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928965 occurrences (No.3 in the rank) during 5 years in the PubMed. [no cache] 500 found

268) Primary human hepatocytes represent an important cell source for in vitro investigation of hepatic drug metabolism and disposition.

--- ABSTRACT ---

PMID:23165723 DOI:10.1002/term.1652

2015 Journal of tissue engineering and regenerative medicine

* Serum-free culture of primary human hepatocytes in a miniaturized hollow-fibre membrane bioreactor for pharmacological in vitro studies.

- Primary human hepatocytes represent an important cell source for in vitro investigation of hepatic drug metabolism and disposition. In this study, a multi-compartment capillary membrane-based bioreactor technology for three-dimensional (3D) perfusion culture was further developed and miniaturized to a volume of less than 0.5 ml to reduce demand for cells. The miniaturized bioreactor was composed of two capillary layers, each made of alternately arranged oxygen and medium capillaries serving as a 3D culture for the cells. Metabolic activity and stability of primary human hepatocytes was studied in this bioreactor in the presence of 2.5% fetal calf serum (FCS) under serum-free conditions over a culture period of 10 days. The miniaturized bioreactor showed functions comparable to previously reported data for larger variants. Glucose and lactate metabolism, urea production, albumin synthesis and release of intracellular enzymes (AST, ALT, GLDH) showed no significant differences between serum-free and serum-supplemented bioreactors. Activities of human-relevant cytochrome P450 (CYP) isoenzymes (CYP1A2, CYP3A4/5, CYP2C9, CYP2D6, CYP2B6) analyzed by determination of product formation rates from selective probe substrates were also comparable in both groups. Gene expression analysis showed moderately higher expression in the majority of CYP enzymes, transport proteins and enzymes of Phase II metabolism in the serum-free bioreactors compared to those maintained with FCS. In conclusion, the miniaturized bioreactor maintained stable function over the investigated period and thus provides a suitable system for pharmacological studies on primary human hepatocytes under defined serum-free conditions.

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(1)30 lines	(19)5 tumour	(37)3 migration	(55)2 lymphoma,
(2)16 death	(20)4 (RBC)	(38)3 response	(56)2 matrices
(3)15 proliferation	(21)4 growth	(39)3 scaffolds	(57)2 numbers
(4)15 viability	(22)4 markers	(40)3 source	(58)2 of
(5)13 lymphoma	(23)4 nuclear	(41)3 tumors	(59)2 printing
(6)12 and	(24)4 phenotype	(42)3 type	(60)2 responses
(7)9 carcinoma	(25)4 populations	(43)3 viability,	(61)2 seeding
(8)9 culture	(26)4 therapies	(44)2 activation	(62)2 survival
(9)9 sheets	(27)3 adhesion,	(45)2 aggregation	(63)2 system
(10)9 transplantation	(28)3 division	(46)2 attachment	(64)2 that
(11)9 types	(29)3 energy	(47)2 biology	(65)2 therapy,
(12)8 adhesion	(30)3 expansion	(48)2 coating,	(66)2 to
(13)8 cycle	(31)3 growth,	(49)2 death,	(67)2 transplantation,
(14)8 therapy	(32)3 immunity	(50)2 density	(68)2 tumours
(15)7 differentiation	(33)3 infiltration	(51)2 factors	(69)2 types,
(16)7 proliferation,	(34)3 line,	(52)2 genes	(70)2 volume
(17)6 surface	(35)3 lines,	(53)2 interactions	(71)2 wall
(18)5 line	(36)3 lung	(54)2 invasion	(72)2 was

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--- WordNet output for cell --- =>密室, 細胞, 電池, 独房・細胞, 監房, 組織, 独房 Overview of noun cell The noun cell has 7 senses (first 3 from tagged texts) 1. (71) cell -- (any small compartment; "the cells of a honeycomb") 2. (44) cell -- ((biology) the basic structural and functional unit of all organisms; they may exist as independent units of life (as in monads) or may form colonies or tissues as in higher plants and animals) 3. (1) cell, electric cell -- (a device that delivers an electric current as the result of a chemical reaction) 4. cell, cadre -- (a small unit serving as part of or as the nucleus of a larger political movement) 5. cellular telephone, cellular phone, cellphone, cell, mobile phone -- (a hand-held mobile radiotelephone for use in an area divided into small sections, each with its own short-range transmitter/receiver) 6. cell, cubicle -- (small room in which a monk or nun lives) 7. cell, jail cell, prison cell -- (a room where a prisoner is kept) --- WordNet end ---