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505522 occurrences (No.25 in the rank) during 5 years in the PubMed. [cache]

421) Local drug delivery strategies based on nanoparticles, gels, polymeric films, rods and wafers are increasingly used in cancer chemotherapy in order to enhance therapeutic effect and reduce systemic toxicity.

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PMID:24274583 DOI:10.3109/03639045.2013.861480

2015 Drug development and industrial pharmacy

* Antitumor activity of TNF-α after intratumoral injection using an in situ thermosensitive hydrogel.

- Local drug delivery strategies based on nanoparticles, gels, polymeric films, rods and wafers are increasingly used in cancer chemotherapy in order to enhance therapeutic effect and reduce systemic toxicity. Herein, a biodegradable and biocompatible in situ thermosensitive hydrogel was designed and employed to deliver tumor necrosis factor-α (TNF-α) locally by intratumoral injection. The triblock copolymer was synthesized by ring-opening polymerization (ROP) of β-butyrolactone (β-BL) and lactide (LA) in bulk using polyethylene glycol (PEG) as an initiator and Sn(Oct)2 as the catalyst, the polymer was characterized by NMR, gel permeation chromatography and differential scanning calorimetry. Blood and tumor pharmacokinetics and in vivo antitumor activity of TNF-α after intratumoral administration in hydrogel or solution with the same dose were evaluated on S180 tumor-bearing mice. Compared with TNF-α solution, TNF-α hydrogel exhibited a longer T1/2 (4-fold) and higher AUCtumor (19-fold), but Cmax was lower (0.5-fold), which means that the hydrogel formulation improved the efficacy with a lower systhemic exposure than the solution formation. In addition, TNF-α hydrogel improved the antitumor activity and survival due to lower systemic exposure than the solution. These results demonstrate that the in situ thermosensitive hydrogel-based local delivery system by intratumoral injection is well suited for the administration of TNF-α.

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[frequency of next (right) word to cancer]

(1)65 null	(14)6 therapy	(27)3 of	(40)2 epigenetics
(2)48 cells	(15)6 tissues	(28)3 patients,	(41)2 growth
(3)33 and	(16)5 cells,	(29)3 research	(42)2 initiation
(4)32 cell	(17)5 progression	(30)3 was	(43)2 prevention
(5)23 patients	(18)5 registries	(31)2 (GC)	(44)2 registry
(6)15 in	(19)4 at	(32)2 biology	(45)2 study
(7)14 is	(20)4 deaths	(33)2 but	(46)2 susceptibility
(8)12 risk	(21)4 has	(34)2 can	(47)2 than
(9)12 screening	(22)4 mortality	(35)2 care	(48)2 treated
(10)12 stem	(23)3 (CRC)	(36)2 development	(49)2 treatment
(11)9 survivors	(24)3 as	(37)2 diagnostic	(50)2 using
(12)7 with	(25)3 cases	(38)2 drug
(13)6 are	(26)3 metabolism	(39)2 drugs

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--- WordNet output for cancer --- =>【病名】がん, 悪性腫瘍(しゅよう), がん腫, 社会悪, 癌 Overview of noun cancer The noun cancer has 5 senses (first 1 from tagged texts) 1. (15) cancer, malignant neoplastic disease -- (any malignant growth or tumor caused by abnormal and uncontrolled cell division; it may spread to other parts of the body through the lymphatic system or the blood stream) 2. Cancer, Crab -- ((astrology) a person who is born while the sun is in Cancer) 3. Cancer -- (a small zodiacal constellation in the northern hemisphere; between Leo and Gemini) 4. Cancer, Cancer the Crab, Crab -- (the fourth sign of the zodiac; the sun is in this sign from about June 21 to July 22) 5. Cancer, genus Cancer -- (type genus of the family Cancridae) --- WordNet end ---