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1.
Fish Shellfish Immunol Rep ; 4: 100091, 2023 Dec.
Article in English | MEDLINE | ID: mdl-37091066

ABSTRACT

The importance of the gut microbiome in the management of various physiological activities including healthy growth and performance of fish and shellfish is now widely considered and being studied in detail for potential applications in aquaculture farming and the future growth of the fish industry. The gut microbiome in all animals including fish is associated with a number of beneficial functions for the host, such as stimulating optimal gastrointestinal development, producing and supplying vitamins to the host, and improving the host's nutrient uptake by providing additional enzymatic activities. Besides nutrient uptake, the gut microbiome is involved in strengthening the immune system and maintaining mucosal tolerance, enhancing the host's resilience against infectious diseases, and the production of anticarcinogenic and anti-inflammatory compounds. Because of its significant role, the gut microbiome is very often considered an "extra organ," as it plays a key role in intestinal development and regulation of other physiological functions. Recent studies suggest that the gut microbiome is involved in energy homeostasis by regulating feeding, digestive and metabolic processes, as well as the immune response. Consequently, deciphering gut microbiome dynamics in cultured fish and shellfish species will play an indispensable role in promoting animal health and aquaculture productivity. It is mentioned that the microbiome community available in the gut tract, particularly in the intestine acts as an innovative source of natural product discovery. The microbial communities that are associated with several marine organisms are the source of natural products with a diverse array of biological activities and as of today, more than 1000 new compounds have been reported from such microbial species. Exploration of such new ingredients from microbial species would create more opportunities for the development of the bio-pharma/aquaculture industries. Considering the important role of the microbiome in the whole life span of fish and shellfish, it is necessary to understand the interaction process between the host and microbial community. However, information pertaining to host-microbiome interaction, particularly at the cellular level, gene expression, metabolic pathways, and immunomodulation mechanisms, the available literature is scanty. It has been reported that there are three ways of interaction involving the host-microbe-environment operates to maintain homeostasis in the fish and shellfish gut i.e. host intrinsic factors, the environment that shapes the gut microbiome composition, and the core microbial community present in the gut system itself has equal influence on the host biology. In the present review, efforts have been made to collect comprehensive information on various aspects of host-microbiome interaction, particularly on the immune system and health maintenance, management of diseases, nutrient uptake, digestion and absorption, gene expression, and metabolism in fish and shellfish.

2.
Article in English | MEDLINE | ID: mdl-35870418

ABSTRACT

Since proteins play an important role in the life of an organism, many researchers are now looking at how genes and proteins interact to form different proteins. It is anticipated that the creation of adequate tools for rapid analysis of proteins will accelerate the determination of functional aspects of these biomolecules and develop new biomarkers and therapeutic targets for the diagnosis and treatment of various diseases. Though shrimp contains high-quality marine proteins, there are reports about the heavy losses to the shrimp industry due to the poor quality of shrimp production and many times due to mass mortality also. Frequent outbreaks of diseases, water pollution, and quality of feed are some of the most recognized reasons for such losses. In the seafood export market, shrimp occupies the top position in currency earnings and strengthens the economy of many developing nations. Therefore, it is vital for shrimp-producing companies they produce healthy shrimp with high-quality protein. Though aquaculture is a very competitive market, global awareness regarding the use of scientific knowledge and emerging technologies to obtain better-farmed organisms through sustainable production has enhanced the importance of proteomics in seafood biology research. Proteomics, as a powerful tool, has therefore been increasingly used to address several issues in shrimp aquaculture. In the present paper, efforts have been made to address some of them, particularly the role of proteomics in reproduction, breeding and spawning, immunological responses and disease resistance capacity, nutrition and health, microbiome and probiotics, quality and safety of shrimp production, bioinformatics applications in proteomics, the discovery of protein biomarkers, and mitigating biotic and abiotic stresses. Future challenges and research directions on proteomics in shrimp aquaculture have also been discussed.


Subject(s)
Penaeidae , Proteomics , Animals , Aquaculture , Computational Biology , Crustacea , Penaeidae/metabolism , Seafood
3.
Plants (Basel) ; 8(7)2019 Jul 17.
Article in English | MEDLINE | ID: mdl-31319560

ABSTRACT

Natural products derived from plants play a vital role in the discovery of new drug candidates, and these are used for novel therapeutic drug development. Andrographis paniculata and Spilanthes paniculata are used extensively as medicinal herbs for the treatment of various ailments, and are reported to have neuroprotective properties. ß-amyloid is a microscopic brain protein whose significant aggregation is detected in mild cognitive impairment and Alzheimer's disease (AD) brains. The accumulation of ß-amyloid disrupts cell communication and triggers inflammation by activating immune cells, leading to neuronal cell death and cognitive disabilities. The proteases acetylcholinesterase (AChE), butyrylcholinesterase (BChE), and beta secretase-1 (BACE-1) have been reported to be correlated with the synthesis and growth of ß-amyloid plaques in the brains of AD patients. In the present study, the phenolic compounds from A. paniculata and S. paniculata that have been reported in the literature were selected for the current investigation. Furthermore, we employed molecular docking and molecular dynamics studies of the phenolic compounds with the proteins AChE, BChE, and BACE-1 in order to evaluate the binding characteristics and identify potent anti-amyloid agents against the neurodegenerative diseases such as AD. In this investigation, we predicted three compounds from A. paniculata with maximum binding affinities with cholinesterases and BACE-1. The computational investigations predicted that these compounds follow the rule of five. We further evaluated these molecules for in vitro inhibition activity against all the enzymes. In the in vitro investigations, 3,4-di-o-caffeoylquinic acid (5281780), apigenin (5280443), and 7-o-methylwogonin (188316) were found to be strong inhibitors of AChE, BChE, and BACE-1. These findings suggest that these compounds can be potent multi-target inhibitors of the proteases that might cumulatively work and inhibit the initiation and formation of ß-amyloid plaques, which is a prime cause of neurotoxicity and dementia. According to our knowledge, these findings are the first report on natural compounds isolated from A. paniculata as multi-target potent inhibitors and anti-amyloid agents.

4.
J Nutr Sci ; 5: e47, 2016.
Article in English | MEDLINE | ID: mdl-28620474

ABSTRACT

Flavonoids, a group of natural substances with variable phenolic structures, are found in fruits, vegetables, grains, bark, roots, stems, flowers, tea and wine. These natural products are well known for their beneficial effects on health and efforts are being made to isolate the ingredients so called flavonoids. Flavonoids are now considered as an indispensable component in a variety of nutraceutical, pharmaceutical, medicinal and cosmetic applications. This is attributed to their anti-oxidative, anti-inflammatory, anti-mutagenic and anti-carcinogenic properties coupled with their capacity to modulate key cellular enzyme function. Research on flavonoids received an added impulse with the discovery of the low cardiovascular mortality rate and also prevention of CHD. Information on the working mechanisms of flavonoids is still not understood properly. However, it has widely been known for centuries that derivatives of plant origin possess a broad spectrum of biological activity. Current trends of research and development activities on flavonoids relate to isolation, identification, characterisation and functions of flavonoids and finally their applications on health benefits. Molecular docking and knowledge of bioinformatics are also being used to predict potential applications and manufacturing by industry. In the present review, attempts have been made to discuss the current trends of research and development on flavonoids, working mechanisms of flavonoids, flavonoid functions and applications, prediction of flavonoids as potential drugs in preventing chronic diseases and future research directions.

5.
Asian J Sports Med ; 5(4): e24291, 2014 Dec.
Article in English | MEDLINE | ID: mdl-25741421

ABSTRACT

BACKGROUND: Fast-bowlers in cricket subject their spines to repetitive stress. OBJECTIVES: The aim of this study was to review the prevalence of lumbar spine injuries among fast-bowlers. MATERIALS AND METHODS: Medline and embase searches were performed. Further, the authors canvassed the reference list of available articles and used other search engines such as Google Scholar to identify a total of nine studies. RESULTS: The prevalence of lumbar disc degeneration in fast-bowlers ranges from 21-65% with an incidence rate of 15% per year, and the prevalence of lumbar spine bony abnormalities ranges from 24-81%. Factors associated with lumbar spine injury in fast-bowlers are classified into un-modifiable (age) and modifiable (more intense bowling workload and mixed-bowling technique). CONCLUSIONS: Fast-bowlers have a high prevalence of lumbar spine injuries. Appropriate interventions, such as educational sessions, may be able to modify risk factors such as bowling workload and bowling technique and thus reduce injury prevalence.

6.
Osteoporos Int ; 24(10): 2581-9, 2013 Oct.
Article in English | MEDLINE | ID: mdl-23563933

ABSTRACT

SUMMARY: Fractures in post-menopausal osteoporosis cause significant morbidity; however, animal models for post-menopausal fracture healing lack the effect of ageing. Therefore, we developed a model using aged animals with chronic oestrogen deficiency, which demonstrates inferior fracture repair (decreased healing histologically, bone mineral density and content and strength). This novel model may help develop molecular strategies for osteoporotic fracture repair. INTRODUCTION: The femur is susceptible to damage by both systemic conditions such as osteoporosis and locally by traumatic injury. The capacity for fracture repair decreases with age, while the risk of fracture increases. As studies of osteoporotic fracture healing in rats traditionally use a period of 3 months or less of oestrogen deficiency prior to fracturing, we aimed to establish a osteoporosis model in rats with chronic oestrogen deficiency by 12 months to better mimic human female osteoporosis. METHODS: Seventy female Sprague-Dawley rats (10 weeks old) were ovariectomised or sham operated and housed for 12 months. The right femur was fractured by way of an open osteotomy and fixed with an intramedullary Kirschner wire. Animals were sacrificed at 1, 3 and 6 weeks for radiography, dual-energy X-ray absorptiometry, tensile testing and histology. RESULTS: Bone mineral density and bone mineral content were lower by 60 and 63 %, respectively, (p < 0.05) in the bilaterally ovariectomized (OVX) groups than those in the sham groups at 6 weeks in the right fractured femurs. Maximum breaking force of the OVX group was lower than that of the sham group, with the greatest difference seen at 6 weeks following osteotomy. Histologically, the OVX groups demonstrated a delay in cellular differentiation within the fracture callus and the presence of bone resorption. The sham animals had a superior histological healing pattern with an Allen score of 4 at 6 weeks compared to a score of 1 for the OVX groups (p < 0.01). CONCLUSIONS: Long-term ovariectomy has a deleterious effect on fracture healing in a rodent model.


Subject(s)
Estrogens/deficiency , Femoral Fractures/physiopathology , Fracture Healing/physiology , Osteoporotic Fractures/physiopathology , Absorptiometry, Photon , Aging/pathology , Aging/physiology , Animals , Bone Density/physiology , Bony Callus/diagnostic imaging , Bony Callus/pathology , Bony Callus/physiopathology , Disease Models, Animal , Female , Femoral Fractures/diagnostic imaging , Femoral Fractures/pathology , Osteoporosis/physiopathology , Osteoporotic Fractures/diagnostic imaging , Osteoporotic Fractures/pathology , Ovariectomy , Rats , Rats, Sprague-Dawley , Stress, Mechanical
7.
J Nutr Health Aging ; 16(2): 188-92, 2012 Feb.
Article in English | MEDLINE | ID: mdl-22323357

ABSTRACT

OBJECTIVE: Lean body weight (LBW) decreases with age while total body fat increases, resulting in altered drug pharmacokinetics. A semi-mechanistic equation estimating LBW using height, weight and sex has been developed for potential use across a wide range of body compositions. The aim of this study was to determine the ability of the LBW equation to estimate dual energy x-ray absorptiometry-derived fat free mass (FFM(DXA)) in a population of older women with recent hip fracture. METHODS: Baseline, four and 12 month data obtained from 23 women enrolled in the Sarcopenia and Hip Fracture study were pooled to give 58 measurements. LBW was estimated using the equation: LBW (kg) = (9270 x Wt) / (8780 + (244 x BMI)). Body composition was classified as: 'normal' (BMI <25kg/m(2) and not sarcopenic), 'overweight-obese' (BMI >25kg/m(2) and not sarcopenic), 'sarcopenic' (sarcopenic and BMI <25kg/m(2)), or 'sarcopenic-obese' (sarcopenic and BMI >25kg/m(2)). The ability of the LBW equation to predict FFMDXA was determined graphically using Bland-Altman plots and quantitatively using the method of Sheiner and Beal. RESULTS: The mean ± SD age of female participants women was 83±7 years (n=23). Sarcopenia was frequently observed (65.2%). Bland-Altman plots demonstrated an underestimation by the LBW equation compared to FFMDXA. The bias (95% CI) and precision (95% CI) calculated using the method of Sheiner and Beal was 0.5kg (-0.7, 1.66kg) and 4.4kg (-3.7, 12.4kg) respectively for pooled data. CONCLUSION: This equation can be used to easily calculate LBW. When compared to FFMDXA, the LBW equation resulted in a small underestimation on average in this population of women with recent hip fracture. The degree of bias may not be clinically important although further studies of larger heterogeneous cohorts are needed to investigate and potentially improve the accuracy of this predictive equation in larger clinical cohorts.


Subject(s)
Body Composition/physiology , Body Weight/physiology , Mathematics/standards , Muscle, Skeletal/physiology , Absorptiometry, Photon/methods , Absorptiometry, Photon/standards , Aged , Aged, 80 and over , Aging/pathology , Female , Hip Fractures/epidemiology , Hip Fractures/etiology , Humans , Muscle, Skeletal/pathology , Predictive Value of Tests , Sarcopenia/complications , Sarcopenia/diagnosis
8.
Indian J Exp Biol ; 43(3): 209-23, 2005 Mar.
Article in English | MEDLINE | ID: mdl-15816407

ABSTRACT

One problem in aquaculture is obtaining brood because many commercially important species are incapable of spontaneous maturation under artificial conditions. Commercial shrimp hatcheries commonly use eyestalk ablation to stimulate gonadal maturation in shrimps. Research has been conducted on the inhibition of reproductive maturation by hormones originating in the eyestalk glands and on other endocrine sources (e.g.,brain, thoracic ganglion, ovary, mandibular organ, androgenic gland and Y-organs) to determine their roles. Alternate techniques for acceleration of gonad maturation through the use of synthetic hormones or neurotransmitters may benefit aquaculture. Neurohormones and neuroregulators have been shown to accelerate gonadal maturation but an effective delivery technique must be developed for use in a large-scale aquaculture operation.


Subject(s)
Decapoda/physiology , Endocrinology/methods , Invertebrate Hormones/physiology , Animals , Female , Male , Neurotransmitter Agents , Peptides/physiology , Reproduction
9.
J Orthop Res ; 19(1): 136-42, 2001 Jan.
Article in English | MEDLINE | ID: mdl-11332610

ABSTRACT

We investigated the temporal expressions of the three nitric oxide synthase (NOS) isoforms by semi-quantitative polymerase chain reaction (PCR) assays and by immunoblot analysis, following Achilles tendon transection in rats. Four days after injury, there were increases in the steady-state levels of mRNA for all three NOS isoforms, with peaks for the inducible isoform (iNOS) (23-fold increase) at day 4, the endothelial isoform (eNOS) (24-fold increase) at day 7 and the neuronal isoform (bNOS) (seven-fold increase) at day 21. The temporal expression of NOS isoforms at a protein level was consistent with the results at the mRNA level. We have previously shown a five-fold increase in the NOS activity, as detected by 3H-arginine to 3H-citrulline conversion, at day 7 postinjury. These findings indicate that all three NOS isoforms are expressed during tendon healing with differential expression patterns during the various phases of tendon healing. These findings may prove clinically relevant with respect to strategies for regulating tendon healing.


Subject(s)
Achilles Tendon/enzymology , Nitric Oxide Synthase/genetics , Wound Healing , Animals , Nitric Oxide/biosynthesis , Nitric Oxide Synthase/analysis , Nitric Oxide Synthase Type I , Nitric Oxide Synthase Type II , Nitric Oxide Synthase Type III , RNA, Messenger/analysis , Rats , Reverse Transcriptase Polymerase Chain Reaction
10.
J Bone Miner Res ; 16(3): 535-40, 2001 Mar.
Article in English | MEDLINE | ID: mdl-11277271

ABSTRACT

We have shown previously that nitric oxide (NO) has regulatory effects on fracture healing. Our aim here was to investigate the temporal expression patterns of the three NO synthase (NOS) isoforms that are responsible for the generation of NO by semiquantitative competitive polymerase chain reaction (PCR) and immunoblot analysis after femoral fractures in rats. We found that 4 days after fracture, there were increases in the levels of messenger RNA (mRNA) for all three NOS isoforms, with peaks for the inducible NOS (iNOS; 35-fold increase, p < 0.05) at day 4, the endothelial NOS (eNOS; 5-fold increase, p < 0.05) at day 7, and the neuronal NOS (bNOS; 16-fold increase, p < 0.05) at day 21. At a protein level, the time course expression of NOS isoforms was consistent with the results of those at the mRNA level. In addition, we have previously reported a 2.5-fold increase in NOS activity detected by [3H]arginine to [3H]citrulline conversion at day 15 compared with that at day 4 after fracture. The findings that the expression of NOS isoforms during fracture healing is type specific and time dependent are important and may have clinical applications in the regulation of bone repair by NOS inhibitors or stimulators at different stages after injury.


Subject(s)
Fracture Healing/physiology , Nitric Oxide Synthase/metabolism , Animals , Blotting, Western , Femoral Fractures/metabolism , Femoral Fractures/physiopathology , Isoenzymes/metabolism , Male , Nitric Oxide Synthase/genetics , Nitric Oxide Synthase Type II , Nitric Oxide Synthase Type III , Polymerase Chain Reaction , Rats , Rats, Sprague-Dawley
11.
Bone ; 28(1): 80-6, 2001 Jan.
Article in English | MEDLINE | ID: mdl-11165946

ABSTRACT

Osteoporotic fractures commonly occur in the elderly. Although current therapies are aimed at the prevention and treatment of osteoporotic fractures, studies examing the fracture healing process in osteoporotic bone are limited. We produced an osteoporotic rat model by ovariectomy (ovx) and maintained a low calcium diet (LCD) in order to evaluate the influence of osteoporosis on fracture healing. Callus formation and strength was monitored over a 3 week period by histological and biomechanical assessment. Data collected simultaneously on a group of rats undergoing sham surgery (sx) were used for comparison. A 40% reduction in fracture callus cross-sectional area and a 23% reduction in bone mineral density in the healing femur of the ovx rats was observed on day 21 following fracture as compared with the sx group (p < 0.01). Biomechanical data from the healing femur of the ovx rats revealed a fivefold decrease in the energy required to break the fracture callus, a threefold decrease in peak failure load, a twofold decrease in stiffness and a threefold decrease in stress as compared with the sx group (p < 0.01, respectively). Histomorphological analysis revealed a delay in fracture callus healing with poor development of mature bone in the ovx rats. This study provides physical evidence of altered fracture healing in osteoporotic bone, which may have important implications in evaluating the effects of new treatments for osteoporosis on fracture healing.


Subject(s)
Bony Callus/physiopathology , Femoral Fractures/physiopathology , Osteoporosis/physiopathology , Animals , Bone Density , Bony Callus/pathology , Calcium, Dietary/pharmacology , Disease Models, Animal , Estrogens/deficiency , Female , Femoral Fractures/pathology , Femoral Neck Fractures/pathology , Femoral Neck Fractures/physiopathology , Osteoporosis/pathology , Ovariectomy , Rats , Rats, Sprague-Dawley
12.
Orthop Clin North Am ; 31(3): 453-64, 2000 Jul.
Article in English | MEDLINE | ID: mdl-10882470

ABSTRACT

A current focus of treatment for degenerative disk disease is the restoration of the intervertebral disk. This article summarizes the structure and function of the intervertebral disk, the pathogenesis of its degeneration, and the clinical relevance of degenerative disk disease. Current literature relating to intervertebral disk replacement and regeneration is reviewed.


Subject(s)
Culture Techniques , Intervertebral Disc/surgery , Regeneration/physiology , Spinal Diseases/surgery , Transplants , Animals , Genetic Therapy , Growth Substances/physiology , Humans , Intervertebral Disc/physiopathology , Spinal Diseases/physiopathology
13.
Orthop Clin North Am ; 31(3): 473-84, 2000 Jul.
Article in English | MEDLINE | ID: mdl-10882472

ABSTRACT

Gene therapy is a novel therapeutic modality for repair and regeneration of musculoskeletal tissues, including the spine. Various methods for therapeutic gene transfer are presented in this article. Several studies in which gene transfer has been used specifically to enhance spine fusion in animal models are reviewed.


Subject(s)
Genetic Therapy/methods , Spinal Fusion/methods , Transforming Growth Factor beta , Adaptor Proteins, Signal Transducing , Animals , Bone Morphogenetic Protein 2 , Bone Morphogenetic Proteins/genetics , Carrier Proteins/genetics , Cytoskeletal Proteins , Disease Models, Animal , Gene Transfer Techniques , Humans , Intracellular Signaling Peptides and Proteins , LIM Domain Proteins
14.
J Bone Miner Res ; 15(2): 342-51, 2000 Feb.
Article in English | MEDLINE | ID: mdl-10703937

ABSTRACT

The role of the messenger molecule nitric oxide has not been evaluated in fracture healing. NO is synthesized by three kinds of nitric oxide synthase (NOS): inducible NOS (iNOS), endothelial (eNOS), and neuronal (bNOS). We evaluated the role of these enzymes in a rat femur fracture-healing model. There was no messenger RNA (mRNA) expression, immunoreactivity, or enzymatic activity for NOS in unfractured femoral cortex. After fracture, however, mRNA, protein, and enzymatic activity for iNOS were identified in the healing rat femoral fracture callus, with maximum activity on day 15. The mRNA expression for eNOS and bNOS was induced slightly later than for iNOS, consistent with a temporal increase in calcium-dependent NOS activity that gradually increased up to day 30. mRNA expression for the three NOS isoforms also was found in six of six human fracture callus samples. To study the effect of suppression of NO synthesis on fracture healing, an experimental group of rats was fed an NOS inhibitor, L-nitroso-arginine methyl ester (L-NAME), and the control group was fed its inactive enantiomer, D-nitroso-arginine methyl ester (D-NAME). An 18% (p < or = 0.01) decrease in cross-sectional area and a 45% (p < or = 0.05) decrease in failure load were observed in the NOS-inhibited group on day 24 after fracture. Furthermore, the effect of NO supplementation to fracture healing was studied by delivering NO to the fracture site using carboxybutyl chitosan NONOate locally. On day 17 after fracture, there was a 30% (p < or = 0.05) increase in cross-sectional area in the NO-donor group compared with the NOS inhibition group. These results show for the first time that NO is expressed during fracture healing in rats and in humans, that suppression of NOS impairs fracture healing, and that supplementation of NO can reverse the inhibition of healing produced by NOS inhibitors.


Subject(s)
Femoral Fractures , Femur/injuries , Femur/metabolism , Fracture Healing , Nitric Oxide/metabolism , Animals , Fracture Healing/drug effects , Humans , Isoenzymes/metabolism , Male , NG-Nitroarginine Methyl Ester/pharmacology , Nitric Oxide Synthase/antagonists & inhibitors , Nitric Oxide Synthase/metabolism , RNA, Messenger/analysis , Rats , Rats, Sprague-Dawley
15.
Pediatr Radiol ; 28(12): 967-74, 1998 Dec.
Article in English | MEDLINE | ID: mdl-9880643

ABSTRACT

BACKGROUND: Klippel-Feil syndrome (KFS) is characterised by congenital vertebral fusion of the cervical spine and a wide spectrum of associated anomalies. KFS has often been considered a sporadic syndrome. However, since the publication of the original KFS classification early this century, a number of KFS families have indicated heterogeneity complicated by a broad range of variable expression. OBJECTIVE: The two major objectives of this study were (1) to identify differences and similarities in the postnatal appearance, morphology, position and inheritance of vertebral fusions within and between KFS families and (2) to establish a new KFS classification focussed on KFS aetiology. MATERIALS AND METHODS: Vertebral fusions were assessed via spinal radiography. Chromosomal karyotypes were performed using routine cytogenetics. RESULTS: The medical histories of three KFS families are presented. The postnatal time, position and appearance of vertebral fusions, associated anomalies and mode of inheritance were different for the three KFS families. Four classes of KFS are described in a comprehensive classification table that allays much of the uncertainty arising from KFS heterogeneity and variable expression. CONCLUSION: We have described four different KFS classes (KF1-4) within a comprehensive classification that addresses KFS genetic heterogeneity. The position of vertebral fusions in the cervical spine and their incidence within affected families are delineating features of KFS.


Subject(s)
Klippel-Feil Syndrome/classification , Adult , Female , Humans , Infant , Infant, Newborn , Klippel-Feil Syndrome/diagnostic imaging , Klippel-Feil Syndrome/genetics , Male , Pedigree , Radiography , Spine/abnormalities , Spine/diagnostic imaging
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