Diffuse Glomerular Nodular Lesions in Diabetic Pigs Carrying a Dominant-Negative Mutant Hepatocyte Nuclear Factor 1-Alpha, an Inheritant Diabetic Gene in Humans

<div><p>Glomerular nodular lesions, known as Kimmelstiel-Wilson nodules, are a pathological hallmark of progressive human diabetic nephropathy. We have induced severe diabetes in pigs carrying a dominant-negative mutant hepatocyte nuclear factor 1-alpha (HNF1α) P291fsinsC, a maturity-onset diabetes of the young type-3 (MODY3) gene in humans. In this model, glomerular pathology revealed that formation of diffuse glomerular nodules commenced as young as 1 month of age and increased in size and incidence until the age of 10 months, the end of the study period. Immunohistochemistry showed that the nodules consisted of various collagen types (I, III, IV, V and VI) with advanced glycation end-product (AGE) and <i>N</i>^ε-carboxymethyl-lysine (CML) deposition, similar to those in human diabetic nodules, except for collagen type I. Transforming growth factor-beta (TGF-β) was also expressed exclusively in the nodules. The ultrastructure of the nodules comprised predominant interstitial-type collagen deposition arising from the mesangial matrices. Curiously, these nodules were found predominantly in the deep cortex. However, diabetic pigs failed to show any of the features characteristic of human diabetic nephropathy; e.g., proteinuria, glomerular basement membrane thickening, exudative lesions, mesangiolysis, tubular atrophy, interstitial fibrosis, and vascular hyalinosis. The pigs showed only Armanni-Ebstein lesions, a characteristic tubular manifestation in human diabetes. RT-PCR analysis showed that glomeruli in wild-type pigs did not express endogenous HNF1α and HNF1β, indicating that mutant HNF1α did not directly contribute to glomerular nodular formation in diabetic pigs. In conclusion, pigs harboring the dominant-negative mutant human MODY3 gene showed reproducible and distinct glomerular nodules, possibly due to AGE- and CML-based collagen accumulation. Although the pathology differed in several respects from that of human glomerular nodular lesions, the somewhat acute and constitutive formation of nodules in this mammalian model might provide information facilitating identification of the principal mechanism underlying diabetic nodular sclerosis.</p></div

Reverse transcription-PCR for endogenous HNF1α and HNF1β in wild-type pigs at 4 weeks of age.

<p>Both HNF1α (<b>A</b>) and HNF1β (<b>B</b>) were negative in isolated glomeruli. Liver was used as a positive control, and heart as a negative control. G  =  isolated glomeruli; L  =  liver; H  =  heart.</p

Transmission electron microscopy at age 4 weeks (A,B,E) and 5 months (C,D) in transgenic pigs.

<p><b>A</b>) In 4-week-old transgenic pigs, mesangial widening is associated with fiber deposition in the mesangial matrices. Magnification: 2,000×. <b>B</b>) Fibers accumulated at mesangial areas, forming early lesion. Magnification: 500×. <b>C</b>) At 5 months, established glomerular nodules showed that mesangial areas and capillary lumens are filled with bright fibers (arrows). Vacuolations of proximal tubules were also seen (arrowheads). Magnification: 300×. <b>D</b>) Subendothelial widening with loss of endothelial fenestration and mesangial interposition are shown. Note that collagen is also found in the subendothelial spaces (arrows). Magnification: 1,500×. <b>E</b>) The nodules consist of fibril collagens with cross striation, indicating interstitial-type forms of collagen fibrils. Magnification: 10,000×. <b>F</b>) Thickness of glomerular basement membranes in transgenic pigs was no different from those in wild-type pigs at 4 weeks and 5 months old. Transgenic pigs; n = 1, wild-type pigs; n = 3. Tg  =  transgenic pigs; WT  =  wild-type pigs; GBM  =  glomerular basement membrane.</p

Analysis of biochemical parameters in transgenic (Tg) and wild-type (WT) pigs at age 1, 5 and 10 months.

<p>Aberrations: Tg  =  transgenic pigs; WT  =  wild-type pigs; *: n = 1.</p

Renal pathological findings at age 4 and 19 weeks in transgenic pigs.

<p><b>A</b>) In transgenic pigs, mesangial expansion commenced as early as 4 weeks. At 19 weeks, distinct glomerular nodules had formed. Magnification: 400×. <b>B</b>) The number of glomeruli with nodules as a fraction of the total number was compared between the superficial cortex and deep cortex. <b>C</b>) Glomerular tuft area in superficial and deep cortexes was compared between wild-type pigs and transgenic pigs. Transgenic pigs; n = 3, wild-type pigs; n = 3. *<i>P</i><0.05. WT  =  wild-type pigs; Tg  =  transgenic pigs.</p

DataSheet1_A Bayesian approach for constituent estimation in nucleic acid mixture models.docx

Mass spectrometry (MS) is a powerful analytical method used for various purposes such as drug development, quality assurance, food inspection, and monitoring of pollutants in the environment. In recent years, with the active development of antibodies and nucleic acid-based drugs, impurities with various modifications are produced. These can lead to a decrease in drug stability, pharmacokinetics, and efficacy, making it crucial to differentiate these impurities. Previously, attempts have been made to estimate the monoisotopic mass and ion amounts in the spectrum generated by electrospray ionization (ESI). However, conventional methods could not explicitly estimate the number of constituents, and discrete state evaluations, such as the probability that the number of constituents is k or k+1, were not possible. We propose a method where, for each possible number of constituents in the sample, mass spectrometry is modeled using parameters like monoisotopic mass and ion counts. Using Simulated Annealing, NUTS, and stochastic variational inference, we determine the parameters for each constituent number model and the maximum posterior probability. Finally, by comparing the maximum posterior probabilities between models, we select the optimal number of constituents and estimate the monoisotopic mass and ion counts under that scenario.</p

Image_1_Case report: Rosai-Dorfman disease with rare extranodal lesions in the pelvis, heart, liver and skin.jpeg

Rosai-Dorfman disease (RDD), a rare form of non-Langerhans cell histiocytosis, can involve systemic extranodal lesions. Skin lesions are the most common, whereas intrapelvic, cardiac, and hepatic lesions are infrequent. The present study describes a 74-year-old woman with multiple extranodal lesions in the pelvis, heart, liver, and skin that were successfully treated with glucocorticoid therapy. She had experienced fever and persistent inflammation without cervical lymphadenopathy for several months and 18F-fluorodeoxyglucose (FDG) positron emission tomography (PET) showed abnormal FDG uptake in the left cheek; cervical, axillary, inguinal lymph nodes; periatrium; and pelvis. She was diagnosed with RDD based on skin and pelvic biopsies. Although this was an atypical case without bilateral cervical lymphadenopathy, the FDG-PET detection of inflammatory lesions led to selection of suitable biopsy sites, and pathological examination led to a correct diagnosis. Findings in this patient indicate that RDD can present with an atypical distribution of infrequent extranodal lesions, with attention required to prevent a delayed diagnosis.</p

Additional file 2: Table S2. of New clues to the nature of immunoglobulin G4-related disease: a retrospective Japanese multicenter study of baseline clinical features of 334 cases

Factor analysis of the affected organs. (DOC 33 kb

Additional file 1: Table S1. of New clues to the nature of immunoglobulin G4-related disease: a retrospective Japanese multicenter study of baseline clinical features of 334 cases

Gender differences in affected organs. (DOC 64.5 kb