Evidence map›Paper›PMID 18591268›Full record

ArticleAntimicrobial agents and chemotherapy2008

Intracellular time course, pharmacokinetics, and biodistribution of isoniazid and rifabutin following pulmonary delivery of inhalable microparticles to mice.

Rahul Kumar Verma, Jatinder Kaur, Kaushlendra Kumar, Awadh Bihari Yadav, Amit Misra

Open access · greenAbstract read
In one paragraph

Article in Antimicrobial agents and chemotherapy, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed
3.5field-weighted citation impact, top 8% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

26 citing papers in PubMed, 94 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 1 institution in 1 country.

Rahul Kumar VermaPharmaceutics Division, Central Drug Research Institute, Chhattar Manzil Palace, Lucknow, India.
Jatinder Kaur
Kaushlendra Kumar
Awadh Bihari Yadav
Amit Misra
Central Drug Research Institute · IN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Intracellular concentrations of isoniazid and rifabutin resulting from administration of inhalable microparticles of these drugs to phorbol-differentiated THP-1 cells and the pharmacokinetics and biodistribution of these drugs upon inhalation of microparticles or intravenous administration of free drugs to mice were investigated. In cultured cells, both microparticles and dissolved drugs established peak concentrations of isoniazid ( approximately 1.4 and 1.1 microg/10(6) cells) and rifabutin ( approximately 2 microg/ml and approximately 1.4 microg/10(6) cells) within 10 min. Microparticles maintained the intracellular concentration of isoniazid for 24 h and rifabutin for 96 h, whereas dissolved drugs did not. The following pharmacokinetic parameters were calculated using WinNonlin from samples obtained after inhalation using an in-house apparatus (figures in parentheses refer to parameters obtained after intravenous administration of an equivalent amount, i.e., 100 microg of either drug, to parallel groups): isoniazid, serum half-life (t(1/2)) = 18.63 +/- 5.89 h (3.91 +/- 1.06 h), maximum concentration in serum (C(max)) = 2.37 +/- 0.23 microg x ml(-1) (3.24 +/- 0.57 microg x ml(-1)), area under the concentration-time curve from 0 to 24 h (AUC(0-24)) = 55.34 +/- 13.72 microg/ml(-1) h(-1) (16.64 +/- 1.80 microg/ml(-1) h(-1)), and clearance (CL) = 63.90 +/- 13.32 ml x h(-1) (4.43 +/- 1.85 ml x h(-1)); rifabutin, t(1/2) = 119.49 +/- 29.62 h (20.18 +/- 4.02 h), C(max) = 1.59 +/- 0.01 microg x ml(-1) (3.47 +/- 0.33 microg x ml(-1)), AUC(0-96) = 109.35 +/- 14.78 microg/ml(-1) h(-1) (90.82 +/- 7.46 microg/ml(-1) h(-1)), and CL = 11.68 +/- 7.00 ml x h(-1) (1.03 +/- 0.11 ml.h(-1)). Drug targeting to the lungs in general and alveolar macrophages in particular was observed. It was concluded that inhaled microparticles can reduce dose frequency and improve the pharmacologic index of the drug combination.

Indexed as

Antitubercular AgentsIsoniazidAdministration, InhalationAnimalsBronchoalveolar Lavage FluidCell LineFemaleKidneyLiverLungMacrophages, AlveolarMaleMiceMice, Inbred BALB CMonocytesMycobacterium tuberculosisAntitubercular AgentsIsoniazidRifabutin

Identifiers

PMID18591268
PMCPMC2533446
OpenAlexW2143478697

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.