups. Results: The 2 groups were well matched regarding patients' clinical characteristics, types of liver resection, operative time, and histopathological findings (P > .05). Median blood loss was significantly lower in the PM group versus the ABT group (200 mL versus 750 mL, respectively; P < .01), and overall complication rates were similar (n = 12 [17%] versus n = 9 [16%], respectively; P > .05). The ABT group had significantly lower mean levels of total bilirubin, indirect bilirubin, aspartate transaminase, and alanine aminotransferase on postoperative days 1 and 3 (P < .05). The ABT group had a shorter hospital stay compared with the PM group (5.8 days versus 7.7 days, respectively; P < .05) and lower hospitalization costs (55,400 ± 15,400 versus 667,000 ± 21,600 CN dollars, respectively; P < .05). Conclusions: Compared with Pringle's maneuver, laparoscopic hepatectomy with ABT promoted early recovery of liver function and reduced hospitalization costs in select patients with benign hepatic neoplasms.


Asunto(s)
Transfusión de Sangre Autóloga , Hepatectomía/métodos , Laparoscopía/métodos , Neoplasias Hepáticas/cirugía , Adulto , Anciano , Alanina Transaminasa/sangre , Aspartato Aminotransferasas/sangre , Bilirrubina/sangre , Pérdida de Sangre Quirúrgica/estadística & datos numéricos , Femenino , Humanos , Tiempo de Internación/estadística & datos numéricos , Masculino , Persona de Mediana Edad , Tempo Operativo , Periodo Posoperatorio , Estudios Retrospectivos
11.
Food Funct ; 10(8): 4888-4896, 2019 Aug 01.
Artículo en Inglés | MEDLINE | ID: mdl-31339120

RESUMEN

This study aimed to investigate the effects of ferrous-ion-chelating peptides from Alaska pollock frames (APFP-Fe) on iron deficiency in anaemic rats. We hydrolysed the Alaska pollock frames to obtain a peptide with an average molecular weight of 822 Da. The bioavailability of APFP-Fe was tested using animal experiments. Wistar rats were randomly divided into six groups: an iron deficiency control group, a normal control group, and iron deficiency groups treated with ferrous sulfate (FeSO4) or low-, medium-, or high-dose APFP-Fe. Rats in the iron deficiency groups were fed an iron-deficient diet to establish the iron deficiency anaemia (IDA) model. After the model was established, different iron supplements were given to rats once per day via intragastric administration for 21 days. The results showed that APFP-Fe had restorative effects, returning the body weight, weight gain, height, and haematological parameters in IDA rats to normal levels. In addition, compared with FeSO4, APFP-Fe promoted significant weight gain and effectively improved haemoglobin, serum iron and transferrin levels, and recovery of the capacity of iron binding with transferrin, especially at the medium and high doses. These findings suggest that APFP-Fe is an effective source of iron for improving the iron nutritional status in IDA rats and shows promise as a new source of iron supplementation.


Asunto(s)
Anemia Ferropénica/dietoterapia , Quelantes/metabolismo , Compuestos Ferrosos/metabolismo , Hierro/metabolismo , Péptidos/metabolismo , Residuos/análisis , Anemia Ferropénica/metabolismo , Animales , Disponibilidad Biológica , Quelantes/química , Quelantes/aislamiento & purificación , Compuestos Ferrosos/química , Gadiformes , Hemoglobinas/metabolismo , Humanos , Hierro/química , Masculino , Péptidos/química , Péptidos/aislamiento & purificación , Ratas , Ratas Wistar , Transferrina/metabolismo
12.
Sci Rep ; 6: 31427, 2016 08 12.
Artículo en Inglés | MEDLINE | ID: mdl-27514819

RESUMEN

The present study was (i) to prepare two types of selenium nanoparticles, namely an amorphous form of selenium quantum dots (A-SeQDs) and a crystalline form of selenium quantum dots (C-SeQDs); and (ii) to investigate the nano-bio interactions of A-SeQDs and C-SeQDs in MCF-7, HepG2, HeLa, NIH/3T3, L929 cells and BRL-3A cells. It was found that A-SeQDs could induce the mitochondria-mediated apoptosis, necrosis and death of cells, while C-SeQDs had much weaker effects. This polymorphs-dependent anti-proliferative activity of nano-selenium was scarcely reported. Further investigation demonstrated that A-SeQDs could differentially regulate 61 proteins and several pathways related to stress response, protein synthesis, cell migration and cell cycle, including "p38 MAPK Signaling", "p53 Signaling", "14-3-3-mediated Signaling", "p70S6K Signaling" and "Protein Ubiquitination Pathway". This was the first report to demonstrate the involvement of protein synthesis and post-translational modification pathways in the anti-proliferative activity associated with NMs. Compared with previously fragmentary studies, this study use a nanomics approach combining bioinformatics and proteomics to systematically investigate the nano-bio interactions of selenium nanoparticles in cancer cells.


Asunto(s)
Mitocondrias/metabolismo , Proteínas Mitocondriales/metabolismo , Puntos Cuánticos/metabolismo , Selenio/química , Animales , Apoptosis/efectos de los fármacos , Puntos de Control del Ciclo Celular/efectos de los fármacos , Proliferación Celular/efectos de los fármacos , Chaperón BiP del Retículo Endoplásmico , Células HeLa , Proteínas de Choque Térmico/metabolismo , Humanos , Células MCF-7 , Potencial de la Membrana Mitocondrial/efectos de los fármacos , Ratones , Microscopía Confocal , Mitocondrias/efectos de los fármacos , Células 3T3 NIH , Proteína Disulfuro Isomerasas/metabolismo , Puntos Cuánticos/química , Puntos Cuánticos/toxicidad , Transducción de Señal/efectos de los fármacos , Tiorredoxina Reductasa 1/metabolismo
13.
Analyst ; 141(10): 2970-6, 2016 05 10.
Artículo en Inglés | MEDLINE | ID: mdl-27050384

RESUMEN

Seed-mediated synthesis of gold nanorods (AuNRs) has been widely used for diverse applications in the past decade. In this work, this synthetic process is demonstrated for multicolor biosensing for the first time. Our investigation reveals that ascorbic acid acts as a key factor to mediate the growth of AuNRs. This phenomenon is incorporated into the alkaline phosphatase (ALP)-enzyme-linked immunosorbent assay (ELISA) system based on the fact that ALP can catalyze the conversion of ascorbic acid-phosphate into ascorbic acid with high efficiency. This allows us to develop a multicolor ELISA approach for sensitive detection of disease biomarkers with the naked eye. We show the proof-of-concept multicolor ELISA for the detection of prostate-specific antigen (PSA) in human serum. The results show that different colors are presented in response to different concentrations of PSA, and a detection limit of 3 × 10(-15) g mL(-1) in human serum was achieved. The proposed multicolor ELISA could be a good supplement to conventional ELISA for POC diagnostics.

14.
Br J Nutr ; 112(9): 1510-20, 2014 Nov 14.
Artículo en Inglés | MEDLINE | ID: mdl-25231730

RESUMEN

A 12-month, dose-response, randomised, intervention trial was conducted to determine adequate Ca intake levels for Chinese adolescents by investigating the effect of Ca supplementation on bone mineral accretion. A total of 220 Han adolescents (111 girls and 109 boys) aged 12-14 years were recruited. All subjects were randomly divided into three groups. The bone mineral content (BMC) and bone mineral density (BMD) of the whole body, lumbar spine (L1-L4), left hip and femoral neck were measured by dual-energy X-ray absorptiometry. Girls in the high-Ca group (actual Ca intake: 1243 (sd 193) mg/d) exhibited greater increases in the femoral neck BMC compared with those in the low-Ca group (9·7 v. 6·4 %, P =0·04) over the 1-year intervention period. The increases in femoral neck BMC were greater in boys in the high-Ca and medium-Ca groups (actual Ca intake: 985 (sd 168) mg/d) than in those in the low-Ca group (15·7 v. 11·7 %, P =0·03; 15·8 v. 11·7 %, P =0·03). Ca supplementation had significant effects on the whole-body BMC and BMD in subjects with physical activity levels>34·86 metabolic equivalents and on the spine BMD and BMC and BMD of most sites in subjects with Tanner stage < 3. Increasing Ca intake levels with Ca supplementation enhanced femoral neck mineral acquisition in Chinese adolescents. Furthermore, high physical activity levels and low Tanner stage appeared to significantly contribute to the effect of Ca supplementation on bone mass. Whether this is a lasting beneficial effect leading to the optimisation of peak bone mass needs to be determined in other long-term prospective studies.


Asunto(s)
Densidad Ósea/efectos de los fármacos , Calcio de la Dieta/administración & dosificación , Absorciometría de Fotón , Adolescente , Animales , Niño , China , Dieta , Suplementos Dietéticos , Relación Dosis-Respuesta a Droga , Método Doble Ciego , Metabolismo Energético , Ejercicio Físico , Femenino , Cuello Femoral , Alimentos en Conserva , Humanos , Estudios Longitudinales , Vértebras Lumbares , Masculino , Leche , Actividad Motora , Pubertad/fisiología , Factores Sexuales , Encuestas y Cuestionarios
15.
Bone ; 65: 69-76, 2014 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-24844611

RESUMEN

BACKGROUND/OBJECTIVE: Adequate calcium intakes may enhance bone mineral accumulation during childhood. Little is known about the optimal calcium intake in Chinese adolescents. We examined the effects of three levels of calcium intake on bone mineral accretion in adolescents. METHODS: This was a 2-year randomized, double-blind, controlled trial. The subjects were randomly assigned to receive 40 g of milk powder containing 300 mg of calcium and 200 IU of vitamin D (Low-Ca group), or same milk powder additionally fortified with 300 mg of calcium (Mid-Ca group) or 600 mg of calcium (High-Ca group) for 2 years. The subjects' bone mineral density (BMD) and bone mineral content (BMC) at the total body, lumbar spine and left hip were determined by dual-energy X-ray absorptiometry at baseline and after the second year of treatment. Of the 111 girls and 109 boys (aged 12-14 years) enrolled, 91 girls and 91 boys completed the trial. RESULTS: The girls in the High-Ca group (1,110 mg/d) had 2.3%, 2.7% and 2.6% greater BMD accretion at the total hip, femoral neck and shaft (P<0.05) but not at total body less head and spine than those in the Low-Ca group (655 mg/d). A significant effect of higher calcium intake was also observed for percentage change of size-adjusted BMC at femur neck (P=0.047). Bonferroni tests indicated no significant differences in the percentage changes in BMD, BMC or size-adjusted BMC between the Mid- and Low-Ca groups and between the High- and Mid-Ca groups. Extra calcium had no observable additional effect in the boys (P>0.05). CONCLUSION: An intake of 1000 mg/d or more might be helpful in maximizing bone mineral accretion in the hip for girls. But further large studies are required to identify its long-term effects and the optimal calcium intake for boys.


Asunto(s)
Calcificación Fisiológica , Calcio/administración & dosificación , Leche , Pubertad , Adolescente , Animales , Niño , Preescolar , China , Relación Dosis-Respuesta a Droga , Método Doble Ciego , Femenino , Humanos , Masculino
16.
Public Health Nutr ; 16(1): 78-86, 2013 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-22717072

RESUMEN

OBJECTIVE: Previous studies showed an inconsistent association of fruit and vegetable consumption with bone health. We assessed the associations in Chinese adolescents, young and postmenopausal women. DESIGN: A cross-sectional study conducted in China during July 2009 to May 2010. SETTING: Bone mineral density (BMD) and content (BMC) at the whole body, lumbar spine and left hip were measured with dual-energy X-ray absorptiometry. Dietary intakes were assessed using an FFQ. All these values were separately standardized into Z-scores in each population subgroup. SUBJECTS: One hundred and ten boys and 112 girls (11-14 years), 371 young women (20-34 years, postpartum within 2 weeks) and 333 postmenopausal women (50-70 years). RESULTS: After adjustment for potential covariates, analysis of covariance showed a significantly positive association between fruit intake and BMD and BMC in all participants combined (P-trend: < 0.001 to 0.002). BMD Z-score increased by 0.25 (or 2.1 % of the mean), 0.22 (3.5 %), 0.23 (3.0 %) and 0.25 (3.5 %), and BMC Z-score increased by 0.33 (5.7 %), 0.25 (5.8 %), 0.34 (5.9 %) and 0.29 (4.7 %), at the total body, lumbar spine, total hip and femoral neck in participants belonging to the top tertile compared with the bottom tertile of fruit intake (all P < 0.05), respectively. There was no significant association between vegetable intake and bone mass at all bone sites studied except for total body BMD (P = 0.030). Relatively more pronounced effects were observed in boys and postmenopausal women. CONCLUSION: Our findings add to the existing evidence that fruits and vegetables may have a bone sparing effect.


Asunto(s)
Densidad Ósea , Huesos/metabolismo , Dieta/normas , Frutas , Osteoporosis/prevención & control , Fitoterapia , Preparaciones de Plantas/uso terapéutico , Absorciometría de Fotón , Adolescente , Adulto , Factores de Edad , Anciano , Análisis de Varianza , Niño , China , Femenino , Humanos , Persona de Mediana Edad , Osteoporosis/metabolismo , Osteoporosis Posmenopáusica/metabolismo , Osteoporosis Posmenopáusica/prevención & control , Posmenopausia , Factores Sexuales , Encuestas y Cuestionarios , Verduras , Adulto Joven
17.
Int J Nurs Stud ; 46(11): 1423-30, 2009 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-19497571

RESUMEN

OBJECTIVES: To study the effects of music on anxiety and pain in children with cerebral palsy receiving acupuncture daily in a clinical setting. DESIGN: A randomized controlled trial. SETTING: Acupuncture Unit at Shenzhen Hospital of Traditional Chinese Medicine in Shenzhen City of China. PARTICIPANTS: Sixty children with cerebral palsy undergoing acupuncture. INTERVENTION: Children listened to their favorite music or a blank disc for 30 min. MEASUREMENTS: (1) the modified Yale preoperative anxiety scale for children's anxiety (mYPAS); (2) children's hospital of eastern Ontario pain scale (CHEOPS) and Wong-Baker faces pain rating scale (FACES) for pain intensity; (3) vital signs including mean arterial blood pressure (MAP), heart rate (HR) and respiratory rate (RR). RESULTS: An independent sample t-test showed significantly lower mYPAS scores in the music group 30 min after the intervention compared with the control group (t=4.72, P=0.00). Significant differences between groups were found in mYPAS scores (F=4.270, d.f.=1, P=0.043, Partial eta(2)=0.069) and over treatment duration (F=143.421, d.f.=1.521, P=0.000, Partial eta(2)=0.712). A significant interaction was also found (F=4.298, d.f.=1.521, P=0.025, Partial eta(2)=0.069). LSD's post hoc testing confirmed that the mYPAS scores significantly increased from the baseline to 1 min (P=0.000, 95% CI 14.913, 20.257) and then gradually decreased from 1 to 30min (P=0.000, 95% CI -18.952, -13.714). For pain intensity scores, a highly significant time effect was found in both the CHEOPS (F=87.347, d.f.=2, P=0.000, Partial eta(2)=0.601) and FACES (F=225.871, d.f.=1.822, P=0.000, Partial eta(2)=0.796), and a significant interaction effect was found as well (F=4.369, d.f.=2, P=0.015, Partial eta(2)=0.070; F=5.859, d.f.=1.822, P=0.005, Partial eta(2)=0.092). However, no significant difference between groups was present (F=2.343, d.f.=1, P=0.131, Partial eta(2)=0.039; F=3.738, d.f.=1, P=0.058, Partial eta(2)=0.061). Significant differences between groups were found in MAP and HR (P<0.05) and over time (P<0.05), but no significant effects in RR were apparent (P>0.05). A significant interaction effect was found in HR (P<0.05), but not in MAP or RR (P>0.05). CONCLUSIONS: This study demonstrates that listening to music while receiving acupuncture can relieve anxiety among children with cerebral palsy; however, no effect was observed in terms of pain reduction. Further research is needed to explore the types of music which best impact an individual's treatment. Whether music results in fewer accidents and side effects of acupuncture should be investigated. Music can be considered as adjunctive therapy in clinical situations that may be anxiety-provoking for children.


Asunto(s)
Acupuntura , Ansiedad/terapia , Parálisis Cerebral/terapia , Musicoterapia , Manejo del Dolor , Ansiedad/fisiopatología , Presión Sanguínea , Parálisis Cerebral/psicología , Niño , Preescolar , China , Femenino , Frecuencia Cardíaca , Humanos , Masculino , Dolor/fisiopatología , Dimensión del Dolor
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