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DOI: 10.5281/zenodo.17306544
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Pho o-pha macology: Ligh -Ac i a ed D ugs o P ecision The apy –
Cu en Ad ances and Fu u e P ospec s
Thube Komal
1
, Shi sa h Disha*
2
Assis an P o esso
1
, Depa men o Quali y Assu ance, Vidya Nike an Ins i u e o Pha macy and
Resea ch Cen e , Bo a.
S uden s o Final Yea B.Pha macy *
2
, Vidya Nike an Ins i u e o Pha macy and Resea ch
Cen e , Bo a.
ARTICLE
INFO
ABSTRACT
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Pape ID: IJASTR-
68E4CD83DB7FE
Recei ed: 2025-09-08
Published: 2025-10-08
DOI:
h ps://dx.doi.o g/10.5281/z
enodo.17306544
Page No: 294-304
Pho o-pha macology means use o ligh o p ecisely d ug deli e a a ge si e. Such a
no el me hods abili y o imp o e d ug speci ici y by educing o - a ge e ec s. The
ene gy o ligh is used o change o shape and chemical p ope ies o he d ug, esul ing
in di e en mechanism o ac ion o d ug. This is done o e en ually o ge con ol when
and whe e d ugs a e ac i e in a e e sible manne , o p e en side e ec s, ad e se
e ec s, and oxici y. I aims o educe sys emic oxici y o d ug and he eme gence o
esis ance, while a aining unp eceden ed co ec ness in ea men . Ligh se es as an
excellen ex e nal s imulus due o i s high spa ial and empo al esolu ion. The use o
ligh o egula e biological p ocesses has e ol ed in o a ib an ield o e he pas
decade. Employing ligh on chemical subs ances such as bioac i e molecules and d ug
deli e y sys ems o e s a p omising he apeu ic app oach o achie e p ecise con ol
o e biological p ocesses. In his e iew, we p o ide an o e iew o he ad ancemen s
in op -chemical echnologies o con olling bioac i e molecules (pho o-pha macology)
and d ug deli e y sys ems (pho o- esponsi e d ug deli e y), wi h an emphasis on hei
ela ionship and biomedical applica ions.
Keywo ds: - Pho o-pha macology, pho o- esponsi e, he apeu ic.
In e na ional Jou nal o Ad anced Scien i ic and Technical
Resea ch
A ailable online on
h p://www. spublica ion.com/ijs /index.h ml
ISSN 2249-9954
Ci e This Pape : Thube Komal and Shi sa h Disha(2025). "Pho o-
pha macology: Ligh -Ac i a ed D ugs o P ecision The apy – Cu en
Ad ances and Fu u e P ospec s". INTERNATIONAL JOURNAL OF
ADVANCED SCIENTIFIC AND TECHNICAL RESEARCH (IJASTR), ol. 15,
no. 5, 2025, pp. 294-304. DOI: h ps://dx.doi.o g/10.5281/zenodo.17306544
In e na ional Jou nal o Ad anced Scien i ic and Technical Resea ch ISSN 2249-9954
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DOI: 10.5281/zenodo.17306544
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In oduc ion
:-
Pho o-pha macology means use o ligh o p ecisely d ug deli e a a ge si e. Such a
no el me hods abili y o imp o e d ug speci ici y by educing o - a ge e ec s [1]. The
ene gy o ligh is used o change o shape and chemical p ope ies o he d ug, esul ing in
di e en mechanism o ac ion o d ug. This is done o e en ually o ge con ol when and
whe e d ugs a e ac i e in a e e sible manne , o p e en side e ec s, ad e se e ec s,
and oxici y [2]. Selec i i y o a ge si e/o gan can be augmen ed by a ious app oaches and
pho o-pha macology is one such app oach. Pho o-pha macology gi e us an ex e nal pho o-
swi ch o manage o - a ge si e d ug ac ion, and hus helps o each selec i e a ge ac ion and
alle ia e o - a ge oxici y and esul an side e ec s. [3] Selec i i y o a ge issue/si e is a
p oblem wi h mos o he d ugs; mos o he si es o ac ions o d ugs ( ecep o s, enzymes, ion
channels, and ca ie molecules) a e exp essed in o he si es/ issues/o gans and he ac ion
o d ugs in hese si es leads o in ole able side e ec s, poo d ug deli e y, and hen eme gence
o esis ance [4]. Pho o-pha macology is an eme ging mul idisciplina y ield ha combines
pho ochemis y and pha macology.[5]Buil upon he abili y o ligh o change he
pha macokine ics and pha macodynamics o bioac i e molecules, i aims a egula ing he
ac i i y o d ugs in i o by using ligh .[6] The ligh -based modula ion is achie ed by inco po a ing
molecula pho o swi ches such as azobenzene and dia yle henes so pho o cages such as o-ni o-
benzyl, couma one, and BODIPY compounds in o he pha macopho e.[7] This selec i e ac i a ion
o he biomolecules helps p e en o minimize o - a ge ac i i y and sys emic side e ec s.
Mo eo e , ligh being he egula o y elemen o e s addi ional ad an ages such as he abili y o
be deli e ed wi h high spa io empo al p ecision, low o negligible oxici y, and he abili y o be
con olled bo h quali a i ely and quan i a i ely by uning i s wa eleng h and in ensi y.[8]
Pho o-pha macology is a ield o esea ch ha combines pho ochemis y and pha macology o
de elop ligh -con olled he apeu ic agen s. The p inciple in ol es using ligh o ac i a e o
deac i a e d ugs, allowing o p ecise con ol o e hei e ec s.
Key
Concep s
:-
1. Ligh -sensi i e molecules: Designing molecules ha change con o ma ion o ac i i y in
esponse o ligh .
2. Re e sible swi ching: Enabling d ugs o be swi ched on o o epea edly using di e en
wa eleng hs o ligh .
3. Spa ial and empo al con ol: Allowing o p ecise con ol o e d ug ac i i y in speci ic issues
o cells.
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Fig1. Pho o-pha macology: Ligh -Ac i a ed D ugs
Mechanism o
ligh
ac i e
d ug
con ol:-
Ligh -ac i a ed d ug con ol (also called pho opha macology) is a mode n he apeu ic s a egy
whe e ligh is used o swi ch d ugs ON o OFF in a p ecise, e e sible, and con ollable manne .
This allows ea men only a he diseased si e while a oiding side e ec s in heal hy issues. Ligh -
ac i a ed d ug con ol (also called pho opha macology) is a mode n he apeu ic s a egy whe e
ligh is used o swi ch d ugs ON o OFF in a p ecise, e e sible, and con ollable manne . This
allows ea men only a he diseased si e while a oiding side e ec s in heal hy issues. Ligh -
ac i a ed d ug con ol (also called pho opha macology) is a mode n he apeu ic s a egy whe e
ligh is used o swi ch d ugs ON o OFF in a p ecise, e e sible, and con ollable manne . This
allows ea men only a he diseased si e while a oiding side e ec s in heal hy issues.
In e na ional Jou nal o Ad anced Scien i ic and Technical Resea ch ISSN 2249-9954
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DOI: 10.5281/zenodo.17306544
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Fig 2
.
mechanism
o
ligh
ac i a e
d ug
con ol
.
Applica ion
:-
1.Ta ge ed he apy: Reducing side e ec s by ac i a ing d ugs only in a ec ed a eas.
2. Dose con ol: Adjus ing d ug ac i i y in eal- ime using ligh .
3 .Te sonalized medicine: Tailo ing ea men o indi idual needs using ligh -con olled
he apeu ics.
4. Oph halmology: Used o es o e ligh sensi i i y in e inal degene a i e diseases like e ini is
pigmen osa.
5.Ca dio ascula Resea ch: Used o egula e hea muscle con ac ion o ascula one h ough
pho oswi chable d ugs.
Po en ial
Bene i s
:-
1. Imp o ed e icacy: Enhancing ea men ou comes by p ecise con ol o e d ug ac i i y.
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2. Reduced oxici y: Minimizing side e ec s by limi ing d ug ac i i y o a ge ed a eas.
3. Inc eased sa e y: Allowing o apid e e sal o d ug e ec s i needed.
4. Cus omizable o di e en diseases: D ugs can be designed o espond o speci ic wa eleng hs
enabling use ac oss cance ,neu ology,op halomolgy and in ec ion con ol.
Challenges
:-
1. De eloping ligh -sensi i e molecules: Designing molecules ha espond o ligh wi hou
comp omising d ug e icacy.
2. Deli e ing ligh : Ensu ing e ec i e ligh deli e y o a ge issues.
3. Toxici y and sa e y: E alua ing po en ial oxici y and ensu ing sa e use o ligh -con olled
he apeu ics. (9)
4.Complex d ug design: C ea ing d ugs ha a e bo h ligh -sensi i e and biologically ac i e is
di icul .
5.Regula o y and clinical challenges: App o al equi es p oo o sa e y,s abili y and
ep oducibili y.
Pho o pha macology elies on se e al key echnologies:
1. Pho o-swi chable Molecules: Designing molecules ha can change con o ma ion o ac i i y in
esponse o ligh , allowing o e e sible swi ching o d ug ac i i y.
2. Op -gene ics: Using ligh o con ol cellula p ocesses, including gene exp ession and p o ein
ac i i y, o achie e p ecise con ol o e d ug e ec s.
3. Pho o-caging: Using ligh -sensi i e p o ec ing g oups o mask d ug ac i i y un il ac i a ed by
ligh , enabling spa ial and empo al con ol.
4. Ligh -Deli e y Sys ems: De eloping sys ems o deli e ligh o speci ic issues o cells, such as
op -gene ic implan s o LED-based de ices.
5. Nano echnology: Using nanopa icles o deli e ligh -sensi i e molecules o enhance ligh
deli e y o a ge issues.
6. Molecula Enginee ing: Designing and syn hesizing molecules wi h speci ic ligh -sensi i e
p ope ies, enabling p ecise con ol o e d ug ac i i y.
These echnologies enable he de elopmen o ligh -con olled he apeu ics, o e ing po en ial
bene i s in a ge ed he apy, dose con ol, and pe sonalized medicine. (10)
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Pho o-pha macology he apy:-
Fig3.Pho opha macolgy The apy.
1. Cance T ea men :-
Ta ge ed he apy: Ac i a ing d ugs only in cance ous issues, educing side e ec s.
P ecision medicine: Tailo ing ea men o indi idual cance p o iles.
2. Neu ological Diso de s:-
P ecise con ol: Regula ing neu al ac i i y wi h ligh , po en ially ea ing condi ions like epilepsy
o Pa kinson's disease.
Res o ing unc ion: Using ligh o ac i a e o inhibi speci ic neu al pa hways.
3. Pain Managemen :-
Ta ge ed analgesia: Ac i a ing pain- elie ing d ugs only in a ec ed a eas, educing side e ec s.
P ecise con ol: Adjus ing pain elie in eal- ime using ligh .
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4. In ec ious Diseases:-
Ta ge ed he apy: Ac i a ing an imic obial d ugs only in in ec ed issues, educing side e ec s.
P ecision medicine: Tailo ing ea men o indi idual in ec ion p o iles.
5. Oph halmology :-
P ecise con ol: Using ligh o egula e d ug ac i i y in he eye, po en ially ea ing condi ions like
age- ela ed macula degene a ion. (11)
Bene i s
:-
1. Imp o ed e icacy: Enhancing ea men ou comes wi h p ecise con ol.
2. Reduced oxici y: Minimizing side e ec s wi h a ge ed he apy.
3. Inc eased sa e y: Allowing o apid e e sal o d ug e ec s. (12)
Ad an ages o Pho o-pha macology:-
1. P ecise con ol: Pho o-pha macology allows o p ecise con ol o e d ug ac i i y, enabling
a ge ed he apy and educing side e ec s.
2. Re e sible swi ching: Pho o-pha macological agen s can be swi ched on and o epea edly,
allowing o dynamic con ol o e d ug e ec s.
3. Spa ial and empo al con ol: Pho o-pha macology enables con ol o e d ug ac i i y in
speci ic issues o cells, educing sys emic side e ec s.
4. Pe sonalized medicine: Pho o-pha macology can be ailo ed o indi idual needs, allowing o
pe sonalized ea men app oaches.
5. Imp o ed e icacy: Pho o-pha macology can enhance ea men ou comes by op imizing d ug
ac i i y and educing side e ec s. (13)
Limi a ions o Pho o-pha macology:-
1. Ligh pene a ion: Ligh may no pene a e deeply in o issues, limi ing he applica ion o
pho o-pha macology o supe icial issues.
2. Toxici y: Pho o-pha macological agen s may ha e unin ended oxici y o side e ec s, equi ing
ca e ul e alua ion.
3. Complexi y: Pho o-pha macology equi es complex molecula design and syn hesis, as well as
sophis ica ed ligh -deli e y sys ems.
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4. Limi ed wa eleng h ange: Pho o-pha macological agen s may only espond o speci ic
wa eleng hs o ligh , limi ing hei applica ion.
5. Technical challenges: Pho o-pha macology equi es specialized equipmen and expe ise,
which can be a ba ie o widesp ead adop ion. (14)
Fu u e Di ec ions:-
1. Imp o ing ligh pene a ion: De eloping new ligh -deli e y sys ems o agen s ha can
pene a e deepe in o issues.
2. Op imizing molecula design: Designing mo e e ec i e and selec i e pho o pha macological
agen s.
3. Add essing oxici y: E alua ing and mi iga ing po en ial oxici y and side e ec s o pho o
pha macological agen s.
4. Expanding applica ions: Explo ing new applica ions o pho o pha macology in a ious medical
ields. (15)
Recen ad ances in pho o-pha macology:-
Applica ions
:-
Cance T ea men : Pho o-pha macology is being explo ed o a ge ed cance he apy, whe e
ligh -ac i a ed d ugs can selec i ely kill cance cells while minimizing ha m o heal hy issues.
Resea che s ha e de eloped nanopa icles ha can deli e pho osensi ize s o umo s,
enhancing pho odynamic he apy's e ec i eness.
Neu ological Diso de s: Scien is s a e wo king on using pho o-pha macology o egula e neu al
ac i i y, which could lead o new ea men s o condi ions like epilepsy o Pa kinson's disease.
Ca dio ascula Diseases: A ecen s udy demons a ed he po en ial o pho o-pha macology in
minimizing damage a e myoca dial in a c ion by using ligh -sensi i e molecules o a ge
speci ic a eas o he hea . (16)
Technological Ad ancemen s:-
Pho o-swi chable Molecules: Resea che s ha e de eloped pho o-swi chable molecules ha can
change con o ma ion o ac i i y in esponse o ligh , allowing o p ecise con ol o e d ug
ac i i y.
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Nano echnology: Nanopa icles and Nano-emulsions a e being used o deli e pho osensi ize s
o d ugs o speci ic a ge s, enhancing he e icacy o pho odynamic he apy.
Op -gene ics: The in eg a ion o op -gene ics wi h pho o-pha macology enables p ecise con ol
o e cellula p ocesses, o e ing new a enues o ea ing a ious diseases. (17)
Fu u e Di ec ions:-
P ecision Medicine: Pho o-pha macology holds p omise o p ecision medicine, enabling ailo ed
ea men s wi h imp o ed e icacy and educed side e ec s.
Regene a i e Medicine: Resea che s a e explo ing he po en ial o pho o-pha macology in
egene a i e medicine, whe e pho o-swi ches can modula e signaling pa hways o a ge ed
issue epai and egene a ion.
O e coming Challenges: Despi e he po en ial, challenges such as ligh pene a ion and oxici y
need o be add essed o pho o-pha macology o become a clinical eali y. (18)
Challenges
and
u u e
di ec ions
:-
Challenges:-
Ligh Pene a ion: One o he bigges challenges is deli e ing ligh o deep issues wi hou causing
damage o sca e ing. Resea che s a e explo ing ways o o e come his, such as using nea -
in a ed ligh - esponsi e molecules o de eloping implan able ligh -deli e y sys ems.
S able and Biocompa ible Pho o-swi ches: De eloping pho o-swi ches ha a e s able,
biocompa ible, and selec i e o a ge ecep o s is c ucial. This equi es op imizing molecula
design and syn hesis.
Speci ici y and Toxici y: Ensu ing ha pho o-swi chable molecules a e speci ic o hei a ge s
and don' cause o - a ge e ec s o oxici y is essen ial.
Limi ed Wa eleng h Range: Mos pho o-pha macological compounds espond o UV ligh , which
has limi ed issue pene a ion. De eloping compounds ha espond o longe wa eleng hs, like
ed o in a ed ligh , is necessa y o deepe issue applica ions. (19)
Fu u e
Di ec ions
:-
P ecision Medicine: Pho o-pha macology holds p omise o p ecision medicine, enabling ailo ed
ea men s wi h imp o ed e icacy and educed side e ec s.
