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Articles by H. M Kim
Total Records ( 4 ) for H. M Kim
  M. A Ilgen , A. S. B Bohnert , R. V Ignacio , J. F McCarthy , M. M Valenstein , H. M Kim and F. C. Blow
 

Context  Although numerous studies have documented the clear link between psychiatric conditions and suicide, few have allowed for the comparison between the strength of association between different psychiatric diagnoses and suicide.

Objective  To examine the strength of association between different types of psychiatric diagnoses and the risk of suicide in patients receiving health care services from the Department of Veterans Affairs in fiscal year (FY) 1999.

Design  This project examined National Death Index data and Veterans Health Administration patient treatment records.

Setting  Department of Veterans Affairs, Veterans Health Administration.

Participants  All veterans who used Veterans Health Administration services during FY 1999 (N = 3 291 891) who were alive at the start of FY 2000.

Main Outcome Measures  Psychiatric diagnoses were obtained from patient treatment records in FY 1998 and 1999 and used to predict subsequent death by suicide during the following 7 years in sex-stratified survival analyses controlling for age.

Results  In the 7 years after FY 1999, 7684 veterans died by suicide. In diagnosis-specific analyses, patients with bipolar disorder had the greatest estimated risk of suicide among men (hazard ratio, 2.98; 95% confidence interval, 2.73-3.25), and patients with substance use disorders had the greatest risk among women (6.62; 4.72-9.29).

Conclusions  Although all the examined psychiatric diagnoses were associated with elevated risk of suicide in veterans, results indicate that men with bipolar disorder and women with substance use disorders are at particularly elevated risk for suicide.

  M. N Lee , S. N Lee , S. H Kim , B Kim , B. K Jung , J. H Seo , J. H Park , J. H Choi , S. H Yim , M. R Lee , J. G Park , J. Y Yoo , J. H Kim , S. T Lee , H. M Kim , S Ryeom , K. W Kim and G. T. Oh
  Background

Vascular endothelial growth factor A (VEGFA), a critical mediator of tumor angiogenesis, is a well-characterized target of hypoxia-inducible factor 1 (HIF-1). Murine arrest-defective protein 1A (mARD1A225) acetylates HIF-1, triggering its degradation, and thus may play a role in decreased expression of VEGFA.

Methods

We generated ApcMin/+/mARD1A225 transgenic mice and quantified growth of intestinal polyps. Human gastric MKN74 and murine melanoma B16F10 cells overexpressing mARD1A225 were injected into mice, and tumor growth and metastasis were measured. VEGFA expression and microvessel density in tumors were assessed using immunohistochemistry. To evaluate the role of mARD1A225 acetylation of Lys532 in HIF-1, we injected B16F10-mARD1A225 cell lines stably expressing mutant HIF-1/K532R into mice and measured metastasis. All statistical tests were two-sided, and P values less than .05 were considered statistically significant.

Results

ApcMin/+/mARD1A225 transgenic mice (n = 25) had statistically significantly fewer intestinal polyps than ApcMin/+ mice (n = 21) (number of intestinal polyps per mouse: ApcMin/+ mice vs ApcMin/+/mARD1A225 transgenic mice, mean = 83.4 vs 38.0 polyps, difference = 45.4 polyps, 95% confidence interval [CI] = 41.8 to 48.6; P < .001). The growth and metastases of transplanted tumors were also statistically significantly reduced in mice injected with mARD1A225-overexpressing cells than in mice injected with control cells (P < .01). Moreover, overexpression of mARD1A225 decreased VEGFA expression and microvessel density in tumor xenografts (P < .04) and ApcMin/+ intestinal polyps (P = .001). Mutation of lysine 532 of HIF-1 in B16F10-mARD1A225 cells prevented HIF-1 degradation and inhibited the antimetastatic effect of mARD1A225 (P < .001).

Conclusion

mARD1A225 may be a novel upstream target that blocks VEGFA expression and tumor-related angiogenesis.

  K Yang , N Jeong , J. K Moon , Y. H Lee , S. H Lee , H. M Kim , C. H Hwang , K Back , R. G Palmer and S. C. Jeong
 

Soybean exhibits natural variation in flower and seed coat colors via the deposition of various anthocyanin pigments in the respective tissues. Although pigmentation in seeds or flowers has been well dissected at molecular level in several plant species, the genes controlling natural variation in anthocyanin traits in the soybean are not completely understood. To evaluate the genetic correlation between genetic loci and genes, 8 enzyme-encoding gene families and a transcription factor were localized in a soybean genome-wide genetic map. Among the seed coat color–controlling loci, the genetic location of the gene encoding for W1 was substantiated in the context of the current soybean molecular genetic map and O was postulated to correspond to anthocyanidin reductase. Among the genetic loci that regulate flower pigmentation, the genetic locations of the genes encoding for W1, W4, and Wp were identified, W3 was mapped on soybean linkage group B2 (chromosome 14), and W2 was postulated to correspond to an MYB transcription factor. Correlation studies between the developed markers and 3 color-controlling loci provided important empirical data that should prove useful in the design of marker-assisted breeding schemes as well as future association studies involving soybean.

  R. Z Tashjian , A. M Hollins , H. M Kim , S. A Teefey , W. D Middleton , K Steger May , L. M Galatz and K. Yamaguchi
 

Background: Double-row arthroscopic rotator cuff repairs were developed to improve initial biomechanical strength of repairs to improve healing rates. Despite biomechanical improvements, failure of healing remains a clinical problem.

Purpose: To evaluate the anatomical results after double-row arthroscopic rotator cuff repair with ultrasound to determine postoperative repair integrity and the effect of various factors on tendon healing.

Study Design: Case series; Level of evidence, 4.

Methods: Forty-eight patients (49 shoulders) who had a complete arthroscopic rotator cuff repair (double-row technique) were evaluated with ultrasound at a minimum of 6 months after surgery. Outcome was evaluated at a minimum of 1-year follow-up with standardized history and physical examination, visual analog scale for pain, active forward elevation, and preoperative and postoperative shoulder scores according to the system of the American Shoulder and Elbow Surgeons and the Simple Shoulder Test. Quantitative strength was measured postoperatively.

Results: Ultrasound and physical examinations were performed at a minimum of 6 months after surgery (mean, 16 months; range, 6 to 36 months) and outcome questionnaire evaluations at a minimum of 12 months after surgery (mean, 29 months; range, 12 to 55 months). Of 49 repairs, 25 (51%) were healed. Healing rates were 67% in single-tendon tears (16 of 24 shoulders) and 36% in multitendon tears (9 of 25 shoulders). Older age and longer duration of follow-up were correlated with poorer tendon healing (P < .03). Visual analog scale for pain, active forward elevation, American Shoulder and Elbow Surgeons scores, and Simple Shoulder Test scores all had significant improvement from baseline after repair (P < .0001).

Conclusion: Increased age and longer duration of follow-up were associated with lower healing rates after double-row rotator cuff repair. The biological limitation at the repair site, as reflected by the effects of age on healing, appears to be the most important factor influencing tendon healing, even after maximizing repair biomechanical strength with a double-row construct.

 
 
 
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