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"Risk factors"

Review

[English]

Neurodevelopmental disorders, which emerge early in development, include a range of neurological phenotypes and exhibit marked differences in prevalence between sexes. A male predominance is particularly pronounced in autism spectrum disorder (ASD). Although the precise cause of ASD is still unknown, certain genetic variations and environmental influences have been implicated as risk factors. Preclinical ASD models have been instrumental in shedding light on the mechanisms behind the sexual dimorphism observed in this disorder. In this review, we explore the potential processes contributing to sex bias by examining both intrinsic differences in neuronal mechanisms and the influence of external factors. We organize these mechanisms into six categories: 1) sexually dimorphic phenotypes in mice with mutations in ASD-associated genes related to synaptic dysfunction; 2) sex-specific microglial activity, which may disrupt neural circuit development by excessively pruning synapses during critical periods; 3) sex steroid hormones, such as testosterone and allopregnanolone, that differentially influence brain structure and function; 4) escape from X chromosome inactivation of the O-linked-N-acetylglucosamine transferase gene in the placenta; 5) sexually dimorphic activation of the integrated stress response pathway following maternal immune activation; and 6) immunological responses that are differentially regulated by sex. Understanding these mechanisms is essential for deciphering the underlying causes of ASD and may offer insights into other disorders with notable sex disparities.

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Review Article

[English]
Clostridium difficile Infections in Children
Joo Hyun Gil, Jeong Wan Seo
Ewha Med J 2011;34(2):3-12.   Published online September 30, 2011
DOI: https://doi.org/10.12771/emj.2011.34.2.3

During the past decade, rates of Clostridium difficile infection (CDI) increased worldwide. Hypervirulent strains of C. difficile such as NAP1/BI/027 and PCR ribotype 078 have emerged that have changed the epidemiology of CDI. Especially, CDI rates also have increased in the community, in children previously thought to be at low risk. Recently, the use of gastric acid suppressant that facilitates intestinal transit of the bacteria and presence of inflammatory bowel disease has been reported as risk factors. Treatment for CDI usually relies on metronidazole or vancomycin, but recurrence rates remains high. New treatment options for multiple recurrence are challenging. In this article, we reviewed recent epidemiological changes, current knowledge of virulence factors, reasonable approach to the diagnosis, and optimal treatment of CDI. But, clinical guidelines for pediatric C. difficile disease have not been defined. It seems that the consensus and recommendations for managing pediatric CDI are urgently needed.

Citations

Citations to this article as recorded by  
  • Incidence and Characteristics ofClostridioides difficileInfection in Children
    Heera Jeong, Ji-Man Kang, Jong Gyun Ahn
    Pediatric Infection & Vaccine.2020; 27(3): 158.     CrossRef
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  • 1 Crossref
Original Articles
[English]
Identification of Related Risk Factors of Chronic Prostatitis
Bong Suk Shim, Young Yo Park
Ihwa Ŭidae chi 2005;28(1):37-42.   Published online March 30, 2005
DOI: https://doi.org/10.12771/emj.2005.28.1.37
Objectives

Chronic prostatitis is difficult to treat and unintelligible disease with multi-factorial etiology, various pathophysiology and several clinical manifestations rather than simple single disease. Therefore, it is thought to be important successful treatment and courtesy call that grasp whether some elements influence incidence of disease. The authors wished to search factors which influence the development and the progress of chronic prostatitis.

Methods

From January, 2004 to October, 184 patients who undergo diagnosis as chronic prostatitis were selected, and chose healthy 40 men for comparative analysis to control group. Subjects were investigated for the status of profession and form of work, driving, motorcycle or bicycle utilization, drinking, smoking and sex, and the style of behavior and diet.

Results

Average age of chronic prostatitis(CP) group and control group was no difference. The classification of specific profession did not show relevant difference, but sedentary desk workers were much excellently than CP group(40.0%) by control group(53.8%)(p<0.05). Driver's ratio more than 1 day 1 hour was high in CP group than control group(22.5%) by 28.3%(p<0.05). A person who ride motorcycle or bicycle did not show relevant difference(p>0.05). A person who ejaculate more than once a week through any manner, was less CP group(51.1%) than control group(62.5%), but showed high ratio by person with ejaculation less than 1-2 time a month and daily ejaculation in CP group(p<0.05). A person who drinks more than once a week was many in CP group(p<0.05), and also a person who drink more than 1 bottle of soju expressively high ratio show in CP group(p<0.05), In dietary life habit, CP group showed high ratio by salty food preference degree(p<0.05).

Conclusion

Some factors look that have important effect in disease change for the worse progress of chronic prostatitis. Therefore, it is thought should be gone side by side that reform this detecting eating habit and lifestyle that can exacerbate the disease along with general medication in treatment.

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[English]
Objectives

This study was performed to evaluate the impact of various peri-transplant factors on transfusion requirements in 45 patients with leukemia or severe aplastic anemia undergoing HLA-matched allogeneic bone marrow transplantation(BMT).

Methods

All patients were treated in an isolated room with HEPA filtration, and the combination of cyclosporin and short-course of methotrexate was used for GVHD prophylaxis. Patients received irradiated packed red cells to maintain the hematocrit ≥30% and irradiated platelet pheresis to keep the platelet count ≥20,000/µl.

Results

In the first month, the mean(range) number of red cells and platelet pheresis were 4.9(0-21), 26.7(8-61), respectively. On univariate analyses, pre-BMT status(high-risk : 7.94±5.14 vs standard-risk: 3.78±2.99, p=0.0076) and concurrent infection(present : 8.41±4.70 vs absent : 3.33±2.72, p=0.0005) and sex incompatibility(match : 4.67±3.72 vs female → male : 3.78±3.07 vs male → female : 9.13±5.74, p=0.0161) were significantly associated with red cell requirements in the first month. Also, high-risk pre-BMT status(32.25±16.15 vs 20.25±14.64, p=0.0l56), the presence of concurrent infection(39.35±16.42 vs 15.33±5.67, p=0.0001) and veno-occlusive disease(45.00±14.47 vs 22.00±14.49, p=0.0055) increased platelet requirements significantly after allogeneic BMT. In particular, pre-BMT disease status was found to be independently associated with transfusion requirements.

Conclusion

This study demonstrates that pre-BMT status does influence transfusion requirements in the first month after HLA-matched allogeneic BMT. Further studies are necessary to confirm these results and to define optimal transfusion strategies.

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[English]
Objectives

Hepatic veno-occlusive disease(VOD) is a major life-threatening complication of bone marrow transplantation(BMT) caused by high-dose chemotherapy or radiotherapy. The aim of this study is to evaluate the incidence, risk factors, prophylactic effects of low-dose heparin and pentoxifylline(PTX) and therapeutic response to recombinant human tissue plasminogen activator(rt-PA) in VOD patients with leukemia after allogeneic BMT.

Methods

Thirty-two consecutive leukemia patients who underwent HLA-matched allogeneic BMT were included in this study. VOD was clinically defined as having two of the following features : hyperbilirubinemia(≥2mg/dL), tender hepatomegaly, unexplained weight gain(>2% from baseline) and/or ascites. Low-dose heparin(l00unit/kg/day, IV) and PTX(1,600mg/day, P0) were administered for the prevention of VOD.

Results

The median age of recipients in this study was 27(17 - 44) years. Patients were treated for the following diseases : 17(53.1%) for acute myeloid leukemia(AML), 10(31.3%) for acute lymphoblastic leukemia(ALL) and 5(15.6%) for chronic myeloid leukemia(CML). Fourteen patients(43.7%) were classified as having high-risk pre-BMT status. Of the 32 consecutive patients undergoing allogeneic BMT, 5(15.6%) developed VOD. A higher risk of developing VOD was associated with pre-BMT disease status(p<0.01). All VOD patients received rt-PA-based thrombolytic therapy and complete resolution was achieved in-4(80.0%) of 5 patients without significant bleeding complications.

Conclusion

Further studies are needed to develop more effective prophylactic and thera-peutic approaches of VOD in patients with high-risk leukemia after allogeneic BMT.

Citations

Citations to this article as recorded by  
  • Enfermedad Veno-oclusiva Hepática/Síndrome de Obstrucción Sinusoidal: actualización de los aspectos fisiopatológicos, criterios diagnósticos y opciones terapéuticas.
    Raif Nasre Nasser, Magdalena Correa Vega, Norlis Colmenares Álvarez, Mariener Sánchez Dugarte, Martí Quevedo Pinos
    Oncología (Ecuador).2017; : 168.     CrossRef
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