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A Revolution in R&D

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mational quality to the level of a known target’s<br />

would be more than recouped <strong>in</strong> due course.<br />

The overall cost of these novel targets—rais<strong>in</strong>g<br />

their <strong>in</strong>formational quality and then pursu<strong>in</strong>g them<br />

down the value cha<strong>in</strong>—is bound to rise <strong>in</strong>itially.<br />

However, with<strong>in</strong> three to five years from the <strong>in</strong>itial<br />

discovery of a target <strong>in</strong> a novel class, accord<strong>in</strong>g to<br />

our model, the overall cost <strong>in</strong>crease per novel-class<br />

drug could return to average.<br />

Where do the added costs come from? And what<br />

must happen to offset them?<br />

The Cost of Quality Control<br />

Our model predicts that the typical <strong>in</strong>crease will be<br />

about $200 million and more than one year per<br />

drug (that is, a total cost of $790 million versus<br />

$590 million, and a total time to drug of 13.8 years<br />

versus 12.7 years). The <strong>in</strong>crease is ma<strong>in</strong>ly attributable<br />

to the extra time needed to understand target<br />

function and develop appropriate assays <strong>in</strong> target<br />

validation and screen<strong>in</strong>g; also, to the need to screen<br />

a higher proportion of compounds, s<strong>in</strong>ce an appropriate<br />

subset of a larger library cannot be selected<br />

<strong>in</strong> advance.<br />

Chemical optimization costs would <strong>in</strong>crease only if<br />

the novel target required a novel compound (by no<br />

means a necessary requirement, though certa<strong>in</strong>ly a<br />

possible one occasionally). Our model exam<strong>in</strong>es<br />

this worst-case scenario explicitly. If a novel target<br />

does happen to require a novel compound, or a<br />

compound unfamiliar to the medic<strong>in</strong>al chemists,<br />

the potential efficiency loss causes a further<br />

<strong>in</strong>crease of $290 million and more than two years<br />

per drug (that is, a total cost of about $1.1 billion<br />

versus $590 million, and a total time to drug of 15<br />

years versus 12.7 years). The additional <strong>in</strong>creases<br />

here would be due to the extra time needed now for<br />

medic<strong>in</strong>al chemists to learn how to modify the compound<br />

and atta<strong>in</strong> specific properties through trial<br />

and error. But this worst-case scenario should not<br />

be very common.<br />

Mov<strong>in</strong>g further still down the value cha<strong>in</strong>, to the<br />

precl<strong>in</strong>ical and cl<strong>in</strong>ical phases, costs are not<br />

expected to <strong>in</strong>crease. The downstream success rate<br />

for novel compounds or targets should turn out to<br />

be much the same as that for known compounds or<br />

targets, as long as the same standards are applied.<br />

There should be no significant <strong>in</strong>crease <strong>in</strong> toxicity<br />

or decrease <strong>in</strong> efficacy, other than <strong>in</strong> very unlikely<br />

circumstances—for <strong>in</strong>stance, if exist<strong>in</strong>g animal<br />

models somehow proved less suitable, or if drugs<br />

for novel target classes were to <strong>in</strong>teract with metabolic<br />

pathways <strong>in</strong> utterly unfamiliar ways.<br />

Offsett<strong>in</strong>g the Costs<br />

Rais<strong>in</strong>g the <strong>in</strong>formational quality of novel targets<br />

<strong>in</strong>volves a heavy <strong>in</strong>vestment, but it is a wise <strong>in</strong>vestment.<br />

And a fairly quick one: knowledge about<br />

one novel target quickly elucidates other potential<br />

targets <strong>in</strong> the same class. Thanks to feedback<br />

loops, knowledge <strong>in</strong>creases geometrically. As more<br />

is learned, the level of <strong>in</strong>vestment can tail off<br />

accord<strong>in</strong>gly.<br />

In any case, the alternatives to mak<strong>in</strong>g that early<br />

<strong>in</strong>vestment <strong>in</strong> <strong>in</strong>formational quality are far from<br />

attractive. On the one hand, dropp<strong>in</strong>g the targets<br />

would be terribly short-sighted: companies would<br />

be forgo<strong>in</strong>g the opportunity to discover and exploit<br />

untapped sources of revenue. On the other hand,<br />

push<strong>in</strong>g novel targets onward without adequate<br />

<strong>in</strong>formation on them would almost certa<strong>in</strong>ly result<br />

<strong>in</strong> a higher failure rate downstream, with all the<br />

associated implications for cost. An <strong>in</strong>creased failure<br />

rate of just 10 percent across chemical optimization<br />

and all of development would on average<br />

<strong>in</strong>crease costs by about $200 million per drug.<br />

To sum up, then: costs <strong>in</strong>curred early <strong>in</strong> the value<br />

cha<strong>in</strong> (by <strong>in</strong>formation gather<strong>in</strong>g) look preferable<br />

to those that would otherwise be <strong>in</strong>curred later (as<br />

the result of a higher downstream failure rate). All<br />

the more so, given that the early costs should soon<br />

beg<strong>in</strong> fall<strong>in</strong>g (<strong>in</strong>vestment <strong>in</strong> <strong>in</strong>formation is almost<br />

always associated with an experience curve): as<br />

novel target classes become <strong>in</strong>creas<strong>in</strong>gly familiar, it<br />

will become <strong>in</strong>creas<strong>in</strong>gly efficient and economical<br />

to pursue new targets with<strong>in</strong> those classes. So with<br />

proper handl<strong>in</strong>g, the burden of that early cost<br />

<strong>in</strong>crease is just a short-term one, and the productivity<br />

of genomics-driven R&D should soon return<br />

19

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