Objective To observe the impact factors of obesity(Ob)complicated with type 2 diabetes mellitus(T2DM).Methods Twenty Ob patients complicated with T2DM(group A)and 47 simple Ob patients(group B)were retrospectively enrolled.The blood glucose related indicators,including fasting blood glucose(FBG),fasting insulin(FINS)and glycosylated hemoglobin(HbA1c),homeostasis model assessment of insulin resistance(HOMA-IR),as well as fat quantitative parameters measured with dual-energy X-ray absorptiometry,CT or MRI were compared between groups,their correlations were analyzed,and the impact factors of Ob complicated with T2DM were explored.Results FBG,HbA1c and HOMA-IR in group A were all higher,while the total body fat mass percentage(TFM%)and leg fat mass percentage(LFM%)in group A were both lower than those in group B(all P＜0.05).Proton density fat fraction(PDFF)of liver and lumbar bone marrow in group A were both higher than those in group B(both P＜0.05).TFM%and LFM%in all 67 Ob patients were negatively correlated with FBG or HbA1c,while TFM%and Android region fat mass percentage(Android FM%)were both negatively correlated with HOMA-IR(r=-0.447—-0.263,all P＜0.05).For all 67 Ob patients,the area of visceral adipose tissue(VAT)was positively correlated with HOMA-IR(r=0.339,P=0.006),liver PDFF was positively correlated with FBG,HbA1c and HOMA-IR,and PDFF of lumbar bone marrow was positively correlated with FBG(r=0.323-0.599,all P＜0.05).Elevated LFM%was a protective factor,while elevated PDFF of liver and pancreas were both risk factors of Ob complicated with T2DM(all P＜0.05).Conclusion LFM%and liver PDFF were both impact factors of Ob complicated with T2DM.

In order to characterize the characteristics of pathological tremor of human upper limb, a simulation system of pathological tremor of human arm was provided and its dynamic response was analyzed. Firstly, in this study, a two-degree-of-freedom human arm dynamic model was established and linearized according to the arbitrary initial angle of joints. After solving the analytical solutions of steady-state responses of the joints, the numerical solution was used to verify it. The results of theoretical analysis show that the two natural frequencies of the developed dynamic model are 2.9 Hz and 5.4 Hz, respectively, which meet the characteristic frequency range of pathological tremors. Then, combined with the measured parameters of human arm, a tremor simulation system was built, and the measured results of joint responses are in good agreement with the theoretical and simulation analysis results, which verifies the effectiveness of the theoretical model. The results show that the human arm pathological tremor simulation system designed in this paper can characterize the frequency and response amplitude of the human upper limb pathological tremor. Moreover, the relevant research lays a theoretical foundation and experimental conditions for the subsequent development of wearable tremor suppression devices.
Humans ; Tremor/physiopathology* ; Computer Simulation ; Arm/physiopathology* ; Joints/physiopathology* ; Biomechanical Phenomena ; Upper Extremity/physiopathology* ; Models, Biological

Obesity increases the risk of numerous chronic diseases,and differentiating metabolically healthy or unhealthy obesity is crucial for understanding the complexity of obesity.With the application of various imaging techniques and artificial intelligence(AI),analysis of body composition became more precise.The progresses in imaging accurate evaluation on body composition characteristics for different obesity metabolic phenotype were reviewed in this article.

Objective To observe the impact factors of obesity(Ob)complicated with type 2 diabetes mellitus(T2DM).Methods Twenty Ob patients complicated with T2DM(group A)and 47 simple Ob patients(group B)were retrospectively enrolled.The blood glucose related indicators,including fasting blood glucose(FBG),fasting insulin(FINS)and glycosylated hemoglobin(HbA1c),homeostasis model assessment of insulin resistance(HOMA-IR),as well as fat quantitative parameters measured with dual-energy X-ray absorptiometry,CT or MRI were compared between groups,their correlations were analyzed,and the impact factors of Ob complicated with T2DM were explored.Results FBG,HbA1c and HOMA-IR in group A were all higher,while the total body fat mass percentage(TFM%)and leg fat mass percentage(LFM%)in group A were both lower than those in group B(all P＜0.05).Proton density fat fraction(PDFF)of liver and lumbar bone marrow in group A were both higher than those in group B(both P＜0.05).TFM%and LFM%in all 67 Ob patients were negatively correlated with FBG or HbA1c,while TFM%and Android region fat mass percentage(Android FM%)were both negatively correlated with HOMA-IR(r=-0.447—-0.263,all P＜0.05).For all 67 Ob patients,the area of visceral adipose tissue(VAT)was positively correlated with HOMA-IR(r=0.339,P=0.006),liver PDFF was positively correlated with FBG,HbA1c and HOMA-IR,and PDFF of lumbar bone marrow was positively correlated with FBG(r=0.323-0.599,all P＜0.05).Elevated LFM%was a protective factor,while elevated PDFF of liver and pancreas were both risk factors of Ob complicated with T2DM(all P＜0.05).Conclusion LFM%and liver PDFF were both impact factors of Ob complicated with T2DM.

Obesity increases the risk of numerous chronic diseases,and differentiating metabolically healthy or unhealthy obesity is crucial for understanding the complexity of obesity.With the application of various imaging techniques and artificial intelligence(AI),analysis of body composition became more precise.The progresses in imaging accurate evaluation on body composition characteristics for different obesity metabolic phenotype were reviewed in this article.

Pyroptosis,an inflammatory caspase-dependent programmed cell death,plays a vital role in maintaining tissue homeostasis and activating inflammatory responses.Orthodontic tooth movement(OTM)is an aseptic force-induced inflammatory bone remodeling process mediated by the activation of periodontal ligament(PDL)progenitor cells.However,whether and how force induces PDL progenitor cell pyroptosis,thereby influencing OTM and alveolar bone remodeling remains unknown.In this study,we found that mechanical force induced the expression of pyroptosis-related markers in rat OTM and alveolar bone remodeling process.Blocking or enhancing pyroptosis level could suppress or promote OTM and alveolar bone remodeling respectively.Using Caspase-1-/-mice,we further demonstrated that the functional role of the force-induced pyroptosis in PDL progenitor cells depended on Caspase-1.Moreover,mechanical force could also induce pyroptosis in human ex-vivo force-treated PDL progenitor cells and in compressive force-loaded PDL progenitor cells in vitro,which influenced osteoclastogenesis.Mechanistically,transient receptor potential subfamily V member 4 signaling was involved in force-induced Caspase-1-dependent pyroptosis in PDL progenitor cells.Overall,this study suggested a novel mechanism contributing to the modulation of osteoclastogenesis and alveolar bone remodeling under mechanical stimuli,indicating a promising approach to accelerate OTM by targeting Caspase-1.

Pyroptosis,an inflammatory caspase-dependent programmed cell death,plays a vital role in maintaining tissue homeostasis and activating inflammatory responses.Orthodontic tooth movement(OTM)is an aseptic force-induced inflammatory bone remodeling process mediated by the activation of periodontal ligament(PDL)progenitor cells.However,whether and how force induces PDL progenitor cell pyroptosis,thereby influencing OTM and alveolar bone remodeling remains unknown.In this study,we found that mechanical force induced the expression of pyroptosis-related markers in rat OTM and alveolar bone remodeling process.Blocking or enhancing pyroptosis level could suppress or promote OTM and alveolar bone remodeling respectively.Using Caspase-1-/-mice,we further demonstrated that the functional role of the force-induced pyroptosis in PDL progenitor cells depended on Caspase-1.Moreover,mechanical force could also induce pyroptosis in human ex-vivo force-treated PDL progenitor cells and in compressive force-loaded PDL progenitor cells in vitro,which influenced osteoclastogenesis.Mechanistically,transient receptor potential subfamily V member 4 signaling was involved in force-induced Caspase-1-dependent pyroptosis in PDL progenitor cells.Overall,this study suggested a novel mechanism contributing to the modulation of osteoclastogenesis and alveolar bone remodeling under mechanical stimuli,indicating a promising approach to accelerate OTM by targeting Caspase-1.

Pyroptosis,an inflammatory caspase-dependent programmed cell death,plays a vital role in maintaining tissue homeostasis and activating inflammatory responses.Orthodontic tooth movement(OTM)is an aseptic force-induced inflammatory bone remodeling process mediated by the activation of periodontal ligament(PDL)progenitor cells.However,whether and how force induces PDL progenitor cell pyroptosis,thereby influencing OTM and alveolar bone remodeling remains unknown.In this study,we found that mechanical force induced the expression of pyroptosis-related markers in rat OTM and alveolar bone remodeling process.Blocking or enhancing pyroptosis level could suppress or promote OTM and alveolar bone remodeling respectively.Using Caspase-1-/-mice,we further demonstrated that the functional role of the force-induced pyroptosis in PDL progenitor cells depended on Caspase-1.Moreover,mechanical force could also induce pyroptosis in human ex-vivo force-treated PDL progenitor cells and in compressive force-loaded PDL progenitor cells in vitro,which influenced osteoclastogenesis.Mechanistically,transient receptor potential subfamily V member 4 signaling was involved in force-induced Caspase-1-dependent pyroptosis in PDL progenitor cells.Overall,this study suggested a novel mechanism contributing to the modulation of osteoclastogenesis and alveolar bone remodeling under mechanical stimuli,indicating a promising approach to accelerate OTM by targeting Caspase-1.

Pyroptosis,an inflammatory caspase-dependent programmed cell death,plays a vital role in maintaining tissue homeostasis and activating inflammatory responses.Orthodontic tooth movement(OTM)is an aseptic force-induced inflammatory bone remodeling process mediated by the activation of periodontal ligament(PDL)progenitor cells.However,whether and how force induces PDL progenitor cell pyroptosis,thereby influencing OTM and alveolar bone remodeling remains unknown.In this study,we found that mechanical force induced the expression of pyroptosis-related markers in rat OTM and alveolar bone remodeling process.Blocking or enhancing pyroptosis level could suppress or promote OTM and alveolar bone remodeling respectively.Using Caspase-1-/-mice,we further demonstrated that the functional role of the force-induced pyroptosis in PDL progenitor cells depended on Caspase-1.Moreover,mechanical force could also induce pyroptosis in human ex-vivo force-treated PDL progenitor cells and in compressive force-loaded PDL progenitor cells in vitro,which influenced osteoclastogenesis.Mechanistically,transient receptor potential subfamily V member 4 signaling was involved in force-induced Caspase-1-dependent pyroptosis in PDL progenitor cells.Overall,this study suggested a novel mechanism contributing to the modulation of osteoclastogenesis and alveolar bone remodeling under mechanical stimuli,indicating a promising approach to accelerate OTM by targeting Caspase-1.

Pyroptosis,an inflammatory caspase-dependent programmed cell death,plays a vital role in maintaining tissue homeostasis and activating inflammatory responses.Orthodontic tooth movement(OTM)is an aseptic force-induced inflammatory bone remodeling process mediated by the activation of periodontal ligament(PDL)progenitor cells.However,whether and how force induces PDL progenitor cell pyroptosis,thereby influencing OTM and alveolar bone remodeling remains unknown.In this study,we found that mechanical force induced the expression of pyroptosis-related markers in rat OTM and alveolar bone remodeling process.Blocking or enhancing pyroptosis level could suppress or promote OTM and alveolar bone remodeling respectively.Using Caspase-1-/-mice,we further demonstrated that the functional role of the force-induced pyroptosis in PDL progenitor cells depended on Caspase-1.Moreover,mechanical force could also induce pyroptosis in human ex-vivo force-treated PDL progenitor cells and in compressive force-loaded PDL progenitor cells in vitro,which influenced osteoclastogenesis.Mechanistically,transient receptor potential subfamily V member 4 signaling was involved in force-induced Caspase-1-dependent pyroptosis in PDL progenitor cells.Overall,this study suggested a novel mechanism contributing to the modulation of osteoclastogenesis and alveolar bone remodeling under mechanical stimuli,indicating a promising approach to accelerate OTM by targeting Caspase-1.