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https://www.readbyqxmd.com/read/28516218/a-high-fat-diet-can-affect-bone-healing-in-growing-rats
#1
Jéssica Suzuki Yamanaka, Gabriela Rezende Yanagihara, Bruna Leonel Carlos, Júnia Ramos, Brígida Batista Brancaleon, Ana Paula Macedo, João Paulo Mardegan Issa, Antônio Carlos Shimano
A high-fat diet (HFD) can have a negative effect on bone quality in young and old people. Although bone healing in children is normally efficient, there is no evidence that children who have a diet rich in fat have compromised bone fracture regeneration compared with children with recommended dietary fat levels. The purpose of the present study was to evaluate the effects of an HFD on bone healing in growing female rats. Twenty-six postweaning female Wistar rats were divided into two groups (13 animals per group): a standard diet (SD) group and an HFD (with 60% of energy from fat) group...
May 17, 2017: Journal of Bone and Mineral Metabolism
https://www.readbyqxmd.com/read/28502255/a-moist-edge-environment-aids-the-regeneration-of-traumatic-tympanic-membrane-perforations
#2
Z C Lou, Z H Lou
OBJECTIVE: To review the history of moist therapy used to regenerate traumatic tympanic membrane perforations. STUDY DESIGN: Literature review. METHODS: The literature on topical agents used to treat traumatic tympanic membrane perforations was reviewed, and the advantages and disadvantages of moist therapy were analysed. RESULTS: A total of 76 studies were included in the analysis. Topical applications of certain agents (e...
May 15, 2017: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/28486025/efficacy-and-persistence-of-allogeneic-adipose-derived-mesenchymal-stem-cells-combined-with-hyaluronic-acid-in-osteoarthritis-after-intra-articular-injection-in-a-sheep-model
#3
Chenchen Feng, Xuan Luo, Na He, Huitang Xia, Xiaoteng Lv, Xue Zhang, Dan Li, Fei Wang, Jiaping He, Li Zhang, Xiangming Lin, Liping Lin, Huabin Yin, Jiyin He, Jinwu Wang, Wei Cao, Richard Wang, Guangdong Zhou, Wen Wang
Although a number of studies have reported efficacy of autologous adipose-derived mesenchymal stem cells (AD-MSCs) in treating osteoarthritis (OA), no reliable evidences demonstrate whether allogeneic AD-MSCs can efficiently block OA progression in a large animal model. The current study explored the efficacy and survival of allogeneic AD-MSCs combined with hyaluronic acid (HA) after intra-articular (IA) injection in a sheep OA model, which were conventionally established by anterior cruciate ligament resection and medial meniscectomy...
May 9, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28485389/egfr-dependent-tor-independent-endocycles-support-drosophila-gut-epithelial-regeneration
#4
Jinyi Xiang, Jennifer Bandura, Peng Zhang, Yinhua Jin, Hanna Reuter, Bruce A Edgar
Following gut epithelial damage, epidermal growth factor receptor/mitogen-activated protein kinase (EGFR/MAPK) signalling triggers Drosophila intestinal stem cells to produce enteroblasts (EBs) and enterocytes (ECs) that regenerate the gut. As EBs differentiate into ECs, they become postmitotic, but undergo extensive growth and DNA endoreplication. Here we report that EGFR/RAS/MAPK signalling is required and sufficient to drive damage-induced EB/EC growth. Endoreplication occurs exclusively in EBs and newborn ECs that inherit EGFR and active MAPK from fast-dividing progenitors...
May 9, 2017: Nature Communications
https://www.readbyqxmd.com/read/28480759/gad65-a-prospective-vaccine-for-treating-type-1-diabetes
#5
Johnny Ludvigsson
In spite of modern techniques, the burden for patients with type 1 diabetes (T1D) will not disappear and T1D remains a life-threatening disease causing severe complications and increased mortality. We have to learn how to preserve residual insulin secretion or even increase beta cell regeneration. This would give a milder disease, simpler treatment and perhaps even cure. Thus, there are good reasons to try therapies that may preserve beta cell function. Areas covered: In this review the author reviews the literature and registered ongoing trials using GAD-alum put in relation to the high number of published different immune interventions...
May 6, 2017: Expert Opinion on Biological Therapy
https://www.readbyqxmd.com/read/28480220/culture-of-ipscs-derived-pancreatic-%C3%AE-like-cells-in-vitro-using-decellularized-pancreatic-scaffolds-a-preliminary-trial
#6
Jian Wan, Yan Huang, Pengcheng Zhou, Yibing Guo, Cen Wu, Shajun Zhu, Yao Wang, Lei Wang, Yuhua Lu, Zhiwei Wang
Diabetes mellitus is a disease which has affected 415 million patients in 2015. In an effort to replace the significant demands on transplantation and morbidity associated with transplantation, the production of β-like cells differentiated from induced pluripotent stem cells (iPSCs) was evaluated. This approach is associated with promising decellularized scaffolds with natural extracellular matrix (ECM) and ideal cubic environment that will promote cell growth in vivo. Our efforts focused on combining decellularized rat pancreatic scaffolds with mouse GFP(+)-iPSCs-derived pancreatic β-like cells, to evaluate whether decellularized scaffolds could facilitate the growth and function of β-like cells...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28474557/the-possible-hypoglycemic-mechanisms-of-echinochrome
#7
Ayman Saber Mohamed, Amel Mahmoud Soliman, Mohamed-Assem Said Marie
BACKGROUND: Diabetes mellitus is a main reason of morbidity and mortality worldwide. In recent years great attention has been paid to bioactivity of natural products due to their potential pharmacological utilization. Echinochrome is natural compound isolated from sea urchins and possesses many biological effects. The hypoglycemic activity of echinochrome reported in many recent experiments. OBJECTIVE: In our study, we tried to collect all the possible the hypoglycemic mechanism of echinochrome...
May 5, 2017: Current Diabetes Reviews
https://www.readbyqxmd.com/read/28471324/the-structure-function-relationships-of-insulin-like-growth-factor-1-ec-in-c2c12-cells
#8
Qian Yi, Jianguo Feng, Ling He, Rongxue Wan, Hui Zeng, Li Yang, Shiyong Wu, Liling Tang
Insulin-like growth factor 1 (IGF1) is a crucial growth factor, that regulates skeletal muscles development during cell growth and repair. Recently, its alternative splicing variant, named IGF1Ec, also named mechano-growth factor (MGF), has gained attentions as a new damage repair factor. However, the structure-function relationships of IGF1Ec have not been fully clarified due to contradictory reports. In this study, we systematically investigated physiologic responses of C2C12 muscle cells to IGF1Ec, IGF1 and MGF E peptide...
May 4, 2017: Cell Adhesion & Migration
https://www.readbyqxmd.com/read/28448039/surgical-ablation-assay-for-studying-eye-regeneration-in-planarians
#9
Jacob M Morton, Marwa A Saad, Wendy S Beane
In the study of adult stem cells and regenerative mechanisms, planarian flatworms are a staple in vivo model system. This is due in large part to their abundant pluripotent stem cell population and ability to regenerate all cell and tissue types after injuries that would be catastrophic for most animals. Recently, planarians have gained popularity as a model for eye regeneration. Their ability to regenerate the entire eye (comprised of two tissue types: pigment cells and photoreceptors) allows for the dissection of the mechanisms regulating visual system regeneration...
April 14, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28447755/gene-expression-profile-in-human-induced-pluripotent-stem-cells-chondrogenic-differentiation-in-vitro-part-a
#10
Wiktoria Maria Suchorska, Ewelina Augustyniak, Magdalena Richter, Tomasz Trzeciak
Human induced pluripotent stem cells (hiPSCs) offer promise in regenerative medicine, however more data are required to improve understanding of key aspects of the cell differentiation process, including how specific chondrogenic processes affect the gene expression profile of chondrocyte‑like cells and the relative value of cell differentiation markers. The main aims of the present study were as follows: To determine the gene expression profile of chondrogenic-like cells derived from hiPSCs cultured in mediums conditioned with HC‑402‑05a cells or supplemented with transforming growth factor β3 (TGF‑β3), and to assess the relative utility of the most commonly used chondrogenic markers as indicators of cell differentiation...
May 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28411170/the-critical-role-of-phosphatidylcholine-and-phosphatidylethanolamine-metabolism-in-health-and-disease
#11
REVIEW
Jelske N van der Veen, John P Kennelly, Sereana Wan, Jean E Vance, Dennis E Vance, René L Jacobs
Phosphatidylcholine (PC) and phosphatidylethanolamine (PE) are the most abundant phospholipids in all mammalian cell membranes. In the 1950s, Eugene Kennedy and co-workers performed groundbreaking research that established the general outline of many of the pathways of phospholipid biosynthesis. In recent years, the importance of phospholipid metabolism in regulating lipid, lipoprotein and whole-body energy metabolism has been demonstrated in numerous dietary studies and knockout animal models. The purpose of this review is to highlight the unappreciated impact of phospholipid metabolism on health and disease...
April 11, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28405581/angiogenesis-in-newly-regenerated-bone-by-secretomes-of-human-mesenchymal-stem-cells
#12
Wataru Katagiri, Takamasa Kawai, Masashi Osugi, Yukiko Sugimura-Wakayama, Kohei Sakaguchi, Taku Kojima, Tadaharu Kobayashi
BACKGROUND: For an effective bone graft for reconstruction of the maxillofacial region, an adequate vascular network will be required to supply blood, osteoprogenitor cells, and growth factors. We previously reported that the secretomes of bone marrow-derived mesenchymal stem cells (MSC-CM) contain numerous growth factors such as insulin-like growth factor (IGF)-1, transforming growth factor (TGF)-β1, and vascular endothelial growth factor (VEGF), which can affect the cellular characteristics and behavior of regenerating bone cells...
December 2017: Maxillofacial Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28385600/mesenchymal-stem-cells-and-differentiated-insulin-producing-cells-are-new-horizons-for-pancreatic-regeneration-in-type-i-diabetes-mellitus
#13
Ayat M Domouky, Ashraf S Hegab, Amal Al-Shahat, Nermin Raafat
BACKGROUND: Diabetes mellitus has become the third human killer following cancer and cardiovascular disease. Millions of patients, often children, suffer from type 1 diabetes (T1D). Stem cells created hopes to regenerate damaged body tissues and restore their function. AIM: This work aimed at clarifying and comparing the therapeutic potential of differentiated and non-differentiated mesenchymal stem cells (MSCs) as a new line of therapy for T1D. METHODS: 40 Female albino rats divided into group I (control): 10 rats and group II (diabetic), III and IV, 10 rats in each, were injected with streptozotocin (50mg/kg body weight)...
April 3, 2017: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/28380670/improved-regeneration-and-de-novo-bone-formation-in-a-diabetic-zebrafish-model-treated-with-paricalcitol-and-cinacalcet
#14
Filipe R Carvalho, Ana R Fernandes, M Leonor Cancela, Paulo J Gavaia
Bone changes related to diabetes have been well stablished, but few strategies have been developed to prevent this growing health problem. In our work, we propose to investigate the effects of calcitriol as well as of a vitamin D analog (paricalcitol) and a calcimimetic (cinacalcet), in fin regeneration and de novo mineralization in a zebrafish model of diabetes. Following exposure of diabetic transgenic Tg(ins:nfsb-mCherry) zebrafish to calcitriol, paricalcitol and cinacalcet, caudal fins were amputated to assess their effects on tissue regeneration...
April 5, 2017: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/28380380/virgin-beta-cells-persist-throughout-life-at-a-neogenic-niche-within-pancreatic-islets
#15
Talitha van der Meulen, Alex M Mawla, Michael R DiGruccio, Michael W Adams, Vera Nies, Sophie Dólleman, Siming Liu, Amanda M Ackermann, Elena Cáceres, Anna E Hunter, Klaus H Kaestner, Cynthia J Donaldson, Mark O Huising
Postnatal maintenance or regeneration of pancreatic beta cells is considered to occur exclusively via the replication of existing beta cells, but clinically meaningful restoration of human beta cell mass by proliferation has never been achieved. We discovered a population of immature beta cells that is present throughout life and forms from non-beta precursors at a specialized micro-environment or "neogenic niche" at the islet periphery. These cells express insulin, but lack other key beta cell markers, and are transcriptionally immature, incapable of sensing glucose, and unable to support calcium influx...
April 4, 2017: Cell Metabolism
https://www.readbyqxmd.com/read/28375156/%C3%AF-3-polyunsaturated-fatty-acids-ameliorate-type-1-diabetes-and-autoimmunity
#16
Xinyun Bi, Fanghong Li, Shanshan Liu, Yan Jin, Xin Zhang, Tao Yang, Yifan Dai, Xiaoxi Li, Allan Zijian Zhao
Despite the benefit of insulin, blockade of autoimmune attack and regeneration of pancreatic islets are ultimate goals for the complete cure of type 1 diabetes (T1D). Long-term consumption of ω-3 polyunsaturated fatty acids (PUFAs) is known to suppress inflammatory processes, making these fatty acids candidates for the prevention and amelioration of autoimmune diseases. Here, we explored the preventative and therapeutic effects of ω-3 PUFAs on T1D. In NOD mice, dietary intervention with ω-3 PUFAs sharply reduced the incidence of T1D, modulated the differentiation of Th cells and Tregs, and decreased the levels of IFN-γ, IL-17, IL-6, and TNF-α...
May 1, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28359314/alpinia-oxyphylla-miq-fruit-extract-activates-igfr-pi3k-akt-signaling-to-induce-schwann-cell-proliferation-and-sciatic-nerve-regeneration
#17
Yung-Ming Chang, Hen-Hong Chang, Chin-Chuan Tsai, Hung-Jen Lin, Tsung-Jung Ho, Chi-Xin Ye, Ping-Ling Chiu, Yueh-Sheng Chen, Ray-Jade Chen, Chih-Yang Huang, Chien-Chung Lin
BACKGROUND: It is known that the medicinal herb Alpinia oxyphylla Miq. is widely used as a remedy for diarrhea as well as the symptoms accompanying hypertension and cerebrovascular disorders. Moreover, it has also been reported that Alpinia oxyphylla Miq. has beneficial effects on anti-senescence and neuro-protection. This study focuses on the molecular mechanisms by which the Alpinia oxyphylla Miq. fruits promote neuron regeneration. METHODS: A piece of silicone rubber was guided across a 15 mm gap in the sciatic nerve of a rat...
March 31, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28348115/decrease-in-ins-glut2-lo-%C3%AE-cells-with-advancing-age-in-mouse-and-human-pancreas
#18
Christine A Beamish, Sofia Mehta, Brenda J Strutt, Subrata Chakrabarti, Manami Hara, David J Hill
The presence and location of resident pancreatic β-cell progenitors is controversial. A subpopulation of insulin-expressing but glucose transporter-2-low (Ins(+)Glut2(LO)) cells may represent multipotent pancreatic progenitors in adult mouse and in human islets, and they are enriched in small, extra-islet β-cell clusters (<5 β cells) in mice. Here, we sought to identify and compare the ontogeny of these cells in mouse and human pancreata throughout life. Mouse pancreata were collected at postnatal days 7, 14, 21, 28, and at 3, 6, 12, and 18 months of age, and in the first 28 days after β-cell mass depletion following streptozotocin (STZ) administration...
June 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28336399/synthetic-matrix-of-polyether-polyurethane-as-a-biological-platform-for-pancreatic-regeneration
#19
Luciana Xavier Pereira, Celso Tarso Rodrigues Viana, Laura Alejandra Ariza Orellano, Simone Aparecida Almeida, Anilton Cesar Vasconcelos, Alfredo de Miranda Goes, Alexander Birbrair, Silvia Passos Andrade, Paula Peixoto Campos
AIMS: Several alternative cellular approaches using biomaterials to host insulin-producing cells derived from stem cells have been developed to overcome the limitations of type 1 diabetes treatment (exogenous insulin injection). However, none seem to fulfill all requirements needed to induce pancreatic cells successful colonization of the scaffolds. Here, we report a polymeric platform adherent to the native mice pancreas filled with human adipose stem cells (hASCs) that was able to induce growth of pancreatic parenchyma...
May 1, 2017: Life Sciences
https://www.readbyqxmd.com/read/28324014/variation-in-the-insulin-like-growth-factor-1-gene-in-primates
#20
Peter Rotwein
Insulin-like growth factor 1 (IGF1) is a multifunctional peptide that is involved in a wide range of physiological and pathophysiological processes in many animal species, ranging from somatic growth in children to metabolism and tissue regeneration and repair in adults. The IGF1 gene is under multifactorial regulation in the few species in which it has been studied, with major control being exerted by growth hormone through a gene expression pathway involving inducible binding of the STAT5b transcription factor to dispersed enhancer elements...
April 1, 2017: Endocrinology
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