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1.
Braz. j. med. biol. res ; 52(9): e8935, 2019. graf
Article in English | LILACS | ID: biblio-1019568

ABSTRACT

The scientific publication landscape is changing quickly, with an enormous increase in options and models. Articles can be published in a complex variety of journals that differ in their presentation format (online-only or in-print), editorial organizations that maintain them (commercial and/or society-based), editorial handling (academic or professional editors), editorial board composition (academic or professional), payment options to cover editorial costs (open access or pay-to-read), indexation, visibility, branding, and other aspects. Additionally, online submissions of non-revised versions of manuscripts prior to seeking publication in a peer-reviewed journal (a practice known as pre-printing) are a growing trend in biological sciences. In this changing landscape, researchers in biochemistry and molecular biology must re-think their priorities in terms of scientific output dissemination. The evaluation processes and institutional funding for scientific publications should also be revised accordingly. This article presents the results of discussions within the Department of Biochemistry, University of São Paulo, on this subject.


Subject(s)
Humans , Periodicals as Topic/statistics & numerical data , Publishing/trends , Research , Biochemistry , Molecular Biology , Periodicals as Topic/standards , Periodicals as Topic/trends , Brazil
2.
Braz. j. phys. ther. (Impr.) ; 8(1): 21-27, jan.-abr. 2004.
Article in Portuguese | LILACS | ID: lil-384515

ABSTRACT

O objetivo deste estudo foi avaliar o conteudo de glicogenio (GLI) dos musculos soleo (S) e gastrocnemios brancos (GB) e vermelho (GV) normais e desnervados, as concentracoes plasmaticas de glicose, acidos graxos livres (AGL) e lactato, alem do peso muscular de ratos machos, submetidos a estimulacao eletrica (EE) percutanea (f=10 Hz; i=5 mA; fase= 3 ms, 20 min/dia, por 30 dias alternados) associada ou nao a metformia (MET, 1,4mg.ml-1). A glicemia e o AGL foram determinados por testes laboratoriais e o GLI, pelo metodo fenol sulfurico. Para analise estatistica foi fixado o nivel critico de 5(por cento p<0,05). A desnervacao reduz 40,91(por cento) o GLI no S,60,61(por cento) no GV e 38,77(por cento) no GB. O tratamento isolado com MET promoveu elevacao de 250(por cento)no S controle (C) e 34,61(por cento) no S desnervado (D); 184,61(por cento) no GVC e 91,30(por cento) no GVD; e 226,53(por cento) no GBC e 166,66(por cento) no GBD. Por sua vez, a EE elevou em 111,36(por cento) o GLI no SC e 103,84(por cento) no SD; 41,54(por cento) no GVC e 147,83(por cento) no GVD; 114,28(por cento) no GBC e 153,33(por cento) no GBD. O tratamento associado (MET+EE) promoveu elevacao de 279,54(por cento) no SC e 150(por cento) no SD; 184,61(por cento) no GVC e 165,22(por cento) no GVD; 285,71(por cento) no GBC e 163,33(por cento) no GBD. A desnervacao promoveu reducao de 43,73(por cento) na massa muscular do S. Observou-se que nao houve alteracoes nas concentracoes plasmaticas de glicose, AGL e lactato. O estudo mostra que tanto a EE quanto a MET mantem o perfil metabolico dos musculos analisados, no entanto, nao foram suficientes para impedir a perda de massa muscular


Subject(s)
Electric Stimulation , Glycogen , Metformin
3.
Braz. j. med. biol. res ; 33(10): 1133-40, Oct. 2000. ilus
Article in English | LILACS | ID: lil-270216

ABSTRACT

This article reviews recent results of studies aiming to elucidate modes of integrating signals initiated in ACTH receptors and FGF2 receptors, within the network system of signal transduction found in Y1 adrenocortical cells. These modes of signal integration should be central to the mechanisms underlying the regulation of the G0->G1->S transition in the adrenal cell cycle. FGF2 elicits a strong mitogenic response in G0/G1-arrested Y1 adrenocortical cells, that includes a) rapid and transient activation of extracellular signal-regulated kinases-mitogen-activated protein kinases (ERK-MAPK) (2 to 10 min), b) transcription activation of c-fos, c-jun and c-myc genes (10 to 30 min), c) induction of c-Fos and c-Myc proteins by 1 h and cyclin D1 protein by 5 h, and d) onset of DNA synthesis stimulation within 8 h. ACTH, itself a weak mitogen, interacts with FGF2 in a complex manner, blocking the FGF2 mitogenic response during the early and middle G1 phase, keeping ERK-MAPK activation and c-Fos and cyclin D1 induction at maximal levels, but post-transcriptionally inhibiting c-Myc expression. c-Fos and c-Jun proteins are mediators in both the strong and the weak mitogenic responses respectively triggered by FGF2 and ACTH. Induction of c-Fos and stimulation of DNA synthesis by ACTH are independent of PKA and are inhibited by the PKC inhibitor GF109203X. In addition, ACTH is a poor activator of ERK-MAPK, but c-Fos induction and DNA synthesis stimulation by ACTH are strongly inhibited by the inhibitor of MEK1 PD98059.


Subject(s)
Humans , Animals , Adrenal Cortex/cytology , Receptors, Corticotropin/physiology , Signal Transduction/physiology , Adrenal Cortex Neoplasms , Cell Cycle/physiology , Mitogen-Activated Protein Kinase Kinases/metabolism , Protein Kinase C/metabolism , Receptors, Fibroblast Growth Factor/physiology , Tumor Cells, Cultured/physiology
4.
Arq. neuropsiquiatr ; 49(2): 222-4, jun. 1991. tab
Article in Portuguese | LILACS | ID: lil-102781

ABSTRACT

Apresentaçäo de caso de paciente diabético de longa data, com crises parciais motoras desencadeadas por movimentaçäo passiva do membro superior direito. Esteé o objetivo do relato, pois trata-se de tipo raro de crise, quando comparado às crises parciais espontâneas em pacientes diabéticos. Frequentemente, crises parciais säo manifestaçäo inicial de diabetes mellitus (cerca de 19%) dos casos registrados). Neste caso, como nos da literatura, o controle das crises foi obtido com a normalizaçäo dos níveis séricos de glicose. Säo discutidos da provável fisiopatologia


Subject(s)
Humans , Male , Aged , Epilepsy, Temporal Lobe/etiology , Hyperglycemic Hyperosmolar Nonketotic Coma/complications , Blood Glucose/analysis , Epilepsy, Temporal Lobe/prevention & control
5.
Arq. neuropsiquiatr ; 42(4): 356-61, 1984.
Article in Portuguese | LILACS | ID: lil-23669

ABSTRACT

Foram estudados atraves de exame eletromiografico os efeitos dos gangliosideos do cortex cerebral em 15 pacientes com neuropatia periferica, divididos em dois grupos A (etiologia alcoolica) e D (etiologia diabetica). Apos 20 dias de administracao por via intramuscular (20 mg/dia) do farmaco foi verificado: 1) que houve aumento discreto da velocidade de conducao motora nos pacientes do grupo A; 2) que a velocidade de conducao sensitiva nao se alterou em qualquer dos grupos e para o total dos pacientes observados; 3) resposta favoravel a terapeutica (avaliacao global) em tres dos 7 pacientes do grupo A, em tres dos 8 pacientes do grupo D e, portanto, em 40% do total de pacientes estudados.Os autores sugerem administracao do farmaco por tempo mais prolongado, em pacientes hospitalizados e submetido a avaliacao eletromiografica periodica, para verificar a eventual atuacao terapeutica do medicamento


Subject(s)
Adult , Middle Aged , Humans , Male , Female , Electromyography , Gangliosides , Neural Conduction , Peripheral Nervous System Diseases
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