Pig pituitary glands were extracted with 70% acetone at pH 1.1, acetone was added to a concentration of 92 %, and the resulting 70-92 % acetone precipitate was dissolved in 0.1 N acetic acid and adsorbed with oxycellulose to remove adrenocorticotropin and melanocyte-stimulating hormones. To the unadsorbed supernatant solution, trichloroacetic acid was then added to a concentration of 5%. The resulting 5 % trichloroacetic acid precipitate (labeled fraction 7) possesses lipolytic activity in vitro on rabbit, guinea pig, chicken, and pigeon adipose tissue, and raises plasma free fatty acid concentration in the anesthetized monkey. By gel filtration of fraction 7 on Sephadex G-75, followed by ionexchange chromatography on carboxymethylcellulose, two lipolytic peptides (labeled peptides 7D6 and 7D7) were isolated in homogeneous form. Peptide 7D6 in the amount recovered accounted for about 60 of the lipolytic activity of fraction 7, and peptide 7D7 for about 20%. The minimal effective dose for the lipolytic activity of 7D6 on rabbit D uring the past 10 years, three laboratories have reported on novel pituitary peptides which are highly active lipolytic agents on rabbit adipose tissue, but virtually inactive on the rat tissue. (1) This laboratory described a fraction of pig pituitary, labeled fraction H (Rudman et al., 1960), and, in more purified form, fraction L (Rudman et al., 1961), which was lipolytic in vitro and in vivo in the rabbit but not in the rat, These preparations were weakly active on guinea pig adipose tissue, but inactive on the tissues of mouse, hamster, dog, and pig (Rudman et al., 1962). (2) Astwood and collaborators (Astwood et al., 1961) isolated from pig pituitaries two peptides labeled I and 11, both of which were active on the rabbit but not on the rat tissue. Peptide I1 was found by electrophoretic and immunologic tests to be identical with the major component in fraction H (Friesen et al., 1962). (3) Li and colleagues have isolated three novel lipolytic peptides from sheep, pig, and human pituitaries, labeled fraction L' (Birk and Li, 1964), P-lipotropin (Li et al., 1965; Graf and Cseh, 1968; Cseh et al., 1968), and y-lipotropin (Chretien and Li, 1967), all highly active on rabbit adipose tissue but only weakly so on the rat tissue. 1 Abbreviations used are: ACTH, adrenocorticotropin; MSH, FR-39.adipose tissue in vitro was 0.1 pg/ml, and of 7D7 0.01 pg/ml. Both peptides were active as well on the adipose tissue of guinea pig and chicken, and inactive on that of rat, hamster, cat, and opossum. As little as 0.01 mg of 7D6 increased the plasma free fatty acid concentration in the intact rabbit, and as little as 2.5 mg had this effect in the monkey. The rise in plasma free fatty acid level was associated with an increase in blood glucose concentration and a fall in plasma total amino acid level. Molecular weight of 7D6 was estimated by sedimentation equilibrium as 8900, and that of 7D7 as 5500. The differing amino acid compositions of 7D6 and 7D7 are reported.Peptide 7D6, porcine fraction L, and ...
In order to study the association of histological grade (HG) with specific clinical and biological parameters which may influence the clinical behavior of infiltrating ductal carcinomas of the breast (IDC), we analyzed in 229 tissue samples the cytosolic concentrations of estrogen receptor (ER), progesterone receptor (PR), pS2, cathepsin D, hyaluronic acid (HA) and tissue-type plasminogen activator (t-PA), as well as those of the erbB2 oncoprotein, epidermal growth factor receptor (EGFR), HA, CD44v5 and CD44v6 in the cell membrane fraction. Likewise, we considered size, ploidy, S-phase fraction and axillary node involvement as variables of the study. The transition from HG1 to HG2 and from HG2 to HG3 was accompanied by a number of common features: global increase in size, greater number of tumors >2.0 cm, decrease in membrane hyaluronic acid concentrations, increased cell proliferation (S-phase >7%) and greater aneuploidy. Other events observed during the transition from HG2 to HG3 were a decrease in ER, PR, t-PA and cytosolic hyaluronic acid. These results led us to consider that HG is associated with certain clinical-biological changes that may help explain its value as a prognostic factor in breast carcinomas.
No abstract
Meu pastor, meu caminho, minha luz e força...a FÉ, que sem ela nada conquistaria...AGRADEÇO." Aos meus pais, pelo amor e apoio incondicional e especialmente pelo incentivo de minha mãe. A memória de meu avô, a presença marcante de minha avó e tia, e ao carinho de meu irmão DEDICO AGRADECIMENTOS À ESALQ -USP pelo suporte como instituição e todos os apoios fornecidos e, ao CNPq pela concessão da bolsa de estudo...(desde a Iniciação Cientifica), ambos foram fundamentais a realização deste trabalho. Ao Prof. Dr. Luiz Gonzaga do Prado Filho, pela orientação e oportunidade. Ao Dr. Luiz Humberto Gomes pelo apoio, incentivo, amizade, carinho e, acima de tudo pelos enriquecedores ensinamentos e pelo despertar a pesquisa. Ao Prof. Flavio C. A. Tavares pela oportunidade de trabalhar em seu laboratório, principalmente na conclusão deste trabalho. Aos Professores do Curso de Pós Graduação, pelo incentivo e ensinamentos e, a Profa. Silvia M. G. Molina pela ajuda nas análises estatísticas. A Profa. Dra. Roberta H.P. Valle e ao Prof. Júlio César Teixeira pelos ensinamentos básicos, pelo incentivo, amizade e modelo de profissionalismo, e a todos da UFLA, onde me formei. Aos amigos que lá conquistei e aos professores pelo incentivo, conhecimento e por acreditarem no potencial de seus alunos. A Dra. Keila M. R. Duarte pelo apoio e auxílio na elaboração deste trabalho, bem como todos os outros pertinentes; Pelas tardes em família, as quais me acolheu em sua casa, e pelo inestimável carinho. Ao Daniel Sarmento e sua mãe, pelo apoio e atenção, principalmente nos momentos difíceis. Aos amigos do laboratório de Genética de Leveduras, e as estagiárias, obrigada pelos cafés da manhã, confraternizações e churrascos e, por compartilharem conhecimento, alegria e o espaço de trabalho, sem esquecer, os conselhos indispensáveis. Aos colegas Funcionários do Departamento de Genética, Margarida (D. Meg), Vitor, Fernando, Macedonio, Valdir e Oberdã obrigada pela atenção e, a Glória pela ajuda e auxílio na revisão bibliográfica. E em especial às amigas Sarah e Giovana, que sempre tiveram grande paciência e carinho. Ao Rock Seille pelo convívio, amizade, carinho e cuidados de irmão mais velho. Pelo apoio nas análises estatísticas e especialmente por tudo que fez nos momentos complicados, minha gratidão, amizade e carinho. Muito Obrigada! A amiga Flávia, sempre presente apesar da distância. A querida Rebeca, que deixou este caminho mais florido, feliz e divertido, meu carinho e amor.... Aos amigos queridos conquistados ao longo destes dois anos, em especial, a Nívea, Ticiane, Lígia, Mônica, Luiz (Viola), Edgard, Maurício, Solange, Jony, Bia, Priscila, Sr. Ferraz pelas farras, companhia e por estarem sempre comigo. E a todos aqueles que não foram nominalmente citados, mas estão presentes de alguma forma neste trabalho e em meu coração, obrigada pelo apoio. E...A minha família e a todos os momentos que deixei de viver com vocês, ao amor que irrestritamente me dedicam e, a suas orações e a Fé. Por acreditarem no meu potencial e por tudo que não consigo e...
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.