In children and adolescents, inguinal and scrotal diseases are relatively common, and imaging is very useful for the diagnosis and differential diagnosis of these diseases. Therefore, it is important to understand the imaging findings of these diseases. In this article, we classify these diseases into small testes, cryptorchidism, patent processus vaginalis, acute scrotum pain, trauma, testicular tumors, and others and describe their characteristic findings.

The cyclic AMP receptor protein (CRP) complexed with cyclic AMP (CRP.cAMP) regulates expression of many genes by binding to sites at or near many promoters of Escherichia coli. The regulatory effect of CRP.cAMP was studied by in vitro transcription assay with lacUV5 promoter derivatives that have the CRP binding site at different locations (-56 to -69 from the transcription start site of lacUV5 promoter) upstream of the promoter. The CRP binding site itself influenced differently on the promoter activity depending on the distances from the promoter. Depending on the helix phasing of the CRP.cAMP relative to RNA polymerase CRP.cAMP activated, repressed or had no effect on the promoter. These results imply that a regulator is not a dedicated protein for repression or activation but that any regulator may have a potential of dual functionalities when it is under appropriate condition.
Binding Sites ; Cyclic AMP ; Cyclic AMP Receptor Protein ; DNA-Directed RNA Polymerases ; Escherichia coli* ; Escherichia* ; Repression, Psychology ; Transcription Initiation Site

BACKGROUND: Hydrofluoric acid_(HF) is widely used in many industrial and domestic settings such as etching glass, and polishing metals. HF is one of the most corrosive inorganic acids and can produce progressive and serious tissue necrosis with severe pain. Since HF chemical burns can be asymptomatic for the first few hours, it is crucial to understand its toxicity and the early use of antidote. CASE: A 37-year-old man presented with erythematous lesion and pain on his face, anterior neck, both forearms, both thighs, and left ankle after injury resulting from a chemical burn caused by HF. He showed normal vital signs and dyspnea, but complained of a sore throat. Liquid form of HF had splashed on his face and anterior neck first and run down his forearms and thighs while working at HF supply tanks. Some of the HF was splashed into his mouth. He immediately removed his clothes and showered with abundant water. A 4.5% calcium gluconate jel was applied to the involved area. He was given subcutaneous injection of 10% calcium gluconate solution. During 17 days of admission he didn't show any signs of systemic intoxication or deep tissue defects. CONCLUSIONS: Immediate cleansing of the affected area with running cold water is the first critical treatment for a chemical burn due to HF. Applying calcium gluconate gel within one hour was very effective for preventing further damage to the injured area as well as systemic injury. In order to reduce the risk of accident and perform first-aid treatment quickly, it is imperative to provide workers with safety education and establish safety facilities.
Adult ; Animals ; Ankle ; Burns, Chemical ; Calcium Gluconate ; Cold Temperature ; Dyspnea ; Forearm ; Glass ; Gluconates ; Humans ; Hydrofluoric Acid ; Injections, Subcutaneous ; Metals ; Mouth ; Neck ; Necrosis ; Pharyngitis ; Running ; Thigh ; Vital Signs ; Water

As chemicals become common in everyday life, serious burns are increasing due to chemicals. Chemical burns are characterized by continuous tissue destruction until the harmful substances are neutralized. The longer the skin is in contact with the chemical, the deeper the burn can be. In cases of chemical burns caused by glacial acetic acid, the burns were caused by a mixture of a small amount of glacial acetic acid and a large amount of flour. Despite the prolonged contact with the dough, tissue damage was managed through debridement and split thickness skin graft, leading to relatively good results.

Necrotizing fasciitis is a deep soft tissue infection that includes the muscle fascia and subcutaneous fat. It is rare, but it causes necrosis of the muscle, fascia, and subcutaneous tissues. It advances quickly and becomes a life-threatening bacterial infection with high morbidity and mortality. Alcoholics with diabetes are especially vulnerable to necrotizing fasciitis and at high risk of progression to severe sepsis and septic shock. In that sense, early diagnosis and prompt treatment are important in the management of necrotizing fasciitis, especially in diabetic alcoholics. We recently treated necrotizing fasciitis on the left lower leg of a 55-year-old diabetic alcoholic who had not controlled blood sugar for 4 years. In our case, a minor burn wound on the left lower leg caused by the hot ramen soup progressed to necrotizing fasciitis within ten days. The patient who was diagnosed with necrotizing fasciitis of the left lower leg was successfully managed with prompt diagnosis, serial debridement, and a split-thickness skin graft while controlling blood sugar levels.

BACKGROUND: Recently, carbon fibers have been utilized to develop a depth-type microelectrode array for chronic neural recording. Since the diameter of carbon fibers is smaller than the conventional electrodes made of metal wires or microfabricated silicon, the carbon fiber electrodes showed an improved capability for chronic neural recording with less tissue damages. However, the carbon fiber based microelectrodes have a limitation of short insertion depth due to a low stiffness. METHODS: We proposed a carbon fiber based microelectrode array embedded with a mechanical support structure to facilitate the penetration into the deeper brain. The support is made of biodegradable silk fibroin to reduce the reactive tissue responses. The 4-channel carbon fiber based microelectrode arrays were fabricated and accessed in terms of electrochemical impedance, recording capability for 1-month implantation in rat hippocampi. The electrodes with tungsten supports were fabricated and tested as a control group. Immunohistochemical analysis was performed to identify the reactive glial responses. RESULTS: The carbon fiber based electrode arrays with silk supports showed about 2-fold impedance increase 2 weeks after implantation while the number of active electrodes decreased simultaneously. However, after 1 month, the electrode impedance decreased back to its initial value and the percentage of active electrodes also increased above 70%. Immunohistochemical staining clearly showed that the electrodes with silk supports induced less reactive glial responses than that with tungsten supports. CONCLUSION: The proposed carbon fiber based microelectrode array is expected to be used for long-term in vivo neural recording from deep brain regions with the minimized reactive tissue response.
Animals ; Brain ; Carbon ; Electric Impedance ; Electrodes ; Fibroins ; Microelectrodes* ; Rats ; Silicon ; Silk* ; Tungsten

Digital technologies have emerged in various dimensions of human life, ranging from education to professional services to wellbeing. In particular, health products and services have expanded by the use and development of artificial intelligence, mobile health applications, and wearable electronic devices. Such advancements have enabled accurate and updated tracking and modeling of health conditions. For instance, digital health technologies are capable of measuring environmental pollution and predicting its adverse health effects. Several health conditions, including chronic airway diseases such as asthma and chronic obstructive pulmonary disease, can be exacerbated by pollution. These diseases impose substantial health burdens with high morbidity and mortality. Recently, efforts have been made to develop digital technologies to alleviate such conditions. Moreover, the COVID-19 pandemic has facilitated the application of telemedicine and telemonitoring for patients with chronic airway diseases. This article reviews current trends and studies in digital technology utilization for investigating and managing environmental exposure and chronic airway diseases. First, we discussed the recent progression of digital technologies in general environmental healthcare. Then, we summarized the capacity of digital technologies in predicting exacerbation and self-management of airway diseases. Concluding these reviews, we provided suggestions to improve digital health technologies’ abilities to reduce the adverse effects of environmental exposure in chronic airway diseases, based on personal exposure-response modeling.

We previously reported peritoneal innate-like integrin α4 (CD49d)highCD4+ T cells that provided help for B-1a cells. Here we analyzed the expression of various integrin chains on the peritoneal and pleural integrin α4highCD4+ T cells and investigated the functional heterogeneity of the subpopulations based on the integrin expression. Pleural cavity contained a lower ratio of integrin α4highCD4+ T cells to integrin α4lowCD4+ T cells than peritoneal cavity, but the pleural integrin α4highCD4+ T cells have the same characteristics of the peritoneal integrin α4highCD4+ T cells. Most of integrin α4highCD4+ T cells were integrin β1highβ7−, but a minor population of integrin α4highCD4+ T cells was integrin β1+β7+. Interestingly, the integrin α4highβ1highβ7− CD4+ T cells expressed high levels of integrin α4β1 and α6β1, whereas integrin α4highβ1+β7+ CD4+ T cells expressed high levels of integrin α4β1 and α4β7, suggesting an alternative expression of integrin α6β1 or α4β7 in combination with α4β1 in respective major and minor populations of integrin α4highCD4+ T cells. The minor population, integrin α4highβ1+β7+ CD4+ T cells, were different from the integrin α4highβ1highβ7− CD4+ T cells in that they secreted a smaller amount of Th1 cytokines upon stimulation and expressed lower levels of Th1-related chemokine receptors CCR5 and CXCR3 than the integrin α4highβ1 highβ7− CD4+ T cells. In summary, the innate-like integrin α4highCD4+ T cells could be divided into 2 populations, integrin α4β1+α6β1+α4β7− and α4β1+α6β1−α4β7+ cells. The functional significance of serosal integrin α4β7+ CD4+ T cells needed to be investigated especially in view of mucosal immunity.
CD4-Positive T-Lymphocytes ; Cytokines ; Immunity, Mucosal ; Integrin alpha4 ; Peritoneal Cavity ; Pleural Cavity ; Population Characteristics ; Receptors, CCR5 ; Receptors, Chemokine ; Receptors, CXCR3 ; T-Lymphocytes* ; Th1 Cells