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return kwic search for provide out of >500 occurrences
325270 occurrences (No.61 in the rank) during 5 years in the PubMed. [no cache] 500 found

321) Our results might provide guidance for the optimization of transfection efficiency and the industrial production of recombinant proteins.

--- ABSTRACT ---

PMID:24166598 DOI:10.1007/s10616-013-9658-z

2015 Cytotechnology

* Salt ions and related parameters affect PEI-DNA particle size and transfection efficiency in Chinese hamster ovary cells.

- Transfection efficiency is directly associated with the expression level and quantity of recombinant protein after the transient transfection of animal cells. The transfection process can be influenced by many still-unknown factors, so it is valuable to study the precise mechanism and explore these factors in gene delivery. Polyethylenimine (PEI) is considered to have high transfection efficiency and endosome-disrupting capacity. Here we aimed to investigate optimal conditions for transfection efficiency by setting different parameters, including salt ion concentration, DNA/PEI ratio, and incubation time. We examined the PEI-DNA particle size using a Malvern particle size analyzer and assessed the transfection efficiency using flow cytometry in Chinese hamster ovary-S cells. Salt ions, higher amounts of PEI tended to improve the aggregation of PEI-DNA particles and the particle size of PEI-DNA complexes and the transfection efficiency were increased. Besides, the particle size was also found to benefit from longer incubation time. However, the transfection efficiency increased to maximum of 68.92 % at an incubation time of 10 min, but decreased significantly thereafter to 23.71 %, when incubating for 120 min (P < 0.05). Besides, PEI-DNA complexes formed in salt-free condition were unstable. Our results suggest DNA and PEI incubated in 300 mM NaCl at a ratio of 1:4 for 10 min could achieve the optimal transfection efficiency. Our results might provide guidance for the optimization of transfection efficiency and the industrial production of recombinant proteins.

--- ABSTRACT END ---

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[frequency of next (right) word to provide]

(1)109 a	(12)6 insight	(23)3 care	(34)2 effective
(2)39 an	(13)6 recommendations	(24)3 direct	(35)2 first
(3)32 the	(14)5 reliable	(25)3 guidance	(36)2 for
(4)25 evidence	(15)5 them	(26)3 novel	(37)2 good
(5)14 useful	(16)4 information	(27)3 preliminary	(38)2 greater
(6)13 new	(17)4 insights	(28)2 accurate	(39)2 methodological
(7)8 more	(18)4 such	(29)2 additional	(40)2 one
(8)7 rather	(19)4 us	(30)2 analytical	(41)2 some
(9)7 support	(20)4 valuable	(31)2 answers	(42)2 sufficient
(10)6 further	(21)3 adequate	(32)2 basic	(43)2 to
(11)6 important	(22)3 better	(33)2 clinically

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--- WordNet output for provide --- =>供給する, 与える, 規定する, 条件とする, 準備する, 用意する, 扶養する, 援助する Overview of verb provide The verb provide has 7 senses (first 4 from tagged texts) 1. (270) supply, provide, render, furnish -- (give something useful or necessary to; "We provided the room with an electrical heater") 2. (25) provide, supply, ply, cater -- (give what is desired or needed, especially support, food or sustenance; "The hostess provided lunch for all the guests") 3. (14) provide -- (determine (what is to happen in certain contingencies), especially by including a proviso condition or stipulation; "The will provides that each child should receive half of the money"; "The Constitution provides for the right to free speech") 4. (2) put up, provide, offer -- (mount or put up; "put up a good fight"; "offer resistance") 5. leave, allow for, allow, provide -- (make a possibility or provide opportunity for; permit to be attainable or cause to remain; "This leaves no room for improvement"; "The evidence allows only one conclusion"; "allow for mistakes"; "leave lots of time for the trip"; "This procedure provides for lots of leeway") 6. provide, bring home the bacon -- (supply means of subsistence; earn a living; "He provides for his large family by working three jobs"; "Women nowadays not only take care of the household but also bring home the bacon") 7. provide -- (take measures in preparation for; "provide for the proper care of the passengers on the cruise ship") --- WordNet end ---