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Chen JM, Wan Q, Zhu HY, Ge YQ, Wu LL, Zhai J, Ding ZM. [The value of conventional magnetic resonance imaging based radiomic model in predicting the texture of pituitary macroadenoma]. Zhonghua Yi Xue Za Zhi 2020; 100:3626-3631. [PMID: 33333688 DOI: 10.3760/cma.j.cn112137-20200511-01511] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the value of conventional magnetic resonance imaging (MRI) based radiomic model in predicting the texture of pituitary macroadenoma. Methods: The complete data of 101 patients with pituitary macroadenoma confirmed by surgery and pathology in Yijishan Hospital of Wannan Medical College from December 2014 to December 2019 were retrospectively analyzed. According to the texture of the intraoperative pituitary tumor, patients were divided into soft group (n=58) and hard group (n=43). They were randomly divided into training group (n=72) and validation group (n=29) at a ratio of 7∶3. All patients underwent conventional MRI scan of the pituitary gland. Itk-snap software was used to manually outline the T(1)-weighted image (T(1)WI), T(2)-weighted image (T(2)WI) and enhanced T(1)WI image section by section on tumor area of interest (ROI) and perform three-dimensional fusion. Then AK software was imported to extract texture features. The regression analysis methods of minimum redundancy maximum relevance (mRMR) and least absolute shrinkage and selection operator (LASSO) were used for feature selection and radiomic signature establishment. The reliability of the model was verified by 100 leave-group-out cross validation (LGOCV), and the predictive ability of the model was evaluated by drawing the receiver operating characteristic (ROC) curve. The decision curve analysis (DCA) was used to evaluate the clinical application value of the model. Results: The AUC (Area Under the ROC Curve) (95%CI) values of T1WI, T2WI, enhanced T1WI, and the combined sequence model to predict the texture of pituitary macroadenomas in the training and validation groups were 0.91 (0.84-0.98) and 0.90 (0.78-1.00), 0.86 (0.78-0.95) and 0.83 (0.64-1.00), 0.90 (0.83-0.97) and 0.89 (0.77-1.00),0.92 (0.85-0.98) and 0.91 (0.79-1.00), respectively. DCA demonstrated that T(1)WI, T(2)WI, enhanced T(1)WI, and combined sequence model all had good net benefits in clinical practice. Conclusions: T(1)WI, T(2)WI, enhanced T(1)WI, and combined sequence model of conventional MRI all had high efficacy in predicting the texture of pituitary macroadenoma, which provided a new quantitative method for predicting the texture of pituitary macroadenoma.
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Affiliation(s)
- J M Chen
- Medical Imaging Central, Yijishan Hospital of Wannan Medical College, Wuhu 241001, China
| | - Q Wan
- Medical Imaging Central, Yijishan Hospital of Wannan Medical College, Wuhu 241001, China
| | - H Y Zhu
- Medical Imaging Central, Yijishan Hospital of Wannan Medical College, Wuhu 241001, China
| | - Y Q Ge
- GE health care, Shanghai 200000, China
| | - L L Wu
- Medical Imaging Central, Yijishan Hospital of Wannan Medical College, Wuhu 241001, China
| | - J Zhai
- Medical Imaging Central, Yijishan Hospital of Wannan Medical College, Wuhu 241001, China
| | - Z M Ding
- Medical Imaging Central, Yijishan Hospital of Wannan Medical College, Wuhu 241001, China
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Vogel P, Gelfman CM, Issa T, Payne BJ, Hansen GM, Read RW, Jones C, Pitcher MR, Ding ZM, DaCosta CM, Shadoan MK, Vance RB, Powell DR. Nephronophthisis and retinal degeneration in tmem218-/- mice: a novel mouse model for Senior-Løken syndrome? Vet Pathol 2014; 52:580-95. [PMID: 25161209 DOI: 10.1177/0300985814547392] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Mice deficient in TMEM218 (Tmem218(-/-) ) were generated as part of an effort to identify and validate pharmaceutically tractable targets for drug development through large-scale phenotypic screening of knockout mice. Routine diagnostics, expression analysis, histopathology, and electroretinogram analyses completed on Tmem218(-/-) mice identified a previously unknown role for TMEM218 in the development and function of the kidney and eye. The major observed phenotypes in Tmem218(-/-) mice were progressive cystic kidney disease and retinal degeneration. The renal lesions were characterized by diffuse renal cyst development with tubulointerstitial nephropathy and disruption of tubular basement membranes in essentially normal-sized kidneys. The retinal lesions were characterized by slow-onset loss of photoreceptors, which resulted in reduced electroretinogram responses. These renal and retinal lesions are most similar to those associated with nephronophthisis (NPHP) and retinitis pigmentosa in humans. At least 10% of NPHP cases present with extrarenal conditions, which most often include retinal degeneration. Senior-Løken syndrome is characterized by the concurrent development of autosomal recessive NPHP and retinitis pigmentosa. Since mutations in the known NPHP genes collectively account for only about 30% of NPHP cases, it is possible that TMEM218 could be involved in the development of similar ciliopathies in humans. In reviewing all other reported mouse models of NPHP, we suggest that Tmem218(-/-) mice could provide a useful model for elucidating the pathogenesis of cilia-associated disease in both the kidney and the retina, as well as in developing and testing novel therapeutic strategies for Senior-Løken syndrome.
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Affiliation(s)
- P Vogel
- Department of Pathology, Lexicon Pharmaceuticals Inc., The Woodlands, TX, USA
| | - C M Gelfman
- Department of Ophthalmology, Lexicon Pharmaceuticals Inc., The Woodlands, TX, USA
| | - T Issa
- Department of Ophthalmology, Lexicon Pharmaceuticals Inc., The Woodlands, TX, USA
| | - B J Payne
- Department of Pathology, Lexicon Pharmaceuticals Inc., The Woodlands, TX, USA
| | - G M Hansen
- Department of Molecular Genetics, Lexicon Pharmaceuticals Inc., The Woodlands, TX, USA
| | - R W Read
- Department of Pathology, Lexicon Pharmaceuticals Inc., The Woodlands, TX, USA
| | - C Jones
- Department of Ophthalmology, Lexicon Pharmaceuticals Inc., The Woodlands, TX, USA
| | - M R Pitcher
- Department of Ophthalmology, Lexicon Pharmaceuticals Inc., The Woodlands, TX, USA
| | - Z-M Ding
- Department of Metabolism, Lexicon Pharmaceuticals Inc., The Woodlands, TX, USA
| | - C M DaCosta
- Department of Metabolism, Lexicon Pharmaceuticals Inc., The Woodlands, TX, USA
| | - M K Shadoan
- Department of Metabolism, Lexicon Pharmaceuticals Inc., The Woodlands, TX, USA
| | - R B Vance
- Department of Pathology, Lexicon Pharmaceuticals Inc., The Woodlands, TX, USA
| | - D R Powell
- Department of Metabolism, Lexicon Pharmaceuticals Inc., The Woodlands, TX, USA
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Briaud SA, Ding ZM, Michael LH, Entman ML, Daniel S, Ballantyne CM. Leukocyte trafficking and myocardial reperfusion injury in ICAM-1/P-selectin-knockout mice. Am J Physiol Heart Circ Physiol 2001; 280:H60-7. [PMID: 11123218 DOI: 10.1152/ajpheart.2001.280.1.h60] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
P-selectin and intercellular adhesion molecule-1 (ICAM-1) mediate early interaction and adhesion of neutrophils to coronary endothelial cells and myocytes after myocardial ischemia and reperfusion. In the present study, we examined the physiological consequences of genetic deletions of ICAM-1 and P-selectin in mice. In wild-type mice, after 1 h of ischemia followed by reperfusion, neutrophil influx into the area of ischemia was increased by 3 h with a peak at 24 h and a decline by 72 h. ICAM-1/P-selectin-deficient mice showed a significant reduction in neutrophils by immunohistochemistry or by myeloperoxidase activity at 24 h but no significant difference at 3 h. Infarct size (area of necrosis/area at risk) assessed 24 h after reperfusion was not different between wild-type and deficient mice after 30 min and 1 h of occlusion. Mice with a deficiency in both ICAM-1 and P-selectin have impaired neutrophil trafficking without a difference in infarct size due to myocardial ischemia-reperfusion.
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Affiliation(s)
- S A Briaud
- Section of Cardiovascular Sciences, Department of Medicine, Baylor College of Medicine, Houston, Texas 77030, USA
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Ding ZM, Babensee JE, Simon SI, Lu H, Perrard JL, Bullard DC, Dai XY, Bromley SK, Dustin ML, Entman ML, Smith CW, Ballantyne CM. Relative contribution of LFA-1 and Mac-1 to neutrophil adhesion and migration. J Immunol 1999; 163:5029-38. [PMID: 10528208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
To differentiate the unique and overlapping functions of LFA-1 and Mac-1, LFA-1-deficient mice were developed by targeted homologous recombination in embryonic stem cells, and neutrophil function was compared in vitro and in vivo with Mac-1-deficient, CD18-deficient, and wild-type mice. LFA-1-deficient mice exhibit leukocytosis but do not develop spontaneous infections, in contrast to CD18-deficient mice. After zymosan-activated serum stimulation, LFA-1-deficient neutrophils demonstrated activation, evidenced by up-regulation of surface Mac-1, but did not show increased adhesion to purified ICAM-1 or endothelial cells, similar to CD18-deficient neutrophils. Adhesion of Mac-1-deficient neutrophils significantly increased with stimulation, although adhesion was lower than for wild-type neutrophils. Evaluation of the strength of adhesion through LFA-1, Mac-1, and CD18 indicated a marked reduction in firm attachment, with increasing shear stress in LFA-1-deficient neutrophils, similar to CD18-deficient neutrophils, and only a modest reduction in Mac-1-deficient neutrophils. Leukocyte influx in a subcutaneous air pouch in response to TNF-alpha was reduced by 67% and 59% in LFA-1- and CD18-deficient mice but increased by 198% in Mac-1-deficient mice. Genetic deficiencies demonstrate that both LFA-1 and Mac-1 contribute to adhesion of neutrophils to endothelial cells and ICAM-1, but adhesion through LFA-1 overshadows the contribution from Mac-1. Neutrophil extravasation in response to TNF-alpha in LFA-1-deficient mice dramatically decreased, whereas neutrophil extravasation in Mac-1-deficient mice markedly increased.
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Affiliation(s)
- Z M Ding
- Speros P. Martel Laboratory of Leukocyte Biology, Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030, USA
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Abstract
Mouse uterine epithelial cells (UEC) express high levels of both messenger RNA (mRNA) and protein encoding the polymorphic mucin glycoprotein, Muc-1, under most conditions in vivo and in vitro. Although steroid hormones modulate Muc-1 expression in vivo, it is not clear if these actions are mediated directly by steroid hormone receptors or indirectly by modulation of key intracellular signal transduction cascades. To address the latter issue, we examined the effects of a wide variety of modulators of signal transduction cascades on the expression of Muc-1 in primary cultures of polarized mouse UEC. Transient exposure of UEC to agents that inhibit tyrosine kinases by distinct mechanisms, i.e., tyrphostin, genistein, and staurosporine, consistently and significantly reduced Muc-1 expression. In contrast, a variety of agents that modulate protein kinase A- or C-dependent pathways had little or no effect on Muc-1. The effect of tyrphostin proved to be similar in magnitude at both the level of Muc-1 protein and mRNA expression. Transient transfection assays of mouse UEC and a murine mammary epithelial cell line, NMuMG, with mouse Muc-1 promoter-CAT reporter constructs demonstrated a similar (50-60%) degree of tyrphostin inhibition. These observations suggested an action at the level of Muc-1 gene expression. Levels of 100,000 g soluble tyrosine kinase activity in mouse UEC freshly isolated from estrous stage (high-level Muc-1 expression) and day 4 of pregnancy (low-level Muc-1 expression) correlated with Muc-1 expression. Furthermore, pretreatment of day 4 pregnant mice with the anti-progestin, RU486, an agent previously shown to restore or maintain high levels of Muc-1 expression, also restored soluble tyrosine kinase activity to levels similar to that observed in estrous stage mice. Collectively, these results indicate that tyrosine kinase activity is required to maintain high level Muc-1 expression in mice.
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Affiliation(s)
- C C Wegner
- Department of Biochemistry and Molecular Biology, University of Texas, M.D. Anderson Cancer Center, Houston 77030, USA
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Ding ZM, Cristiano RJ, Roth JA, Takacs B, Kuo MT. Malarial circumsporozoite protein is a novel gene delivery vehicle to primary hepatocyte cultures and cultured cells. J Biol Chem 1995; 270:3667-76. [PMID: 7533154 DOI: 10.1074/jbc.270.8.3667] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
In this report we describe a novel gene delivery system using malaria circumsporozoite (CS) protein as a specific ligand. The CS protein covers the entire surface of sporozoites of malaria parasites. Previous studies have demonstrated that intravenously injected CS protein binds specifically to the basolateral surface of hepatocytes within minutes, indicating the high hepatocyte specificity of CS protein. This characteristic of CS protein prompted us to explore the possibility of using this protein as a liver-specific ligand for hepatic gene delivery vehicle. As an initial step, we investigated the efficacy of CS protein-mediated gene transfer into primary hepatocytes as well as established cell lines. Recombinant CS proteins were chemically conjugated to poly(L-lysine). The CS conjugates were complexed with recombinant plasmid DNA carrying a reporter gene. When the DNA complex was used to transfect primary hepatocytes, a very low level of expression of the reporter gene was observed. The level of expression was greatly enhanced when the cells were cotransfected with adenovirus, which presumably releases the internalized DNA from endosomal entrapment. The CS-mediated gene transfer into the cells required region II+, an evolutionarily conserved amino acid sequence conferring the binding of CS protein to its receptor. CS protein also efficiently mediated gene transfer into a number of cell lines, i.e. HepG2, HeLa, NIH3T3, and K562, but not HL-60, which contains low levels of receptor. Thus, the CS conjugate can be used to deliver DNA into many different cultured cells. Most importantly, the CS conjugate has a potential to be further developed into a liver-specific gene delivery vehicle in vivo.
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Affiliation(s)
- Z M Ding
- Department of Molecular Pathology, University of Texas M. D. Anderson Cancer Center, Houston 77030
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Wen JZ, Huang H, Fan Y, Ding ZM. [Identification of microsporidian pathogen in Chinese medicinal insect Martianus dermestoides Chevr]. Zhongguo Zhong Yao Za Zhi 1994; 19:15-6, 61. [PMID: 8011116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- J Z Wen
- Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing
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Ding ZM, Harshey RM, Hurley LH. (+)-CC-1065 as a structural probe of Mu transposase-induced bending of DNA: overcoming limitations of hydroxyl-radical footprinting. Nucleic Acids Res 1993; 21:4281-7. [PMID: 8414983 PMCID: PMC310062 DOI: 10.1093/nar/21.18.4281] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Phage Mu transposase (A-protein) is primarily responsible for transposition of the Mu genome. The protein binds to six att sites, three at each end of Mu DNA. At most att sites interaction of a protein monomer with DNA is seen to occur over three minor and two consecutive major grooves and to result in bending up to about 90 degrees. To probe the directionality and locus of these A-protein-induced bends, we have used the antitumor antibiotic (+)-CC-1065 as a structural probe. As a consequence of binding within the minor groove, (+)-CC-1065 is able to alkylate N3 of adenine in a sequence selective manner. This selectivity is partially determined by conformational flexibility of the DNA sequence, and the covalent adduct has a bent DNA structure in which narrowing of the minor groove has occurred. Using this drug in experiments in which either gel retardation or DNA strand breakage are used to monitor the stability of the A-protein--DNA complex or the (+)-CC-1065 alkylation sites on DNA (att site L3), we have demonstrated that of the three minor grooves implicated in the interaction with A-protein, the peripheral two are 'open' or accessible to drug bonding following protein binding. These drug-bonding sites very likely represent binding at at least two A-protein-induced bending sites. Significantly, the locus of bending at these sites is spaced approximately two helical turns apart, and the bending is proposed to occur by narrowing of the minor groove of DNA. The intervening minor groove between these two peripheral sites is protected from (+)-CC-1065 alkylation. The results are discussed in reference to a proposed model for overall DNA bending in the A-protein att L3 site complex. This study illustrates the utility of (+)-CC-1065 as a probe for protein-induced bending of DNA, as well as for interactions of minor groove DNA bending proteins with DNA which may be masked in hydroxyl radical footprinting experiments.
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Affiliation(s)
- Z M Ding
- Department of Microbiology, College of Pharmacy, University of Texas at Austin 78712-1074
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Ding ZM, Hurley LH. DNA interstrand cross-linking, DNA sequence specificity, and induced conformational changes produced by a dimeric analog of (+)-CC-1065. Anticancer Drug Des 1991; 6:427-52. [PMID: 1662513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
U-77779 is a symmetrical dimer of the spirocyclopropyl alkylating subunit of (+)-CC-1065 in which the linker consists of two indole subunits separated by a ureido group. This compound was synthesized by scientists of the Upjohn Company and was found to be more active in both anti-tumor efficacy and cytotoxicity than its mono-alkylating analogs. Using three different 21-base pair DNA duplexes containing U-77779 reactive sequences, we have shown that U-77779 produces a stable interstrand cross-linked species that loses its internal self complementarity. A comparison of U-77779 with the mono-alkylating analogs of (+)-CC-1065 shows that it appears to have an increased sequence selectivity such that, while mono-alkylating compounds like (+)-CC-1065 react at more than one site, U-77779 reacts only at sites where there are two suitably positioned alkylation sites. Chemical footprinting with 1,10-phenanthroline-copper complex revealed a six base pair cross-linked region between the two covalently modified adenines with modulated cleavage outside this region. In the case of hydroxyl radical footprinting, considerable variability of the extent of cleavage within the cross-linked sequence was found. These results are discussed in terms of likely induced conformational changes in DNA. In contrast to (+)-CC-1065, non-denaturing gel electrophoresis did not reveal any net bending of DNA due to U-77779, which we believe is due to the 180 degrees out-of-phase bending produced on opposite strands of DNA by the cross-linker.
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Affiliation(s)
- Z M Ding
- Drug Dynamics Institute, College of Pharmacy, University of Texas, Austin 78712
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Lin D, Liou MK, Ding ZM. Pion-proton bremsstrahlung calculation and the "experimental" magnetic moment of Delta ++(1232). Phys Rev C Nucl Phys 1991; 44:1819-1843. [PMID: 9967603 DOI: 10.1103/physrevc.44.1819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Ding ZM, Lin D, Liou MK. Special two-energy-two-angle approximation for bremsstrahlung. Phys Rev C Nucl Phys 1989; 40:1291-1307. [PMID: 9966104 DOI: 10.1103/physrevc.40.1291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Ding ZM, Liu YG. [Effects of phosphoramidothiolate pesticides on rat erythrocyte membrane acetylcholinesterase]. Zhonghua Yu Fang Yi Xue Za Zhi 1988; 22:82-4. [PMID: 3215088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Liou MK, Ding ZM. Theory of bremsstrahlung amplitudes in the soft-photon approximation. Phys Rev C Nucl Phys 1987; 35:651-666. [PMID: 9953810 DOI: 10.1103/physrevc.35.651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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