Background: Idiopathic pulmonary fibrosis (IPF) is a chronic, progressive lung disease that culminates in respiratory failure and death due to irreversible scarring of the distal lung. While initially considered a chronic inflammatory disorder, the aberrant function of the alveolar epithelium is now acknowledged as playing a central role in the pathophysiology of IPF. This study aimed to investigate the regenerative capacity of alveolar type 2 (AT2) cells using IPF-derived alveolar organoids and to examine the effects of disease progression on this capacity. Methods: Lung tissues from three pneumothorax patients and six IPF patients (early and advanced stages) were obtained through video-assisted thoracoscopic surgery and lung transplantation. HTII-280+ cells were isolated from CD31-CD45-epithelial cell adhesion molecule (EpCAM)+ cells in the distal lungs of IPF and pneumothorax patients using fluorescence-activated cell sorting (FACS) and resuspended in 48-well plates to establish IPF-derived alveolar organoids. Immunostaining was used to verify the presence of AT2 cells. Results: FACS sorting yielded approximately 1% of AT2 cells in early IPF tissue, and the number decreased as the disease progressed, in contrast to 2.7% in pneumothorax. Additionally, the cultured organoids in the IPF groups were smaller and less numerous compared to those from pneumothorax patients. The colony forming efficiency decreased as the disease advanced. Immunostaining results showed that the IPF organoids expressed less surfactant protein C (SFTPC) compared to the pneumothorax group and contained keratin 5+ (KRT5+) cells. Conclusion This study confirmed that the regenerative capacity of AT2 cells in IPF decreases as the disease progresses, with IPF-derived AT2 cells inherently exhibiting functional abnormalities and altered differentiation plasticity.

Background: Idiopathic pulmonary fibrosis (IPF) is a chronic, progressive lung disease that culminates in respiratory failure and death due to irreversible scarring of the distal lung. While initially considered a chronic inflammatory disorder, the aberrant function of the alveolar epithelium is now acknowledged as playing a central role in the pathophysiology of IPF. This study aimed to investigate the regenerative capacity of alveolar type 2 (AT2) cells using IPF-derived alveolar organoids and to examine the effects of disease progression on this capacity. Methods: Lung tissues from three pneumothorax patients and six IPF patients (early and advanced stages) were obtained through video-assisted thoracoscopic surgery and lung transplantation. HTII-280+ cells were isolated from CD31-CD45-epithelial cell adhesion molecule (EpCAM)+ cells in the distal lungs of IPF and pneumothorax patients using fluorescence-activated cell sorting (FACS) and resuspended in 48-well plates to establish IPF-derived alveolar organoids. Immunostaining was used to verify the presence of AT2 cells. Results: FACS sorting yielded approximately 1% of AT2 cells in early IPF tissue, and the number decreased as the disease progressed, in contrast to 2.7% in pneumothorax. Additionally, the cultured organoids in the IPF groups were smaller and less numerous compared to those from pneumothorax patients. The colony forming efficiency decreased as the disease advanced. Immunostaining results showed that the IPF organoids expressed less surfactant protein C (SFTPC) compared to the pneumothorax group and contained keratin 5+ (KRT5+) cells. Conclusion This study confirmed that the regenerative capacity of AT2 cells in IPF decreases as the disease progresses, with IPF-derived AT2 cells inherently exhibiting functional abnormalities and altered differentiation plasticity.

Background: Idiopathic pulmonary fibrosis (IPF) is a chronic, progressive lung disease that culminates in respiratory failure and death due to irreversible scarring of the distal lung. While initially considered a chronic inflammatory disorder, the aberrant function of the alveolar epithelium is now acknowledged as playing a central role in the pathophysiology of IPF. This study aimed to investigate the regenerative capacity of alveolar type 2 (AT2) cells using IPF-derived alveolar organoids and to examine the effects of disease progression on this capacity. Methods: Lung tissues from three pneumothorax patients and six IPF patients (early and advanced stages) were obtained through video-assisted thoracoscopic surgery and lung transplantation. HTII-280+ cells were isolated from CD31-CD45-epithelial cell adhesion molecule (EpCAM)+ cells in the distal lungs of IPF and pneumothorax patients using fluorescence-activated cell sorting (FACS) and resuspended in 48-well plates to establish IPF-derived alveolar organoids. Immunostaining was used to verify the presence of AT2 cells. Results: FACS sorting yielded approximately 1% of AT2 cells in early IPF tissue, and the number decreased as the disease progressed, in contrast to 2.7% in pneumothorax. Additionally, the cultured organoids in the IPF groups were smaller and less numerous compared to those from pneumothorax patients. The colony forming efficiency decreased as the disease advanced. Immunostaining results showed that the IPF organoids expressed less surfactant protein C (SFTPC) compared to the pneumothorax group and contained keratin 5+ (KRT5+) cells. Conclusion This study confirmed that the regenerative capacity of AT2 cells in IPF decreases as the disease progresses, with IPF-derived AT2 cells inherently exhibiting functional abnormalities and altered differentiation plasticity.

Background: Idiopathic pulmonary fibrosis (IPF) is a chronic, progressive lung disease that culminates in respiratory failure and death due to irreversible scarring of the distal lung. While initially considered a chronic inflammatory disorder, the aberrant function of the alveolar epithelium is now acknowledged as playing a central role in the pathophysiology of IPF. This study aimed to investigate the regenerative capacity of alveolar type 2 (AT2) cells using IPF-derived alveolar organoids and to examine the effects of disease progression on this capacity. Methods: Lung tissues from three pneumothorax patients and six IPF patients (early and advanced stages) were obtained through video-assisted thoracoscopic surgery and lung transplantation. HTII-280+ cells were isolated from CD31-CD45-epithelial cell adhesion molecule (EpCAM)+ cells in the distal lungs of IPF and pneumothorax patients using fluorescence-activated cell sorting (FACS) and resuspended in 48-well plates to establish IPF-derived alveolar organoids. Immunostaining was used to verify the presence of AT2 cells. Results: FACS sorting yielded approximately 1% of AT2 cells in early IPF tissue, and the number decreased as the disease progressed, in contrast to 2.7% in pneumothorax. Additionally, the cultured organoids in the IPF groups were smaller and less numerous compared to those from pneumothorax patients. The colony forming efficiency decreased as the disease advanced. Immunostaining results showed that the IPF organoids expressed less surfactant protein C (SFTPC) compared to the pneumothorax group and contained keratin 5+ (KRT5+) cells. Conclusion This study confirmed that the regenerative capacity of AT2 cells in IPF decreases as the disease progresses, with IPF-derived AT2 cells inherently exhibiting functional abnormalities and altered differentiation plasticity.

Background: Idiopathic pulmonary fibrosis (IPF) is a chronic, progressive lung disease that culminates in respiratory failure and death due to irreversible scarring of the distal lung. While initially considered a chronic inflammatory disorder, the aberrant function of the alveolar epithelium is now acknowledged as playing a central role in the pathophysiology of IPF. This study aimed to investigate the regenerative capacity of alveolar type 2 (AT2) cells using IPF-derived alveolar organoids and to examine the effects of disease progression on this capacity. Methods: Lung tissues from three pneumothorax patients and six IPF patients (early and advanced stages) were obtained through video-assisted thoracoscopic surgery and lung transplantation. HTII-280+ cells were isolated from CD31-CD45-epithelial cell adhesion molecule (EpCAM)+ cells in the distal lungs of IPF and pneumothorax patients using fluorescence-activated cell sorting (FACS) and resuspended in 48-well plates to establish IPF-derived alveolar organoids. Immunostaining was used to verify the presence of AT2 cells. Results: FACS sorting yielded approximately 1% of AT2 cells in early IPF tissue, and the number decreased as the disease progressed, in contrast to 2.7% in pneumothorax. Additionally, the cultured organoids in the IPF groups were smaller and less numerous compared to those from pneumothorax patients. The colony forming efficiency decreased as the disease advanced. Immunostaining results showed that the IPF organoids expressed less surfactant protein C (SFTPC) compared to the pneumothorax group and contained keratin 5+ (KRT5+) cells. Conclusion This study confirmed that the regenerative capacity of AT2 cells in IPF decreases as the disease progresses, with IPF-derived AT2 cells inherently exhibiting functional abnormalities and altered differentiation plasticity.

Background: Phentermine-topiramate (PT) and naltrexone-bupropion (NB) are widely used combination treatments for obesity and overweight. However, no study has yet compared the efficacy and safety of the two drugs in patients with comorbid psychiatric disorders. Methods: A retrospective chart review of patients who were prescribed with the PT and NB combination treatments was conducted from January 1, 2017, to August 31, 2023. To compare the treatment efficacy, the mean body mass index change rates of both drugs before and after drug use were calculated. The safety of the drug was compared by identifying whether the drug was discontinued early and any side effects that occurred. Results A total of 55 patients were enrolled, most of whom were women (89.1%), and the most commonly diagnosed psychiatric disorder was depressive disorder (37.5% for NB and 40.0% for PT). No demographic differences were observed between the patients using the two drugs. The two drugs showed no statistically significant difference in the treatment efficacy. However, in terms of safety, PT had a lower incidence of adverse effects than NB (6.7% vs.40.0%, p=0.022) Conclusion: No significant difference in the treatment efficacy between PT and NB was observed, but PT showed a more favorable safety profile in psychiatric patients. Further large-scale multicenter studies are needed to confirm these findings.

Background: Phentermine-topiramate (PT) and naltrexone-bupropion (NB) are widely used combination treatments for obesity and overweight. However, no study has yet compared the efficacy and safety of the two drugs in patients with comorbid psychiatric disorders. Methods: A retrospective chart review of patients who were prescribed with the PT and NB combination treatments was conducted from January 1, 2017, to August 31, 2023. To compare the treatment efficacy, the mean body mass index change rates of both drugs before and after drug use were calculated. The safety of the drug was compared by identifying whether the drug was discontinued early and any side effects that occurred. Results A total of 55 patients were enrolled, most of whom were women (89.1%), and the most commonly diagnosed psychiatric disorder was depressive disorder (37.5% for NB and 40.0% for PT). No demographic differences were observed between the patients using the two drugs. The two drugs showed no statistically significant difference in the treatment efficacy. However, in terms of safety, PT had a lower incidence of adverse effects than NB (6.7% vs.40.0%, p=0.022) Conclusion: No significant difference in the treatment efficacy between PT and NB was observed, but PT showed a more favorable safety profile in psychiatric patients. Further large-scale multicenter studies are needed to confirm these findings.

The Korean Society of Infectious Diseases has been regularly developing guidelines for adult immunization since 2007. In 2023, the guidelines for the following seven vaccines were revised: influenza, herpes zoster, pneumococcal, tetanus-diphtheria-pertussis (Tdap), human papillomavirus (HPV), meningococcal, and rabies vaccines. For the influenza vaccine, a recommendation for enhanced vaccines for the elderly was added. For the herpes zoster vaccine, a recommendation for the recombinant zoster vaccine was added. For the pneumococcal vaccine, the current status of the 15-valent pneumococcal conjugate vaccine and 20-valent PCV was described. For the Tdap vaccine, the possibility of using Tdap instead of tetanus-diphtheria vaccine was described. For the HPV vaccine, the expansion of the eligible age for vaccination was described. For the meningococcal vaccine, a recommendation for the meningococcal B vaccine was added. For the rabies vaccine, the number of pre-exposure prophylaxis doses was changed. This manuscript documents the summary and rationale of the revisions for the seven vaccines. For the vaccines not mentioned in this manuscript, the recommendations in the 3rd edition of the Vaccinations for Adults textbook shall remain in effect.

Background: Phentermine-topiramate (PT) and naltrexone-bupropion (NB) are widely used combination treatments for obesity and overweight. However, no study has yet compared the efficacy and safety of the two drugs in patients with comorbid psychiatric disorders. Methods: A retrospective chart review of patients who were prescribed with the PT and NB combination treatments was conducted from January 1, 2017, to August 31, 2023. To compare the treatment efficacy, the mean body mass index change rates of both drugs before and after drug use were calculated. The safety of the drug was compared by identifying whether the drug was discontinued early and any side effects that occurred. Results A total of 55 patients were enrolled, most of whom were women (89.1%), and the most commonly diagnosed psychiatric disorder was depressive disorder (37.5% for NB and 40.0% for PT). No demographic differences were observed between the patients using the two drugs. The two drugs showed no statistically significant difference in the treatment efficacy. However, in terms of safety, PT had a lower incidence of adverse effects than NB (6.7% vs.40.0%, p=0.022) Conclusion: No significant difference in the treatment efficacy between PT and NB was observed, but PT showed a more favorable safety profile in psychiatric patients. Further large-scale multicenter studies are needed to confirm these findings.

Background: Phentermine-topiramate (PT) and naltrexone-bupropion (NB) are widely used combination treatments for obesity and overweight. However, no study has yet compared the efficacy and safety of the two drugs in patients with comorbid psychiatric disorders. Methods: A retrospective chart review of patients who were prescribed with the PT and NB combination treatments was conducted from January 1, 2017, to August 31, 2023. To compare the treatment efficacy, the mean body mass index change rates of both drugs before and after drug use were calculated. The safety of the drug was compared by identifying whether the drug was discontinued early and any side effects that occurred. Results A total of 55 patients were enrolled, most of whom were women (89.1%), and the most commonly diagnosed psychiatric disorder was depressive disorder (37.5% for NB and 40.0% for PT). No demographic differences were observed between the patients using the two drugs. The two drugs showed no statistically significant difference in the treatment efficacy. However, in terms of safety, PT had a lower incidence of adverse effects than NB (6.7% vs.40.0%, p=0.022) Conclusion: No significant difference in the treatment efficacy between PT and NB was observed, but PT showed a more favorable safety profile in psychiatric patients. Further large-scale multicenter studies are needed to confirm these findings.