1.Lymphoid Lineage γδ T Cells Were Successfully Generated from Human Pluripotent Stem Cells via Hemogenic Endothelium
Soo-Been JEON ; A-Reum HAN ; Yoo Bin CHOI ; Ah Reum LEE ; Ji Yoon LEE
International Journal of Stem Cells 2023;16(1):108-116
γδ T cells are a rare and unique prototype of T cells that share properties with natural killer cells in secondary lymphoid organs. Although many studies have revealed the function and importance of adult-derived γδ T cells in cancer biology and regenerative medicine, the low numbers of these cells hamper their application as therapeutic cell sources in the clinic. To solve this problem, pluripotent stem cell-derived γδ T cells are considered alternative cell sources; however, few studies have reported the generation of human pluripotent stem cell-derived γδ T cells. In the present study, we investigated whether lymphoid lineage γδ T cells were successfully generated from human pluripotent stem cells via hemogenic endothelium under defined culture conditions. Our results revealed that pluripotent stem cells successfully generated γδ T cells with an overall increase in transcriptional activity of lymphoid lineage genes and cytolytic factors, indicating the importance of the optimization of culture conditions in generating lymphoid lineage γδ T cells. We uncovered an initial step in differentiating γδ T cells that could be applied to basic and translational investigations in the field of cancer biology. Based on our result, we will develop an appropriate method to purify γδ T cells with functionality and it helpful for the study of basic mechanism of γδ T cells in pathophysiologic condition as well as clinic application.
2.Duration of and fee for comprehensive assessment and care planning for patients with hypertension and/or diabetes in primary care.
Jeehye LEE ; Yong Jun CHOI ; Ah Reum AN ; Yoon KIM
Journal of the Korean Medical Association 2017;60(1):72-80
The enhanced primary care demonstration (EPD) was launched in November 2014 to provide high-quality care for people with chronic illnesses. In the EPD, comprehensive assessment and care planning (CAP) is a critical component, along with behavior modification and case management services. In this study, we measured CAP duration and calculated the fee for CAP sessions performed with patients with hypertension and/or diabetes mellitus. In 5 primary care clinics participating in the EPD, the duration of CAP sessions and usual consultations was measured. The duration of CAP sessions was measured on 2 separate occasions because CAP involves 2 separate consultations, including an initial consultation for comprehensive patient assessment and laboratory testing and a follow-up consultation for creating a care plan based on the assessment and test results. The CAP fee was calculated as the ratio of CAP time to the usual consultation time. The median (interquartile range) and the mean ± standard deviation of CAP duration were 15.4 (7.1) minutes and 15.6 ± 4.2 minutes, respectively. The first and second CAP sessions lasted for 5.3 and 4.6 times longer than usual consultations, respectively. The calculated CAP fees were 76,299 won (median) and 65,766 won (mean). The length of CAP sessions for patients with hypertension and/or diabetes mellitus was approximately 5 times longer than that of usual consultations. If consultation lengths were measured in a representative patient sample, it would be possible to improve the external validity of the measurements.
Behavior Therapy
;
Case Management
;
Chronic Disease
;
Diabetes Mellitus
;
Diagnosis
;
Fees and Charges*
;
Fees, Medical
;
Follow-Up Studies
;
Humans
;
Hypertension*
;
Patient Care Planning
;
Primary Health Care*
;
Referral and Consultation
3.Duration of and fee for comprehensive assessment and care planning for patients with hypertension and/or diabetes in primary care.
Jeehye LEE ; Yong Jun CHOI ; Ah Reum AN ; Yoon KIM
Journal of the Korean Medical Association 2017;60(1):72-80
The enhanced primary care demonstration (EPD) was launched in November 2014 to provide high-quality care for people with chronic illnesses. In the EPD, comprehensive assessment and care planning (CAP) is a critical component, along with behavior modification and case management services. In this study, we measured CAP duration and calculated the fee for CAP sessions performed with patients with hypertension and/or diabetes mellitus. In 5 primary care clinics participating in the EPD, the duration of CAP sessions and usual consultations was measured. The duration of CAP sessions was measured on 2 separate occasions because CAP involves 2 separate consultations, including an initial consultation for comprehensive patient assessment and laboratory testing and a follow-up consultation for creating a care plan based on the assessment and test results. The CAP fee was calculated as the ratio of CAP time to the usual consultation time. The median (interquartile range) and the mean ± standard deviation of CAP duration were 15.4 (7.1) minutes and 15.6 ± 4.2 minutes, respectively. The first and second CAP sessions lasted for 5.3 and 4.6 times longer than usual consultations, respectively. The calculated CAP fees were 76,299 won (median) and 65,766 won (mean). The length of CAP sessions for patients with hypertension and/or diabetes mellitus was approximately 5 times longer than that of usual consultations. If consultation lengths were measured in a representative patient sample, it would be possible to improve the external validity of the measurements.
Behavior Therapy
;
Case Management
;
Chronic Disease
;
Diabetes Mellitus
;
Diagnosis
;
Fees and Charges*
;
Fees, Medical
;
Follow-Up Studies
;
Humans
;
Hypertension*
;
Patient Care Planning
;
Primary Health Care*
;
Referral and Consultation
4.Accidental intrathecal injection of dopamine hydrochloride resulting in analgesic effects.
Jeong Min HONG ; Ah Reum CHO ; Sun A CHOI
Korean Journal of Anesthesiology 2014;67(Suppl):S49-S50
No abstract available.
Dopamine*
;
Injections, Spinal*
5.Accidental intrathecal injection of dopamine hydrochloride resulting in analgesic effects.
Jeong Min HONG ; Ah Reum CHO ; Sun A CHOI
Korean Journal of Anesthesiology 2014;67(Suppl):S49-S50
No abstract available.
Dopamine*
;
Injections, Spinal*
6.Exercise Strategies to Prevent Hypoglycemia in Patients with Diabetes
Ah Reum JUNG ; Hyunah KIM ; Hun-Sung KIM ; Churlmin KIM ; Whan-Seok CHOI
Korean Journal of Family Medicine 2021;42(2):91-95
The importance of adopting healthy exercise routines has been repeatedly emphasized to individuals with diabetes mellitus (DM). However, knowledge about the risk of exercise-induced hypoglycemia is limited. Regular exercise reduces and delays the onset of DM-related complications particularly in individuals who already have DM. However, an excessive exercise can lead to hypoglycemia. Excessive exercise in the evening can cause hypoglycemia while sleeping. Furthermore, if individuals with DM want to have a greater amount of exercise, the exercise duration rather than intensity must be increased. In weight resistance exercises, it is beneficial to first increase the number of repetitions, followed by the number of sets and gradually the weight of resistance. When performing intermittent high-intensity training within a short time period, hypoglycemia may develop for an extended period after exercise. In addition to adjusting exercise regimens, the medication doses must be modified accordingly. Delaying exercise, adjusting the number of snacks consumed prior to exercise, reducing insulin dose before exercise, and injecting insulin into the abdomen rather than the limbs prevent exercise-induced hypoglycemia prior to a spontaneous exercise. Ultimately, with personal knowledge on how to prevent hypoglycemia, the effects of exercise can be maximized in individuals with DM, and a healthy lifestyle can prevent future complications.
7.Exercise Strategies to Prevent Hypoglycemia in Patients with Diabetes
Ah Reum JUNG ; Hyunah KIM ; Hun-Sung KIM ; Churlmin KIM ; Whan-Seok CHOI
Korean Journal of Family Medicine 2021;42(2):91-95
The importance of adopting healthy exercise routines has been repeatedly emphasized to individuals with diabetes mellitus (DM). However, knowledge about the risk of exercise-induced hypoglycemia is limited. Regular exercise reduces and delays the onset of DM-related complications particularly in individuals who already have DM. However, an excessive exercise can lead to hypoglycemia. Excessive exercise in the evening can cause hypoglycemia while sleeping. Furthermore, if individuals with DM want to have a greater amount of exercise, the exercise duration rather than intensity must be increased. In weight resistance exercises, it is beneficial to first increase the number of repetitions, followed by the number of sets and gradually the weight of resistance. When performing intermittent high-intensity training within a short time period, hypoglycemia may develop for an extended period after exercise. In addition to adjusting exercise regimens, the medication doses must be modified accordingly. Delaying exercise, adjusting the number of snacks consumed prior to exercise, reducing insulin dose before exercise, and injecting insulin into the abdomen rather than the limbs prevent exercise-induced hypoglycemia prior to a spontaneous exercise. Ultimately, with personal knowledge on how to prevent hypoglycemia, the effects of exercise can be maximized in individuals with DM, and a healthy lifestyle can prevent future complications.
8.Three Cases of Osteomalacia with Fractures Induced by Adefovir in Chronic Hepatitis B
Ah Reum KIM ; Yong Jun CHOI ; Yoon Sok CHUNG
Journal of Korean Society of Osteoporosis 2015;13(2):109-116
Adefovir dipivoxil is used antiviral agent in the treatment of chronic hepatitis B virus infection. This drug is recommended for patients infected with lamivudine-refractory hepatitis B. Many studies of low-dose adefovir have shown little evidence of renal tubular dysfunction. However, hypophosphatemic osteomalacia has recently been reported in patients treated with adefovir. We report three cases of low dose adefovir-induced hypophosphatemic osteomalacia with fractures. All three patients had been receiving adefovir due to lamivudine-refractory hepatitis B, presented multiple bone pain. The laboratory tests revealed hypophosphatemia and phosphaturia. Bone scintigraphy showed increased uptake in multiple lesions. They were diagnosed as adefovir induced hypophophatemic osteomalacia. Changing the antiviral agent and administration of calcitriol and phosphates improved hypophosphatemia and clinical symptoms. Patients with hepatitis B virus treated with adefovir should be monitored with the serum phosphate levels and presenting symptoms of diffuse bone pain, clinicians need to suspect this infrequent complication.
Calcitriol
;
Hepatitis B
;
Hepatitis B virus
;
Hepatitis B, Chronic
;
Hepatitis, Chronic
;
Humans
;
Hypophosphatemia
;
Hypophosphatemia, Familial
;
Osteomalacia
;
Phosphates
;
Radionuclide Imaging
9.A case of recurrent respiratory infection resulting from a congenital anomaly of the bronchial tree tracheal bronchus.
Ah Reum CHOI ; Sun Hee CHOI ; Seong Wan KIM ; Dong Wook SUNG ; Yeong Ho RHA
Korean Journal of Pediatrics 2008;51(6):660-664
The term tracheal bronchus refers to an abnormal bronchus that comes directly off of the lateral wall of the trachea (above the carina) and supplies ventilation to the upper lobe. Tracheal bronchi occur almost exclusively on the right trachea and are associated with other congenital anomalies. In addition, tracheai bronchus may be related to other inflammatory conditions with persistent wheezing, such as recurrent pneumonia, chronic bronchitis and bronchiectasis, which is a result of the relatively poor local drainage of the involved bronchi. An infant with recurrent wheezing is likely to be a challenge for a clinician in the evaluation of the etiology of airway obstruction and in the differential diagnosis of wheezy breathing. The authors report a case of an 8-month-old female infant with a ventricular septal defect, who presented with stridor and recurrent respiratory infection and finally was finally diagnosed with a tracheal bronchus using computed tomography and a bronchoscopy. Therefore, tracheal bronchus should be included in the differential diagnosis of any child who presents with chronic or recurrent respiratory tract symptoms such as coughing, wheezing, stridor and recurrent respiratory infection, particularly in children with other congenital deformities.
Airway Obstruction
;
Bronchi
;
Bronchiectasis
;
Bronchitis, Chronic
;
Bronchoscopy
;
Child
;
Congenital Abnormalities
;
Cough
;
Diagnosis, Differential
;
Drainage
;
Equipment and Supplies
;
Female
;
Heart Septal Defects, Ventricular
;
Humans
;
Infant
;
Pneumonia
;
Respiration
;
Respiratory Sounds
;
Respiratory System
;
Trachea
;
Ventilation
10.The Changes of Differences of Pulse Transit Time between Toe and Finger in General and Epidural Anesthesia.
Tae Kyun KIM ; Ah Reum CHO ; Byeong Cheol CHOI ; Seong Wan BAIK
Korean Journal of Anesthesiology 2007;53(1):21-26
BACKGROUND: Pulse wave velocity (PWV) and pulse transit time (PTT) are influenced by the arterial wall stiffness and compliance. Also, the PTT is dependent on blood pressure changes that can be accompanied by the anesthesia. The simply measured PTT has difficult to discriminate the arterial compliance changes from blood pressure changes. Therefore, we investigated that the differences of PTT between toe and finger as an independent parameter on blood pressure. METHODS: Eighteen patients scheduled for elective lower abdominal gynecologic surgery were studied. General anesthesia was achieved with sevoflurane and epidural block was done with 0.2% ropivacaine and fentanyl 100microgram via epidural catheter inserted into L1 - L2 epidural space. PTT was measured in a finger (PTTf) and a toe (PTTt) by the time difference between the ECG R wave and the pulse wave of PPG. Blood pressure and PTT was measured at three instances such as preinduction (Pre), 5 minutes after intubation (Int5) and 30 minutes after injection of epidural dose (Epi). The time delay of PTT between toe and finger (PTTt-f) was measured. RESULTS: PTTf and PTTt was prolonged at Int5 and Epi. But the PTTt-f was not different between the Int5 and Epi because of prolonged PTTf caused by the blood pressure decrement after the epidural block. CONCLUSIONS: PTTf, PTTt and PTTt-f can be a one of the convenient measurement of the arterial compliance but it was suggested that there need to be a parameter less dependent on the blood pressure changes.
Anesthesia
;
Anesthesia, Epidural*
;
Anesthesia, General
;
Blood Pressure
;
Catheters
;
Compliance
;
Electrocardiography
;
Epidural Space
;
Female
;
Fentanyl
;
Fingers*
;
Gynecologic Surgical Procedures
;
Humans
;
Intubation
;
Photoplethysmography
;
Pulse Wave Analysis*
;
Toes*