Wyniki wyszukiwania - Biblioteka Nauki

1

MANGO GINGER SUPPLEMENTATION MAY PROTECT BONE DAMAGE INDUCED BY METHOTREXATE IN RATS

100%

Sahin K. , Erten F. , Tuzcu M. , Orhan C. , Ozercan I. H. , Balci T. A. , Tuzcu Z. , Juturu V.

Acta Poloniae Pharmaceutica - Drug Research

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2019

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tom 76

|

nr 2

305-312

EN

Mango ginger (MG) has antiinflammatory and antioxidant properties. The objective of this study was to investigate the potential protective role of MG and the mechanisms against methotrexate (MTX) induced bone damage in rats. A total of 28 Sprague-Dawley rats were divided into four groups: i) control; ii) MG, rats were treated orally with 50 mg/kg/day of MG, iii) MTX, rats were injected with 0.75 mg/kg of MTX from 8th to 12th day for 5 days and iv) MTX+MG group, rats were treated with 50 mg/kg/day of MG and injected with MTX from 8th to 12th day for 5 days. MTX pretreatment increased blood urea nitrogen and creatinine levels and aminotransferase enzyme activities, while tibia osteocalcin levels and bone mineral density (BMD) decreased (p < 0.001). MG pretreatment markedly attenuated aminotransferases activities and creatinine levels and increased tibia osteocalcin levels and femur BMD in the MTX + MG groups. MTX treatment increased levels of bone nuclear factor kappa beta ligand receptor-activator (RANKL), interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNF-α) and decreased the bone osteoprotegerin (OPG) and type1 collagen levels (p < 0.001). The effect of MG treatment on RANKL, IL-6, TNF-α, OPG and type1 collagen levels induced by MTX was observed actual effects (p < 0.05). Similarly, the protective effect of MG against MTX was confirmed by histological examination. In conclusion, MG pretreatment reduced the negative effects of MTX on bone damage by improving BMD and modulation of RANKL, IL-6, TNF-α, OPG and type1 collagen expressions in the rats.

2

Association between estrogen receptor alpha gene polymorphisms and bone mineral density in Polish female patients with Graves' disease

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Ignaszak-Szczepaniak M. , Horst-Sikorska W. , Dytfeld J. , Gowin E. , Słomski R. , Stajgis M.

Acta Biochimica Polonica

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2011

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tom 58

|

nr 1

101-109

EN

Graves' (GD) hyperthyroidism leads to reduced bone mineral density (BMD) accompanied by accelerated bone turnover. Ample studies have identified association between estrogen receptor (ESR1) gene polymorphism and decreased BMD and osteoporosis. In contrast, number of publications that link ESR1, BMD and Graves' disease is limited. The purpose of this study was to identify the association between ESR1 polymorphisms and BMD in premenopausal women with GD and to determine whether ESR1 polymorphic variants can predispose to GD. The study included 75 women aged 23-46 years with GD and 163 healthy controls. BMD was measured at lumbar spine and femoral neck. We investigated two SNPs in the ESR1 gene and analyzed genetic variants in the form of haplotypes reconstructed by statistical method. Three out of four possible haplotypes of the PvuII and XbaI restriction fragment length polymorphisms were found in GD patients: px (55.3 %), PX (33.3 %) and Px (11.4 %). Women homozygous for xx of XbaI and for pp of PvuII had the lowest BMD at lumbar spine. Moreover, the px haplotype predisposed to reduced lumbar BMD. No associations were observed for femoral neck BMD. No statistically significant relationship were found between ESR1 polymorphisms or their haplotypes and GD. These results indicate that the PvuII and the XbaI polymorphisms of ESR1 gene are associated with bone mineral density in premenopausal women with GD and may help to estimate the risk of bone loss particularly at lumbar spine. However, none of the ESR1 gene alleles predict the risk of GD in Polish female patients.

3

Association analysis of vitamin D receptor gene polymorphisms with bone mineral density in young women with Graves' disease

100%

Horst-Sikorska W. , Ignaszak-Szczepaniak M. , Marcinkowska M. , Kaczmarek M. , Stajgis M. , Slomski R.

Acta Biochimica Polonica

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2008

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tom 55

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nr 2

371-380

EN

Graves' (GD) hyperthyroidism induces accelerated bone turnover that leads to decreased bone mineral density (BMD). The role of the VDR gene in predisposition to primary osteoporosis has been recognized. Recent studies show associations between the VDR gene polymorphisms and susceptibility to autoimmune diseases. Here we analyzed if VDR gene polymorphisms: BsmI, ApaI, TaqI, and FokI may predispose women with Graves' hyperthyroidism to BMD reduction or to disease development. The subjects were 75 premenopausal female Polish patients with GD and 163 healthy women. The genotyping was performed by the use of the restriction fragment length polymorphism analysis (RFLP). We studied the association of the VDR polymorphisms and their haplotypes with patients' BMD and also SNPs and haplotypes association with Graves' disease. We found a strong linkage disequilibrium for the BsmI, ApaI, and TaqI polymorphims that formed three most frequent haplotypes in Graves' women: baT (47.9%), BAt (34.9%), and bAT (16.4%). We did not show statistically significant association of analyzed VDR polymorphisms or haplotypes with decreased bone mineral density in Graves' patients. However, the presence of F allele had a weak tendency to be associated with Graves' disease (with OR=1.93; 95% CI: 0.97-3.84; p=0.058). In conclusion: VDR gene polymorphisms do not predict the risk of decreased BMD in Polish women with Graves'. It may be speculated that the F allele carriers of the VDR-FokI polymorphism are predisposed to Graves' disease development.

4

Bone Mineral Density and Body Composition of Senior Female Students of the University of the Third Age in View of Their Diverse Physical Activity

100%

Ignasiak Z. , Skrzek A. , Dąbrowska G.

Human Movement

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2009

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tom 10

|

nr 2

109-115

EN

Purpose. Human physical activity is an important component of health and it gains a special significance with age, influencing the quality of life of elderly people. The present study discusses the question of whether the level of physical activity is a sufficient stimulus to evoke positive changes in body composition and bone mineral density in women from the University of the Third Age. Basic procedures. The research was conducted on 90 women aged between 65 and 74, students of the U3A. The subjects were divided into two groups on the basis of the amount of their level of physical activity declared by them in questionnaires (1-2 times a week - low physical activity group; 3 and more times a week - high physical activity group). The following measurements were taken: body weight and body height (on the basis of which the BMI was calculated for each subject), body composition including percent fat and water content as well as the amount of body fat and water, with the aid of Futurex-5000 (NIR technique). Dual-energy X-ray absorptiometry (DXA) was used to measure the bone mineral density (BMD) of the proximal segment of the femoral bone (g/cm2) with the Lunar DPX-plus densitometer. Main findings. Mean, standard deviation and coefficient of variation were applied in the statistical analysis. The differences between the variables were analyzed with Student's t-test. Conclusions. The research results imply the necessity of conducting a systematic and thorough analysis of the lifestyle and quality of life of elderly people.

5

Hand radiograms as an alternative for bone mass screening in cystic fibrosis

88%

Minarowska A. , Minarowski Ł., Ł , Tomalak W. , Zając J. , Pogorzelski A. , Radliński J. , Milewska, A.J , Kirpsza B. , Szajda, Sł. D , Chyczewska E.

Progress in Health Sciences

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2013

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tom 3

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nr 1

7-12

EN

Purpose: Cystic fibrosis (CF) is a genetic, metabolic disease. Long-term therapy often leads to inappropriate calcification of bones. Dual X-ray absorptiometry (DXA) is considered a „gold-standard” for bone mineral density (BMD) assessment, but high usage costs can limit its availability. This paper compares two methods for BMD assessment in CF patients: hand radiograms method and densitometry using DXA method. Materials and methods: The study was performed in a group of 26 CF patients (10F, 16M), aged 7-30 years. In all cases, DXA measurements were performed, along with bone mass assessment using DENSY2004 system for digital assessment of hand radiograms. Stepwise binary logistic regression was used to examine the contribution of bone age, BMI, Cole's index and hand radiograms parameters to low BMD expressed as Z-score ≤-1SD. Results: Statistical analysis of the gathered data revealed that hand radiograms method allow for estimation of Z-score below -1SD with accuracy of 84.62% comparing to DXA. Sensitivity and specificity of this estimation in the studied group of CF patients was 86.67% and 81.82%. Conclusions: Hand radiograms method has good accuracy, sensitivity and specificity; therefore, it can be an alternative for DXA in BMD assessment. It can be implemented in chronic diseases affecting BMD like cystic fibrosis.

6

The risk for falls in older people in the context of objective functional studies

88%

Ignasiak Z. , Skrzek A. , Kozieł S. , Sławińska T. , Posłuszny P. , Rożek K.

Anthropological Review

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2015

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tom 78

|

nr 3

337-346

EN

Falls may occur in each ontogenesis phase, but they become more frequent in the elderly and lead to serious health consequences. Dynamic changes in senior citizens’ environment and lifestyle makes studies of risk for falls necessary. To determine the relationship between the risk for falls and the objective functional and structural examination in the elderly living in Poland. The research consisted of 196 females and 61 males aged 60-88 recruited from health clinics, senior citizen centers and Universities of the Third Age between 2009-2012. Following parameters were collected: functional physical tests “30 second Chair Stand Test” and Timed Up and Go Test”, the flexor muscles and knee extensors force, the bone mineral density was measured in distal radius of the forearm with the EXA - 3000, the total risk for fall assessed by 5 tests by abbreviated version of Fallscreen test. Multiple linear regression and linear correlation were used for assessment of relationship with total estimated risk for fall and other parameters. The subjects displayed significant dimorphic differences within the range of the functional parameters and bone mineral density to the advantage of males. Only in women results revealed a significant link between the risk for falls and the dynamic balance, as well as the maximum quadricep muscle force equal. Strength of the lower limb muscles seems to be critical for decreasing the risk for fall. Special programs for strengthening this part of the body for older people should be elaborate.

7

Whole Body Vibration Training is Osteogenic at the Spine in College-Age Men and Women

88%

Ligouri G. , Shoepe T. , Almstedt H.

Journal of Human Kinetics

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2012

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tom 31

55-68

EN

Osteoporosis is a chronic skeletal disease characterized by low bone mass which is currently challenging the American health care system. Maximizing peak bone mass early in life is a cost-effective method for preventing osteoporosis. Whole body vibration (WBV) is a novel exercise method with the potential to increase bone mass, therefore optimizing peak bone and decreasing the risk for osteoporotic fracture. The aim of this investigation was to evaluate changes in bone mineral density at the hip, spine, and whole body in college-age men and women who underwent a WBV training protocol. Active men (n=6) and women (n=4), ages 18-22 participated in the WBV training; while an additional 14 volunteers (1 male, 13 female) served as controls. All participants completed baseline and follow-up questionnaires to assess health history, physical activity, dietary intake, and menstrual history. The WBV training program, using a Vibraflex 550, incorporated squats, stiff-leg dead lifts, stationary lunges, push-up holds, bent-over rows, and jumps performed on the platform, and occurred 3 times a week, for 12 weeks. Dual energy x-ray absorptiometry (Hologic Explorer, Waltham, MA, USA) was used to assess bone mineral density (BMD, g/cm2). A two-tailed, t-test identified significantly different changes in BMD between the WBV and control groups at the lateral spine (average change of 0.022 vs. -0.015 g/cm2). The WBV group experienced a 2.7% and 1.0% increase in BMD in the lateral spine and posterior-anterior spine while the control group decreased 1.9% and 0.9%, respectively. Results indicate that 12 weeks of WBV training was osteogenic at the spine in college-age men and women.

8

Osteoporoza w mukowiscydozie/ Osteoporosis in cystic fibrosis

75%

Kołodziej M. , Wiśniowska A.

Advances in Rehabilitation

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2015

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tom 29

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nr 1

39-44

EN

Mucoviscidosis is a genetic disease caused by the malfunction of Cystic Fibrosis Transmembrane Regulator. This disease is manifested primarily in the respiratory and gastrointestinal systems. Cystic fibrosis affects skeletal system, leads to low bone mineral density and causes osteopenia and osteoporosis. Bone density changes in cystic fibrosis depends on disorders of the respiratory and gastrointestinal systems or are associated with genetic alterations. The most frequently used bone density test is densitometry, which is performed every two to five years. Determining the level of vitamins D, K and calcium and bone turnover markers. Treatment of cystic fibrosis is consisting of pharmacotherapy and physiotherapy. Pharmacological treatment is primarily supplementation vitamins D, K and calcium as well as bisphosphonates, parathyroid hormone and growth hormone therapy. Unfortunately pharmacotherapy of mucoviscidosis is difficult due to mutual interaction of drugs and negative effect of certain drugs e.g. steroids on bone density. Pharmacotherapy treatment should be used together with physiotherapy. Essential rehabilitation elements are respiratory therapy, whole body exercises and physical activity in everyday life. These activities affect the long-therm improvement in treatment effects and leads to increasing of lifetime and quality of life of the patients. Consequences of cystic fibrosis e.g musculoskeletal pain, posture defects and diabetes are more frequently occurs and require using appropriate strategy of physiotherapy.

9

Accuracy of quantitative ultrasound parameters in the diagnosis of osteoporosis

75%

Pais R. , Campean R. , Simon S.-P. , Bolosiu C. , Muntean L. , Bolosiu H.

Open Medicine

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2010

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tom 5

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nr 4

478-485

EN

Quantitative ultrasound (QUS) is of increasing interest for evaluation of osteoporosis because, compared with dual-energy X-ray absorptiometry (DXA), it is portable, less expensive, and radiation-free. The aim of our study was to determine the sensitivity, specificity, and cut-off values of quantitative ultrasound parameters in identifying patients with osteoporosis compared to the World Health Organization (WHO) standard definition. We performed a cross-sectional investigational study of 73 subjects, and determined total hip and lumbar spine T-scores by dual-energy X-ray absorptiometry (DXA) (Prodigy Advance Lunar-GE). The QUS parameters (broadband ultrasound attenuation [BUA], speed of sound, bone mineral density, the stiffness index, and QUS T-score) were determined with Sahara Hologic equipment. The AUC was 0.81 (95% CI 0.67–0.95, p<0.05) for speed of sound (SOS) and 0.76 (95% CI 0.62–0.90, p<0.05) for BUA for the patients with DXA T-scores ≥ −1 DS; the cut-off values were 1542.2 meters per second for SOS and 63.3 dB/MHz for BUA. In patients with DXA T-scores ≤ − 2.5 DS, AUC was 0.80 (95% CI 0.70–0.90, p<0.05) for SOS, and 0.76 (95% CI 0.65–0.87, p<0.05) for BUA. The cut-off values were 1504.95 meters per second for SOS and 49.5 dB/MHz for BUA. Pearson correlation coefficients were positive and statistically significant (> 50%) for all QUS parameters in both groups, (2-tailed, p<0.05). QUS parameters correctly identified normal patients (false negative 34.21% and false positive 2.53%) and those with osteoporosis (false negative 8.55% and false positive 7.82%). The patients with QUS parameters between the cut-off values corresponding to DXA T-scores of −1 SD and − 2.5 SD should be further evaluated by DXA.

10

Degree of mineralisation of bones in children with idiopathic scoliosis. Do these children show a reduced bone mineral density?

63%

Deja A. , Nowacka-Pikuła D.

Medical Rehabilitation

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2015

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tom 19(2)

5-9

PL

Wstęp: Skolioza idiopatyczna jest trójpłaszczyznową deformacją kręgosłupa o nieznanej etiologii. Stanowi ona u dzieci poważny problem kliniczny z uwagi na możliwość jej progresji, deformacji tułowia oraz możliwych zaburzeń oddychania. Wciąż nie jest do końca jasny związek między mineralizacją kości a ryzykiem rozwoju skoliozy u dzieci. Potwierdzenie takiej korelacji mogłoby przyczynić się zarówno do zmiany dotychczasowego leczenia, jak również do wczesnej interwencji rehabilitacyjnej dzieci z obniżoną gęstością kości. Cel pracy: Celem pracy była ocena gęstości mineralnej kości u dzieci ze skoliozą idiopatyczną, zgodnie z wytycznymi Międzynarodowego Towarzystwa Densytometrii Klinicznej (ISCD). Materiał i metody: 57 dzieci ze skoliozą idiopatyczną w wieku od 5,5 do 18 lat. Kąt skoliozy wyznaczano na zdjęciu rtg kręgosłupa metodą Cobba. Kąt rotacji tułowia wg Bunnella oceniano w teście Adamsa za pomocą skoliometru. Badania densytometryczne kręgosłupa L1-L4 wykonano za pomocą densytometru, opartego o metodę absorpcjometrii promieniowania rentgenowskiego o podwójnej energii (DEXA). Wyniki: Spośród 57 pacjentów ze skoliozą Z-score równy lub poniżej – 2,0 SD występował u 5 badanych dzieci (9%). Nie zaobserwowano statystycznie istotnej korelacji między gęstością mineralną kości a skrzywieniem kręgosłupa, jak również między wartością Z-score a skrzywieniem kręgosłupa. Wnioski: Nasze badania wskazują, że u dzieci ze skoliozą nie obserwuje się obniżonej gęstości mineralnej kości. Badanie densytometryczne u dzieci ze skoliozą jest trudne do interpretacji, ponieważ obok czynników związanych z ciągłym procesem rośnięcia szkieletu i dużymi różnicami międzyosobniczymi w rozmiarze kości u dzieci w tym samym wieku, na wynik wpływają też czynniki związane ze skoliozą, tj. rotacja kręgu w miejscu pomiaru oraz deficyt wzrostu związany ze skrzywieniem kręgosłupa.

EN

Introduction: Idiopathic scoliosis constitutes a serious clinical problem due to the risk of progression, trunk deformation and possible respiratory disorders. The relation between the bone mineral density (BMD) and the risk of scoliosis developing in children is still unclear. However, confirmation of such a relation could result in both modifications of the current treatment and an earlier rehabilitation in children with decreased bone mineral density. Aim: The aim of the study was to assess the BMD in children with idiopathic scoliosis, in accordance with the guidelines of the International Society of Clinical Densitometry (ISCD). Materials and methods: a total of 57 children with idiopathic scoliosis aged 5.5 to 18.0 years took part in the study. Anteroposterior (AP) radiographs were taken to determine the Cobb angles. Also, the trunk axial rotation angles according to Bunnell were evaluated using Adam’s test with a scoliometer. The densitometric examinations of the L1-L4 spine were performed using a densitometer, based on Dual-energy X-ray absorptiometry (DEXA). Results: Among the 57 patients with scoliosis, a Z-score equal or below – 2.0 SD occurred in 5 of the examined children (9%). a statistically significant correlation between the BMD and the spine angle, and between the Z-score value and the spine angle, was not observed. Conclusions: Our study indicates that a decreased bone mineral density is not observed in the population of children with scoliosis. The densitometric examination of the children with scoliosis is difficult to interpret, due to their continuous skeletal grow and the great differences in bone size between individuals of the same age, as well as rotations of the analysed vertebrae, and the limited growth due to scoliosis.

11

Analiza tekstur obrazów radiologicznych dla detekcji zmian gęstości mineralnej tkanki kostnej

63%

Cichy P. , Materka A. , Tuliszkiewicz J.

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1998

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tom nr 3

51-63

PL

W artykule przedstawiono zastosowanie cyfrowych technik obróbki i analizy obrazów rentgenowskich do oceny zmian w gęstości mineralnej kości. Rezultaty analizy odniesiono do pomiarów densytometrycznych, wykonanych metodą DXA. Obrazy rentgenograficzne, przedstawiające dalszą część przedramienia, były zarejestrowane z zachowaniem jednakowych warunków technicznych. Dodatkowo w celu ujednolicenia jasności radiogramów zastosowano fantom kalibracyjny. Analizie poddano zarówno obrazy z wyrównaną jasnością fantomu, jak i bez standaryzacji. Zdjęcia rentgenowskie przetworzono na postać cyfrową przy użyciu systemu obrazowego wyposażonego w kamerę CCD. W artykule przedstawiono algorytmy wyznaczania poszczególnych parametrów statystycznych oraz wymiaru fraktainego obrazów cyfrowych. Rozważano wartość oczekiwaną jasności, odchylenie standardowe jasności, skośność histogramu, współczynnik skupienia-kurtozę, energię i entropię oraz wymiary fraktalne estymowane w dziedzinie częstotliwości i metodą wariancyjną. Dlu poszczególnych parametrów wyznaczono ich wartość średnią, odchylenie standardowe oraz współczynnik korelacji liniowej z gęstością tkanki kostnej dystalnego odcinka kości promieniowej. Celem badań byio określenie związków korelacyjnych między parametrami obrazu a wynikami pomiarów densytometrycznych.

EN

Digital image processing and analysis techniques for detection of changes in bone mineral density (BMD) are examined m this paper Analysis results are compared with BMD measured using DXA method. A further part of forearm (Radius UD) is examined. Roentgenogram patterns were registered in the same conditions of exposure and chemical development. Additionally a calibration phantom was used to standardize the results. Radiogram patterns were digitized with a CCD camera. Algorithms for computation of statistical parameters of roentgenogram textures and their fractal dimension are presented. The following texture parameters were computed the mean of intensity, standard deviation of intensity, skewness, kurtosis, energy, entropy and fractal dimension. Fifty radiograms were analyzed. The mean value, standard deviation and coefficient of linear correlation with BMD were estimated for every parameter. Occurrence probability of intensity level is highly correlated with densitometry results. It seems that analysis of fractal dimension can additionally enrich diagnostic knowledge about bone microarchitecture.

12

Osteoimmunologia, czyli o wzajemnych oddziaływaniach komórek układów kostnego i odpornościowego

63%

Majewski P.

Kosmos

|

2017

|

tom 66

|

nr 4

665-675

PL

Wzajemne oddziaływania pomiędzy komórkami układu odpornościowego, a komórkami tkanki kostnej są opisywane od ponad 40 lat. Pomimo upływu czasu, w polskiej literaturze, stosunkowo rzadko się o nich wspomina, a termin osteoimmunologia będący określeniem interdyscyplinarnej nauki zajmującej się tymi oddziaływaniami, praktycznie nie jest używany. Celem niniejszego artykułu jest próba przybliżenia tej dziedziny wiedzy, opisania nowości w spojrzeniu na regulację metabolizmu tkanki kostnej oraz zwrócenia uwagi na szerszy kontekst regulacyjny, związany z istnieniem osi nerki - kości - jelito. Homeostaza zarówno poziomu składników mineralnych osocza krwi, jak i gęstości mineralnej kości zostaje zachowana na skutek dynamicznych zmian aktywności komórek kościotwórczych osteoblastów, komórek kościogubnych osteoklastów oraz osteocytów, będących jedną z końcowych form dojrzewających osteoblastów, aktywnie regulujących te procesy. Równowaga pomiędzy aktywnością wszystkich typów komórek jest regulowana między innymi przez hormony i cytokiny oraz przez bezpośredni kontakt z komórkami odpornościowymi. Czynniki te wpływają na poziom uwalniania i odkładania substancji mineralnych, odpowiednio przez osteoklasty i osteoblasty.

EN

Interactions between cells of the immune system and cells of bone tissue are reported for over 40 years. Despite the passage of time, relatively little about them is mentioned in Polish literature and the term osteoimmunology is practically not used. The purpose of this article is an attempt to outline shortly current knowledge in this field, with particular attention paid to regulation of bone tissue metabolism linked to the existence of the kidney-bone-gut axis.. Homeostasis of both the level of minerals in the blood plasma and the mineral density of the bone is maintained as a result of dynamic changes in the activity of osteoblasts, osteoklasts and osteocytes, being one of the final forms of maturing osteoblasts, actively regulating these processes. The balance between the activities of these cells is regulated by, inter alia, hormones and cytokines as well as direct contact with immune cells. These factors affect the level of mineral release and deposition by osteoclasts and osteoblasts, respectively.