BACKGROUND: The contraction behaviors of cardiomyocytes (CMs), especially contraction synchrony, are crucial factors reflecting their maturity and response to drugs. A wider field of view helps to observe more pronounced synchrony differences, but the accompanied greater computational load, requiring more computing power or longer computational time. METHODS: We proposed a method that directly correlates variations in optical field brightness with cardiac tissue contraction status (CVB method), based on principles from physics and photometry, for rapid video analysis in wide field of view to obtain contraction parameters, such as period and contraction propagation direction and speed. RESULTS: Through video analysis of human induced pluripotent stem cell (hiPSC)-derived CMs labeled with green fluorescent protein (GFP) cultured on aligned and random nanofiber scaffolds, the CVB method was demonstrated to obtain contraction parameters and quantify the direction and speed of contraction within regions of interest (ROIs) in wide field of view. The CVB method required less computation time compared to one of the contour tracking methods, the LucasKanade (LK) optical flow method, and provided better stability and accuracy in the results. CONCLUSION This method has a smaller computational load, is less affected by motion blur and out-of-focus conditions, and provides a potential tool for accurate and rapid analysis of cardiac tissue contraction synchrony in wide field of view without the need for more powerful hardware.

BACKGROUND: The contraction behaviors of cardiomyocytes (CMs), especially contraction synchrony, are crucial factors reflecting their maturity and response to drugs. A wider field of view helps to observe more pronounced synchrony differences, but the accompanied greater computational load, requiring more computing power or longer computational time. METHODS: We proposed a method that directly correlates variations in optical field brightness with cardiac tissue contraction status (CVB method), based on principles from physics and photometry, for rapid video analysis in wide field of view to obtain contraction parameters, such as period and contraction propagation direction and speed. RESULTS: Through video analysis of human induced pluripotent stem cell (hiPSC)-derived CMs labeled with green fluorescent protein (GFP) cultured on aligned and random nanofiber scaffolds, the CVB method was demonstrated to obtain contraction parameters and quantify the direction and speed of contraction within regions of interest (ROIs) in wide field of view. The CVB method required less computation time compared to one of the contour tracking methods, the LucasKanade (LK) optical flow method, and provided better stability and accuracy in the results. CONCLUSION This method has a smaller computational load, is less affected by motion blur and out-of-focus conditions, and provides a potential tool for accurate and rapid analysis of cardiac tissue contraction synchrony in wide field of view without the need for more powerful hardware.

BACKGROUND: The contraction behaviors of cardiomyocytes (CMs), especially contraction synchrony, are crucial factors reflecting their maturity and response to drugs. A wider field of view helps to observe more pronounced synchrony differences, but the accompanied greater computational load, requiring more computing power or longer computational time. METHODS: We proposed a method that directly correlates variations in optical field brightness with cardiac tissue contraction status (CVB method), based on principles from physics and photometry, for rapid video analysis in wide field of view to obtain contraction parameters, such as period and contraction propagation direction and speed. RESULTS: Through video analysis of human induced pluripotent stem cell (hiPSC)-derived CMs labeled with green fluorescent protein (GFP) cultured on aligned and random nanofiber scaffolds, the CVB method was demonstrated to obtain contraction parameters and quantify the direction and speed of contraction within regions of interest (ROIs) in wide field of view. The CVB method required less computation time compared to one of the contour tracking methods, the LucasKanade (LK) optical flow method, and provided better stability and accuracy in the results. CONCLUSION This method has a smaller computational load, is less affected by motion blur and out-of-focus conditions, and provides a potential tool for accurate and rapid analysis of cardiac tissue contraction synchrony in wide field of view without the need for more powerful hardware.

BACKGROUND: The contraction behaviors of cardiomyocytes (CMs), especially contraction synchrony, are crucial factors reflecting their maturity and response to drugs. A wider field of view helps to observe more pronounced synchrony differences, but the accompanied greater computational load, requiring more computing power or longer computational time. METHODS: We proposed a method that directly correlates variations in optical field brightness with cardiac tissue contraction status (CVB method), based on principles from physics and photometry, for rapid video analysis in wide field of view to obtain contraction parameters, such as period and contraction propagation direction and speed. RESULTS: Through video analysis of human induced pluripotent stem cell (hiPSC)-derived CMs labeled with green fluorescent protein (GFP) cultured on aligned and random nanofiber scaffolds, the CVB method was demonstrated to obtain contraction parameters and quantify the direction and speed of contraction within regions of interest (ROIs) in wide field of view. The CVB method required less computation time compared to one of the contour tracking methods, the LucasKanade (LK) optical flow method, and provided better stability and accuracy in the results. CONCLUSION This method has a smaller computational load, is less affected by motion blur and out-of-focus conditions, and provides a potential tool for accurate and rapid analysis of cardiac tissue contraction synchrony in wide field of view without the need for more powerful hardware.

Objective:To compare the diagnostic efficacy of the added 99Tc m-methoxyisobutylisonitrile (MIBI) SPECT/CT imaging (tomography imaging) after early or delayed planar imaging in different types of hyperparathyroidism, and to seek for the optimal timing of preoperative imaging. Methods:A total of 339 patients (148 males, 191 females, age (52±13) years) with primary or secondary hyperparathyroidism and pathological results from January 2016 to June 2024 in the Second Affiliated Hospital of Soochow University were retrospectively analyzed. The patients were divided into primary early tomography imaging group ( n=63) and delayed tomography imaging group ( n=47), secondary early tomography imaging group ( n=89) and delayed tomography imaging group ( n=140). χ2 test was used to compare the diagnostic efficacies of early and delayed tomography imaging. Results:The difference of accuracy between primary delayed (98.40%(185/188)) and early tomography imaging (94.84%(239/252)) was statistically significant ( χ2=3.90, P=0.048). There were significant differences in sensitivity (77.29%(405/524) and 85.40%(275/322)), accuracy (75.89%(425/560) and 83.99%(299/356)) and negative predictive value (14.39%(20/139) and 33.80%(24/71)) between secondary delayed and early tomography imaging ( χ2 values: 8.33, 8.61, 10.70, all P<0.01). Conclusion:The optimal timing of preoperative 99Tc m-MIBI SPECT/CT imaging for primary and secondary hyperparathyroidism is after delayed planar imaging and after early planar imaging respectively.

Objective:To compare the diagnostic efficacy of the added 99Tc m-methoxyisobutylisonitrile (MIBI) SPECT/CT imaging (tomography imaging) after early or delayed planar imaging in different types of hyperparathyroidism, and to seek for the optimal timing of preoperative imaging. Methods:A total of 339 patients (148 males, 191 females, age (52±13) years) with primary or secondary hyperparathyroidism and pathological results from January 2016 to June 2024 in the Second Affiliated Hospital of Soochow University were retrospectively analyzed. The patients were divided into primary early tomography imaging group ( n=63) and delayed tomography imaging group ( n=47), secondary early tomography imaging group ( n=89) and delayed tomography imaging group ( n=140). χ2 test was used to compare the diagnostic efficacies of early and delayed tomography imaging. Results:The difference of accuracy between primary delayed (98.40%(185/188)) and early tomography imaging (94.84%(239/252)) was statistically significant ( χ2=3.90, P=0.048). There were significant differences in sensitivity (77.29%(405/524) and 85.40%(275/322)), accuracy (75.89%(425/560) and 83.99%(299/356)) and negative predictive value (14.39%(20/139) and 33.80%(24/71)) between secondary delayed and early tomography imaging ( χ2 values: 8.33, 8.61, 10.70, all P<0.01). Conclusion:The optimal timing of preoperative 99Tc m-MIBI SPECT/CT imaging for primary and secondary hyperparathyroidism is after delayed planar imaging and after early planar imaging respectively.

BACKGROUND: The contraction behaviors of cardiomyocytes (CMs), especially contraction synchrony, are crucial factors reflecting their maturity and response to drugs. A wider field of view helps to observe more pronounced synchrony differences, but the accompanied greater computational load, requiring more computing power or longer computational time. METHODS: We proposed a method that directly correlates variations in optical field brightness with cardiac tissue contraction status (CVB method), based on principles from physics and photometry, for rapid video analysis in wide field of view to obtain contraction parameters, such as period and contraction propagation direction and speed. RESULTS: Through video analysis of human induced pluripotent stem cell (hiPSC)-derived CMs labeled with green fluorescent protein (GFP) cultured on aligned and random nanofiber scaffolds, the CVB method was demonstrated to obtain contraction parameters and quantify the direction and speed of contraction within regions of interest (ROIs) in wide field of view. The CVB method required less computation time compared to one of the contour tracking methods, the LucasKanade (LK) optical flow method, and provided better stability and accuracy in the results. CONCLUSION This method has a smaller computational load, is less affected by motion blur and out-of-focus conditions, and provides a potential tool for accurate and rapid analysis of cardiac tissue contraction synchrony in wide field of view without the need for more powerful hardware.

Objective:To understand the clinical characteristics of hypophysitis due to nivolumab and provide reference for the safe use of nivolumab in clinic.Methods:Relevant databases at home and abroad (up to May 31, 2024) were searched and case reports of hypophysitis caused by nivolumab were collected. Relevant information of patients (gender, age, primary disease), single and combined use of nivolumab, occurrence of hypophysitis, causality evaluation, intervention measures and outcomes were extracted and analyzed descriptively and statistically.Results:A total of 56 case reports, 53 in English and 3 in Chinese, were enrolled in the analysis, involving 59 patients, with 40 males and 19 females. Their ages ranged from 26 to 84 years, with an average age of 61 years. The primary diseases were malignant melanoma in 20 cases, renal cell carcinoma in 19 cases, lung cancer in 11 cases, glossopharyngeal cancer in 4 cases, esophageal cancer in 2 cases, and gastric cancer, colon cancer and pleural mesothelioma in 1 case each. Among the 59 patients, 33 were treated with nivolumab monotherapy, 24 with nivolumab and ipilimumab, 1 with nivolumab and anlotinib and 1 with nivolumab and platinum. The average time of hypophysitis caused by nivolumab alone was 25.6 weeks after treatment, and that caused by the combination therapy was 9.9 weeks after treatment. The main clinical manifestations of hypophysitis caused by nivolumab were fatigue, anorexia, headache, and nausea. Among the 59 patients, 56 patients discontinued nivolumab and received glucocorticoid, 20 of whom resumed nivolumab treatment after improvement of clinical symptoms; 3 patients′ situation was not described clearly. The outcomes of the 59 patients were as follows. Four were recovered, 46 were relieved, 2 patients′ pituitary function was not recovered, 4 died, 1 developed secondary autoimmune vasculitis, 1 developed secondary autoimmune hepatitis, and it was unknown in one patient.Conclusions:The average occurrence time of hypophysitis caused by nivolumab monotherapy is longer than that caused by combination therapy. The main clinical manifestations are fatigue, anorexia, headache, etc. After timely discontinuation of medication and symptomatic treatments with glucocorticoid, most patients have a good prognosis, but it can lead to death in severe cases.

Objective:To understand the clinical characteristics of hypophysitis due to nivolumab and provide reference for the safe use of nivolumab in clinic.Methods:Relevant databases at home and abroad (up to May 31, 2024) were searched and case reports of hypophysitis caused by nivolumab were collected. Relevant information of patients (gender, age, primary disease), single and combined use of nivolumab, occurrence of hypophysitis, causality evaluation, intervention measures and outcomes were extracted and analyzed descriptively and statistically.Results:A total of 56 case reports, 53 in English and 3 in Chinese, were enrolled in the analysis, involving 59 patients, with 40 males and 19 females. Their ages ranged from 26 to 84 years, with an average age of 61 years. The primary diseases were malignant melanoma in 20 cases, renal cell carcinoma in 19 cases, lung cancer in 11 cases, glossopharyngeal cancer in 4 cases, esophageal cancer in 2 cases, and gastric cancer, colon cancer and pleural mesothelioma in 1 case each. Among the 59 patients, 33 were treated with nivolumab monotherapy, 24 with nivolumab and ipilimumab, 1 with nivolumab and anlotinib and 1 with nivolumab and platinum. The average time of hypophysitis caused by nivolumab alone was 25.6 weeks after treatment, and that caused by the combination therapy was 9.9 weeks after treatment. The main clinical manifestations of hypophysitis caused by nivolumab were fatigue, anorexia, headache, and nausea. Among the 59 patients, 56 patients discontinued nivolumab and received glucocorticoid, 20 of whom resumed nivolumab treatment after improvement of clinical symptoms; 3 patients′ situation was not described clearly. The outcomes of the 59 patients were as follows. Four were recovered, 46 were relieved, 2 patients′ pituitary function was not recovered, 4 died, 1 developed secondary autoimmune vasculitis, 1 developed secondary autoimmune hepatitis, and it was unknown in one patient.Conclusions:The average occurrence time of hypophysitis caused by nivolumab monotherapy is longer than that caused by combination therapy. The main clinical manifestations are fatigue, anorexia, headache, etc. After timely discontinuation of medication and symptomatic treatments with glucocorticoid, most patients have a good prognosis, but it can lead to death in severe cases.

Abstract: Objective　To investigate the effects of hyperbaric oxygen combined with ulinastatin on choline acetyltransferase (ChAT), malondialdehyde (MDA), and myocardial function in rats with acute organophosphorus pesticide poisoning. 　Methods　50 specific-pathogen-free (SPF) male SD rats were randomly divided into five groups of ten each: normal group (N), model group (M), hyperbaric oxygen group (H), and ulinastatin group (U), and hyperbaric oxygen combined ulinastatin (O) group. The model of acute organophosphorus pesticide poisoning was established in the M, H, U, and O groups via cumulative subcutaneous injections on the neck back, and the N group did not set up the model. After the success of the modeling, the H group was treated with hyperbaric oxygen therapy, and the U group was intraperitoneally injected with ulinastatin at a dose of 100 000 U/kg.The O group received a combination of hyperbaric oxygen and ulinastatin treatment, whereas the N and M groups were gavaged with an equivalent volume of saline. The rats' myocardial function was assessed through cardiac echocardiography, brain tissue pathology was examined using hematoxylin and eosin (HE) staining and Nissl staining, cardiomyocyte apoptosis was evaluated by TUNEL assay, and ChAT and acetylcholine (Ach) content in rat brain tissues were determined through histochemical methods. Serum levels of MDA and superoxide dismutase (SOD) were measured using the thiobarbituric acid reactive substances (TBARS) assay. Statistical analysis was performed by SPSS 22.0. Results　Compared with Group N, the left ventricular end systolic dimension (LVSD) and left ventricular end diastolic dimension (LVDD) in Group M were both enlarged, with increased interventricular septum (IVS) thickness, aggravated left ventricular strain (LVS), increased number of apoptotic cardiomyocytes, and elevated Ach and MDA levels (P<0.05). Additionally, the left ventricular ejection fraction (LVEF) decreased, while ChAT and SOD levels also decreased (P<0.05). When compared to Group M, both Groups H and U exhibited reduced LVSD and LVDD, thinner IVS, decreased LVS, and fewer apoptotic cardiomyocytes. Furthermore, Ach and MDA levels were lower (P<0.05), while LVEF, ChAT, and SOD levels were higher (P<0.05). No statistically significant difference was observed between Groups U and H (P>0.05), while Group O showed more pronounced changes compared to Group U (P<0.05). Rats in Group N exhibited normal brain tissue pathological morphology, while those in Group M suffered severe damage to brain tissue structure. Compared to Group M, significant improvements in symptoms were observed in Groups H, U, and O. Conclusions　Hyperbaric oxygen combined with ulinastatin has a significant effect on acute organophosphorus pesticide poisoning rats, which can significantly increase ChAT content, decrease MDA content, and effectively improve myocardial function.